Generac

2099

UnclassifiedElectrical

What This Code Means

Generator running underspeed for > 30 seconds when undervoltage alarm set; Single Zero Cross missing; Undervoltage due to faulty excitation winding, or zero cross circuit, or circuit in general; One zero cross missing for greater than 1.5 seconds; Field Current measured value is above threshold; The controller fuse is missing or damaged in such a way that it does not work; Fuse problem must be detected for 1.5 seconds; Command and position feedback not matching or taking too much time to achieve; Governor in open position for greater than one second; Governor in closed position (commanded otherwise) for greater than one second; Prolonged Undervoltage; Generator voltage below 80% of nominal for 10+ seconds.; Both Zero Crosses missing Undervoltage; Controller measuring no voltage resulting in undervoltage; Generator voltage less than 120V when undervoltage set; No field current during undervoltage alarm; Generator running underspeed for > 30 seconds when under - voltage alarm set; Single

Possible Causes

  • •governor wire loose
  • •governor module
  • •fuel supply/control system
  • •engine intake exhaust or mechanical issues
  • •field boost hardware failure
  • •overload
  • •Missing / Damaged Fuse
  • •faulty excitation winding
  • •zero cross circuit
  • •circuit in general
  • •Firmware older than V1.30
  • •Brushless Alternator Problem 5 – Generator Shuts Down for Under Voltage page 57
  • •Brushed Alternator Problem 1 – Generator Shuts Down for Under Voltage page 53
  • •Faulty excitation winding
  • •Zero cross circuit failure
  • •Circuit in general failure
  • •Loose wiring
  • •Field boost hardware failure
  • •Loose connections
  • •Broken wire

Suggested Actions

  1. 1Test 68
  2. 2Procedure for Alarm E-Code 1905
  3. 3Procedure for Alarm E-Code 1916
  4. 4Remove Load
  5. 5Procedure for Alarm E-Code 2101
  6. 6Procedure for Alarm E-Code 2400
  7. 7Procedure for Alarm E-Code 2500
  8. 8Procedure for Alarm E-Code 2501
  9. 9Procedure for Alarm E-Code 2502
  10. 10Verify wiring on Wire 194 and Wire 23.
  11. 11Verify customer connection wiring.
  12. 12Test 28 – Test for an Overload Condition page 75
  13. 13Verify VCC settings.
  14. 14Contact Technical Support.
  15. 15Test 101 – Check for Short Circuits page 172

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