GMV5 Home DC Inverter Multi VRF Units
269
2 The compressor drive board is faulty.
required range;
2 Replace the compressor drive
board.
Inverter compressor starting
failure
1 The drive board is faulty;
2 The compressor's UVW cable is not
connected properly;
3 The compressor is damaged.
1Replace the compressor drive
board;
2 Reconnect the compressor's
UVW cable;
3Replace the compressor.
Communication failure
between main control board
and variable frequency fan
drive
1The control board is powered off;
2The fan drive board is powered off;
3The communication cable between the
control board and fan drive board is not
connected;
4The fan drive board's dial switch is
wrong.
1Check the power supply of the
control board. Replace the
control board if it works properly;
2Check the power supply of the
drive board. Replace the drive
board if it works properly;
3Connect the main board and
drive board using the
communication cable;
4Adjust the dial switch of the fan
drive board.
Fan drive module reset
protection
1The fan drive board is faulty.
1Replace the fan drive board.
Inverter fan overcurrent
protection
1 The fan drive board's IPM module is
damaged;
2 The fan's UVW cable is not connected
properly;
3 The fan is damaged.
1 Replace the fan drive board;
2 Reconnect the fan's UVW
cable;
3 Replace the fan.
Fan drive IPM module
protection
1 The fan drive board's IPM module is
damaged;
2 The fan's UVW cable is not connected
properly;
3 The fan is damaged.
1 Replace the fan drive board;
2 Reconnect the fan's UVW
cable;
3 Replace the fan.
Fan drive temperature
sensor fault
1The fan drive board is faulty.
1Replace the fan drive board.
Fan drive IPM
over-temperature protection
1 The fan drive board is faulty;
2 Thermal gel is not applied evenly on the
IPM module;
3 The IPM module is not screwed
properly.
1Replace the fan drive board;
2 Apply thermal gel evenly on
the IPM module;
3Screw the IPM module
properly.
Inverter fan out-of-step
protection
The fan drive board is faulty.
Replace the fan drive board.
Fan drive DC bus high
voltage protection
1 Whether the voltage of the input power
cable of the whole system exceeds 460 V;
2 The fan drive board is faulty.
1Lower the voltage of the input
power cable to the required
range;
2Replace the fan drive board.