York H2RA036S06E AC triping breaker


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Old 08-06-16, 07:43 AM
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York H2RA036S06E AC triping breaker

Hi to All, New to this forum and in need to some help with my outdoor AC. unit.
I have a York Model # H2RA036S06E and Serial # WCKM031916.
Feed with 35A (double pole) from Elec. Panel inside and double pole disconnect switch outside.
At first the problem start with outside unit not working (not a tripping breaker), having my background as an Elec. Engineer that worked with mostly with 3 phase Elec. System. I did some research on the net about this AC. unit then went outside to check if the unit getting power first, by opening the disconnect switch, then the cover for the unit connection. All was OKAY to the Universal York Luxaire Contactor Relay 1Pole 30Amp. (024-27531-000) also measured 24VAC. to the Coil.
The Capacitor looked bad (40/5 MFD.). Changed Capacitor with new one, ALL ARE WORKING FINE! (for now saved myself tons of dollar bills)

A one month later with the heat wave that we are facing in the east cost, and having the unit outside working really hard, it start tripping the breaker only after it was working , got to the right Temp. and when it try to kick in the 2nd or the 3rd time.
I did went out again to check that nothing was grounded and causing to trip the breaker.
Now I have a new Capacitor, New Contactor Relay (Installed), and these measurements from the Compressor side - Red wire to Ground - O.L
Black wire to Ground - O.L Browne wire to Ground - O.L
With all wire now were disconnected from the Compressor.
I also take the measurements in-between these wires,
Red to Black -1.1 Ohms, Red to Browne - 2.7 Ohms, Browne to Black - 2.7 Ohms. All wires inside looks good nothing is touching nothing.
No problem with the Fan Motor since its kicking in when the breaker not tripped.

Needs your help
 
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Old 08-06-16, 07:52 AM
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How long a time period passes from when the A/C turns off until it's trying to turn on again? Most systems have a 5 minute time delay to prevent the compressor from turning on too soon after turning off. The reason is that it takes some time for the high pressure to dissipate. If the compressor tries to start shortly after turning off (internal pressure is high), it likely won't start because of the high pressure. The hotter the weather, the longer it will take for the pressure to drop.
 
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Old 08-06-16, 08:25 AM
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Thanks for the Quick reply, Love it.
Got it, Is there any place where i can check or extend the time period before it kicks in again after it get to the desire Temp.? I am guessing now that the breaker will trip if the internal pressure is high and if there is no balance in-between the low and high pressure. I was under the impressions that the breaker will trip every time that a spike on the startup a occurred?
I also replaced the Thermostat
 
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Old 08-06-16, 09:50 AM
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Virtually all newer digital thermostats have built-in time delay (usually 5 minutes). They won't turn on until 5 minutes has passed since they were last on. If you want to add your own time delay to the system, you can add something like the following: https://www.amazon.com/ICM-Controls-.../dp/B000LDKB3W

Here's what you could try to determine whether the time delay is your problem. Turn on the A/C and let it run for15 minutes or more. Turn off the A/C at the thermostat, wait 10 minutes, and then turn the A/C back on. If it starts up, then the time delay may be the issue. If it still trips the breaker, then the time delay is not the problem.
 
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Old 08-06-16, 10:04 AM
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one more thing that I must asked?
In this case, Is a hard start kit going to help the Compressor to kick in smoothly without overload the breaker?......
Please help
 
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Old 08-06-16, 10:29 AM
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thanks for the advice, I am going to try it and let it rest for 10 minutes - see what hapend.
I still think it is the spike of amp that the Compressor drawing on the Startup causing the breaker to trip. no loss connections on all wires.
Will update
 
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Old 08-06-16, 10:35 AM
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I've never used a hard-start kit (I'm a homeowner/engineer, not an A/C tech). However, I believe that it should help the compressor start up without tripping the breaker. However, I would suggest that you try to determine why the breaker is now tripping. If it's because of insufficient time delay after the previous running, that is easily solved.
 
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Old 08-06-16, 10:38 AM
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Just turn it back on after 15 minutes that it was off (from the Thermostat), IT DID TRIP THE BREAKER. so it is not the time delay, per the test.
Next troubleshooting test???
 
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Old 08-06-16, 10:41 AM
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Do you have a multimeter so you can measure the voltage coming out of the contactor when it's energized? Be very careful, as 240VAC is lethal. Measure across the two terminals at both ends of the contactor. One end will be the input voltage, the other end will be the output of the contactor going to the compressor & condenser fan. Compressors don't work well with low voltage.
 
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Old 08-06-16, 11:51 AM
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Just turned the AC, back on, Time 14:05 EST. (breaker OK.) going to let it work for at list 20 minutes. will turn off for 10-15 minutes, then run a test again (from the Thermostat) see if the breaker trip on the next turn on ?
As a side I did grow up on either 1 Phase or 3 Phase System AKA 220V for 1 Phase or 380V for 3 Phase, Always using a good per of gloves (heavy duty insulated) when working with electricity.
the fact that the breaker tripping is not worrying me, because it is not due to a short to ground or loss on wiring side that can cause the breaker to trip. I think the compressor pulling to mach Amp. on the startup, and the breaker just don't like it and do his job. this unit is for the 2nd floor only and it is not a heat pump (Gas furnace), so it doesn't work but in the Summer time.
I need to buy the multi-tester that can measure the amps without the jumpers (Red & Black jumpers). i am looking now for a hard start kit. it may do the job it may not, but at list i know i tried all the options.
if anyone can think of something ales, will apprenticed all the help i can get for now.
Thanks
 
 

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