This video is brought to you by Sporland. Quality, integrity and tradition. Got a complaint of a Dell field two, four, six drawer cooler not working on the bottom. I Suspect the Top's a problem too.

And my first step I didn't put gauges on it or anything. Uh, I'm noticing that there's some Frost coming back to the compressor. so I Wanted to open it up and look in here. Look at this dinner.

Look at that. Yum! That looks all nice and warm and toasty. That makes like a good gravy, huh? But uh, check that out. Look at how one coil is iced up and one coil is not.

That's interesting I bet you it's gonna be a TXV problem with that coil would be my guess, but let's dig through this a little bit more. Got my little pump spray right here with just some hot water. We're gonna get this guy defrosted and then we'll finish evaluating everything. but I Have a feeling this one's going to have a bad power head.

The temperature controllers on this side it senses this coil temperature, but it turns a solenoid valve in this one on and in this one on. So majority of the time it's a failed power head and this coil is trying to do the entire load trying to cool the entire six drawer unit and it usually can't keep up so it freezes up so, but we'll keep going through it when I'm defrosting this. I'm not really concerned about the bottom of the coil I'm just putting my little wand on the top and letting the water drip down. It seems counterproductive, but it's actually more productive, you know? Uh, you at least for me I tend to want to like.

Oh, let's get the big chunks of ice because you get the most satisfaction out of it. But if you really just defrost from the top, you're defrosting the entire Center mass of the coil. and eventually, once the coil is defrosted completely, that water will start defrosting all the ice on the bottom. So get in these Corner rails in here too.

very important to make sure you get those completely defrosted. I Have a feeling I turned power back on I Have a feeling that our problem is the TXV Okay, so let's turn the temperature controller. that solenoid is opening and closing. I can hear both solenoids opening and closing, so that's a pretty good indication that the solenoid's probably working.

There's always a possibility, but it's very rare that a solenoid's plugged up on the stuff that I work on. So next, we need to test the TXV to see if it's the power head. once we get in here. the test for this.

Once you do this, you have to change the TXV Okay, but this is going to tell me if something's stuck in the TXV or if the power head is the problem. So what I'm going to do is I'm going to cut the sensing bolt that has a gas charge in it if I get little to no gas coming out of it, then it's just the power head. And if there's a lot of gas coming out, more than likely there's something wrong with the TXV Almost nothing. Almost absolutely nothing.

meaning that the power head is bad. so we can go ahead and replace just the power head. now. this customer is replacing both this entire unit in the next four months, so they just want me to do what I have to do.

Even though the coils look like junk, they just want it to fix. So I'm going to change a power head on it today. All right. Got this other side opened up so I can access the TXV and the sensing bulb better.

We're going to go ahead and recover the gas now so we're hooked up. We've uh, we need to purge right here. Okay, all right, we're good, We're good, we're good, and we're gonna hit start and we'll go ahead and recover the charge out of this guy. Then we'll unscrew the power head, change the liquid line filter dryer, and then hope that that fixes our problem.

Now this system has Txvs and it does have a receiver, but there is no King valve on the receiver to pump the system down. So that's why I'm having to actually recover the charge off this guy. Um, if it in a perfect world we would have a receiver. King valve.

We could just literally pump down the refrigerant charge and not in this case these. Regions They're probably rather small so they usually don't put valves on the receivers if they have them. The sensing bulb literally just came off. it was only being held on by that tank junk.

I Very carefully tweaked the valve down to access the power head a little bit better. Again, you have to be careful because these coils are really fragile and we're done. We're recovered right now so we're going to go ahead and hit stop Purge Purge out the remaining refrigerant and the high side hose and everything they can out of the tank or the machine and then we're good to go. Go ahead and stop.

turn it off and I'm gonna go get all the stuff I Need to change out the power head in the dryer. Foreign foreign foreign foreign foreign foreign foreign foreign foreign foreign. We got powerhead installed sensing bulb wrap with insulation tape. We've got the new dryer installed so now it's time to pull the evacuation and start putting the coils back together.

Just got done putting all the coils back together. Got my scale? We're getting ready to charge it I Just turned off the vacuum pump. we're currently in decay and I'm satisfied with that number. so we pulled down to 500.

It slowly rose up to 921 and we're good to go. Now It's not ideal that I'm using gauges, but this is a really small system. If I try to use my giant hoses and take out the cores and stuff, you're likely to break something from the weight of all the hoses and all that. So we're gonna weigh the charge in.

This guy takes 32 ounces of 404. So I uh turned off the system so that way the compressor doesn't start up and we're just about done, we're at 31 ounces. We're gonna go ahead and close this down. I was just weighing in through the high side and letting it come back up through the low side and we're right at 32 ounces so we can safely make sure these are closed and we can turn this on and turn this on.

Watch the unit start up and then I have a thermometer here. We should see a drop in temperature so at the moment it's reading 70 degrees so let's give it a few minutes. If the coil is working, that'll drop significantly. The system is slowly, uh, stabilizing out again.

I Have the coils open so it's going to be under a load right now, but uh, feels like it's cool already. Let's give it a look. We're at 59 degrees so we're clearly working on this coil now 56 degrees, 55 degrees. So yeah, we're good.

