Mitsubishi Electric PUMY-P112VKM1 Service Manual page 52

Check code
Low pressure trouble
1300
Chart 3 of 3
●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
Check the resistance of SV1.
Replace the SV1.
Is there a resistance detected?
No
Yes
<63L equipped model>
Is the connector for outdoor multi
controller circuit board 63L Reconnect the connector or connect it tightly.
Yes
disconnected or loose?
No
Replace the outdoor multi controller circuit
board.
52
OCH576