This video is brought to you by sportlin quality, integrity and tradition. This morning we have a kitchen ac, the bat kitchen, so this is their office and the back prep area and they say that it's not working properly. So this is a york predator unit, nothing too crazy. So let's open up the electrical section.

So these guys do have logic, and we can look in here and if you look in here, we've got an error message. So let's count them one. Two three: four: five: six, seven one, two, three, four: five: six: seven yeah! So seven! So if you come down here, seven flashes, if you come down here, compressor, lockout fs1, so we need to dive into this guy. So it's definitely off unlock.

So i always just do a visual first off that condenser fan blade is free, spinning, um, let's go right here. Let's see if this guy moves that one moves doesn't necessarily mean it's not bad, but we're just kind of visually checking out the unit. Now we don't have the disconnect switch turned off but definitely have an extremely loose belt extremely loose. So that's a problem um, maybe maybe some signs of oil on this txv right here.

What the heck is going on here, there's like a bolt lane in the bottom of the unit. That should be the tension bolt, so i don't understand what's up here, that should be going right here unless someone took it out for some reason: okay! Well right now we need to go ahead and reset this guy we'll go ahead and probe up on it and we can see what's going on with it so down here. It says: seven flashes, fs1, compressor lockout! If you go up here to right here at the top, where the legend at it tells you fs one and two thermostat low evap, temp, okay, so what would cause a low evap temp, just looking at this unit right now would be this extremely extremely loose belt. That would definitely cause a low, evap temp.

So honestly, there's no point in putting probes on this guy. Yet let's go ahead and tighten up that belt and then we'll finish: uh further troubleshoot these. So these guys, what we're doing is we took that bolt and we threaded it right back in it fit right in there makes me wonder if this unit is vibrating to all heck, because why would that thing be out? So we loosen these guys right here on each side up and then we can use that guy and that guy to evenly put tension, but we're gon na go ahead and change this belt. What you'll find is if the belts run really loose for a long time.

Number one they wear out the adjustable uh, sheave or motor pulley and then um. They also damage the belts. So we've got a new belt or somewhat new belt sitting in here as a spare that we probably left last time last time. So we'll pull this guy off put the spare in there.

So, while we're doing this, we're tightening up this belt, it actually just shut off, but i could hear that this one right here has a bad condenser fan, motor or something's going on, because the condenser fan motor wasn't operating it's locked up. I could hear it trying to start from over there and uh. I just quickly opened up this door and this one also has a loose belt. This is their other kitchen ac, so we'll definitely bring this up to the customer.

We need them to generate a work order before we can work on this unit, so we'll i'll go talk to them and have them generate a work order for that one too, but uh we'll get back onto this one. So we got the belt tensioned up, we're gon na go ahead and probe up on the unit and uh, just diagnose both circuits make sure everything's working properly. All right, i'm going to attempt to profile measure quick here and uh. Let's see if i fail at this again because i've been having a heck of a time, so i've got a two stage: compressor two separate stages: they're, not parallel.

Okay, so we're gon na go down here, um, multi-circuit or multi-stage. Now, apparently, they call multi-stage one compressor. One set of probes, multiple equipment stages. This is where i don't understand.

I would call it multi-stage. So if we click on multi-stage number of stages, two stages, okay, so stage one switch, please anytime, the circuit is switched in the app. Your electrical measurements will be cleared out. That's fine, okay stage, one stage two: this is where i get really confused on this, but regardless we're going to go into system info and number of stages too, it does not have variable.

Airflow nominal tonnage is 90 000 btus. It's a 7.5 ton, 410a 13 to 16 seer metering device is a txv all right. So that's that and i think we're good to go on this guy. It is not scroll compressors.

I don't think that's going to make a huge difference, but we're going to say reciprocating and then we hit continue all right now. We need to go in, and i've already assigned my normal probe, so we'll put that on the first stage and then we'll uh grab the other probes and put it on the second stage and we'll see what happens all right. We've got low pressure, high pressure, suction line, temp clamp discharge line, temp clamp. Then we come in here we have liquid line, temp clamp.

