Carrier VECTOR 6500 Operation & Service Manual page 147

Alarm
Steps
NO.
19 LOW FUEL SHUTDOWN
This is an optional alarm. This alarm will not occur in Standby Operation or if the Fuel Level Sensor Configur-
ation is NO DEVICE or if the Fuel Tank Size Configuration is OFF.
•
TRIGGER ON: The unit is operating in Engine Operation and the fuel level is 10% or less for more
than 1 minute AND Alarm 126 - "Check Fuel Sensor Circuit" is not active.
•
UNIT CONTROL:
•
RESET CONDITION: Auto reset when fuel level is above 12% for more than 1 minute, 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, the active
alarm should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
1 Check For Low Fuel Level Warning Alarm
Check for alarm 1.
2 Check For Low Fuel Level
Check fuel level in tank.
3. Check Low Fuel Level Sensor
a. Inspect sensor & connector pins &
terminals.
b. Check Low Fuel Level Sensor.
4. Check Low Fuel Level Sensor Wiring
a. Inspect harness & control box
connector pins & terminals. (See
wiring schematic Section 10.)
b Check voltage at the Low Fuel
Level Sensor connector with the
microprocessor powered up.
62-11389
Alarm/Cause
Note:
Alarm only or (if configured for shutdown) engine and unit shutdown
and alarm.
7−14
Corrective Action
Must be cleared.
Add fuel as needed to the fuel tank.
No damage to sensor.
No damage, moisture, or corrosion in connector.
Refer to Section 8.9.10 for sensor check out proced-
ure.
No physical damage to harness.
No damage, moisture, or corrosion in connectors.
Voltage reading should be 12 - 13 VDC between ter-
minals FLSA and FLSB.
Voltage reading should be between 0 - 5 VDC be-
tween FLSC and ground wire from unit with sensor
disconnected.