robred100 Posted December 16, 2012 Share Posted December 16, 2012 I have a Trumatic 6002 c heater/boiler in my Swift Bel Air. With the control set to 20 degrees it fires up ok and starts to blow warm air from the vents.but either "red lights" or misfires after 5 to 10 minutes. If I turn the temp down to about 17 degrees and restart, it will run ok until it reaches room temp of about 17 degrees and then a solenoid clicks and cuts the burner off and leaves the circulating fan pumping out the warm air until that eventually shuts down. If I then turn the control up to 20 degrees or higher,I hear the burner fan start and the gas solenoid open and then the burner ignites. it runs for varying amounts of time but soon either "redlights" and shuts down or goes into a cycle of solenoid opennig/ burner firing/solenoid shutting/ burner shutting down. Anybody out there got any ideas? A point in the right direction would be much appreciated! :-S Link to comment Share on other sites More sharing options...
BKen1 Posted December 16, 2012 Share Posted December 16, 2012 I think the first thing to check would be the gas bottle is it nearly empty if so could be loosing pressure if the heater runs for while. Brian Link to comment Share on other sites More sharing options...
Rayjsj Posted December 16, 2012 Share Posted December 16, 2012 I think there are other threads on this subject both on here and 'other' forums. use the search facility. No experience of this heater/boiler, mines a Combi 4e. The Truma website is fairly good with lists of engineers both in fixed worshops and one's that are 'Warranty covered' to fix the heater at your home. For Spares breakdown/Diagrams try : http://www.leisureshopdirect.com/caravan/home/caravan-spares.aspx#hashJumptohereSchematics Good luck Ray Link to comment Share on other sites More sharing options...
robred100 Posted December 16, 2012 Author Share Posted December 16, 2012 Just put a new bottle on and no different. Sorry about the duplication, tried to correct a spelling mistake. not sure how to delete the duplication. Link to comment Share on other sites More sharing options...
rolandrat Posted December 16, 2012 Share Posted December 16, 2012 Are you running it with hook up or just on your leisure battery? If just on your leisure battery then you need to know if it is charged up or not as a low battery will cause the symptoms you mention. Link to comment Share on other sites More sharing options...
robred100 Posted December 16, 2012 Author Share Posted December 16, 2012 I have 2 leisure batteries and a 60 watt solar panel, so the they are always delivering 12 volts plus. When I checked the voltage in to the pcb it was 12.9 volts so I hope I have eliminated that line of enquiry, but thanks for the suggestion. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted December 16, 2012 Share Posted December 16, 2012 robred100 - 2012-12-16 12:53 PM Just put a new bottle on and no different. Sorry about the duplication, tried to correct a spelling mistake. not sure how to delete the duplication. Presumably the heater behaved itself until recently? Did the present problem suddenly become evident, or were there any symptoms where the heater occasionally went into 'fault mode'? I assume you have Truma's operating instructions for a C-6002. These include advice on a situation where the "Heating switches to Fault mode after an extended period", suggesting that this may be caused by hot-air outlets being blocked, the gas regulator icing up, or the butane content in the gas-bottle being too high. I'd add to this the possibility that the regulator itself may be failing. Your mention of "a cycle of solenoid opening/ burner firing/solenoid shutting/ burner shutting down" sounds like something I experienced years ago with a Truma C-3402 heater when the outlet-valve on a gas-bottle became faulty and prevented an adequate supply of gas from reaching the heater. A partially blocked regulator would do the same. If you are using butane, I suggest you switch to propane - though I'm not overly optimistic that would fix the fault you've described. Try turning on all the hob-burners (plus the oven if your motorhome has one). If all the burners will work simultaneously at full blast, then it's a reasonable bet that the regulator is not the culprit. Although inadequate leisure-battery voltage will put a Truma C-series heater into fault mode, the red monitor light on the heater's control-panel should flash to indicate that low voltage is the cause. I'm concerned that your heater "misfires" as this may be an indication that the gas-exhaust/air-intake is not properly attached to the heater or is damaged. As you own a Swift Bel Air your Truma heater must be over 10 years old, so the problem may be age related. Link to comment Share on other sites More sharing options...
Dave Newell Posted December 16, 2012 Share Posted December 16, 2012 Instead of us guessing at possible causes and solutions your best bet is to phone Truma technical tomorrow morning, they will give you chapter and verse on the most likely causes of your fault. I'm Truma trained and a warranty workshop for them but I often use their tech guys for advice and they've never been wrong. D. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted December 17, 2012 Share Posted December 17, 2012 TRUMA UK Ltd Park Lane, Dove Valley Park Foston, Derbyshire, DE65 5BG Truma Service/Technical Tel: 01283 586020 (Lines open 8.30am - 5.00pm Mon - Thur, 8.30am - 1.30pm Fri) Email: technical@trumauk.com Link to comment Share on other sites More sharing options...
