Check code
6607
(A7)
No ACK error
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting
any connectors, or replacing boards.
Diagnosis
Remedy
Chart 3 of 4
*For the tolerance, refer to the
Installation Manual.
Note:
When the address of the outdoor unit is displayed as abnormal, the
outdoor circuit board may be faulty. If the unit is not restored after
conducting the following procedure, check the outdoor circuit board.
No
Yes
Yes
No
No
Yes
Yes
No
The transmission line is connected
properly.
It is not exceeding the tolerance.
Check the transmission line whether it
exceeds the tolerance(*) or not.
Check whether the correct kind of
transmission line is used or not.
Correct it within the tolerance, then perform
the procedure 1.
Connect the transmission line properly,
then perform the procedure 1.
Is the abnormality replicated?
Is it set properly?
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).
Set the address properly, then perform the
procedure 1.
Check the address switch on the source of
abnormality.
Check the transmission line for
disconnection and looseness
(on the terminal board and connector).
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.
Procedure 1:
Continue to the next page.
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OCH668G