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04-04-2022, 07:23 AM
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#1
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Junior Member
Join Date: Apr 2022
Location: Lufkin
Posts: 3
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transfer switch problem
Hello I have a 2021 Raptor 351 and when i run the generator it is not transferring power to the trailer. I have checked and reset all breakers. This is the first time it has done this. Thanks for any help.
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04-04-2022, 07:30 AM
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#2
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Senior Member
Join Date: Mar 2022
Location: oregon
Posts: 117
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I don't have a transfer switch in my trailer, but I'm an electrical engineer. With a transfer switch, you have normal power and backup power. The transfer switch is electrically held in the position of normal power, and when that goes out, it automatically switches to backup power.
Figure out which is which, then double check voltage at each.
__________________
2021 Tundra
2022 175BH
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04-04-2022, 07:39 AM
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#3
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,739
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Quote:
Originally Posted by scuba2
Hello I have a 2021 Raptor 351 and when i run the generator it is not transferring power to the trailer. I have checked and reset all breakers. This is the first time it has done this. Thanks for any help.
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If it worked in the past then what if anything has changed? Some more information would also help, is the generator built into the camper via a transfer switch? If it is, did you kill power to the shore poer cable? Is the generator a stand alone and plugged in via the shore power cable? Do you have an EMS?
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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04-04-2022, 08:18 AM
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#4
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Junior Member
Join Date: Apr 2022
Location: Lufkin
Posts: 3
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Quote:
Originally Posted by scuba2
Hello I have a 2021 Raptor 351 and when i run the generator it is not transferring power to the trailer. I have checked and reset all breakers. This is the first time it has done this. Thanks for any help.
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This is a Toy Hauler, the generator is built in and I have had no problems in the past. The shore power is unplugged. the last time it worked is about a month ago.
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04-04-2022, 08:24 AM
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#5
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Senior Member
Join Date: Nov 2017
Location: Picacho, Az
Posts: 6,809
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Unplug all power sources then open up the transfer switch, it's been reported a couple times lately that loose/poor connections inside the ATS have shorted & burnt it up.
__________________
Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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04-04-2022, 09:17 AM
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#6
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Senior Member
Join Date: Nov 2017
Location: Mico, TX
Posts: 7,444
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My BIL has a Class C and the wires to the transfer switch burned and crashed. I had to open it up and attach the shore power wires going in directly to the wires going out to the coach's breaker panel. The unit was just behind the breaker panel/converter. I think it was a WFSO brand or similar. It was replaced under warranty. Now works OK.
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wiredgeorge Mico TX
2006 F350 CC 4WD 6.0L
2002 Keystone Cougar 278
2006 GL1800 Roadsmith Trike
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04-04-2022, 02:03 PM
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#8
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Senior Member
Join Date: Nov 2017
Location: Mico, TX
Posts: 7,444
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Quote:
Originally Posted by ChuckS
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Thanks Chuck... WFCO it was. You are probably a lot younger with a better memory than I have.
__________________
wiredgeorge Mico TX
2006 F350 CC 4WD 6.0L
2002 Keystone Cougar 278
2006 GL1800 Roadsmith Trike
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04-04-2022, 04:03 PM
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#9
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,819
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Wonder if the transfer switch relay or contactor is stuck…possibly pitted or burnt contacts..try disconnecting all power to the coach including the generator and see if you can find the transfer switch and check that the contactor is releasing
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2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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04-06-2022, 08:42 AM
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#10
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Senior Member
Join Date: Mar 2014
Location: Mountain Home, Idaho
Posts: 3,006
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Wonder if the OP got the issue resolved? with the two manual links TS and fixing should have been fairly easy...
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2007 GMC Classic club cab 4x4 Duramax LBZ
2014 Alpine 3010 RE. 34 foot fifth wheel
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04-06-2022, 09:50 AM
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#11
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Junior Member
Join Date: May 2021
Location: HAINESPORT
Posts: 3
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different issue but similar
My GFI on the inverter 'blows' when changing power source, i.e., from campground to battery. Entire inverter was replaced but same issue. Could it be that the transfer switch is causing the GFI to pop? 2021 Montana 3121 RL
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04-06-2022, 10:52 AM
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#12
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Member
Join Date: Nov 2020
Location: Wildomar
Posts: 52
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Quote:
Originally Posted by TomS
My GFI on the inverter 'blows' when changing power source, i.e., from campground to battery. Entire inverter was replaced but same issue. Could it be that the transfer switch is causing the GFI to pop? 2021 Montana 3121 RL
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I had the same issue. The problem was all the grounds going to different places. I regrounded everything and sanded the frame powdercoating away in most places.
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2020 Ford F350 LB CC 6.7L 4x4
2021 Raptor 351
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04-10-2022, 10:05 AM
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#13
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Junior Member
Join Date: Apr 2022
Location: Lufkin
Posts: 3
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thanks for the help it is a bad Transfer switch. Being replaced under warranty.
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04-17-2022, 09:52 AM
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#14
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Member
Join Date: Sep 2018
Location: Mountain Home
Posts: 55
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That’s good news Suba2. I thought I was having troubles with my transfer switch and it ended up being me. I was chasing the problem turning on my onboard generator and not getting a transfer and turning it off. Finally reread my instruction manual and found it takes several seconds to do its magic and finally switch over. It should be set up where the generator has priority and you can hear it kick over and take control of the coach power from the shore power.
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Idaho, 380TH, Cummins Onan Gen,Step Above MORry steps, Progressive 50 amp surge protector
Winegards Paymaker Satellite Dish,Anderson Hitch
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