So I've got a service point here on a hoshizaki ice machine they're, saying that it's not working at all haven't done anything to it yet, except for turn the switch from ice to off. I did see little toggle, it's a wash mode and the pumps not coming on there's something going on there, so we're gon na go through it right now, so this is gon na be kind of a hard one. What I actually found was, I could see that the customer was saying you're trying to fix it themselves, because when we got here, this valve was in the open position needs to be in the closed. So I closed it and then nothing happened.

So then, I went to this fuse right here and then tested the fuse and the fuse was good. But what I noticed was it looked like they pulled this out without turning it and they the little tabs that are on here, the suet there we're not bent in the right position. They were like flat. So when I tried to push it back into here, it wouldn't grab and it wouldn't stay closed.

It's like right there so, but I so now the machine is running, but I still haven't found out why it stopped working. So we're gon na have to watch some cycles and see what happens. But now I turned it on and it's filling with water. And then I turned it to the wash mode and the water pump turned on.

So that's a good sign. So now we're just gon na watch a cycle and see what happens so I've gauged up and what I'm doing is I'm waiting for the water pump to turn on it's in a harvest cycle right now, as soon as the water pump turns on we're going to Start a timer time, the hi cycle and at the five-minute mark, we're gon na write down the pressure readings because Hoshizaki wants you to record the pressures, so it just did it right now. Water pump is turned on we're gon na hit start, and once I hit five minutes, we're gon na verify the pressures to the ocean architects textbook, let's see if they're accurate, so we were at the five-minute mark and we're running 390 head pressure and 63 back pressure. We're a hundred and five degrees.

So if you go over to the right of the chart, it says we should be running 309 and 55 dot. We have about 85 degree and water coming into the building right now, so things kind of looking like it run. It's a high head pressure, so why don't we take a trip up onto the roof and see what the condenser looks like the condenser doesn't look too bad, but we're gon na give it a wash just because it's so hot out here, condenser fan motors are both Running but I can't see light from here through the condenser, so we're gon na turn this guy off and give it a good wash see what that does to the head pressure. Fire doesn't show up on camera very well, but you can see through the condenser.

Now a little bit easier see light in different ways. So yeah I just give it a nice little ranch will rinse a little bit more okay. This is the second time around after I clean the condenser and those are much better pressures so 59 over to 96, and if we go to the bottom right hand corner for a hundred degrees, let's see 309 and 55 is what we should be running. So that's more like it, so my assumption is: I'm gon na watch.

This thing make a batch of ice and cycle or time a cycle, but I have a feeling that this thing went off and I had pressure and then they came over here to start playing with it and disassembled that fuse assembly and turned that water valve off And then once they broke the fuse assembly, it wouldn't work anymore because there's no audible safety alerts on the machine right now, so yeah we're just gon na watch a cycle. So I'm waiting for the ice machine to make ice and what I'm doing I've explained it in other videos. As I'm timing, the cycle what's gon na happen is I started it when the water pump turned on after the last harvest. That's the start of the free cycle and then I'm going to hit the laughs button when it goes into the defrost or harvest and then when it's all done I'll hit the stop button and what that'll do is that'll.

Tell me exactly how long the total cycle, including graze and harvest, was, and then also when I get the laughs button when I showed myself how long the harvest cycle so that way, I can get a full, a big picture as to how this machine operates. Then I'll be able to compare those to the run timers in the tech spec book and then also I've got pans inside the machine to catch the ice. So we can do a production check, of which I'll show you guys how to do in a minute. This way, we're covering all our bases to make sure this ice machine is working properly, while I'm waiting for the machine to make you guys ever see this on a person.

The insulation has failed on these lines and we need the reinsulate we'll bring that up to the customer to do that. So that way we can maybe get a little more life out of this compressor, so we just went into a harvest and when you wan na do a harvest, I get the Lap button. So now we have the recorded freeze time, which is 36 minutes now capturing all the ice and then we're gon na weigh that and we're gon na add up the freeze time and the hardest time to get our cycle. So after the freeze cycle.

As soon as the harvest cycles done, I hit lap one more time: okay and then now we have a total cycle time of 40 minutes. We have a freeze time of 36 minutes, we call it 37 and then we have a harvest time of 3 minutes. Okay, so we're gon na compare those to our book. We're gon na be high because we're running above 100 degree ambient right now, it's probably about 110 by now.

So the book on the second column, far right side says a 35 minute freeze time and an approximately 2.4 minute harvest time. So we're actually running a little bit over that. But, like I said it's to be expected, it's not long enough that it's going off on a safety limit. So now what I did was I I captured all the ice, we're going to combine them into a pan, we're going to weigh it and then we're going to do a performance, production, calculator, medicine on my scale, 31 pounds because there's a couple ice, cubes left in There so we'll call it a 31 pound and then we got to subtract the weight of that container.

