150mm timed extractor fan not working with timer function (photos of wiring)

[Vedb]

Hello all!

I've got a peculiar issue whereby the wiring of an extractor fan seems to be wrong (but working) however it doesn't allow for the timer function to work off the permanent live. Please take a look at the photos to show you the inputs, the wires and also the only configuration which allows the fan to come on with the switch. I'm confused as to why the inputs don't match in the conventional way and also why the permanent live won't keep the fan on after switching off the light. Any advice?

Much appreciated!

 

[Vedb]

 

[binky]

Try swopping the black and brown, some peopleuse brown as permanent live, some people don't .

How do yuo know what is permanent live an switched live?

 

[ProDave]

How do you know which is N?

 

[SPECIAL LOCATION]

Have you actually tested the conductors to confirm which colours have been used for each function?

Or are you just guessing?

 

[Vedb]

That's just it, the usual colouration doesn't apply here and I don't know why it was wired this way. However the only combination which works is the one I've shown on the photo, otherwise the fan doesn't power on.

You can see what they're labeled as on the fan so the assumption is that the wires then correspond to these with black being live, brown timer and grey neutral. I've tried them every which way to see if I can get it right but it always comes back to this.

 

[Vedb]

An update,

It also works in this configuration. Which I've copied from the fan in the bathroom. However it also does not stay on when the light is switched off.

 

[Andy™]

you need to do some actual testing of the cables coming in to see which cable does what. winging it and randomly trying different combinations will either not work, or do damage and not work

 

[Vedb]

Thank you. There's only so many combinations it can be so I wanted to do this without having to call someone in, who also may not be able to do it.

I've not had to test wires before, can someone recommend good gear for testing?