Air purifiers through indoor air adsorption, filtration, catalytic decomposition, and release of negative ions and other means, filter dust, eliminate odors and harmful gases, kill bacteria, and mold, to improve indoor air quality. However, air purifiers can also fail, such as the indicator light, the fan does not turn; indicator light does not light, the fan does not turn; generator poles between the fire; negative ion output concentration is low. So, how to repair air purifier failure?
How to repair air purifier failure?
1. The high-pressure indicator light does not light up and the fan does not turn.
The high-voltage indicator light does not light up, generally, the power supply fuse or high-voltage generator circuit is faulty. It should be checked in the following order:
Check whether the fuse is blown, if it is broken, the cause should be found out before replacement.
Check whether the step-up transformer coil is burned out, use a multimeter to measure its resistance, if the coil is open or short-circuited, it should be replaced with the same type of transformer.
Check whether the rectifier tube and capacitor of the voltage-doubling rectifier circuit are damaged and whether the oscillator stops oscillating. Use a multimeter to detect the relevant components one by one, replace the burnt components, can troubleshoot.
2. High-voltage indicator light, but the fan does not turn.
The high-voltage indicator is on, indicating that the power supply high-voltage circuit is normal, the fan may be faulty. First of all, check whether foreign objects stick to the fan blade if bearings are seriously worn, and if there is no abnormality, and then check whether the motor leads are disconnected and whether the winding is damaged. Available multimeter measurement, if the winding is open or short circuit, should be replaced with the same specification fan motor.
3. Negative ion generator ignition between the poles.
Negative ion generator pole fire, there may be too much humidity in the ambient air, may also be positive, negative pole piece bending deformation caused by. First, use tweezers to correct the pole piece, if it still fires, the air purifier can be moved to a dry air place to try, generally troubleshooting.
4. Negative ion output concentration is low.
There may be too much dust and dirt on the filter and electrode, positive and negative pole piece bending deformation; there may also be a high-voltage generator circuit failure caused by high pressure is too low. First, remove the dirt on the screen and electrode, correct the positive and negative pole piece, if ineffective, and then check the high-voltage circuit. Use a multimeter to check the step-up transformer, rectifier, capacitors, and so on.
When cleaning the dust on the fan motor and electrode, be sure to cut off the power supply, unplug, short the high-voltage electrode discharge, brush the dust with long bristles; use tweezers to clip the alcohol cotton ball to clean the electrode seat; do not casually disassemble the high-voltage electrode of the negative ion generator.