91 Troubleshooting
3.3 Measure the current of the compressor's U,V,W terminal respectively, which should be more or less
the same, by e.g. current flow table clamp.They should be 4A at the frequency of 35Hz.
4 P6 appears after the compressor turns on with difficulties
4.1 Check the module according to step 3 first.
4.2 If the module works, make the machine standby for 4 hours with power supply, which can help
heating the refrigerant and oil adequately.
4.3 Start the fixed frequency compressor only for 3S to 5S.The great startup pressure could wash the
impurity away in the tube.
4.4 If the compressor's frequency climb to 37 Hertz or above in 2S after turning on, then there's
something wrong with the compressor. Check the compressor.
4.5 If the compressor 's current is normal, the malfunction appears on the control board. Please replace
it.
5 The machine is powered on and “0” will appear for few seconds, then quantities of indoor units that
have been connected will appear if the machine is normal.
In normal situation:
LED 1: Flash in 1Hz (slowly flash) when standby
LED 1: On when running
LED 2: Off
Phenomenon A
LED 2 red ON
LED 1 green Flashes 8 times and stops for 1S, then repeat.
Error: Inverter module failure
Phenomenon B
LED 2 red ON
LED 1 green Flashes 9 times and stops for 1S, then repeat.
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