China Honway Machinery HWG550, Инструкция оператора

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Interior of the inverter is too hot: :( The inverter may be hot in the
following condition)

Environment temperature is too high;

When the fans are cool and steps work;

Ventilation condition of the inverter is poor;

When the frequency of the carrier wave is too high;
How to solve above problems:

Change the fans;

Improve the condition of ventilation and heat dissipation around the
inverter;
When the power LED stops working or the light of power winking, but on the
screen, there shows power. It says that poor contact occurs.
When hunting of speed control occurs or the speed governor does not work,
you should change another governor, because the governor may be damaged.
Power LED and working light works well and the display screen is also all right
and but the machine don’t work, there may be something wrong with the
electric motor, perhaps poor contact of connecting line occurs, so please check
the connecting lines carefully.