[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
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HWE12050 GB
7 Troubleshooting Using Error Codes
7-6-13 Error Codes [4250, 4255, 4256] Detail Code 101
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 and 4256
IPM error signal is detected.
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) 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 Prob-
lems](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 Operation](page 237)
[8-9-10 Checking the Installation Conditions](page 239)
Check the IGBT module resistance value of the INV board, if no problems are
found.
[8-9-14 Troubleshooting Problems with IGBT Module](page 241)
(2) The model selection
switches (SW5-3 - 5-8) on
the outdoor unit are set
incorrectly.
Check the setting for the model selection switch on the outdoor unit (Dipswitches
SW5-3 - 5-8 on the outdoor unit control board).
For switch settings, refer to the following page(s). [7-9-2 Error Code [7101]](page
197)
Cause Check method and remedy
(1) Fan motor abnormality 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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