Faulty Acct Wiring - Mitsubishi Electric PURY-P72 Service Handbook

[ IX Troubleshooting ]
1. Error Code
5301 (YJMU-A)
Open-circuited IPM/Loose ACCT connector (Detail code 119)
2. Error definition and error detection method
Presence of enough current cannot be detected during the self-diagnostic operation immediately before inverter 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)
1. Error Code
5301 (TJMU-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. (Detection of
improperly mounted ACCT sensor)
3. Cause, check method and remedy
P72 model
Cause
(1) Inverter output wiring problem
(2) Inverter failure
(3) Compressor failure
(4) INV board failure
P96, P120, P144 models
Cause
(1) Wrongly mounted ACCT sensor
(2) ACCT sensor failure
(3) Inverter failure
(4) Compressor failure
Refer to section -7- "Inverter (TJMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 310)
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)
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 313)
Refer to IX [4] -7- (2) [2].(page 312)
Replace the INV board.
Check method and remedy
Check for proper mounting of ACCT.
Refer to IX [4] -7- (4).
Refer to IX [4] -7- (4).(page 316)
Refer to IX [4] -7- (2) [3], [4].(page 313)
Refer to IX [4] -7- (2) [2].(page 312)
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