Onan Generator problem at Norwalk

Bernie Cunningham · 06-23-2016, 04:17 PM

In the past I'have got those to run again by simply unplugging and re connecting as many sensors as you can and most important, the motherboard.
Good luck.

Rich Biebel · 06-23-2016, 05:14 PM

The 7500 diesel is an inverter. The governor is a stepper type motor with 2 wires going to it. It mounts directly on the injection pump cover and controls the fuel rack. Nothing much has ever gone wrong with one of those control motors other than the wire end could have broken from vibration.

Inverter style units are complex....the Inverter section houses the control unit as well as all the electronics of the inverter. Nothing serviceable there. 2 weatherpack style connectors and the input power from the generator's stator.....

The inverters often throw erroneous fault codes....

You check the basics....battery connections...voltage...wire connections if you can get inside it.....beyond that it needs to be repaired by a Cummins-Onan shop....Access to the insides in many MH's is not possible without removing it.

06-23-2016, 04:17 PM	#1
Bernie Cunningham Senior Member Join Date: Jun 2002 Location: Southern California Posts: 560 Likes: 45 Liked 52 Times in 17 Posts	Re: Onan Generator problem at Norwalk In the past I'have got those to run again by simply unplugging and re connecting as many sensors as you can and most important, the motherboard. Good luck. __________________ Bernie Cunningham 7053 STK

06-23-2016, 05:14 PM	#2
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: Onan Generator problem at Norwalk The 7500 diesel is an inverter. The governor is a stepper type motor with 2 wires going to it. It mounts directly on the injection pump cover and controls the fuel rack. Nothing much has ever gone wrong with one of those control motors other than the wire end could have broken from vibration. Inverter style units are complex....the Inverter section houses the control unit as well as all the electronics of the inverter. Nothing serviceable there. 2 weatherpack style connectors and the input power from the generator's stator..... The inverters often throw erroneous fault codes.... You check the basics....battery connections...voltage...wire connections if you can get inside it.....beyond that it needs to be repaired by a Cummins-Onan shop....Access to the insides in many MH's is not possible without removing it. __________________ Rich Biebel S/C 1479 Stock 147R