Question about Traulsen 7 cu. ft. / 198 liter Commercial Freezer ULT27

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Freezer compresser short cycling pressures at 45 150 b4 shuting down and re trying, what should normal press, be? if i recover refrigerant the compressor runs longer and brings on e vap fans

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  • Traulsen Master
  • 3,361 Answers

You have a restriction in the system or a overcharge.
Recover the system.
Replace the filter/drier.
Pull a deep vacuum.
Recharge according to the nameplate charge.

Posted on Mar 11, 2009

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Posted on Jan 02, 2017

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2 Answers

What happens if you would add a charge to a running system that has a low charge on a 404a system and you charge thru the suction as a vapor. I had a memory lapse and have charged 410 systems as a liquid...


as long as you recovered the charge, pulled a vacuum, changed the filter/dryer, and added the correct amount of refrigerant as a liquid, you should be good to go.

Jun 28, 2017 | Hoshizaki Freezer Commercial Ice Machines...

1 Answer

Short cycle in freeze mode


a short cycle usually means it is cutting out on high or low pressure.If its low pressure add gas.If its high pressure make sure condenser coils are clean.amp check compressor if its real low its low pressure if its real high either high pressure or bad cap or bad compressor windings.

Apr 18, 2012 | Freezers

2 Answers

Working on a t49 freezer it wont go below 30 , change compressor couple months a go worked fine. Now i change dry and regas with 22oz 404 and wont go down , my high side is 200 my low side is 18 . clean...


Sounds like a restriction to me.
Recover the charge.
Pressurize the system with 350 pounds of nitrogen pressure through the high side.
Leave it pressurized for 15 minutes.
Release the pressure through the low side.
Replace the filter drier again.
Pull a 2 hour vacuum on high and low side.
Recharge liquid refrigerant on the high side.
Let the system sit idle for 30 minutes before starting.
Check the evaporator fan motor as well as the coils. Use a good coil cleaner on the e-coil.

Jul 24, 2010 | Freezers

1 Answer

My Taylor 745-27 starts hopper comp. comes on, blower starts,beatersrun,fan shuts down beaters stop compressers sun for a shoet time then shut down, the beeps and starts the process over again Any...


could be a dirty condenser. Hi pressure safety is preventing a dangerous condtion by shutting it down. When pressure drops, unit cycles back on. Check it out.

Jan 12, 2010 | Freezers

1 Answer

Freezer is warm, not freezing at all, fans run


If the fans your talking about are in the refrigeration section, then the unit is not in defrost. The interior fans shut off during the defrost cycle.
There is a condenser fan motor in the machine section by the compressor. If it fails, the problem you described can occur.
If that fan motor is still, and the compressor is cool to the touch, then no power is getting to the refrigeration section.
Could be a bad thermostat, or the unit has tripped off on the high pressure safety switch. The high pressure switch can be one of 2 styles. Auto reset, which means it will try to restart the compressor when the pressures become normal. The other has a lock out feature that requires it be reset manually. If it goes out on the high pressure switch, once reset, check the condenser fan motor to make sure it is running and/or excessive dirt in the condenser, which must be blown out.
Other causes can be a total loss of refrigerant, or a compressor that won't run.
Short of a broken wire all items listed except for a dirty condensor and reset of the high pressure switch, require a decent knowledge of electrical, Knowledge in the use of a VOM meter and amp-probe, as well as a set of refrigeration gauges.

Oct 30, 2009 | Turbo Air 49 cu. ft. / 1388 liter...

1 Answer

Not recovering


Make sure the fan in the freezer is running circulating the air.
How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php

If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

Sep 03, 2009 | Freezers

1 Answer

Freezer side compresser short cycling sounds like compresser is laboring pressures are at 45.ls 150/hs before shutting down and re trying


Assuming you have checked that the defrost system and fans are working correctly. I suspect that you have a blockage in the refrigeration system. You need to flush and vacuum and replace the reciever drier.

Mar 11, 2009 | Freezers

1 Answer

Ice cube cycle time very high


i suspect a defective liquid line or pump down seleonid coil. just make sure you hear the "click" when it starts up if not the selenoid coils could be defective. also verify that the condenser fan is running,because if not you are short-cycling on high head pressure. please contact if you need any additional info

Jun 11, 2008 | Hoshizaki Commercial Freezer KM-500MAH

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