This video is brought to you by Sportland Quality Integrity and tradition. Interesting. This morning we have a call on a beer Walkin It actually came in yesterday and the call is that the beer Walkin is too cold. it's freezing.

Everything they said when they got in here this morning it was like 28. Um, what they did was they cycled power at that switch which shuts off the evaporators and the temp control. So we're going to turn that back on and uh, get a and see what the temp control says. It turned down the fans down below so we're waiting for that to uh start.

I Wanted to give it a few minutes before we did anything but I just came up on the roof. Looks like we just came out of a defrost. Time seems to be accurate. It's right.

I Think it might be a little bit off. Let's see what time it is. It is 7:46 so yeah, it's not bad. says 8:00 a.m.

good in there. Interesting. Okay I don't see anything crazy here. Let's come on over here.

We've got three compressors, walk-in cooler, walk-in freezer, beer walking, it's running Clear Sight Glass which is typical rack. It's pretty dirty. not like plugs, but the rack's dirty that's for sure. Okay, well let's head downstairs and see what my thermometer says compared to the digital thermometer or the digital thermostat.

So we have two evaporators. You've got a power switch that shuts off the fans and shuts off the power to the control. Okay, and their complaint is is that they're freezing the product. So the first thing that I'm going to check is look at the thermostat.

Okay, so I come up here and I've had my thermometer in here for a few minutes. My thermometer says 34, their thermometer says 46. This control is not working right? Uh, whether it's a sensor, whether it's the control, we'll have to open it up and see. but it's failed and it thinks that it's warmer than it is inside the Box While I was gone, I had Robert clean the rack for us.

so now we got a clean rack. I had to go get the temp control anyway. So I'm going to get back down there and get that thing changed out now. All right.

I'm going to go ahead and replace the entire control, but we are going to put in a Nema 4X control that has a little more water resistance to it. This one is not really meant for this so you can have water intrusion on the back and it's not even mounted. Um, with as much moisture as they get in this box, we're going to do that. So I'm going to swap it out real quick.

So this, uh, new control. it's the it's the same brand. it's a ETC Control still does all the same stuff. same multivolt.

It just happens to be a Nema 4 enclosure so it has the the ears for the screws to go in so it's much nicer. I Love this control. Um, and you can just mount it to the wall right there, put a couple text screws in it, and then Mount the sensor. The one thing this control that was in here is really really old and I can tell because it has the old school sensor, they haven't had a rigid sensor in a couple years.

Theirs now are really flexible and you can actually break the sensor. It's one thing I don't like and I know everybody says why not go to a K2 or whatever I just try to keep what it is, try not to ruffle feathers, make it easier. Another thing to think about. on the previous control, they had two wires jammed into this terminal right here on the far right and instead of doing that, just do a triple wo and it's much nicer, much less potential for a loose connection.

You can actually tighten down on the wires like that. I Went ahead and moved the sensor away from this bulb I don't I'm I'm sure that was affecting a little bit once the air got moving in here. I Don't think it really affected it but moved it away and actually put it in the return right here. So let's uh one, two three, please don't blow up.

see what happens here says 47. Let's go ahead and uh, set it or 35 with a 3 differential. There we go. We are all set up now.

I'm going to put a thermometer up there and make sure it's accurate. This guy says about 36. My thermometer says about 36 about half a degree off. I'm happy with that.

but I was sitting here thinking about it I had it set for 35. We're not going to go that we're going to go to 36. There we go, we are good to go. I'm just going to jump on the roof one last time, make sure that the sight glass is clear I'm going to turn it on right here and then, uh, once we're good there, we'll be all done.

All right. We are back in running in our sight glass. we got a nice big SP Orland SE All right there. nice and clear.

So because they were complaining about the Box being too cold I don't really see a need to apply service gauges. we found it was a bad temp control. There's nothing indicating to me that there's a refrigeration problem so we're good to go. We are going to give the customer the keys and uh, tell them to keep an eye on it.

So I got the temperature controller right here and you know what I was talking about is this is not a Neema 4 enclosure. It's really meant to be mounted. You You know somewhere where they're not going to have moisture intrusion and different things like that. So will it work? Yes, this control has been installed for a very long time and it has worked.

But when it becomes a problem I try to put Nema 4 enclosures in and that's the ETC 141,000 is the Nema 4 enclosure. So I'm not going to go and just change these just to change them right? Cuz there's a lot of walk-ins that have these installed. But when given the opportunity, I'm going to go ahead and upgrade them and put a Nem for enclosure in there. So uh, this one right here doesn't look too bad.

There's definitely some moisture intrusion because you can see rust build up. uh on the Transformer uh. whether the problem was just in the sensor or in the control I don't know. but like I said, since it wasn't the right model control to be installed in there.

