Non priority shower unit issue

[liam regan]

Hi all, I have 2 showers running off a Garo Non priority unit. This causes one shower to not activate if the other is on.

1 of the showers is working fine. The other turns on for a few seconds & then loses power completely. I'm abroad so I've had an electrician look at it for me & he's saying the wire to it might be faulty. Am I right in saying this isn't a possibility from looking at the wiring diagram?

He's swapped connection from shower 1 to shower 2 on the contactors however the fault stays with the original shower.

 

[marconi]

I think the fault may also be with the 'original shower' or - inadequate water flow/pressure to it or flow from it, either causing the shower to trip on overheat.

 

[rapparee]

I've had to deal with this before.


It turned out to be the contactor in the unit in the attic. That took a long time to diagnose considering I wasn't told that there were two showers from the one supply.


But considering your electrician is there, you have to trust his analysis.

 

[Spoon]

Ok. Silly question time.
How does that circuit work?
It looks like you have the 40A feed for the shower going through the coils of K3 & K4 before it goes to the shower.
The 6A feed goes through the NC of K3 & K4 which energise K1 & K2
I'm presuming K1-K4 are contactors.

 

[marconi]

K3 and K4 sense the flow of current to each shower. When the current through their coil is greater than 11-12A their corresponding contacts open. Since K3's NC contacts are in series with contactor coil K2 and K4's NC contacts are in series with contactor K1......

I leave you to complete the explanation.

 

[Spoon]

K3 and K4 sense the flow of current to each shower. When the current through their coil is greater than 11-12A their corresponding contacts open. Since K3's NC contacts are in series with contactor coil K2 and K4's NC contacts are in series with contactor K1......

I leave you to complete the explanation.

Thanks @marconi, that makes more sense.