Fujisu air conditioner fan motor

If the capacitor is a start cap (usually low power motor just has a run capacitor), the the extra wires might be some sort of sensor to switch the start capacitor out?

Speed of induction motor on 50hz =(6000/no of poles) - slip Slip can get quite significant as the no of poles rise and the load will change with fan speed too.

You might have 10, 12 and 14 poles based on those speeds?

Or possibly thermistor overload protection? Don't know current types but

Can you open it to see what's going on?

NT

You could conduct a few experiments with the motor if you have an ammeter. ie Test out wires for continuity & make some random connections & see what happens keeping a check on the current, (ie it doesn't exceed stated max.) Problem is, at least two windings are need to start the motor. Sometimes one is disconnected after startup, sometimes not. Probably not in this case. The capacitor is a clue, it provides phase shift,(single phase motors are not self starting) so the winding connected in series with this will be the "start winding" and will be used regardless of speed setting.

As it's 42W my guess is it is a run capacitor but looking at the wiring the colours match the AUY24LUAR circuit which seems to have white as a common and then red purple and blue being switched speeds. The black is in series with the capacitor which is connected to the white so that would be the out of phase winding to kick it in the right direction.

The thing is why have an inverter model without taking advantage of synthesising 3 phases for a true rotating field?

When I get back to it I'll connect neutral to the white and live to the red and see if that works.

Doesn't make a lot of sense to have that many poles does it?

AJH

cheaper

Well it works so I've just got to find a way of converting the refrigerant connections to BSP and that leads to my next question in another thread.

AJH