Generac

1300

UnclassifiedCooling

What This Code Means

Engine cranks and starts, then shuts down within about 5 to 10 seconds; Shutdown-Alarm Low Oil Pressure; External display board is not able to communicate with main board; Main board does not see communication from display board; Overcrank; Low to no fuel pressure while cranking; Overspeed (Over 72 Hz for three seconds); Throttle stuck open; Overspeed (Over 75 Hz for one second); Total loss of control; High temperature (Coolant temp greater than 246 ºF (119 ºC) for 1 second); Overcrank alarm; Overspeed (Over 72 Hz for three seconds with the throttle stuck open); Overspeed (Over 75 Hz for one second with the throttle stuck open, total loss of control); Low oil pressure while running; Controller Fault A; Overspeed (Instantaneous— Over 75 Hz for 1 second)

Possible Causes

  • •Low engine oil level
  • •Low oil pressure
  • •Defective oil pressure switch
  • •Internal Harness Loop Broken (internal to the display board)
  • •Internal harness connecting external display board to main board has become disconnected
  • •Engine/Starter Problem
  • •No Fuel Pressure
  • •Stuck throttle
  • •Air Flow Impeded / Flow Issue
  • •Flow issue
  • •Internal harness loop broken (external display board)
  • •Low to no fuel pressure while cranking
  • •Check the oil level
  • •Air flow impeded
  • •Internal Error
  • •Broken stepper wire

Suggested Actions

  1. 1Navigate to the Digital inputs display screen of the controller, set the controller to MANUAL, and observe Input 2 (Wire 86) for a change from '1' to '0'
  2. 2Replace the controller if the input changes states but the generator still shuts down
  3. 3Check for an intermittent oil pressure problem with a mechanical gauge if the input changed states successfully
  4. 4Fuel pressure has to be measured as low for at least 1200 ms before the overcrank alarm is set.
  5. 5Check the inlet/outlet for debris.
  6. 6Check coolant sensor circuit for proper operation.
  7. 7Check the inlet/outlet for debris
  8. 8Check coolant sensor circuit for proper operation
  9. 9Controller will reboot and transition to the same key state it was in before and resume operation.
  10. 10Because of the nature of cranking there is almost no insight into the cause of an overcrank alarm with the current sensors.

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