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Air Purifier Electrical Fault.

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I was given a faulty VAX air purifier to repair today. The fan would not turn. The motor would not work. The control buttons did operate and a confirmatory bleep could be heard when they were pressed. Also dim L.E.D.s lit up confirming that the control panel seemed to be o.k. The motor fan did rotate quite freely by hand. No damage to P.C.B. P.C.B. fuse o.k. The appliance is rated at 75 Watts. The 1.5 micro Farad motor starting capacitor was reading very low capacitance. In the pico Farad region. After replacement of the bad capacitor the motor still did not start.


What did I have to do to get the motor working, and why?


https://www.vax.co.uk/ap01-air-purifier

Z.
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    Thanks for that Mike. The problem was, as far as I can gather, that the capacitor went open circuit and the motor stalled. Perhaps it was turned on and left on but it didn't rotate the fan blades. As the unit is very quiet on the low speed the fault may not have been noticed. Then the motor overheated and the thermal fuse opened as well to reduce the chance of fire and further damage. I replaced the thermal fuse and the capacitor and oiled the motor bearings with thin synthetic oil, now the unit works well. Please see my other post about servicing a fan motor as it shows the thermal fuse renewal.


    Fan head motor servicing....https://www.youtube.com/watch?v=KtDz_GPIi0s


    The capacitor is the black box with two wires as seen in the video.


    Bye,


    Z.
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  • 0
    Thanks for that Mike. The problem was, as far as I can gather, that the capacitor went open circuit and the motor stalled. Perhaps it was turned on and left on but it didn't rotate the fan blades. As the unit is very quiet on the low speed the fault may not have been noticed. Then the motor overheated and the thermal fuse opened as well to reduce the chance of fire and further damage. I replaced the thermal fuse and the capacitor and oiled the motor bearings with thin synthetic oil, now the unit works well. Please see my other post about servicing a fan motor as it shows the thermal fuse renewal.


    Fan head motor servicing....https://www.youtube.com/watch?v=KtDz_GPIi0s


    The capacitor is the black box with two wires as seen in the video.


    Bye,


    Z.
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