Canon iR2200 Service Handbook page 252

CHAPTER 6 SELF DIAGNOSIS
E315
Any of the following is true in the image processing by the main controller:
1. The image data has a fault.
2. The encoding/decoding operation for image data has a fault.
3. The image processing element of the main controller PCB has a fault.
Main cause The image data is faulty. The main controller PCB is faulty. The HDD is
faulty.
Action
If this error occurs during normal copying or printing, the job in question
(image data) is cleared when the main power switch is turned off and then
on again; i.e., the machine will be reset.
If this error occurs frequently, however, a fault on the main controller PCB
is a possibility. Further, if this error occurs in a specific image within the
MAIL BOX, damage in data may be assumed; be sure to delete the image
from the MAIL BOX.
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