There is no liquid pressure port. So therefore, our sub cooling number is going to be a little skewed and it's going to be rather high because there is going to be a pressure drop if we come over here when we're putting air probes on these unit, i highly suggest we, if possible, you Actually place them in there, and another thing is this unit does have an economizer, so we need to make sure that it is not opening up when we're trying to service this unit. So you do have your setting right here. Let me grab a pocket screwdriver and we'll go right here to the minimum position, because, if the unit's working right, when you power it down that economizer damper should shut so we're going to turn and see how far it goes.

Okay, it's already turned all the way closed, so this guy is shut a hundred percent. So what i would suggest is that if you place your air probe up in here, you're gon na get a lot of mixing, even though this is closed, it's still going to be grabbing the outside air temperature and it's not going to be as accurate. So what we could do is when we're working on the first stage. You put the air probe down here when you're working on the second stage get a mixture of the two airs, because this side is going to tend to have a higher temperature.

Just because of the cavity in the dampers personally, the supply air probe, in my opinion, is fine right there, but the return is the one you want to get inside just from experience. So we'll put this panel up with like one or two screws and then move on to the second stage. Now i i mean it's got a slight vibration to it, but nothing that would concern me really. That seems normal, so, okay, all right we're gon.

Na close. This guy up and wait for the compressors to turn on probably gon na jump them out to make it go faster, or i know that i know the thermostat's calling so yeah. We should be okay, we'll give it a minute it's in a delay right now. It should be all right.

This compressor sounds like junk it's really loud, but i'm so confused on this measure, quick thing, because this is not really working. If we come over here - and we look at this when i switch between first and second stage - it's not switching the probes because the pressures are identical so yeah again, this is not the right mode. I i'm so confused. So one set of probes, multiple equipment stages, one compressor yeah.

No, so we go here and we do a number of circuits too. So now it actually switches the pressures. But it's still it's really weird. I don't understand regardless number of circuits, let's go through additional nominal tons and we got to redo this 90 000 btus expansion valve txv.

The rest of that is okay, compressor, type, reciprocating, okay, so we're back into here. First stage is, i mean we're just letting it stabilize everything's, looking a little weird at the moment, because it just turned on, but but yeah that multi-circuit multi-stage thing is really confusing to me all right. This guy has been running for a few minutes circuit. One i mean nothing's too too.

Crazy sub coin would tend to be high, usually see 15 to 16 degrees, because it's using discharge pressure going through here i mean everything's. Looking: okay, um, nothing, crazy air flows, a little funky looking, but that's not too crazy. All right! I mean nothing um like insane. I mean you know it's not perfect, but nothing insane right outside of the mark on suction, let's go to circuit two circuit two is running really low super heat, but sub coins kinda in line i mean it's a little bit low, but that could also be affecting By the low superheat, what could be causing that low superheat is the question um? What we actually need to do, the temperature split is not bad on the unit.

Airflow is not bad, i mean the unit's working. So what i think we need to do is we need to investigate the sensing bulbs on the txv's, because that really low super superheat kind of makes me wonder if we have an issue there, so i'm going to power down the unit we're going to open this Guy up and we're going to investigate the sensing bulbs and how they're strapped and where their strap, so where are they going they're not down there? Oh sensing bulbs are going through into this section and here so they are where they should be up in here right in here somewhere, oh yeah, let's see oh yeah, it feels like the sensing bulb's loose by moving it with my hand. So let me get in here, get this insulation off and then we'll get a look at it. So i got up here to the sensing bulb.

I had to pop the top on the unit a little bit propped it up with a cinder block, but it's loose, but i mean it's not horrible, but it could still use some love. It has a single, strap and then two zip ties which isn't the end of the world. The single strap should hold a bulb that small, it's just a two inch bulb um, but we're going to do some work to secure this a little bit better clean up. The lines you got to be careful because sometimes like it's kind of on a bend right there - and maybe it's not making good connection all right.

We ended up getting double straps on each one. They're super tight and they're in good places, we're gon na still insulate them. This one, i think, can go just a little bit tighter, but we, the important thing, was we cleaned off all the old insulation? You can see, we sanded it all up. So now we need to insulate them, but one of the downsides to the way they designed this is this is your discharge line.

