Ground Source Heat Pumps

lovesgshp

Hi.

We are doing okay here, as I do hope you all are as well in these difficult days.

Yes, get a electrician to check all the circuits. It could be just a faulty one

From so many years back, I cannot remember the pump model, but you do need to manually check the 3 way valve as that is the highest failure rate for that alarm, apart from filter cleaning. Keep me updated and will try to help where I can.

Keep healthy.

Best regards from Italy

DeeWestern

Can you say more precisely what the electrician should do, if they've verified the supply to the GSHP?
I've had 2 electricians cancel on me today once they've seen the manual, saying I need a heating engineer or referred me to the manufacturer.
And I've had a general heating engineer refuse the job as it's 'electrics'.
There's no heat pump engineers for miles around, so it will have to be sometime next week when they can attend.
Is there a fuse or similar in the front panel? Can an electrician use a multimeter on the cat5 cable that's going to the front panel to see if power is being supplied? And if so, do we know what they should test?

lovesgshp

Hi.

The electrician would need to check the power supplies inside the pump from your circuit. If the front cover where the fuses are is removed then they can get the readings with a meter, as it really for a electrician to check the power circuits. Have you got the full manual or just the user guide?

DeeWestern

lovesgshp said:

Have you got the full manual or just the user guide? 

The "Assembly, Commissioning and Maintenance Guide".

lovesgshp

Ok, have sent you a PM.

DeeWestern

Got a good electrician to attend today, who diagnosed the issue after an hour - a Moeller miniature circuit breaker had been damaged by a loose connection in the GSHP. He didn't have a direct replacement (now made by Eaton) but rigged somehow the GSHP to work in the meantime, so at least I have hot water and heating after nearly a week. Should be back in a couple of days with the part, £160 all-in.

lovesgshp

That is great news. So pleased everything is working even if only a temporary repair at the moment. The units are fairly straightforward to diagnose, which is why I was confused with the answers from the first 2 electricians.

Now, all we have to do is sort out the gt8/9 problem.

Will you send me the alarm data, so that I can look into it in more detail, plus the readings from gt1 to gt11 in heating mode only, after 10 minutes of operation.

If you need the rego simulator I can email it to you. will not show alarms as is just a program to show what various setting changes can effect operations.

Hope you had a good Easter and now a little more relaxed

DeeWestern

lovesgshp said:

That is great news. So pleased everything is working even if only a temporary repair at the moment. The units are fairly straightforward to diagnose, which is why I was confused with the answers from the first 2 electricians.

Hope you had a good Easter and now a little more relaxed

I am warmer at least, and can have a shower.
Electrician said there was a MCB behind the RCB which showed signs of burning, and a disconnected wire. The MCB still works, but will be replaced in a few days.

The 8/9 alarm triggered almost immediately, when it was getting the hot water up to temp. This means it can't be anything to do with the central heating pump or radiators.
The only possibility I can see (as the 3 way valve is working great, and removing the filter doesn't prevent the alarm) is that the flexible hoses are somehow blocked (which seems strange as they're metal) or the main pump just runs slow for some reason.
I might one day take the hoses off and look inside - I guess I only need a spanner and some PTFE tape? Worried I cause a leak, as it works fine (other than the beeping of course) and I can't see how a metal flexible hose gets a blockage. Or maybe I should get the whole thing serviced, no-one has looked at it for 5 years - is there much maintenance to do?

lovesgshp

Hi.

The metal flexible hose does have a inside liner, which can block or collapse. We have had the odd case. Yes, check it out, but make sure you leave the filters in place. Always check triggering on heating only, as dhw operates at higher heat levels.

As I said earlier, send me some records to look at.

If we get the gt8/9 problem sorted, I will send you detailed instructions to clear what must be 100's of alarms just sitting there.

DeeWestern

Is there a spec or name of the flexible hoses so I can buy replacements? Is this a DIY job or something that needs a plumber to fit?