This video is brought to you by spore'ln quality, integrity and tradition. Today's service call is an interesting one. I got a complaint yesterday that the dining room was hot, but the manager again, I already know, but I'm gon na - try to describe this to you guys. The manager says it's not hot, though it's nice in the dining room, but it's sticky.

So the complain essentially was that it was humid in the dining room, but he described it as hot. He didn't really have the explanation as to what was going on. Well yesterday, it was raining. We've had rain for the last like three days.

I already have a hunch as to what was going on, and so what happened is. Is they have internet thermostats here? So I was able to log on to their system with him on the phone and every single zone said anywhere from 72 to 74 degrees. So it was nice throughout the dining room, dry bulb temperature, but the humidity in the building was too high. Okay, maybe you can already guess what was going on.

Also, I noticed that, according to the internet, thermostats, none of the air conditioners were had mechanical cooling running. So they all had a call for cooling, but the compressors were not running, and that's because my hunch is that the economizers were open. These units all have plenty while t8 economizers, and my hunch is - is that there I got ta do a screw on that one. There dry bulb economizers, I'm pretty sure they are because we really don't.

We get rain a couple times a year. We don't really have humidity here in Southern California, so my hunch is is that the outdoor air sensors we're sensing cool air filters to the filters on the blog go by go for NorCal Dave but yeah. My my assumption is that the economizer was was opening the damper all the way. So what I did was I went to every AC and every ACS filters are plugged.

Some of them are standard. Some of them are regular, but they're they're, dirty as heck so and this customer stop. Preventive maintenance is for a bit they'll go back with them, but they just stop them for a bit. So before we can go any further, I got to change the filters because we have to have these units in optimal condition for them to operate properly.

There's no sense of me playing with the economizers. If that's what's going on all so, I'm just kind of doing a visual walking around it's like opening Pandora's box, as I'm going through this so this unit, this panel is off and there's oil all over that discharge line and the suction line. So that's not good. I want to dig into that and then again Pandora's box, I'm over here.

You know and I need to check the belts on the exhaust fans, so this is the first one that I checked again. All of this is going to affect my building balance, which is going to affect the way that the ACS operate, and all of this has to be an optimal condition before I start fixing economizer issues, but look at that belt, holy moley, but lucky. This thing is even running, but then it's not just that come over here. This exhaust fan was running turn it off and I turned it off and then look when I turned it back on.

It won't start it's sitting there trying to start and it blows the motor starter good gosh. So I got to stop what I'm doing with the ACS because they can't operate without an exhaust fan. I need to get this motor changed out. Nice huh, once I get this motor changed out, then I can continue I'll go ahead and pick up the filters when I go to get the motor just like one thing after another here, so all right.

Well, this is how it works when you're dealing with restaurants, sometimes so what I did all right. What I did was, I went and grabbed my meter and I checked voltage. I have three-phase power coming in. I can't really get this on camera and then I put my meter on line one in line two and I only had 93 volts.

So I believe that my three-phase switch is bad. So what I'm gon na do is I disconnected power at the motor starter? So power is off, I verified, we have no voltage and I'm gon na temporarily pull this switch out and bypass it and see. If we can get this guy started up, and maybe it's just a bad three-phase switch we'll find out and then we'll test it once we get it out, went ahead and pulled the switch out, they did a wire for wire. So I didn't reverse the rotation and we're gon na fire this guy back up, hopefully it'll start up motor starters right here.

I'm going to go ahead and hit reset started right up. Yeah we're gon na watch it for a little bit. I'd love to there's. There's a lot of things about this unit.

First off this is a green heck fan who love the green heck. Exhaust fans are Acuras, whichever one their amazing products. They do a really good job, but they used to make these low profile fans, meaning that the stat from here to here is a lot shorter. That is a one and a half horsepower motor again, just from experience, it's going to be very difficult right now to get that exact one and a half horsepower motor.

I believe it's an old GE motor and it's gon na be hard to get that small motor. As far as the height goes, so the new motor is going to be too tall again, which is knowing from experience and I'm gon na run into problem. So if I don't have to change that motor I'd rather change this span when it comes time because the fan itself is in really bad shape too, but I know they're not going to do that right now, so I'm going to watch it for a little bit. Alright, what we're gon na do is we're gon na test.

