Pellet Stove Control board repair Applied Control Electronic DHC 4110

CRS!

I was a bit hesitant at revealing I have the ability to read said chips info. But what I don't know is if I can program them. Some of these chips might by OTP only or bit locked. But we shall see.

Might pick up a cheap baord from brand A to try and reprogram into brand E sooner or later.

 

Thats some great information! Didn't realize you were that geeky/nerdy! Figured you had a crew of hired guns doing that for you. Very impressive indeed!!

I had the luxury of said fella's that were assigned that task! So I really never got to learn much ladder logic. But that is how I got my electro/mechanical skills. Being the only guy on night shift, I had to improvise and do some of the electronic repairs. Had many of the GE/Fanuc/Seimans logic cards dissected to find the bad components to get the machines back up. Got to look over a few smart fella's(AKA nerds) shoulders but the boss was always on my back to get the next mechanical issue solved.

Once I was moved to the maintenance shop. I never got to play as much unless a tech was out. So I lost a lot of the PLC stuff. Not sure I really want to go quite that deep again. The memory isn't as sharp now. Plus I gotz lazy now! The electro/mechanicals are enough to keep me busy.

As far as the safety for over fire, The high limit snap disc should be adequate. Adding another in the venting As snowy did with her rig, would be an added bonus/back up safety to be sure the feed is shut off and the controller goes into shutdown. Along with the vacuum switch as another safety I can't think of anything else besides the hopper switch for safety devices.

 

I was bored and started searches for stove controllers. Found this on fleabay. Fella's out of Portugal. Pretty neat though!

[USA] Universal Pellet Burner Controller | Boiler Oven Stove Wood Pot DIY Kit | eBay

Not sure I want thermocouples and I guess you would need to figure out your own safeties?

 

Some of the test stand stuff is out for delivery. Should get a good start on it today! Also need to hit the local hardware for some incandesents, Nothing but led's in the reserve.

I'll add a real auger motor and some 120v fans down the road if it kicks off.

 

Cool stuff! Thanks for sharing!!

 

Test stand in action. Still waiting for a few pieces but its functional. Put my good spare board on it and watched it cycle. Tested the POF Need 2 more toggle switches to check vac and Hi Limit. Also need another terminal strip to easily check the voltage on the Combution and convection blowers.

Put board 3 on it and got the yellow multifuel light. Pushed the fuel mode and it switched to pellet mode, But the green light went out. Start button would not start the cycle?? Jumped the start button with a wire and walla. Off and running. I had some switches so that is replaced and the board cycles. But No auger or ignitor until the new relays come in. At least they finally shipped. Should see by Wednesday.

 

Productive day as the parts came in for the board(finally), Snow in Minnasota had them socked in for 4-5 days!! I was able to find a socket for the auger relay. So no more desolder to change that!


Finally gotz to use my new solder station. Nice havin a set temp so as to not cook things!! Shoulda bought one years ago!!

 

Boards is all squared up and on the test bench! So far so good! Nice having a test stand too. No more tear the stove apart only to find I gotz ta do it again!!

Next adventure is the firmware. See if I can tinker there too! But likely too brainy for my dumb azz!

EDIT: Awe crap! Forgot to solder the teminal block back for the thermostat. Where da heck did I put that??

 

I'd be happy to help if yours gets a kaputz

Even with what I spent, I am nowhere near what a new board costs. I now have 3 working boards instead of none!

 

Here we go again with a board that doesn't do as it should. A fella I know asked if I could check out his board to see if it was the problem with his auger not feeding pellets? Of coarse I said yes, and it arrived yesterday, So I tossed it in the test station quick like and gave it a couple of cycles. No light coming on for the auger motor. Its the light to the far left. Should be on from the start!!