GE 24922 Universal Remote manual
Remotes · 53 Q&As

GE 24922 Universal Remote

Ask AI

— answers from the official manual

Answers from the official manual.

Common questions

Common Questions

53 total
1

Why does my remote only control some functions of my device but not all?

A particular code may only support some functions of your device. Try programming the remote with a different code from the code list to find one that offers more functionality. The remote may also not control all functions of every device. (Page 13)

2

How do I program the remote using Automatic Code Search?

Turn on the device manually, hold SETUP until the red light stays on, release, then press the appropriate device button. Point the remote at the device and press ON-OFF (for TV) or PLAY (for DVD/VCR) to begin the search — the red light will blink approximately every 2 seconds. When the device turns off or starts playing, press button #1 within about 2 seconds to lock in the code. (Page 9)

3

How long do I have to replace the batteries before losing my programmed codes?

You have up to 10 minutes to replace the batteries without losing your programmed codes. However, you must not press any buttons while the batteries are removed, as pressing buttons without batteries installed will cause all codes to be lost. (Page 3)

4

What should I do if the remote controls some but not all functions of my device?

Sometimes a particular code only enables some functions of a device. Try programming the remote with a different code from the code list to find one that enables more functions. You can also continue using the Automatic Code Search method to find a better matching code. (Page 8)

5

What does it mean when the red indicator blinks and stays on after I enter a code?

When the red indicator blinks and remains on after entering a code, it means the remote did not accept the code entered. Try programming the code again or enter a different code from the code list for your device. (Page 13)

6

How do I control a combo device like a TV/DVD combination unit?

Combination devices require setting up two different device mode buttons — one for each part of the combo unit. For example, for a TV/DVD combo, program a code on the TV button to control the TV portion and a separate code on another mode button (such as DVD) to control the DVD portion. (Page 10)

Show 47 more questions

How do I reset the remote to its default settings?

How do I install the batteries in the GE 24922 universal remote?

How long will the remote keep my programmed codes if I remove the batteries?

How do I use the Auto Code Search to program my device?

What should I do if the red indicator blinks and stays on after I enter a code?

How does the Master Volume feature work and how do I enable it?

What type and how many batteries does the GE 24922 universal remote require?

What battery precautions should I follow when using the GE 24922 remote?

How do I install batteries in the GE 24922 Universal Remote?

How do I program my remote using direct code entry?

What should I do if the remote doesn't control my device after programming?

How do I use the automatic code search feature?

What does it mean if the red indicator flashes and stays on after entering a code?

Can I control combined devices like a TV/DVD combo with this remote?

How do I set up the Master Volume function?

How do I factory reset the remote to its default settings?

What battery precautions should I follow?

What steps should I take if my heat pump shows an E1 error code?

How do I troubleshoot a heat pump showing an E3 error code?

What should I do if my heat pump displays an E4 error code?

How do I handle an F2 condenser temperature sensor error?

What steps should I follow when encountering F6 error code referring to an ODU tube temperature sensor?

How do I address a compressor overload issue causing an H4 error?

What is the procedure for resolving an H5 IPM protection error?

How do I correct a PA AC Current Protection failure?

What actions are needed for an HC PFC Protection alert?

Why might my heat pump suddenly stop working after startup?

How do I program the remote using Direct Code Entry?

How do I identify what code is currently programmed for a device?

How do I set up the Master Volume feature so one device always controls the volume?

Will I lose my programmed codes if I change the batteries?

What are the two methods for programming this universal remote?

What should I do if my remote stops working correctly?

What devices can the GE 24922 universal remote control?

Can I mix old and new batteries in the remote?

What is the battery saver feature and how does it work?

How do I start the direct code entry programming process?

What should I do if my remote stops working properly?

How do I install batteries in my GE universal remote?

How do I start programming the remote using Direct Code Entry?

How long do I need to hold the SETUP button when programming?

How do I install the batteries in my GE universal remote?

What devices can the GE 24922 remote control?

How do I select which device I want to control?

Will I lose my programmed codes if I remove the batteries?

What are the two methods for programming this remote?

What type and size of batteries does the GE 24922 remote require?

Full Manual

102 pages
Page 1

Service Manual

Instructions

Connect Series Split Heat Pumps

| | | |---|---| | | |

| | | |---|---| | | |

Rev. 07-20

ENGLISH

Foreword

Thank you for choosing GE Appliances Connect Series heat pumps.. Please read this manual carefully in order to properly install the equipment and maximize customer satisfaction.

This manual specifies safe operation requirements from perspectives of product introduction, control, troubleshooting and maintenance, as well as basic principles and implementation methods. Professional operators must abide by relevant national (local) safety requirements and technical specifications set forth in this manual during operations; otherwise, the air conditioning system may fail or be damaged, and personnel safety may be compromised.

![image 1](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile1.png)

Please read this manual before installing this heat pump.

Before repairing the air conditioner, please first read the technical service manual.

Please read this instruction manual before operating this heat pump

Contents

Page 2

Safety Notifications ......................................................................................................................................................1 Introduction ..................................................................................................................................................................3

Lists of Units...............................................................................................................................................................................................................3

Controls .........................................................................................................................................................................4 Operation Modes ......................................................................................................................................................................................................4 Control Modes ...........................................................................................................................................................................................................6 Functions .....................................................................................................................................................................................................................7

Troubleshooting ......................................................................................................................................................... 10 Wiring Diagrams ..................................................................................................................................................................................................... 10 PCB Layout ................................................................................................................................................................................................................13 Error Codes................................................................................................................................................................................................................21 Troubleshooting ......................................................................................................................................................................................................22 Failures Not Caused by Errors ......................................................................................................................................................................... 36

Maintenance ................................................................................................................................................................37 System Diagram ......................................................................................................................................................................................................37 System Evacuation ................................................................................................................................................................................................37 Refrigerant Charging ............................................................................................................................................................................................38 Maintenance of Major Components ................................................................................................................................................................39 Removal of Major Components ....................................................................................................................................................................... 46 Exploded View and Parts Lists ........................................................................................................................................................................80

########## Appendices .................................................................................................................................................................86

Temperature Sensor Temperature/Resistance/Voltage Lists .............................................................................................................. 86 15 KΩ Temperature Sensors (including ODU temperature sensors) ........................................................................................... 86 20 KΩ Pipeline Temperature Sensors (including temperature sensors for defroster, IDU and ODU pipes) ............... 88 50 KΩ Discharge Temperature Sensors (including discharge air temperature sensor) ......................................................90

Refrigerant R-410A Temperature/Pressure List .........................................................................................................................................92

Indoor Unit Airflow data............................................................................................................................................................................................ 94

Operation Tools...................................................................................................................................................................................................... 98

CONNECT SERIES SERVICE MANUAL

PROHIBITED:

  • • Do not pierce or burn.
  • • Please note that refrigerant may be odorless.
  • • The appliance shall be stored in a room without continuously operating ignition sources (For example: open flames, an operating gas appliance or an operating electric heater).
  • • Indoor unit adopts special joints that can’t be detached. The installation method is the same with the common joints. Because the joint can’t be detached and if it is leaking; it must be cut out and replaced with a braze joint.
  • • Using unsuitable parts or tools may lead to electric shock or fire hazard.
  • • Please ventilate the room immediately if refrigerant leaks during maintenance. Heavy leakage may lead to breathing difficulty, severe injury or death.
  • • Disconnect power before disassembling the appliance for maintenance.
  • • The appliance should be maintained and cared by authorized technical personnel with necessary qualifications.
  • WARNING:

    NOTICE:

    Page 3

  • • If the unit location is more than 6 feet high, please wear a safety helmet, gloves and a safety belt.
  • • Never mix any other substances except the specified refrigerant into the refrigerant circuit.
  • • Check the location to see if the weight can be properly supported before installing the unit.
  • • Please test the system for leaks prior to charging. Leaks discovered after the unit start up require refrigerant pump-down, leak repair and recharging. Do not allow refrigerant to leak into unventilated spaces.
  • • Prepare suitable tools and protectors.
  • • Please isolate all power to the system while making repairs and performing maintenance.
  • Maintenance Safety

  • • This unit requires a proper earth ground per local and national electrical codes.
  • • Never repair the unit with wet hands. Operating the unit with wet hands may lead to electric shock.
  • • Isolate all power sources before cleaning the unit.
  • • All field installed wiring must conform to local and national electric codes.
  • • Brazing, welding and cutting must de done in properly ventilated areas.
  • • Gas appliances, heaters and other fire sources should be kept away from the installation and maintenance site.
  • • Maintenance should be done according to manufacturer’s instructions.
  • OBSERVED:

  • • Check all condensate drain outlets during maintenance and operational checks.
  • • Unit should be installed level and on a surface that will sufficiently support it’s weight.
  • • Disassembly of the unit, handling of the refrigerant, oil and accessories should all be done according to applicable local rules and regulations.
  • ENGLISH

    ENGLISH

    ##### Operation Safety

    PROHIBITED:

  • • Never try to modify the unit, otherwise, it may cause electric shock, overheat or fire hazard.
  • • Replace all wires that have worn or damaged insulation.
  • • This equipment must have a dedicated electrical circuit and service disconnect switch.
  • Page 4

  • • Maintain a regular schedule for presentative maintenance.
  • • Do not remove the fan cover while the unit is running.
  • • Use soap and water only to clean the unit. Do not use any solvents to clean the control panel.
  • • Isolate all power to the system before cleaning the unit.
  • WARNING:

    NOTICE:

    Introduction

    ##### Lists of Units Outdoor Units

    |Model|Power Supply|Circuit Breaker Capacity|Appearance| |---|---|---|---| |Model|V/Ph/Hz|A|Appearance| |AUH2436ZGDA|208/230V-1Ph-60Hz|35|![image 2](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile2.png)| |AUH4860ZGDA|208/230V-1Ph-60Hz|45|![image 3](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile3.png)|

    ENGLISH

    Indoor Units

    |Model|Cooling/Heating Capacity (Btu/h)|Power Supply|Fuse Capacity|Circuit Breaker Capacity|Appearance| |---|---|---|---|---|---| |Model|Cooling/Heating Capacity (Btu/h)|V/Ph/Hz|A|A|Appearance| |UUY24ZGDAA|24000/24000|208/230V-1Ph-60Hz|3.5|15|![image 4](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile4.png)| |UUY36ZGDAA|36000/36000|208/230V-1Ph-60Hz|3.5|15|![image 4](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile4.png)| |UUY48ZGDAA|48000/48000|208/230V-1Ph-60Hz|3.5|15|![image 5](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile5.png)| |UUY60ZGDAA|54000/54000|208/230V-1Ph-60Hz|3.5|15|![image 5](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile5.png)|

    ENGLISH

    Page 5

    ##### Operation Modes Cooling Mode

    Power On

    Cooling start control

    Indoor fan run

    No

    Compressor stop for 3 minutes

    Satisfying open Compressor condition

    Yes

    No

    Compressor and outdoor fan run

    Meet the temperature point shutdown condition

    Compressor and outdoor fan stop

    Yes

    Meet the oil return condition

    No

    Yes Yes

    Meet the oil return end condition

    Oil return separation

    Page 6

    No

    ######### Heating Mode

    Power On

    Heating start control

    Indoor fan run

    No

    Compressor stop for 3 minutes

    Satisfying open Compressor condition

    Yes

    No

    Compressor and outdoor fan run

    Meet the temperature point shutdown condition

    Compressor and outdoor fan stop

    Yes

    Yes

    Meet the oil return condition

    No

    Meet the defrost end condition

    Page 7

    Yes No

    No

    Meet the oil return end condition

    Meet the defrost condition

    Meet the defrost condition

    Oil return separation

    Yes Yes

    No

    Control Modes Based Control Compressor Control

    When the unit comes on in heating or cooling mode; the indoor fan will run for a short time before the compressor starts. Under different modes, the compressor can only be stopped after running for some time (special cases excluded). This is to protect the compressor from short-cycling. Once the compressor has stopped, it cannot be operated right away due to a time delay.

    EXV Control

    The electric expansion valve will reset when the unit is first started. During the process, the expansion valve will make clicking sounds. The valve will open to a predetermined step before the unit starts in cooling or heating mode.

    Outdoor Fan Control

    This series heat pump has two types of outdoor units: one with a single fan and the other with dual fans. The outdoor fan can run at the highest level 10 and the lowest level 1. By controlling the speed of outdoor fan, the unit can achieve cooling at low temperature and heating at high temperature. The outdoor unit fan will not run while the system is set to indoor fan mode only.

    4-way Valve Control

    The 4-way valve will be energized in heat mode (after a brief time delay) on start-up. The 4-way valve will be de energized during cooling and defrost modes.

    The 4-way valve will continue to be energized in heating mode after the unit stops. This occurs so the valve will not inadvertently shift into cooling position.

    There must be adequate differential pressure for the 4-way valve to function properly. Special Control Defrosting Control

    Page 8

    Defrosting will start when the temperature sensed by outdoor tube outdoor coil temperature drops below a calculated value. The 4-way valve will switch to the cooling mode, and outdoor and indoor fan will both stop. The defrost cycle will terminate when the outdoor coil temperature reaches the calculated defrost termination value. The 4-way valve will switch back to the heating mode, and the compressor and outdoor fan(s) will restart.

    Oil Return Control

    The system will enter oil return mode if the compressor has been running at low frequency for an extended period. The system will exit oil return mode in about 5 minutes.

    Protection Control High Pressure Protection Control

    The system will shut the compressor down if the high pressure switch is open continuously for a short period of time and display an E1 error code. The compressor will restart after the switch closes for a short period of time. The system will shut the compressor down if the switch opens again within a predetermined time interval. The system will remain in a locked out condition until the power is cycled to the unit.

    Low Pressure Protection Control

    The system will shut the compressor down if the low pressure switch opens for a short time and display an E3 error code. The system will automatically restart the compressor when the switch closes after a short time delay. The system will shut the compressor down if the switch subsequently opens again within a predetermined time and will require a power reset to restart.

    High Temperature Prevention Control

    The system will enable high temperature prevention control while in heating mode if the indoor coil temperature rises above a predetermined threshold. The outdoor fan will slow down during high temperature protection mode.

    Discharge High Temperature Protection Control

    System will enable discharge temperature protection control if the discharge high temperature sensor is detected open for a predetermined amount of time. The system will shut down and display error code E4 during high temperature protection. The system will restore operation when the discharge temperature drops below the safety threshold. The system will lock out if high discharge temperature is sensed again during a certain time period and power must be reset to the unit.

    Functions Capacity Selection Set the capacity of the outdoor unit through DIP switch SA2-1 on the outdoor unit main control board.

    |Outdoor DIP SA2-1|Outdoor DIP SA2-1|Outdoor DIP SA2-1|Outdoor DIP SA2-1| |---|---|---|---| |AUH2436ZGDA|AUH2436ZGDA|AUH4860ZGDA|AUH4860ZGDA| |24K|36K|48K|60K| ||On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4| ||On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    Page 9

    ||On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4| ||On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4| | |Indicates switch position|Indicates switch position|Indicates switch position|Indicates switch position|

    ######### Set Defrost Mode

    DIP switch SA2-2 on the outdoor unit main control board determines the defrost mode. The following is an example of the defrost setting for a 36k unit. Standard Defrost is default, and Strong Defrost is suitable for defrosting in ultra-low temperature environments.

    |Outdoor DIP SA2-2|Outdoor DIP SA2-2| |---|---| |Standard Defrost (default)|Strong Defrost| ||On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4| ||On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4| | |Indicates switch position|Indicates switch position|

    ######### Set Operating Mode

    DIP switches SA2-3 & SA2-4 on the outdoor unit main control board select the operating mode. The following example shows the 36K outdoor unit. Standard Mode is the default mode.

    The heat pump can easily be set to increase the output capacity by adjusting the DIP switches to Strong Mode. The heat pump can also be set to Energy Saving mode if the load is less than expected.

