water pump earthfault

tom1ie

hi all,

my RCD tripped this morning and I've isolated the fault to a single circuit that has the shower water pump off it.

The RCD is fine unless I flick the MCB up that has the pump on it. I flicked down the MCBs on all the socket circuits so I could isolate the fault to one circuit- the MCB is not tripping so I imagine its not a short circuit, its an earth fault as RCD is tripping?

Its a 3 bar monsoon pump that we've had for about 5 years.

Does anyone know if these pumps can be fixed or is it goosed?

thanks for any help

10-10-20

Is there any sign of water on or around the pump?

Try these lads:

https://www.domesticpumps.ie/emergency-pump-repair/

I'm about to go into them with a 20 year old Monsoon pump today!

tom1ie

https://www.boards.ie/discussion/comment/121258177#Comment_121258177

I dont see anything yet but its in an awkward space in the hot press up on a shelf and i havent disconnected it from the fused spur to confirm its definitely that.

Thanks for the heads up with those guys ill give them a go.

kirk.

Is there any isolator or switch beside pump ?

And repeat the same procedure using that switch not the mcb

Also is RCD tripping when power is applied even when pump is not in use (pumping)

tom1ie

https://www.boards.ie/discussion/comment/121258209#Comment_121258209

yeah even when the pump is not pumping the RCD trips if i have that circuits MCB switched on.

kirk.

https://www.boards.ie/discussion/comment/121258236#Comment_121258236

Well turn on MCB and repeat your original test using the switch pump

That just gives better confirmation without being able to electrically test pump

Seems odd just a pump on a circuit

If the pump doesn't switch on momentarily when you apply power then it sounds like it may not be pump windings possibly

Probably follow 101020s suggestion orpossibly faulty metal capacitor or some component

kirk.

And make sure you're immersion isn't switched on 😁