Generac

1400

UnclassifiedCooling

What This Code Means

Continuity to engine ground measured on disconnected Wire 86; Engine faults out on OVERTEMP; High Temperature (Coolant temp greater than 246 ºF (119 ºC) for 1 second); High Temperature; Running Lean; Cranking with Low Fuel Pressure faults to rpm sensor loss; Running with low fuel pressure faults to rpm sensor loss; High temperature (Coolant temp greater than 246 ºF (119 ºC) for 1 second); High temperature; Cranking with low fuel pressure; Running with low fuel 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; 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

Possible Causes

  • •Air Flow Impeded / Flow Issue
  • •Air flow impeded
  • •Air flow impeded / Flow issue
  • •Air flow impeded / flow issue
  • •Air pocket in fuel line
  • •Debris at inlet/outlet
  • •Debris in inlet/outlet
  • •Defective high oil temperature switch
  • •Defective switch
  • •Dirty fuel
  • •Engine/Starter Problem
  • •Flow issue
  • •Ignition fault
  • •Improper airflow
  • •Inadequate airflow through the generator
  • •Inlet/outlet blocked by debris
  • •Internal Harness Loop Broken (internal to the display board)
  • •Internal harness connecting external display board to main board has become disconnected
  • •Internal harness loop broken (external display board)
  • •Low fuel pressure for 1200 ms
  • •Low fuel pressure for 1200 ms preceding high temperature alarm
  • •Low fuel pressure for at least 1200 ms
  • •No Fuel Pressure
  • •Obstructions preventing cooling air from entering or exiting the enclosure
  • •Short to ground on Wire 86
  • •Short to ground on wire 85
  • •Stuck throttle
  • •Switch contacts closed at 293 °F (145 °C)
  • •Temperature exceeds approximately 293 ºF (144 ºC)
  • •Temperature switch contacts failed in a closed position
  • •Very low fuel pressure while running
  • •Very low fuel pressure while running (low for 1200 ms preceding high temperature alarm)

Suggested Actions

  1. 1Allow temperature to return to a safe operating level for automatic restart and fault reset
  2. 2Check High Oil Temperature Switch
  3. 3Check coolant sensor circuit for proper operation
  4. 4Check coolant sensor circuit for proper operation.
  5. 5Check installation for proper airflow or replace defective switch
  6. 6Check the inlet/outlet for debris
  7. 7Check the inlet/outlet for debris.
  8. 8Check wire 85 for a short to ground
  9. 9Clear any faults in the controller before proceeding with any running diagnostic steps
  10. 10Clear any faults in the controller before proceeding with diagnostic steps
  11. 11Disconnect wire 85 and wire 0 from the high oil temperature switch and test resistance across switch terminals
  12. 12Disconnect wire 85 and wire 0 from the high oil temperature switch and test switch resistance (should read INFINITY / 0L)
  13. 13Disconnect wire 85 and wire 0 from the high oil temperature switch and test switch terminals for INFINITY (0L) resistance
  14. 14Ensure at least 3 ft (1 m) of clear area around the entire generator unit
  15. 15Ensure at least 3 ft (1 m) of clear area around the entire unit
  16. 16Fuel pressure has to be measured as low for at least 1200 ms before the overcrank alarm is set.
  17. 17Fuel pressure must be measured as low for 1200 ms preceding high temperature alarm to set this E-Code.
  18. 18If switch tests good and no true overtemperature condition exists, remove harness connector from controller and test wire 85 for a short to ground
  19. 19Perform Test 62
  20. 20Proceed to Test 45
  21. 21Remove obstructions preventing cooling air from entering or exiting the enclosure
  22. 22Repair or replace Wire 86 as needed
  23. 23Test 62
  24. 24Test 62 – Check high oil temperature switch
  25. 25Verify that the engine has cooled down (engine block cool to the touch) to allow switch contacts to open
  26. 26Verify that the engine has cooled down (engine block is cool to the touch)
  27. 27Verify that the engine has cooled down (engine block is cool to the touch) to allow contacts in the high oil temperature switch to open

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