Gree GMV5 Series Service Manual page 139

main 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
HL low voltage
protection
Fan drive current
HC
detection circuit fault
Variable frequency
HJ
fan starting failure
2. System faults
2.1 System exhaust temperature exception
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
off;
3. The communication
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.
1. The fan drive board is faulty.
2. 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;
3. The fan drive board is faulty.
1. The fan drive board is faulty.
1. The drive board is damaged;
2. The fan's UVW cable is not
connected properly;
3. The fan is damaged.
works properly;
cable 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.
1. Replace the fan drive board.
2. 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
wiring diagram;
3. Replace 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.
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