The motor control system by the switch, a small transformer, fuse, main contactors, relays, temperature, pressure sensing device, etc., is relatively complicated. Often need the help of a variety of fault, control schematic analysis investigation.

    Usually pay attention to maintain control box outside the clean and dry, no water, oil, on a regular basis with a small sweep fan blowing components and terminal box clean, the rafts dust, or brush clean with a brush dipped in cleaning appliances, so as not to affect the contactors, relays or insulation. The control box has a the bake tide resistance, generally do not feel free to turn off the heating switch. Should also keep the cabinet reliable grounding to prevent electric shock.

    To regularly check the wiring inside the box and screw fastening, wiring and screws to prevent loosening. View switches, contactors, relays and other components for damage or ablation phenomenon burnt, the components work status and from the stop, chain function is normal. To maintain contact with dynamic and static contact pull, good contact, avoid contact contact caused by poor motor phase is missing and burn. If the contact surface is good, only black, available coarse rub, do not easily polished off the surface of the heat-resistant alloy layer, otherwise it will shorten the contact life; contact surface ablation is more serious, "0" sand available The paper will be to grind. Dynamic and static contact to keep their line contact or surface contact instead of point contact. Contact situation is good or bad move, static contact placed between sheets of paper to check the suction timely folder does not bear such contacts or springs need to be adjusted or new ones). This need to pay attention to light when, due to poor contact will have a greater contact resistance (current), means that the load increases, resulting in the tripping of the overload relay, weight will cause the motor missing running and burn . A wheel is spring card control inside the main contactor resistance caused by missing running within 10 months burn oil separator motor.

    Replace the relay contacts need to pay attention to the solenoid operating voltage, so as not to burn for the wrong coil. Generally 24V, 110V and 220V, time relay, in addition to pay attention to the coil voltage requirements, but also figure out the time relay time adjustment (hours, minutes, seconds) and range.

    A star - triangle (Y-△) start (switching delay of about 5 seconds) motor is to examine its conversion start is normal. Typically, the manufacturer of the motor starting period (number of starts per minute) there are strict requirements, will start on the control box warning labels to remind users to prevent the motor from damage due to frequent start, but also to prevent the start-up control box of some of the electrical components (such as starting reactor) fever burned. Therefore, the start and stop frequently or current motor control system should be shortened inspection and maintenance cycles. Such as: grams Order, windlass, winch, the host auxiliary blower, the main air compressor and boiler pump and so need to pay close attention to regularly check the thermal overload relay protection function (toggle next to the red mark color system), set the action value should not exceed the rated current of the motor nameplate to ensure that can play the role overload.