Question about Haier HC48C1VAR Central Air Conditioner

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Breaker keeps tripping after several hours of runtime. System has 40 amp breaker & is only drawing 31 amps.

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Electric motors (when they start to break-down) will run normally for hours (and read amps within the tolerance level).

Then after a long run time - the amps will 'spike' and trip the breaker.

This is a fairly common occurance - although there are other things that can cause a similar problem (though less likely), i.e. a dirty condenser coil, an improperly charged unit - or a bad breaker.

Bottom line. I think you need a Service Tech to take a look at the AC.

hope this helps

Posted on Jun 12, 2010

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Posted on Jan 02, 2017

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1 Answer

Why does my motor guide 50 trolling motor fuse


It depends on how much current the trolling motor is supposed to draw when set to 5. If it's more than 40 amps, then you need a larger breaker. If it isn't more than 40 amps, then your current 40 amp breaker is weak and needs to be replaced.

May 13, 2014 | MotorGuide Electrical Supplies

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Breaker trips after bout 5 minutes


Breakers trip because of heat.
When heat from wire exceeds breaker rating, it trips.
Something is causing heat on the wire, wire is too small for the amp draw, there is short circuit, or breaker is bad.
Replace breaker and/or test wire.

Put amp-meter on wire and read amp draw through wire.
Amps cause heat. That's why high voltage lines from power station are high-volt-low-amp so there is no heat loss with long distance transmission, until transformer at home converts electricity to lower volts and high working amps with enough power to run electrical devices.
Same is true for AC and DC circuits.
If amp reading on wire exceeds rating on breaker for length of time, then breaker will trip.
The fact that the breaker lets current (amps) to flow for a period of time before tripping is because the breaker is probably rated for slow-acting, or it takes a while for amp draw to heat the wire.

Following image shows amp-meter that clips over wire to get amp reading.
http://waterheatertimer.org/pdf/Which-is-best-gas-water-heater.pdf

Oct 31, 2012 | Electrical Supplies

2 Answers

OUr air conditioning system works well until the circuit breaker trips. We added another large return vent in the hall to try to get more air circulating and that didn't work. We just replaced the...


Current (amps) is voltage (volts) divided by resistance (ohms) or I=v/r. Breakers "trip" when there is too much current flowing through them. This can be caused by wiring that is too small for the application or a short (or a bad breaker, but since you just replaced that).

Cable Size:
The conductors have resistance and heat up when current runs through them. Properly sized conductors allow this heat to be dissipated. Long cable runs or cable runs which are tightly bundled with other cables can prevent this dissipation. Heat adds additional resistance which in turns causes more heat, eventually tripping the breaker to prevent a fire. For a 40 amp breaker, the cable should be a dedicated, 8 gauge wire.

Short:
A short (low impedance connection) can be between two conductors or between one conductor and ground (also called a ground fault). Shorts can be tough to track down when they are intermittent. This can be because the insulation was damaged (during installation, by rodents, etc). Moisture can deteriorate insulation or conductors.

It may only be present under certain conditions, so you can try this immediately following a trip. Shut both the breaker and the cutoff at the condenser (you want to isolate the cable), then use a meter to check for bleed between each of the conductors and each other conductor or ground. The neutral eventually connects to ground so it will have zero impedance. If you find there is a connection, you (or your electrician if you don't know what you're doing) will have to track it down and repair it.

It could be a clamp that is too tight where the line enters a jbox or panel, a staple that was driven too far and is biting into the insulation, a bend that is too tight, or a length that isn't supported well and subjected to vibration from a nearby motor .

Other possibilities:
At 40 Amps they'd be really expensive, but are you using a GFI or Arc-Fault breaker? Either of those could cause unwanted tripping.

Good luck with it.
jack g

Aug 06, 2010 | Heating & Cooling

1 Answer

Breaker keeps tripping on outside air conditioner unit


The compressor is probably drawing to many amps. Breaker could be weak also.. Need to check the amp draw on the compressor.

If the breaker is hot when it blows, the compressor is probably going bad.

