Generac

1800

UnclassifiedLubrication

What This Code Means

Generator produces low voltage at no-load; Generator shuts down for overload; Generator shuts down for over voltage; No RPM pulses sensed for 75 consecutive milliseconds while starter active; Cranking faults to RPM sensor loss; Starter engaged, no tooth pulses for 75 ms; While running, no tooth pulses for 75 consecutive milliseconds; Unit Overloaded or Fuel System issue; Low Fuel Pressure; Throttle Stuck Closed/near Closed; No pulse during cranking (RPM sensor); No tooth pulses sensed for 75 consecutive milliseconds while starter active; No pulse during running (RPM sensor); Loss of RPM sensor signal while running; Missing pulses during cranking (RPM sensor); Missing pulses during running (RPM sensor); Underspeed condition detected (<83.3% speed (60 Hz) or <66.6% speed (50 Hz) for 30 seconds); Unit overloaded slowing engine speed; Underspeed condition detected; Low fuel pressure detected for 1200 ms before underspeed; Throttle stuck closed or near closed; Limiting fuel to the engine, s

Possible Causes

  • •Actuator
  • •Fuel supply problem
  • •Heavy capacitive load
  • •Highly inductive loads
  • •Improper communication operation or faulty communication wires between AVR and controller
  • •Low battery
  • •Low fuel pressure detected for 1200 ms before underspeed condition detected.
  • •Low fuel pressure starves the engine, slowing it.
  • •Low fuel pressure starving the engine
  • •Over-voltage condition reported to controller from AVR via communication line
  • •Over-voltage reported to the controller from the AVR via communication line
  • •Overspeed generator
  • •RPM sensor alignment
  • •RPM sensor alignment issue
  • •RPM sensor issue
  • •RPM sensor loss
  • •Shorted condition in a connected load
  • •Shorted condition in one of the load circuits
  • •Starter circuit issue
  • •Stuck closed must be detected for one second with underspeed to set E-Code.
  • •The throttle is stuck closed or stuck near closed limiting the fuel to the engine, slowing it down.
  • •Throttle stuck closed or near closed
  • •Unit is overloaded slowing engine speed
  • •Voltage reported to controller from AVR via communication line
  • •Voltage reported to the controller from the AVR via communication line

Suggested Actions

  1. 1Calibrate Voltage
  2. 2Check AC Output Voltage
  3. 3Check coolant sensor circuit for proper operation.
  4. 4Check fuel supply and settings
  5. 5Check the communication wires and communication operation between the AVR and controller for proper operation
  6. 6Check the inlet/outlet for debris.
  7. 7Correct the fuel supply
  8. 8Open all load breakers and bring them on one at a time to determine which branch circuit is the cause of the problem.
  9. 9Perform Test 2
  10. 10Perform Undervoltage and Overvoltage Testing
  11. 11Problem 3
  12. 12Problem 31
  13. 13Refer to Problem 3 – Generator Shuts Down for Overload / Overvoltage page 55
  14. 14Refer to Problem 31 for RPM Sensor troubleshooting
  15. 15Test 68

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