Mitsubishi PUMY-P60NKMU Technical & Service Manual page 73

Check code
6607
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Procedure 1:
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.
Is the abnormality reproduced?
Check the address switch on the source of
abnormality.
Is it set properly?
Check the transmission line for a
disconnection and looseness
(on the terminal board and connector).
The transmission line is connected
properly.
Check the transmission line whether it
exceeds the tolerance or not.
It is not exceeding the tolerance.
Check whether the correct kind of
transmission line is used or not.
Continue to the next page
OCH502C
Diagnosis
No
Yes
No
Yes
No
Yes
No
Yes
No ACK error
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.
Connect the transmission line properly,
then perform the procedure 1.
Correct it within the tolerance, then perform
the procedure 1.
73
Chart 3 of 4
Remedy