Generac

1900

UnclassifiedLubrication

What This Code Means

Undervoltage (both zero crosses missing for 1.5 seconds); Undervoltage (little / no voltage, <120V); Undervoltage (no field current but have DPE); Generator Shuts Down for Under 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; Undervoltage; 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 bef

Possible Causes

  • •Brush failure
  • •Circuit in general
  • •Controller measuring no voltage
  • •Faulty AC Sensing Circuit
  • •Faulty Brushed Rotor Assembly
  • •Faulty DB1 Diode
  • •Faulty DB2 Diode
  • •Faulty DPE Breaker
  • •Faulty DPE Circuit
  • •Faulty Fixed Excitation Circuit
  • •Faulty Flash Wiring
  • •Faulty Main Circuit Breaker
  • •Faulty Regulator Output
  • •Faulty Rotor Insulation Resistance
  • •Faulty Stator
  • •Faulty excitation winding
  • •Faulty zero cross circuit
  • •Field boost hardware failure
  • •Improper communication operation or faulty communication wires between AVR and controller
  • •Loose wiring
  • •Loss of voltage for 10+ seconds
  • •Loss of voltage for 10+ seconds reported to controller from AVR via communication line
  • •Loss of voltage for some time (10+ seconds)
  • •Loss of voltage for some time (10+ seconds) reported to the controller from the AVR via communication line
  • •Under-voltage condition reported to controller from AVR via communication line
  • •Voltage reported to the controller from the AVR via communication line
  • •Wire loose

Suggested Actions

  1. 1Calibrate Voltage
  2. 2Check AC Output Voltage
  3. 3Check the communication wires and communication operation between the AVR and controller for proper operation
  4. 4Perform Rotor Insulation Resistance Test
  5. 5Perform Test 2
  6. 6Perform Undervoltage and Overvoltage Testing
  7. 7Repair or Replace Rotor
  8. 8Repair or Replace Wire 14
  9. 9Replace Controller
  10. 10Replace Rotor Only
  11. 11Replace Rotor and Stator
  12. 12Replace Stator Only
  13. 13Test AC Sensing Circuit
  14. 14Test Brushed Rotor Assembly
  15. 15Test DB1 Diode
  16. 16Test DB2 Diode
  17. 17Test DPE Breaker
  18. 18Test DPE Circuit
  19. 19Test Field Flash Circuit
  20. 20Test Fixed Excitation
  21. 21Test Flash Wiring
  22. 22Test Main Circuit Breaker
  23. 23Test Regulator Output
  24. 24Test Stator
  25. 25Test Wire 14 Field Flash Circuit

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