Generac

2681

UnclassifiedFuel

What This Code Means

Low fuel warning triggered; Fuel level at 20% or less; Extremely low fuel level warning; Diesel high fuel level warning; External warning indicator true; Fluid basin overfill indicator true; Fluid basin missing indicator true; Governor in open position for greater than one second; Command and position feedback not matching or taking too much time to achieve; Governor in closed position (commanded otherwise) for greater than one second; No message received for 1 second on CAN bus during startup; 12/24V Battery Type system mismatch; No response from I/O Extender 1 for 3 seconds; No response from I/O Extender 2 for 3 seconds; No response from I/O Extender 3 for 3 seconds; No response from I/O Extender 4 for 3 seconds; External Charger Fail digital input is True for 3 seconds while External Charger is enabled; Low fuel level switch triggered for 1 minute; Fuel Level is less than 10%

Possible Causes

  • •Low fuel switch triggered for 1 minute
  • •Fuel level is less than 10%
  • •Fuel level above 90% full
  • •Common warning indicator true for 1 second from configured external source I/O Extender
  • •Fluid basin overfill indicator true for 1 second from configured external source I/O Extender
  • •Fluid basin missing indicator true for 5 seconds from configured external source I/O Extender
  • •Governor wire loose
  • •Governor module
  • •Problem with CAN bus interface
  • •Dealer Config and the Digital Input for confirming a 12/24 V Battery Type system mismatch
  • •Loss of communication with I/O Extender 1
  • •Loss of communication with I/O Extender 2
  • •Loss of communication with I/O Extender 3
  • •Loss of communication with I/O Extender 4
  • •External Charger Failure
  • •Low fuel level (sensor triggers at 20% fuel remaining)
  • •Extremely Low Fuel Level

Suggested Actions

  1. 1Review alarm log
  2. 2Address active alarms
  3. 3Inspect basin tank
  4. 4Contact technical service
  5. 5Test 68 – Check Actuator and Mixer Function page 163
  6. 6Test 106 – Test CAN bus Communication page 174
  7. 7Confirm battery type settings
  8. 8Inspect RS-485 wiring/terminating jumper on I/O
  9. 9Confirm external charger settings on controller menu
  10. 10Check external battery charger
  11. 11Check Fuel Level

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