THE CUSTOMER CREATED THEIR OWN PROBLEM 

Yep. Idiocy increases price.

Just like when they ask for a discount before you even tell them the price... Triple it, then take off 10%. 😁

Also, It always catches me off guard when the video isn't sponsored by Sporlan, haha. And gosh, your dog is so beautiful. Australian shepherds are such beautiful, and friendly/energetic, dogs. (And deviously smart as our dog growing up could attest. Sometimes too much for her own good, haha.)

Yes she is extremely smart and very devious, she figures out ways to do what you tell her to do in her own way… 8its hard to explain but she is amazing

​@HVACRVIDEOS Australian sheppered. Herding breed. Extremely smart :) And yes, she is gorgeous.

Those boards and their circuits look to simple to justify a more expensive multi layere PCB, but it is not impossible. However, lloking at front and back of the board, you are certainly right, this is a thru hole connecting the ground plane across the board. There are likely more connections like this connecting a lot of copper areas to one single ground plane. It may not even be uncommon to have multiple such holes connecting the same plane, just for reduced resistance or sometimes even for better heat conduction. Those ground planes usually serve two purposes, the are a common ground for a number of electrical connections (like your cars body being connected to the batteries negative terminal and only individual + wires going to the loads.) and they provide some shielding for components. Sometimes they are even used as a heat sink to a degree. The ground plane on the front looked like a bus bar along all those connector. So if you get something most likely wet, it can easily short out with some other connection. For such an amount of damage less likely the RS485 pins, but I think there was a + 12 V next to it as well. That one will sure do, and not in favor of the board. Someone with some expertise in electronics may be easily able to fix this board, but that would come with several risks. First of the major ones, in best case it is only that thru hole that got busted, simple fix. But I would not rule out other compoents getting compromised too. There may be unnoticed burnt out resistors, capacitors or even IC chips. And some components may be ok yet, but might have got stressed in a way, that they might blow up anytime between a few minutes and a few months from now. Second one, this is not something someone is doing a home, so who would want to warranty such a repair, not knowing for sure what else may have taken a hit. This is why such a repair would not be viable, unless those boards would be impossible to obtain as a spare part and swapping for something else for some reason is not an option as well.

​@@alexanderkupke920 These are definitely multi layers boards. Used to work in PCB manufacturing

small amount of water in evaporator coil can damage board🤣 why board not in drain pan?

If that board has a conformal coating it is microns thick that is corrosion due to moisture that has damaged the thro hole plating simple

@@petenikolic5244 I guess it's possible, but consider it was working before they played with it.

Hard lesson. F around and they certainly found out. 😮

The lack of conformal coating - especially in that environment - stood out to me as well. Even the new replacement boards seemed like spotty coverage. It looks like they removed the via on the new board, though, so it might be a known failure point for the previous revision.

@@ZyxlianYeah, these are junk design. Blaming the customer is stupid.

Yep that "cheaper" upfront price is all many people look at and then are shocked later

Yeah, those "holes" are just "through holes" they are to connect the layers on each side, and sometimes also internal layers

And each layer is connected to each other through via's. So it looks like the 12 volt rail got shorted out to ground through the via

Jim was man when i was in school. He clarified so much. Rick Dave OC Marat they teach alot.

Heatcraft has all their info online it’s not a secret if the customer simply googled the Heatcraft password they would find it I just wasn’t going to tell them over the phone

I agree but as far as firing where dose it get you? You lost a trained employee that has learned a important lesson at this point. You let him go and now your not just out the cost but the cost to train the new person. My 2 cents

​@@michaelprescott387 Well said.

They cant even find employees to work you think they care if there employees “brake” something. Noooo these companies have budgets with there services they are fine

At least they have the passwords now😂 I struggle to believe 24v can make those marks. Especially as both did exactly the same thing at the same place. Especially as those marks are nowhere near the circuit tracks something else happened imho.

I’m guessing water splashed bottom of board from trying to clean up a freeze up

heatcraft or sporlan??

I would not give to much to conformal coatings. They are not too reliable especialy directly on top of something soldered. I was guessing furst as well what might have shorted here. But somehow the burn mark also looks like there is a stain like from liquid around it. And while I personally think it is unlikely the serial connection itself shorted, if I have sen it right, there was a + 12 V nearby. So if they, however on earth they managed to do that, got it wet, possibly not only by condensation but maybe by spraing a cleaner, or a mixture of the two, I guess the via or thru hole connection would the the path of leat resistance, or more correct in this case, highest resistance, and burn up. Looking at the board, there is a possibility to have multiple layers, but for this one just the front and back seem to be more likely. also looking at the copper areas on front and back, this is sure a ground plane (especially from how it looks on the back) or on the front something used like a common bus. And if this possibly was the only via to the back, this was kind of the weak link. For this size of plane or bus, i would honestly not have wondered if they would have put multiple vias across that area on the bottom alone. But then, those come with a price, and if technically not absolutely necessary, well, we all know modern days economics of producing such stuff. Also, if the thru hole did not blew out, some other component would have. Results may have varied, except for still the same being broken.

