Error Codes [4220, 4225, 4226] Detail Code 109 (Tlmu); Error Codes [4220, 4225, 4226] Detail Code 109 (Ylmu); Error Codes [4220, 4225, 4226] Detail Code 110 (Tlmu) - Mitsubishi Electric R410A Service Handbook

[7-5 Error Code Definitions and Solutions: Codes [4000 - 4999] ]
7-5-12

Error Codes [4220, 4225, 4226] Detail Code 109 (TLMU)

1. Error code definition
Abnormal bus voltage rise (Detail code 109)
2. Error definition and error detection method
If Vdc 400V is detected during inverter operation.
3. Cause, check method and remedy
(1) Different voltage connection
Check the power supply voltage on the power supply terminal block (TB1).
(2) INV board failure
If the problem recurs, replace the INV board or fan board.
In the case of 4220: INV board
In the case of 4225: Fan board
In the case of 4226: Fan board (Fan box side)
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems (TLMU)](page 264)
7-5-13

Error Codes [4220, 4225, 4226] Detail Code 109 (YLMU)

1. Error code definition
Abnormal bus voltage rise (Detail code 109)
2. Error definition and error detection method
If Vdc 830V is detected during inverter operation.
3. Cause, check method and remedy
(1) Different voltage connection
Check the power supply voltage on the power supply terminal block (TB1).
(2) INV board failure
If the problem recurs, replace the INV board or fan board.
In the case of 4220: INV board
In the case of 4225: Fan board
In the case of 4226: Fan board (Fan box side)
For inverter-related error codes, refer to the following page(s). [8-10 Troubleshooting Inverter Problems (YLMU)](page 276)
7-5-14

Error Codes [4220, 4225, 4226] Detail Code 110 (TLMU)

1. Error code definition
VDC error (Detail code 110)
2. Error definition and error detection method
Bus voltage abnormality If Vdc
3. Cause, check method and remedy
Same as detail code No.108 and 109 of 4220 error
For inverter-related error codes, refer to the following page(s). [8-9 Troubleshooting Inverter Problems (TLMU)](page 264)
HWE14080
400V or Vdc 160V is detected. (H/W detection)
- 178 - GB