This is going to be damn near 200 degrees in the middle of the summer, and you know that foam insulation is gon na. Have a hard time you know keeping that heat from infiltrating that which is kind of a bummer, but we'll do our best all right. We got this guy insulated strapped up. We also insulated the discharge line right in that area to try to dissipate some of the heat.

I don't think this is our only problem. This one was a little loose, but it wasn't that loose. So i don't know if this is going to solve our problem or if we're going to have more stuff going on, but we're going to start with this put the top back on turn the unit on and evaluate it from there. So i powered the unit back on, but i had to reset the measure quick stuff.

So as i'm going through here, what i'm noticing is is you've got to switch the circuits when you're profiling it, but it doesn't give you the active like so you could say three and a half ton or four ton, but i have a seven and a half Ton unit, so i'm just going to go 4 10 and see what happens. I mean yeah, it's a little different, but okay, so i think that's it. Txv continue circuit one circuit, two: okay. There we go on that and then uh we're just waiting for it to power up it's going through its uh delay right now at the moment, so gosh that compressor is loud.

Man, i'm gon na, have to warn him about that. Guy all right, um circuit, one is looking pretty good, superheat's, ranging it's moving back and forth. Okay, but it's adjusting like it should be. Circuit 2 is doing the same thing it's much better than it was so we're going to let it stabilize out and run a little bit longer.

The airflow is still really wonky on this guy and again it could just be my ignorance, but that, let's see what should we be running on a seven and a half ton, so two 24. 28. Oh, i guess we're right on the money. Yeah we're right on the money now, but it's weird, though, because when you change from stages the airflow goes wonky boom, it's kind of odd, but whatever um, but the temp split again we're gon na, let it stabilize some more, but it's looking pretty darn good.

Now, all right, i'm happy with this guy first stage - is looking pretty darn good second stage, looking pretty darn good, that's what i expect to see so um. What we are going to do is we are going to um just kind of warn them that that compressor sounds like junk. We are going to get another belt because we took the spare belt so we're going to get a one to replace that and put it in there, but other than that. This unit's good i'm going to go ahead and take my probes off of this one tell them they should have had me, do a regular pm and they could have saved a service call fee, but it is what it is right uh.

They did give me a work order for that one, so we're gon na jump on that one and see if there's any issues and then at the same time i talk to management and we're running around checking belts on all their units, because if this one has A loose belt and this one has a loose belt. The odds are all their other units. Have them too so we're going to check on those that way when we go to get this extra belt, we'll pick up any other ones, we need all right. There's no need to check voltage at this guy because it's just locked up the bearings are bad, can't even turn the damn thing it's like stuck.

So we pulled the side off we're gon na pull that motor out, swap it out. We got a brand new one right here. Just went to the um york distributor, so we got that we got a new capacitor too all right. This guy needs a capacitor because we change the capacitor with the motor, but the problem is, is, i don't know which capacitors which so you got one on the top? You got one on the bottom, so we're gon na.

We got an easy solution for this power's turned off and we're gon na ground out the brown wire to the capacitor okay. So basically, i'm gon na have someone over here, they're gon na ground it out, and i'm gon na test tone right here at my meter. Okay, so let's see what happens? Okay, we have direct short to ground, go ahead and take it off. Put it on.

Okay, now put it on the other. Capacitor leave the ground there, nothing, okay, so which one was it okay, so it was the top capacitor. So now we know which capacitor to change - and all we were doing was toning it out by making a direct short on this line right here. Okay, so it's this capacitor right here that i'm going to replace so we've got this motor replaced.

Reinstalled capacitor changed wired in this one's good, we're setting up our probes for measure quick. We just tightened up this belt just a little bit more because it was yeah, that's much better. It was still a little loose, so we tighten that up. We also have a spare for this one now so we'll leave that in there we're gon na probe up with the liquid line temperature clamps since we've got the panel open, then we'll close it up and then we'll probe up on the compressors all right for this Unit we actually got the spot over in the shade.

I can set it up in landscape mode and we're looking at this guy so circuit one i mean we're not looking horrible. The sub cooling is just a hair on the low side. Now remember. 10 degrees seems perfect, but we're using discharge pressure, so we usually see 15 to 16 degrees of sub coin.

