Check code
Abnormal points and detection methods
Causes and checkpoints
If the data of unit/transmission processor were not normally transmitted.
If the address transmission from the unit processor was not normally
transmitted.
Accidental disturbance such as noise or lightning
surge
Hardware malfunction of transmission processor
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
6606
(A6)
Signal communication error with transmission processor
Yes
No
76
OCH634C
Does it operate normally?
Replace the controller
(Defect of error source controller).
There is no abnormality on the AC unit.
It might be caused by an external noise, so check
the transmission line to remove the factor(s).
Turn the power OFF of indoor/outdoor unit, Fresh
Master, Lossnay and remote controller simultaneously
for 2 minutes or more, then turn the power back ON.
