Mitsubishi Electric PUMY-P250YBM Technical & Service Manual page 48

Check code
1302
(UE)
●Diagnosis of defects
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Continued from the previous page.
Is the resistance detected?
Is the connector for outdoor
multi controller circuit board 63H
disconnected or loose?
Check the 63HS voltage.
Is the voltage detected?
OCH760
High pressure trouble
Diagnosis
Yes
No
Yes
No
Reconnect the connector or connect it tightly.
Yes
No
Replace the outdoor multi controller circuit
board.
48
Chart 4 of 4
Remedy
Replace the SV1.
Replace the 63HS.