AUX-DC inverter ARV outdoor unit individual series technical manual
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The communication
between PCB and INV
module failure
1. Open or short circuit between driving module and main PCB
2. The communication part of outdoor control PCB failure
3. INV module is broken.
Outdoor unit main PCB
ERROM module failure
1. Power supply for main PCB andtransformer is abnormal*
2. The transformer is damaged
3. Outdoor main PCB is damaged
1. Supply voltage exceed limit.
2. High operation current.
Module hardwareprotection
INV module is damaged by high temperature or strong current.
Module software protection
High temperature of inverter module caused by overload or the
outdoor fan motor is abnormal.
1. Incorrect connectionbetween inverter module andcompressor.
2. INV module failure.
3. Compressor failure.
Compressor phase current
overload protection
1. Compressor overload
2. Inverter module failure
3. Compressor failure
4. Power supply is abnormal.
DC generatrix low or high
voltage error
1. Supply voltage is lower than 420V or higher than 642V.
2. Inverter module failure
Inverter module highTemp.
shutdown protection
1. Temperature of inverter module is higher than 94℃because of
high operation current or outdoor fan motor failure.
2. Inverter compressor failure.
3. Temperature sensor failure
1. Open or short circuit of communication wire between indoor units.
2. Indoor PCB failure
3. Some indoor units are power off when the system is power on.