Error Code [5301] Detail Code 119 (Ykmu); Error Code [5301] Detail Code 120 (Tkmu) - Mitsubishi Electric PURY-HP72 Service Handbook

[7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
7-7-14

Error Code [5301] Detail Code 119 (YKMU)

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) Inverter output wiring problem
(2) Inverter failure
(3) Compressor failure
For inverter-related error codes, refer to the following page(s). [8-11 Troubleshooting Inverter Problems (YKMU)](page 298)
7-7-15

Error Code [5301] Detail Code 120 (TKMU)

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. (Detection of
improperly mounted ACCT sensor)
3. Cause, check method and remedy
Cause
(1) Wrongly mounted
ACCT sensor
(2) ACCT sensor failure
(3) Inverter failure
(4) Compressor failure
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems (TKMU)](page 288)
HWE13080
Check method and remedy
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 the following page(s).
[8-11-4 Checking the Inverter for Damage at No-Load](page 300)
[8-11-5 Checking the Inverter for Damage during Compressor Opera-
tion](page 301)
Refer to the following page(s).
[8-11-3 Checking the Compressor for Ground Fault and Coil Resistance Prob-
lems](page 300)
Check method and remedy
Check for proper mounting of ACCT.[8-10-13 Simple Check on Inverter Circuit Com-
ponents](page 295)
[8-10-13 Simple Check on Inverter Circuit Components](page 295)
Refer to the following page(s).
[8-10-4 Checking the Inverter for Damage at No-Load](page 290)
[8-10-5 Checking the Inverter for Damage during Compressor Operation](page 291)
Refer to the following page(s).
[8-10-3 Checking the Compressor for Ground Fault and Coil Resistance Prob-
lems](page 290)
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