    Page 10

    |Outdoor DIP SA2-3/SA2-4|Outdoor DIP SA2-3/SA2-4|Outdoor DIP SA2-3/SA2-4| |---|---|---| |Standard Mode (default)|Strong Mode|Energy Saving Mode| ||On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4| ||On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4| ||On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4| | |Indicates switch position|Indicates switch position|Indicates switch position|

    ######### Set Indoor Fan Speed

    Set the indoor fan speed through the indoor main control board DIP switches. The higher level, the higher the speed of the indoor unit fan.

    UUY24ZGDAA UUY36ZGDAA HEAT (Indoor DIP SA2) COOL (Indoor DIP SA1) HEAT (Indoor DIP SA2) COOL (Indoor DIP SA1)

  • Level 1
  • (default)

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    Page 11

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

  • Level 2
  • |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    Page 12

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

  • Level 3
  • |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    UUY48ZGDAA UUY60ZGDAA HEAT (Indoor DIP SA2) COOL (Indoor DIP SA1) HEAT (Indoor DIP SA2) COOL (Indoor DIP SA1)

    Page 13

  • Level 1
  • (default)

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

  • Level 2
  • |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    Page 14

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

  • Level 3
  • |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---|

    Page 15

    |Off| | | | | | |1|2|3|4|

    |On| | | | | |---|---|---|---|---| |Off| | | | | | |1|2|3|4|

    Indicates switch position

    ######### Forced Defrost Control

    Press and hold the SW1 button for about 5 seconds to enter the first menu level. The outdoor unit main board display will flash. Short-press the SW1 button to switch the function to “06”. Short-press SW2 or SW3 to change the selection within function “06” to “ON”, followed by a short-press on SW1 to save. The menu will time out if no function is performed within 10 seconds.

    Refrigerant Recovery Control Press and hold the SW1 button for about 5 seconds to enter the first menu level. The outdoor unit main

  • board display will flash. Short-press the SW1 button to switch the function to “08”. Short-press SW2 or SW3
  • to change the selection within function “08” to “ON”, followed by a short-press on SW1 to save. The menu will time out if no function is performed within 10 seconds.
  • Forced Operation Control

    Press and hold the SW1 button for about 5 seconds to enter the first menu level. The outdoor unit main board display will flash. Short-press the SW1 button to switch the function to “09”. Short-press SW2 or SW3

  • to change the selection within function “09” to “ON”, followed by a short-press on SW1 to save. The menu will time out if no function is performed within 10 seconds.
  • Press and hold SW1 for about 5 seconds to enter the first menu level. The outdoor unit main board display will flash. Short-press the SW1 button to switch the function to "11". Short-press SW2 or SW3 to change the selection to:

  • 00 - Pressure
  • 01 - Frequency
  • 02 - Exhaust temperature 08 - Fan speed Short-press SW1 to save. The data will be displayed on the LED.
  • Page 16

    Thermostat Functions Please refer to your thermostat user guide for information on your thermostat functions.

    ##### Wiring Diagrams

    The following electric diagram is for reference only. Please refer to diagram attached to the unit as the latest version.

    Outdoor Units Model: AUH2436ZGDA

    ![image 6](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile6.png)

    ############ Model: AUH4860ZGDA

    ![image 7](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile7.png)

    ####### ENGLISH

    Indoor Units Model: UUY24ZGDAA, UUY36ZGDAA

    ![image 8](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile8.png)

    Model: UUY48ZGDAA, UUY60ZGDAA

    ![image 9](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile9.png)

    ##### PCB Layout Interface

    Indoor unit: Model: UUY24ZGDAA, UUY36ZGDAA, UUY48ZGDAA, UUY60ZGDAA

    Main Board

    ![image 10](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile10.png)

    |No.|Printing|Interface No.|Interface No.|Printing|Interface| |---|---|---|---|---|---|

    Page 17

    |1|AC-N (X2)|Neutral wire input|8|X9 (G_SCAN)|Indoor motor check| |2|AC-L (X1)|Live wire input|9|X14 (OFAN-H-OUT)|AC motor high speed output| |3|CN3|Wired control communication interface|10|X11 (OFAN-H-IN)|AC motor high speed input| |4|CN1|DC motor output|11|X8 (OFAN-L-IN)|AC motor low speed input| |5|X7|Transformer Neutral wire input|12|X6(OFAN-L-OUT)|AC motor low speed output| |6|X13|Transformer Live wire input|13|X3 (C)|Transformer Neutral wire output| |7|X10 (O_SCAN)|4-Way check|14|X4 (R)|Transformer Live wire output|

    ########### Motor Board

    ![image 11](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile11.png)

    |No.|Printing|Interface No.|Interface No.|Printing|Interface| |---|---|---|---|---|---| |1|DC-MOTOR1|DC motor output|2|COM2|DC motor control signal input|

    Indoor unit: Model: AUH2436ZGDA, AUH4860ZGDA

    Main Board

    ![image 12](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile12.png)

    |No.|Printing|Interface No.|Interface No.|Printing|Interface| |---|---|---|---|---|---| |1|AC-L|Live wire input|11|H-PRESS|High pressure sensor interface| |2|AC-N|Neutral wire input|12|LPP|System low pressure protection interface| |3|HEAT_TIE_B|Chassis electric heating belt|13|HPP|System high pressure protection interface| |4|HEAT_TIE_C|Compressor electric heating belt|14|T_SENSOR2|2. Outdoor tube temperature sensor interface

    4. Outdoor ambient temperature sensor interface

    6. Discharge temperature sensor interface| |5|4WAY|4-way valve|15|T_LAC|Low temperature cooling temperature sensing| |6|VA|Electromagnetic valve interface|16|COM7|Unit communication interface| |7|FA|Electronic expansion valve interface|17|CN6|GPRS communication interface| |8|FA1|Electronic expansion valve 1 interface Refrigerant heat dissipation|18|COM-MANUAL|Thermostat interface| |9|COMM1|Drive communication interface|19|DC_MOTOR1
    DC_MOTOR2
    |DC motor output| |10|L-PRESS|Low pressure sensor interface|20|PWR1|310V DC power supply interface|

    Page 18

    Drive Board Model: AUH2436ZGDA

    9

    8

    13

    10

    #### ⑩

    ![image 13](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile13.png)

    7

  • ⑩11
  • ⑩12
  • 17

    5

    6

    15

    Page 19

    16

    14

    3

    4

    1

    2

    #### ⑩

    |No.|Printing|Interface No.|Interface No.|Printing|Interface| |---|---|---|---|---|---| |1|L2-2|PFC induction wire (blue)|10|P-OUT|Reserved| |2|AC-L|Live wire|11|L1-2|PFC induction wire (white)| |3|L1-1|PFC induction wire (brown)|12|L2-1|PFC induction wire (yellow)| |4|N|Neutral wire|13|G-OUT|Reserved|

    Page 20

    |5|COMM1|Communication terminal, same with COMM|14|U|Compressor U phase terminal| |6|COMM|Communication terminal, same with COMM1|15|V|Compressor V phase terminal| |7|PWR|Drive power supply terminal|16|W|Compressor W phase terminal| |8|DC-MOTOR1|DC fan terminal|17|JTAG1|Programming interface (for testing)| |9|DC-BUS1|Power discharge terminal (for testing)| | | |

    Model: AUH4860ZGDA

    47

    ![image 14](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile14.png)

  • 1
  • 2
  • 3
  • 8
  • 12

    13

  • 9
  • 5
  • 11

  • 6
  • Page 21

    10

    |No.|Printing|Interface No.|Interface No.|Printing|Interface| |---|---|---|---|---|---| |1|L2-2|PFC induction wire (blue)|8|L1-2|PFC induction wire (white)| |2|AC-L|Live wire|9|U|Compressor U phase terminal| |3|L1-1|PFC induction wire (brown)|10|V|Compressor V phase terminal| |4|N|Neutral wire|11|W|Compressor W phase terminal| |5|JTAG1|Programming interface (for testing)|12|PWR|Drive power supply terminal| |6|COMM|Communication terminal, same with COMM|13|DC-BUS|Power discharge terminal (for testing)| |7|L2-1|PFC induction wire (yellow)| | | |

    Filtering Board Model: AUH2436ZGDA

    2

    #### ⑩

    ![image 15](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile15.png)

    1

  • 5
  • ⑩6 ⑩ 7

    |No.|Printing|Interface No.|Interface No.|Printing|Interface| |---|---|---|---|---|---| |1|⑩AC-L|Power input live wire terminal|5|N-OUT|Power output neutral wire terminal (reserved)| |2|7AC-N|9Power input neutral wire terminal|6|N-OUT|7

    3Power output neutral wire terminal| |3|⑩

    E1|Filtering board ground wire terminal|7|L-OUT|6 ⑩Power output live wire terminal| |4|E2|8Filtering board grounding hole (reserved)|4|4|4|

    Page 22

    ![image 16](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile16.png)

    1

    2

  • 6
  • 3

    ⑩4 ⑩

    Model: AUH4860ZGDA

    9 8

    7

    6

  • 3
  • 4
  • 5

    21

    Page 23

    |No.|Printing|Interface No.|Interface No.|Printing|Interface| |---|---|---|---|---|---| |1|AC-L|Power input live wire terminal|6|N-OUT1|Power output neutral wire terminal (reserved)| |2|N|Power input neutral wire terminal|7|N-OUT|Power output neutral wire terminal| |3|E|Filtering board ground wire terminal|8|L-OUT1|Power output live wire terminal| |4|E1|Filtering board grounding hole (reserved)|9|L-OUT|Power output live wire terminal| |5|DC-BUS|Power discharge terminal (for testing)| | | |

    ##### IPM, PFC Testing Method Method of Testing IPM Module

    • Turn off power to the outdoor unit for at least one minute. Set a multi meter to diode test function.

    Remove the U, V and W wires from the compressor. Testing Steps

  • 1. Place the black meter lead on the “P” terminal and place the red meter lead on U, V and W respectively to measure voltage between UP, VP and WP.
  • 2. Please the red meter lead on the “N” terminal and the black meter lead on U, V, and W respectively to measure voltage between NU, NV and NW.
  • 3. A good IPM board is indicated by reading 0.3 to 0.7 volts between UP, VP, WP, NU, NV and NW.
  • 4. A bad board is indicated by a zero reading in any of the measurements.
  • ######### Method of Testing PFC Module Short Circuit

    • Turn off power to the outdoor unit and wait at least one minute. Set a multi meter to diode test. Remove

    wires from L1-2, and L2-1. Testing Steps:

  • 1. Place the black lead on terminal P and the read lead on terminal L1-2 and L2-1 respectively. Measure the voltages between L1-2 and P; L2-1 and P.
  • 2. Place the red lead on terminal N and the black lead on L1-2 and L2-1 respectively. Measure the voltage between N and L1-2 and N and L2-1.
  • 3. Voltages between 0.3 and 0.7 volts indicate a normal PFC module. Any zero volt measurement indicates a failed module.
  • ########### AUH2436ZGDAA

    ![image 17](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile17.png)

    Page 24

    ########### AUH4860ZGDAA

    ![image 18](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile18.png)

    ##### Error Codes

    |No.|Error code|Error| |---|---|---| |1|E1|Compressor high pressure protection| |2|E3|Compressor low pressure protection| |3|E4|Compressor air discharge high-temperature protection| |4|F2|Condenser temperature sensor error| |5|F3|Outdoor ambient temperature sensor error| |6|F4|Discharge temperature sensor error| |7|F6|ODU tube temperature sensor error| |8|EE|ODU memory chip error| |9|H4|Overload| |10|H5|IPM protection| |11|H6|DC fan error| |12|H7|Driver out-of-step protection| |13|HC|PFC protection| |14|Lc|Startup failure| |15|P0|Driver reset protection| |16|P5|Over-current protection| |17|P6|Master control and driver communication error| |18|P7|Driver module sensor error| |19|P8|Driver module high temperature protection| |20|PA|AC current protection| |21|Pc|Driver current error| |22|PL|Bus low-voltage protection| |23|PH|Bus high-voltage protection| |24|PU|Charge loop error| |25|ee|Drive memory chip error| |26|e1|High pressure sensor error| |27|C4|ODU jumper cap error|

    Page 25

    ##### Troubleshooting

    ######## Start

    |“E1” Compressor High Pressure Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    It is judged through the action of high pressure switch. If the high pressure switch is cut off, it is judged that high pressure is too high and the system stops operation for protection.| |Possible causes:

    • Cut-off valve of ODU is not fully opened
    • High pressure switch is abnormal
    • Outdoor or indoor fan is not working properly
    • IDU filter or air duct is blocked (heating mode)
    • Ambient temperature is too high
    • System is overcharged
    • Refrigerant line set is blocked
    |

    E1 protection

    Check if the system high pressure is higher than 667psi

    Yes No

    Check if the liquid valve and gas valve of outdoor unit open completely

    Check if the wiring of high pressure switch is correct

    No

    Yes

    NoYes

    |Reconnect wire according to the circuit diagram| |---|

    |Completely open the liquid valve and gas valve of outdoor unit| |---|

    Page 26

    Check if the high pressure switch works normally

    Check if the air outlet of outdoor fan motor or indoor fan motor is normal

    No

    Yes

    No

    Yes

    |Replace the high pressure switch| |---|

    |Clear the obstacle at indoor and outdoor air outlet or air return port to ensure smooth air outlet| |---|

    Check if the indoor and outdoor operating ambient temperature is within normal range

    |Replace the outdoor main board| |---|

    |Operate the unit in normal ambient temperature range specified in user’s manual| |---|

    ######## Start

    |“E3” Compressor LowPressure Protection, Refrigerant Undercharge Protection, Refrigerant Recovery Mode| |---| |Error display: ODU main board LED display|

    Page 27

    |Error judgment condition and method:

    It is judged through the action of low pressure switch. If the low pressure switch is cut off, it is judged that low pressure is too low and the system stops operation for protection.| |Possible causes:

    • Service valve of ODU is not fully opened
    • Low pressure sensor is abnormal
    • Outdoor or indoor fan is not working properly
    • IDU filter or air duct is blocked (cooling mode)
    • Ambient temperature is too low
    • System is undercharged
    • Refrigerant line set is blocked
    |

    E3 protection

    Check if the system low pressure is lower than 7psi

    |Y|es No

    | |---|---| | | |

    Check if the liquid valve and gas valve of outdoor unit open completely

    Charge refrigerant according to the requirement and then turn on the unit to see if E3 protection still occurs

    NoYes

    Yes

    |Completely open the liquid valve and gas valve of outdoor unit| |---|

    Check if there is leakage in the pipeline

    Check if the low pressure

    switch and its wiring are normal

    Yes

    No

    Yes

    Page 28

    |Weld the leakage point and recharge refrigerant after vacuum pumping and pressure retaining are passed| |---|

    |Reconnect wire according to the circuit diagram or replace the pressure switch| |---|

    |Replace the outdoor main control board| |---|

    ######## Start

    |“E4” Compressor Air Discharge HighTemperature Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Test the compressor discharge temperature through compressor discharge pipe and compressor shell top temperature sensor. If the tested temperature value is higher than 239°F, the unit will stop for protection.| |Possible causes:

    • Service valve of ODU is not fully opened
    • Electronic expansion valve is abnormal
    • Outdoor or indoor fan is not working properly
    • IDU filter or air duct is blocked (cooling mode)
    • Ambient temperature exceeds allowable operation range
    • System is under charged
    • Refrigerant lines are blocked
    |

    E4 Compressor air discharge high temperature protection

    Confirm the specific outdoor unit protection module and compressor

    Restart the unit and check if the discharge temperature of the failing compressor is equal to or higher than 239°F

    Yes No

    Is the discharge temperature sensors resistance normal?

