Mitsubishi Electric PUHY-HP144TSHMU-A Service Handbook page 155

[ IX Troubleshooting ]
1. Error Code
5301
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
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" under part [4] "Trouble shootiong principal parts" for error codes related to the
inverter.(page 196)
1. Error Code
5301
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" under part [4] Troubleshooting Principal Parts for error codes related to the inverter.(page 196)
HWE0716A
Check method and remedy
Check the output wiring connections.
Refer to 9 [4]-6-(2)[2].(page 198)
Refer to 9 [4]-6-(2)[1].(page 198)
Check the connection of the connector (CNCT2) on the INV board.
Refer to 9 [4]-6-(4).(page 201)
Check method and remedy
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.
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