Hussmann Recent Questions, Troubleshooting Help & Support

http://www.jiaben.com/en/pro_show.asp?id=454

Assuming the compressor is sized correctly( and usually they are) There are a couple of fairly easy things to check.
1.) The compressor unit.
Are the fan(or fans ) operating. Some units have two condenser fans and will operate with only one until the temperature gets too high for it to keep up.
Is the coil clean. A dirty coil can cause unit to fail too keep up in high temperatures.
2.) The evaporator unit .
Same as condenser unit . Are the fans all working
Are the coils clean.
3.) Defrost Timer. Is the time set correctly .
Is the unit defrosting during low usage time periods.

Hope this helps

Bob

Did you install the doors or a contractor? Sounds like the doors are not fitting the opening properly 

Freezers usually have a super heat of 6-8 degrees and as it approaches the set temperature, it can be as low as 4 degrees. you will have to 'babysit' this and adjust as you go but it has to be done in extremely small amounts. the crankcase pressure regulator basically keeps the compressor from being overloaded from high pressure like from after a defrost or the door being left open.

There HAVE to be a thermostat to cycle unit .Is there a sight glass on the liquid line .If there is normally you charge it up until you see no more bubbles in the sight glass.
There is never a constant pressure reading because pressure depend on outside temperature .
Thermostat for freezer will not look like regular thermostat.
I will be in the evaporator section

Hallo Please send me a picture of the compressor and one of the sticker on the compressor and i'll give you the specifications and compatible suggestions. Regards

hussmann deli case, replacing evaporator.

www.hussmann.com/en/Products/Technical-Information

As long as you can find a replacement compressor you can put one in it