So we got a Saturday evening: service call walk-in freezer and a walk-in cooler. This is an older restaurant. This is their semi quas, a refrigeration rack, it's a cool bus. I walk down into the restaurant.

The walk-in cooler is that 41, which isn't too bad, but obviously there's something going on and the walk-in freezer fans aren't run here at all. So we're gon na open up the rack and see what we've pulled the covers off the rack right now. The first thing I noticed when I pulled one of these covers off was it's about I'd, say 140 150 degrees in here right now the swamp coolers running, but I guarantee the water pumps not ready, and this thing has to have that water pump running in order To force the air out, these done Luva right there, so I imagine we're gon na have some kind of overheat issue. The walk-in cooler is actually running but we'll see we'll go through it all, but the walk-in freezer.

It's like we got one fan motor running, but my compressors hot, and it's not running right now, so we'll get into it alright, so I don't know this might be good at that. Our compressors not running. If you can tell right here, our contactors pulled in. I already checked with the meter: I've got three-phase 208 coming in in three-phase 208 going out.

The compressor is hot. So, let's hope it's just off on internal overload and we don't have open windings, we'll find out right now, I'm going to cool off the compressor with a water hose and see if I can get the windings to reset. So all that I'm going to do is just very carefully cool off the head of this compressor without getting everything else wet. Just like this notice, I put the electrical cover back on so that way the water wouldn't go into the bottom of those conduits trying to keep from soaking the condenser fan motors, I'm just gon na.

Let it cool you John, will keep going on the process for about five minutes, see if we get that reset okay, so I cooled off the compressor and it is what I thought yeah. The compressor was off on thermal, so now that I cooled it off, I can read resistance between all three windings. It's equal. This is a three-phase compressor, so we're getting about 1.9 on each of the windings.

So now the question is: is the compressor bad? I'm gon na have to put it back together and turn the power on, but while I was sitting there when I first walked up, I noticed that that left fan motor was running, but this one was not is locked up. So, let's just hope that it's just an overheated compressor and that it hasn't been doing this long enough to cause damage to the compressor, keep in mind that the water pump, I'm pretty confident, is not running on the swamp cooler and we lost a condenser fan motor. So we've been running off of one and here in Palm Springs, which is where we're at we're actually out LaQuinta. They were damn near close to 90, if not a little bit higher today.

So I can imagine this thing to constantly overheating all day, so I'm gon na put it all back together electrically and try to start it up and see if the compressor is good and then, if that's the case, then we'll work on getting that family changed and Getting that water pump fixed also, they called me about their walking cooler, which is this unit, and when I date they said it was out like 50-something degrees. But when I got here was at 41 degrees and it has satisfied since I took the doors off this rack - it satisfied five minutes after I took the doors off, so I'm pretty confident that this was overheating. Also, all because the water pump on this swamp cooler wasn't working so I'll, look into that a little bit more, but because that was at 41. I'm not too concerned with that.

At the moment. I'm pretty sure it's you know down to 35 by now, but I'm focusing on the walk-in freezer right now. So this would be the moment of truth also, you know we're assuming everything's properly grounded, but I also just saturated this whole area with water. So we want to be cautious about standing in a puddle of water and turning a circuit breaker on luckily there's not too much water over here, but you know I'm just saying you want to stand back when you're doing this just to make sure we don't got A grounded compressor, god forbid, we had a grounded compressor, you know worst case scenario and the unit wasn't properly grounded.

That would be scary. You know, especially when I'm standing in a puddle of water, so we're gon na flip. This guy on that doesn't look too good. Nope she does not look good at all.

It did not start, then turn it off and cool it off a little okay. So yeah, that's not a lucky night. For me that compressor would not start. I kicked it a few times.

That's locked up the drawers lock. Rotor amps, then it goes off on internal overload. I tried cooling it off again. Nothing.

So we've got three phase power going to it. You turn on power. It hums for a second drawers. Locked rotor then clicks out on overload nothing.

We can do so. I get to have a fun night change and the compressor tonight so got some light setup and got a whole thing going on we're going to recover the gas right now and then get to changing it's going to be a fun night I'll. Try to keep you guys in the loop, so I had a hell of a time getting this rotor lock nut off leverage is our best friend blew my mind, because when I pulled the the nut, something red fell out. It's that little red plastic thing right.

There. There's a little piece of something down there and I'm flipping out wondering what the hell it is holy crap. It's a freaking plastic light thing that plugs the copper pipe or something so wonder. This thing has worked as long as it did do that that's crazy blow! Your mind, some of the things you'll find that's nuts.

It's amazing that things ever worked like that, just a little tip, I've got the compressor out. I'm gon na go ahead and change the condenser fan motor. Since it's easier, you know, then I'm gon na trip over the compressor and I haven't decided yet, but I'm thinking about changing the high pressure control too. I'm assuming that the thing was shutting off on high pressure, but just happening so much that the compressor went off on internal overload, but I really don't know so it's kind of a gamble.

I could leave the high pressure control charge it up and test it, but then have to recover all the gas. So I'm thinking that since I've got the compressor out all the gases out, I'm gon na go ahead and just put in a dual pressure control. It's got a high and a low. This thing also has a fan cycle control on it, but we really don't need it out here so we'll see.

I think I'm gon na go ahead and replace it since I got it all out. Just you know that way. I don't get a trip over the compressor trying to change all that stuff so far, so good other than that piece of plastic tripping me out, I'm pretty sure what that is. I'm pretty sure that was the red plastic cap that comes in the rotor lock now, but what's really tripping me out, though, is that wrote a lock valve, that's factory, I think see.

I think if I remember right on this condensing unit. I believe that the condensing unit comes with the rotor lock valve, and you make your connection right here. So I think that was a factory mistake, because I know it whenever you buy a wrote a lot valve. It comes with a red cap right there on this side and that's factory on this compressor.