This three-phase switch okay line, one the leg is closed and we have good contact on the switch line. Two is closed and we have good contact on the switch line. Three is open so line. Three is not making contact and it's weird too, because if I move the switch around to make contact no open that was closed and this is line one line.

One is closed, but look at my resistance values. Yeah we've got a bad switch. So if we were testing voltage, we would have voltage drop across this switch on line one, and then we would see voltage on line three and then line two. We would see no voltage if we were testing across the switch, because this is a three-phase switch and what's happened is this contact is bad line three and then line one is intermittently making contact on line.

Two is good, so this is operational for now. They'll be happy, they got a fan, I'm going to test the current make sure everything's good with that 4.4 amps, and I'm going to see what this guy's rated for over here. It was hard to get in there. I had to get them here and there, but it's rated for 4.8 amps, so we're doing fine it's running now, so customer will be happy and I'm gon na go ahead and change all these belts to or get them all cleaned up.

I went around to every exhaust fan found out which one's need belts and which ones need spares, which ac's need filters, I'm taking a list of everything and then we're gon na run to the supply house. At this point in time, everything is up and running that kitchen a/c is not up and running. I should say that's the one that I found the panel sitting next to the unit. It seems like the main breaker has tripped, because there's no three-phase power at the disconnect switch, so I went ahead and shut down the disconnect, switch I'll, go downstairs and reset the power and then we'll go from there.

I have a feeling that something just got wet. If you look right here with the panel missing, it's possible that these filled up with water or got wet and caused an issue - I don't know you know we'll find out more a little bit. I'm actually not here for that. But if it's a simple fix and I'll take care of it, so yeah, that's where we're at so far and I went ahead and just for the next guy, the markings of all the belt sizes have been disappeared.

So I wrote them in paint marker and then I take my sharpie and I write spare or in s4 no spare so that way, if another tech is coming by, the reason why I do the sharpie is because that'll fade away. This won't the belt size isn't going to change, but the sharpie the spare knows, but I don't want that to be permanent, but it just helps me for when I go, do my filter count so like, for instance, I mean my belt count, for instance this one. I know that there's no spare, so you know I'm I I typically for these exhaust fans and for the ACS. If I have an exhaust like let's say three of those exhaust fans take the same belt, I'm probably only gon na have two spares.

I'm not gon na put three spares same thing with the ACS. I'm not gon na put a spare in every AC if they have multiple ACS. So if you have three ACS that have the same belt, I might new one or two spares and then mark it. You know so that way again the and it changes every single time depending on your customer, so this particular customer.

Normally when we do the preventative maintenance part of our contract, the belts are our costs. We give those to them, basically as part of preventive maintenance cost. So for me to put spares in the unit - that's an extra cost for me, so I definitely want to do spares. But I'm not going to go crazy with spares, because that's extra money that I'm spending right, so I'm only gon na - do what's necessary to get me by.

So you know five three ACS I might do one or two depending on you know how often they do the preventative maintenance and then that way, when we're out here, we just swap the belt and call it a day and we don't have to go to a Supply house, but in my case today we need so much stuff, but this customer again, I normally did preventative maintenance this year, but they're not doing them at this time. They cancel them for now, but they'll start them again. So god, all my belts figured out next thing is I'm walking around and very common on these Honeywell Jade economizers is bad sensors. So this right here is I'm gon na.

Take you guys in there might be kind of loud, but it's actually giving me an air of a bad outdoor air sensor. It says error, so one would assume it's probably bad. So I'm just going around looking at those and finding which ACS have those. So so far I have three outdoor air sensor errors and then I have one dot unit right there.

It says the mixed air temperature sensor is 47 degrees, but the cooling has not been running since I got up here so there's no way it's 47 degrees. So on the ones that are working again, just to verify what I did was. I went in through the settings and I looked at the outdoor air sensor and the mixed air sensor and they should be identical temperatures, because I have no call for cooling on any of these ACS right now and we're pulling outside air for the economizers. So our mixed air and our outdoor air should be pretty much identical, and on that one I noticed the outdoor air is like sixty something degrees and the mixed air is like forty something.

So we've got a sensor more than likely going bad that or a bad connector. So when I go to the supply house I'll make sure I grab some extra sensors, so I have them again. I still haven't figured out exactly what the service call was, but the fact that we had dirty filters. You know all that we got to get that address and you know before we start diving too deep into stuff when I'm doing a filter change.

