Mitsubishi Electric PURY-P72 Service Handbook page 252

[ IX Troubleshooting ]
1. Error Code
5301 (TKMU-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 (TKMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 310)
1. Error Code
5301 (YKMU-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 (YKMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 321)
HWE1116D
Check method and remedy
Check output wiring connections.
Confirm that the U- and W-phase output cables are put through CT11
and CT12 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- (5).(page 317)
Refer to IX [4] -7- (5).(page 317)
Refer to IX [4] -7- (2) [3], [4].(page 313)
Refer to IX [4] -7- (2) [2].(page 312)
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 323)
Refer to IX [4] -7- (2) [2].(page 323)
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