GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
133
Fault
code
Fault
Possible reasons
Solution
P9
Inverter compressor
out-of-step protection
The compressor drive board is faulty.
The compressor is damaged.
Replace the compressor drive board.
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 main
control board and
variable frequency
fan drive
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.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.
H3
Fan drive module
reset protection
1.The fan drive board is faulty.
1.Replace the fan drive board.
H5
Variable frequency
fan over-current
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.
H6
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.
H7
Fan drive
temperature sensor
fault
1.The fan drive board is faulty.
1.Replace the fan drive board.
H8
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.
1.Replace the fan drive board;
2.Apply thermal gel evenly on the IPM
module;
3.Screw the IPM module properly.
H9
Variable frequency
fan out-of-step
protection
The fan drive board is faulty.
The fan is damaged.
Replace the fan drive board.
Replace the fan.
HH
Fan drive DC bus
high voltage
protection
1.Does the voltage of the input power
cable of the whole system exceed 460 V;
2.The fan drive board is faulty.
1.Lower the voltage of the input power
cable to the required range;
2.Replace the fan drive board.
HL
Fan drive DC bus low
voltage protection
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;
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
