Wiring 10−1 - Carrier VECTOR 6500 Operation & Service Manual

Alarm
Steps
NO.
35 CHECK STARTER CIRCUIT
•
TRIGGER–ON: Engine speed fails to reach 50 RPM during 2 start attempts.
•
UNIT CONTROL:
•
RESET CONDITION: Change unit to standby Operation 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
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 That Engine Has Actually Started
Check that engine starts, runs for a
few seconds then shuts off.
2 Check Starter Relay Circuit
a. Check
solenoid relay.
b. Check relay socket and terminals. No signs of discoloration from overheating.
c. Check voltage to starter solenoid
relay.
d. Inspect wiring to starter solenoid
and
schematic Section 10.)
e. Check voltage to starter solenoid. Must be above 11.5 VDC.
f.
3 Check Fuel/Speed Actuator (FSA) & circuit
a. Check Run Relay LED
b. Check for 12 VDC on the Run
Relay circuit
c. Check SPK20 for voltage
d. Check ENSCU terminals 13 & 15
for voltage
e. Check FSA plunger
4 Check Starter
a. Inspect starter and wiring. (See
wiring schematic Section 10.)
b. Check resistance of starter motor. Refer to Section 2.12 for correct electrical values.
c. Check amperage draw of starter. Refer to Section 2.12 for correct electrical values.
5 Check Battery Voltage
a. Inspect battery cable ends and
posts.
b. Test voltage at battery with unit
off.
c. Test specific gravity of battery.
d. Perform load test on battery.
6 Check For Correct Engine Oil
Check for correct oil viscosity (weight)
for conditions.
62-11389
Alarm/Cause
Engine Operation: engine and unit shutdown and alarm.
Standby Operation: this alarm will not activate in standby Operation.
operation of
starter motor. (See
Check voltage to starter motor.
If NO, continue with Step 2 below.
If YES, check wiring to RPM sensor for a broken
wire.
starter Energize Circuit. (See Note 2 page 7−2.)
Relay contacts closed when SSR85 is grounded.
No corrosion.
Negative lead on 85, Positive lead on 86 = 12 VDC.
Negative lead on Gnd, Positive lead on 87 & 30 = 12
VDC.
No physical damage to wiring or battery cable end.
No damage or corrosion in connections.
wiring
Must be above 10 VDC while cranking.
LED 28 must be ON.
Must be 0 VDC
Must be 12 VDC
Must be 12 VDC
Must be free to move
No damage or corrosion.
Wiring and battery cable must be clean and tight
Must be clean and tight.
No corrosion.
Must be above 11 VDC.
Must be 1.225 or higher.
(Follow battery manufacturer's procedure and
guidelines.)
Refer to Section 2.8.
Must be correct for ambient conditions.
7−26
Corrective Action