Error Code [5110] (Tlmu); Error Code [5110] (Ylmu) - Mitsubishi Electric R410A Service Handbook

[7-6 Error Code Definitions and Solutions: Codes [5000 - 5999] ]
7-6-3

Error Code [5110] (TLMU)

1. Error code definition
(P96, P120, P144 models only)
Heatsink temperature sensor (THHS) fault (Detail code 01)
2. Error definition and error detection method
When a short or an open of THHS is detected just before or during the inverter operation.
3. Cause, check method and remedy
P72, P96, P120, P144 models
Cause
(1) INV board failure
P168 model
Cause
(1) THHS sensor failure
(2) Contact failure
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems (TLMU)](page 264)
7-6-4

Error Code [5110] (YLMU)

1. Error code definition
Heatsink temperature sensor (THHS) fault (Detail code 01)
2. Error definition and error detection method
When a short or an open of THHS is detected just before or during the inverter operation.
3. Cause, check method and remedy
Cause
(1) INV board failure
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems (YLMU)](page 276)
HWE14080
Check method and remedy
If the problem recurs when the unit is put into operation, replace
the INV board.
Check method and remedy
Check the THHS sensor reading on the LED monitor.
Replace the sensor if it reads below - 30°C [ -22°F] or above
150°C[302°F].
Check the connector connection (CNTH) on the INV board.
Check method and remedy
If the problem recurs when the unit is put into operation, replace the INV board.
- 193 - GB