Mitsubishi Electric PUHY-P72 Service Manual page 197

[ IX Troubleshooting ]
1. Error Code
5301 (THMU-A)
ACCT sensor fault (Detail code 115)
2. Error definition and error detection method
When the formula "output current < 2 Arms" remains satisfied for 10 seconds while the inverter is in operation.
3. Cause, check method and remedy
P72 and P96 models
Cause
(1) Inverter open output phase
(2) Compressor failure
(3) INV board failure
P120 model
Cause
(1) Inverter open output phase
(2) Compressor failure
(3) INV board failure
(4) Contact failure
(5) ACCT sensor failure
Refer to section -6-"Inverter (THMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 244)
HWE0804A
Check method and remedy
Check the output wiring connections.
Refer to IX [4] -6- (2) [2].(page 246)
Refer to IX [4] -6- (2) [1], [3], [4].(page 246)
Check method and remedy
Check the output wiring connections.
Refer to IX [4] -6- (2) [2].(page 246)
Refer to IX [4] -6- (2) [1], [3], [4].(page 246)
Check the connection of the connector (CNCT2) on the INV board-
INV board.
Refer to IX [4] -6- (4).
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