Service manual
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11.3.4 Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes, the unit stops
and LED displays failure information and can’t returns to normal operation automatically.
11.3.5 The current protection of the compressor
If compressor turns off for continuously 4 times due to current protection in 5 minutes from Compressor On,
the unit stops and LED displays failure information and can’t returns to normal operation automatically.
11.4 Fan-only mode
Fan speed is high/mid/low/ Auto
11.5 Cooling mode
The 4-way valve is closed at cooling mode.
The action of the compressor and the outdoor fan:(T=indoor temperature)