Mitsubishi Electric PUHY-P250YNW-A Service Handbook page 167

[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
7-7-8 Error Code [5301] Detail Code 119
1. Error code definition
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
Cause
(1) ACCT sensor disconnection
(2) ACCT sensor failure
(3) Inverter failure
(4) Compressor failure
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems]
7-7-9 Error Code [5301] Detail Code 120
1. Error code definition
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) ACCT sensor connection error
(2) ACCT sensor failure
(3) Inverter failure
(4) Compressor failure
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems]
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Check method and remedy
Check the connector CNCT2 on the INV board for proper connection.
Check the ACCT for proper connection.
Refer to the following page(s).
[8-9-14 Simple Check on Inverter Circuit Components]
Refer to the following page(s).
[8-9-4 Checking the Inverter for Damage at No-Load]
[8-9-5 Checking the Inverter for Damage during Compressor Opera-
tion]
Refer to the following page(s).
[8-9-3 Checking the Compressor for Ground Fault and Coil Resis-
tance Problems]
Check method and remedy
Check the ACCT for proper connection.
Refer to the following page(s). [8-9-14 Simple Check on Inverter Cir-
cuit Components]
Refer to the following page(s).
[8-9-14 Simple Check on Inverter Circuit Components]
Refer to the following page(s).
[8-9-4 Checking the Inverter for Damage at No-Load]
[8-9-5 Checking the Inverter for Damage during Compressor Opera-
tion]
Refer to the following page(s).
[8-9-3 Checking the Compressor for Ground Fault and Coil Resis-
tance Problems]
BS_07_C