Check code
Abnormal points and detection methods Causes and check points
Abnormal if the data of unit/transmission processor were not normally
transmitted.
Abnormal 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 defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis Remedy
6606
Signal communication error with transmission processor
Yes
No
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.
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