For the “compressor out-of-step error” and “module protection error”,
the former is calculated by the main chip of the module panel and the
latter is detected by the power module itself. They are abnormal
operating phenomenon of the compressor essentially. If there is
uncertainty about either error, analyze both together with similar
method. For inverter air conditioners that are in poor electrical
environment or are old, occasional occurrence of such errors is a
normal protection.
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