Broadway heating controls

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Broadway heating controls Empty Broadway heating controls

Post by Oldfolkie on Fri Dec 19, 2014 8:52 pm

i have just picked up our new Broadway (EK TB LP) and it has the Truma combi blown air heating system.  I understand how the control panel works but it only seems possible to operate the system if tap symbol on the main motorhome control panel is lit.  If this is not the case then the heating control panel shows an E255 error message.  Can other users of this system please confirm whether this is normal?  I have been through the handbook but cannot find anything that relates to this.scratch head
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Post by Backtrax on Sat Dec 20, 2014 12:24 am

My 2010 Broadway has the Truma Combi heating system. The control panels may be different but at the end of the day the boiler must have a 12v supply to work. On mine this means the habitation 12v power must be switched on. The separate switch for the water pump (tap symbol) can be on or off.
It may be that when AS built yours the 12v supply to the boiler is taken from the pump, although I cannot see why they would do this.
Do you have separate switches for overall habitation power and water pump, or is it that the habitation power switch also powers the water pump directly?
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Post by Oldfolkie on Sat Dec 20, 2014 10:26 am

Thanks for your prompt reply. Yes, there are separate switches for habitation power and pump and if it were just the habitation power that needed to be switched on I would fully understand but it seems to need the pump to be switched on and that puzzles me. Perhaps you are right and AS have taken the power to the heating controls from the pump.
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Post by Peter Brown on Sat Dec 20, 2014 11:45 am

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It seems you have the CP Plus controller installed rather than the manual controls described in the manual posted on the AS web site.

If you follow the link above and download the CP Plus installation and operation instructions you will find on page 31 the trouble shooting guide. For fault code #255 - The device to be operated is not connected to the power supply.

There must obviously be a supply to the CP Plus so I can only assume that the power to the combi unit comes from the pump 12v supply. If that is the case then you have a fault as in the winter with the van drained down you may want to operate the heating and would not want the pump running all the time.

I'm not sure when they close for Christmas but I would suggest you ring the AS service centre and ask them.

Peter

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Post by Backtrax on Sat Dec 20, 2014 12:50 pm

Seems Peter is agreeing with me.
As he says if the power has been taken from the water pump then this is totally unacceptable indeed it makes the heater 'not fit for purpose'
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Post by tcc on Wed Jan 28, 2015 12:52 pm

I'm not sure if this problem has been resolved but I can confirm as I have the same unit which I bought Dec last year that the heating is turned on with only the AUX button turned on.

I do not have the pump livened up as well.

It sounds like a wiring fault that needs to be corrected.

Tony
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Post by inspiredron on Wed Jan 28, 2015 10:06 pm

tcc wrote:I'm not sure if this problem has been resolved but I can confirm as I have the same unit which I bought Dec last year that the heating is turned on with only the AUX button turned on.

I do not have the pump livened up as well.

It sounds like a wiring fault that needs to be corrected.

Tony
But on my van the AUX button turns on the awning  light ! My heating works with the normal power switch on the EC328.
An annoying feature is that the EC328 has a timer feature. You can go out and get the lights to come on at a particular time, for example. But you cannot get the heating to come on with that control because if the heater is left on at its own controls it will not work when power is applied until it has been switched to th eoff position and then back on again.  But, then again, that is a safety feature.

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Post by tcc on Thu Jan 29, 2015 10:19 am

Yes sorry I'm wrong, the Aux switch is for the awning light and I should have said that it's the normal power button that switches on the heating.

But again I do not have the pump switch on for the heating to work.

That's the trouble with using my memory from the comfort of the armchair  scratch head

"inspiredron" I was watching a video yesterday that explains the timer on the heating controls and you can arrange to have it on before you return but obviously you would have to leave the normal power switch turned on as well.

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I have yet to try this it but it sounds simple.

Tony
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Post by inspiredron on Thu Jan 29, 2015 1:52 pm

tcc wrote:Yes sorry I'm wrong, the Aux switch is for the awning light and I should have said that it's the normal power button that switches on the heating.

But again I do not have the pump switch on for the heating to work.

That's the trouble with using my memory from the comfort of the armchair  scratch head

"inspiredron" I was watching a video yesterday that explains the timer on the heating controls and you can arrange to have it on before you return but obviously you would have to leave the normal power switch turned on as well.

[You must be registered and logged in to see this link.]

I have yet to try this it but it sounds simple.

Tony
Wheww !  (mops brow)

As far as timer is concerned, you have the new control with timer built in. Sadly, I have the old rotary manual controls for heating and hot water. With those if either 12V or 240V drops out the heating and hot water naturally goes off but with restoration of power they STAY OFF. So, if I leave the pitch without physically turning the heating and hot water off and then return they won't work until I physically turn them off and then back on again.  I suspect this is a hangover from the controls on the old convector type heaters where it would be a saftey concern if they came on by accident.
As I said, my control panel (the EC328) has a timer function on it but the safety built into the heating means that I cannot use it for that.

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Post by Oldfolkie on Sat Jan 31, 2015 4:43 pm

Thank you for all the replies.  We have spent some time away in the MH and I was obviously doing something wrong, I know not what, but the system now seems to operating happily as long as the power button is switched on.
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