Maintenance of household modular contactors during operation

(1) In normal use, check whether the load current is within the normal range.

(2) Observe whether the relevant indicator lights are consistent with the circuit normal indicator lights.

(3) Whether the sound is normal during operation, and whether there is noise caused by poor contact.

(4) Whether the contact points are burnt.

(5) Whether there is a state of poor operation of the contactor in the surrounding environment, such as humidity, excessive dust, excessive vibration, etc.