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Old 06-22-2022, 01:35 PM   #1
Tricky
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No AC with Generator

We cannot get AC to come on will running Generator. We have a 2022 3121RL, Inverter showing Status: Amber, Display: Green, 12.3 volts. Have a CSW2012HX pure sine wave inverter.Thanks
 
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Old 06-22-2022, 01:40 PM   #2
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Did you put your air in off mode then turn your air on 1 at a time, what size is the air?
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Old 06-22-2022, 01:46 PM   #3
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13 in front and 15 in rear I believe. Yes tried turning on again and also checked breaker
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Old 06-22-2022, 02:43 PM   #4
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Just realized no Power to outlets, except solar outlets go I switch in bathroom ok.
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Old 06-22-2022, 02:52 PM   #5
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Your inverter has nothing to do with the AC. Your AC will only run on gen or shore power. If it's not running check your breaker, thermostat or the unit itself.
Correction, I do recall an option for a second inverter prep for the AC unit. But the AC should still work on gen and shore regardless.
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Old 06-22-2022, 02:59 PM   #6
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AC works great on Shore power. So I assume no issues with AC unit, therm or breaker. But thank you very much for trying to help
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Old 06-22-2022, 03:02 PM   #7
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So it works on shore but not on gen. Check the transfer switch.
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Old 06-22-2022, 03:10 PM   #8
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Where is the Transfer Switch? Have checked the battery switches
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Old 06-22-2022, 03:30 PM   #9
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There are 2 circuit breakers in your Onan. Pull off the front cover and the breakers are top left - make sure both are on before checking the ATS.

The ATS is behind the rear wall of the basement, behind the panel closest to the door side.
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Old 06-22-2022, 03:38 PM   #10
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Thanks, will check these out, appreciate you time.
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Old 06-22-2022, 06:34 PM   #11
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There is a transfer switch that the shore power and gen connect to. It's usually in the utility compartment under the steps. If the gen is working and the TS is working you'll hear a clunk after 30 seconds of starting the gen. Best test is to unplug shore and start the gen. If you hear the clunk the TS should have sent power to your AC outlets. If no clunk then no power from the gen or faulty TS or wiring to the TS.
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Old 06-22-2022, 06:47 PM   #12
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The 12.3V display on the inverter tells me the converter is not charging the batteries. The converter uses 120V power so it sounds like the generator is not passing power into the RV>
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Old 06-22-2022, 08:47 PM   #13
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Thank you, will check that out .
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Old 06-29-2022, 02:25 PM   #14
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Quote:
Originally Posted by tricky View Post
we cannot get ac to come on will running generator. We have a 2022 3121rl, inverter showing status: Amber, display: Green, 12.3 volts. Have a csw2012hx pure sine wave inverter.thanks
transfer switch is the problem
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Old 06-29-2022, 02:36 PM   #15
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There was a bad batch of transfer switches.
I believe Progressive Dynamics issued a recall on them.
If that's what you determine it is, call their help desk. They will ship you a new one.
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Old 06-29-2022, 03:29 PM   #16
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Is this the first time running the rig on genny?
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Old 06-29-2022, 10:14 PM   #17
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It’s a 2022, so it has a Southwire ATS. The problem last year was the PD ATS. It’s under warranty, your dealer should have caught that in the PDI. Your ATS doubles as an EMS, so if you have an open ground, low voltage, high voltage, open neutral, etc it will not let power through. It could be wires crossed at the ATS, a loose wire, etc. I would start with Rip’s suggestion. Also, with factory installed Solar you would benefit from our Montana Solar Flex Facebook page. Keep us updated on your progress.
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Old 06-30-2022, 05:51 AM   #18
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Do you have a Bonded plug for the genny?
A bonded plug ties the neutral and ground together.
Usually an EMS will indicate an open ground and not allow power to pass.
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Old 06-30-2022, 12:01 PM   #19
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You might need this plug.

https://www.etrailer.com/Generator-P...rs/HU33FR.html
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Old 06-30-2022, 01:40 PM   #20
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David,
Is this an onboard generator (usually Onan if factory installed)? We're all trying to help, but it would help us to help you if we know. The open ground is an issue when using a prtable generator that quickly becomes an issue when you have an EMS system which, as others have noted, will shut down power when it senses the open ground.
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