[7-2 Error Code Definitions and Solutions: Codes [0 - 999] ]
7-2
Error Code Definitions and Solutions: Codes [0 - 999]
7-2-1
Error Code [0403]
1. Error code definition
Serial communication error
2. Error definition and error detection method
[Outdoor unit]
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 1: Between the control board and the INV board
Detail code 5, 6: Between the control board and the Fan board
[HBC]
Serial communication error between the control board and the pump INV board, between the control board and the power-
supply board, and between the control board and the valve block board
Detail code 05, 06: Between the control board and the pump INV board
Detail code 08: Between the control board and the power-supply board
Detail code X1, X2, X4: Between the control board and the valve block board (X=0, 2, 3, 4, 5)
3. Cause, check method and remedy
[Outdoor unit]
(1) Faulty wiring
Check the following wiring connections.
1) Between Control board and Fan board
Control board
CN4A
CN4B
2) Between control board and INV board
Control board
CN4
3) Between power-supply board and INV board
Power-supply board
CNINV
4) Between power-supply board and Fan board
Power-supply board
CNFAN1
CNFAN2
(2) PS board failure
Replace the PS board if the LED on the INV board, Fan board, or control board is not lit.
Using the detail codes, check the status of the LEDs on the circuit boards below.
Detail code 1: LED on the INV board
Detail code 5: LED on the right Fan board
Detail code 6: LED on the left Fan board
*When the power-supply board is normal, all LEDs will be lit.
(3) INV board failure, Fan board failure and Control board failure
If the problem persists after a power reset, replace the INV board, FAN board, or control board.
8
- chapter 7
FAN board
CN80
CN80
INV board
CN2
INV board
CN19V
FAN board
CN81
CN81
BS_07_M
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