GMV5 Home DC Inverter Multi VRF Units
270
Fan drive DC bus low
voltage protection
1 Is the voltage of the input power cable
of the whole system lower than 320 V;
2Is the fan drive board well connected
with the compressor drive board;
3The fan drive board is faulty.
1Elevate the voltage of the input
power cable to the required
range;
2Connect the fan drive board
with the compressor drive board
according to the wiring diagram;
3Replace the fan drive board.
Fan drive current detection
circuit fault
1 The fan drive board is faulty.
1Replace the fan drive board.
1 The drive board is damaged;
2 The fan's UVW cable is not connected
properly;
3 The fan is damaged.
1Replace the fan drive board;
2Reconnect the fan's UVW
cable;
3Replace the fan.
4.1.2 System faults
4.1.2.1 System exhaust temperature exception
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