You know I like to pull the old filters out, leave them up there and then that way again. This is something silly. It sounds silly, but that way I don't have to think about it. I just bring the other filters up here and I'll usually set them on top of all the ACS and then go around changing them once I have the old filter sitting next to the new filters, it's just one of those things so that way, I'm not like Scrounging, sometimes it's written on the panel.

Sometimes it's not what filters do I need you know again. I guess that's probably just my OCD kicking in I'm gon na do the same thing. With the belts too. I got a whole stack of belt, so I'm gon na go put it next to each item so that way I can just swap them out real fast all right.

So I swapped out this mixed air sensor, but when I'm putting the connector back on, I notice it's not making good connection it's loose and that can cause some issues. So when you replace these, they come with a new chingus. You can put on there. I'm gon na go ahead and take that plug off and hardwire these guys into that, and then we won't have any question whether or not it's making good connection anymore.

So what I notice is, after I got the mixed air temperature sensor set. I came over here and I realized - and I'm gon na put you in here right now, but I realized this damper is not actuated, so we're gon na go through a test feature where I open the damper manually but nothing's happening, and I'm gon na show you Guys we're not opening at all, so this one is possible that when it went to economize it didn't even actuate it all and it just sat there doing nothing. Depending on how its setup I got to make sure that it should. I believe it should be set up for two-stage cooling with the economizer so that way, if the outdoor air doesn't satisfy within so much time, it turns on the compressor or the mechanical cooling wallets economizing, because the way that it's working right now being that the actuators Not moving it's possible that you know they just weren't doing anything, but then again you know, as I'm saying that that doesn't make sense, because they're building temperature was 72 degrees.

So you know I love to see, but yeah we've got an actuator problem or something so we are running our tests right now. My actuator has voltage and it's not moving so yeah there's something going on with that. Actuator I'm gon na pull it apart and see. If maybe a wire came loose or if it's a bad actuator, it doesn't seem like any wires cable.

Is there all there you're all snug, no electrical shorts, interesting everything's, still connected right. I'm gon na put you guys in here this one's also reading outdoor air sensor, error and my sensors down here. So we're gon na swap that guy out connections, nice and tight, but we'll still get rid of that connector looks like we got some room. So what did that guy swapped out? You know something that I often do and I guess I need to do a better job because I'm doing service and I'm not really thinking about making the videos so sometimes I'll, skip steps and I'll show you guys what I'm seeing or what I'm testing for it.

So I am actually testing since to see if it failed. So this is the new one. It's been sitting outside. It reads: 13 km list, the old one like imminently won't connect everyone really like 42km yeah hi a minute there's not but yeah.

We are testing these to make sure they are bad, because that sensor was bad. We were locking our cooling, but that's not it either. So now, all of a sudden, my cooling zon that's running, but I'm gon na put you in here again now we're getting a freeze lock out because the mixed air temperature sensor saying 29 degrees. So it looks like we got a bad mixed air sensor too.

So alright, so now now we're actually reading to correct temps and the mixed air temps gon na be lower, because the cooling is on right now and my outside air damper should be opening up. Also, we should be actuated to give a minimum outside air I'll pull. This filter off yeah and we're actually actuated now so before what was going on with this one was the economizer was sensing. It has a low, lock setting, so if it gets below, I think it was set at 29 degrees or 34 degrees, or something like that.

Whatever the low lock setting is it locks out the outside air damper, so you don't bring in icy cold air, and so because the mixed air temperature sensor was bad. It was shutting down the economizer and then, on top of that, the outside air sensor was bad. So that was shutting down the cooling so now this unit has cooling, I'm not going to go through the whole gauge setup right now, just because I'm doing the economizers we're just checking them out, get them all running right now I replaced two economizer sensors are placed One economizer sensor: I replaced two economizer sensors but then found out there's a problem with the actuator. I went ahead to every quantum Iser and set the the economizing setpoint at 60 degrees.

So that way, it's not trying to bypass at 70 degrees changed all the AC filters checked. And/Or change to whatever belts were necessary. Okay, I got a list of pulleys and different things that are bad. While I was here found that I shut the exhaust fan off to check the belt found that it wasn't working found a bad switch, bypassed that temporarily I'll get a new switch and will come back out, checked, and/or, changed and adjusted and left spares and all the Exhaust fans and last thing it's kind of like I did a p.m.

