Error Codes [4250, 4255] Detail Code 104 - Mitsubishi Electric PURY-HP72 Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-25

Error Codes [4250, 4255] Detail Code 104

1. Error code definition
Short-circuited IPM/Ground fault (Detail code 104)
2. Error definition and error detection method
When IPM/IGBT short damage or grounding on the load side is detected just before starting the inverter.
3. Cause, check method and remedy
In the case of 4250
Cause
(1) Grounding fault
compressor
(2) Inverter output
related
In the case of 4255
Cause
(1) Grounding fault
of fan motor
(2) Fan board fail-
ure
For inverter-related error codes, refer to the following page(s).
[8-10 Troubleshooting Inverter Problems (TKMU)](page 288)
[8-11 Troubleshooting Inverter Problems (YKMU)](page 298)
HWE13080
Check method and remedy
Refer to the following page(s).
(TKMU)
[8-10-3 Checking the Compressor for Ground Fault and Coil Resistance Problems](page
290)
(YKMU)
[8-11-3 Checking the Compressor for Ground Fault and Coil Resistance Problems](page
300)
Refer to the following page(s).
(TKMU)
[8-10-2 Checking the Inverter Board Error Detection Circuit](page 290)
[8-10-3 Checking the Compressor for Ground Fault and Coil Resistance Problems](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)
(YKMU)
[8-11-2 Checking the Inverter Board Error Detection Circuit](page 300)
[8-11-3 Checking the Compressor for Ground Fault and Coil Resistance Problems](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 method and remedy
Refer to the following page(s).
(TKMU)
[8-10-6 Checking the Fan Motor for Ground Fault and Coil Resistance Problems](page 291)
(YKMU)
[8-11-6 Checking the Fan Motor for Ground Fault and Coil Resistance Problems](page 301)
Refer to the following page(s).
(TKMU)
[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)
(YKMU)
[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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