Danfoss TP9000 trouble shooting

[Midwest]

Thought I would update, for historical purposes.

Eventually after much ado, Danfoss decided to reply to my emails. They suggested the on/off cycling of the boiler outside normal switching cycles, was down to 'induced voltage on the sensor cables, this is common on new installations where the TP9000 is located next plugs sockets or mains cables'.

Had site agent & plumber around today to show us 'how to use the programmer!' (I was at work). That was before they saw the boiler cycling on & off ever 5 mins, when it should of been sat silent. Plumber on my side, by the way.

So by the process of elimination (programmer, stat have been replaced), the zone valve head was replaced, and...…………..boiler still cycles on/off.

Not that I'm smug enough to say I could identify the fault (my money is on a connection fault, or something to do with boiler, frost stat), I've paid my dosh and they can fix it.

I'll update after the boiler is replaced.

 

[Midwest]

Another historical update. As you can see by the time, woken up at 4 this morning, well I woke myself up by snoring to hear the boiler firing up.

Quick & very quiet investigation, I found the upstairs heating zone was working. The zone valve was open, pipes slightly warm (& rads). By-pass seems to have opened as well. Downstairs zone valve closed, TP9000 set to frost stat mode (temp in garage where boiler is, well above 5').

The upstairs is controlled by TP5000, no idea why its calling for heat. Didn't want to turn on the bedroom light, and wake up her indoors

Getting very tempted to my screwdriver out, and have a butchers myself. This Danfoss stuff, does seem overly complicated by the number of user options.

Emailed builders twice in last few weeks. No response as yet.

Anyway, must get ready for work, only got 3 hours to do so.

 

[Midwest]

New update.

The builders/plumbers/electricians agreed something was amiss, and decided to replace the controls.

Yesterday an electrician replaced the Danfoss programmer and sensor with a Honeywell ST9400 programmer, and T6360 wall stat, presumably they considered the induced voltages to the sensor suggested by Danfoss.

Today I verified the function of the controls, and found that with the programmer set to off, the heating still cycled by turning the stat up and down. I think the hot water is functioning as it should.

I've reached the point, where my curiosity got the better of me, and removed the cover off the stat. With programmer set to off, I had voltage on the live supply. I also noted the neutral (& earth) of the 3c tw&e was not connected.

Intrigued I removed the front of the programmer. It had various connections to L&N, but a link from L to terminal 1 (HW Off), and one wire connected to terminal 3 (HW On).

I'm now suspecting the whole set ups is incorrectly wired up, please tell me if I'm wrong, and replace both the stat & programmer as is.
I'll be contacting them Monday.

I'm very tempted to sort the thing out myself, but don't see why I should.

 

[Midwest]

Of course all the developers and trades have knocked off for Xmas

 

[Midwest]

Bit bored, so thought I would update, for historical purposes.

Still no further forward. Electrician visited this week, whilst I was at work. Wife rang me, so me & electrician could have a telephone conference type call.

So I explained my displeasure on having to turn on my heating via the new Honeywell thermostat. He said, well that was because the old stat was a sensor for the old programmer. Fair enough I said, but why can't we re-connect things, so it will operate via programmer?

No can do said sparks, you'll have to use the stat. I said I've not paid hundreds of thousands of pounds, to operate my heating that way.

Any case I said, why haven't you connected up the stat properly, i.e. using the neutral and park the cpc inside stat? Thats how we connect them up, two wires, don't need neutral, said sparks. I said digital ones don't need neutral, but this isn't a digital one, suggest you read the manufacturers instructions; and thats why the stats temperature sensing is not functioning correctly. Whose told you to do that. My boss said the sparks.

Well I said, lets say no more, but get your boss to ring me, so we can have a chat. Off went sparks. Later that day I had an email from the developer;
Further to your recent phone call to chase up on the plumbers visit. I have spoken with **** and following their previous visit, they have advised that they will not be attending to the heating programmers again due to the wiring being touched by yourself. Unfortunately this negates the warranty.
With kind regards.

So I emailed back saying,
Please note I have not touched the wiring . Please can you advise/explain how you have come to this conclusion?

Day later;
I am sorry, the Plumber are now claiming the electricians have touched the wiring not you.
Please leave this with me. Apologies for any inconvenience.

6 months and counting, and my gas bill has just gone up!

 

[Toneyz]

Regarding the roomstat (downstairs)this needs a neutral to work efficiently.
The earth/CPC should be parked in the earth terminal or k.o box the stat could be mounted on. You should have a cable out of C.H. ON this is the timed output that feeds the stat the stat then opens the valve.
Do you know what rads are on each zone as it is not always upstairs and downstairs the 1st-floor landing may well be on the ground floor heating zone.
Is this a two story house?
what have you got upstairs and what is its location.
What I would do is strip the system down bell out each cable and make sure that there are no shorts in the cable where two cores are shorted together and start again.

 

[Midwest]

Anthony thanks for replying, but do read the thread.

 

[Toneyz]

Anthony thanks for replying, but do read the thread.

Ok, all the best with it hope you get it sorted.

 

[Ffoeguk]

what boiler have you installed? sounds like the pre heat has been left on in the boiler settings to me, get a look in the manual for the boiler.Having this on will give these symptoms!

 

[Midwest]

I never installed it! Wish people would read the whole thread

Can’t think of the make, but it’s a system boiler.

 

[Toneyz]

We know you have not done the installation people are trying to give you possible causes.

 

[Ffoeguk]

I never installed it! Wish people would read the whole thread

Can’t think of the make, but it’s a system boiler.

I meant "have you installed" in your propety
Crack on clever clogs, some people are not worth helping!

As well as being an electrician i also have my CCN1 Gas qualification and have ran jobs for social housing installing boilers, up to 15 a week. I know a bit about them and the faults that can be found with them.

 

[Midwest]

I know the problem; its not been wired up correctly. Should be done as an S-Plan +, but as per my previous posts, I'm not touching it, 'cos they'll void the warranty.

Just wish they would get on with it & sort it. Pain in the arse it is.

 

[Midwest]

Sorry chaps thanks for the replies.

 

[Midwest]

Having had some notifications on my thread, I’ve thought I’d update, for historical purposes again. Plus can’t sleep cos of a stinking cold.

Way back in April, they eventually sent round one of their sparks/plumbers who knew what he was doing, and reconnected the programmer and stat, in the conventional way. All works as it should now.

Just feel sorry for all of my neighbours, who probably have their systems installed incorrectly.