Mitsubishi Electric PURY-P72 Service Handbook page 252

[ IX Troubleshooting ]
1. Error Code
5301 (YJMU-A)
Faulty ACCT wiring (Detail code 120)
2. Error definition and error detection method
Presence of target current cannot be detected during the self-diagnostic operation immediately before startup.
3. Cause, check method and remedy
Cause
(1) Inverter output wiring problem
(2) Inverter failure
(3) Compressor failure
Refer to section -7- "Inverter (YJMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 320)
HWE09130
Check method and remedy
Check output wiring connections.
Confirm that the U- and W-phase output cables are put through CT12
and CT22 on the INV board respectively.
Refer to IX [4] -7- (2) [3], [4].(page 322)
Refer to IX [4] -7- (2) [2].(page 322)
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