Mitsubishi Electric PURY-P120TJMU-A, Service Handbook, Page: 251 / 411

[
IX
Troubleshooting ]
- 242 - HWE0913A GB
1. Error Code
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
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
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
P96, P120, P144 models
Refer to section -7- "Inverter (TJMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 310)
5301 (YJMU-A)
Cause Check method and remedy
(1) Inverter output wiring problem Check output wiring connections.
Confirm that the U- and W-phase output cables are put through CT12
and CT22 on the INV board respectively.
(2) Inverter failure Refer to IX [4] -7- (2) [3], [4].(page 322)
(3) Compressor failure Refer to IX [4] -7- (2) [2].(page 322)
5301 (TJMU-A)
Cause Check method and remedy
(1) Inverter output wiring problem Check output wiring connections.
Confirm that the U- and W-phase output cables are put through CT12
and CT22 on the INV board respectively.
(2) Inverter failure Refer to IX [4] -7- (2) [3], [4].(page 313)
(3) Compressor failure Refer to IX [4] -7- (2) [2].(page 312)
(4) INV board failure Replace the INV board.
Cause Check method and remedy
(1) Wrongly mounted ACCT sensor Check for proper mounting of ACCT.
Refer to IX [4] -7- (4).
(2) ACCT sensor failure Refer to IX [4] -7- (4).(page 316)
(3) Inverter failure Refer to IX [4] -7- (2) [3], [4].(page 313)
(4) Compressor failure Refer to IX [4] -7- (2) [2].(page 312)