Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 218

[7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-6-28 Error Code [4250, 4255, 4256] Detail Code 106 and 107
1. Error code definition
Instantaneous overcurrent (Detail code 106)
Overcurrent (effective value) (Detail code 107)
2. Error definition and error detection method
When a current above the specified value is detected by the electric current sensor.
Refer to the relevant pages for the details of model names and the specified values.
3. Cause, check method and remedy
[Outdoor unit]
In the case of 4250
Cause
(1) Inverter output related
(2) The model selection
switches (SW5-3 - 5-8) on
the outdoor unit are set in-
correctly.
In the case of 4255 and 4256
Cause
(1) Fan board failure
(2) Outdoor unit fan failure
(3) Air passage blockage
(4) The model selection
switches (SW5-3 - 5-8) on
the outdoor unit are set in-
correctly.
BS_07_M
Check method and remedy
Refer to the following page(s).
[8-10-2 Checking the Inverter Board Error Detection Circuit]
[8-10-3 Checking the Compressor for Ground Fault and Coil Resistance Prob-
lems]
[8-10-4 Checking the Inverter for Damage at No-Load]
[8-10-5 Checking the Inverter for Damage during Compressor Operation]
[8-10-15 Checking the Installation Conditions]
Check the IGBT module resistance value of the INV board, if no problems are
found.
[8-10-19 Troubleshooting Problems with IGBT Module]
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]]
Check method and remedy
Refer to the following page(s).
[8-10-8 Checking the Fan Board Error Detection Circuit at No Load]
[8-10-9 Checking the Fan Board for Damage at No Load]
[8-10-10 Checking the Fan Board for Damage with Load]
Check the outdoor unit fan for proper operation.
Check the fan motor if problems are found with the operation of the fan.
Refer to the following page(s). [8-10-7 Checking the Fan Motor for Ground Fault
and Coil Resistance Problems]
Check that the heat sink cooling air passage is not blocked
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]]
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