Check Engine Oil Pressure
engine
Description
Engine oil pressure is below 12 psig (0.82 bar) for longer than five seconds while the engine is running; engine operation shuts down and alarms, and it will not activate in electric operation.
Activation Conditions
The ENCU circuit is energized (PM-32 to ENCU-44) and engine oil pressure is below 12 psig (0.82 bar) for longer than five seconds while the engine is running.
Unit Behavior
Engine Operation: Shutdown and alarm. Electric Operation: Will not activate in electric operation.
Reset Conditions
Auto reset or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
Corrective Actions
1. Check Engine Oil Level - Check engine oil dipstick. Add engine oil as needed to fill. 2. Check Engine Oil Pressure Switch (ENOPS) Power and Wiring a. Inspect switch, connector pins and terminals. Verify that there is no physical damage to the switch. Check the connections for damage and corrosion. b. Using Component Test mode, energize the ENCU Power Circuit. Check for power at the switch connector. Must have minimum 11 VDC. If not, check the connectors and wiring between terminals for damage, moisture or corrosion. c. Check for continuity from switch connector terminal A to ENCU-15. If good continuity is not present, check connectors and wiring between terminals for damage, moisture or corrosion. d. Check for continuity from switch connector terminal B to ENCU-18. If good continuity is not present, check connectors and wiring between terminals for damage, moisture or corrosion. 3. Check ENOPS Switch - Remove switch, connect to an external pressure source and test. Contacts close on a pressure rise at 15 psig (1.02 bar). Contacts open on a pressure fall at 12 psig (0.82 bar). 4. Check Engine Oil Pressure - Connect mechanical oil gauge. Oil pressure must be greater than 15 psig (1.02 bar.).