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[ IX Troubleshooting ]
- 152 -
HWE08040 GB
[2] Responding to Error Display on the Remote Controller
1. Error Code
Serial communication error
2. Error definition and error detection method
Serial communication error between the control board and the INV board on the compressor, and between the control board
and the Fan board
Detail code 01: Between the control board and the INV board
Detail code 05: Between the control board and the Fan board
3. Cause, check method and remedy
(1) Faulty wiring
Check the following wiring connections.
1) Between Control board and Fan board
2) Between Fan board and INV board
(2) INV board failure, Fan board failure and Control board failure
Replace the INV board or the Fan board or control board when the power turns on automatically, even if the power source is
reset.
Refer to section -6- "Inverter (THMU-A)" under part [4] Troubleshooting Principal Parts for error codes related to the
inverter.(page 244)
0403 (THMU-A)
CN2
CN21
CN4
CN4
CN332
CN18V
Control board FAN board
CN22 CN2
CN5V
CN4 CN4
FAN board INV board