Engine Failed to Stop
engine
Description
In engine operation, the engine keeps turning more than 500 RPM or the oil pressure switch stays closed for 20 seconds after shutdown; engine operation shuts down the engine and unit with an alarm, and electric operation will not activate this alarm.
Activation Conditions
When in Engine Operation, engine is turning more than 500 RPM for 20 seconds after unit shutdown or cycled off. Or, Oil Pressure switch is closed longer than 20 seconds after unit shutdown or cycle off.
Unit Behavior
Engine Operation: Engine and unit shutdown and alarm. Electric Operation: This alarm will not activate in Electric Operation.
Reset Conditions
Alarm may be manually reset via keypad or by turning the unit off, then back on again.
Corrective Actions
1. Check To Ensure Engine Is Running - Verify that engine is still running. Engine should not be running. 2. Check Start/Run-Off Switch and Circuit a. Check SROS. It must be in the OFF position. b. Check two way communication equipment. It must not be wired so unit can start with SROS in the OFF position. Correct wiring as needed. 3. Check For Alarm 00130 (Engine Speed Sensor) - Refer to Alarm 00130 Check Engine RPM Sensor. 4. Check ENOPS - Check ENCU-15 to ENCU-18. It should be an open circuit when engine is not running 5. Check Engine Control Unit (ENCU) and Fuel/Speed Actuator (FSA) a. Check voltage to ENCU-22. Verify correct fuse, see Figure 2.8. Must have minimum 11 VDC with the battery connected and SROS in the OFF position. b. Check voltage to ENCU-44. Must have minimum 11 VDC with SROS in START/ RUN. If not, energize the run relay output using Component Test mode (refer to Section 5.2.4) and retest. c. Check for ground at ENCU-19. If ground is not good, check connectors and wiring between terminals for damage, moisture or corrosion. d. Inspect fuel/speed actuator (FSA), engine speed sensor (ENSSN) and engine speed control unit (ENCU) connector pins and terminals. Verify there is no physical damage to components, and no damage or corrosion in connectors. e. Check resistance and amp draw of FSA. Refer to Section 2.12 for specifications. f. Check FSA plunger. Must move in and out freely. Refer to engine manual.