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Old 06-08-2016, 07:05 PM   #1
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Transfer switch won't stay engaged

I've listed this problem in another thread, but today right now, I can't run both a/c units without the transfer switch tripping out when the back a/c unit compressor tries to engage, I have to turn both a/c units off, wait for the transfer switch to engage, start the front unit, wait til compressor pulls in, start back one, fan comes on, then when the compressor tries to engage, transfer switch kicks out, there's NO other loads on, fridge is off, water heater is off, no lights on..... This system has got me frustrated and tired of messing and stressing with it!!! Any ideas???! Thoughts????


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Old 06-08-2016, 07:18 PM   #2
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Yesterday at this time, both a/c units worked ok after the 2nd attempt, now both units are working after about 6 attempts. I'm missing something, not sure what.....


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Old 06-08-2016, 07:32 PM   #3
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Interesting and thanks for more input.

As far as I know the transfer switch that comes with the Georgetown between the generator and shore power is just a switch and has no circuitry that monitors amperage and only sees shore power or generator power and switches to that source.

Is this only happening at one campground or multi?

Now if you are having specific issues when on generator power and both AC running it may be that you are exceeding the amperage of the generator and its tripping off.


You just may have one AC starting to fail the way you talk about the compressor kicking in and the power disconnects.
No tripped breakers?
Has the generator mounted circuit breakers ever trip?
Are you in a very hot area?
Are you at a high altitude?
These all relate to the generator and not the transfer switch.

If it happens on both generator and shore power I would look for some loose wire connections in you cable or at the transfer switch.

Have you actually measure with a meter what voltage you are getting from generator and or shore power?

This would tell more if you could do that.
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Old 06-08-2016, 07:43 PM   #4
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What happens if you turn on the back then the front? I am wondering if that rear one is pulling more amps for some reason. Do you have hard start capacitors?


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Old 06-08-2016, 10:36 PM   #5
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Transfer switch won't stay engaged

This issue has been an issue since I bought it in Feb.2013, has16K miles on it now, I replaced the transfer switch with a new Furrion unit just like what I took out, same issue, IT ONLY HAPPENS ON GENERATOR POWER, never have any issues on shore power. I'm in Oklahoma 1000 ft. Sea level, today's high temp was around 90' I've had 2 different dealers check it out under warranty, can't duplicate concern / no problem found etc. both a/c units have been checked for amp draw and was ok / in spec range at the time of testing. I go through this every summer and I'm just so over it already.


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Old 06-08-2016, 10:39 PM   #6
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I added hard start capacitors 2 summers ago and can't tell that they did anything to help.

I have not actually checked the voltage from the generator myself. Was checked under warranty....


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Old 06-08-2016, 11:41 PM   #7
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Have you checked the generator output voltage with a meter when running both AC?

Are both AC the same size?
I have a 15,000 btu front and a 13,500 btu bedroom.
Is your generator an Onan 5500?
How many hours on the generator?
When was the last oil change?
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Old 06-09-2016, 07:03 AM   #8
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Mine does the same thing under generator power only. Had for a year, will run one a/c but not both. Even then it may trip (jump). Dealer says they can't duplicate but I am not crazy. I think that the issue is a heat issue. As you run more amperage things get hot, running both a/c means it also hot ambient temperature. Running down the road the compartment get hot. Heat and electrical things don't work well together. I know it is called a switch but to me it is really relays that have coil. When they get overheated they chatter then you loose power.

Just an idea, but still does not fix this.
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Old 06-09-2016, 08:59 AM   #9
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Quote:
Originally Posted by cbmerton View Post
Mine does the same thing under generator power only. Had for a year, will run one a/c but not both. Even then it may trip (jump). Dealer says they can't duplicate but I am not crazy. I think that the issue is a heat issue. As you run more amperage things get hot, running both a/c means it also hot ambient temperature. Running down the road the compartment get hot. Heat and electrical things don't work well together. I know it is called a switch but to me it is really relays that have coil. When they get overheated they chatter then you loose power.

Just an idea, but still does not fix this.
You are absolutely correct.
On my 5500 watt Onan I have 2- 30 amp circuit breakers and yes during hot weather the generator may stop if the oil is low and will make it shut down on heavy loads.
Many people have seen this.
Good luck all.
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Old 06-09-2016, 10:03 AM   #10
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Transfer switch won't stay engaged

Quote:
Originally Posted by Iggy View Post
Have you checked the generator output voltage with a meter when running both AC?

Are both AC the same size?
I have a 15,000 btu front and a 13,500 btu bedroom.
Is your generator an Onan 5500?
How many hours on the generator?
When was the last oil change?

I have not myself checked voltage, but was checked when under warranty and I was told it was good, front a/c is a 15k, rear is a 13.5K, Onan 5500, just changed oil and filter last weekend, Onan filter/ 15w40 oil. New air filter, new fuel filter, new plugs, 735 hours on generator. But, it's done this since new......


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