1, tidy up the impurities of the protective net,

2. Check the softness of the belt. If it is found to be loose, adjust and reset it immediately.

3. Whether the bearing of the motor has abnormal sound, if there is, check whether there is lubricating oil on the motor!

About the maintenance and protection of the motor, we can start from the following aspects:

1, first disconnect the host power supply, check whether the ground is outstanding grounding;

2. Check whether the screws and couplings of each part are fastened.

3. Check whether the insulation resistance of the motor meets the requirements and check the main loop contact according to the instructions. Contact should be replaced immediately if it is severely ablated or severely worn.

The maintenance of the air valve can be considered from the following aspects:

1. Adjust the tightness of the belt, rotate the wind wheel by hand, and investigate whether the rotation is smooth. 2, view and replace the gasket and sealing filler between the joint surface.

3. Clean the inside of motor wind wheel, filter and casing. In order to avoid rust, part of paint should be timely brushed. 4. In order to ensure the sensitivity and stability of the coupling and bearing, lubricating oil should be added to the rotating part.

About the repair and maintenance of the electrical circuit, we should pay attention to the following points:

1, regulating valve mechanical open and close action is sensitive, reliable, open and close view point mark is clearly visible.

2, indicators and voltmeter, ammeter are normal. All parts of the fan work with abnormal sound, three-phase current value is balanced. 3. Check whether the components in the control box of each remote control point are normal.

4. Start and stop successively to check whether the remote control at each point is correct and reliable.

5. Test work for two hours, observe whether the motor bearing temperature and motor temperature rise are within the normal range.