BBS SPY wrote:

I read this thread with some interest myself and must before anything else add my personal commendation to Ian for his ground breaking work.

Some time ago, perhaps a year or so back, i was asked by Wiggs to do an FBH control module capable of replicating the timer mod but in a more cost effective, easier and neater package.

However although technically doing this is no problem, time constraints and higher priorities have meant that we have been unable thus far to spend any time on doing this.

However during my recent work on a D4 to D3 wheel conversion project http://www.disco3.co.uk/forum/topic44385.html?highlight= which has now moved to adding a wireless link to accomodate paddle shifting, i believe i have figured a way to also and easily incorporate remote FBH control using a regular and low cost plip.

It would be really easy for me to add PC conectivity to our design such that anyone could also jack in with a PC and use this Webasto software as well.

Praise indeed I am touched!

IanNP wrote:

There are three errors that have no obvious meaning STFL, SAFL and RZFL.
The STFL is some kind of Safety Temp for the water.
Also I don't know the diff between Interlock 1 amd Interlock 2.

mattgreen wrote:

IanNP wrote:

There are three errors that have no obvious meaning STFL, SAFL and RZFL.
The STFL is some kind of Safety Temp for the water.
Also I don't know the diff between Interlock 1 amd Interlock 2.

Ian - do you have any thoughts on where we might find out? I guess Webasto should know - does anyone have a good contact there or with a friendly Webasto service agent?

...hold on, I've just done some Googling around...

STFL - see http://www.motor-talk.de/forum/abkuerzunge...95271.html - this link is in German but you can get Google to translate (at least my Google Chrome browser does). The guy says that STFL means a Störflag is set, I think this means an error is stored (often called flags in software engineering).

SAFL - from the same link as above - "...describes the normal state of an auxiliary heater / heater before the start"

RZFL - I don't have an answer yet but I am now in contact with a guy who has written some software that communicates with WBUS devices (Webasto's data bus). I'm going to get hold of his software (it's open-source so freely available) and see if it gives more detailed diagnostics.

Does the Webasto Thermo Top software give details of specific errors or does it just show STFL, SAFL and RZFL?

Looking at the code behind this guys software, it appears that STFL, SAFL and RZFL are overall status codes of the heater rather than detailed error codes - there is a list of error codes, I'm just finding out how to access them and what they mean.

My feeling is that there's always lots of questions on the forum about FBH's locking out but very few of us seem able to get to the root cause as to why - some are the obvious causes (low fuel, air-con off, vehicle tilted beyond 5°) but if there's a fault in the FBH itself it's not that easy to diagnose.

I took mine to the dealers, they cleared fault codes, ran the priming cycle, it fired up, let it cool, it started up ok so they declared it "working fine". However, after 3 or 4 starts it only runs for a short while before cutting out - I don't trust them to do a thorough diagnostic...

Anyway, as I find out more I shall post info on here.

Matt