i've replaced the start relay and overload, continuity tested the compressor, plugged in to different electric circuit, jumpered past the thermostat, the condenser coils look clean, the compressor is not hot to the touch, it does start and run for a couple of seconds before the overload trips out, its a jenn-air side by side about 10 years old have Makita MAC5200, with 0 air pressure the compressor will run up to approx 40psi then blow the current overload switch on the compressor. 0 Vote Up Vote Down. The sensing device, of a bimetal strip made of two metals bonded together, expands in overload conditions to eventually trip a mechanical device. AC compressor thermal overload is a common cause of malfunction, and typically happens on the hottest (or coldest) days of the year, when your system is working overtime. The overload protector is a small piece that provides a valuable service for any appliance that uses a compressor, such as a refrigerator or air conditioner.

This is why when a compressor is locked it is much more likely to shut off on thermal overload than it is to trip a breaker even though it will draw far higher amps than the breaker rating on startup. Old Compressor: If you have been using the same AC for over 15 years, there is a high possibility of the parts wearing out and the compressor not being able to do its job properly and get overheated while trying to work for long. Here is a typical electrical diagram of an industrial air compressor. my refrigerator overload keeps tripping out. husky air compressor keeps tripping the reset button.

When we start the GA-45 Atlas cop co air compressor, it is getting tripping with indication of Motor overload, NC and not normal.

Also the overload relay itself could fail. Low Refrigerant: At times, low refrigerant charge may cause extensive working of the unit, resulting in overheating of compressor. what is … The outside coil is dirty or folded over so that the system has trouble rejecting heat, this causes the compressor to have to work harder and hence get warmer. There are two usual suspects.

The Compressor When people hear the refrigerator working, what they are hearing is the motor powering the compressor. Questions & Answers › Air compressor tripping on overload relay.
If a compressor is in thermal overload, wait at least 24 hours before diagnosing the system further, to give the compressor ample time to cool down.

Cas Staff asked 5 years ago. 1.

As we have seen in the picture above, the overload relay ‘hangs’ (literally) under the main contactor. The compressor … ... My new compressor was tripping the breaker on kick-in pressure.


BEEBE Heating and Air Conditioning, Inc. 9104 Cody St. Overland Park, KS 66214 (913) 541-1222 So the proper method to test your overload compressor starting time and running time current (ampere) and if the overload is not opening circuit during the over current flow then change the overload protector. I replaced the pressure switch as per the instructions. Started the compressor after replacing the switch and it trips the reset button as it try’s to reach operating pressure. Reset the switch and drain off the pressure and it runs until it gets to around 40psi then blows the current overload again.

If the circuit breaker acts irregularly and trips at seemingly random moments, this is a tell-tale sign that bigger problems lurk inside the air compressor.

When a compressor is tripping and very hot the term used is: thermal overload. Electrical connections and how the overload relay stops the motor. In these cases the thermal overload is designed to respond quicker than the breaker. If you continue to have problems with your compressor reset button always tripping off, feel free to add a question here, and perhaps I, or one of our many visitors, can help!

A compressor that is pulling “0” Amps, that has proper line voltage, and has temperatures exceeding 225 degrees Fahrenheit is most likely in thermal overload. Air compressor tripping on overload relay. When the overload relay trips, it does NOT open the main connection itself.

But some time if an overload is not tripping or not make an open circuit during over current flow to the compressor then this overload is not a good overload. An adjustable overload relay could be improperly set up, causing it to trip with a normal surge or temporary overload. Circuit Breaker Tripping; In an air compressor, the current flow is regulated by the circuit breaker, which stops the flow when necessary as a protective measure for the performance and quality of the machine. Responsible for 49 percent of component failures, it is a serious problem – and also one of the most expensive if it progresses to compressor failure.

2. On my last post,I’d discussed about motor overload relay that are common used for motor starter application.As we known,the main purpose of motor overload relay is to protect our electric motor winding from mechanical overload that can result the serious damage..