Truma Ultrastore series 3 info. (1 Viewer)

[Trikeman]

Hi All, :help:
a little while ago I asked a question here and several came back with potential 'issues' that could be causing the little problem I have with our Ultrastore when on gas.

I switch it on electric and fine but when switched to gas it runs for a short while (green light on switch/board), clicks then light turns red and switches off. The outside cover is off and the flue is clear.
Some of you mentioned it could be the thermocouple being 'iffy' or requires cleaning. I have a few days off later this week and intend investigating and rectifying this fault.

Has anyone done this job? Does anyone have a 'how to' to strip to check the system.
Obviously I don't want to blow our village into the next century :hardhat: with my tinkering, but being half handy with the spanners is this a 'reasonable' repair or should I call in the specialists. I'm not trying to save the hard earned wanting to do this, I get a lot of satisfaction doing as much as I can - I learn and then get confident in how things work should something go fubar when we are away.

Any advice??????

Regards,

Trikeman.

 

[mitzimad]

i have mine in bits at present it has to come out to be stripped down i spoke to trumas and they said the most likley causes are reversed polarity and suggested wiring it direct from a power source i tried that and no luck so ive taken it out and striped it down
so i can see whats happening
as the second cause they suggested was low gas presure causing the burner not to light fully its a circular burner with ignitor one end it lights and the flame travels round the burner to the flame sensing probe which mine seems to be doing but then it cuts out will be phoning them tomorrow for further info
there is no thermocouple in these flame is reconised by a rectified circuit
striping it down isnt difficult the pcb has to slide up as it plus in at the bottom

 

[Trikeman]

Cheers for that Mitzimad, interested to see how you get on.

It sounds like a similar problem - please let me know how you get on/rectify it and I will endeavour to do the same. On the gas pressure front I think I will check that out first thing and go from there. I have found a schematic (truma parts list) drawing on t'internet which identifies all the bits within the heater to help should I identify what's gone tits-up, but no sort of step by step fault finding list.

If you see a mushroom shaped cloud in the West you could probably guess what's happened......


Regards,

Trikeman.

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[FULL TIMER]

assuming you have checked a good gas supply regulators can play up, I would be inclined to think that this part could be at fault.
59 70000-56200 Flame rectification electrode
Link Removed

They are pretty easy to strip down I had to change the tank on mine as it had a tiny leak that was flooding the area below the burner everything around that area was covered in either rust or white corrosion, removing the tank can be a bit awkward and you need to be very carefull with the hot outlet very easily broken off.

 

[Minxy]

It sounds like it could be the same problem we had with our Truma combi 6E heater/boiler whilst we were in Germany this year!

It did exactly as the OP said, and turned out to be the fan (combustion air intake?) that comes on when it first starts up on gas which wasn't working and needed to be replaced, fortunately it was sorted the following day by a mobile Truma engineer under warranty.

This is the item I'm talking about - no 22 on the diagram (34000-04700 Fan wheel-air), I've circled it in red on the picture:

http://www.thetrumacentre.co.uk/mag...matics/truma-combi-4-4e-6-6e-spare-parts.html

 

[FULL TIMER]

The Ultrastore is a different heater minx it doesn't have those parts.

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[mitzimad]

yes no fan on an ultra store mine is unlikley to be regulator as its now doing the same on a seperate bottle and different regulator
didnt have time to ring trumas today

 

[seanoo]

i had the same problem on mine a few weeks back. i took off the outside cover and you can see a sloping metal plate which obscures your view of the burner. it is held at the bottom by a blob of heatproof mastic. i cut through this and was able to push this plate up with a long screwdriver and then used a standard hacksaw blade to hook the flame sensor probe and bend it out so it was in a hotter part of the flame. no problems since. i spoke to a truma engineer in the uk and he said that the probes can bend gradually with all the heating and cooling and eventually be either too close to the burner or too far away. hope this helps sean

 

[Bill_OR]

@Trikeman - how did you fix this fault? I have the same problem on mine. Started off as an intermittent problem but it's now a hard fault. I'love try @seanoo 's trick when I get home but would appreciate your insight too.
Thanks,
Bill

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[Trikeman]

Hi @Bill_OR

Yep, successfully did it - the usual 'tunnel spider antics'.

Took off outside cover and then the outer plate (couple of screws). You can then see the burner etc, and just by that is a tube that goes in towards the burner - well, a large spider had taken up residence in there and blocked the airway. I poked the said arachnid and his sticky funnel shaped web out with a pencil and followed by a drill bit just pushed through. Gave it a quick blow through, rebuilt and voila, perfect - no probs since either.


Try that before anything major.

Regards,

Trikeman.

 

[Bill_OR]

Great - thanks @Trikeman I'll give it a go as soon as I get home .
Thanks,
Bill

 

[Bill_OR]

@Trikeman - took the plastic cover off this morning and blew hard towards the burner ... and so far so good! Hot water now available again!
That makes life a bit easier for the last few days of our trip.
Thanks,
Bill

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[Trikeman]

Nice one Bill, was there a smell of cremated spiders?????

Glad your up again.

Trikeman.