Gree GMV5E Series Service Manual page 137

GREE
Fault
Fault
code
Inverter compressor
P9
out-of-step protection
Compressor drive DC
PH bus high voltage
protection
Compressor drive DC
PL bus low voltage
protection
Compressor drive
PC current check circuit
fault
Compressor drive
PF recharging circuit
fault
Inverter compressor
PJ
starting failure
Communication
failure between main
C3 control board and
variable frequency
fan drive
Fan drive module
H3
reset protection
Variable frequency
H5 fan over-current
protection
Fan drive IPM
H6
module protection
Fan drive
H7 temperature sensor
fault
Fan drive IPM
H8 over-temperature
protection
Variable frequency
H9 fan out-of-step
protection
Fan drive DC bus
HH high voltage
protection
Fan drive DC bus low
HL
voltage protection
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
Possible reasons
The compressor drive board is faulty.
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 off;
3.The communication cable between the
control board and fan drive board is not
connected;
4.The fan drive board's dial switch is
wrong.
1.The fan drive board is faulty.
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.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.The fan drive board is faulty.
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.
The fan drive board is faulty.
The fan is damaged.
1.Does the voltage of the input power
cable of the whole system exceed 460 V;
2.The fan drive board is faulty.
1.Is the voltage of the input power cable
of the whole system lower than 320 V;
2.Is the fan drive board well connected
with the compressor drive board;
133
Solution
Replace the compressor drive board.
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 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 fan drive
board.
1.Replace the fan drive board.
1.Replace the fan drive board;
2.Reconnect the fan's UVW cable;
3.Replace the fan.
1.Replace the fan drive board;
2.Reconnect the fan's UVW cable;
3.Replace the fan.
1.Replace the fan drive board.
1.Replace the fan drive board;
2.Apply thermal gel evenly on the IPM
module;
3.Screw the IPM module properly.
Replace the fan drive board.
Replace the fan.
1.Lower the voltage of the input power
cable to the required range;
2.Replace the fan drive board.
1.Elevate the voltage of the input power
cable to the required range;
2.Connect the fan drive board with the
compressor drive board according to the