Mitsubishi Electric PUHY-P72 Service Manual page 198

[ IX Troubleshooting ]
1. Error Code
5301 (YHMU-A)
ACCT sensor fault (Detail code 115)
2. Error definition and error detection method
When the formula "output current < 1.5 Arms" remains satisfied for 10 seconds while the inverter is in operation.
3. Cause, check method and remedy
Cause
(1) Inverter open output phase
(2) Compressor failure
(3) INV board failure
Refer to section -6-"Inverter (YHMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 252)
1. Error Code
5301 (THMU-A)
DCCT sensor fault (Detail code116)
2. Error definition and error detection method
When the bus current less than 18 Apeak is detected at startup (6Hz)
3. Cause, check method and remedy
Cause
(1) Contact failure
(2) Misorientation
(3) DCCT sensor failure
(4) INV board 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
ACCT sensor circuit fault (Detail code 117)
2. Error definition and error detection method
When an error value is detected with the ACCT detection circuit just before the inverter starts
3. Cause, check method and remedy
Cause
(1) INV board failure
(2) Compressor failure
Refer to section -6-"Inverter" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.
HWE0804A
Check the output wiring connections.
Refer to IX [4] -6- (2) [2].(page 254)
Refer to IX [4] -6- (2) [1], [3], [4].(page 254)
(P120 model only)
Check the contact of the connector (CNCT) on the INV board, and the
contact the connector on DCCT side.
Check the installation direction of DCCT.
Replace the DCCT sensor.
Replace the INV board.
Refer to IX [4] -6- (2) [1], [3], [4].
Refer to IX [4] -6- (2) [2].
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Check method and remedy
Check method and remedy
Check method and remedy
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