Both coils are working now. I Need to put the drawers back together and watch it come down to Temp and make sure it shuts off at the right temperature. All right, we are pumping down right now and the condensing unit just shut off and box is at 31 so that's a little cold so we're going to turn it a little bit warmer, but we'll see what it turns on at. But I'm satisfied.

We're going to give them the keys and uh, that's it for now. Hopefully this will last until they get the whole unit replaced. Okay, it's very important that you understand what you're working on in this situation. I Was very familiar with the operation of this region cooler.

If you're not familiar with the way that it operates, download the installation and operation manual and it'll give you a basic understanding. So this was just a basic pump down system, but it had two evaporator coils, one temperature controller. The temperature controller was in the right side evaporator coil. Each coil had a solenoid valve and a thermostatic expansion valve.

In the situation of this video, the evaporative coil on the right hand side had a failed power head for the expansion valve. Now I could have changed the entire expansion valve. It would have probably been a little bit more difficult and I would have had to have ordered the valve unless I went in with an aftermarket valve. But for these manufacturers, even though the operation of the valve is the same, there actually is a difference from an Oem valve, to an aftermarket valve the one that you can go buy at your supply house the the ends.

The connections are shorter and oftentimes the valve is a tiny bit taller as far as the total height of the valve. So I prefer to stay OEM especially on these tiny little reaching coolers whenever possible. But in this situation, because they had a Sporlin expansion valve, I didn't have to change the entire valve. What had failed was the power head and that's why I did that test where once I was sure that everything was working the solenoid valves as best as possible.

I clipped the tip on the power head for the expansion valve and when I cut it, if it's a good power head, you will see a gas charge released. It'll spray out a little mixture of gas. Okay, that would indicate to me that more than likely there was an actual problem with the internals of the valve Now, even furthermore, if you wanted to get really crazy, you could actually just rebuild the existing valve. If you had an Oem one with the same internals, you could just take those out and put it into the new valve if you needed to.

That's assuming that the strainer because often sometimes the expansion valves will have an inline strainer on these OEM valves that's braised into it wasn't plugged up. Okay, but anyways, going off on a tangent as usual, I was able to get in there and change just the power head. So I recovered the refrigerant out of the system and I was able to go ahead and unscrew the power head, screw a new one on, insulate the sensing bulb, properly, secure it, put it all back together, change the liquid line filter dryer, pull an evacuation, weigh in the refrigerant charge, and start the system back up. Once I started it up, I watched the unit come down to temperature and all was well.

Couldn't really find anything else wrong with it. but I will say you guys saw how disgusting the inside of that box was. Okay I leave that up to the customer a good majority of the time they want you know like they don't even know how dirty it is until I get working on there. But actually one of my frustrations is when I show it to them and then the customer is like oh well, you have the box apart can we clean it? But here's the issue with that.

I I Would love to let them clean the box, but I'm in a time crunch and they want me out of their kitchen, right? So typically you need to be out of these kitchens by about 10 a.m 10 30 a.m at the latest. they typically open at 11 A.M and they need to be able to prep put all the food into the region and all this stuff. So if I was to stop what I was doing when I first started working on this and let them clean the box for an hour, that would set me back an hour. So oftentimes when they ask me hey, you have it apart, can we clean it I say no, you guys need to do that on another day because I'm on a time crunch and unless you guys want me in your Cooks line well into your lunch, you know then you guys need to just clean this at another time.

Let me finish what I'm doing. Okay, there's times when I'll take it apart and go scrub the parts myself. but in this situation I really didn't have time to do that. So I made the customer aware that hey, you guys do need to clean this You know this is gross.

It needs to be taken care of but I'm not gonna I wasn't gonna spend any more time on it to that day because I didn't have the time you know and I had to get them up and running. Okay so I do like to clean their equipment when I can I like to make it all nice and shiny but then also I'm under a time crunch and in this situation just had to get it operational. Okay, so I left that to them, told them to give it a good you know, deep clean. basically turn the box off one night deep.

clean the heck out of it, hold not to spray it down. you know who knows what happens with that. One thing I will say is is shame on the manufacturers of these units because they make them dang near impossible for the customer to really get in there and clean it. I mean I Get it.

It's the easiest to clean it when I have the whole box apart because you got to take all the drawer boxes, apart the drawers out. There's a bunch of screws and everything. but you know these manufacturers when they're making this equipment. I Get it that they're under a crunch from the customer and the customer wants a cheaper, faster, better kind of thing.

But you know this is all on the manufacturer because they're the ones that designed it and made it dang near impossible for the customer to take this box apart. It is what it is. Thank you so very much for making it to the end of the video. It is really awesome! I Do have to say I Just got back from the Ahr trade show and uh it was very humbling to meet a good good amount of you guys that are watching right now.

A lot of people walked up, got to take pictures, shake their hand, have conversations and I apologize to the people that you know. Had to wait a little while to talk to me because I try to give everybody the amount of time that they want. So I tried to spend as much time with each person that wanted to come up and have a conversation with me and I tried to, you know, spend as much time as I could. so hopefully you all understand.

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