Quote:
Originally Posted by erkme73
Hi Rich - sorry to revive a two-year old thread. Hopefully you're still monitoring for new posts.
I don't want to hijack, but I didn't think starting a new thread, on a very similar issue, for my first post is justified.
I have the same generator (7kw version) that uses the same 300-5374 ECU. It shuts down on its own. It's completely random. Sometimes it'll run for hours without a hick up. Other times, it'll run for 5 minutes then shut down. What is odd is that the shut down is sudden and abrupt. No sputtering, no bogging. It's as though someone hit the stop button.
I've had issues a few years ago with a fuel line that had gotten chewed by rodents. Also had a problem with a rocker arm snapping due to a defect in the cylinder head design. And in those cases, the genny threw an error code.
However, when it shuts down itself, it doesn't blink. When I recall the last error code (clicking the prime button 3 times within 3 seconds), the error reported is from any previous experimenting.
For example, if I ground out the oil transducer line, I'll get error 2 (low oil pressure). If I then let the genny run (with transducer connected) for however long it takes for an auto shut down, when I recall the code, it'll still be 2.
When I run it again, and pull the power to the fuel pump, after it stalls out, I get a 36. If I then restart (with fuel pump back in operation), and it shuts off on it's own, the recalled error code is still 36.
In other words, the auto shut down DEFINITIVELY does NOT register an error code. Unless there is some safety/auto shut down sequence that is triggered/completed which does not generate an error code, my assumption is that I have a bad control board that is randomly telling the system that I hit the STOP button - or I have a short in my cabling that makes it think I hit stop.
To eliminate the latter, I disconnected the remote cable that runs from the dash to the genny - and fired it up. No dice. After about 3 hours of run time, it abruptly shut down again - no error.
I'm getting ready to drop the genny out of it's spot (no easy task on a Damon Intruder) to get access to the wiring. Perhaps there is an internal control cable that is chaffing or melting and grounding out. Or, worst case, I'll have access to the control board(s) to replace it/them.
My primary concern with the genny shutting down randomly is the resulting lack of A/C. In FL, in the summer, with unattended dogs, it can lead to disaster.
Any other ideas?
ETA: The genny is in a 2002 motor home, and has about 600 hours on it. When it runs, it runs like a top. Perfect in every sense - even under full load of both A/Cs. Not a single hick up.
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Momentary loss of battery power could be your issue. Check and make sure your battery connections are good and solid. Especially the ground......
I have found the connection pins at the Controller to be a MAJOR source of intermittant shutdowns.......One pin in particular.....The one that supplies the fuel pump and the carb fuel solinoid(same circuit).......The EFI units are worse as the pumps draw more amperage. The pin heats up.....melts the plastic around it and soon the connection deteriorates........and the hotter the weather the worse it gets. These units run hot as it is and hotter air temps obvioulsy make them run even hotter......
I unlatch the connector and examine the pins. The connector can be taken apart somewhat and I use a needle file and or some small drills to clean the female pin the best I can. I also use clear dielectric grease when I reinstall the connector.
This is a very common shutdown issue but usually sets a fault code.
It is odd that you have no fault code when it shutsdown......Your controller will probably need replacing.
I can change them without removing the unit.....in about 10 minutes....It is very easy to do.......That controller is $450 retail....