Gree GMV-Pdm450W/NaB-M

186
DC Inverter Multi
VRF Service Manual
9) Solution to the Communication Error of the Fan Motor Drive Board
It is finished
Communication Error
between the Fan Drive Board
and Main Control Board
Check if both the main control
board and the fan motor drive board
are powered on
Check the communication line
between the fan motor drive board
and the main control board is
connected properly
Check if the power cords of
the fan motor drive board and
the main control board are
connected properly
NO
YES
YES
YES
Connect the communication
line properly and see if the
error is eliminated
NO
Replace the main control board
and see if the error is eliminated
NO
NO
Replace the fan motor drive
board and see if the error is
eliminated
10) Solution to the Fan Motor Overheating Protection
It is finished
Fan Motor Overheating
Protection
Check if the overheating
protective resistance of the fan motor
is 0 or if the grounding of the fan
motor is shortcut
Replace the fan motor drive
board
Replace the motor
YES
NO