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05-27-2019, 09:34 PM
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#1
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Aug 2015
Location: Northwest Washington State or Western Montana, depending on the season.
Posts: 3,473
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Heat pumps won't run on generator power
What am I doing wrong? We're overnighting in a Cabelas parking lot in Billings, Montana. A little while ago, I fired up the 12KW coach generator, let it run for about three minutes, then enabled the "heat" cycle with temperature set to 67. The inside of the coach was 63 degrees and the outside temperature was 53 degrees.
The heat pumps never came on, but the Oasis heat did as soon as I enabled the diesel burner. The heat pumps worked this morning on shore power just before we got on the road.
What am I missing here?
TJ
__________________
Jim (W7DHC), Diane & Mini Schnauzers, Lizzy & Ellie
2018 Mountain Aire 4047
2014 Honda CR-V 2020 Lincoln Nautilus "toad" w/AF1
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05-27-2019, 09:47 PM
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#2
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Community Moderator
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,520
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Have you checked the breakers on the generator?
__________________
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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05-27-2019, 09:50 PM
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#3
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Senior Member
Newmar Owners Club Freightliner Owners Club Entegra Owners Club
Join Date: Nov 2015
Location: AZ
Posts: 6,425
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Quote:
Originally Posted by TonyDi
Have you checked the breakers on the generator?
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I agree, sounds like the problem
__________________
Newmar 2016 Canyon Star 3710
Newmar 2018 Dutch Star 4369 SP
Newmar 2023 Dutch Star 4369 FL
Entegra 2025 Cornerstone 45D on order
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05-27-2019, 09:50 PM
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#4
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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10 and 12.5K Onan generators only have one breaker on the generator.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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05-27-2019, 09:57 PM
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#5
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Aug 2015
Location: Northwest Washington State or Western Montana, depending on the season.
Posts: 3,473
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I should have thought about the generator breaker. Looks like when I had it serviced a few weeks ago, the tech turned the breaker off and didn't turn it back on. Thanks, folks.
TJ
__________________
Jim (W7DHC), Diane & Mini Schnauzers, Lizzy & Ellie
2018 Mountain Aire 4047
2014 Honda CR-V 2020 Lincoln Nautilus "toad" w/AF1
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05-27-2019, 10:43 PM
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#6
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Senior Member
Join Date: Mar 2016
Posts: 813
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[QUOTE=Tranquil Jim;.
What am I missing here?
TJ[/QUOTE]
When cold, the HP, can take more than a few seconds before they kick in. Also, depends on your climate configuration settings in your SL. There is an Auto setting, Both, primary and secondary only. As to the difference from shore to gen, there shouldn't be any.
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05-27-2019, 11:35 PM
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#7
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Senior Member
Join Date: Jul 2011
Posts: 278
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On our T-stat we have three operational modes. Cool • Heat [which is propane fueled furnace] • and Heat Pump
__________________
07 Newmar VTDP 3330
02 Kaw Vulcan Nomad 1500 on CruiserLift
16 GMC Acadia w/Air Force One & Blue Ox Avail
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05-28-2019, 05:38 AM
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#8
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Senior Member
Join Date: Oct 2012
Location: Foley AL
Posts: 7,138
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Quote:
Originally Posted by Tranquil Jim
I should have thought about the generator breaker. Looks like when I had it serviced a few weeks ago, the tech turned the breaker off and didn't turn it back on. Thanks, folks.
TJ
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Ah yes ... "special service" 
__________________
2005 Newmar Essex 4502, 2013 Caddy SRX
1997 HR Endeavor 37, CAT, 1996 Geo Tracker
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05-28-2019, 07:17 AM
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#9
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Senior Member
Newmar Owners Club Freightliner Owners Club Entegra Owners Club
Join Date: Nov 2015
Location: AZ
Posts: 6,425
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Other then to make sure they work, I have never used my heat pumps, the heated floors are all we need 99% of the time.
__________________
Newmar 2016 Canyon Star 3710
Newmar 2018 Dutch Star 4369 SP
Newmar 2023 Dutch Star 4369 FL
Entegra 2025 Cornerstone 45D on order
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05-28-2019, 07:52 AM
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#10
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Senior Member
Texas Boomers Club
Join Date: Dec 2003
Location: Mo/Texas
Posts: 3,555
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Quote:
Originally Posted by Tranquil Jim
I should have thought about the generator breaker. Looks like when I had it serviced a few weeks ago, the tech turned the breaker off and didn't turn it back on. Thanks, folks.
TJ
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I had the same happen to me several weeks ago after servicing @ Motor Homes of Texas in Nacogdoches, Tx. Fortunately when I stared checking things, I noticed the breaker was off on our 10K gen. 
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05-28-2019, 08:36 AM
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#11
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Aug 2015
Location: Northwest Washington State or Western Montana, depending on the season.
Posts: 3,473
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Thanks, everyone. We are now good; all is working as it should. I've made a note in my pre-travel checklist to verify after a generator service that the breaker is on.
We are currently enjoying breakfast at a rest area near Buffalo, Wyoming. The generator is purring along, the coffee pot is perking some "mud" and breakfast sandwiches are being heated. We stayed overnight at a Cabelas in Billings, Montana, and decided to hit the road early. We did have some encouragement; the guy in the slot next to us looked incapable of pulling his non-Newmar coach out without clipping the front of our coach.  Decided to solve the problem by leaving first and having breakfast down the road.
Thanks again for the help.
TJ
__________________
Jim (W7DHC), Diane & Mini Schnauzers, Lizzy & Ellie
2018 Mountain Aire 4047
2014 Honda CR-V 2020 Lincoln Nautilus "toad" w/AF1
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05-28-2019, 08:49 AM
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#12
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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Don't know what tripping that breaker would have done for him. The engine can still start.
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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05-28-2019, 09:32 AM
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#13
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Senior Member
Join Date: Jul 2014
Posts: 35,424
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Quote:
Originally Posted by 96 Wideglide
Don't know what tripping that breaker would have done for him. The engine can still start.
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It kept the generator from powering up stuff the owner may have left switched on inside. I'm sure its happened.
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05-28-2019, 09:37 AM
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#14
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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Ah, he tripped the breaker before he started the gen after servicing. Got it!
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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Linear Mode