    Check if the electronic expansion valve of the subcooler is connected to the main board correctly

    Yes

    Page 29

    No

    |Replace the temperature sensor| |---|

    No

    |Replace the main board of the outdoor unit| |---|

    Yes

    Does the indoor units capacity match that of the outdoor unit?

    |Reconnect the electronic expansion valve of the subccoler| |---|

    No

    Yes

    Does the environmental temperature of the exceed the permitted scope of temperature of the unit

    |Check rating capacities of the indoor and outdoor units again| |---|

    No

    Yes

    |1.Check the systems

    refrigerant pipe for any leak and add refrigerant

    2.Check if the pipeline is jammed
    | |---|

    Page 30

    |Check rating capacities of the indoor and outdoor units again| |---|

    |“F2” Condenser Temperature Sensor Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value, If the sampling AD value exceeds upper limit and lower limit in 5 seconds continuously, report the error.| |Possible causes:

    • Poor contact between temperature sensor and terminal in main board interface
    • Temperature sensor is abnormal
    • Detecting circuit is abnormal
    |

    Malfunction of outdoor coil temperature sensor

    Check if the condenser temperature sensor on main board is inserted on the socket correctly

    Yes

    No

    |Correctly insert the temperature sensor on the socket| |---|

    Disconnect the temperature sensor and measure if its resistance is normal

    Note: Please refer to Appendix 1 for the relation between temperature and resistance of temperature sensor.

    Yes

    No

    |Replace the outdoor main board| |---|

    Page 31

    |Replace the temperature sensor| |---|

    Start

    |“F3” Outdoor Ambient Temperature Sensor Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value, If the sampling AD value exceeds upper limit and lower limit in 5 seconds continuously, report the error.| |Possible causes:

    • Poor contact between ambient temperature sensor and terminal in main board interface
    • Ambient temperature sensor is abnormal
    • Detecting circuit is abnormal
    |

    F3 Outdoor ambient temperature sensor error

    Is the terminal between main board and temperature sensor loose or any foreign objects inside the terminal?

    Yes

    No

    |If it is loosened or there are foreign objects, retighten it after treatment.| |---|

    Inspect if the temperature sensor is abnormal

    |Y|N

    es|o| |---|---|---| | | |o|

    Note: Please refer to Appendix 1 for the relation between temperature and resistance of temperature sensor.

    |Replace the temperature sensor|

    Page 32

    |---|

    Inspect if the detecting circuit is abnormal

    Yes

    |Replace the main control board| |---|

    |“F4” Discharge Temperature Sensor Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value, If the sampling AD value exceeds upper limit and lower limit in 5 seconds continuously, report the error.| |Possible causes:

    • Poor contact between temperature sensor and terminal in main board interface
    • Temperature sensor is abnormal
    • Detecting circuit is abnormal
    |

    Malfunction of discharge temperature sensor

    Check if the discharge temperature sensor on main board is inserted on the socket correctly

    Yes

    No

    |Correctly insert the temperature sensor on the socket| |---|

    Disconnect the temperature sensor and measure if its resistance is normal

    Yes

    Note: Please refer to Appendix 1 for the relation between temperature and resistance of temperature sensor.

    Page 33

    No

    |Replace the outdoor main board| |---|

    |Replace the temperature sensor| |---|

    Start

    |“F6” ODU Tube Temperature Sensor Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge the range of AD value, If the sampling AD value exceeds upper limit and lower limit in 5 seconds continuously, report the error.| |Possible causes:

    • Poor contact between temperature sensor and terminal in main board interface
    • Temperature sensor is abnormal
    • Detecting circuit is abnormal
    |

    Malfunction of tube temperature sensor

    Check if the tube temperature sensor on main board is inserted on the socket correctly

    Yes

    No

    |Correctly insert the temperature sensor on the socket| |---|

    Disconnect the temperature sensor and measure if its resistance is normal

    Note: Please refer to Appendix 1 for the relation between temperature and resistance of temperature sensor.

    Yes

    Page 34

    No

    |Replace the outdoor main board| |---|

    |Replace the temperature sensor| |---|

    |“EE” ODU Memory Chip Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    If ODU main board cannot read the memory chip, this error will be reported.| |Possible causes:

    • Memory chip on the ODU main board is damaged.
    • Memory chip is weakly soldered.
    • Memory chip lead is short-circuited.
    |

    Malfunction of ODU memory chip error

    |Replace the outdoor main board| |---|

    ######## Start

    |“H4” Overload| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    When condensing pressure is higher than the protection value, system will report overload protection.| |Possible causes:

    • Cooling ODU heat exchanger is blocked or heat exchange is bad.
    • Heating IDU heat exchanger is blocked or heat exchange is bad.
    • Operating temperature is too high.
    • System is over charged
    |

  • H4 Overload
  • Page 35

    Outdoor coil is blocked

    Yes No

    |Remove the obstacle| |---|

    Indoor coil is blocked

    Yes

    No

    Ambient temperature is out of the operation range

    |Remove the obstacle| |---|

    |Y|N

    es|o| |---|---|---| | | |o|

    |Normal protection. No need to handle it.| |---|

    System is over charged

    |Y|N

    es|o| |---|---|---| | | |o|

    Page 36

    |Release a proper amount of refrigerant| |---|

    Replace the drive board

    |Replace the compressor| |---|

    Error still exists?

    Yes

    |“H5” IPM Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Drive processor supply voltage is low. IPM module malfunction. System will shut down.| |Possible causes:

    • Compressor 3-phase wire connection has open phase or is phase-reversed.
    • System is overloaded and compressor current is too high.
    • Drive board IPM module is damaged.
    • Drive board IPM module’s 15V power supply is lower than 13.5V.
    • Drive board 6-line PWM signal and the corresponding element are abnormal.
    • Drive board compressor current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal.
    • Compressor is damaged.
    |

  • H5 IPM protection
  • Compressor 3-phase wire connection is phase reversed or has open phase.

    Yes No

    |Connect wires according to the phase sequence.| |---|

    System is heavy loaded? Compressor current is too high?

    Yes

    Page 37

    No

    Replace the drive board

    |Normal protection| |---|

    Error still exists?

    Yes

    |Replace the compressor| |---|

    ######## Start

    |“H6” DC Fan Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Main board does not receive the outdoor fan signal within 30 seconds after outdoor fan run call is initiated| |Possible causes:

    • Outdoor fan wiring terminal is not correctly connected to the main board.
    • Outdoor fan is damaged.
    • Outdoor fan software is incorrect. This can occur after the outdoor fan has been replaced.
    |

    Malfunction of discharge temperature sensor

    Check if the control wire of outdoor fan motor is connected on the outdoor main board correctly

    Yes No

    |Correctly connect the control wire of fan motor on the main board| |---|

    Replace the outdoor fan motor and then restart the unit to see if there still is malfunction of outdoor fan motor

    Page 38

    NoYes

    |Replace the outdoor main board| |---|

    |Operate the unit with the new motor| |---|

    |“H7” Driver Out-of-Step Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    The processor cannot detect the compressor rotor position. The running speed is different that the speed called for. Either case will stop compressor operation.| |Possible causes:

    • Compressor 3-phase wire connection is out of phase or phase-reversed.
    • Compressor wiring is out of phase.
    • System is blocked, short of refrigerant or compressor oil.
    • Drive board IPM module is damaged.
    • Drive board compressor current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal.
    • Compressor is damaged.
    |

    Start

    H7 Compressor out-of-step protection

    Compressor 3-phase wire connection is lack of phase or phased-reversing?

    Yes

    No

    |Connect wires according to the phase sequence| |---|

    Compressor phase wire connection is bad?

    Yes

    Page 39

    No

    Replace the drive board

    |Fasten or replace the compressor phase wires| |---|

    Error still exists?

    Yes

    |Replace the compressor| |---|

    |“HC” PFC Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    System shutdown due to drive processor low voltage malfunction.| |Possible causes:

    • Power grid voltage is abnormal.
    • Drive board PFC module is damaged.
    • Drive board IPM module’s 15V power supply is lower than 13.5V.
    • Drive board PWM signal for PFC and the corresponding element are abnormal.
    • Drive board PFC current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal.
    |

    Start

    GC PFC protection

    Check whether power grid voltage is normal?

    Yes

    No

    |Normal protection| |---|

    Page 40

    Drive board PFC is damaged ?

    Yes

    |Replace the drive board.| |---|

    |“Lc” Startup Failure| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Check the error code on 7 segment LED display of ODU main control board. Inverter compressor startup failure is indicated by a PJ on the display.| |Possible causes:

    • Poor contact of compressor U, V, W wire
    • Compressor is faulty
    • Compressor drive board is faulty
    |

    LC Startup failure

    System is blocked?

    |Y|es No| |---|---| | | |

    |Eliminate system

    failure| |---|

    Short of refrigerant? Short of compressor oil?

    |Y|N

    es|o| |---|---|---| | | |o|

    Page 41

    |Fill refrigerant in. Fill compressor oil in.| |---|

    Compressor 3-phase sequence is correct or not?

    |Y|N

    es|o| |---|---|---| | | |o|

    |Connect wires according to the correct sequence.| |---|

    Compressor 3-phase wires are loose or badly connected?

    |Y|N

    es|o| |---|---|---| | | |o|

    |Reconnect wires or replace the compressor wires| |---|

    Replace the drive board

    |Replace the compressor| |---|

    Error still exists?

    Yes

    Page 42

    |“P0” Driver Reset Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Drive board chip resets and starts initialization. After the drive board is energized for 5s, it detects that the chip resets again. In this case, it can be judged as drive chip reset protection.| |Possible causes:

    • 3.3V drive chip supply voltage drop.
    • TRST lead of JTAG programming is interrupted.
    |

    Start

    P0 Driver reset protection

    3.3V drive board voltage is normal or not?

    |Y|es No

    | |---|---| | | |

    |Re-arrange the wires. Heavy current wires should avoid the drive board chip.| |---|

    |Replace the drive board| |---|

    ######## Start

    |“P5” Over-Current Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    If compressor’s instant current value is higher than the set current protection value. it will be judged that compressor over-current occurs and system will shut down for protection.| |Possible causes:

    • System load is too much and compressor current is too large.
    • Compressor 3-phase wire connection is out of phase.
    • Compressor wire is loose or has bad contact.
    • Drive board current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal.
    • Compressor is damaged.
    |

    PS Compressor over-current protection

    Page 43

    Compressor is running at high frequency and high load. The peak currant has reached the protection value?

    Yes No

    |Normal protection| |---|

    Compressor 3-phase wire connection is correct or not?

    Yes

    No

    |Reconnnect wires according to the correct sequence.| |---|

    Compressor 3-phase wires are loose or badly connected?

    No

    Yes

    |Reconnect wires or replace the compressor wires.| |---|

    Replace the drive board

    |Replace the compressor| |---|

    Error still exists?

    Page 44

    Yes

    ####### ENGLISH

    |“P6” Master Control and Driver Communication Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    If there is no other malfunction and the communication between master control and driver is cut off for 30s, then it can be judged that the communication between master control and driver is faulted. System will shut down for protection.| |Possible causes:

    • Communication wire between master control and driver is not well connected, or has bad contact, or is broken.
    • The switch power of drive board is abnormal, therefore, the 3.3V power voltage is abnormal.
    • Communication circuit of the drive board or the master control board is abnormal.
    |

    ######## Start

    P6 Master control and driver communication error

    The communication wire between master control and driver is not connected, or is badly connected, or broken?

    Yes No

    |Reconnect or replace the communication wire.| |---|

    Replace the drive board

    Error still exists?

    Yes

    |Replace the master control board.| |---|

    |“P7” Driver Module Sensor Error| |---|

    Page 45

    |Error display: ODU main board LED display| |Error judgment condition and method:

    If IPM or PFC module temperature is lower than the set protection value, then it can be judged that driver module sensor error occurs and system will shut down for protection.| |Possible causes:

    • Module temperature sensor is short-circuited or open.
    • Drive board current sampling circuit element is damaged or drive chip current sampling AD terminal is abnormal.
    |

    ######## Start

    P7 Driver module sensor error

    |Replace the drive board| |---|

    ######## Start

    |“P8” Driver Module High Temperature Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    If IPM module temperature or PFC module temperature exceeds the set protection value, then it can be judged that driver module temperature is too high and system will shut down for protection.| |Possible causes:

    • Thermal grease is not applied or not evenly applied to the module, or there is other substance on the back of the module.
    • The module securing screws are not tight.
    • Drive board temperature sampling circuit element is damaged or drive chip temperature sampling AD terminal is abnormal.
    |

    PB Driver module high temperature protection

    Thermal grease is not applied or not evenly applied to the module? Is there foreign matter on the back of the module?

    Yes No

    |Apply the thermal grease evenly. Remove the foreign matter.| |---|

    The module securing screws are not tightened?

    |Y|N

    es|o| |---|---|---|

    Page 46

    | | |o|

    |Replace the drive board| |---|

    |Tighten the screws| |---|

    |“PA” AC Current Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    If input current value exceeds the set protection value, then it can be judged that AC current protection occurs and system will shut down for protection.| |Possible causes:

    • System is heavy-loaded and compressor current is too large.
    • Grid voltage is abnormal.
    • PFC module is damaged.
    • Drive board PFC current sampling circuit element is damaged or drive chip PFC current sampling AD terminal is abnormal.
    |

    ######## Start

    PA AC current protection

    Grid voltage is normal or not ?

    Yes No

    |Normal protection| |---|

    Compressor is running at high frequency and high load?

    |Y|N

    es|o| |---|---|---| | | |o|

    Page 47

    |Replace the drive board| |---|

    |Normal protection| |---|

    |“Pc” Driver Current Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    After power charging, if offset voltage average is detected to exceed 12.5% of 1.65V in 1s, then it can be judged that current detection (or current sensor) circuit is faulted. System will shut down for protection.| |Possible causes:

    • Current detection (or current sensor) sampling circuit element is abnormal.
    • Drive chip compressor current sampling AD terminal is badly welded or short-circuited.
    |

    ######## Start

    PC Current detection (or current sensor) circuit error

    |Replace the drive board| |---|

    |“PL” Bus Low-Voltage Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    When compressor is running and there is no other malfunction, if busbar voltage is lower than the set value for low voltage protection, then it can be judged that bus low-voltage protection occurs. System will shut down for protection.| |Possible causes:

    • Voltage of power grid is abnormal.
    • Drive board busbar voltage sampling circuit element is damaged or drive board busbar voltage sampling AD terminal is abnormal.
    |

    ######## Start

    PL Bus low-voltage protection

    Grid voltage is normal or not?

    Page 48

    Yes No

    |Replace the drive board.| |---|

    |Normal protection| |---|

    |“PH” Bus High-Voltage Protection| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    If there is no other malfunction and the busbar voltage is higher than the set value for high voltage protection, then it can be judged that bus high-voltage protection occurs. System will shut down for protection.| |Possible causes:

    • Voltage of power grid is abnormal.
    • Drive board busbar voltage sampling circuit element is damaged or drive board busbar voltage sampling AD terminal is abnormal.
    |

    Start

    PH Bus low-voltage protection

    Grid voltage is normal or not?

    Yes

    No

    |Replace the drive board.| |---|

    |Normal protection| |---|

    Page 49

    |“PU” Charge Loop Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    When the charge loop begins to charge and the busbar voltage cannot reach the set value in a certain period of time, it can be judged that charge loop error exists. System will shut down for protection.| |Possible causes:

    • Voltage of power grid is abnormal. Voltage is too low.
    • Drive board charge loop element is abnormal.
    • Drive board busbar voltage sampling circuit element is damaged or drive chip busbar voltage sampling AD terminal is abnormal.
    |

    Start

    PU Charge loop error

    Grid voltage is too low?

