1515

Possible Causes

• •NO SIGNAL
• •BAD NO SIGNAL
• •BAD
• •SHORTED WIRE 18 OR CIRCUIT BOARD
• •Grounding of the ignition circuit
• •Closure of the fuel shutoff solenoid
• •Temperature exceeds approximately 293 ºF (144 ºC)
• •Engine speed exceeds approximately 72 Hz (4320 rpm)
• •Controller does not see a valid rpm signal within three (3) seconds during cranking
• •RPM signal is lost for one full second during running
• •No rpm signal is detected within the first three (3) seconds of cranking
• •RPM signal is subsequently lost again
• •Lack of engine cranking
• •Faulty crank circuit
• •Faulty starter

Suggested Actions

1. 1REPAIR OR REPLACE DEFECTIVE SWITCH
2. 2CHECK INSTALLATION FOR PROPER AIRFLOW
3. 3TEST 64 – CHECK WIRE 18 CONTINUITY
4. 4REPAIR OR REPLACE SHORTED WIRE 18 OR CIRCUIT BOARD
5. 5TEST 61 – CHECK OIL PRESSURE SWITCH AND WIRE 86
6. 6TEST 62 – CHECK HIGH OIL TEMPERATURE SWITCH
7. 7TEST 12 – CHECK STEPPER MOTOR CONTROL
8. 8TEST 55 – CHECK FOR IGNITION SPARK
9. 9TEST 60 – CHECK IGNITION MAGNETOS
10. 10TEST 59 – CHECK SHUTDOWN WIRE
11. 11FOLLOW PROCEDURE IN APPENDIX B
12. 12PROCEED TO PROBLEM 17
13. 13PROCEED TO TEST 45
14. 14Wait for temperature to return to a safe operating level (engine will automatically restart, fault on LCD display will reset)
15. 15Engine speed returns to normal operation (implicit, as the shutdown is to protect from overspeed)
16. 16Controller waits 15 seconds, then re-cranks the engine
17. 17Controller attempts one re-crank attempt before latching out

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