- but I was here just for a simple service call last thing is - is uh, I'm hoping this is just a capacitor, because I noticed this one condition family and I spun it with a. I put something in there and the motors it's like it's trying, locked, rotor, amps or something that's not spinning, so the capacitor looks like it's covered in oil. I'm gon na swap the capacitor out and hope that that solves that problem again this started as a simple hey. It's a little bit warm in my dining room service call and it turned into all of this.

But again big picture diagnosis right. I know my restaurant. I know the way it operates and we need this thing. You know III went through everything thoroughly now, there's certainly more.

I could do I could put gauges on every system. I could fire up the heat on every system, but again there's a point at where is it taking it too far? Okay, I saw cooling. I saw the supply air temps when I have mechanical cooling on on every one of these ACS drop below 50 degrees. Again, that's not the proper way to check cooling cycle, but when I'm going through this - and you know not really there to do all that stuff - I'm just gon na just kind of do it real quick.

You know, but again I'm trying to be thorough in certain areas all right. So hopefully you guys get the big picture here. I'm gon na start wrapping things up and I'm gon na jump on this condenser fan motor and hope that it has just a bad capacitor. You know I could easily just walk away from this and say you know what they'll call me when it becomes a problem.

My luck, it's gon na, be when I'm on call. So you know I'm gon na try to take care of it now. So that way, I don't have to deal with it in the evening or something like that, because that will turn into an emergency service call in the middle of the night or in the evening or whatever got ta. Be careful because the ice machine condensers are tied into this, so I can't just shut off the main without going down and shutting off the ice machines, but do that capacitor that doesn't look good, so we're gon na pull that a hose, clamp off and check it Out nope doesn't work still it's something wrong in the motor and I'll check voltage, but I know it has voltage because they all run together.

She's done. I was a little bit incorrect, even though they have the same contactors, they're separately fused and we had a blown fuse and I went ahead and replaced the fuse and it blew again so we're gon na have to change that motor. I don't think I'm gon na do it today, because I think we're okay, but I'll probably come back tomorrow and change it. Okay, you know the the can start out to be the simplest of calls and then turn into you know this cluster F of everything right.

They called me out about what I thought to be a humid, sticky, dining room because they said they had. No, you know a hot dining room when it was raining outside. Basically - and you know once I started going through everything - I realized units all had plugged up filters, the belts were horrible, the we had an exhaust fan that wasn't working or that I you know found to be not working once I shut it off and then it Just you know Pandora's Box, just open it and fold it everywhere. Okay, but you know it can be frustrating you know when you go out to do that stuff, but you just take it one thing at a time and I try not to let it overwhelm me.

You know I was there for an air conditioning call, but then I know it's my restaurant, so I know how it operates and that exhaust fan being down they weren't gon na run correctly and it mind you. It was running when I got there, but when I shut it off to check the Bell, it wouldn't turn back on. So you know the bad switch was intermittently making contact. You know these things can be frustrating especially.

You know when the customer stopped. The preventive maintenance is to try to save money for the rest of the year, but you know what that's life, that's, how it works and it keeps us busy right. So you know this gave me a day's worth of work that I you know could have done. You know not had basically okay, so it's frustrating, but I'm thankful, because this is what keeps us moving.

You know and I still try to keep my cool. I you know when I found the exhaust fan stopped and jumped on the fan and then started going through everything. Once I got that fixed, then I moved back to what I was doing. You know, and then it was still one thing after another, the kitchen a/c, the breaker was tripped.

The panel was off, I went through everything didn't find anything wrong, turned it back on. It's been running, you know, but then went through each individual air conditioner found multiple economizer sensors that were bad. It was just like you know, kept kept going and then, when I thought I was all done, we got a bad condenser fan motor on the refrigeration rack, but you know it is just how it works right. You just kind of unfolds that way, but you know what we just like.

I said we just kept: our cool went through it all. I really appreciate you guys taking the time to watch these videos. Do me a favor leave me some feedback down in the comments. Send me an email to HVAC our videos in gmail.com.

Let me know how you guys think: okay, what you guys think about this and what I did and how all worked out give me your thoughts. I really appreciate it. Keep in mind live streams Monday evening 5:00 p.m. Pacific time work permitting.

If I get off work in time, I'll definitely do the live streams yeah. I really appreciate it and we will see you guys on the next one: okay.