Truma Combi 6 CP problem (1 Viewer)

Jan 31, 2016
1,906
3,392
Alness, Cromarty Firth
Funster No
41,524
MH
Hymer B544 (2012)
Exp
newbie
I swapped my old two dial Truma boiler set up for the newer CP control and fitted the new mother board on the boiler, I'm sure with the old controls the boiler worked on electric. But when I try to select electric only now I can't see the electric symbol on the CP control.
I have looked in the instructions and no matter what I do the electric option is not there.

Is it possible I bought the wrong motherboard for the Truma boiler ? or am I mistaken and the Truma is just gas only ?
 
May 1, 2015
582
432
Caerphilly
Funster No
36,145
MH
Rapido C86 Auto
Exp
Since 2014
I swapped my old two dial Truma boiler set up for the newer CP control and fitted the new mother board on the boiler, I'm sure with the old controls the boiler worked on electric. But when I try to select electric only now I can't see the electric symbol on the CP control.
I have looked in the instructions and no matter what I do the electric option is not there.

Is it possible I bought the wrong motherboard for the Truma boiler ? or am I mistaken and the Truma is just gas only ?
Do your old controls show any electric settings?
 
OP
OP
BusyBuilder
Jan 31, 2016
1,906
3,392
Alness, Cromarty Firth
Funster No
41,524
MH
Hymer B544 (2012)
Exp
newbie
Yes, if I remember correctly but we hardly ever used it. We are away in the morning and was going to put the heating on tonight, 5 or 6C so we can fill up the water tank, and get the van warm as it's about -3c at moment. These are our old controls.

image_212-jpg.20514
 
OP
OP
BusyBuilder
Jan 31, 2016
1,906
3,392
Alness, Cromarty Firth
Funster No
41,524
MH
Hymer B544 (2012)
Exp
newbie
Okay, just checked, the motherboard is Combi 6/03 V05 so should be correct, the Truma sticker on the boiler states Combi 6E, also states 230v 900/1800W

CBE 603 -22110579

so possible I'm doing something wrong with control panel ? but it definitely doesn't show the electric sign only gas bottle.
 
May 1, 2015
582
432
Caerphilly
Funster No
36,145
MH
Rapido C86 Auto
Exp
Since 2014
Bottom control shows its a Combi with electric. The option for electric will only be visible when you go into the energy selection setting - 3rd icon at the top of the cp plus screen. You twist the knob clockwise to move across to this setting then press it and then rotate the knob to cycle through the energy settings. Sorry if I'm just repeating what you've already tried.

I've had a quick look through the range of pcb's and the 6 and 6e pcb's have the same part number. The 4 and 4e pcb's ,which are the same, have a different part number. Can't tell if yours is a 4 or 6 variant.

Patrick

Edit - I was a bit slow typing

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Oct 10, 2018
2,024
1,149
Bracklesham Bay, West Sussex
Funster No
56,646
MH
PVC
Exp
Since 2005
Is there a separate switch that controls the 230v supply to the unit that needs turning on ? I think there is also a 230v fuse in the section below the PCB on the boiler
 
Oct 10, 2018
2,024
1,149
Bracklesham Bay, West Sussex
Funster No
56,646
MH
PVC
Exp
Since 2005
I would not expect the new control panel , which gets its information from the boiler , to show the mains power icon if there is no mains power at the boiler , maybe could it be that it is the 230v reset button on the boiler unit needs pressing ?
 
Last edited:
Aug 19, 2007
564
242
Birmingham
Funster No
120
MH
looking
Exp
2001
Can i ask where did you source the control panel & circuit board from and at what cost please ?

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Oct 10, 2018
2,024
1,149
Bracklesham Bay, West Sussex
Funster No
56,646
MH
PVC
Exp
Since 2005
chippy63 www.caratechcaravanparts.com lists the CP plus control panel (as do others ) and if your Truma Combi boiler is the later type it may already have the required PCB fitted to connect to the later CP plus control panel ( 2013 onwards with a black body boiler , instead of grey) . if in doubt ,check with Truma giving them the serial number on the boiler and they should be able to tell you if your boiler is CP plus ready.
 
