All the individual components of my WP1021 work, but I cant get the system to fire up.
anyone with even a little experience? are there any hidden fuses?
looking for the black box controller module if anyone has any leads.
found the controller 0015457232 that has been on fleabay for the last few years.
maybe I'll get lucky and that will fix mine?
Guessing you have this diagram already?
Where did you get that diagram? :)
Quote from: floyd111 on 20 October 2017, 05:58 PM
Where did you get that diagram? :)
Searched some old posts here on the site.
I just acquired the installation manual - in German that I am translating, as well as have a copy of the operating instructions, and an original MB supplemental heater booklet (in 8 languages)
https://www.manualslib.com/manual/1002034/Webasto-Wp-1021.html
IN ENGLISH..
yes I have that, it is the later operating manual, not the installation manual, which has much more technical specs and operating parameters that will be useful for troubleshooting and installing.
wow.. missed that.
I have only the user's manual here, no help to anyone.
Sorry I can't help. I've only once seen a webasto installation, was on a 6.9 that I worked on.
I spent the last couple of days translating the entire manual. the web technology is amazingly helpful
1. OCR scan original and save as .txt
2. upload to website to translate german to english
3. save a .doc
4. go thru and correct all the words that OCR messed up using goggle translate.
6. read manual to learn how it actually works.
5. 4x enlarge wiring diagram and study
BTW this morning I found that there is a 2 wire connector that I have not plugged in, now need to find where in car it disappeared to...
english translation attached hopefully
Nice work Robert! Maybe mods can add this to the library?
Quote from: daantjie on 24 October 2017, 08:41 AM
Nice work Robert! Maybe mods can add this to the library?
I also sent him a pdf of the original manual. it was too big to post here.
Quote from: rumb on 24 October 2017, 07:53 AM
I spent the last couple of days translating the entire manual. the web technology is amazingly helpful
Let me know if you need help with any of the translations, especially with some technical things the web services sometimes reach their wits end.
--Marcus
Thanks for sharing!
Like any other part of the 6.9 this is going painfully slow. I have tested and fixed each component of the system, yet it still only begins the first steps of startup.
I am planning on removing the system and putting on a workstation board so that I can more easily access each component and build a manual set of switches to simulate each step that the controllers does. At this moment I am suspecting that some or one of the thermostats or fuse links are not working. If they are not, then finding parts will be extremely difficult, though I am bidding on a 24V unit on ebay currently that I can rob a few parts from.
Another option is I found a brand new unit, but unfortunately 24V so it would require voltage converters to be installed in my system. most of the electrical parts are different between the 12V and 24v models.
Still I persist!
start up sequence attached
Awesome. I admire your tenacity with this. I hope you do get it sorted.
Hope you are keeping a fire extinguisher handy for all these shenanigans :o
After studying the wiring diagram and startup process I deduced that the thermo fuse was blown, thus leaving open the circuits that allow the 2nd step of startup, those being the fule pump and the air blower. I was worried that this would be some unobtanium part, yet I am please to find out it is a very common electrical component.
Thermo fuse NTE 8139
Attached are pictures of the original and the replacement part. you may notice that someone has already replaced the little thermo fuse before. You just solder one end onto the wire and cut the other lead off!
Parts (with extras ordered)
deleted duplicate post
Please keep the reports coming. there is very little out there on the webasto's, so it's pretty important stuff, me thinks.
BTW, would the thick blue "Sonderausstattungen" book be helpful here?
Just found purchased a WP1021 spared parts manual from somewhere in Finland. Will copy in few weeks when it gets here.
As old as these are, EPC and Mercedes part numbers are useless as all parts are NLA.
Just received Webasto parts manual. Part numbers no very useful as searches only found one part in Russia available. But good to see breakdown of unit.
getting close, but fuel atomizing chamber I cannot seem to get working. I may have just purchased a complete 24V unit that I can take that part out of. but most electrical parts are not compatible with my 12V unit. will probably resell once I get what I need.
:D