Anyways, I went ahead and got rid of it. Put the Nema 4 and the customer is happy. So I'm not going to go into these restaurants and just start changing parts because I don't like what they are right? But in this situation, we had a failed control. Now it's possible that we could have changed just the sensor on this one, but I brought it to the customer's attention and the customer agrees with me that hey, you know what? it really wasn't the right control.

It does have a bad sensor, but hey, let's take the opportunity. let's go and upgrade it to the right style of control. That's an Neema for enclosure and you know, be done with it and that's what we did. and again, I include the customer in these decisions.

So that way they understand why I do what? I Do they get it? Okay now, I'm going to say something right now too. Uh, I'm going to go. You know, be honest that there's been times that I've had to install the ETC 111000 Uh, that's the original non- Nema 4 enclosure. That's a very common control in a lot of reaching coolers Walkin freezers, walk-in coolers.

I've seen them installed in all different applications and like I said, even I have had to install them incorrectly in situations where they maybe shouldn't be. They are a very, very versatile control and even when they're not installed in the you know the proper uh setting, As far as the Nema 4 versus non- Nema 4 enclosures, they do last quite a while, but still given the opportunity I try to put the right control back in there. That way it operates better. Uh, it is actually rather difficult to find supply houses that stock the Nema 4 Etc 141,000 Um, so you know sometimes it's a Friday and you got to do what you got to do and you just put in the control and you know it'll last a while.

But like I said, I was there. we had an issue with the control, we just changed it out. Now let's talk about what made me, uh, go directly to the control. Well first and foremost, when I walk into a walk-in cooler situation like this where they're complaining that it's getting too cold, there's typically two things that could potentially cause that walk-in freezer to get too cold.

Typically in my setup, the way that this system is arranged, it either could have been the liquid line solenoid valve or an issue with the temperature controller. Okay, the fact that the customer explained to me that hey, you know what, when they shut off the box, it stopped freezing and it did. Okay. so what they were actually doing was cycling power all throughout the day previous.

Uh, cuz it happened on a weekend. They put in the call but they said don't come out till Monday So they were just kind of cycling power making it operate. So that tells me a lot because if it was a stuck liquid line solenoid valve, turning off the power switch would have shut off power to the control, but the solenoid valve would continue to let refrigerant go through and more than likely with the fans off, the coil would have froze up. In this situation, when I walked up to it, the evapor coil was not frozen up right when I turned on the switch, it took a second.

then I heard the solenoid valve close, I heard the refrigerant flow through and then I put my thermometer up there and noticed that the temperature controller was you know, 10 12 off thinking that it was warmer in the Box than it was. Customer was saying they were maintaining about 25 24 in the Box Well, that makes sense if the temperature controller previous was set for like 35 36 and it was 10 to 12 off. Well, it was getting 10 to 12 degrees colder than it should be. Okay, so there's a lot that goes in that maybe I don't capture on video.

My brain and your brain is your best tool. When people ask you what's your, what's your favorite tool, what's the best tool that you have in your tool bag? It's your brain, right? and it's your ability to use common sense and experience to diagnose problems. So every step that I make in that restaurant or actually, let's step back. from the moment that I get the service call to the moment that I walk into the restaurant, to the moment that I'm completed with the call, my brain is working the moment I get the service call I'm looking at it going Hm I'm looking at the customer's notes I talk to the customer.

They give me more feedback and all of that adds into the diagnosis that I'm going to come up or perform right and essentially come up with the solution to the problem. And remember when we're using the big Picture diagnosis method, right? we are solving the problem and not the symptom. That's the whole point, right? The reason why I started talking about the big Picture approach is simply because I was sick of having so many call backs and I was so sick of just assuming the first little thing that I found was the problem changing a part and saying you're good to go and then getting a call back and then call back until I finally realized that it's more than just the initial problem that you see, you got to look at the big picture. Hopefully that makes sense for you.

So as we're going through these videos, you know as I make these videos. That's the whole point of them right? They originally started from my employees obviously I realized there was some value, made them available to the public I am not perfect. In no way am I perfect. I never will be perfect.

Okay, uh, but I just try my best, right? Um, I I make mistakes just like you do, right? I just happen to catch them on camera and try to use them as an example in hopes that maybe just maybe you'll think twice before you make the same mistakes that I have made Again, thank you so very much for making it to the end of the video. If you haven't already, please check out my website Hvacr Videos.com We have merchandise available: Hats, beanies, sweatshirts, zipup hoodies. We have all different types of hats too. We have have flat bill hats we have Dad hats that are like relax fit hats.

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