Gree Ultra Heat GMV Multi VRF Heat Recovery Series Service Manual page 130

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial
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
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 current
HC
detection circuit fault
Variable frequency
HJ
fan starting failure
NOTE: C5 fault means IDUs project numbers conflict with each other, which may happens in a
cooling system or in different cooling systems controlled in a centralized way. Solution of C5 fault has
two ways, one way is changing conflicting project numbers by wired controller according to owner's
power cable of the whole system
exceed 800 V;
2) The compressor drive board is
faulty.
1) Is the voltage of the input power
cable of the whole system lower
than 100 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 60 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 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) 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.
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) 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) 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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