Gree GMV-Pdm450W/NaB-M

182
DC Inverter Multi
VRF Service Manual
2�9 Typical troubleshooting (E5) for DC frequency conversion drive board
When the error E5 arises, please rstly check the LED status of the main control board, drive board of the fan motor,
and also drive board of the compressor, after that, conrm what the error is through the error list, nally check out and
eliminate the error.
1) Solution to the 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
Check if the power cords of the
main control board and the
compressor drive board are in
good condition.
NO
YES
NO
Replace the main control board
and see if the error is eliminated.
NO
Replace the compressor
drive board and see if the error is
eliminated.
Make the connection of the
communication line in good
condition and see if the error is
eliminated
NO
It is finished
NO
YES