OCH790 _71
6607 (A7): No ACK error
Chart 3 of 4
Diagnosis of failure
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.
Check the transmission line whether it exceeds
the limits or not.
Check whether the correct kind of transmission
line is used or not.
Correct it within the limits, then perform the
procedure 1.
Connect the transmission line properly, then
perform the procedure 1.
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.
Refer to the diagnosis of check code
<1302> High pressure trouble.
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 10 minutes, then turn the
power back ON.
Procedure 1:
Continue to the next page.
Is the abnormality replicated?
Is it set properly?
The transmission line is connected
properly.
It exceeds the limits.
Yes
Yes
No
No
No
No
Yes
Yes
Yes
Is the check code
<1302> High pressure
trouble displayed ?
No
