[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
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HWE12050 GB
7 Troubleshooting Using Error Codes
7-6-15 Error Codes [4250, 4255, 4256] 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
In the case of 4255 and 4256
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems](page 234)
Cause Check method and remedy
(1) Grounding fault compressor Refer to the following page(s).
[8-9-3 Checking the Compressor for Ground Fault and Coil Resistance
Problems](page 236)
(2) Inverter output related Refer to the following page(s).
[8-9-2 Checking the Inverter Board Error Detection Circuit](page 236)
[8-9-3 Checking the Compressor for Ground Fault and Coil Resistance
Problems](page 236)
[8-9-4 Checking the Inverter for Damage at No-Load](page 236)
[8-9-5 Checking the Inverter for Damage during Compressor Opera-
tion](page 237)
[8-9-10 Checking the Installation Conditions](page 239)
Cause Check method and remedy
(1) Grounding fault of fan motor Refer to the following page(s).
[8-9-6 Checking the Fan Motor for Ground Fault and Coil Resistance
Problems](page 237)
(2) Fan board failure Refer to the following page(s).
[8-9-7 Checking the Fan Board Error Detection Circuit at No Load](page
237)
[8-9-8 Checking the Fan Inverter for Damage at No Load](page 238)
[8-9-9 Checking the Fan Inverter for Damage with Load](page 239)
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