Electrical problem with Grundfos macerator

jazzguitar · Mar 4, 2022

I have a grundfos sololift 2 wc1 macerator that isn't working. It's about 3 years old. When the toilet flushes the bowl just fills up but the motor does not kick in. There is power going to the unit, The macerator motor/pump turns freely. I took the motor apart in the hope that there may be debris, but nothing preventative(Just hair wrapped around the spindle). The small trip switches are in the correct position. There is power coming from the large capacitor and from what i assume is the pressure switch

Any advice on getting it working would be most welcome.

Thank you

brianmoooore · Mar 4, 2022

That does not look good at all! Far too busy in there, and putting a lot of strain on the FCU.
Can't see any sign of a flexible there? The connection to Nout looks like another solid cored cable.

jazzguitar · Mar 4, 2022

brianmoooore said:
That does not look good at all! Far too busy in there, and putting a lot of strain on the FCU.
Can't see any sign of a flexible there? The connection to Nout looks like another solid cored cable.

what would you suggest i do? There are no flexibles. all ins and out are the same. Grey insulation stiff wires. 4 sets in total. 3 in and one out.

brianmoooore · Mar 5, 2022

It appears to be a flexible at the macerator.

jazzguitar · Mar 5, 2022

brianmoooore said:
It appears to be a flexible at the macerator.

yes. There is this at the other side of the toilet. Cant get a better picture that that. the solid core wiring is behind tiling.

Lucien Nunes · Mar 5, 2022

With the power off and fused connection unit switch off, test continuity from L, N and E at the load side of the FCU to the corresponding terminals in the macerator. It seems likely the neutral is broken at the dodgy taped-over terminal block connection in the last pic. That should not be there, suggests the cable was too short and they didn't have the right materials to extend it. Looks like 'plumber's wiring.'

jazzguitar · Mar 5, 2022

Lucien Nunes said:
With the power off and fused connection unit switch off, test continuity from L, N and E at the load side of the FCU to the corresponding terminals in the macerator. It seems likely the neutral is broken at the dodgy taped-over terminal block connection in the last pic. That should not be there, suggests the cable was too short and they didn't have the right materials to extend it. Looks like 'plumber's wiring.'

thank you. i will wait til daylight and give that a go

brianmoooore · Mar 5, 2022

I think most on here would agree that you urgently need the services of a competent electrician. That wiring is extremely dangerous, and there are other issues, such as the apparent lack of a local isolator or a remote one that can be locked off.

jazzguitar · Mar 5, 2022

Yes, I will be reaching out to our local electrician. I would like to thank everyone. It looks like there is a break in the neutral line.
Thanks for the help.

Electrical problem with Grundfos macerator

jazzguitar

Attachments

brianmoooore

-

jazzguitar

brianmoooore

-

jazzguitar

Attachments

Lucien Nunes

-

jazzguitar

brianmoooore

-

jazzguitar

Similar threads

OFFICIAL SPONSORS

YOUR Unread Posts