Gree GMV-400WM/B-X - Page 138

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