Extractor fan Greenwood Airvac NTX100b

[damafor]

Hi, please can anyone tell me why after installing the NTX100b fan, it continusly runs and won't switch itself off. I've replaced it with model no.G510 which was on 3 wires, the new model only requires 2, only requiring wires L and N. The old model was controlled by the light switch.

Any information/help would be greatly appreciated.

Many thanks

Dave

 

[Taylortwocities]

I'm not familiar with the Greenwood range but it sounds to me like the old fan was a timer model and the new one is not.

Probably you have connected the fan up to neutral and the permanent live - you should connect the fan to neutral and the switched live - this should only become live when the light is on.

PS, you should fit a timer fan if the room does not have an opening window.

 

[bernardgreen]

The old model was controlled by the light switch.

That is the clue.

On the three wire (plus earth) to the old fan had permanent live and switched live that came on with the lamp. The switched live controlled the fan. When the lamp is turned off the switched live is no longer live and the fan can stop ( or if with a timer fitted can run on the permanent live until the timer runs out ).


Taylor has beaten me to it.

 

[damafor]

Thanks guys, will try that, but might have to get a different fan as no window.

 

[damafor]

At moment I got blue to Netural, red to L1 and there is a yellow wire which is not connected, with this wiring no power at all, when put the red to L i get permanent power still not using yelow wire, does this make a fault with the product, or am I still doing something wrong?

Thanks

Dave

 

[Taylortwocities]

Try blue to N and yellow to L1. Sleeve the red - its probably permanently live.

Why idnt you buy the same model as you had before. There's a few on eBay, I notice...

 

[hemulin]

I have just had the same problem......and by disconnecting the red and wiring the blue to N and the yellow to L1......it worked!
Thanks for your help.