What does it mean when Err 06 or Err 70 appears on the observation monitor?
Err 06 indicates that sensor cleaning is not possible, and Err 70 indicates that photography is not possible due to an error. Both errors indicate a malfunction detected in the digital camera; you should turn off the power to the retinal camera and then turn it on again. (Page 45)
From the official Canon Cr-2 Af Camera manual, page 45
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