Error Code [4250] Detail Codes 121, 128, And 122; Error Code [4260] - Mitsubishi Electric PUHY-P200 Service Handbook

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

Error Code [4250] Detail Codes 121, 128, and 122

1. Error code definition
DCL overcurrent error (H/W) (Detail code 121 and 128)(outdoor unit) DCL overcurrent error (S/W) (Detail code 122)
(outdoor unit)
2. Error definition and error detection method
When a DCL overcurrent is detected by the electric current sensor
3. Cause, check method and remedy
Cause
(1) Inverter-output-related
items
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems](page 264)
7-6-23

Error Code [4260]

1. Error code definition
Heatsink overheat protection at startup
2. Error definition and error detection method
When heatsink temperature (THHS) remains at or above TOH for 10 minutes or longer after inverter startup
models
INV20Y
INV30YC
3. Cause, check method and remedy
Same as 4230 error
HWE14040
Refer to the following page(s). [8-9-2 Checking the Inverter Board Error Detection
Circuit](page 266)
Refer to the following page(s). [8-9-3 Checking the Compressor for Ground Fault
and Coil Resistance Problems](page 266)
Refer to the following page(s). [8-9-4 Checking the Inverter for Damage at No-
Load](page 266)
Refer to the following page(s). [8-9-5 Checking the Inverter for Damage during Com-
pressor Operation](page 267)
Refer to the following page(s). [8-9-11 Checking the Installation Conditions](page
271)
TOH
105˚C
94˚C
Check method and remedy
- 197 -
GB