Carrier VECTOR 6500 Operation & Service Manual page 156

Alarm
Steps
NO.
31 FAILED TO START - AUTO MODE
•
TRIGGER–ON: Engine has tried to start three times unsuccessfully in the auto start mode.
•
UNIT CONTROL: Unit Shutdown & Alarm
•
RESET CONDITION: Alarm may be manually reset via keypad or by turning the unit off, then back on
again. If the Unit Operation configuration is set to Rail Mode, this alarm will reset after 4 hours.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
alarm(s). (See Note 1 page 7−2.) Operate the unit through the appropriate modes to see if any active alarm
occurs. Continue with the steps below as necessary.
1 Check For Flash Code on Engine Speed Control Unit (ENSCU).
Check for flash codes on the ENSCU. Refer to ENSCU LED Fault Chart, Section 9.5, must
2 Check Fuel Level in Tank.
Check fuel gauge on tank.
3 Check For Alarms
Check for the following alarms:
71 Check for Bad F2 or F3 Fuse
alarm.
40 Check Glow Plug alarm.
35 Check Starter Circuit alarm.
4 Check ENSCU Power
a. Check run relay.
b. Check Run Relay LED.
c. Check voltage to ENSCU.
d. Inspect Fuel Solenoid Actuator
(FSA) & connector pins & terminals.
e. Inspect harness & control box
connector pins & terminals. (See
wiring schematic Section 10.)
f. Check Splice Pack 6 (SP6) (See
wiring schematic Section 10.)
5 Check Fuel System
a. Check fuel system prime.
b. Check fuel flow.
Additional steps on the next page.
Alarm/Cause
7−23
Corrective Action
be no LED alarm codes occurring to continue.
Fill tank as needed.
Alarm conditions must be corrected and the alarm
cleared to continue.
Using Component Test Mode, refer to Section 5.2.2,
energize run relay.
Must be ON.
Must have +12 VDC between
ENSCU13 and ENSCU19 and between
ENSCU24 and ENSCU19 with Run Relay energized
No damage to FSA.
No damage, moisture, or corrosion in connector.
No physical damage to harness.
No damage, moisture, or corrosion in connectors.
No corrosion or oxidation.
12 VDC reading to + battery cable.
No air in fuel system.
Unrestricted fuel flow through system.
62-11389