I have been working on a 97U295 PT10 genny to get it running after it had set for years. I got the engine running and now I am running into major problems with the genny itself. It starts up and runs for a few seconds and then shuts down. As it shuts down I see a red OVERSPEED light on the control box.
I have contacted Powertech and they blow me off with " there are no diagrams or service manuals for that Genny " and I am treated as if I am dumb as a rock.
When I contact Mark Harvey at FT he sends me a wiring diagram and he also states no other info is available. It turns out that the wiring diagram is a generic one and does not fit this genny.
I have ISOLATED the problem to the circuit that HOLDS open the Fuel solenoid after start up but there are several points in the control box where this circuit can be deactivated and no one can tell me where to go from here.
I have ELIMINATED the oil pressure switch and the high temp switch.
I have Eliminated the three relays in the control box.
This genny does not have a latching relay as some do.
It does not have a SPEED SIGNAL wire as some do.
The Dynatech control box is an old version and is wired differently than the newer ones.
This device is attached to the lid of the box and Powertech states they have no Idea what it is.
If anyone can offer any insight to this problem I would appreciate it.
Thanks
Gary, Maybe it is time to consider the newer Dyna Tech ES 52 controller, it will require a slight wiring change, I am sure you can handle it. The ES 52 will solve your problem, have installed dozens of them both 12 and 24 volt versions, they are very simple and work great, besides they are cheap.
Have fun :)
Gary, I have a complete Operation and Installation Manual for Power Tech - Models; PTS MH-15 , PTS MH-10, PTS MH-7.8 . My 1994 U300 has the PTS MH-10 installed, I could copy the manual and fax it to you if it would help and if the model number is correct... Gerry
Remember our earlier models didn't have the auto start system like the later models.
Gerry, I have the operation and maintenance manuals that came with the coach and still the diagrams are generic and have not been very useful. I could really use a diagram that is not generic, if you have that I would appreciate it, I'll need both the Generator diagram and the Engine wiring. Don't fax those manuals until I have exhausted every other idea. If what you have is " ASES52 or ES52F " diagrams I have those and they are wrong.
Dave H. This 97 does have the autostart.
Dave M, I am aware that I can rewire the whole thing and put in a later version of the Dynagen, BUT that does no good until I know WHAT the problem is. I would rather figure out what is wrong rather than throwing parts at it.
Thanks guys
Gary, I fully agree, use a heat gun and try to melt out the flooded area, then you can start checking each component until you are happy, then you can buy the replacement part. :))
I used to enjoy a challenge like that too, but after many hours dissecting such modules, I found I had a better use for my time. :)
Well finally it looks like I have found the problem with this generator. I traced down each and every wire in the control box and found one that had a questionable crimp on fitting. After isolating the problem to the ES52 module I took it out of the control box and left it hang by the wires. Genny started and ran for over an hour, outside temp was in the 30's. I then put the control back in the box and guess what, it ran for less than 10 minutes and shut down. Apparently there is a component in the ES52 that fails when it warms up. I'll look to order a new one after we return from FL winter trip.
Thanks to all of you that supplied diagrams and troubleshooting tips, although this has taken several weeks part time had I simply put it in a shop the outcome would have probably been the same BUT with monster labor charges.
Thanks again
Woohoo!!! Tenacious!!!