GMV5 Home DC Inverter Multi VRF Units
297
Check if the control board
and compressors drive board
are powered
Check if the control board and compressors
drive board are well connected to each other with
communication cable.
Check if the dial switch of
the compressors drive board
is correct.
Replace the main control
board. Is the fault solved?
Drive board of compressor is
faulty, replace the drive board
If the LED of the control board is off,
replace the control board; if the LED of
the drive board is off, replace the drive
board.
If not, reconnect them. If the cable is not
conducting, replace the cable.
Adjust the drive boards dial switch as
required.