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Author Topic: Brand new AC tripping breaker. Why?  (Read 393 times)

JayBird941

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Brand new AC tripping breaker. Why?
« on: September 13, 2018, 01:18:39 AM »
Hello everyone
I have just replaced and I believe upgraded my ac from a 13.5k to a brand spanking new 15k BTU dometic brisk2. I installed it myself and I started it up and blows cold air for about 5 min then trips my 20amp breaker for my ac. I reset it and same thing 5 minutes of joy and then its out again. One thing I've noticed as well is that right before it trips it gets a little bit quieter. Thank you for your time and any feedback is appreciated.

Arch Hoagland

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Re: Brand new AC tripping breaker. Why?
« Reply #1 on: September 13, 2018, 02:06:16 AM »
If the 120 volts going to the air conditioner is low it will draw more current and possibly kick the breaker. 

What is your source of power and have you measured the power with a voltmeter?
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spencerpj

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Re: Brand new AC tripping breaker. Why?
« Reply #2 on: September 13, 2018, 06:54:47 AM »
And are you running a cheesy thin extension cord from house to camper?  It sure sounds like a power issue, from your power source.

JayBird941

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Re: Brand new AC tripping breaker. Why?
« Reply #3 on: September 13, 2018, 07:37:11 AM »
I definitely need to hookup a voltmeter to further investigate and I am using the right power source with the right cord.

lynnmor

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Re: Brand new AC tripping breaker. Why?
« Reply #4 on: September 13, 2018, 08:15:19 AM »
In addition to the voltage check, see if there are any other loads on the breaker.

Utclmjmpr

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Re: Brand new AC tripping breaker. Why?
« Reply #5 on: September 13, 2018, 08:25:02 AM »
 See if it trips while on the generator.>>>Dan
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spencerpj

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Re: Brand new AC tripping breaker. Why?
« Reply #6 on: September 13, 2018, 09:14:37 AM »
I definitely need to hookup a voltmeter to further investigate and I am using the right power source with the right cord.

Be careful, others will jump in.  Just because you have 120vac, doesn't mean you have the amps necessary. 
What is your power source? 

JayBird941

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Re: Brand new AC tripping breaker. Why?
« Reply #7 on: September 13, 2018, 09:26:16 AM »
Im living on someones property had an eleactrician set up the 120 plug on the side of house and in their breaker in the garage. Everything has been fine electrical wise for a year now. I do not have a generator to hook up to maybe I can find someone who does.

Gary RV_Wizard

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Re: Brand new AC tripping breaker. Why?
« Reply #8 on: September 13, 2018, 09:42:58 AM »
Your new a/c draws a few more amps than the previous, so not terribly surprising.  I suspect the compressor start-up surge is just high enough to push the breaker past its limit.  If the voltage is a bit low (see comments from others), the amp draw is even larger.  What do the install instructions say about breaker and wire size? Are yours sufficient?

IF it is only the compressor surge that is causing the trip, I would consider swapping the breaker for a 20A. I wouldn't do that until I had verified the cause, though.
Gary
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JayBird941

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Re: Brand new AC tripping breaker. Why?
« Reply #9 on: September 13, 2018, 09:54:26 AM »
After I get home from work Im going to check if anything else is hooked up to the 20A breaker in the rv thats supposed to be for the ac alone.

spencerpj

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Re: Brand new AC tripping breaker. Why?
« Reply #10 on: September 13, 2018, 09:54:57 AM »
If an electrician installed it on the outside of house, good chance he used a GFI breaker or outlet.  Those can sometimes go bad and/or act squirley?  Can you tell us what the breaker rating is from the House? 15amp or 20amp.  Your RV simply might be throwing a breaker because what's coming to it isn't good enough.
« Last Edit: September 13, 2018, 09:57:01 AM by spencerpj »

JayBird941

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Re: Brand new AC tripping breaker. Why?
« Reply #11 on: September 13, 2018, 10:47:24 AM »
I'll have to check that as well when I get home. I wasn't there when he did it and never had to check it before. I just know its for the 30 amp plug to the rv.

Gary RV_Wizard

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Re: Brand new AC tripping breaker. Why?
« Reply #12 on: September 13, 2018, 11:39:42 AM »
Quote
I would consider swapping the breaker for a 20A.
Sorry - I misread your original.  It's already a 20A breaker, so swapping it doesn't help.
Gary
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JayBird941

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Re: Brand new AC tripping breaker. Why?
« Reply #13 on: September 13, 2018, 01:37:36 PM »
So breaker in garage is for 30A 120/240....

SeilerBird

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Re: Brand new AC tripping breaker. Why?
« Reply #14 on: September 13, 2018, 01:44:52 PM »
So breaker in garage is for 30A 120/240....
I hope this doesn't mean you have 240 going into the RV.
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JayBird941

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Re: Brand new AC tripping breaker. Why?
« Reply #15 on: September 13, 2018, 01:54:43 PM »
125 to the rv and it looks like the fuse to the ac isnt being shared with anything else
« Last Edit: September 13, 2018, 01:56:34 PM by JayBird941 »

JayBird941

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Re: Brand new AC tripping breaker. Why?
« Reply #16 on: September 13, 2018, 02:08:14 PM »
So far no tripped breaker with fridge turned off...

JayBird941

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Re: Brand new AC tripping breaker. Why?
« Reply #17 on: September 13, 2018, 02:26:56 PM »
Fridge has been on for longer than 5 min now and the ac still runs. Maybe the compressor was shaken up a bit yesterday after I got it on the roof?

spencerpj

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Re: Brand new AC tripping breaker. Why?
« Reply #18 on: September 13, 2018, 02:36:10 PM »
Keep us posted, seems like you have plenty of pow'r.


Gary RV_Wizard

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Re: Brand new AC tripping breaker. Why?
« Reply #19 on: September 13, 2018, 02:49:17 PM »
What make/model of fridge?  I doubt if the fridge even has a compressor. It's an RV absorption fridge, right? But it still consumes 120v power when in electric mode.
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John From Detroit

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Re: Brand new AC tripping breaker. Why?
« Reply #20 on: September 13, 2018, 05:33:13 PM »
I am going to echo the suggestion of many to install a volt meter

There are several you can use, Digital and analog plug in or test lead..

At the minimum you need to go to Harbor Freight and pursue their flyer. Often they have a cheap multi-meter for free with another purchase. Make that purchase a KILL-A-Watt. this is also a Multi-meter. about 1,000 dollars worth of meters...... In a 20 dollar box.   Plug it in and press the Voltage button

(I think that is the default).

YOu can also use it to test thigns up to about 2,000 watts (they are rated 15 amps).
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JayBird941

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Re: Brand new AC tripping breaker. Why?
« Reply #21 on: September 13, 2018, 09:00:35 PM »
AC has been running without tripping the breaker.. Pretty sure the compressor was shaken up a bit and just needed to settle for the 24 hours.

Thank you all for your help.  :)

spencerpj

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Re: Brand new AC tripping breaker. Why?
« Reply #22 on: September 14, 2018, 06:43:36 AM »
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Old_Crow

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Re: Brand new AC tripping breaker. Why?
« Reply #23 on: September 14, 2018, 08:55:43 AM »
That could be it.  I know you have to watch moving fridges(residential style)and not tip them too much, or they don't work right afterwards.
Even the counter-top ice maker we bought had instructions to let it sit for a while before plugging it in.
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