Thread Tools Display Modes
Old 07-08-2018, 12:43 PM   #1
New Member
Join Date: May 2018
Location: Colorado
Posts: 2
Default Air Conditioner/Generator

I recently bought a '94 Roadtrek. Everything works after considerable time spent on the generator. I had to replace the fuel pump and fix a vacuum leak. The port on the back of the carb was open not allowing the generator to idle. It runs good now and I can get the fan to run on the AC. The problem is the generator kills when the compressor starts. The generator will not ramp up to accommodate the needed load. Any ideas what my next step is?
Thanks, Bob

Bob Salmi is offline   Reply With Quote
Old 07-08-2018, 01:43 PM   #2
Platinum Member
Join Date: May 2016
Location: East
Posts: 2,343


you might need to install the "Soft start" module on the air conditioner.

BBQ is offline   Reply With Quote
Old 07-08-2018, 03:08 PM   #3
Platinum Member
Join Date: Oct 2014
Location: League City, TX
Posts: 451

Hopefully an EasyStart would solve the OP's issue - caveated with the observation that, assuming all equipment is original, his rig was configured to run the roof unit WITHOUT an EasyStart, so why can it not be rehabbed to resume such operation now?

If I were the OP, I'd go with an EasyStart only after I exhausted every other possibility. There may be an easier and cheaper way (if only we knew what it was).

We installed an EasyStart last year and it's the cat's meow, BTW. But in our situation we are running the roof a/c off both the generator and our lithium battery, so our scenario is a bit different. There are a number of different ways to insult a 2,000 watt inverter to the point where it temporarily errors out, but the EasyStart is like the system's diplomat who intervenes and smooths all the ruffled electrical feathers so that everything boots back up again.
InterBlog is offline   Reply With Quote
Old 07-08-2018, 03:37 PM   #4
Platinum Member
Join Date: Dec 2016
Location: America's Seaplane City, FL
Posts: 166

Assuming that is an Onan genny, there is no ramping up from idle. They should always run at 3600 rpm. You may not be done working on the genny. Carburetor issues?

On TDY near Torey UT.
2000 Roadtrek Chevy 200 Versatile
Fun stuff:
'15 Kawasaki Versys650LT
'98 Kawasaki KLR650
SteveJ is offline   Reply With Quote
Old 07-08-2018, 06:20 PM   #5
Bronze Member
Join Date: Nov 2011
Posts: 46

Before tackling on the genset, probably good idea to rule out the AC is not at fault here. Plug the AC directly to a shore power and measure its initial current draw using a clamp Ammeter or something similar to “Kill-A-Watt” monitor.
Roadtrek Agile SS: Roadtrek Mods.
RT.SS is offline   Reply With Quote
Old 07-08-2018, 08:31 PM   #6
New Member
Join Date: Nov 2015
Location: MI
Posts: 12

The generator is designed to run at a constant speed to produce 60Hz AC. The only thing that changes for the engine as output increases is the opening of the carb throttle plate. I suspect that fuel flow is not increasing as air flow increases as the throttle opens in an attempt tp produce more watts. In this case the engine will starve. Something is limiting the fuel flow delivered by the carb.

I believe the generator controls are designed to electrically shut the generator part down in case of electrical overload rather than shutting down the engine.
jaak1993 is offline   Reply With Quote
Old 07-17-2018, 08:05 PM   #7
Bronze Member
Joe's Avatar
Join Date: Sep 2007
Location: Maryland
Posts: 43
Send a message via AIM to Joe

Other than the other listed recomendations. I had a different experience with my Onan 2800. My class B did not, have a auto disconnect when van engen was running for the inverter. So, when the van motor was running and I started the gen. set. I was running to much voltage thru the system. When running vehicle motor and gen. set. I have to manually turn off circuit breaker to inverter. I did not know this nor was advised in my manual. This caused several shorts in the circutry.

Joe is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 08:54 AM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.