Error Codes [4250, 4255] Detail Code 101 (Tkmu) - Mitsubishi Electric PURY-HP72 Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-21

Error Codes [4250, 4255] Detail Code 101 (TKMU)

1. Error code definition
IPM error (Detail code 101)
2. Error definition and error detection method
In the case of 4250
IPM error signal is detected.
In the case of 4255
IPM error signal is detected.
3. Cause, check method and remedy
In the case of 4250
Cause
(1) Inverter output related
(2) Same as 4230 error
In the case of 4255
Cause
(1) Fan motor abnormality
(2) Fan board 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
Refer to the following page(s).
[8-10-2 Checking the Inverter Board Error Detection Circuit](page 290)
[8-10-3 Checking the Compressor for Ground Fault and Coil Resistance Prob-
lems](page 290)
[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)
[8-10-10 Checking the Installation Conditions](page 293)
Same as 4230 error
Check method and remedy
Refer to the following page(s). [8-10-6 Checking the Fan Motor for Ground Fault and
Coil Resistance Problems](page 291)
Refer to the following page(s).
[8-10-7 Checking the Fan Board Error Detection Circuit at No Load](page 291)
[8-10-8 Checking the Fan Inverter for Damage at No Load](page 292)
[8-10-9 Checking the Fan Inverter for Damage with Load](page 293)
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