Bathroom extractors fitted but no timer

[Links2020]

Hi all
We’ve had an unreliable spark in to fit two bathroom extractors with timers, however they come on with the lights but don’t stay on with the timer. Does anyone know if this is a wiring problem?

The model is Vent Axia Silent Fan VASF100T.

Wiring instructions:
https://www.vent-axia.com/sites/default/files/silent_fan_fw.pdf

Many thanks in advance!

 

[flameport]

Various possibilities, but most likely is that they are wired incorrectly, either SL and L are swapped, or it's been done with the wrong cable so it's just SL and N, no permanent L.

 

[Taylortwocities]

Would need to the connections to the fan and at the source end to be certain.