Cooker Hood Problem

[Derek Morrison]

Have you tried a bench run with the new motor.

Yes...tried bench run with new motor and new controller.

 

[westward10]

Yes...tried bench run with new motor and new controller.

And does it run.

 

[bigspark17]

Im guessing not :/

 

[Derek Morrison]

Im guessing not :/

....Hence the thread

 

[Wilko]

Hi Derek and Welcome to the Forum !
Can I ask what size was the fuse that blew? Was it replaced and blew again? Sorry, just starter dumb questions. Do the lights still work? Probably it's in a million pieces just now I guess.
Edit - just reread OP so modified q.

 

[westward10]

Delete.

 

[PEG]

Hi,has the motor got speed control,and is this achieved via the controller itself?

 

[Derek Morrison]

Hi Derek and Welcome to the Forum !
Can I ask what size was the fuse that blew? Was it replaced and blew again? Sorry, just starter dumb questions. Do the lights still work? Probably it's in a million pieces just now I guess.
Edit - just reread OP so modified q.

Hi - The fuse which blew was a 3A. I said earlier it was a Fused spur but it was a plug and socket so the 3A fuse was in plug. I replaced and this never blew again. The lights work via the controller. The controller also provides speed control. 3 output speeds. The windings of the motor seem intact as I have measured between what I think to be the windings. The readings pretty much double then treble.Capacitor is healthy(tested). Tried testing separately motor and controller. When switching each output speed, a voltage 240Vac could be seen at each output wire of controller (red, black, blue to neutral). When connecting brown of motor to mains L, which is where I believe it has to be wired to, the other windings (wires from motor, Red, Black, Blue) all seem to have a voltage on them when separate from controller. Would this be backfeeding to the outputs of the controller? If so then the brown wire which I believed to be permanently live may not be the case. I just wired it as it had been before so assumed this to be correct.

 

[Wilko]

Ok, got it
With the fuse now not blowing, it may be the short(ish) circuit has removed itself, possibly by a track somewhere melting and leaving on open circuit? All of that stuff is likely in the controller and speed switch and that's now new, I think. That leaves the motor as a suspect perhaps?
Edit : another dumb one, sorry, have you confirmed the fuse in the spur still intact?

 

[Derek Morrison]

Hi Wilko
The controller and motor are both new now. The fuse is in a plug which plugs into a socket in the roof space directly above cooker hood, which has not blown. At present its in bits where I can bench test. Just doesnt work. The only thing which works via the controller is the lights. When I push button for lights, that works. When I push button for speed 1 - controller light latches on, speed 2 - same, speed 3 same.....just motor no turning. Wiring is easy, colour to colour apart from purple which goes to controller is the main live. Capcitor is ok. There doesn't seem to be a micro. The windings of the motor still seem intact. Just doesn't want to turn. Doesn't even make a sound.