    Yes

    No

    |Replace the drive board.| |---|

    |Normal protection| |---|

    |“ee” Drive Memory Chip Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    If power is connected but the drive board and the memory chip cannot detect the memory chip or read the memory chip data correctly, then it can be judged that drive memory chip error exists.| |Possible causes:

    • The drive board that needs memory chip is not installed with the memory chip.
    • The lead or connector of memory chip is badly welded or short-circuited.
    |

    Start

    ee Drive memory chip error

    Page 50

    Drive board is installed with memory chip or not?

    |Y|es No

    | |---|---| | | |

    |Install the memory chip.| |---|

    |Replace the drive board.| |---|

    ######## Start

    |“e1” High Pressure Sensor Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    Sample the AD value of pressure sensor through pressure sensor detecting circuit and judge the range of AD value, If the sampling AD value exceeds upper limit and lower limit in 30 seconds continuously, report the error.| |Possible causes:

    • Poor contact between pressure sensor and terminal in main board interface
    • Pressure sensor is abnormal
    • Detecting circuit is abnormal
    |

    High pressure sensor error

    Check if the high pressure sensor on main board is inserted on the socket correctly

    Yes No

    |Correctly insert the pressure sensor on the socket| |---|

    Measure the pressure sensor if its AD value is normal

    Page 51

    No

    Yes

    |Replace the outdoor main board| |---|

    |Replace the high pressure sensor| |---|

    |“C4” ODU Jumper Cap Error| |---| |Error display: ODU main board LED display| |Error judgment condition and method:

    If jumper cap model doesn‘t match with main board, report the error| |Possible causes:

    • Jumper cap is not installed
    • Jumper cap model is wrong
    • Detecting circuit is abnormal
    |

    ######## Start

    C4 ODU jumper cap error

    Find out JUMP printing on the main board to see if the jumper cap is installed at this place

    Yes

    No

    |Install the jumper cap| |---|

    Check if the jumper model is correct

    No

    Page 52

    Yes

    |Inspect if the detecting circuit is abnormal|Inspect if the detecting circuit is abnormal| |---|---| |Y|s|

    |Replace the jumper cap with correct model| |---|

    |Replace the main control board| |---|

    Failures Not Caused by Errors If your heat pump fails to function normally, please first check the following items before contacting service:

    |Problem|Cause|Corrective measure| |---|---|---| |The heat pump doesn’t run|The compressor is protected by a 3 minute time-delay.|Please wait for time delay protection.| |The heat pump doesn’t run|Wire connection is wrong.|Connect wires according to the wiring diagram.| |The heat pump doesn’t run|Fuse or circuit breaker is broken|Replace the fuse or switch on the circuit breaker.| |The heat pump doesn’t run|Power failure.|Restart after power is resumed.| |The heat pump doesn’t run|Power plug is loose.|Re-insert the power plug.| |The heat pump doesn’t run|Thermostat has weak battery.|Replace the batteries.| |Bad cooling or heating effect.|Air inlet and outlet of the units have been blocked.|Clear the obstacles and keep the room for the units well ventilated.| |Bad cooling or heating effect.|Improper temperature setting|Select a proper temperature.| |Bad cooling or heating effect.|Fan speed is too low.|Select a proper fan speed.| |Bad cooling or heating effect.|Air flow direction is not right.|Change the direction of air louvers.| |Bad cooling or heating effect.|Doors or windows are open.|Close them.| |Bad cooling or heating effect.|Exposed under direct sunshine.|Draw curtains or louvers in front of the windows.| |Bad cooling or heating effect.|Too many heat sources in the room.|Remove unnecessary heat sources.| |Bad cooling or heating effect.|Filter is blocked or dirty.|Send for a professional to clean the filter.| |Bad cooling or heating effect.|Air inlets or outlets of the units are blocked.|Clear away obstacles that are blocking the air inlets and outlets of the units.|

    Page 53

    The following situations are not operation failures:

    |Problem|Time of occurrence|Cause| |---|---|---| |Mist comes from the heat pump.|During operation.|If the unit is running under high humidity conditions, the air in the room will condense.| |The heat pump generates excessive noise.|System switches to heating mode after defrosting.|Defrosting process will generate some water, which will turn to water vapor.| |The heat pump generates excessive noise.|The heat pump is buzzing at the beginning of operation.|Thermostat will be buzzing when it starts working. The noise will become weak 1 min later.| |Dust comes from the heat pump.|When the unit is turned on, it purrs.|When the system is just started, the refrigerant is not stable. About 30s later, the purr of the unit will dissipate.| |Dust comes from the heat pump.|About 20s after the unit first enables the heating mode or there is refrigerant brushing sound when defrosting under heating.|It’s the sound of 4-way valve switching direction. The sound will disappear after the valve changes its direction.| |Dust comes from the heat pump.|There is hissing sound when the unit is started or stopped and a slight hissing sound during and after operation.|It’s the sound of gaseous refrigerant that stops flowing and the sound of drainage system.| |Dust comes from the heat pump.|There is a sound of crunching during and after operation.|Because of temperature change, front panel and other components may be expanding and contracting.| |Dust comes from the heat pump.|There is a hissing sound when the unit is turned on or suddenly stopped during operation or after defrosting.|Because refrigerant suddenly stops flowing or changes the flow direction.| |Dust comes from the heat pump.|The unit starts operation after being unused for a long time.|Dust inside the units come out together with the air.| |The heat pump generates some smell.|During operation.|The room smell or the smell of cigarette comes out through the units|

    NOTICE: • Check the above items and adopt the corresponding corrective measures. If theheat pump continues to function poorly, please stop the heat pump immediately and

    contact a local service contractor.

    System Diagram

    ![image 19](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile19.png)

    System Evacuation

    NOTICE:

  • • Make sure the outlet of vacuum pump is away from fire source and is well-ventilated.
  • • Before evacuating, make sure the unit cut-off valves are closed.
  • • When evacuating, both the liquid pipe and the gas pipe must be evacuated.
  • 1. Remove the caps of the liquid valve, gas valve and also the service port.
  • 2. Meanwhile the gas and liquid valves should be kept closed in case of refrigerant leak.
  • Page 54

  • 3. Connect the hose used for evacuation to the vacuum pump.
  • 4. Open the switch at the lower pressure side of the manifold valve assembly and start the vacuum pump. Meanwhile, the switch at the high pressure side of the manifold valve assembly should be kept closed, otherwise evacuation would fail.
  • 5. The evacuation duration depends on the unit’s capacity, generally:
  • Verify if the pressure gauge at the low pressure side of the manifold valve assembly reads 350 microns, if not, it indicates there is leak somewhere. Then, close the valves fully and then stop the vacuum pump.

  • 6. Wait for 10min to see if the system pressure can remain unchanged. If the pressure increase, there may be leakage.
  • |Model|Time(min)| |---|---| |AUH2436ZGDA|35| |AUH4860ZGDA|40|

  • 7. Slightly open the liquid valve and let some refrigerant go to the connection pipe to balance the pressure inside and outside of the connection pipe, so that air will not come into the connection pipe when removing the hose. Notice that the gas and liquid valve can be opened fully only after the manifold valve assembly is removed.
  • 8. Replace back the caps of the liquid valve, gas valve and also the service ports.
  • ![image 20](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile20.png)

  • • For large-size units, there are maintenance ports for liquid valve and gas valve. During evacuation, you may connect the two hoses of the manifold gauges to the maintenance ports to speed up the evacuation.
  • • Refrigerant should be reclaimed into the appropriate storage tank. System should use oxygen-free nitrogen purging to ensure safety. This process may need to repeat several times. Do not use compressed air or oxygen in this process.
  • NOTICE:

    ##### Refrigerant Charging Pre-Charging

  • 1. Connect the high pressure gauge line to the liquid service valve and connect the low pressure gauge line to the vapor line valve. Connect the middle gauge line to the vacuum pump. Power on the vacuum pump and evacuate the system.
  • 2. After evacuation, close the high and low pressure gauge valves and remove the middle gauge line from the connector of vacuum pump and connect the refrigerant tank.
  • 3. Loosen the middle gauge line from the connector and slightly open the refrigerant tank valve. Purge the middle gauge line. Tighten up the connector again and completely open the valve of refrigerant tank at the same time.
  • 4. Keep the refrigerant tank erect and put it on an electronic scale. Zero the scale.
  • ![image 21](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile21.png)

    Page 55

  • 5. Open the high pressure gauge valve (Keep the low pressure gauge valve closed). Then charge refrigerant into the system.
  • 6. Add the required amount of refrigerant calculated and close off the manifold gauge when complete.
  • 7. If you can’t continue to charge refrigerant into the system and the quantity of charged refrigerant is less than the required charging quantity, then restart the system and add the remainder of the required refrigerant into the vapor line while the system is running.
  • 8. After charging, remove the pressure gauge.
  • ######### Refrigerant Charging When Unit is Running

  • 1. Connect the low pressure gauge line to the vapor line service valve and connect the high pressure gauge line to the service valve. Connect the middle gauge line to the vacuum pump. Power on the vacuum pump and evacuate the system.
  • 2. After evacuation, close the high and low pressure gauge valves. Then remove the middle gauge line from the connector of vacuum pump and connect the refrigerant tank.
  • 3. Purge the center hose.
  • 4. Turn on the heat pump and let it run for a while.
  • 5. Open the low pressure gauge valve (Keep the high pressure gauge valve closed) and charge add the remaining required refrigerant.
  • 6. After all required refrigerant is charged in, close the valve of refrigerant tank.
  • 7. Remove the pressure gauge to finish the refrigerant charging work.
  • Procedure of Refrigerant Charging Following is the supplementary requirement for refrigerant charging on the basis of normal procedure:

  • 1. Make sure that when charging refrigerant into the system, no other types of refrigerant will be mixed. The pipeline for refrigerant charging should be as short as possible to reduce the amount of refrigerant left in it.
  • 2. The refrigerant tank should stand erect.
  • 3. Make sure the refrigerating system is already grounded before refrigerant charging.
  • 4. When charging is completed (or not yet completed), stick a label on the system.
  • 5. Perform a final refrigerant leak test before leaving the work site.
  • ##### Maintenance of Major Components

    Replacement of Thermostat Please refer to the instruction manual for your thermostat.

    How to Replace the Compressor Diagnosis of Compressor Failure: On Condition that the Unit CAN be Started Up

  • 1. Start the unit if it will run and check the current of the faulted compressor. Use manifold gauges to measure the discharge and suction pressures at the service valves. Refer to the following table based on the recommended working current. The electric current of an inverter compressor will be different under different rotation speed or different working conditions. If the compressor is working at 60Hz, the working current corresponding to different condensing temperature and evaporating temperature is shown below:
  • Inverter compressor QXFT-F310zN450

    Page 56

  • 2. Judge whether the operating noise of the compressor is normal, and whether there is a sharp noise or obvious scraping. If there is a normal compressor working nearby, compare their operating noises.
  • 3. Examine whether the electronic expansion valve of the outdoor unit is active and whether the 4-way valve works or not. How to examine:
  • ![image 22](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile22.png)

    ########### I. Electronic Expansion Valve:

    The electronic expansion valve will be reset every time when the unit is powered on or off. Touch the valve and you can feel the movement of the valve spool. In the last stage of the reset process, you will hear the click of the valve and feel its vibration.

    Electronic expansion

    Touch the electronic expansion valve:

  • a. Touch the top of the electronic expansion valve and you can feel its move as it is reset upon startup.
  • b. Make sure the coil is fixed firmly.
  • ![image 23](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile23.png)

    Electronic expansion

    ########### II. 4-way Valve:

    During normal operation, the 4 copper tubes that connect to the valve will have different temperatures. When the 4-way valve is working, it will generate some noise and vibration.

    ![image 24](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile24.png)

    This is the position of the 4-way valve. Do not touch it directly with your hands. There is hot refrigerant at the discharge pipe, so be careful not to be scalded.

    ![image 25](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile25.png)

    Labels on the 4-way valve: D-connect to the discharge side; E-connect to the evaporator of indoor unit; S-connect to the suction side of the liquid separator; C-connect to the outdoor coil. When the system is in cooling mode, C-the pipeline is with high pressure and high temperature; E, S-the pipeline is with low pressure and low temperature. When the system is in heating mode, E-the pipeline is with high pressure and high temperature; C, S-the pipeline is with low pressure and low temperature; Because D is connected to the discharge side, it is with high pressure and high temperature regardless of the operating mode. When the unit is powered on, in defrosting or oil return mode, the 4-way valve will produce some noise. Do not touch the pipes directly with your hands and be aware of the hot temperature.

    D- Connect to the exhaust side Caution! High temperature!

    Page 57

  • 4. Check the drive board of compressor, i.e. the IPM module. Please refer to the IPM checking method in the section of troubleshooting. Check the drive board of compressor, i.e. the IPM module. Please refer to the IPM checking method in the section of troubleshooting.
  • Diagnosis of Compressor Failure: On Condition that the Unit CANNOT be Started Up

  • 1. Cut off the power supply and detach the cover of the wiring box of the compressor. Check the wiring connections of the compressor.
  • 2. Check the resistance between the wiring terminals (U, V, W) of compressor.
  • Refer to the following table for the resistance between any two terminals:

    |Compressor model|UV Winding Resistance|VW Winding Resistance|WU Winding Resistance| |---|---|---|---| |QXFT-F310zN450|0.79±7%Ω|0.79±7%Ω|0.79±7%Ω| |QXAU-F516zX440A|0.79±7%Ω|0.79±7%Ω|0.79±7%Ω|

    Measure the resistance to ground of each wiring terminal. The resistance should be above 10 megohm. If not, we can judge that the compressor windings are grounded.

  • 3. On condition that the unit cannot be started up; we also need to check the solenoid valve assembly of the system including the electronic expansion valve. The checking method is the same as instructed above.
  • 4. Check whether the IPM module is normal. Please refer to the IPM checking method in the section of troubleshooting.
  • ![image 26](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile26.png)

    Use a multimeter to measure the resistance between two terminals

    Measure the resistance to ground of the three terminals respectively

    ######### Replacement of Compressor

    ########### 1. Preparation

  • A. Prepare the components for replacement:
  • • Do not carry the compressors horizontally or upside down when carrying the compressors. Make sure the lubricant inside the compressor doesn’t pour out from the oil refrigerant ports. The suction and discharge openings of the compressor must be sealed. Use tape for the openings if the rubber plugs are not available.

    Page 58

    NOTICE:

  • • Before replacement, make sure the nameplates and models of the compressors are identical.
  • • Make sure the lubricant is sealed inside the compressors.
  • B. Prepare relevant tools:
  • ![image 27](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile27.png)

    Make sure terminal box cover of the compressor is in good condition.

    Make sure the rubber seals of the suction and discharge openings of the compressor are in good condition.

  • • Prepare nitrogen. Please strictly follow the nitrogen welding standards during the welding process. Make sure there is sufficient nitrogen. The nitrogen pressure should be above 2” to 3” W.C.
  • • Prepare brazing rods. Common brazing rod contains less than 5% silver. This material is used for brazing copper to copper. The refrigerant ports of our compressor are made from copper-plated steel, so we must use 15% brazing rod.
  • • Prepare applicable welding tools. Please evaluate how much oxygen and acetylene should be used according to the current welding condition. Try to avoid repeated welding.
  • • Prepare a complete set of tools, including an internal hexagonal wrench, diagonal pliers, pincer pliers, nipper pliers, a multimeter, a pressure gauge, phillips screwdriver, straight screwdriver, more than two wrenches, insulating tape and wire ties.
  • ########### 2. Disconnect power

    • If the compressor needs to be replaced after judging as above, then switch off the outdoor unit and disconnect the power cable of the outdoor unit. Use insulating tape to wrap the power cable and put a notice card on the power switch to remind people to be cautious of electric shock.

    ########### 3. Preparation of electric components

    • When you detach the compressor wires, temperature sensors and electric heaters, mark them correspondingly for the convenience of reconnecting them.

    ########### 4. Recover refrigerant

    • Recover refrigerant from the system. Recover simultaneously from the high pressure side and low pressure side. Do not recover too quickly; otherwise large quantity of lubricant will escape from the system together with the refrigerant.

