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

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[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-22

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

1. Error code definition
IPM error (Detail code 101)
2. Error definition and error detection method
In the case of 4250
Overcurrent is detected by the overcurrent detection resistor (RSH) on the INV board.
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
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). [8-11 Troubleshooting Inverter Problems (YKMU)](page 298)
HWE13080
Check method and remedy
Refer to the following page(s).
[8-11-2 Checking the Inverter Board Error Detection Circuit](page 300)
[8-11-3 Checking the Compressor for Ground Fault and Coil Resistance Prob-
lems](page 300)
[8-11-4 Checking the Inverter for Damage at No-Load](page 300)
[8-11-5 Checking the Inverter for Damage during Compressor Operation](page
301)
[8-11-10 Checking the Installation Conditions](page 303)
Check the IGBT module resistance value of the INV board, if no problems are
found.
[8-11-14 Troubleshooting Problems with IGBT Module](page 305)
Check method and remedy
Refer to the following page(s). [8-11-6 Checking the Fan Motor for Ground Fault
and Coil Resistance Problems](page 301)
Refer to the following page(s).
[8-11-7 Checking the Fan Board Error Detection Circuit at No Load](page 301)
[8-11-8 Checking the Fan Inverter for Damage at No Load](page 302)
[8-11-9 Checking the Fan Inverter for Damage with Load](page 303)
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