Parking Heater Install - Working but with CAN error message

[andy500]

Hi Everyone,
First off a massive thanks for all the great minds on here that have helped me over the past couple of weeks to get my Caravelle to operate as i want to. As of this morning i have managed to successfully get the Webasto Auxilary heater to operate as a parking heater with a telestart remote. Everything seems to be functioning correctly but when i scan the car i have a fault code that won't clear. As per below pic. I have also included a snip of the current coding on the heater unit. Any ideas how i clear this? Any help much appreciated and thanks again for the great forum!
Cheers
Andy

 

[mmi]

how i clear this?

Just install the overhead control/timer unit.

Post in thread 'OEM Webasto Auxiliary Heater To Parking Heater Upgrade'

7 Mar 2020

To complete your now almost Nordic setup - an OEM control panel/timer working in parallel with remote.

Added functionality:

• timer (3 programmable times - time + week day -> max week ahead), however they are just one shot - can only activate the next event (can't activate repeats e.g. automatically every Mo-Fr at 6:15, need always to "authorize" the next one).
• set mode: heat or ventilation only
• set heat/vent time on remote (as in pic 30 mins)
• child lock

...

• mmi

• 

Post in thread 'OEM Webasto Auxiliary Heater To Parking Heater Upgrade'

19 Apr 2020

There is one side effect of this "retrofit" - one permanent fault in Aux. Heater (18).
0266 - Databus
U1121 00 [009] - Missing Message
[TIMEOUT mDachdisplay]
Luckily there are no practical consequences of that fault.
It appears that connecting Telestart unit without the overhead timer is the cause
Normally as a standard factory option the overhead timer always comes with Telestart.
Next step is to work out coding modification which will clear this fault

Can confirm the cause. Disconnected my overhead timer panel - and as expected the same fault as above.
Did...

• mmi

• 

 

[andy500]

Thanks very much @mmi. That’s really useful! The remote will serve my needs for now and if the fault code doesn’t cause any issues I guess I can just live with it for now. I will keep an eye on eBay for a no timer though.
Thanks again your help is hugely appreciated