    ########### 5. Detach the compressor

    Page 59

  • • Check the condition of the damaged compressor, including its position and model.
  • • If the information of the compressor is confirmed, check the oil quality.
  • • I. If the oil is clear and impurities-free, we consider that the oil of the system is not polluted. Meanwhile, if we confirm that the valves and pipes are also normal, then we can replace the compressor only. For the removal of compressor, please refer to the section: Removal of Major Components.
  • • How to check oil quality:

  • • A. After the compressor is detached, put it on a solid surface and shake it at an angle of 30~45° to ensure that the contaminant at the bottom of the compressor can be poured out.
  • • B. Place the compressor at a position above the ground level and then pour out the oil from the suction inlet of the compressor. Collect the oil in a transparent container. The amount of oil should be over 150ml.
  • • Notes:
  • • The axial direction of the compressor should not slant at an angle larger than 20° to the horizontal plane.
  • • Prevent the compressor from falling.
  • • Put a transparent container (over 150ml in volume) under the suction port to collect the compressor oil, thus we can see the oil quality.
  • • C. Put the container of compressor lubricant in a bright location and see if there is impurity and discoloration. Sniff at the compressor lubricant. Normally, there is no pungent smell.
  • • II. If the oil is contaminated, replace the compressor and the gas-liquid separator.
  • • Note: Confirm whether the compressor needs to be replaced. The refrigerant ports of the faulted compressor must be sealed by adhesive tape as soon as the compressor is detached. Make sure the compressor is well preserved for future analysis.

    ########### 6. Check the components

  • • If the oil is contaminated, check the components of the unit, including the gas-liquid separator.
  • • Check the gas-liquid separator.
  • • When the separator is detached, check whether there are impurities inside. Testing method is listed below.
  • • Note: When pouring the liquid from the separator, make sure the discharge pipe is at the lower position. Slant at an angle not greater than 20°
  • • Use a transparent container to collect the content inside the separator. Check its color, seal it well and return it to the factory for inspection.
  • • Note: If the compressor is damaged and needs to be replaced, the gas-liquid separator should also be replaced, whether or not there are impurities in the separator or other abnormal conditions.
  • • Confirm which parts of the system should be replaced. Make sure the refrigerant ports of the damaged parts or components are sealed by adhesive tape as soon as they are detached. Keep them in the original condition for future analysis.
  • ![image 28](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile28.png)

    Page 60

  • Remove the screw bolt of the separator.
  • Remove the screw bolt of the separator.
  • Remove the separator.
  • ########### 7. Clear the pipeline

    • After confirming which parts of the system should be replaced, check the pipeline of the system. Blow through the main pipeline with nitrogen. After clearing the pipeline, if the components are not replaced immediately, seal the pipeline with adhesive tape to prevent the system from being contaminated by moisture and impurities in the air.

    ########### 8. Replace the compressor

    • For the removal of compressor, please refer to the section: Removal of Major Components.

    ########### 9. Check/Replace the gas-liquid separator

  • • Note: If a compressor is damaged and needs to be replaced, its gas-liquid separator should also be replaced. This will avoid the abnormal condition of the separator from affecting the safe and reliable operation of the system.
  • • For the removal of gas-liquid separator, please refer to the section: Removal of Major Components.
  • ########### 10. Check the system for leaks

  • • First of all, check each brazing point. Check whether the brazed joints are smooth and whether there is any obvious flaws or other abnormal condition.
  • • Next, fill high-pressure nitrogen into the system for leak detection. If it is only the outdoor unit that needs to be repaired and the indoor unit is confirmed normal, then it’s OK to charge high-pressure nitrogen into the outdoor unit only. Fill with nitrogen simultaneously from the high pressure side and low pressure side. We recommend charging the nitrogen from the both service valves at the same time. Nitrogen pressure should be greater than 150 psi. Use soapy water to check for leaks. Check the brazed joints particularly.
  • • Finally, pressurize the entire system. Fill high-pressure nitrogen into the system and maintain 300 psi. Close both service valves and maintain the pressure of indoor and outdoor units for more than 12h. If the pressure remains unchanged, then start system evacuation; otherwise, check the system for leaks again. Temperature should be considered when judging the pressure change. If temperature changes by 2OF , pressure will change by 1-1/2 psi or so.
  • ########### 11. Evacuate the system and charge refrigerant

    • Please refer to the section of maintenance: vacuum pumping and refrigerant charging.

    ########### 12. Connect electric components

    • Connect cables, compressor wires and the electric heating belt according to the signs marked before and the wiring diagram on the cover of the electric box.

    ######### How to Replace the Compressor Drive Module

    Page 61

  • 1. First, make sure that power is off. Use a multi meter to measure the voltage between L1, L2, L3, and N. to be sure the voltage is isolated. Tag the breaker to indicate that the equipment is under repair.
  • 2. Measure the voltage between DC bus P and N on the drive board of the compressor. Set the multimeter for DC voltage and measure the voltage between P and N as shown below. If the voltage is below 36V, proceed with the next step.
  • 3. Remove all the wires on the drive board of the compressor.
  • ![image 29](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile29.png)

  • 4. Remove the screws on the drive board of the compressor. The screws are located in the white circles as shown above in the picture.
  • 5. Replace with a new compressor drive board. Before replacement, apply some silica gel on the IPM module.
  • 6. Install the new compressor drive board. Tighten the screws and connect the wires correctly.
  • ##### Removal of Major Components Removal of ODU Major Components

    |Picture|Name|Function| |---|---|---| |![image 30](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile30.png)|Compressor|Through compression, the low pressure refrigerant becomes pressurized. As its pressure and temperature both rise, it becomes high pressure and high temperature refrigerant. It is the power drive of the system.| |![image 31](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile31.png)|4-way valve|It is used to change the direction of refrigerant flow for heating and cooling.| |![image 32](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile32.png)|Motor|The power drive of the fan. It enables the fan to run so as to provide air to flow across the coil and transfer heat from the coil to the air.| |![image 33](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile33.png)|Fan|It is used to provide smooth currents of air for forced convection and heat exchange of condenser and evaporator.| |![image 34](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile34.png)|Gas liquid separator|Installed at the suction side of compressor, it can separate the liquefied refrigerant from the gaseous refrigerant to make sure that only gaseous refrigerant will be drawn into the compressor. Ineffective compression or slugging phenomenon will occur if liquid refrigerant enters the compressor.|

    |Picture|Name|Function| |---|---|---| |![image 35](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile35.png)|Accumulator|Flash refrigerant from liquid to gas| |![image 36](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile36.png)|Outdoor coil|It is used to transfer partial heat of the hot flow to the cold flow so that the flow temperature can reach the specified index. It is an energy exchanging device.| |![image 37](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile37.png)|Electronic expansion valve|It is used to lower the pressure and temperature of liquefied refrigerant and adjust the flow of refrigerant entering the coil.| |![image 38](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile38.png)|Solenoid Valve|Electromagnetic valve controls increased enthalpy switch.|

    ENGLISH

    Model: AUH2436ZGDA

    Front Panel Removal Note: Be sure power is off before removing front panel.

    Page 62

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the upper cover plate.|![image 39](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile39.png)|Unscrew the screws of the upper cover plate with a screwdriver.| |2. Remove the front side plate.|![image 40](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile40.png)|Unscrew the screws of the upper and front side plate with a screwdriver.| |3. Remove the front grill.|![image 41](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile41.png)|Unscrew the screws of the front grill with a screwdriver.| |4. Remove the front panel.|![image 42](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile42.png)|Unscrew the screws that connect the front panel to the middle insulating board and screws around the front panel.|

    |Step|Picture|Work instruction| |---|---|---| |5. Remove the right side plate.|![image 43](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile43.png)|Unscrew the screws that connect the right side plate to the electric box and the screws around the right side plate.| |6. Install the right side plate|![image 44](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile44.png)|Screw up the screws around the right side plate. Be careful to handle well the clasps at the bottom of the right side plate.| |7. Install the front panel.|![image 45](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile45.png)|Install the front panel by mounting on 6 clasps on its both sides. Please note that there is one screw on the lower right side.| |8. Install the grill.|![image 46](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile46.png)|Attach the grill back in place and tighten up the screws.|

    |Step|Picture|Work instruction| |---|---|---| |9. Install the front side plate.|![image 47](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile47.png)|Fix the clasps on both sides of the plate and tighten up the screws.| |10. Install the upper cover plate.|![image 48](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile48.png)|Tighten up the screws around the upper cover plate.|

    Model: AUH2436ZGDA

    ##### Compressor/Gas Liquid Separator Removal

    Note: Make sure all refrigerant is recovered and power is isolated before removing compressor and gas liquid separator.

    |Step|Picture|Work instruction| |---|---|---| |1. Remove wires.|![image 49](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile49.png)|Loosen the securing screws of the wires with a screwdriver.

    Remove the wires. Note: When removing the wires, mark the wire terminals corresponding to their color so as to avoid misconnection.| |2. Break off the pipes that connecting to the compressor/ gas liquid separator.|![image 50](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile50.png)|Braze the pipes that are connected to the compressor/gas liquid separator.

    Then remove the pipes. Note: When welding the pipes, do not let the flame burn the other components.| |3. Loosen the compressor’s base connectors / gas liquid separator’s base nuts.|![image 51](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile51.png)|Use a wrench to twist off the compressor/gas liquid separator’s base nuts.| |4. Remove the compressor/ gas liquid separator from the chassis.|![image 52](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile52.png)|Take away the compressor/gas liquid separator and replace with a new one.

    Note: When replacing the compressor/gas liquid separator, avoid touching the nearby pipeline and components.|

    Page 63

    ##### Compressor/Gas Liquid Separator Removal

    Note: Make sure all refrigerant is recovered and power is isolated before removing compressor and gas liquid separator.

    |Step|Picture|Work instruction| |---|---|---| |5. Install the new compressor/ gas liquid separator onto the chassis.|![image 53](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile53.png)|After replacing the compressor/gas liquid separator, tighten up the base screw nuts.| |6. Connect the brazing interfaces of compressor/gas liquid separator to the pipeline.|![image 54](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile54.png)|Braze the connection pipes of compressor to connect them to the compressor.

    Note: When replacing the compressor, avoid touching the nearby pipeline and components.| |7. Connect the compressor wires.|![image 55](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile55.png)|Connect the compressor wires to the wire terminals on the top of compressor.

    Note: When connecting the wires, be sure to match the colors with the corresponding wire terminals.|

    Model: AUH2436ZGDA

    ##### 4-Way Valve Removal

    Note: Make sure refrigerant is fully recovered and power is isolated before removing the 4-way valve.

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the solenoid coil from the 4-way valve|![image 56](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile56.png)|Carefully unscrew the screws of electromagnetic coil with a screwdriver.| |2. Break off the connection pipes from the 4-way valve.|![image 57](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile57.png)|Use a torch to loosen the 4 joints on the 4-way valve and then remove the connection pipes.

    Note: When brazing the pipes, the 4-way valve should be wrapped with wet cloth for cooling. Do not let the flame burn the other components.| |3. Replace the 4-way valve and connect it to the connection pipes.|![image 58](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile58.png)|Replace the 4-way valve and then use a torch to braze the 4 joints of the 4-way valve.

    Note: When brazing the pipes, the 4-way valve should be wrapped with wet cloth for cooling. Do not let the flame burn the other components.| |4. Install the coil of 4-way valve.|![image 59](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile59.png)|Tighten the screws of the coil of 4-way valve with a screwdriver.|

    ENGLISH

    Model: AUH2436ZGDA

    ##### Fan and Motor Removal

    Note: Be sure to isolate power before removing the fan.

    |Step|Picture|Work instruction| |---|---|---|

    Page 64

    |1. Remove the grill.|![image 60](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile60.png)|Use a screwdriver to unscrew the two screws on the upper left and lower right corners.| |2. Remove the fan.|![image 61](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile61.png)|Use a wrench to remove the specialized nut and gasket of the fan. Note: Please keep the nut and gasket safe after removing them from the fan.| |3. Remove motor.|![image 62](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile62.png)|Use a screwdriver to unscrew the bolt of motor.

    Note: Motor wire should be first removed from the electric box.| |4. Install the motor.|![image 63](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile63.png)|Replace with a new motor. Then tighten up the screw bolt.|

    ##### Fan and Motor Removal

    Note: Be sure to isolate power before removing the fan.

    |Step|Picture|Work instruction| |---|---|---| |5. Install the fan.|![image 64](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile64.png)|Install the fan in place. Put on the gasket and use a wrench to secure the screw nut.

    Note: After installing the fan, turn the fan by hand to see if it can run normally. If not, please check for the reason.| |6. Install the grill.|![image 65](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile65.png)|After replacing the motor, use a screwdriver to tighten up the screw bolt that secures the motor. Arrange the wires according to the wiring diagram.|

    Model: AUH2436ZGDA

    ##### Outdoor Coil Removal

    Note: Make sure all refrigerant has been recovered and power is isolated before removing the outdoor coil.

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the panels.|![image 66](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile66.png)|Remove the upper, lower and front panels.|

    |Step|Picture|Work instruction| |---|---|---| |2. Remove the electric box.|![image 67](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile67.png)|Loosen the wire clamp at the bottom of the electric box.

    Unscrew the screws of electric box. The connection wires inside and outside the electric box should be removed.| |3. Remove motor support.|![image 68](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile68.png)|When removing the motor support, be careful to protect the components.| |4. Remove the outdoor coil.|![image 69](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile69.png)|Heat the brazed joint with a torch until the pipes separate.

    Note: When brazing the pipes, do not let the flame burn the other components. The brazing points of the outdoor coil are steel and copper brazed points. Be sure to maintain the brazing quality.| |5. Remove the outdoor coil|![image 70](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile70.png)|Loosen the securing screws of coil support. Take off the plate type heat exchanger and the support as a whole.|

    |Step|Picture|Work instruction|

    Page 65

    |---|---|---| |6. Install the new outdoor coil.|![image 71](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile71.png)|Secure the screws of coil and support. Then fix them together on the chassis.

    Install the coil by referring to the positions of entering and leaving pipes. Braze the connection pipes.

    Nitrogen welding: the pressure of nitrogen is 2” to 3” W.C.

    Note: When brazing the pipes, do not let the flame burn the other components.| |7. Secure the electric box and arrange the wires according to the requirement.|![image 72](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile72.png)|Put the electric box in place and tighten up the screws of electric box.

    Arrange and secure the wires as original.| |8. Check and open the upper|![image 73](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile73.png)|Check whether each component and connection wire is well connected.

    If everything is OK, place back the upper, left and right side panels.|

    Model: AUH2436ZGDA

    ##### Electronic Expansion Valve Removal

    Note: Recover all refrigerant and isolate power before removing the electronic expansion valve.

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the electric box.|![image 74](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile74.png)|Remove the upper, lower and front panels.

    Loosen the wire clamp at the bottom of the electric box

    Unscrew the screws of electric box. The connection wires inside and outside the electric box should be removed. When removing the electric box, be careful to protect the components.| |2. Remove the fixed block.|![image 75](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile75.png)|Remove the fixed block between the electronic expansion valve and the pipe.| |3. Remove the electronic expansion valve.|![image 76](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile76.png)|Take off the coil of electronic expansion valve.

    Loosen the connection pipe of electronic expansion valve by brazing. Then remove the connection pipe.

    Note: When brazing the pipe, do not let the flame bunt the other components.|

    ############# Note: Recover all refrigerant and isolate power before removing the electronic expansion valve.

    |Step|Picture|Work instruction| |---|---|---| |4. Take out the electronic expansion valve.|![image 77](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile77.png)|Take out the electronic expansion valve.| |5. Install the new electronic expansion valve.|![image 78](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile78.png)|Braze the connection pipe of electronic expansion valve.

