40
2
(FC_4)
ENGINE FAILS TO START
Whenever the unit is directed to start (MANUAL
OVER-RIDE or AUTO), the system control panel
delivers 12VDC from Wire #56, Pin #3 to the
starter contactor for 10-15 seconds. It then
pauses for 10-15 seconds and repeats the
attempt until 2 minutes of start time have
accumulated.
During the strarting attempt, the starter control
panel also delivers 12VDC from Pin #4, Wire
#14 to the 5 Amp fuse. From the fuse, Wire
#14A delivers the 12 VDC to both the fuel
solenoid and the ECU (Engine Control Unit).
From the fuel solenoid, Wire #14B delivers this
voltage to Pin #5 on the ECU. The ECU controls
the opening of the fuel valve, controlling fuel
flow. Wire #14A also delivers 12 VDC to Pin #15
on the ECU. This is considered a “key on” signal.
Pins #22 and #23 on the ECU recieve a signal
from the RPM sensor. This signals the ECU that
the engine is rotating. When these signals are
received, the ECU will ground Wire #56A (Pin
#3 on the ECU). This will energize PR (Power
Relay) closing it’s contacts. When the PR is
energized, 12 VDC on Wire #15B is connected
to the ignition coil and engine alternator. The
system control panel also monitors Wires #L1
and #L2 for a minimum voltage. When the
system control panel receives the minimum
voltage signal, it recognizes the generator has
started and discontinues the voltage signal to the
starter contactor. However, if the minimum
voltage has not been sensed after approximately
2 minutes of accumlative start time, the system
control panel terminates the engine cranking
cycle.
The digital display will show FC_4 and the
remote LED will repeatedly flash four times with
a pause. The engine will not start until the FC_4
is cleared.
This fail code directs the service technician to
examine systems that could be preventing the
unit from operating. For example:
• No Alternator Output Voltage
• Circuit Breaker in OFF position
• No Fuel
• Blown Fuse
• Fuel Solenoid Failure
• Fuel Supply Discrepancies
• Failed Starter Motor
• Failed Starter Motor Connections
• Engine Component Failures
• Clogged Engine Air Filter
• Failed Ignition System
• Failed Battery Fuse
• Failed ECU Fuse
• Failed Fuel Solenoid Fuse
• Failed ECU
• Failed and/or Damaged Wiring
• Clogged Atmospheric Vent
Troubleshooting Engine Start Failures
1. Reset the fault code detection system.
SEE RESETTING THE FAULT CODE DETECTION
SYSTEM ON PAGE 19.
2. Set SYSTEM switch to AUTO and push
MANUAL OVER-RIDE to start the unit.
3. The engine will do one of the following:
• The engine will start and stop several
times through the 2 minute cycle. If the
engine starts and shuts down every 10-
15 seconds for a two minute duration
then finally shuts down, and FC_4 is
shown on the digital display, the failure
is caused by no voltage on Wires L1 &
L2 at the system control panel. An
OPEN MAIN CIRCUIT breaker could
be the cause. Use FC_3
troubleshooting for this condition
(Page 34).
• The engine will crank and fail to start.
Use TESTS 1-5 for starting failures.
• The engine will fail to crank. Use
TESTS 1-4 for cranking failures.
WARNING
Battery posts, terminals, and related
accessories contain lead and lead
components, chemicals known to the State
of California to cause cancer and
reproductive harm. Wash hands after
handling.
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