Mitsubishi Electric PUMY-P112VKM1 Service Manual page 56

Check code
High pressure trouble
1302
Chart 4 of 4
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis Remedy
Continued from the previous page
Replace the SV1.
Is there a resistance detected?
No
Yes
<63H equipped model (63HS non-equipped)>
Is the connector for outdoor
multi controller circuit board 63H Reconnect the connector or connect it tightly.
Yes
disconnected or loose?
No
Replace the outdoor multi controller circuit
board.
<63HS equipped model (63H non-equipped)>
Check the 63HS voltage.
Is there a voltage detected?
Replace the 63HS.
No
Yes
Replace the outdoor multi controller circuit
board.
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OCH576