Mitsubishi PUMY-P60NKMU Technical & Service Manual page 38

Check code
1300
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Continued from the previous page
Check the resistance of SV1.
Is there a resistance detected?
<63L equipped model (63LS non-equipped)>
Is the connector for outdoor
controller board 63L disconnected or
loose?
<63LS equipped model (63L non-equipped)>
Check the 63LS voltage.
Is there a voltage detected?
OCH502C
Low pressure trouble
Diagnosis
Yes
Yes
No
Yes
No
Reconnect the connector or connect it tightly.
Replace the outdoor controller board
No
Replace the outdoor controller board.
38
Chart 3 of 3
Remedy
Replace the SV1.
Replace the 63LS.