But i don't know this guy i mean everything else seems to be working. Okay, expansion valve is opening and closing because we're seeing that number kind of fluctuate, which is pretty normal, okay, so, let's scroll over um, i mean this guy might be a hair low. On refrigerant, it's hard to say we really don't have a load. The return air temp is 72 degrees.

Temperature splits right where it needs to be air flow, seems kind of decent delivered capacity is a hair on the low side. Uh! Oh no see! This is what i don't understand on measure quick, it's confusing it when you go to circuit two, it gives you a normalized target, looking at both circuits. That's what's confusing about this to me, but whatever so first stage i think is okay but delivered capacity is just a hair on the low side. But let's go to circuit two: let's go back to uh, i mean sub cooling.

That's what i'd expected to be about 16 degrees superheats moving around i'm very reluctant to put gas in this guy because it's a micro channel and those are really tricky to charge in the field. I don't know: let's go back to circuit 2 and look again i mean 12 degrees, sub cooling. I think i'm going to leave this guy alone. This guy seems like it's working.

Condenser fan motor is working now customer's, not complaining. We actually found this unit while we were up here, so i'm probably going to let this one go and then just tell them to keep an eye on it. Now we have had a history with this one, if you may remember: 20 30 videos back maybe 40. I don't know a lot of videos back.

We had to cut this duct work out. We had to open up the side of the unit and repair a crap ton of leaks in that evaporator um, but i mean this: is it's questionable whether or not it's short? It's right there, so i'm going to leave this one alone and uh yeah and see this superheats ranging too see how it's coming down. That's that's normal for it to fluctuate, but all right, yeah, we're gon na give this one. A clean bill of health and uh wrap this up.

I can't stress this enough and i keep bringing it up and that technology is amazing, but we have to know how to do the work that the technology does for us. We have to understand how the technology is getting to. You know the results that it's giving us, because it's very easy, like i showed my ignorance in here right, i'm confused. I don't understand you know the exact protocols for profiling, multi-stage multi-circuit, whatever in measure quick, and so i am, you know tripping over myself a little bit now.

I think i've kind of figured it out and the confusion - and i love measure quick but the confusion is, is the wording and the phrasing that they're using maybe i'm incorrect, maybe they're incorrect. Maybe it's a mixture of both it's hard to say, but we have to understand how to interpolate data and know when we're being led down the wrong direction. I can't stress that enough. Okay, if we just simply hand a new technician, all this technology and all these probes - and they don't understand, what's going on something as simple as 15 to 16 degrees, sub cooling, now, 15 to 16 degrees, sub cooling on a typical air conditioner is usually too high, But if you understand that we're getting discharge pressure - and sometimes there can be 30 35 40 psi pressure, difference from the discharge pressure to the liquid pressure and understanding, if you don't have a discharge or a liquid pressure port using discharge pressure to gain sub coin is Going to give you a skewed number, and sometimes if you do the math looking at a pressure temperature chart, if you get 16 degrees subcoin that could be actually 10 degrees.

Sub cooling, if you were to get liquid pressure, so understanding that, because someone could be chasing a ghost trying to figure out, oh it's overcharged, taking refrigerant out and then all of a sudden. The capacity goes down and you know they go down a vicious loop. So understanding how to take a step back approach - and you know - know the basics you know know what's going on and how to interpolate bad data right, because it's very easy for us technicians to put the temperature probes on the wrong placement. What happens if you know you're trying to get super heat and you put it on the discharge line or you know who knows right? You could be led down a path that could be a problem.

Okay, i mentioned i'm working on a package unit and using my supply air temperature, and i put it right in the side of the unit. Now i said you know. For me, this is the best place, but if we were checking the heating system, that would be a horrible place to put our probe and we'd very likely melt, our probe okay, because it's literally a half an inch when i shove it in that side panel from The heat exchanger and that heat exchanger gets extremely hot right now, even for cooling, sometimes sticking it in the side of the unit can be a problem all right. If you're working on a train package unit, some of the old voyager units, the evaporator is right there and you're literally inches from the evaporator.