Aug 19, 2007
564
242
Birmingham
Funster No
120
MH
looking
Exp
2001
chippy63 www.caratechcaravanparts.com lists the CP plus control panel (as do others ) and if your Truma Combi boiler is the later type it may already have the required PCB fitted to connect to the later CP plus control panel ( 2013 onwards with a black body boiler , instead of grey) . if in doubt ,check with Truma giving them the serial number on the boiler and they should be able to tell you if your boiler is CP plus ready.
mines 201, so will need board & controller. will see what it costs for caractech. thanks for the info.
 
Apr 22, 2013
911
661
Cotswolds
Funster No
25,654
MH
Bailey Approach 625
Exp
Since 2011
BusyBuilder and others, I need to replace/repair the control panel on my 2013 6E combi boiler, but can't see how to get at the control panel to remove it.
The manual shows how to remove the top part of the casing to get at the 12V fuse. Its easy as it just lifts off upwards, Can anyone explain how to remove the rest of the casing to get at the whole of the control panel. I'll like to do this with the boiler in situ which has limited access. Thanks in advance.
 
Oct 10, 2018
2,024
1,149
Bracklesham Bay, West Sussex
Funster No
56,646
MH
PVC
Exp
Since 2005
SomeoneElse There is a strip down for the Truma Combi shown in the Motorhome technical articles part of the Resources section (in the site menu) that shows the PCB and how it is held in place which may help.
 
Last edited:
May 31, 2015
11,798
45,065
Cornwall
Funster No
36,638
MH
Ducato PVC
Exp
Getting Better
There are two torq screws at the top each end and the plastic cover lifts off upwards.
The pcb is held on by plastic push tabs on the edgeā€¦šŸ˜Ž

757892B0-37BF-4E0F-BAB6-B42B5CAE0EE9.jpeg
 
Apr 22, 2013
911
661
Cotswolds
Funster No
25,654
MH
Bailey Approach 625
Exp
Since 2011
Just smiffy Thanks thats just what I needed. Does it just lift off when the two screwws are removed?
Here a picture of mine it looks the same can you or other tell anything from the serial number.
Boiler-control-panel1.jpg

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May 31, 2015
11,798
45,065
Cornwall
Funster No
36,638
MH
Ducato PVC
Exp
Getting Better
Just smiffy Thanks thats just what I needed. Does it just lift off when the two screwws are removed?
Here a picture of mine it looks the same can you or other tell anything from the serial number.View attachment 701673

Yes, once the two screws are out it lifts out and upā€¦

I did look on line for a replacement and there are a few about but in the end I fixed mine by soldering a dry joint that I foundā€¦
 
Apr 22, 2013
911
661
Cotswolds
Funster No
25,654
MH
Bailey Approach 625
Exp
Since 2011
Just smiffy I bought our MH new in 2013, the boiler worked flawlessly until this year, when I switched it on in September I nothing happened no lights on the controls (same controls as posting #3). There is 12V at the control panel and fuses are both good, I'm hoping there a 12V to 5V voltage regulator on the board that's blown and can be replaced. I've been clearing up Christmas stuff this afternoon once I've found my torq bits I'll take it out and get it inspected by my son who is big on electronic.
 
May 31, 2015
11,798
45,065
Cornwall
Funster No
36,638
MH
Ducato PVC
Exp
Getting Better
Itā€™s only just recently I know about this as Iā€™ve only had the van a short while.
My problem was that it was working just fine then I pressed reset on the controller then I couldnā€™t get it to work again, after several fixes from problem I found (mostly dry joints) it still didnā€™t work, I then fed a direct 12v feed to the heater and it works so I have a problem with the ds300 that feeds itā€¦ Iā€™ll resort to giving it its own feed from the battery with a fused line to solve itā€¦.

Here was my thread..

https://www.motorhomefun.co.uk/forum/threads/truma-combi-control-problemā€¦.274873/#post-5389096
 

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