|
10-21-2016, 08:03 AM
|
#1
|
Junior Member
Join Date: Mar 2016
Posts: 3
|
Generator Problem
I have a 2014 Fleetwood Jambouree when I try starting the gen. it is immediately blowing the 100 amp fuse in the battery box, it just started doing this this past weekend. I have had the genset tested and it is only drawing between 60 and 80 amps at startup. The wire to the genset has been checked for shorts none were found, all the connections have been cleaned and reconnected, the technician said the the genset requires 430 cca's and suggested that it be wired directly to the battery instead of going through the switching system. Does anyone have any other suggestions to this problem.
Thank-you Mike
|
|
|
|
Join the #1 RV Forum Today - It's Totally Free!
iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!
You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!
|
10-21-2016, 08:50 PM
|
#2
|
Senior Member
Join Date: Sep 2015
Posts: 821
|
Does the fuse blow if you run only on the inverter? Shore power? Battery charger? The 100+ fuse protects the batteries from crowbar type shorts. The fuse is connected between the batteries and the transfer relay box. I feel your problem is not with the generator but inverter/battery charging system...possibly a loose connection within the inverter unit.
__________________
John & Debbie
2008 Fleetwood Discovery 40X
|
|
|
10-21-2016, 09:24 PM
|
#3
|
Senior Member
Join Date: Jul 2014
Posts: 35,317
|
Does it blow the fuse at every attemp at starting ?
Only the first attempt of a day ?
Does it crank first and then blow ?
|
|
|
10-22-2016, 02:02 AM
|
#4
|
Junior Member
Join Date: Mar 2016
Posts: 3
|
It doesn't blow when connected to shore power, it blows only when trying to start, I would have to say at the first attempt of the day, if I use jumper cables to bypass the fuse the generator will start but i'm not so sure that is such a good idea each time but I could do this to see if once it is warmed up it starts without the jumper. As the fuses are costing about $10.00 a try I would like to figure it out sooner rather than later. Once the fuse blew I tried using a booster pack on the generator by connecting it to the solenoid at the generator and it started up right away and ran till I disconnected the booster. It tries to crank but blows pretty much right away.
|
|
|
10-22-2016, 03:18 AM
|
#5
|
Senior Member
Join Date: Jul 2014
Posts: 35,317
|
Have you done any work just before it happened ?
Possibly change the oil and overfill it ?
Do you hold the stop switch to prime it ?
Both of the above things could cause some oil or gas to collect in a cylinder. That would cause a hydro lock situation and stop the engine from turning.
If the engine doesn't turn, it strains the starter, causing high amp draw.
My daughter's lawn tractors carburetor, gas shut off, failed. It wouldn't crank right away but after a few seconds would push the gas thru and crank.
|
|
|
10-22-2016, 06:51 AM
|
#6
|
Senior Member
Join Date: Sep 2015
Posts: 821
|
1. Blows 100 amp fuse during starting=Serious high current short in starting circuit.
What model gen is it?
2. Gen only starts and works with another 12 vdc source- This proves no shorts in starter or generator system.
If the gen starts and runs with another 12 vdc starting source and then stops when 12 vdc is removed, that is normal. The 12 vdc supplies power to the gen engine sensors- over temp, under oil pressure, over oil pressure, etc. SO if the control board has power and then 12 volts is removed, the system shuts down.
So it seems to me the problem is in the coach to gen starting circuit... serious short circuit between coach batteries and solenoid, starter. Inspect again your wiring! My experience has shown 90% of problems are caused by cable issues. Good luck and update often!
__________________
John & Debbie
2008 Fleetwood Discovery 40X
|
|
|
10-22-2016, 08:00 AM
|
#7
|
Senior Member
Join Date: Jul 2014
Posts: 35,317
|
I don't think blowing a 100 amp fuse is a serious short.
The starter normally draws 60 to 80 amps so 100 isn't out of the zone if the engine doesn't turn.
The OP stated he jumps the fuse and it starts.
If it was a serious short, jumping the fuse would melt the jumper wire or send a shower of sparks out of any short.
A short in the cable, anywhere before the start solenoid, would blow the fuse randomly, not just when starting.
Are you using the correct amp and type fuse as a replacement. Some fuses are "slow blow" type.
|
|
|
10-22-2016, 08:29 AM
|
#8
|
Junior Member
Join Date: Mar 2016
Posts: 3
|
I haven't tried the first start at the generator it has always been from in the coach. It is an onan RV OG 4000. After the fuse had blown and I connected the jumper cable there was not any spark to indicate any kind of short. Could the fact that it has gotten colder here be a contributing factor? Thank-you for all your replies as all ideas will help me diagnose this problem. Mike
|
|
|
10-22-2016, 09:37 AM
|
#9
|
Senior Member
Join Date: Jul 2014
Posts: 35,317
|
What size fuse does Onan call for, if any.
I'm pretty sure my MH has a resetable Hi-Amp breaker in the generator cable.
Can't check the amps at the moment. We're heading down I 75 in FL.
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|