Question about Carrier Heating & Cooling
Keeps tripping mains circuit breaker
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Posted on Jan 02, 2017
SOURCE: Carrier air conditioner
Sounds like you either blew a transformer, have a bad circuit breaker or blew the main fuse in the outside disconnect. If the indoor unit is still blowing air (no matter what temperature) start looking at the power supply to the outdoor unit. From the circuit breaker, the power will go to a small box located within a few feet from the outside unit. This box will have either a lever on the side or you will be able to open the box and pull out the fuses. From this box the power goes to the condensor. The first thing you should do is to turn off the breaker to the outside unit. Flip it back on and if you have a call for cooling, after about 3 minutes the outdoor unit should start. If it does not, shut off power again to the unit by switching off the breaker, go outside and pull out the fuses in the disconnect box. Using a multi meter, check for continuity thru the fuses. If you have continuity, call your technician. If one or both fuses show no sign of continuity, replace the fuse(s). Make sure that the thermostat is working and sending a signal to the indoor air handler. You may be able to check this by turning the fan switch to "Fan" and see if the blower turns on. You may just have a bad thermostst. Caution should be used anytime you are near electrical components. If you do not have the skill-set required to test electrical equipment, leave it to a proffessional.
Posted on Sep 04, 2007
First off, be sure the pigtail is wired correctly to the back of the unit. Black and red to the outside terminals, white to the middle, green to the frame or cabinet (should be a green screw close-by). If that is ok, you probably have an issue with possibly a bad pigtail, bad outlet, wiring issue, or possibly a bad circuit breaker or breaker box. Probably going to be more of a electrical problem than a appliance problem. Good Luck!!!!
Posted on Feb 02, 2008
If your outside condenser has a locked rotor or short circuit, than the unit WILL trip the breaker - as it should. On the other hand if a breaker is tripped a few times it will have less of a capacity that the rating, (this is designed in it). You will need to determine if the unit is locked (and broken) or the breaker has become too sensitive.
Posted on Apr 22, 2008
I believe you are tripping the breaker because you are too close to the capacity of the breaker based upon the distance from the panel to the heat pump. If you are electrically skilled you could check this by measuring the distance and then looking at the standard to see. If this makes little sense to you, you may need to have an electrician check for u. Either way, good luck with it.
Posted on Feb 04, 2009
Sorry if this is stating the obvious, but this is a sign of an electrical fault. Specifically, what trips the main breaker is leakage to earth (ground). You need a qualified electrician.
Posted on Feb 18, 2009
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