Mitsubishi Electric PUHY-P72THMU-A Service Handbook page 199

[ IX Troubleshooting ]
1. Error Code
5301 (THMU-A)
DCCT sensor circuit fault (Detail code118)
2. Error definition and error detection method
When an error value is detected with the DCCT detection circuit just before the inverter starts
3. Cause, check method and remedy
Cause
(1) Contact failure
(2) INV board failure
(3) DCCT sensor failure
(4) Compressor failure
(5) Inverter failure
Refer to section -6- "Inverter (THMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 244)
1. Error Code
5301 (THMU-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
P72 and P96 models
Cause
(1) Inverter output wiring problem
(2) Inverter failure
(3) Compressor failure
P120 model
Cause
(1) ACCT sensor disconnection
(2) ACCT sensor failure
(3) Inverter failure
(4) Compressor failure
Refer to section -6- "Inverter (THMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 244)
HWE08040
(P120 model only)
Check for good contact of the INV board connector CNCT and the connec-
tor on the DCCT side.
Refer to IX [4] -6- (2) [1], [3], [4].(page 246)
Replace the DCCT sensor.
Refer to IX [4] -6- (2) [2].(page 246)
Refer to IX [4] -6-.(page 244)
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] -6- (2) [3], [4].(page 247)
Refer to IX [4] -6- (2) [2].(page 246)
Check the connection of the connector (CNCT2) on the INV board.
Check for proper mounting of ACCT.
Refer to IX [4] -6- (4).(page 249)
Refer to IX [4] -6- (2) [3], [4].(page 247)
Refer to IX [4] -6- (2) [2].(page 246)
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Check method and remedy
Check method and remedy
Check method and remedy
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