Glow Worm (Valliant) UltraCom 30cxi schematic

[underwurlde]

Hi,

In trying to fix the control PCB for my boiler, I reverse engineered a schematic that then showed me where the fault was. I now share this in the hope that it may now help others.



Note: This is a FULL circuit diagram and INCLUDEs components NOT FITTED (N/F) to the PCB - for this I have made an educated guess as to what these components are (not that it matters of course).

NOTE!
Resistors: R1, R3, R18, R19, R13, R12, R32, R30, R36, R37, R11 & R6 are all 4K7 (if otherwise marked differently).

My version of the PCB:


3D rendering of my copy of the PCB


3D rendering WITH non-fitted comps:


Hopefully it's all correct but DO NOT assume that it is of course.

Cheers,

Andy

 

[Dan Robinson]

And I thought I needed to get out more.

 

[Phill Peck]

I don't know anyone who would even understand what you've posted....

If your pcb is broken buy a new one

 

[Whitespirit66]

The second one would look great on my lounge wall. Interesting use of colours.

 

[PEDANTICVINDICTIVEMAN]

Yes

 

[manortim]

i don't get what is being done here?

how does all this help you?


if you're a RGI gas guy.....then you're talent is wasted fixing boilers that any trained monkey can do.....

if you're not a RGI.....really.....you shouldn't be touching the boiler in the first place.


we ALL need to get out more!!

 

[underwurlde]

It helped me to replace a 50p capacitor instead of spending £100 on a new PCB and now my water is hot, house warm. Also I was bored, stuck in doors with man-the-fk-up flu. No, I'm not an RGI and hence no Gassy type things were touched.

 

[manortim]

when i'm bored....i have a tug!

 

[underwurlde]

^ maybe, but I have had enough snot coming (fnarr fnarr) out of me as it was. GF wasn't going anywhere near me either. Oh, cruel world.

 

[muggles]

It helped me to replace a 50p capacitor instead of spending £100 on a new PCB and now my water is hot, house warm. Also I was bored, stuck in doors with man-the-fk-up flu. No, I'm not an RGI and hence no Gassy type things were touched.

...except, of course, the small issue that the PCB controls the gas valve, and the fan (which affects combustion) and the flame rectification etc etc, so technically gassy type things were most definitely touched

 

[Rampage77]

Amazing what you have done, way above my head. I have now realised I am just one of those trained monkeys fixing boilers

 

[underwurlde]

Me too, just trained monkey in something else mate. This may look complicated to you, but so does pumbing work look to me.

 

[Mike4]

Well I'm impressed.

Did you start off by photocopying the board?

 

[Garfeild]

The second one would look great on my lounge wall. Interesting use of colours.

Looks like the night map on my sat nav

 

[transam]

cannot get the image up on the lap top ? but

Is this one of them in-famous symsi pcb's an example of carp electronics dumped into boilers by some manu

Symsi is probably some word that translates or means "Turkey" ???

power cut symsi can go t*ts up , turn the fuse spur off symsi can go T*ts up

Breathe on it symsi can go T*ts up etc etc

Gloworm should get an award the "electronics turkey award" along with Johnson & Starley for the Reno carp & the legendary potty suprima pcb