The plating of a via is usually thinner than the tracks, so the plating of a via burning up like a fuse isn't that unusual. If you had a circuit diagram it would be pretty simple to fix that with a bodge wire - even tracing the board out isn't hard as long as it isn't more than a dual-layer board - and I doubt they would have sprung for a multi-layer board for a simple AC controller.

@@alexanderkupke920 if you look there was another Via on the right from the same trace to the copper pour on the back (for all we know it’s ground or it could be 12+).

@@robertbackhaus8911 I think thats why you sometimes also find those plated holes being filled with a spot of solder. Just to get more mass and conductive material in there.

@@oscalerup1129 oh yes, youre right. with the size of the copper in the back I would suer say its ground. But besides what is visible, I wonder what components possibly got fried as well.

Also I liked the video of course. Just had some questions pop into my head while trying to understand. Also I’m not a HVAC guy. My career is CNC machines but I like learning about everything.

That is probably incidental as the boards get wave-solderded. Some vias will pick up some solder, others don't. It's not by design.

@@MrDubje I beg to differ. On the original you can see the one via near the com connection is soldered on the back and the via that shorted / corroded possibly to an internal layer is not soldered. On the new board both vias near the com connections are soldered on the rear and there are plenty of vias that are still clear. It is by design that they sealed those vias up. Either it was missed in the first two board or was an update to the new boards. But it's not just random. And wave soldering is more old school for mostly through hole components. These boards have a few through hole but mostly SMD components and are reflowed.

By the way, my workplace re-opened this past Saturday. Our menu boards are on back-order so we don't have any. The demo crew threw away all our headset batteries except for one, and threw away all our headsets except for two. Exhaust fan STILL hasn't been looked at. Delfield sandwich station STILL has five cuts in its power cord insulation. Problematic oven STILL not replaced, while they were cleaning all the dust and dirt left behind by the contractors they began baking for the next day, and the oven was over 100°F below setpoint, it was "fixed" the same day, for the... Sixth? Seventh?... time this year. We were promised full equipment replacement, we got exactly NOTHING replaced. Our hot cocoa dispenser was "absolutely" getting replaced in April of 2021, still waiting on that one! On the day they began cleanup (Fri) they noticed our walk-in cooler was at 86°F with door shut and locked, the day we shut the store down it was 51°F. The renovation crew plugged back in the water softener that keeps tripping the GFCI (and whose front panel no longer responds to button presses, and it hasn't been properly dispensing salt for over two years). Over a million dollars spent, so we can serve iced coffee like we're freaking bartenders. More electricity use for a tap system, more work for the crew to clean it, even less counter space (that was already lacking), but it's all about aesthetics. On what they loosely defined as "training" last Wednesday, I learned absolutely nothing because the Training Manager (whom I trained) and my new District Manager wanted to talk loudly to each other during the training videos. While there I did speak to someone who was from the Franchisee that was somehow involved in the renovations, and I began asking questions about the exhaust fan (he claims he didn't know), the front door alarm sensor (he didn't know), the walk-in door seal (he didn't know - "You know, you can order that," he said, and I responded with "They were ordered when we had the compressor replaced; we're still waiting.) I told him about the uphill drain pan line, too, and how our "Maintenance" condemned the cooler instead of fixing the drain line. I then told him to go talk to Carmen (Training Manager) and ask her about the list she asked me to make for her when she was Store Manager - a two-and-a-half year old list containing almost all of the concerns, with photos. Every other store's renovation "fell behind schedule," and ours was completed two days ahead of schedule... Don't need to be a rocket scientist to figure out WHY it was done so quickly! 🤬

For what it is worth: I agree with this tip.

You clearly didn't't even watch the video. He clearly stated it is a chain restaurant and it was just employees who wanted the pon

Threats are never the way to go, these local managers may work in the corporate office one day. Killing them with kindness than handing them a bill is the easiest and most diplomatic way. If the corporate office notices the bill they will ask and I will devulge everything they want to know

Feliz Navidad!

Feliz navidad para todos ustedes deseo que estén bien y tengan un extraordinario día cuídense por favor Dios los bendiga.

Ha ha , good to see you in the comments Dave!

Australian Shepard

I will discuss this live on RU-vid this evening 4/29/24 @ 5:PM (pacific) come on over and check it out ru-vid.comFDED8-PLSYI

@@HVACRVIDEOS i live in vienna. 5pm pacific is here 3am.