LG Multi V Water IV - Error Code Tables: Water Source Unit Errors (Part 2); Water Source Unit Error Codes (Section 2)

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MULTI V Water IV System Installation Manual
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Error Code Description Possible Cause
3 2 – 1
Master WSU inverter compressor discharge
temperature high
• Compressor turned off due to Master WSU inverter compressor
discharge temperature too high
• Master WSU ow rate insufcient or ow switch error
3 2 – 2
Slave 1 WSU inverter compressor discharge
temperature too high
• Compressor turned off due to Slave 1 WSU inverter compressor
discharge temperature too high
• Master WSU ow rate insufcient or ow switch error
3 2 – 3
Slave 2 WSU inverter compressor discharge
temperature too high
• Compressor turned off due to Slave 2 WSU inverter compressor
discharge temperature too high
• Slave 2 WSU ow rate insufcient or ow switch error
3 4 – 1 Master WSU high pressure too high
• Compressor turned off due to Master WSU high pressure too high
• Master WSU ow rate insufcient or ow switch error
3 4 – 2 Slave 1 WSU high pressure too high
• Compressor turned off due to Slave 1 WSU high pressure too high
• Slave 1 WSU ow rate insufcient or ow switch error
3 4 – 3 Slave 2 WSU high pressure too high
• Compressor turned off due to Slave 2 WSU high pressure too high
• Slave 2 WSU ow rate insufcient or ow switch error
3 5 – 1 Master WSU low pressure too low Compressor turned off due to Master WSU low pressure too low
3 5 – 2 Slave 1 WSU low pressure too low Compressor turned off due to Slave 1 WSU low pressure too low
3 5 – 3 Slave 2 WSU low pressure too low Compressor turned off due to Slave 2 WSU low pressure too low
3 6 – 1 Master WSU low pressure ratio Master WSU pressure ratio is under limit
3 6 – 2 Slave 1 WSU low pressure ratio Slave 1 WSU pressure ratio is under limit
3 6 – 3 Slave 2 WSU low pressure ratio Slave 2 WSU pressure ratio is under limit
4 0 – 1 Master WSU inverter compressor CT sensor error
Master WSU inverter compressor current detection (CT) sensor
disconnection or short circuit
4 0 – 2 Slave 1 WSU inverter compressor CT sensor error
Slave 1 WSU inverter compressor current detection (CT) sensor
disconnection or short circuit
4 0 – 3 Slave 2 WSU inverter compressor CT sensor error
Slave 2 WSU inverter compressor current detection (CT) sensor
disconnection or short circuit
4 1 – 1
Master WSU inverter compressor discharge
temperature sensor error
Master WSU inverter compressor discharge temperature sensor
disconnection or short circuit
4 1 – 2
Slave 1 WSU inverter compressor discharge
temperature sensor error
Slave 1 WSU inverter compressor discharge temperature sensor
disconnection or short circuit
4 1 – 3
Slave 2 WSU inverter compressor discharge
temperature sensor error
Slave 2 WSU inverter compressor discharge temperature sensor
disconnection or short circuit
4 2 – 1 Master WSU under-voltage sensor error Master WSU under-voltage sensor disconnection or short circuit
4 2 – 2 Slave 1 WSU under-voltage sensor error Slave 1 WSU under-voltage sensor disconnection or short circuit
4 2 – 3 Slave 2 WSU under-voltage sensor error Slave 2 WSU under-voltage sensor disconnection or short circuit
4 3 – 1 Master WSU over-voltage sensor error Master WSU over-voltage sensor disconnection or short circuit
4 3 – 2 Slave 1 WSU over-voltage sensor error Slave 1 WSU over-voltage sensor disconnection or short circuit
Table 76: Water Source Unit Error Codes - continued
ERROR CODE TABLES