DC inverter ARV Individual Series technical manual
85
IPM protection
The sensor detects the temp. of IMP, and send the data to the main PCB.3 minutes later the machine can
start up after stop, if the protection happens 3 times in one hour, the outdoor unit should be powered on
again to start up.
High pressure protection
When the discharge pressure is too high, the compressor will reduce the running frequency.
When pressure is more than 38bar, compressor can reduce the running frequency, and when the
pressure is less than 37bar, the compressor can increase the frequency.
10s late protection happen.3 minutes later can start up;
3-time protection in 60 minutes, should reset the outdoor.
Reduced by 2rps/s
Reduced by 1rps/s
Reduced by 1rps/10s
Constant frequency
Increase by1rps/10s
Normal operation
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