This video is brought to you by sportlin quality integrity and tradition. Well, we got a call on a walk-in cooler. That's not working right, they're, saying it's like 50 degrees in here. Let's get back up into here, see what we got going on uh.

It's not iced up, there's a digital stat right here. It says 50 degrees, so yeah looks like the coil's a little bit dirty, but we're gon na have to go up under the roof because it looks like it's calling. Okay, so we come up onto the roof. We've got a couple different, condensing units here.

This is our unit in question. Well, that's not good. Condenser fan motors are running, but it's cold condenser. So what i mean by it has a cold condenser is when the compressor runs right.

It's moving heat. Okay, the whole refrigeration cycle is moving heat from down in the evaporator up to the unit, and then you also have the heat of compression. So, with the heat from the refrigerant that is absorbed down at the evaporator and the heat of compression, that the compressor is creating, the condenser typically is a lot warmer than the ambient temperatures. Okay.

So when you walk up to this unit and you find that the condenser is cold, but the fan motors are running, there's a major problem there, so that's the whole point that i'm trying to make here so yeah, that's not good at all. We have to get this guy opened up, get all the panels taken off, see what we can find all right. Both condenser fan motors are running. The compressor is not the compressor is warm, but it's not burning hot, but it's definitely warm um, we're gon na start by checking voltage and we're gon na get some probes on this guy to see.

If there's gas in the system definitely got a strong vibration, this equipment is really beat down. It's like our compressor contactors down here, so we'll get in on that real quick. All right got the field piece. Sc 480 right here, we're gon na check incoming voltage line.

One to two 209, two to three 209, one to three: 206 okay, so we have three phase power coming in, let's check the load side of the contactor one to two 63 volts: that's not good! Two to three 109 volts; that's not good, and one. Two. Three 207 volts. So that's a problem: let's look for a voltage drop across the contactor line.

One has zero line. Two has a hundred and twenty uh volts uh, measured across the contact, and now so we've got a massive voltage drop. Honestly. I bet you it's going to be a bad contactor, but um we're going to go ahead and power cycle the unit we'll show not power cycle, but we'll shut it down.

Okay and then we're going to open up that contactor and have a look inside there and see what's going on in there, that's not allowing the voltage to pass through it. The fact that we have good incoming voltage is a good sign. That means that we have three phase power coming into the unit, but it's just not exiting the contactor. More than likely it's going to be a failed contact or pitted out contacts or something all right over here.

This contactor we pulled it open and uh. It's really pitted up in there really bad there you go so we're sending uh or we went downstairs to go, get a new contactor for this guy and uh. We'll hope that that's all that's wrong with it. We'll have to see.

So we got the old contactor out, we're still currently wiring in the new one. What we found uh, obviously look at the points. They're completely pitted out huge voltage drop across them. That's an issue, but all the little connectors were bad several of them, so we're replacing a lot of the connectors because they were loose um and they just weren't making a good, solid connection anymore.

All right we're getting big picture here. Okay, we're taking the time we're trying to figure out why the contactor failed and what potentially caused it or other problems that can be part of this and or create other problems later loose connections at the contactor. That's some big picture stuff you're solving some headaches later by looking at the big picture, so we're currently doing that we've got the new contactor in, but we're having to fix the connectors and and then we're gon na hope that when we start it up, the compressor Restarts, that's the hope, all right. If we did everything right, which we think we did, we double and triple checked it.

Everything's wired back in it's a mess down there, but we should be good to go to turn it on. So one two three: please don't blow up compressors running nothing blew up so we're gon na. Let the system run for a while. Now it's gon na be under a very, very heavy load, we're to go ahead and while we're letting it run we're going to probe up, we've got a giant mess up here, we're going to get some joblink probes on this guy and then we can analyze the System, but because we just turned it on we're going to let it run for a bit before we try to cycle it off again, we'll clean up wires and everything after we're done all right.

The system's been running for a few minutes. It's still 47 degrees in the box, i'm using the fieldpiece joblink app currently right now we have 19 degrees, evaporator superheat 18 degrees, but it's still really high in temps. So the valve is flooding right. Now, it's opening.

