ian81 Posted February 19 Share Posted February 19 We have this unit fitted in 2008 Burstner Aviano. Recently in Spain we started getting the red fault light coming on. Turning it off and trying again after a few minutes generally leads to it starting and working well. Turning on the fan runs for some 20 seconds and then a solenoid clicks. Sometimes there is just a faint smell of gas before the unit shuts down. On other (most) occasions it fires up and works ok. Talking to a Truma dealer in Spain and some other motorhomers elicited the following: 1. Failing pcb 2. Failing spark ignitor / flame detector 3. Blocked gas lines or failing regulator. The hoses were changed 2 years ago when we installed refillable gas bottles: the regulator is a Truma duo comfort Anybody got any useful observations or where to start? The combi is installed under the bed and there appears to be no easy way to service it without removing the bed base. Ian Quote Link to comment Share on other sites More sharing options...
Labby Posted February 19 Share Posted February 19 If it is any help, it could be worth talking to www.arelectronics.co.uk who, I believe, are able to test the PCB on Truma units if required . https://www.arelectronics.co.uk/ Quote Link to comment Share on other sites More sharing options...
onecal Posted February 20 Share Posted February 20 (edited) Hi What fault code is coming up on the unit I think there may have been a recall back then within certain serial numbers , You would have to contact Truma direct as I have not got the information to hand and may not be useful to you if it does not pertain to the exact model or within serial numbers within the recall Regards Edited February 20 by onecal Quote Link to comment Share on other sites More sharing options...
Derek Uzzell Posted February 20 Share Posted February 20 There was a safety recall of certain Combitronic units in (I think 2006) and the C-6002EH heater fitted to my 2005 Hobby motorhome was modified as a consequence. The recall is mentioned in this 2009 MHFacts forum thread https://www.motorhomefacts.com/threads/truma-recall.58146/ and I've copied the recall information below Quote Link to comment Share on other sites More sharing options...
onecal Posted February 23 Share Posted February 23 Hi Ian Let us know how you got on , as it may help others here Regards Quote Link to comment Share on other sites More sharing options...
ian81 Posted February 25 Author Share Posted February 25 Thanks guys for the responses. I emailed arelectronics and got a swift and useful reply that pointed more to gas supply issues. The heater doesn't display a code just a red light! Derek I don't think my unit is included in this. I am questioning the gas supply as the problem has only occurred in colder weather in Spain when I filled up with Spanish LPG which I believe has a higher butane content. Refilling with French LPG -higher propane- and the problem seems to have cleared. Ideally I would like to get the combi serviced but it seems that Burstner make this very difficult to access the heater. More anon -in the meantime thanks to all. Ian Quote Link to comment Share on other sites More sharing options...
Derek Uzzell Posted February 25 Share Posted February 25 The Truma 'safety' recall is a digression. Combitronic heaters that were being fitted to motor homes in 2008 should all have had the revised specification (essentially a different top) and, by then, older heaters affected by the recall SHOULD all have been modified. Even if a Combitronic heater affected by the recall slipped through the net somehow, it should still start up OK - though it might go on fire afterwards.😀 Quote Link to comment Share on other sites More sharing options...
Globebuster1 Posted February 25 Share Posted February 25 I think gas supply would be my first point of call. Whilst I don't have your system - I have the later Combi 6E, if I'm getting low on gas it will throw up all sorts of codes both relating to gas and electrical failure! There is no consistency with these codes either - it has almost become a useful warning that I need to switch bottles. I would add that the hob or fridge is never affected, and would probably continue to run for some time - I guess the 6E being more hungry creates the issue. If you'd not mentioned replacing the hoses, that might have been the cause, both the regulator and hoses are known to gunge up especially as Spanish gas is known to be 'dirty' Quote Link to comment Share on other sites More sharing options...
ian81 Posted February 25 Author Share Posted February 25 2 hours ago, Globebuster1 said: I think gas supply would be my first point of call. Whilst I don't have your system - I have the later Combi 6E, if I'm getting low on gas it will throw up all sorts of codes both relating to gas and electrical failure! There is no consistency with these codes either - it has almost become a useful warning that I need to switch bottles. I would add that the hob or fridge is never affected, and would probably continue to run for some time - I guess the 6E being more hungry creates the issue. If you'd not mentioned replacing the hoses, that might have been the cause, both the regulator and hoses are known to gunge up especially as Spanish gas is known to be 'dirty' Thanks for this. Hob / oven / fridge not affected. Hoses / filters are three years old Quote Link to comment Share on other sites More sharing options...
onecal Posted February 25 Share Posted February 25 Hi When you say it does not display a code ??? It should in the form of a flash code So check out what your flash codes are giving you Example:-a very common fault on the 6E unit is the combustion air fan and is given by five short flashes , two long flashes and one short flash Regards Quote Link to comment Share on other sites More sharing options...
ian81 Posted February 25 Author Share Posted February 25 5 hours ago, onecal said: Hi When you say it does not display a code ??? It should in the form of a flash code So check out what your flash codes are giving you Example:-a very common fault on the 6E unit is the combustion air fan and is given by five short flashes , two long flashes and one short flash Regards no it just a steady re light Quote Link to comment Share on other sites More sharing options...
rayc Posted February 25 Share Posted February 25 56 minutes ago, ian81 said: no it just a steady re light Just to recap there has been no problem with it since you changed the gas from the Spanish bottle? Quote Link to comment Share on other sites More sharing options...
onecal Posted February 25 Share Posted February 25 Hi Ian , It should display a flash code on the board itself . You will have to remove the cover to see the flash codes on the boiler board (Photo attached) Yes you need to re check all your gas supply as your boiler may actually not be getting a sufficient gas supply. Regards Quote Link to comment Share on other sites More sharing options...
Labby Posted February 25 Share Posted February 25 (edited) onecal , I believe that may be a Truma Combi 4E/6E PCB you have shown with flash codes , as the heater/boiler that is/was faulty is a Truma Trumatic C6002 unit do they use the same board ? The Trumatic C6002 has a red and green light on its control switches to indicate a fault. Edited February 25 by Labby 1 Quote Link to comment Share on other sites More sharing options...
ian81 Posted February 25 Author Share Posted February 25 15 minutes ago, rayc said: Just to recap there has been no problem with it since you changed the gas from the Spanish bottle? ...we are using refilleable bottles. Seems to be working fine since we refilled with lpg in France. Quote Link to comment Share on other sites More sharing options...
ian81 Posted February 25 Author Share Posted February 25 1 minute ago, Labby said: One Cal , I believe that may be a Truma Combi 4E/6E PCB you have shown with flash codes , as the heater/boiler that is/was faulty is a Truma Trumatic C6002 unit do they use the same board ? The Trumatic C60002 has a red and green light on its control switches to indicate a fault. I think you are correct the photo shows RJ11 jacks which our Truma doesnt have. Quote Link to comment Share on other sites More sharing options...
onecal Posted February 25 Share Posted February 25 Hi Ian That's good news if you are working again since you refilled in France , You may have answered and found your problem re the Gas you were using Regards Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.