    When brazing the electronic expansion valve, the valve should be wrapped with wet cloth.

    Nitrogen brazing: the pressure of nitrogen is 2” to 3” W.C.

    Note: When brazing the pipes, do not let the flame burn the other components.

    Install the coil of electronic expansion valve.| |6. Secure the electric box and arrange the wires as required.|![image 79](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile79.png)|Put the electric box back in place and tighten up the screws.

    Arrange the wires as original.|

    Note: Recover all refrigerant and isolate power before removing the electronic expansion valve.

    |Step|Picture|Work instruction| |---|---|---| |7. Check and open the upper and front panels.|![image 80](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile80.png)|Check whether each component and connection wire is well connected.

    If everything is OK, install the upper, left and right panels. Tighten up the screws.|

    Model: AUH4860ZGDA

    Page 66

    ##### Front Panel Removal

    Note: Be sure power is isolated before removing from panel.

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the upper cover plate.|![image 81](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile81.png)|Unscrew the screws of the upper cover plate with a screwdriver.| |2. Remove the front plate.|![image 82](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile82.png)|Unscrew the screws of the front plate with a screwdriver.|

    |Step|Picture|Work instruction| |---|---|---| |3. Remove the front grill.|![image 83](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile83.png)|Unscrew the screws of the front grill with a screwdriver.| |4. Remove the front panel.|![image 84](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile84.png)|Unscrew the screws that connect the front panel to the middle insulating board and screws around the front panel.| |5. Install the front panel.|![image 85](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile85.png)|Install the front panel by mounting on 6 clasps on its both sides. Please note that there is one screw on the lower right side.| |6. Install the grill.|![image 86](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile86.png)|Attach the grill back in place and tighten up the screws.|

    |Step|Picture|Work instruction| |---|---|---| |7. Remove the valve cover|![image 87](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile87.png)|Unscrew the screws of the valve cover with a screwdriver.| |8. Remove the right side plate.|![image 88](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile88.png)|Unscrew the screws that connect the right side plate to the electric box and the screws around the right side plate.| |9. Install the right side plate.|![image 89](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile89.png)|Screw up the screws around the right side plate. Be careful to handle well the clasps at the bottom of the right side plate.| |10. Install the grill.|![image 90](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile90.png)|Attach the grill back in place and tighten up the screws.|

    |Step|Picture|Work instruction| |---|---|---| |11. Install the upper cover plate.|![image 91](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile91.png)|Tighten up the screws around the upper cover plate.|

    Model: AUH4860ZGDA

    ##### Compressor Disassembly

    Page 67

    Note: Be sure the refrigerant is recovered and power is isolated before removing the compressor.

    |Step|Picture|Work instruction| |---|---|---| |1. Remove wires.|![image 92](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile92.png)|Loosen the securing screws of the wires with a screwdriver. Remove the wires. Note: When removing the wires, mark the wire terminals corresponding to their color so as to avoid misconnection.| |2. Loosen the securing screws at the foot of compressor.|![image 93](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile93.png)|Use a wrench to twist off the screw nuts at the foot of compressor.|

    |Step|Picture|Work instruction| |---|---|---| |3. Break off the pipes that connect to the compressor.|![image 94](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile94.png)|Braze the pipes that are connected to the compressor.

    Then remove the pipes. Note: When brazing the pipes, do not let the flame burn the other components| |4. Remove the compressor from the chassis|![image 95](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile95.png)|Take out the compressor and replace it. Note: When replacing the compressor, avoid touching the nearby pipeline and components.| |5. Fix the new compressor back onto the chassis.|![image 96](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile96.png)|After replacing the compressor, tighten up the screws at the foot of compressor.|

    |Step|Picture|Work instruction| |---|---|---| |6. Connect the pipes to the suction and discharge ports.|![image 97](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile97.png)|Braze the compressor connection pipes and connect them to the compressor.

    Note: When replacing the compressor, avoid touching the nearby pipeline and components.| |7. Connect the compressor|![image 98](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile98.png)|Connect the compressor wires to the wire terminals on the top of compressor.

    Note: When connecting the wires, be sure to match the colors with the corresponding wire terminals.|

    Model: AUH4860ZGDA

    ##### 4-Way Valve Removal

    Note: Make sure refrigerant is fully recovered and power is isolated before removing the 4-way valve.

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the solenoid coil from the 4-way valve|![image 99](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile99.png)|Carefully unscrew the screws of electromagnetic coil with a screwdriver.| |2. Break off the connection pipes from the 4-way valve.|![image 100](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile100.png)|Use a torch to loosen the 4 joints on the 4-way valve and then remove the connection pipes.

    Note: When brazing the pipes, the 4-way valve should be wrapped with wet cloth for cooling. Do not let the flame burn the other components.| |3. Replace the 4-way valve and connect it to the connection pipes.|![image 101](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile101.png)|Replace the 4-way valve and then use a torch to braze the 4 joints of the 4-way valve.

    Note: When brazing the pipes, the 4-way valve should be wrapped with wet cloth for cooling. Do not let the flame burn the other components.|

    ##### 4-Way Valve Removal

    Page 68

    Note: Make sure refrigerant is fully recovered and power is isolated before removing the 4-way valve.

    |Step|Picture|Work instruction| |---|---|---| |4. Install the coil of 4-way valve.|![image 102](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile102.png)|Tighten the screws of the coil of 4-way valve with a screwdriver.|

    Model: AUH4860ZGDA

    ##### Fan and Motor Removal

    Note: Be sure to isolate power before removing the fan.

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the grill.|![image 103](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile103.png)|Use a screwdriver to unscrew the two screws on the upper left and lower right corners.|

    |Step|Picture|Work instruction| |---|---|---| |2. Remove the fan.|![image 104](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile104.png)|Use a wrench to remove the specialized nut and gasket of the fan.

    Note: Please keep the nut and gasket safe after removing them from the fan.| |3. Remove motor.|![image 105](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile105.png)|Use a screwdriver to unscrew the bolt of motor.

    Note: Motor wire should be first removed from the electric box.| |4. Install the motor.|![image 106](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile106.png)|Replace with a new motor. Then tighten up the screw bolt.|

    |Step|Picture|Work instruction| |---|---|---| |5. Install the fan.|![image 107](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile107.png)|Install the fan in place. Put on the gasket and use a wrench to secure the screw nut.

    Note: After installing the fan, turn the fan by hand to see if it can run normally. If not, please check for the reason.| |6. Install the grill.|![image 108](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile108.png)|After replacing the motor, use a screwdriver to tighten up the screw bolt that secures the motor. Arrange the wires according to the wiring diagram.|

    ##### Compressor/Gas Liquid Separator Removal

    Note: Be sure power is isolated and refrigerant is recovered before removing the gas liquid separator.

    |Step|Picture|Work instruction|

    Page 69

    |---|---|---| |1. Loosen the wire clamp at the bottom of the electric box and the screws of electric box.|![image 109](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile109.png)|Remove the upper, lower and front panels.

    Loosen the wire clamp at the bottom of the electric box.

    Unscrew the screws of electric box.| |2. Remove the electric box.|![image 110](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile110.png)|The connection wires inside and outside the electric box should be removed.

    When removing the electric box, be careful to protect the components.| |3. Remove the compressor/ gas liquid separator from the chassis.|![image 111](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile111.png)|Remove the compressor/gas liquid separator and replace with a new one.

    Note: When replacing the compressor/gas liquid separator, avoid touching the nearby pipeline and components.|

    ##### Compressor/Gas Liquid Separator Removal

    Note: Be sure power is isolated and refrigerant is recovered before removing the gas liquid separator.

    |Step|Picture|Work instruction| |---|---|---| |4. Install the new gas liquid separator|![image 112](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile112.png)|Install the gas liquid separator by referring to the positions of entering and leaving pipes. Braze the two joints

    Nitrogen welding: the pressure of nitrogen is 2” to 3” W.C

    Note: When brazing the pipes, do not let the flame burn the other components.

    Tighten the screws of gas liquid separator.| |5. Secure the electric box and|![image 113](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile113.png)|Put the electric box back in place and tighten up the screws.

    Arrange the wires as original.| |6. Check and open the upper and side panels.|![image 114](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile114.png)|Check whether each component and connection wire is well connected.

    If everything is OK, install the upper, left and right panels. Tighten up the screws.|

    ##### Electronic Expansion Valve Removal

    Note: Be sure power is isolated and refrigerant is recovered before removing the Electronic Expansion Valve

    |Step|Picture|Work instruction| |---|---|---| |1. Loosen the wire clamp at the bottom of the electric box and the screws of electric box.|![image 115](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile115.png)|Remove the upper, lower and front panels.

    Loosen the wire clamp at the bottom of the electric box.

    Unscrew the screws of electric box.| |2. Remove the electric box.|![image 116](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile116.png)|The connection wires inside and outside the electric box should be removed.

    When removing the electric box, be careful to protect the components.| |3. Remove the electronic expansion valve.|![image 117](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile117.png)|Take off the coil of electronic expansion valve.

    Loosen the connection pipe of electronic expansion valve using a torch. Remove the connection pipe.

    Note: When brazing the pipe, do not let the flame burn the other components.|

    ############# Note: Be sure power is isolated and refrigerant is recovered before removing the Electronic Expansion Valve

    |Step|Picture|Work instruction| |---|---|---| |4. Take out the electronic expansion valve.|![image 118](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile118.png)|Take out the electronic expansion valve.| |5. Install the new electronic expansion valve.|![image 119](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile119.png)|Braze the connection pipe of electronic expansion valve.

    When brazing the electronic expansion valve, the valve should be wrapped with wet cloth.

    Nitrogen welding: the pressure of nitrogen is 2” to 3” W.C.

    Note: When brazing the pipes, do not let the flame burn the other components.

    Install the coil of electronic expansion valve.| |6. Secure the electric box and arrange the wires as required.|![image 120](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile120.png)|Put the electric box back in place and tighten up the screws.

    Arrange the wires as original.|

    Page 70

    Note: Be sure power is isolated and refrigerant is recovered before removing the Electronic Expansion Valve

    |Step|Picture|Work instruction| |---|---|---| |7. Check and open the upper and side panels.|![image 121](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile121.png)|Check whether each component and connection wire is well connected.

    If everything is OK, install the upper, left and right panels. Tighten up the screws.|

    Removal of IDU Major Components Air handler Unit

    ##### Electric Box Disassembly and Assembly

    Note: Be sure power is isolated and refrigerant is recovered before removing the Electronic Expansion Valve

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the upper panel|![image 122](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile122.png)|Loosen screws around the upper panel with a screwdriver.

    Remove the upper panel away from the unit.| |2. Remove the electric box.|![image 123](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile123.png)|Disconnect the power cord and control line from the wiring terminals, and then draw them out.

    Loosen screws around the electric box with a screwdriver.

    Remove the electric box from the unit.|

    ##### Electric Box Disassembly and Assembly

    Note: Be sure power is isolated and refrigerant is recovered before removing the Electronic Expansion Valve

    |Step|Picture|Work instruction| |---|---|---| |3. Remove the electric element.|![image 124](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile124.png)|Disconnect the electric element from the wiring terminal.

    Loosen screws around the electric element with a screwdriver.

    Remove the electric element from the electric box.| |4. Mount the new electric element.|![image 125](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile125.png)|Place the electric element at the proper position.

    Tighten the screws around the electric element with a screwdriver.

    Wire the electric element to the wiring terminal.| |5. Reinstall the electric box.|![image 126](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile126.png)|Place the electric box at the proper position.

    Tighten screws around the electric box with a screwdriver.

    Connect the power cord and control line properly.

    Reassemble the unit as before.|

    ##### Fan Motor Disassembly and Assembly

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the upper panel.|![image 127](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile127.png)|Loosen screws round the upper panel with a screwdriver.

    Remove the upper panel from unit.|

    Page 71

    |2. Remove the fan.|![image 128](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile128.png)|Disconnect the wires of the fan from the wiring terminal and draw them out.

    Loosen screws located at the front of the fan with a screwdriver.

    Remove the fan from the unit.| |3. Remove the motor.|![image 129](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile129.png)|Disconnect the wires of the fan from the wiring terminal and draw them out.

    Loosen screws located at the front of the fan with a screwdriver.

    Remove the fan from the unit.| |4. Reinstall the fan.|![image 130](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile130.png)|Place the motor at the proper position.

    Tighten screws fixing the motor and fan wheel.

    Tighten screw bolts fixing the motor bracket.

    After the installation, reassemble the unit as before.|

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the upper panel.|![image 131](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile131.png)|Loosen screws round the upper panel with a screwdriver.

    Remove the upper panel from unit| |2. Remove the lower panel (1) and panel (2).|![image 132](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile132.png)|Loosen screws round the lower panel with a screwdriver.

    Remove the lower panel from unit.| |3. Remove the enhanced frame if applicable.|![image 133](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile133.png)|Remove the screws from enhanced frame.

    Disassemble the enhanced frame from the unit.| |4. Remove the mounting plate of the drain pan.|![image 134](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile134.png)|Loosen screws at both side of the mounting plate with a screwdriver.

    Remove the mounting plate from the unit.|

    |Step|Picture|Work instruction| |---|---|---| |5. Remove the primary drain pan.|![image 135](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile135.png)|Remove the primary drain pan from the unit.| |6. Remove the secondary drain pan.|![image 136](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile136.png)|Remove the secondary drain pan from the unit.| |7. Remove the coil.|![image 137](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile137.png)|Remove the coil away from the primary drain pan.

