When my a/c unit comes on, after about 2 minutes, it throws a breaker. There is no other load on the any other circuit in the trailer, and the fan never blows...but i'm not sure if it is supposed to run for a short time before the blower comes on.
The unit has not been used for about 1.5 years and it is on a 2005 model travel trailer.
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Re: Unit comes on, then throws breaker
Fan should start at the same time as the compressor. If the fan is not running the pressure could build in the system and cause the breaker to trip. Your fan motor may need replacement, or lubricated if it is not a permanently lubricated motor bearing type. Oil ports will be located on the fan motor for front and rear bearings . There may be a dirt plug in the oil ports.
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You could possibly have a weak set of breakers. If you have access to an amp meter, clamp around on of the wires coming from the breakers so that you can measure the amp draw. If the amp draw of the unit (when running) is lower than the breaker rating, change the breakers. The other problem could be a stopped up rear coil. This is the part that looks like a small radiator the the hot air blows through on the roof. You will have to take the cover off the unit to see the inside of the coil. Look through the rear fan blade and you will be able to see if the condenser coil is stopped up wit dirt etc. Hope this helps.
Run the unit without you being on it time it and see if it runs beyond 2 minutes then get on the unit and see if it shut down. In that case its and lubrication problem. Go to iconfitness.com or call 1-800-999-3756 and order their lube, now if after applying the the lube the the problem persists then you have a worn belt and possibly worn deck then you have to make a decision if it is worth repair Good Luck
Check the amperage of the breaker or change the breaker out completely with a new one. The tripping problem is that the breaker itself is heating up to the point that the bi-metal in the breaker (safety device) is throwing the breaker off. This could be the problem for you however, I would get an ampherage draw from the unit to insure that the breaker is the proper size for the unit. If you can find what kilowatt the unit is divide that number by the amount of current being supplied and that will give you the breaker size.
30 is the correct size breaker for this unit. It sounds like there is a grounding issue going on in the system. Or off of the Thermostat. Something is grounding out causing the switch to trip. Are you running #10 wire to breaker and the unit? If not you will need to increase your wire size
The contactor engages from low voltage power from the thermostat as does the outside condensing unit. You may have blown the low voltage transformer or have a loose thermostat wire. Check line voltage(220 volts) to the transformer. Check load voltage(24 volts) from the transformer. If no voltage out,replace the transformer. If you have voltage out(24) check the thermostat wires and the thermostat. If you have a digital thermostat there is a 5 minute delay in the thermostat after power is restored before it activates.
Throwing the MAIN BREAKER should not happen. Calculate the distance to your main box. Tell me the wire gauge or breaker amperage. Whatever you do, do not get a larger breaker! If its a breaker on this unit Its probably doa with current leak possibly. DO NOT USE fire hazzard IF SHE TRIPS!!! let me know if its your main breaker inthe house. Hopefully you dont have crappy cloth wiring.
It sounds as though the unit is dirty and during high loads, it is haveing trouble keeping up. Pull the unit from it's housing and wash it real good with a hose and sprayer. Its better to pull the unit because you can get to the coiling easier and clean it the way it needs to be clean. I bet this will solve your problem, if not then it may be low on refrigerant and the compressor is locking out and this can sometimes trip a weak breaker.
Check the power cord for damage, and repair anything you find.
If confident enough, open the unit up and inspect all the internal wiring - check for chafed wires and for terminals that have come undone or that are touching anything they aren't obviously meant to.
Check the unit hasn't got wet inside - mop dry then leave to dry out properly in warm air for a couple of days if it has.
If that doesn't throw up anything obvious, then you're probably looking at insulation breakdown of some component (my money would usually be on the element). For a unit like this, I doubt it's economic to start buting spare parts, so you're probably better off buying a new coffee maker.