Mitsubishi Electric PUMY-P250YBM2-ER 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 there refrigerant leak?
Is the connector for outdoor
multi controller circuit board 63H
disconnected or loose?
Do 63H and TRS disconnect or loose ?
Check the 63HS voltage.
Is the voltage detected?
TCH091
High pressure trouble or
High compressor temperature trouble
Diagnosis
No
Yes
Yes
(no leak)
No
Yes
No
Yes
No
No
Yes
Repair the refrigerant leakage.
Reconnect the connector or connect it tightly.
Reconnect 63H and TRS tightly.
Replace the outdoor multi controller circuit
board.
48
Chart 4 of 4
Remedy
Replace the SV1.
Replace the 63HS.