Jul 27, 2010 | Ruud Central System Air Conditioner

1 Answer

Keeps blowing the breaker... only 6 months old


This compressor is small however like other brands in this size range draw 13 - 15 amps. Thats quite a bit of power. The compressor has a thermal breaker that will begin to trip if compressor is hot. I am assuming that the breaker that is tripping is the one on the compessor. I have seen many hitachi breakers fail. Easy to replace with generic 20 amp, cost about $10. Before you replace anything, check amp draw with meter, if within specs try to determine what is causing heat.
example:
cycling too many times per hour (check manual for recommended)
low power due to weak circuit or extension cord
using generator for powering compressor (not recommended)
using low quality oil (use synthetic if hot climate)
air leaking from intank checkvalve back to pump
If no reason to overheat then replace breaker on compressor to 20 amp but watch for overheating. Good luck

Jul 09, 2010 | Hitachi EC89 4 Gallon Twin Stack Air...

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I have 60 amp circuit breaker on my electrical a/c heater with a 45 amp fuse. I had the unit for 7 years with no problem. This month the 60 amp circuit breaker keeps tripping when the heater goes off. The...


You're unit is a 31/2 ton according to the numbers.Normally, breakers will only be in a half way posistion when tripped. Yes, under most conditions, the fuse will blow before the breaker trips. I have seen this many times, the breaker may be weak, burned, loose wires and so tighten wires, check the condition of the breaker.It sounds like the breaker even though it is 60 amps, is the problem and you should replace it with out hesitating. This will solve you're problem. When you pull the breaker out, look at the metal clips that snap in on the buss bar to see if they have been overheating.And the buss bar its self. You will know. I am sure this will take care of you're problem. Good Luck,
Shastalaker7

Dec 07, 2009 | Goodman CKL42AR42 Air Conditioner

2 Answers

I have a whirlpool WED5300SQ0 dryer that is on a 30 amp circuit , it trips the breaker after about 15 min ,,,it has 10 gage wiring but it is an older house , the breakers look ancient..should i replace the...


If you don't have an AMP clamp to measure the amount of AC current draw. Then I would replace the breaker with a new 30amp. If the electrical panel is a sylvania or Zinco then that is most likely the problem! Those panels use the same breaker type and are terrible at having breakers going bad and tripping premature. If it is one of those type of breakers better dig deep in your wallet as those breakers run $1.25 to $1.50 per amp !

Nov 30, 2009 | Whirlpool WED5300S Electric Dryer

2 Answers

Circuit breaker overheating on rooftop ac after


Possible overcharge or bad breaker. You need to check the amp draw for the unit. If you draw under full load amps and trips breaker breaker is bad.Rus

Jul 13, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

Hi I have a Roper electric dryer since 2000 never had a problem also had an electric dryer for 6 year before that never had a problem with breaker going off now its been happening frequently, all the...


You will neeed an AMP meter.

Take the face cover off the breaker box.
Very carefully, without touching any wires and frying yourself check the amperage on the wires (one at a time) coming off the breaker to the dryer. (While its running with a load of wet clothes)

If the amp draw is very close to the amp rating of the breaker (IE 30 AMP breaker dryer drawing 28.5 AMPs) then you likely have an issue with the dryer and s the amp draw fluctiates a little it pops the breaker.
Several things can cause this. Motor windings going bad, elements going bad, dryer in need of a thourough cleaning etc.

There could also be a short to ground with one component/switch that is only energised during certain cyles. Keep note of when it trips the breaker. If you notice a pattern, that will help determine the problem.

If none of this applies, and the breaker is just poping randomly without having an amp draw higher than its rating, then you have a bad breaker.

If you have no amp meter. You could try replacing the breaker.(With the same rating, DO NOT go higher unless you want a really big bonfire.)

Most breakers are less than 20 bucks.

Thats an easy job, and if will help you isolate the problem by knowing if it's the dryer or breaker.
Otherwise you must either have a good Volt/OHM/Amp meter to trace down the problem.

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2 Answers

Electrical - Air Conditioning


Ben, you are on the right track. To upgrade the breaker, first look at the main house breaker panel and determine if allowing more current through main breaker will be taxing it too highly (will 20 more amps exceed my main breaker limit...what is the main breaker current trip at?) Then look at the wire size leading away from the 40 amp breaker to outside. If it is 6 gage copper or 4 gage copper-clad aluminum wire, you are ok to upgrade. Any smaller wire size could be unhealthy.

Sep 03, 2007 | Heating & Cooling

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