35
UnclassifiedElectrical
What This Code Means
Loss of AC Sense; Engine Stopped; Excessive Smoke Under Load; Invalid Set Configuration; Field Overflow; Loss of voltage sense; Loss of quad sense; Engine stopped
Possible Causes
- •Broken or loose wiring connections
- •Broken voltage sense leads
- •Configuration plug P8 not fully seated
- •Control card failure
- •Control fault
- •Control plugs not fully seated
- •Exciter rotor failure
- •External shorts
- •Fuel supply issue
- •Governor actuator operation issue
- •Grounded or shorted field windings
- •Grounded or shorted quad windings
- •Incorrect control part number
- •Incorrect loads
- •Loose voltage sense leads
- •Main rotor failure
- •Mechanical engine damage
- •Output voltage issue
- •Overload Condition
- •Quad leads not fully seated in connector to control
- •Rotating diode assembly failure
Suggested Actions
- 1Check brush condition and contact
- 2Check exciter rotor
- 3Check field windings
- 4Check for grounded or shorted field windings
- 5Check for grounded or shorted quad windings
- 6Check for mechanical engine damage
- 7Check for proper field resistance reading, open to ground
- 8Check fuel supply
- 9Check governor actuator operation
- 10Check loads
- 11Check main rotor
- 12Check mechanical engine damage
- 13Check output voltage
- 14Check rotating diode assembly
- 15Ensure control plugs are fully seated
- 16Ensure quad leads are fully seated in connector to control
- 17Replace the genset control PCB
- 18Troubleshoot Control
- 19Troubleshoot external shorts
- 20Verify control plugs are fully seated
- 21Verify quad leads are fully seated in connector to control
ASK RUDY ABOUT THIS FAULT
Get a diagnosis walkthrough for 35 on your specific Onan unit — cited to the OEM manual, not a forum guess.
TRY IT FREE