This is a 97 with the 8KW generator. I noted a couple of threads lately regarding loose wires in the control box so I took a look at mine (gen was working fine). In the process of cleaning and reseating I found two wires not connected. I don't have the proper schematic for this thing. Anyone have it?
Anyhow, There's a little tranformer (blue oval) in the control box. It has 2 black wires on top, one to a switch and the other to ground. It has 2 green wires on the bottom. One trails off into the box with a female spade terminal on it. No place to plug it that I could see. The other green wire (yellow arrow) runs to the control module on the face (the part with the hour meter, circuit breakers and fuse). It is skinned on the end and it is laying adjacent to another green wire that goes to the ground terminal on the control module. I think it just fell out.
So my questions are: Anyone have the proper schematic and anyone know if this green wire just combines with the other green on the control module?
Thanks.
jor
On the controller I have a wire connected to terminals 5,6,7,10,11,12. This is on a 1999 10KW generator so they may be the same, or not. Not sure about the transformer since the one in mine is disconnected.
I'm in the process of re-doing the wires in mine since I keep having broken wires. I'll be using these wiring ferrules which I used during my work days.
KANGORA Wire Crimping Tool Kit w/800 Terminal Connector Sleeves | Electrician... (https://www.amazon.com/gp/product/B07212XQTV/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1)
Looks like a ground wire. Try testing it with a voltmeter to see if there is continuity with ground.
Sorry, don't have the wire diagram for it.
On a side note, how do you get the generator to slide out? Mine seems stuck. But not sure how to unlock it. There also seems to have some bolts missing. And my electrical box is missing 3 of the 4 screws.
Bob
Look for 2 bolts (1/2in I think?), 1 on each side at the bottom slide rails. Remove those bolts and the gen should slide forward. That's how mine is anyway.
Here are the two bolts that bdale is referring to. They are 1/2". Just remove them and really yank on the base plate handle. Some get really stuck. If you can't get it out, you can remove the rubber cover on the bottom and attack it more aggressively.
jor
Jor,
Call Cummins if it's an Onan generator. The engine is probably a Kubota. They service then as part of their Coach Care program. They will have a wiring diagram.
Keith
Thanks for the tip. I just got the info I need on the transformer. Turns out it is not needed. That explains why folivier's is disconnected.
jor
Closing out this thread. I ended up removing the transformer and throwing it. Thanks to BillW I learned that the transformer was for the speed control and that function is now handled by the newer ES52 control module. Everything was nice and tight but I went ahead and cleaned and reseated all the wires. I did find two (on the new ES52) which were just wrapped around the screw so I added ring terminals to those. Anyhow, glad to have gotten in there and poked around for awhile.
jor
Jor, is that ES52 an autostart board? Also, I understand there was at one time a kit for relocating the control box to the drivers side bay. Each start and shutdown sequence causes the genset to go into paint shaker mode....be nice to get these controls isolated from that. Anyone done that?
From my research the ES52 is not an autostart board, that would be a different component. The ES52 performs the preheat, alarm, shutdown, and other functions but not autostart based on battery low voltage or high inside temperature.
goggle dynagen es52 autostart, the es52 I have in my 97 U270 is the low voltage start.
Chuck,
When I bought my coach the previous owner had had FOT move the auto-start function to the driver side bay, leaving the control board, circuit breaker for the cooling fan and the two big main circuit breakers in the box on the generator. Over Time I had to replace the control board and repair several broken wires. I finally decided to move everything but the two main 120 volt circuit breakers off the generator and into the driver side bay. There was already a flexible conduit run from the box on the generator to that bay so all I had to do was pull half a dozen wires through the conduit (it was a tight fit) and mount a small box to contain the components. Now the brains for the generator are accessible and ride smoothly and quietly in that side bay.
Richard
On my 1999 36' U320 the ES52 is the starting and control module which handles preheating, starting, and alarm/shutdown, but not a low battery voltage auto start. I also have the factory installed separate autostart module under the dash which does AFAIK provide a low voltage startup. This module sends a start signal to the ES52.
I think there may be a misunderstanding of what "autostart" means. In my case I'm referring to the autostart module under the dash which does autostart the generator on low battery voltage. The Dynagen ES52 manual states that it is an autostart controller but I'm understanding that to mean that once the ES52 receives a start signal (from whatever source) that it controls preheat, startup, and alarm/shutdown functions.
Again this is what my coach has, and since I'm the 3rd owner I have no way to know if this is how the factory built it or if it was modified in some way by a PO.
That's what we're talking about! Thanks for upgrading my next coach. (inside joke)
This drawing may help to clarify the auto start function. The "auto start module" is the Dynagen ES52. In the lower right corner is the BCM-12 which is what senses the battery voltage and sends a start signal to the ES52 when the low voltage setpoint is reached.
Hopes this helps.