robred100 Posted December 18, 2012 Author Share Posted December 18, 2012 Many thanks to all for your help. It has given me food for thought. I am going to take it to my local dealers to get the burner serviced, but i would like to have an idea what the problem might be. The burner misfire happened occasionally a few months ago but has now got worse. I have changed the regulator and the gas bottle, and the stove burners work well. I Always keep all the outlet vents open. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted December 19, 2012 Share Posted December 19, 2012 You are probably aware of this, but I'll say it anyway - there is no real way to "service" a Truma C-Series heater. To inspect the burner of a C-Series heater will require the appliance to be removed from your motorhome and then to be dismantled. When the heater is apart there may be something obviously wrong with it that can be corrected, but otherwise your local motorhome dealership may not be in a position to identify the cause of the fault other than by educated guesswork. Truma(UK) has the capability to bench-test C-Series heaters, but your motorhome dealer is unlikely to have such facilities. Can I ask if you followed Dave Newell's suggestion to contact Truma(UK) and, if so, what advice you were given? Link to comment Share on other sites More sharing options...
robred100 Posted December 26, 2012 Author Share Posted December 26, 2012 I Haven't contacted Truma yet, but I will be doing straight after the Christmas break. I shall probably remove the unit myself, ( I am a competent engineer) and send it off to Truma. I had a prelimenary peek at what is involved, and the only thing I can't see at the moment is how the exhaust pipe is secured to the unit as it is right at the back. I undid the worm drive clip on the external trunking but couldn't see the fixing for the actual exhaust pipe. ?? Again thanks to everybody for their advice and concern, and a Happy New year to you all Link to comment Share on other sites More sharing options...
Dave Newell Posted December 26, 2012 Share Posted December 26, 2012 robred100 - 2012-12-26 12:37 PM I Haven't contacted Truma yet, but I will be doing straight after the Christmas break. I shall probably remove the unit myself, ( I am a competent engineer) and send it off to Truma. I had a prelimenary peek at what is involved, and the only thing I can't see at the moment is how the exhaust pipe is secured to the unit as it is right at the back. I undid the worm drive clip on the external trunking but couldn't see the fixing for the actual exhaust pipe. ?? Again thanks to everybody for their advice and concern, and a Happy New year to you all To be honest you'd do better tking the whole motorhome to Truma in case its caused by something other than a fault in the main unit. There are plenty of Truma accredited workshops around the country who should be able to diagnose it and fix it for you. I'm not doubting your competence as an engineer but if you're someone who has not removed a C series heater before I'd respectfully suggest you leave it to someone who has because they're often installed badly and a proper pita to deal with. Truma's website should lead you to aa workshop in your area that can deal with it. D. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted December 26, 2012 Share Posted December 26, 2012 robred100 - 2012-12-26 12:37 PM I Haven't contacted Truma yet, but I will be doing straight after the Christmas break. I shall probably remove the unit myself, ( I am a competent engineer) and send it off to Truma. I had a prelimenary peek at what is involved, and the only thing I can't see at the moment is how the exhaust pipe is secured to the unit as it is right at the back. I undid the worm drive clip on the external trunking but couldn't see the fixing for the actual exhaust pipe. ?? Again thanks to everybody for their advice and concern, and a Happy New year to you all Downloadable Installation/Operating instructions for Truma C-series appliances can be found here http://dealer.truma.com/_anweisungen/Truma-Katalog/gb/trumatic_c/trumatic_c.html The way the heater's intake/exhaust ducting is attached to the unit is described in the Installation instructions, together with explanatory drawings. I'm pretty sure the instructions appropriate to your heater are these: http://dealer.truma.com/_anweisungen/Truma-Katalog/pdf_verzeichnis/30_000/34000_94600.pdf The ducting attaches to the heater in much the same manner as it attaches to the outer wall cowl. In both cases an O-ring is used to provide a seal for the inner (exhaust) duct, and a new O-ring should be fitted following any disassembly. I echo Dave's advice about taking the motorhome to a service centre with experience of these appliances, rather than remove the heater yourself. I don't know where Swift will have installed the C-6002 in your Bel-Air but, if it's going to be a beggar to work on, or remove, because of difficult access, there's certainly nothing to stop you removing locker doors, or a wardrobe floor to make things easier for the technician and minimise labour charges. Truma's website has a search facility http://www.truma.com/uk/en/home/dealer-search.php and, where a C-Series heater is involved, it would probably be best to stick to motorhome specialists rather than caravan dealerships. Link to comment Share on other sites More sharing options...
robred100 Posted March 2, 2013 Author Share Posted March 2, 2013 Final Update on this saga After abortive attempts to contact Truma, (no reply, and no response to messages left), and no interest from two Truma trained engineers who will remain nameless. I was put in contact with Kernow Mobile Caravan Services. ( Dickie Lawless) Tel 07877 352 288. Came out and soon diagnosed the problem to the burner fan running too slowly and not providing sufficient air to the burner at the higher temperature settings, thus gas was not burned efficiently and the sensors detected this and shut the system down or it misfired. The unit was stripped, cleaned and a new fan fitted and is now working perfectly. I really must say Mr. Lawless was so helpful, and very mindful of my desire not to throw money at the problem unnecessarily. He did a good job, was very fair about his charges and he taught me a lot, so I have no hesitation in recommending him to anyone in the Cornwall area. A GOOD HONEST TRADESMAN !! my motorhome is now officially "toasty" Link to comment Share on other sites More sharing options...
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