Shutdown Alarms - Carrier VECTOR 6500 Operation & Service Manual

Alarm
Steps
NO.
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:
•
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 7−2.) 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
b. Check engine oil dipstick.
2 Check Engine Oil Pressure Switch Wiring
a. Inspect switch & connector pins &
terminals.
b. Check switch circuit
Check for voltage at switch plug
between pins A (+) and B (ground)
3 Check Engine Oil Switch Harness
a. Inspect harness & control box
connector pins & terminals. (See
wiring schematic Section 10.)
b. Check for shorted circuit in harness,
and continuity through the harness.
4 Check Switch
Remove
external pressure source and test.
5 Check Engine Oil Pressure
Connect mechanical oil gauge.
62-11389
Alarm/Cause

7.4 SHUTDOWN ALARMS

Engine Operation: Shutdown and alarm.
Standby Operation: Will not activate in standby.
switch, connect to an
7−4
Corrective Action
Alarm conditions must be corrected and the alarm
cleared to continue
Add engine oil as needed.
No physical damage to switch.
No damage or corrosion in connector.
Energize circuit. (See Note 2 page 7−2.)
Voltage should be approximately 12 VDC. If OK skip
to step 4, if not continue with step 3.
No physical damage to harness.
No damage, moisture, or corrosion in connectors.
Check for voltage from 2MP17 to plug terminal A
Check for ground at plug terminal B.
Contacts closes on a pressure rise at 15 psig (1.02
bar.)
Contacts open on a pressure fall at 12 psig (0.82
bar.)
Oil pressure must be greater than 15 psig (1.02 bar.)