I mean on this condensing unit. It's really tripping me out. I can't believe that, because we added this CPR valve just because it was a walk-in freezer, but I'm pretty sure that it comes with this right here and then you just stop into that road. Oh damn that blows my mind, nothing's been running for that many years.

Okay with this big old plastic piece in there, what a trip, so it's been a long night but compressors replaced charging it up right now, didn't really run into any problems. What I ended up doing like I had mentioned before, I ended up pulling the fan cycle control out of the picture. Just wiring up both condenser fan motors, to run all the time, and we don't have cooling of the weather out here. We're not gon na have to worry about the fan cycling.

I ended up changing the compressor contactor, also just to be safe and liquid dryer, of course, and that's pretty much it so we're just gon na. Actually, I just got the liquid line or the receiver full of gas, so I'm gon na go ahead and turn the power on in pop. The cylinder ID valve on downstairs. Get some gas flowing be kicking on right.

Now there we go. That's what I'm talking about we're just gon na charge it up she's running like she should be. That's good got a flashing sightglass right now, but I got ta charge it so we're good! I'm happy I'll, get this charged up and finish up. Okay.

So it's running pretty good got the sight glass cleared up, let the system run for a few minutes. I initially put some gas in there got it operating cleared up the side. Glass set the CPR valve. I wanted to make sure the CPR valve was set correctly because of that debris I found in there.

You know that could have been affecting the way the CPR valve was set before so I made sure under a heavy load, I adjusted the CPR valve. It did have to adjust a little bit. I got it to the run. Load amps pull down.

Basically, so now we're just watching it come down in temperature systems running good. So far I want to let it get cold enough to test the defrost just to be a hard percent sure. So I just want to kind of recap what happened here. I got a service call today on a walk-in freezer, not working when I called them back to confirm the service call.

They said all the sudden now they're walk-in cooler was not working either. The manager was complaining that the walk-in cooler was at 50 degrees and the walk-in freezer was well above freezing. I kinda already had a hunch, because I know this restaurant and I know the way that this rack works. It's pressurized by that swamp cooler that swamp cooler has to be working or all the heat from every one of those condensing units pressurizes this thing any and it just overheats everything everything goes off on high head pressure.

So when I got here, what I actually found was the swamp cooler was running, but the water pump was not running. So all those condensing units are putting out all that heat and it's just blowing 80 degree, air or ninety degree air, which is what it was out here today across them, and it's not enough to get that heat out of that rack. Okay, so that was problem number one problem number two was that we had a bad condenser fan motor. Also on that walk-in freezer condensing unit.

I honestly believe that that condenser fan motors been bad for a while and probably what's been happening. Is today was one of the warmer days out here of the season of the spring, and I have a feeling that that thing has been cycling on high head pressure. For a while now so much that it ruined the compressor, the compressor went off on thermal overload so many times that this time it didn't come out of thermal overload and it locked up, seize the bearings or something inside there. It's just a hunch, because, obviously I didn't I wasn't here but more than likely that's what happened.

So it took me a little while once I diagnosed the compressor, I had to go open up a supply house pick up the compressor. I had to go pick up. Some more lights, because I didn't have enough of these lights to light up this area recovered the gas, replace the compressor, replaced the dual pressure control now I kind of said something earlier in the video. The reason why I change the pressure control is, I was assuming that the compressor was shutting off on high head pressure, but I wasn't here to see it so it's kind of like a cheap insurance thing.

I don't know what caused that compressor to go off on thermal, whether or not if the high pressure control wasn't working. That could cause it to go off on thermal overload or if it just went on and off so many times on high pressure. It could also cause it to go off on thermal, so just as kind of a cheap insurance. I went ahead and replaced the pressure control.

I ended up changing it over to a dual pressure control before they had just a low pressure and then a high pressure and a fan cycle. This system doesn't necessarily need the fan cycle control because the climate we have out here, it's there's, no need for it. So I went ahead and bypassed the fan cycle control or took it out of the picture and just wired up high and low so now we're operating properly. Also in the video I showed that I found when I pulled the rotor lock fitting off of the suction service service port.

On the compressor, I found a giant red piece of plastic stuck inside there and what I believe it was was the actual plastic that comes shipped with the the service valve and it was all sheared off. So that was interesting because I found that plastic in there. I went ahead and adjusted the CPR valve to make sure that that was set correctly and everything else is operating. So what I ended up finding on the swamp cooler was that the water pump is just so dirty.

It had a screen on it and the screen was doing its job it just plugged up to where it wasn't allowing the water pump to run or to pump water. Basically, so the pump was still running it just wasn't able to pull anything through all the sludge that was stuck on the screen. The swamp cooler is in really bad shape. It needs new pads.

We've already told them about that. So what I'm gon na do is. I just went ahead and cleaned up the pump for now got it operating we're gon na come back out, put new pads on it new belt new water pump, just for the hell of it. It gets so hot out here in the spring and summertime they regularly hit a hundred and twenty hundred and twenty-five even higher, sometimes so that swamp cooler, pretty much is gon na run from this day, all the way until October now and right now, it's it's the Beginning of April or a week into April or whatever so that swamp cooler, basically, if they maintained it properly, they'd probably need to change pads on that at least two or three times during the summer.

Because of how much it runs, it really plugs up those pads. So anyways I'm gon na be coming back, we're gon na. Let this thing operate through the rest of the weekend and we'll come back out check on the the compressor again make sure everything's straight with it and then we'll change those pads on that swamp cooler and get that operational and other than that. I'm just gon na clean up my tools, put the panel's back on the rack and hopefully get out of here soon.

That's it!.