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TheAChub
Error Code 0404
1. Error code definition
Indoor unit control-related errors
2. Error definition and error detection method
Indoor controller board
Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board.
3. Cause, check method and remedy
Note: Refer also to the Service Handbook for the indoor units.
Cause Check method and remedy
Defective indoor controller board Replace indoor controller board
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