Cooper & Hunter CHV-5S224SNMX, Service Manual

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0 77 MAINTENACE
CHV
5 COM PACT MULTI VRF UNIT
SERVICE M ANUAL
2
FLOW CHART OF TROUBLE SHOOTING
2.1 Communication Error between the Compressor Drive Board and the Main Control Board
Communication error between the compressor drive board and the
main control board.
Check if the main control board and the compressor drive board
are powered on
Check if the communication line between the main control board and
the compressor drive board is connected well
Replace the main control board and see if the error is
eliminated
Replace the compressor drive board and see if the error is
eliminated.
It is finished
Check if the power cords of the main control board and the
compressor drive board are in good condition.
Make the connection of the communication line in good condition
and see if the error is eliminated
YES
NO
NO
NO
NO
YES