Gree GMV5 Series Service Manual page 138

Communication
failure between
C2 main control board
and inverter
compressor drive
Compressor drive
P3 module reset
protection
Inverter compressor
P5 over-current
protection
Compressor drive
P6 IPM module
protection
Compressor drive
P7 temperature sensor
fault
Compressor drive
IPM
P8
over-temperature
protection
Inverter compressor
P9 out-of-step
protection
Compressor drive
PH DC bus high voltage
protection
Compressor drive
PL DC bus low voltage
protection
Compressor drive
PC current check circuit
fault
Compressor drive
PF recharging circuit
fault
Inverter compressor
PJ
starting failure
Communication
C3
failure between
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
1. The control board is powered off;
2. The compressor drive board is
powered off;
3. The communication
between the control board and
compressor drive board is not
connected;
4. The compressor drive board's
dial switch SA201 is wrong.
1. The compressor drive board is
faulty.
1. The drive board's IPM module is
damaged;
2. The compressor's UVW cable is
not connected properly;
3. The compressor is damaged.
1. The drive board's IPM module is
damaged;
2. The compressor's UVW cable is
not connected properly;
3. The compressor is damaged.
1. The compressor drive board is
faulty.
1. The compressor drive board is
faulty;
2. Thermal gel is not applied evenly
on the IPM module;
3. The IPM module is not screwed
properly.
1. The compressor drive board is
faulty.
2. The compressor is damaged.
1. Does the voltage of the input
power cable of the whole system
exceed 460 V;
2. The compressor drive board is
faulty.
1. Is the voltage of the input power
cable of the whole system lower
than 320 V;
2. The compressor drive board is
faulty.
1. The compressor drive board is
faulty.
1. Is the voltage of the input power
cable of the whole system lower
than 280 V;
2. The compressor drive board is
faulty.
1. The drive board is damaged;
2. The compressor's UVW cable is
not connected properly;
3. The compressor is damaged.
1. The control board is powered off;
2. The fan drive board is powered
1. Check the power supply of the control
board. Replace the control board if it
works properly;
2. Check the power supply of the drive
cable
board. Replace the drive board if it
works properly;
3. Connect the main board and drive
board using the communication cable;
4. Adjust the dial switch of the
compressor drive board.
1. Replace the compressor drive board.
1. Replace the compressor drive board;
2. Reconnect the compressor's UVW
cable;
3. Replace the compressor.
1. Replace the compressor drive board;
2. Reconnect the compressor's UVW
cable;
3. Replace the compressor.
1. Replace the compressor drive board.
1. Replace the compressor drive board;
2. Apply thermal gel evenly on the IPM
module;
3. Screw the IPM module properly.
1. Replace
board.
2. Replace the compressor.
1. Lower the voltage of the input power
cable to the required range;
2. Replace the compressor drive board.
1. Elevate the voltage of the input power
cable to the required range;
2. Replace the compressor drive board.
1. Replace the compressor drive board.
1. Elevate the voltage of the input power
cable to the required range;
2. Replace the compressor drive board.
1. Replace the compressor drive board;
2. Reconnect the compressor's UVW
cable;
3. Replace the compressor.
1. Check the power supply of the control
board. Replace the control board if it
135
the compressor drive