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08-29-2009, 09:29 AM
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#1
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Senior Member
Join Date: Aug 2007
Location: Gilford,Ontario
Posts: 1,064
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Generator Runs But No power to Coach
Generator Onan Starts,Run light on,No Fault Codes,Breaker on Onan control Panel not tripped, But no power to Rig
Shore Power works So Transfer Switch is working!!!
Any ideas
Thanks
Rick
__________________
'05 Kountry Star 3910 ISC 330 Cummins '08 Jeep Wrangler Four Door Blue Ox
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08-29-2009, 09:48 AM
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#2
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Registered User
Join Date: Nov 2007
Location: Montreal/Florida
Posts: 31
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Quote:
Originally Posted by Latitude
snipped...
Shore Power works So Transfer Switch is working!!!
Any ideas
Thanks
Rick
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Are you sure?? The transfer switch (relay contacts) may be frozen/stuck/welded in the shore power position, thus shore power will be connected. Since Shore Power is likely the default position, the relay itself could also be defective.
When the Genny is running, is there power at the switch on the wires coming from the Genny?? Can you hear/feel the relay operate??
The usual problem for these ATS switches is caused by operating them while under load and damaging/burning/welding the contacts. Power transfer should only be done with all loads like A/C, Microwaves etc off.
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08-29-2009, 11:54 AM
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#3
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,599
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Hi Rick,
Double check the transfer switch. Check the outgoing transfer switch power points with a meter, with the generator running.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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08-29-2009, 12:54 PM
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#4
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,676
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Agree with the others - your transfer switch is not transferring. It's stuck in the shore power position or the generator power output is not getting to the switch to cause it to move.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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08-30-2009, 04:42 AM
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#5
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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The transfer switch defaults to shore power. There is no power needed on the contactor coils of the transfer switch to pass the shore power to the coach. When the generator is started, the power from it energizes the contactor coils and the transfer switch now transfers the incoming power from the generator to the coach. You will need to open the transfer switch and with a volt meter measure the incoming generator voltage and the output into the coach. If you have power from the generator and the transfer switch does not put power into the coach (load side of transfer switch) you have a bad transfer switch.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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08-30-2009, 09:52 AM
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#6
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Senior Member
Monaco Owners Club
Join Date: May 2009
Posts: 460
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Check the Time Delay PCB inside the Transfer Switch box. There is a DIP Switch, On or OFF, change the position. I think ON enables the Time Delay, 20 or 30 seconds. Turn it OFF and see if this makes a difference. Have the GenSet OFF and No Shore Power as you open this Transfer Switch Box. If this is your problem you can operate okay while you get a new CB. Make sure you do not have any load until the GenSet warms up.
__________________
2005 Monaco Knight, 3 Slide, 38' PST, Cummins 330 ISC, 34,000 miles on this one !
VMSpc, PressurePro, BrakeSwitch, DeLorme SA2010
2005 Honda CRV, Blue Ox, SMI Brake, TomTom Go 720
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08-30-2009, 10:20 AM
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#7
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Senior Member
Fleetwood Owners Club Appalachian Campers
Join Date: Aug 2007
Location: Greeneville-North East Tn.
Posts: 632
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Mine was as simple as the breakers had been turned off-(at the generator). I flipped them on and everything worked.
Good luck...
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08-30-2009, 08:53 PM
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#8
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Mar 2009
Posts: 1,636
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Check the breakers on the end of the generator not just the one on the front.
Flip them off and back on.
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08-30-2009, 09:43 PM
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#9
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Senior Member
Join Date: Mar 2007
Location: Southern California
Posts: 254
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Quote:
Originally Posted by Latitude
Generator Onan Starts,Run light on,No Fault Codes,Breaker on Onan control Panel not tripped, But no power to Rig
Shore Power works So Transfer Switch is working!!!
Any ideas
Thanks
Rick
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Not sure when you say breaker on Onan control panel not tripped. Its that out on the generator itself? My Onan Quiet Diesel has a circuit breaker out on the generator.
__________________
99DutchStarDP
Southern California
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08-31-2009, 09:34 AM
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#10
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Senior Member
Monaco Owners Club
Join Date: May 2009
Posts: 460
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Your problem is Inside the Transfer Switch Box. The Time Delay Circuit Board (CB) has Failed. Move the DIP Switch to OFF. I had the same problem and it fixed it, temporarily. Just because the Shore Power works does not mean the TS is working. Go to the web site of the TS Mfgr. They describe the way the CB works.
__________________
2005 Monaco Knight, 3 Slide, 38' PST, Cummins 330 ISC, 34,000 miles on this one!
VMSpc, PressurePro, BrakeSwitch, DeLorme SA2010
2005 Honda CRV, Blue Ox, SMI Brake, TomTom Go 720
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08-31-2009, 10:07 AM
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#11
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Senior Member
Join Date: Aug 2007
Location: Gilford,Ontario
Posts: 1,064
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Follow Up
The only Breaker I have found is the one on the control panel a 35 Amp 2 Pole AC Breaker which is on and appears to be OK
The Time Delay BiPass I have located But Is this bipass not for the time delay only ???
By turning it to "Off" only eliminates the time delay It does not by pass the TS?? or am I misinformed????
Still Learning
Rick
__________________
'05 Kountry Star 3910 ISC 330 Cummins '08 Jeep Wrangler Four Door Blue Ox
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08-31-2009, 10:25 AM
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#12
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Senior Member
Monaco Owners Club
Join Date: May 2009
Posts: 460
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If you turn it OFF the TS will immediately switch to the GenSet. It will not allow the GenSet to power the coach when it fails. Shore Power will pass to the coach okay. The CB is in the upper right corner, 4 wires, held in with a little silicone glue.
__________________
2005 Monaco Knight, 3 Slide, 38' PST, Cummins 330 ISC, 34,000 miles on this one!
VMSpc, PressurePro, BrakeSwitch, DeLorme SA2010
2005 Honda CRV, Blue Ox, SMI Brake, TomTom Go 720
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09-01-2009, 09:27 AM
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#13
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Junior Member
Join Date: Jul 2003
Location: new york
Posts: 9
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We had the same problem with our generator, replace transfer switch, no luck. Took it to an Onan dealer and they found the voltage regulator was bad. Runs fine now.
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09-11-2009, 12:26 PM
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#14
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: May 2009
Location: SOUTH LOUISIANA(GOD'S COUNTRY)
Posts: 645
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may be the voltage regulator on the gen set. same thing happened to me.
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