    Reassemble the unit as before.|

    ##### Filter Disassembly and Assembly

    |Step|Picture|Work instruction| |---|---|---| |1. Remove the mounting plate|![image 138](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile138.png)|Loosen screws fixing the mounting plate. Remove the mounting plate away from the unit| |2. Remove the filter screen|![image 139](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile139.png)|Remove the filter screen away from the unit. After replacing the filter screen, reassemble the unit as before.|

    ##### Exploded View and Parts Lists ODU Exploded View and Parts Lists

    AUH2436ZGDA

    ![image 140](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile140.png)

    |No.|Material name| |---|---|

    Page 72

    |1|Coping| |2|Electric Box Assembly| |3|PFC Inductance| |4|Filter Board| |5|Reactor Sub-Assembly| |6|Power Switch| |7|Main Board| |8|Inductance| |9|Terminal Board| |10|Terminal Board| |11|Heat Sink| |12|Main Board| |13|Coil Assembly| |14|Filter Sub-Assembly| |15|Electromagnetic Valve Sub-Assembly| |16|Magnet Coil (Electromagnetic Valve)| |17|Electromagnetic Valve| |18|Strainer| |19|Brushless DC Motor| |20|Axial Flow Fan| |21|Cabinet| |22|Diversion Circle| |23|Front Grill| |24|Front Side Plate| |25|Compressor And Fittings| |26|Handle| |27|Chassis Assembly| |28|Foot| |29|Cut Off Valve|

    |No.|Material name| |---|---| |30|Fusible Plug| |31|Gas-liquid Separator| |32|Accumulator|

    Page 73

    |33|4 Way Valve Coil| |34|Drainage Hole Cap| |35|Temperature Sensor| |36|Temperature Sensor| |37|Electrical Heater(Compressor)| |38|Electrical Heater (Chassis)| |39|Electric Expansion Valve Sub-Assembly| |40|Drainage Joint| |41|Cut-Off Valve 3/8(N)| |42|Strainer| |43|Electric Expand Valve Fitting| |44|One Way Valve| |45|Electronic Expansion Valve| |46|Strainer| |47|Electric Expand Valve Fitting| |48|Electric Expansion Valve Sub-Assembly| |49|Rear Side Plate| |50|4-Way Valve Assembly| |51|Silencer| |52|Pressure Protect Switch| |53|Filter| |54|Pressure Protect Switch| |55|4-Way Valve| |56|Pressure Sensor| |57|Rear Grill|

    ########### AUH4860ZGDA

    ![image 141](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile141.png)

    |No.|Material name| |---|---| |1|Coping| |2|Rear Grill| |3|Left Side Plate|

    Page 74

    |4|Electric Box Assembly| |5|Drive Board| |6|Radiator| |7|Main Board| |8|Filter Board| |9|Terminal Board| |10|Terminal Board| |11|Inductance Box Assembly| |12|Handle| |13|Axial Flow Fan| |14|Cabinet| |15|Brushless DC Motor| |16|Gas-liquid Separator Sub-Assembly| |17|Front Grill| |18|Front Side Plate| |19|Pressure Protect Switch| |20|Brushless DC Motor| |21|Electromagnetic Valve| |22|Electric Expand Valve Fitting| |23|Electric Expansion Valve Sub-Assembly| |24|Compressor and Fittings| |25|Accumulator|

    |No.|Material name| |---|---| |26|Foot| |27|Chassis Sub-Assembly| |28|Cut Off Valve Sub-Assembly| |29|Strainer| |30|Magnet Coil (Electromagnetic Valve)| |31|Electric Expand Valve Fitting| |32|One Way Valve| |33|Cut-off Valve| |34|Electronic Expansion Valve| |35|4-Way Valve Assembly|

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    |36|Pressure Sensor| |37|Strainer| |38|Cut Off Valve 3/8| |39|Pressure Protect Switch| |40|Electrical Heater(Compressor)| |41|Electrical Heater(Compressor)| |42|4-Way Valve| |43|Handle| |44|4 Way Valve Coil| |45|Drainage Hole Cap| |46|Drainage Joint| |47|Temperature Sensor| |48|Temperature Sensor| |49|Rear Side Plate Sub-Assembly| |50|Coil Assembly|

    ######### IDU Exploded View and Parts Lists

    UUY24ZGDAA, UUY36ZGDAA

    ![image 142](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile142.png)

    |No.|Material name| |---|---| |1|Coping| |2|Left Side Plate| |3|Electric Box Assembly| |4|Terminal Board| |5|Transformer| |6|Terminal Board| |7|Main Board| |8|Terminal Board| |9|Pinboard| |10|Rear Side Plate| |11|Centrifugal Fan Assembly|

    Page 76

    |12|Motor For Centrifugal Fan| |13|Brushless DC Motor| |14|Top Cover Board Sub-Assembly| |15|Bottom Cover Plate Assembly| |16|Right Side Plate| |17|Bottom Cover Plate Assembly| |18|Water Tray| |19|Strainer| |20|Cut-Off Valve 3/8(N)| |21|Thermal Expansion Valve| |22|Cut Off Valve| |23|Evaporator Assembly| |24|Evaporator Assembly| |25|Evaporator Assembly| |26|Water Tray Assembly| |27|Choke Plug| |28|Water Tray| |29|Filter Sub-Assembly|

    ##### Temperature Sensor Temperature/Resistance/Voltage Lists 15 KΩ Temperature Sensors (including ODU temperature sensors)

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |-4.0|-20|144|0.311| |-2.2|-19|138.1|0.323| |-0.4|-18|128.6|0.345| |1.4|-17|121.6|0.362| |3.2|-16|115|0.381| |5.0|-15|108.7|0.4| |6.8|-14|102.9|0.42| |8.6|-13|97.4|0.44| |10.4|-12|92.22|0.462| |12.2|-11|87.35|0.484| |14.0|-10|82.75|0.506| |15.8|-9|78.43|0.53|

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    |17.6|-8|74.35|0.554| |19.4|-7|70.5|0.579| |21.2|-6|66.88|0.605| |23.0|-5|63.46|0.631| |24.8|-4|60.23|0.658| |26.6|-3|57.18|0.686| |28.4|-2|54.31|0.714| |30.2|-1|51.59|0.743| |32.0|0|49.02|0.773| |33.8|1|46.8|0.801| |35.6|2|44.31|0.835| |37.4|3|42.14|0.866| |39.2|4|40.09|0.899| |41.0|5|38.15|0.931| |42.8|6|36.32|0.965| |44.6|7|34.58|0.998| |46.4|8|32.94|1.033| |48.2|9|31.38|1.067| |50.0|10|29.9|1.102| |51.8|11|28.51|1.138| |53.6|12|27.18|1.174| |55.4|13|25.92|1.21| |57.2|14|24.73|1.246| |59.0|15|23.6|1.282| |60.8|16|22.53|1.319| |62.6|17|21.51|1.356| |64.4|18|20.54|1.393| |66.2|19|19.63|1.429| |68.0|20|18.75|1.467| |69.8|21|17.93|1.503| |71.6|22|17.14|1.54| |73.4|23|16.39|1.577| |75.2|24|15.68|1.613|

    |F°|C°|Resistance (kΩ)|Voltage (V)|

    Page 78

    |---|---|---|---| |77.0|25|15|1.65| |78.8|26|14.36|1.686| |80.6|27|13.74|1.722| |82.4|28|13.16|1.758| |84.2|29|12.6|1.793| |86.0|30|12.07|1.829| |87.8|31|11.57|1.863| |89.6|32|11.09|1.897| |91.4|33|10.63|1.931| |93.2|34|10.2|1.964| |95.0|35|9.779|1.998| |96.8|36|9.382|2.03| |98.6|37|9.003|2.062| |100.4|38|8.642|2.094| |102.2|39|5.997|2.125| |105.8|41|7.653|2.185| |107.6|42|7.352|2.215| |109.4|43|7.065|2.243| |111.2|44|6.791|2.272| |113.0|45|6.529|2.299| |114.8|46|6.278|2.326| |116.6|47|6.038|2.353| |118.4|48|5.809|2.379| |120.2|49|5.589|2.404| |122.0|50|5.379|2.429| |123.8|51|5.179|2.453| |125.6|52|4.986|2.477| |127.4|53|4.802|2.5| |129.2|54|4.625|2.522| |131.0|55|4.456|2.544| |132.8|56|4.294|2.566| |134.6|57|4.139|2.586| |136.4|58|3.99|2.607| |138.2|59|3.848|2.626| |140.0|60|3.711|2.646|

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    |141.8|61|3.579|2.664| |143.6|62|3.454|2.682| |145.4|63|3.333|2.7| |147.2|64|3.217|2.717| |149.0|65|3.105|2.734| |150.8|66|2.998|2.75| |152.6|67|2.898|2.766| |154.4|68|2.797|2.781| |156.2|69|2.702|2.796| |158.0|70|2.611|2.811|

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |159.8|71|2.523|2.825| |161.6|72|2.439|2.838| |163.4|73|2.358|2.852| |165.2|74|2.28|2.865| |167.0|75|2.205|2.877| |168.8|76|2.133|2.889| |170.6|77|2.064|2.901| |172.4|78|1.997|2.912| |174.2|79|1.933|2.923| |176.0|80|1.871|2.934| |177.8|81|1.811|2.945| |179.6|82|1.754|2.955| |181.4|83|1.699|2.964| |183.2|84|1.645|2.974| |185.0|85|1.594|2.983| |186.8|86|1.544|2.992| |188.6|87|1.497|3.001| |190.4|88|1.451|3.009| |192.2|89|1.408|3.017| |194.0|90|1.363|3.025| |195.8|91|1.322|3.033| |197.6|92|1.282|3.04|

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    |199.4|93|1.244|3.047| |201.2|94|1.207|3.054| |203.0|95|1.171|3.061| |204.8|96|1.136|3.068| |206.6|97|1.103|3.074| |208.4|98|1.071|3.08| |210.2|99|1.039|3.086| |212.0|100|1.009|3.092| |213.8|101|0.98|3.098| |215.6|102|0.952|3.103| |217.4|103|0.925|3.108| |219.2|104|0.898|3.114| |221.0|105|0.873|3.119| |222.8|106|0.848|3.123| |224.6|107|0.825|3.128| |226.4|108|0.802|3.133| |228.2|109|0.779|3.137| |230.0|110|0.758|3.141| |231.8|111|0.737|3.145| |233.6|112|0.717|3.15| |235.4|113|0.697|3.153| |237.2|114|0.678|3.157| |239.0|115|0.66|3.161|

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |240.8|116|0.642|3.165| |242.6|117|0.625|3.168| |244.4|118|0.608|3.171| |246.2|119|0.592|3.175| |248.0|120|0.577|3.178| |249.8|121|0.561|3.181| |251.6|122|0.547|3.184| |253.4|123|0.532|3.187| |255.2|124|0.519|3.19|

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    |257.0|125|0.505|3.192| |258.8|126|0.492|3.195| |260.6|127|0.48|3.198| |262.4|128|0.467|3.2| |264.2|129|0.456|3.203| |266.0|130|0.444|3.205| |267.8|131|0.433|3.207| |269.6|132|0.422|3.21| |271.4|133|0.412|3.212| |273.2|134|0.401|3.214| |275.0|135|0.391|3.216| |276.8|136|0.382|3.218| |278.6|137|0.372|3.22| |280.4|138|0.363|3.222| |282.2|139|0.355|3.224| |284.0|140|0.346|3.226| |285.8|141|0.338|3.227| |287.6|142|0.33|3.229| |289.4|143|0.322|3.231| |291.2|144|0.314|3.232| |293.0|145|0.307|3.234| |294.8|146|0.299|3.235| |296.6|147|0.292|3.237| |298.4|148|0.286|3.238| |300.2|149|0.279|3.24| |302.0|150|0.273|3.241| |303.8|151|0.266|3.242| |305.6|152|0.261|3.244| |307.4|153|0.254|3.245| |309.2|154|0.248|3.246| |311.0|155|0.243|3.247| |312.8|156|0.237|3.249| |314.6|157|0.232|3.25| |316.4|158|0.227|3.251| |318.2|159|0.222|3.252| |320.0|160|0.217|3.253|

    Page 82

    ######### 20 KΩ Pipeline Temperature Sensors (including temperature sensors for defroster, IDU and ODU pipes)

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |-22.0|-30|361.8|0.173| |-20.2|-29|339.8|0.183| |-18.4|-28|319.2|0.195| |-16.6|-27|300|0.206| |-14.8|-26|282.2|0.218| |-13.0|-25|265.5|0.231| |-11.2|-24|249.9|0.245| |-9.4|-23|235.3|0.259| |-7.6|-22|221.6|0.273| |-5.8|-21|208.9|0.288| |-4.0|-20|196.9|0.304| |-2.2|-19|181.4|0.328| |-0.4|-18|171.4|0.345| |1.4|-17|162.1|0.362| |3.2|-16|153.3|0.381| |5.0|-15|145|0.4| |6.8|-14|137.2|0.42| |8.6|-13|129.9|0.44| |10.4|-12|123|0.462| |12.2|-11|116.5|0.484| |14.0|-10|110.3|0.507| |15.8|-9|104.6|0.53| |17.6|-8|99.13|0.554| |19.4|-7|94|0.579| |21.2|-6|89.17|0.605| |23.0|-5|84.61|0.631| |24.8|-4|80.31|0.658| |26.6|-3|76.24|0.686| |28.4|-2|72.41|0.714| |30.2|-1|68.79|0.743|

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    |32.0|0|65.37|0.773| |33.8|1|62.13|0.804| |35.6|2|59.08|0.835| |37.4|3|56.19|0.866| |39.2|4|53.46|0.898| |41.0|5|50.87|0.931| |42.8|6|48.42|0.965| |44.6|7|46.11|0.998| |46.4|8|43.92|1.033| |48.2|9|41.84|1.067| |50.0|10|39.87|1.102| |51.8|11|38.01|1.138| |53.6|12|36.24|1.174| |55.4|13|34.57|1.209| |57.2|14|32.98|1.246| |59.0|15|31.47|1.282| |60.8|16|30.04|1.319| |62.6|17|28.68|1.356|

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |64.4|18|27.39|1.393| |66.2|19|26.17|1.429| |68.0|20|25.01|1.466| |69.8|21|23.9|1.503| |71.6|22|22.85|1.54| |73.4|23|21.85|1.577| |75.2|24|20.9|1.614| |77.0|25|20|1.65| |78.8|26|19.14|1.686| |80.6|27|18.32|1.722| |82.4|28|17.55|1.758| |84.2|29|16.8|1.793| |86.0|30|16.1|1.828| |87.8|31|15.43|1.863|

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    |89.6|32|14.79|1.897| |91.4|33|14.18|1.931| |93.2|34|13.59|1.965| |95.0|35|13.04|1.998| |96.8|36|12.51|2.03| |98.6|37|12|2.063| |100.4|38|11.52|2.094| |102.2|39|11.06|2.125| |104.0|40|10.62|2.155| |105.8|41|10.2|2.185| |107.6|42|9.803|2.215| |109.4|43|9.42|2.243| |111.2|44|9.054|2.272| |113.0|45|8.705|2.299| |114.8|46|8.37|2.326| |116.6|47|8.051|2.353| |118.4|48|7.745|2.379| |120.2|49|7.453|2.404| |122.0|50|7.173|2.429| |123.8|51|6.905|2.453| |125.6|52|6.648|2.477| |127.4|53|6.403|2.5| |129.2|54|6.167|2.522| |131.0|55|5.942|2.544| |132.8|56|5.726|2.565| |134.6|57|5.519|2.586| |136.4|58|5.32|2.607| |138.2|59|5.13|2.626| |140.0|60|4.948|2.646| |141.8|61|4.773|2.664| |143.6|62|4.605|2.682| |145.4|63|4.443|2.7| |147.2|64|4.289|2.717| |149.0|65|4.14|2.734|

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    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |150.8|66|3.998|2.75| |152.6|67|3.861|2.766| |154.4|68|3.729|2.781| |156.2|69|3.603|2.796| |158.0|70|3.481|2.811| |159.8|71|3.364|2.825| |161.6|72|3.252|2.838| |163.4|73|3.144|2.852| |165.2|74|3.04|2.865| |167.0|75|2.94|2.877| |168.8|76|2.844|2.889| |170.6|77|2.752|2.901| |172.4|78|2.663|2.912| |174.2|79|2.577|2.923| |176.0|80|2.495|2.934| |177.8|81|2.415|2.944| |179.6|82|2.339|2.954| |181.4|83|2.265|2.964| |183.2|84|2.194|2.974| |185.0|85|2.125|2.983| |186.8|86|2.059|2.992| |188.6|87|1.996|3.001| |190.4|88|1.934|3.009| |192.2|89|1.875|3.017| |194.0|90|1.818|3.025| |195.8|91|1.763|3.033| |197.6|92|1.71|3.04| |199.4|93|1.658|3.047| |201.2|94|1.609|3.054| |203.0|95|1.561|3.061| |204.8|96|1.515|3.068| |206.6|97|1.47|3.074| |208.4|98|1.427|3.08| |210.2|99|1.386|3.086|

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    |212.0|100|1.346|3.092| |213.8|101|1.307|3.098| |215.6|102|1.269|3.103| |217.4|103|1.233|3.108| |219.2|104|1.198|3.114| |221.0|105|1.164|3.119| |222.8|106|1.131|3.123| |224.6|107|1.099|3.128| |226.4|108|1.069|3.133| |228.2|109|1.039|3.137| |230.0|110|1.01|3.141| |231.8|111|0.9825|3.145| |233.6|112|0.9556|3.15| |235.4|113|0.9295|3.153|