Okay. So here's what we got. I weighed 31 pounds in the bucket that I collected the ice in the bucket weighed 2 pounds, so that meant that my ice production was 29 pounds you take 1440, which is how many minutes there is in a day. You divide that by the cycle time, and that tells you that you get 36 cycles per day.

Then you take 36 cycles per day and you multiply it by your batch weight of 29 pounds equals a thousand forty-four pounds per day of ice and then now we're going to compare that understand. It will not always equal this number exactly what you wanted to be relatively closed, so we have 90-degree water temperature and we're over a hundred degrees outside, so our production should be at or close to a thousand seventy-five pounds and we're producing a thousand forty-four pounds. That's right all the money. I have no problem with that now remember because it's over a hundred and ten degrees outside these numbers are going to be a little skewed and you're gon na go lower because that's off their scale, but our pressures are relatively close to what they say right here.

Our cycle times are relatively close, and our production test is relatively close to this machine is doing everything it can. Okay, so to recap, we had a service call on an ice machine, not working when I arrived. What I found was that the machine was not on at all. It was a little bit warm inside kind of like maybe there was a crankcase heater or something like that energized, but other than that nothing.

I went ahead and flipped it into the wash position. The the power switch and the water pump didn't come on, so I started to investigate found a couple things. The first thing I found was there's a cleaning valve on the water system and it's a bypass valve and the machine will not run when the bypass valve is in the wrong position. So I went ahead and corrected that the machine still didn't run.

Then I went ahead and got my meter out and I tested the bin thermostat, the Ben thermostat tested good. So the next thing I tested was the fuse, and I found that the fuse, while the fuse was good, the fuse wasn't making contact and what had happened was when the machine went down. The manager got up in there and tried to fix it himself, which is okay. He turned the cleaning valve that didn't fix the machine and then he saw a fuse, so he pulled on the fuse and he actually broke the the tabs on the fuse holder.

So while the fuse was good, the fuse wouldn't engage, so I was actually able to bend the tabs back on the fuse holder. Get the fuse to engage and the machine came on so then put my service gauges on it and found that the unit had a really high head pressure, went up onto the roof found that the condenser was dirty. We went ahead and cleaned the condenser and actually a citize. The condenser then went back downstairs and watched the Machine operate.

The machine went through all the operations. Everything was looking great. I timed the cycle. It was all within reason of what the cycle should have been.

According to the Hoshizaki tech, specs book also went ahead and did a production test test on the machine and found that the production was also within reason of the Hoshizaki tech specs book. So my assumption is, this is a hard one, because I wasn't there when it happened and the manager started playing with the machine okay. But my assumption was was that the machine went off on high head pressure, they said a that they said it went down. Was the hottest day so far this last week, so my assumption was was that the machine went off on high head pressure and the manager got up into the machine to try to troubleshoot it and found that you know, then he started playing with everything in the Machine went down had he left it alone, the machine would have been going off on a, I believe.

It's a single beep high pressure limit and I would have walked up and heard that beep and I would have known hey it's a high-pressure issue but because he started investigating you know the Hoshizaki x' don't store the error codes in their memory. So they're, just you know when it happens, it happens. So if they go and reset it or correct the high-pressure issue, then I wouldn't have known so anyways went ahead and got the machine back up and running and, like I said, the production was great and everything was cool. I think it's very important that you guys pay attention to that production test, because that will get you out of a bind if you have a manager that keeps saying.

Oh this machine's not working. Oh this machine's, not working. You know if you can't find anything wrong with it. Do a production test on the machine make sure you do the production test on the hottest time of the day, if you can, because that's when the production is gon na, be real, and for me it's about a hundred and ten degrees right now.

So this is the hottest part of their day. I did a production test on it and I found that the machine was making about a thousand pounds of ice in a 24 hour period and it's a 1,300 pound machine and that's to be expected when it's 110 degrees outside. In fact, the tech spec book says that it will make, I think, 1,100 pounds at a hundred degrees, so for it to be making a thousand and some change at a hundred and ten, that's pretty damn good other than that. I found a few other little things.

There's some screws missing from a little baffle that holds the ice inside the bin and then also there is a the cube guide, the tray that the ice cubes hit and slide down into the band the cube guides got some broken tabs on it. If you don't know, when those cube guides go bad, those little tabs, they can get stuck in the water delivery system. They can also make your pump fail, so we're gon na go ahead and order them a new cube guide and that's pretty much it.