Generac Impact plus-36 plus II, Mo#00941-2
Generator(LP),starts but will only run for 6 seconds then shuts down. Any ideas? Thanks Helplease.
Forum Discussion
There are several things that can cause the gen to shutdown after start. Is it over speeding? I believe the over speed shutdown is at 4500 rpm.
Is the oil level good? Another thing that would shut it down with the delay you describe is not detecting good oil pressure. The low oil pressure switch (which is normally open) and oil over temp switch which is normally closed) are wired in series, and there is a built in delay at start up to let the oil pressure build up.
You'll need to download the service manual in order to check all the possibilities that could cause the shutdown, but checking the oil pressure and over temp switches is one of the easiest. On my 941-2, behind the air filer there's a wire harness with an unused 2-pin plug, and two single-pin plugs that are in use. The single-pin plug that has purple wires on both sides is for the oil pressure and over temp switches. Unplug it, and if the generator starts and stays running, one of those switches is bad (provided the oil level is good). If either switch is bad, order both and replace them because you'll have to remove the generator from the RV to get to them.
Some other things that can cause this:
Stuck throttle (watch the throttle to see if it moves)
Bad throttle stepper motor or faulty connection to the motor
Loss of connection from the generator control board to the remote mounted inverter (did you know that an inverter is part of this generator?)
Stator timing winding open or shorted
If I remember right, one of the isolation aids for this type of problem is to turn off CB1, and then start the generator. If it runs normally, turn CB1 back on. If it shuts down after a 5-7 second delay, that indicates a problem with the inverter, or with the connection between the generator and inverter.
I hope it's a simple and inexpensive fix for you. Bad inverters or stators aren't cheap to fix. The service manual is pretty good, but it is a complex, electronically controlled unit that may exceed the average owners skill level to service.
:):)
Is the oil level good? Another thing that would shut it down with the delay you describe is not detecting good oil pressure. The low oil pressure switch (which is normally open) and oil over temp switch which is normally closed) are wired in series, and there is a built in delay at start up to let the oil pressure build up.
You'll need to download the service manual in order to check all the possibilities that could cause the shutdown, but checking the oil pressure and over temp switches is one of the easiest. On my 941-2, behind the air filer there's a wire harness with an unused 2-pin plug, and two single-pin plugs that are in use. The single-pin plug that has purple wires on both sides is for the oil pressure and over temp switches. Unplug it, and if the generator starts and stays running, one of those switches is bad (provided the oil level is good). If either switch is bad, order both and replace them because you'll have to remove the generator from the RV to get to them.
Some other things that can cause this:
Stuck throttle (watch the throttle to see if it moves)
Bad throttle stepper motor or faulty connection to the motor
Loss of connection from the generator control board to the remote mounted inverter (did you know that an inverter is part of this generator?)
Stator timing winding open or shorted
If I remember right, one of the isolation aids for this type of problem is to turn off CB1, and then start the generator. If it runs normally, turn CB1 back on. If it shuts down after a 5-7 second delay, that indicates a problem with the inverter, or with the connection between the generator and inverter.
I hope it's a simple and inexpensive fix for you. Bad inverters or stators aren't cheap to fix. The service manual is pretty good, but it is a complex, electronically controlled unit that may exceed the average owners skill level to service.
:):)