That's not a good thing! You want to be out of line of sight of the evaporator now in some situations. You know when you stick it in that side panel. You know, you've got a blower motor and different things. Now in a perfect world, you know we install the probes below the roof deck in the attic, but that's not always practical.

When you're doing package unit work. Okay, so sometimes we have to make some decisions and do some things that aren't a hundred percent correct. But we have to understand that there's gon na be ramifications because of those shortcuts and we have to know how to interpolate the data and you know make sure that everything's gon na be okay. So we really really need a thorough understanding of the refrigeration cycle and i can't stress enough if you're a new apprentice and you're just getting thrown to the wolves.

You know you just got out of school and they throw you in a van and they're. Sending you out to service calls they're doing you and themselves an injustice by not properly training you and giving you a proper apprenticeship. Okay, so i went through a few things in this unit. I saw extremely low superheat now on these york predator units, it's actually very common to find loose sensing bulbs, and you know i corrected that right.

I went ahead and went with a double strap, even though i thought it was overkill. I double strapped it. We eliminated that problem. Okay, it's also very easy experience helps with this, but you you know, i i set a rule of thumb.

Well, it's you know very common to find loose sensing bulbs on these york predator units. Now i don't want everybody out there to just assume it's a loose sensing bulb every single time that they see low superheat. You know because then you could just be in a tunnel and not paying attention to everything else, but keep that in consideration. You know and evaluate everything, so i saw extremely low superheat.

I corrected it by re-securing the sensing bulb and insulating it as best as possible. Sometimes you know the the unit's not designed the best that discharge line should not be that close to that suction line. That's a horrible placement of it and there's going to be ramifications, so i tried my best to insulate the discharge line again. There's not a cookie cutter approach to everything that we do.

We have to be able to adapt in the field. We have to be able to look at the the system and say: okay, this is the problem in a perfect world. This is what i want to do, but i can't do that so we have to make best with the tools and the equipment that we have and do our best to make it work. Okay, it's not always perfect.

It's not it's yeah, it's just not always perfect. Okay, but we try our best now. Another thing i wanted to address is using your senses. I can't stress enough when we are working on the rooftop.

Do not wear headphones, do not play loud music, because you need to be able to hear everything around you now. I understand when you have to have headphones for hearing protection because you're working in a motor room, you want to protect your body, but when you're on a rooftop, i stress to everybody, don't put headphones on. I was on that rooftop and i heard a condenser fan motor across the roof. I could hear a noise and i said i know that noise - that's not right and i walked over there and i was able to get another service call.

I generated more revenue for my company by simply being on the roof. I got more hours. Therefore, i made more time i didn't have to bounce around to five different service calls. I was able to stay on one service call for the day got my entire eight hours that day, including you know, calculating drive time that location's like an hour and a half away from my shop, so anyways, but i was able to spend an entire day solve All the problems there and now we don't have to go back okay, but again because i was on the roof working on one unit, i'm listening and then i'm going down and talking to management and saying hey.

We have two loose belts. I think it'd be very, very smart if you, let us check all the other units, so we can eliminate future service calls and we did. We went up there so we're using our mind we're keeping the manager's best interest at heart. The restaurant's best interest we're communicating with the manager we're doing our best as technicians, we're also trying to take care of ourselves.

It was a warm day. It was like 85 90 degrees, so we're hydrating we're going downstairs. We're taking breaks, we're, you know, making sure we're eating lunch and all that stuff, but it's all about the big picture. It really is, and i can't stress that enough.

Okay, i really appreciate you guys making it to the end of the video. If you haven't already, please check out my website hvacrvideos.com, we have merchandise available on there. These hats, these shirts. We have another shirt, design, sweaters beanies.

It's a great way to support the channel you'll, be helping keeping my wife busy because she comes in here and does all the merch packaging and ordering and delivering and all that stuff. So again, i really appreciate you there's a couple different other ways. You can support the channel. The easiest way is watch the videos from beginning to end without skipping through anything and then there's links in the show notes of this video for uh other ways to monetarily support the channel through patreon paypal, youtube channel memberships, different ways so check it out.

I really appreciate you all and we will catch you on the next one: okay.