Error Code [4260] (Tlmu); Error Code [4260] (Ylmu) - Mitsubishi Electric R410A Service Handbook

[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-5-28

Error Code [4260] (TLMU)

1. Error code definition
Heatsink overheat protection at startup
2. Error definition and error detection method
The heatsink temperature (THHS) remains at or above TOH for 10 minutes or more at inverter startup.
Refer to the relevant pages for the details of model names and the specified values. [7-1-1 Inverter Protection Level Ta-
ble](page 155)
Model
INV24
INV25
3. Cause, check method and remedy
Same as 4230 error
7-5-29

Error Code [4260] (YLMU)

1. Error code definition
Heatsink overheat protection at startup
2. Error definition and error detection method
The heatsink temperature (THHS) remains at or above 105°C [221°F] for 10 minutes or more at inverter startup.
3. Cause, check method and remedy
Same as 4230 error
HWE14080
TOH
100°C [212°F]
90°C [194°F]
- 190 - GB