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Hobart Bar Aid turning off randomly
Our Bar Aid turns off randomly. Not sure where to start with this problem. PCB looks flawless without any corrosion/water damage.
It also overfilled from time to time so today I replaced the pressure transmitter. I guessed that both would not fail at the same time so I first tried the right. Did not help, so i replaced the left. Not sure if this causes the machine to turn off (fill timeout)?
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17 Replies
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Bar aids are not sold here in the states, But what model is it?
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Seems like a Baraid 500 (but I’m with the machine at the moment, so I’m not sure). See PCB and front panel.
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Being I’ve never worked on one, but understand their principle operation, Have you checked the temp sensors. A lot of glassware cleaners have to have sanitizing temps to operate and will pause to wait for heat. You may have a heating element out.
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okwestern, I forgot to mention water pressure sensor. Like a common line and someone turns on a tap will trip it.
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I’ll measure the sensors and elements. I guess the sensors are 10k or 100k NTC? Or K-type?
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Appears the temp sensors are 10k NTC (pn: 775612-1). I immersed both in ice water (measured to 1’C degree) and boiling water. (10k NTC should read 26k at 1’C and 0.97k at 100’C). I measured both and they was almost exactly the same, 33-35k (-4 to -6’C) at 1’C and 1k at 100’C. My brand new 10k NTC read exactly 26k. Seems odd, both should fail at the same time. But would 5 to 6 degrees offset cause the machine to intermittently turn off? I would expect this if the value was way off, but not by 5-6 degrees? And since the machine operates around 60-80’C (not 1’C), the offset is much smaller, if any. I only had one new sensor so I replaced the sensor at the small closed tank at the bottom (not the open “bowl” like heater inside the machine). No improvement. I also double checked the detergent, rinse aid and water hardness settings.
I’m getting crazy with this machine.
Any tips?
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Does it have adequate water pressure through the whole cycle?
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It hasn’t turned off during a cycle so far, just between cycles, when it’s not in use (we only wash cutlery and plasticware in it, so it’s not in constant use). I suspected it entered a standby mode or similar after some time. But I can’t find anything about it in the manual. It’s been operating fine since it was new in 2015, and we have the same equipment on the same water line as always.
I measured the 3 elements on the closed water tank, and the 1 element in the inside open bowl, all read fine, 45-60 ohms, no short to ground.
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Got a schematic, I’m thinking high limit on the heaters, possible relay sticking? 🧐
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hi beef. Did you have the schematic for this? I would love to have it. Problem has reoccurred.
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Nice. Would you send it to me?
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