We need to give it some time to stabilize out now again that is evaporator superheat, okay, so we're going to let it run for a little bit. Let it bring the box temp down and then we'll test. Some more features um checking to make sure the defrost clock pumps it down and all that good stuff we're gon na. Let it run for a bit.

So i came down here to check on the box. It's about 45 degrees um. It's struggling to come down to temp, but i predict that the box has been down, meaning that that contactor has been bad for probably the whole day. I'd say because uh they were closed on thanksgiving, so today is uh friday november 26th, the day after thanksgiving.

So i predict this went down the night before thanksgiving is what i'm thinking all right. This equipment's doing everything it can it's 43 degrees. According to this, in the box and um heat is uh a little bit high 17 degrees 15 degrees. It's moving.

It's not horrible! For still being 45 degrees, it's still got to come down, so we just got to let it go. I'm going to seriously talk to the customer about replacing this equipment. This vibration is going to cause a leak. Eventually, this stuff is just beat down.

These condenser fan motors - you guys, can't see it but they're vibrating, really bad, but um. Everything else is good, so yeah, i don't really have much more to say. Um contactor is good. I guess the last thing we need to do is just test the defrost.

So we're gon na click it into defrost and make sure that it pumps down. So you can see on the job link app. You can watch it as it's happening, so we should see that start dropping and we want to see it shut off because we messed with the wiring for everything. So we want to make sure we didn't, you know screw something up, so we want to see the actual shutdown.

So it's dropping. Let's give it a second. You see, like we lost connection with something for a minute, but the cool thing is: is it just retries and reconnects? So it's a cool thing about the joblink app also, i probably didn't say this, but we are running a clear sight, glass, the entire time. So i don't see a problem with the charge, we're just waiting so notice a second ago it climbed up to like 210 psi.

I have a feeling that that uh, that receiver is slightly like really close to the top like it was struggling to pump down because now it's kicking butt should be shutting off here any second, and if it's not, we may need to adjust that pressure control yeah. I'm going to adjust the pressure control just a little bit because i don't really want to get below 10 psi. These compressors don't like doing that. Also you see how this fan motors, stopping before that fan motor.

That could be an indication that the bearings are going bad, but okay, i'm going to make a quick adjustment on the pressure control and then other than that this thing's doing everything it can so we're going to tell them to keep an eye on it and i'm Going to strongly urge them to consider us replacing this equipment because it's just beat down. Sometimes these calls can be difficult calls. Sometimes they can be easy calls, but it's also very easy for an easy call to become a difficult call right. So i just went around a whole confusing thing there, but always start with your basics.

Okay, you walk up and you check the symptoms. In this situation i felt a cold condenser. I was like something's, not right. We started doing voltage checks.

Obviously, we found a bad contactor. Okay, don't assume that it's just a contactor look further! Now i evaluated the situation. I gave the customer a big picture diagnosis. I also repaired a couple things: the loose connectors.

Those are so important and easy to overlook. You think it's not that big of a deal, but those connections need to be tight and, if they're not they're, going to lead to a high temperature situation, which is more than likely going to lead to an electrical failure of some sort. Okay also contactors have a shelf life. Okay.

What that number is. It just depends on the the components and the things that they're made with, but realistically contactors fail. Okay, um, they have a life cycle and they do need to be replaced. So we need to keep on top of that kind of stuff.

Now this particular customer doesn't do routine preventative maintenance. So here's a sign. Here's your sign kind of a situation right. You know they kind of get what they get but doing routine preventative maintenances and the commercial side i mean even on the residential side.

Sales are easy if you just open your eyes and open your ears and just check what you're supposed to check. You know sales. Don't have to be sleazy, you don't have to be selling death to grandmas or any of that stuff. You can simply just open your eyes and evaluate what's there and give them real, factual, um, honest information and let them make the decisions.

Okay. In this situation, we replace the contactor. It's not that difficult. I looked at a lot of other issues and we gave them a big picture quote and we'll see if they end up replacing all the equipment.

They certainly would be smart if they did. But you know what, if they don't it's? Okay right! I really appreciate you guys making it to the end of the video you're amazing. The support that you all have given me has been awesome. Uh.

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I really really appreciate you and uh. We will catch you on the next one: okay.