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Old 08-13-2012, 02:11 AM   #1
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Default Need help with refrideration unit

WEll long story short, we bought a flower cooler, that's gets cold for a while, then won't cool down. The compressor will run but nothing happens. So today we turned it on after being turned off for 4 weeks, after 3 hours this is what we found,

I know it shouldn't be frozen over like that but what is it? And does anyone know of an easy way to keep it from freezing over (I.e. putting a small fan in there to circulate air)

As all thanks for all the knowledge and help





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Old 08-13-2012, 02:13 AM   #2
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Needs recharged with freon.



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Old 08-13-2012, 02:14 AM   #3
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It may be low on refrigerant charge. what kind does it take? If it is 134a, you can do it easily yourself.

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Old 08-13-2012, 04:42 AM   #4
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It was checked for freon, and the repair man said it was good

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Old 08-13-2012, 11:25 PM   #5
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A couple more pics and a make & model number might help. Does the evaporator already have a fan that isn't working perhaps? Did the repair guy go through the entire unit and check everything?

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Old 08-13-2012, 11:37 PM   #6
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Make and model are unknown, we looked the over the whole unit and found no marking of a manufacturer. These are pics of it today. There is what looks like (closest comparison I know of) a car radiator with a fan that does run, it is behind and to the left of the frozen part in the pictures it you can't see it. The box on the right of the piece that is freezing over has a lot of condensation on it.





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Old 08-13-2012, 11:42 PM   #7
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If you have correct air flow and clean coils low refrigerant is the issue. How did the repair man diagnose correct refrigant level?

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Old 08-13-2012, 11:54 PM   #8
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He was more confused by the whole thing, but he tested to make sure there were no air bubbles. How do you test to see what kind of coolant it is, the problem is since it is a commercial unit in a residential home that has no manufacture markings it's hard to find repairmen to come out and work on it

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Old 08-14-2012, 03:43 AM   #9
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That may be a TXV valve under the ice, this valve malfunction could cause your problem even with a correct charge. How did he check the charge if he didn't even know what type of refrigerant is in the system there are several choices and each one has different temperature/pressure. I think your repair man may not have experience with refrigerated equipment he may only work on A/C units. I would call a service that works on this type of equipment.....IMHO

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Old 08-14-2012, 02:29 PM   #10
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That is the TXV that's frosted over. The car radiator looking thing is the condenser and its fan should run when the compressor does. Inside the box where the frosted line enters is the evaporator and I would expect there to be a fan inside there somewhere. That should be checked to see that it's running. There may be a label on the compressor that tells which refrigerant it uses or at least it could be looked up by the compressor number. If the tech was checking pressures, this is something he should have known to see if his observations were valid.

Floral cases are designed to maintain higher humidity levels than normal beverage coolers and may use oversized, low-speed evaporator fans which are baffled so the cooled air velocity is much lower.

Another thing to check is to see if the control is shutting off the compressor when the desired setpoint is reached. There are many things the refrigeration tech should have checked if he spent much time with this unit which may be beyond the scope of discussion here......



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