7
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4
62-11389
Alarm
NO.
Steps
Alarm/Cause
Corrective Action
7.4 SHUTDOWN ALARMS
11
LOW ENGINE OIL PRESSURE
•
TRIGGER–ON: Engine oil pressure is below 12 psig (0.82 bar) for longer than 5 seconds while the
engine is running.
•
UNIT CONTROL:
Engine Operation: Shutdown and alarm.
Standby Operation: Will not activate in standby.
•
RESET CONDITION: Auto Reset or Alarm may be manually reset via Keypad or by turning the unit
off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
active alarm(s). (See Note 1 page 7
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2.) Operate the unit through the appropriate modes to see if any active
active alarm occurs. Continue with the steps below as necessary.
1
Check For Low Engine Oil Level Warning Alarm
a. Check for alarm A2
Alarm conditions must be corrected and the alarm
cleared to continue
b. Check engine oil dipstick.
Add engine oil as needed.
2
Check Engine Oil Pressure Switch Wiring
a. Inspect switch & connector pins &
terminals.
No physical damage to switch.
No damage or corrosion in connector.
b. Check switch circuit
Check for voltage at switch plug
between pins A (+) and B (ground)
Energize circuit. (See Note 2 page 7
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2.)
Voltage should be approximately 12 VDC. If OK skip
to step 4, if not continue with step 3.
3
Check Engine Oil Switch Harness
a. Inspect harness & control box
connector pins & terminals. (See
wiring schematic Section 10.)
No physical damage to harness.
No damage, moisture, or corrosion in connectors.
b. Check for shorted circuit in harness,
and continuity through the harness.
Check for voltage from 2MP17 to plug terminal A
Check for ground at plug terminal B.
4
Check Switch
Remove switch, connect to an
external pressure source and test.
Contacts closes on a pressure rise at 15 psig (1.02
bar.)
Contacts open on a pressure fall at 12 psig (0.82
bar.)
5
Check Engine Oil Pressure
Connect mechanical oil gauge.
Oil pressure must be greater than 15 psig (1.02 bar.)