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Liebert crac dx unit compressor overload tripping issue

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1 Answer

Keeps triping on compessor overload

The start capacitor is going bad. Replace it before it ruins the motor in the compressor.

Oct 01, 2014 | Heating & Cooling

1 Answer

After cleaning frige and plugging it back up it blows air but not getting cold I can here what I think is the thermastat clicking on and off

You are most likely hearing the compressor overload device tripping and resetting as the compressor is probably not starting. remove the rear lower panel of the unit and verify your possible buzz/click is coming from the compressor. If this is the case you can replace the starting and overload device to see if this fixes the issue, if not your compressor may be in need of replacement. Pleazer Appliance...

Apr 18, 2014 | Amana Refrigerators

1 Answer

Sub Zero 650S 3 Shutting Down/Tripping


According to your information you gave you either have an extended circuit (electrical) or a short/weak connection in the unit. If you can get to the outlet for the unit, try another outlet (different circuit would be better) this would rule out the electrical issue, either the unit or the power supply to the unit could be the issue. If you can you might want to call a subzero tech to look at this. This units main power supply into the unit is located in front on the freezer compressor, if you have a dark or blackened molex connection you would have a short there. Try the relocation of power first and see were the issue can be isolated to supply or unit.

Good luck

I’m happy to help further over the phone at

Apr 01, 2014 | Sub-Zero Refrigerators

1 Answer

Have a Liebert thermostat model TM162AD that the water alarm keeps going off but the pan is dry that the switch is located in. Cannot disable without a password and the customer does not know the...

You've got this in a UPS section, but it sounds like it is a CRAC unit - with leak detection and a containment pan - or humidity option? Either way, when you say "water alarm" is it a water under floor alarm, Leak detection alarm or something else? I can't find the part number your provide on Liebert's website.

We use all types of Liebert equipment where I work. Speaking with Liebert tech support people was always easy for us.. no hassles or fees. Have a look here to see which area will help you the best.

To your question, the stat, sensor or cable could be bad. If you disconnect it from the terminals - it may clear.

Good luck!

Oct 30, 2013 | Computers & Internet

2 Answers

Sounds like overload protector issues. cuts in briefly and cuts out.

touch the compressor if its red hot its knackered sorry to say.... needs regas ..

Feb 25, 2011 | Danby Refrigerators

2 Answers

Trips thermal overload. power source ok. oil ok

Several things to check. Amp draw to be within number on plate, if amp draw not correct check capacitor, should be within 5% of rating on cap.. If amp draw about right and cap reads good suspect faulty breaker. If amp draw high and cap. good check for leak at in-tank check valve. With pressure in tank remove hose at check valve spray soapy water. If check valve good, suspect reed valves leaking. If reeds are leaking the compressor will take longer than normal to fill and the discharge tube/air will get very hot. It is recommended to note the amount of time it takes to fill tank when unit is new and compare this as unit wears. Length of time to fill is an indication of how well unit is working. A combination of leaky valves and leaking fittings as well as leaking checkvalve will cause motor to overheat.

Oct 03, 2010 | Hitachi EC89 4 Gallon Twin Stack Air...

1 Answer

Breaker breaks

This unit may have an internal overload mounted on top of the compressor. You would have to get to the
compressor to find out and it maybe faulty. That may
explain why the compressor comes on later on, this
overload protects the compressor from getting hot.

When you trip the breaker and then reset it again only to see it trip again almost sounds like a direct short or loose wire. It could also mean that your
capacitor needs to be replaced or that you need a hard start kit and the unit needs a good cleaning.

Try just operating the fan and see if it trips the breaker, if it does then either the blower motor is bad
or it is still the capacitor.

Jun 25, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Compressor attempts to run, trips overload

Do you have the facility to top up the oil level on the compressor

If so you may find that the low oil sensor is kicking in and trying to prevent you from running the machine dry.

Jun 15, 2009 | Hitachi EC12 Portable Electric 2hp Air...

1 Answer

York screw chiller R-22

hi! there;
there are several causes we can consider in tripping of unit on auxillary sensor.the sensor device was designed to cut off source at specific limit of time or load.the over load sensor device was equipted to the main source specially on cmpressor of chiller to protect of burning the motor.
common causes of tripping off unit
1.high current on supply can check this on one common line of compressor.using clamp ammeter.what ever reading you got when unit is running,compare this on rated current on manuals if high ampere was registered.ther is an overload supply the over load sensor will activate and cut off your unit.
a. source of overload is due to obstruction on refrigeration system,filter dryer are clogged,excessi9ve oil on high side.
b. themostat not cycles on,due to poor condensing fan, dirty condenser fin tube,or condeser insufficient cooling effect.
c. bearing,lubrication are not maintained usually on compressor on open type unit,

2. electrical wire and electronic control board short circuited.
a.sometime relay malfunction on cantactor w/c the supply souce intermittent either on one line supplying compressor,the compressor will suffer,it will just hum and trip off,

b.busted capacitor will trip off your unit,due to in the absence of starting motor.
this are common ways unit trip off, so regards and have a nice day,and one thing more don't forget to rate me, thank's

Apr 08, 2009 | Heating & Cooling

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