Truma System (1 Viewer)

[RobRoller]

Hi, thanks for allowing me to join, this is my first post...

My heating system was working fine last week but when I tried to turn it on yesterday the panel is completely blank!
Tried unplugging it etc, checked all the fuses on the Moho, checked the fuse on the boiler but all good.
Any other suggestions please?

 

[David and Sally]

I assume your battery is not flat. Are other systems working? Hope you sort it soon.

Have you got a multimeter to test voltage at the boiler? Any of the leds showing on the boiler?

 

[RobRoller]

I assume your battery is not flat. Hope you sort it soon.

No all fine

 

[RobRoller]

I assume your battery is not flat. Are other systems working? Hope you sort it soon.

Have you got a multimeter to test voltage at the boiler? Any of the leds showing on the boiler?

Hi...I wouldn't know where to start to be honest

 

[GeoffnDee]

Have you checked if the display power supply fuse (1 amp ) , that may be located behind the display panel , needs replacing ? .

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[RobRoller]

Have you checked if the display power supply fuse (1 amp ) , that may be located behind the display panel , needs replacing ? .

Hi, someone else suggested this but I can't see one, is there definitely one there? I'll try if so...

 

[GeoffnDee]

It should be in the permanent 12v supply wiring to the display , the 12v supply to the boiler also needs to be ok for the display to work. Are you able to check that these supplies are ok with a multi-meter ?

 

[RobRoller]

It should be in the permanent 12v supply wiring to the display , the 12v supply to the boiler also needs to be ok for the display to work. Are you able to check that these supplies are ok with a multi-meter ?

I have a meter but unsure how to go about it

 

[David and Sally]

I have a meter but unsure how to go about it

Anyone local who can whizz round and do a quick check for him. ?

 

[GeoffnDee]

If it helps ,The permanent ,fused ,12v supply to the display is the red (positive) cable going to the rear of the display. (the red/black cable is the negative side)

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[Speve]

I’m not trying to teach you to suck eggs but have you pressed the turn button to set it? Or sometimes just a disconnect of cables at the back and reconnect after a couple of minutes will work?

 

[Cockers]

When you press the button to turn it one do you get the cog and a clock symbol in the bottom righthand corner. I had this problem and was informed by a Truma engineer to remove the data cable out of the boiler and the 12v fuse leave it over night. Then plug the data cable back in and put the fuse back in and it came back to life.
my issue was the display unit lost connection to the boiler via the data cable

 

[Krumpli]

When you press the button to turn it one do you get the cog and a clock symbol in the bottom righthand corner. I had this problem and was informed by a Truma engineer to remove the data cable out of the boiler and the 12v fuse leave it over night. Then plug the data cable back in and put the fuse back in and it came back to life.
my issue was the display unit lost connection to the boiler via the data cable

We had a problem with a similar solution. Sometimes the Control Panel starts beeping, especially when driving. I found that by removing the Control Panel from from the woodwork I could see around the back. There was the Data Cable and Plug. I simply remove the plug and reconnect it to solve the beeping problem. The MH is a 20 year old Bessacarr. Maybe modern MHs have different systems.

 

[RobRoller]

When you press the button to turn it one do you get the cog and a clock symbol in the bottom righthand corner. I had this problem and was informed by a Truma engineer to remove the data cable out of the boiler and the 12v fuse leave it over night. Then plug the data cable back in and put the fuse back in and it came back to life.
my issue was the display unit lost connection to the boiler via the data cable

Hi, no, the panel is completely dead, nothing on it whatsoever

 

[RobRoller]

I’m not trying to teach you to suck eggs but have you pressed the turn button to set it? Or sometimes just a disconnect of cables at the back and reconnect after a couple of minutes will work?

Yep tried that

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[RobRoller]

Anyone local who can whizz round and do a quick check for him. ?

Would be great if at all possible, thanks

 

[RobRoller]

Have you checked if the display power supply fuse (1 amp ) , that may be located behind the display panel , needs replacing ? .

Someone else suggested this but can't actually see one through the small square hole

 

[RobRoller]

When you press the button to turn it one do you get the cog and a clock symbol in the bottom righthand corner. I had this problem and was informed by a Truma engineer to remove the data cable out of the boiler and the 12v fuse leave it over night. Then plug the data cable back in and put the fuse back in and it came back to life.
my issue was the display unit lost connection to the boiler via the data cable

I've tried unplugging it but can't find the fuse, think I need to locate this fuse by the sounds of it

 

[GeoffnDee]

If there is power at the red 12v cable supply connection on the rear of the display that would confirm the 1 amp display fuse is ok. ( or not )
The other 12v supply fuse is under the wiring cover on the Combi boiler

 

[G10]

Have you tried contacting Truma Technical Support, they are excellent. Either email Technical@trumauk.com or telephone 01283 587960

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[Lenny HB]

Have you tried a reset on the boiler, there is a reset button under the cover.

 

[RobRoller]

Have you tried a reset on the boiler, there is a reset button under the cover.

Hi, okay I've managed to get to the boiler...question is where I'd the 'reset' please?

 

[RobRoller]

Quick update: few people suggested resetting the boiler so I've eventually got to it but where is the reset button please as it isn't very obvious

 

[RobRoller]

Pic...

 

[GeoffnDee]

Not all Truma combi 12v pcb have the reset button , but if you have one , (I think it depends on year of the Combi ) it will be just below and to the right of the room temperature cable connections (blue/brown ).
I assume that you have removed the missing 12v fuse and are the 12v supply (red + black ) cables ok as they look crushed in the photo.

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[RobRoller]

Not all Truma combi 12v pcb have the reset button , but if you have one , (I think it depends on year of the Combi ) it will be just below and to the right of the room temperature cable connections (blue/brown ).
I assume that you have removed the missing 12v fuse and are the 12v supply (red + black ) cables ok as they look crushed in the photo.

Yes I took the fuse out to test it and thanks I'll have another look at it tomorrow - the cables are fine, must be just the pic thanks

 

[Marauder]

Does the 12v consumer panel need to be switched ON to activate the Truma unit ?

 

[Fdhadi]

Does the 12v consumer panel need to be switched ON to activate the Truma unit ?

Yes

 

[Andacami]

You need habitation 12v on, certainly with my Truma you do.

 

[Lenny HB]

Does the 12v consumer panel need to be switched ON to activate the Truma unit ?

Depends on how it's wired, most German Vans have a perminant supply and the panel doesn't need to be on.

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