flaktwoods fan speed controller wiring?

[bluesky]

i have been called to see a extractor fan problem, the owner complained that when he turned on the flaktwoods fan speed controller then the fuse would blow and the circuit breaker trip.

I had a look, there are three cables with the fan: red-z, blue-u, black-uz,

i was thinking something wrong with the speed controller first, then i tried to bypass the speed controller, i connect the red, blue and red from fed together, then black with black from fed together, but the fuse still blows,

I had a look, there are three cables: red-z, blue-u, black-uz, i measured the resistance between them: red-blue: indefinite, red-black:indefinite, blue-black:2.0 OM. is this means the fan is gone?

someone had this before?

really appreciate your help!!!

 

[Gage]

what does it smell like. and windings should be balanced + over 1MΩ IR so yes.

 

[bluesky]

thanks Gage,

the fan is outside, so could not smell anything,

so what does the black cable do? am i right to connect it to neutral?

so z and u can be connected to live?

 

[Bobster]

Do you have a model number for the speed controller?

 

[Gage]

thanks Gage,

the fan is outside, so could not smell anything,

so what does the black cable do? am i right to connect it to neutral?

so z and u can be connected to live?

Are you talking about wiring up the motor or the speed controller here?

If the motor just put it in how it came out otherwise I'd prefer to see the connection terminals myself before I tell you how to wire it. Surely the instructions would be inside the termination plate anyway.

(Strange thread because I literally just started reading a very good book about speed controllers for my light reading haha.)

 

[bluesky]

hi Gage, i am trying to bypass the speed controller, connect the power with the fan directly, so i will be sure if the speed controller is wrong or not, but i dont knoe how do the 3 cables work

 

[bluesky]

hi Rob2, i dont have the model number, but it is a one phase, 3 wire one,

 

[Gage]

Capacitor start?

 

[bluesky]

do you mean 2Ω is ok?

 

[Gage]

do you mean 2Ω is ok?

Is the motor capacitor start?

And is that 2Ω IR?

 

[bluesky]

no idea, i just measued resistance between blue and black, it was 2ΩΩ

 

[Gage]

Lol just leave this for someone who knows what they're doing.

 

[Bobster]

How as a arms member do you not know the difference between continuity and IR testing?

i was only asking as some speed controllers use a vsd which will convert single phase to 3phase.

 

[bluesky]

Rob2, before i answer your question, could you let me know what is uz,u and z for? really appreciate if you can help

 

[Gage]

Us are running windings and Zs are starting. (Hopefully). Now answer Robs question