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V8 VRF Indoor Units
6.1.19 C61 - Abnormal communication between the IDU main control board and display control board
Note: The error code C61 can be triggered either at the IDU side or at the panel or display box side.
Error display
The faulty IDU and other IDUs of the same system: operate normally.
Error impact
ODU of the same system: operate normally.
Error trigger
Error recovery
Automatic recovery
Possible cause
Troubleshooting
66
Digital display
Triggered at the IDU side: If the main control board of the IDU has been connected to the display
board but has not communicated with the display board for 2 min;
Triggered at panel or display box side: If the display board has not received any reply from the main
control board of an IDU for 1 min
The display control board is damaged.
The IDU main control board is damaged.
The communication cable between the display control board and the IDU main control board has
become loose.
C61
Triggered at the IDU side
Panel, display box, and
wired controller
Cause 1: The communication
cable between the display control
board and the IDU main control
board has become loose
Cause 2: The IDU main control
board is damaged
Cause 3: The display control board
is damaged
Display position
Triggered at the panel or
display box side
Panel, display box, and
wired controller
Reconnect the loose
plug
Replace the main
control board of the
IDU
Replace the display
control board
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