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VRF 50/60Hz
2.2 C0: Communica on fault between main board and communicate converter board (Only for 36/42
model)
2.2.1 Digital display output
C0
2.2.2 Descrip on
•
Communica on fault between main board and communicate converter board.
•
The system stops running.
•
Error code is displayed on the outdoor unit PCB.
2.2.3 Trigger / recover condi on
•
Trigger condi on: Communicate converter board and ODU main control board cannot communicate.
•
Recover condi on: Communica on go back to normal.
•
Reset method: Resume automa cally.
2.2.4 Possible causes
•
Interference from high voltage wires or other sources of electromagne c radia on.
•
Communicate converter board is damage.
•
Communicate wire port is loose or connecter surface is corrosive, or water drop lead to poor contact.
•
Communicate wire break or poor contact for reasons (such as rat beat, or bond and connection).
2.2.5 Procedure
Dismantle the connect wire between communicate converter
board and ODU main board, and then test the T and R port
voltage of the ODU main board to confirm whether it's 5V
Dismantle the T and R port between communicate converter
board and ODU main board, and then test the TR port voltage
of the communicate converter board to confirm whether it's 5V
Confirm the communica on port is loose or not, exclude
communica on problem, confirm there's no outer interference
50
C0
Yes
Yes
Outdoor unit main
No
board fault
Communicate
No
converter board
fault
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