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |237.2|114|0.9043|3.157| |239.0|115|0.8799|3.161| |240.8|116|0.8562|3.165| |242.6|117|0.8333|3.168| |244.4|118|0.8111|3.171| |246.2|119|0.7895|3.175| |248.0|120|0.7687|3.178| |249.8|121|0.7485|3.181| |251.6|122|0.7289|3.184| |253.4|123|0.7099|3.187| |255.2|124|0.6915|3.19| |257.0|125|0.6736|3.192| |258.8|126|0.6563|3.195| |260.6|127|0.6395|3.198| |262.4|128|0.6232|3.2| |264.2|129|0.6074|3.203| |266.0|130|0.5921|3.205| |267.8|131|0.5772|3.207|

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    |269.6|132|0.5627|3.21| |271.4|133|0.5487|3.212| |273.2|134|0.5351|3.214| |275.0|135|0.5219|3.216| |276.8|136|0.509|3.218| |278.6|137|0.4966|3.22| |280.4|138|0.4845|3.222| |282.2|139|0.4727|3.224| |284.0|140|0.4613|3.226| |285.8|141|0.4502|3.227| |287.6|142|0.4394|3.229| |289.4|143|0.4289|3.231| |291.2|144|0.4187|3.232| |293.0|145|0.4088|3.234| |294.8|146|0.3992|3.235| |296.6|147|0.3899|3.237| |298.4|148|0.3808|3.238| |300.2|149|0.3719|3.24| |302.0|150|0.3633|3.241| |303.8|151|0.3549|3.242| |305.6|152|0.3468|3.244| |307.4|153|0.3389|3.245| |309.2|154|0.3312|3.246| |311.0|155|0.3237|3.247| |312.8|156|0.3164|3.249| |314.6|157|0.3093|3.25| |316.4|158|0.3024|3.251| |318.2|159|0.2956|3.252| |320.0|160|0.2891|3.253|

    ######### 50 KΩ Discharge Temperature Sensors (including discharge air temperature sensor)

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |-22.0|-30|911.56|0.036|

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    |-20.2|-29|853.66|0.038| |-18.4|-28|799.98|0.041| |-16.6|-27|750.18|0.043| |-14.8|-26|703.92|0.046| |-13.0|-25|660.93|0.049| |-11.2|-24|620.94|0.052| |-9.4|-23|583.72|0.056| |-7.6|-22|549.04|0.059| |-5.8|-21|516.71|0.063| |-4.0|-20|486.55|0.066| |-2.2|-19|458.4|0.07| |-0.4|-18|432.1|0.075| |1.4|-17|407.51|0.079| |3.2|-16|384.51|0.084| |5.0|-15|362.99|0.088| |6.8|-14|342.83|0.094| |8.6|-13|323.94|0.099| |10.4|-12|306.23|0.104| |12.2|-11|289.61|0.11| |14.0|-10|274.02|0.116| |15.8|-9|259.37|0.123| |17.6|-8|245.61|0.129| |19.4|-7|232.67|0.136| |21.2|-6|220.5|0.143| |23.0|-5|209.05|0.151| |24.8|-4|195.97|0.158| |26.6|-3|188.12|0.167| |28.4|-2|178.65|0.175| |30.2|-1|169.68|0.184| |32.0|0|161.02|0.193| |33.8|1|153|0.202| |35.6|2|145.42|0.212| |37.4|3|135.96|0.223| |39.2|4|131.5|0.233| |41.0|5|126.17|0.242| |42.8|6|119.08|0.256|

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    |44.6|7|113.37|0.267| |46.4|8|107.96|0.28| |48.2|9|102.85|0.292| |50.0|10|98.006|0.306| |51.8|11|93.42|0.319| |53.6|12|89.075|0.333| |55.4|13|84.956|0.348| |57.2|14|81.052|0.362| |59.0|15|77.349|0.378|

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |60.8|16|73.896|0.393| |62.6|17|70.503|0.41| |64.4|18|67.338|0.427| |66.2|19|64.333|0.444| |68.0|20|61.478|0.462| |69.8|21|58.766|0.48| |71.6|22|56.189|0.499| |73.4|23|53.738|0.518| |75.2|24|51.408|0.537| |77.0|25|49.191|0.558| |78.8|26|47.082|0.578| |80.6|27|45.074|0.599| |82.4|28|43.163|0.621| |84.2|29|41.313|0.643| |86.0|30|39.61|0.665| |87.8|31|37.958|0.688| |89.6|32|36.384|0.711| |91.4|33|34.883|0.735| |93.2|34|33.453|0.759| |95.0|35|32.088|0.784| |96.8|36|30.787|0.809| |98.6|37|29.544|0.835| |100.4|38|28.359|0.86|

    Page 90

    |102.2|39|27.227|0.886| |104.0|40|26.147|0.913| |105.8|41|25.114|0.94| |107.6|42|24.128|0.967| |109.4|43|23.186|0.994| |111.2|44|22.286|1.022| |113.0|45|21.425|1.05| |114.8|46|20.601|1.078| |116.6|47|19.814|1.107| |118.4|48|19.061|1.136| |120.2|49|18.34|1.164| |122.0|50|17.651|1.193| |123.8|51|16.99|1.223| |125.6|52|16.358|1.252| |127.4|53|15.753|1.281| |129.2|54|15.173|1.311| |131.0|55|14.618|1.34| |132.8|56|14.085|1.37| |134.6|57|13.575|1.4| |136.4|58|13.086|1.429| |138.2|59|12.617|1.459| |140.0|60|12.368|1.475| |141.8|61|11.736|1.518|

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |143.6|62|11.322|1.548| |145.4|63|10.925|1.577| |147.2|64|10.544|1.606| |149.0|65|10.178|1.635| |150.8|66|9.8269|1.664| |152.6|67|9.4896|1.693| |154.4|68|9.1655|1.722| |156.2|69|8.9542|1.741| |158.0|70|8.5551|1.778|

    Page 91

    |159.8|71|5.9676|1.806| |161.6|72|7.9913|1.834| |163.4|73|7.7257|1.862| |165.2|74|7.4702|1.889| |167.0|75|7.2245|1.916| |168.8|76|6.9882|1.943| |170.6|77|6.7608|1.969| |172.4|78|6.542|1.995| |174.2|79|6.3315|2.021| |176.0|80|6.1288|2.046| |177.8|81|5.9336|2.071| |179.6|82|5.7457|2.096| |181.4|83|5.5647|2.12| |183.2|84|5.3903|2.144| |185.0|85|5.2223|2.168| |186.8|86|5.0605|2.191| |188.6|87|4.9044|2.214| |190.4|88|4.7541|2.237| |192.2|89|4.6091|2.259| |194.0|90|4.4693|2.281| |195.8|91|4.3345|2.302| |197.6|92|4.2044|2.323| |199.4|93|4.0789|2.344| |201.2|94|3.9579|2.364| |203.0|95|3.841|2.384| |204.8|96|3.7283|2.404| |206.6|97|3.6194|2.423| |208.4|98|3.5143|2.442| |210.2|99|3.4128|2.46| |212.0|100|3.3147|2.478| |213.8|101|3.22|2.496| |215.6|102|3.1285|2.514| |217.4|103|3.0401|2.531| |219.2|104|2.9547|2.547| |221.0|105|2.8721|2.564| |222.8|106|2.7922|2.58|

    Page 92

    |224.6|107|2.715|2.595|

    |F°|C°|Resistance (kΩ)|Voltage (V)| |---|---|---|---| |226.4|108|2.6404|2.611| |228.2|109|2.5682|2.626| |230.0|110|2.4983|2.64| |231.8|111|2.4308|2.655| |233.6|112|2.3654|2.669| |235.4|113|2.3021|2.682| |237.2|114|2.2409|2.696| |239.0|115|2.1816|2.709| |240.8|116|2.1242|2.722| |242.6|117|2.0686|2.734| |244.4|118|2.0148|2.747| |246.2|119|1.9626|2.759| |248.0|120|1.9123|2.77| |249.8|121|1.8652|2.781| |251.6|122|1.8158|2.793| |253.4|123|1.7698|2.804| |255.2|124|1.7253|2.814| |257.0|125|1.6821|2.825| |258.8|126|1.6402|2.835| |260.6|127|1.5996|2.845| |262.4|128|1.5602|2.855| |264.2|129|1.522|2.864| |266.0|130|1.485|2.873| |267.8|131|1.449|2.882| |269.6|132|1.4141|2.891| |271.4|133|1.3803|2.9| |273.2|134|1.3474|2.908| |275.0|135|1.3155|2.916| |276.8|136|1.2846|2.924| |278.6|137|1.2545|2.932| |280.4|138|1.2233|2.94|

    Page 93

    |282.2|139|1.1969|2.947| |284.0|140|1.1694|2.955| |285.8|141|1.1476|2.96| |287.6|142|1.1166|2.969| |289.4|143|1.0913|2.975| |291.2|144|1.0667|2.982| |293.0|145|1.0429|2.988| |294.8|146|1.0197|2.995| |296.6|147|0.9971|3.001| |298.4|148|0.9752|3.007| |300.2|149|0.9538|3.013| |302.0|150|0.9331|3.018|

    ##### Refrigerant R-410A Temperature/Pressure List

    |PSIG|°F| |---|---| |12|–37.7| |14|–34.7| |16|–32.0| |18|–29.4| |20|–36.9| |22|–24.5| |24|–22.2| |26|–20.0| |28|–17.9| |30|–15.8| |32|–13.8| |34|–11.9| |36|–10.1| |38|–8.3| |40|–6.5| |42|–4.5| |44|–3.2| |46|–1.6|

    Page 94

    |48|0| |50|1.5| |52|3| |54|4.5| |56|5.9| |58|7.3| |60|8.6| |62|10| |64|11.3| |66|12.6| |68|13.8| |70|15.1| |72|16.3| |74|17.5| |76|18.7| |78|19.8| |80|21| |82|22.1| |84|23.2| |86|24.3| |88|25.4| |90|26.4| |92|27.4| |94|28.5| |96|29.5| |98|30.5|

    |PSIG|°F| |---|---| |100|31.2| |102|32.2| |104|33.2| |106|34.1| |108|35.1| |110|35.5|

    Page 95

    |112|36.9| |114|37.8| |116|38.7| |118|39.5| |120|40.5| |122|41.3| |124|42.2| |126|43| |128|43.8| |130|44.7| |132|45.5| |134|46.3| |136|47.1| |138|47.9| |140|48.7| |142|49.5| |144|50.3| |146|51.1| |148|51.8| |150|52.5| |152|53.3| |154|54| |156|54.8| |158|55.5| |160|56.2| |162|57| |164|57.7| |166|58.4| |168|59| |170|59.8| |172|60.5| |174|61.1| |176|61.8| |178|62.5| |180|63.1| |182|63.8|

    Page 96

    |184|64.5| |186|65.1|

    |PSIG|°F| |---|---| |188|65.8| |190|66.4| |192|67| |194|67.7| |196|68.3| |198|68.9| |200|69.5| |202|70.1| |204|70.7| |206|71.4| |208|72| |210|72.6| |212|73.2| |214|73.8| |216|74.3| |218|74.9| |220|75.5| |222|76.1| |224|76.7| |226|77.2| |228|77.8| |230|78.4| |232|78.9| |234|79.5| |236|80| |238|80.6| |240|81.1| |242|81.6| |244|82.2| |246|82.7|

    Page 97

    |248|83.3| |250|83.8| |252|84.3| |254|84.8| |256|85.4| |258|85.9| |260|86.4| |262|86.9| |264|87.4| |266|87.9| |268|88.4| |270|88.9| |272|89.4| |274|89.9|

    |PSIG|°F| |---|---| |276|90.4| |278|90.9| |280|91.4| |282|91.9| |284|92.4| |286|92.8| |288|93.3| |290|93.8| |292|94.3| |294|94.8| |296|95.2| |298|95.7| |300|96.2| |302|96.6| |304|97.1| |306|97.5| |308|98| |310|98.4|

    Page 98

    |312|98.9| |314|99.3| |316|99.7| |318|100.2| |320|100.7| |322|101.1| |324|101.6| |326|102| |328|102.4| |330|102.9| |332|103.3| |334|103.7| |336|104.2| |338|104.6| |340|105.1| |342|105.4| |344|105.8| |346|106.3| |348|106.6| |350|107.1| |352|107.5| |354|107.9| |356|108.3| |358|108.8| |360|109.2| |362|109.6|

    |PSIG|°F| |---|---| |364|110| |366|110.4| |368|110.8| |370|111.2| |372|111.6| |374|112|

    Page 99

    |376|112.4| |378|112.6| |380|113.1| |382|113.5| |384|113.9| |386|114.3| |388|114.7| |390|115| |392|115.5| |394|115.8| |396|116.2| |398|116.6| |400|117| |402|117.3| |404|117.7| |406|118.1| |408|118.5| |410|118.8| |412|119.2| |414|119.6| |416|119.9| |418|120.3| |420|120.7| |422|121| |424|121.4| |426|121.7| |428|122.1| |430|122.5| |432|122.8| |434|123.2| |436|123.5| |438|123.9| |440|124.2| |442|124.6| |444|124.9| |446|125.3|

    Page 100

    |448|125.6| |450|126|

    |PSIG|°F| |---|---| |452|126.3| |454|126.6| |456|127| |458|127.3| |460|127.7| |462|128| |464|128.3| |466|128.7| |468|129| |470|129.3| |472|129.7| |474|130| |476|130.3| |478|130.7| |480|131| |482|131.3| |484|131.6| |486|132| |488|132.3| |490|132.6| |492|132.9| |494|133.3| |496|133.6| |498|133.9| |500|134| |502|134.5| |504|134.8| |506|135.2| |508|135.5| |510|135.8|

    Page 101

    |512|136.1| |514|136.4| |516|136.7| |518|137| |520|137.3| |522|137.6| |524|137.9| |526|138.3| |528|138.6| |530|138.9| |532|139.2| |534|139.5| |536|139.8| |538|140.1|

    |PSIG|°F| |---|---| |540|140.4| |544|141| |548|141.6| |552|142.1| |556|142.7| |560|143.3| |564|143.9| |568|144.5| |572|145| |576|145.6| |580|146.2| |584|146.7| |588|147.3| |592|147.9| |596|148.4| |600|149| |604|149.5| |608|150.1|

    Page 102

    |612|150.6| |616|151.2| |620|151.7| |624|152.3| |628|152.8| |632|153.4| |636|153.9| |640|154.5| |644|155| |648|155.5| |652|156.1| |656|156.6| |660|157.1| |664|157.7| |668|158.2| |672|158.7| |676|159.2| |680|159.8| |684|160.3| |688|160.8| |692|161.3| |696|161.8|

    ![image 143](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile143.png)

    ![image 144](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile144.png)

    ![image 145](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile145.png)

    ![image 146](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile146.png)

    ![image 147](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile147.png)

    ![image 148](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile148.png)

    ![image 149](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile149.png)

    ######## 94

    ![image 150](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile150.png)

    ![image 151](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile151.png)

    ![image 152](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile152.png)

    ###### 95

    ![image 153](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile153.png)

    ENGLISH

    ![image 154](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile154.png)

    ![image 155](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile155.png)

    CONNECT SERIES SERVICE MANUAL96

    ![image 156](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile156.png)

    ![image 157](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile157.png)

    ![image 158](GE_20Connect_20Series_20Service_20Manual_202020902_images/imageFile158.png)

    ######## CONNECT SERIES SERVICE MANUAL 97

    ENGLISH

    ##### Operation Tools

    The following tools will be used: 1) Liquid-level gauge; 2) Screwdriver; 3) Electric driven rotary hammer; 4) Drill; 5) Flare Tool; 6) Torque wrench; 7) Open-end wrench; 8) Pipe cutter; 9) Leak detector; 10) Vacuum pump; 11) Pressure gauge; 12) Multi-meter; 13) Hexagon wrench; 14) Measuring tape.

    CONNECT SERIES SERVICE MANUAL98

    www.geappliances.com

    GE Appliances, A Haier Company Appliance Park, Louisville, KY 40225

    ©2020 GE Appliances, A Haier CompanyRevision Date: July 2020

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