1) After power cut, clean the dust inside and outside the electric cabinet; then, both inlet
and outlet air filters shall be checked, and replaced without delay if there is a fault;
2) Components, wires and ends of the electric cabinet shall be checked for looseness or
abnormal heating. Any fault, if any, must be handled without delay;
3) Any components that are melted by electric shock with extreme high temperature of the
coil, as well as ineffective action, oxidized protection device mechanism and worn off
operating mechanism shall be replaced without delay;
4) All kinds of sensors and meters shall be checked whether are installed and fixed for
looseness. Any fault, if any, must be handled without delay;
5) If there are abnormal hums in the operation of contactors, relays, solenoid valves and
other induction components under normal voltage, relevant devices should be replaced
without delay.
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