Generac Power Systems XT-EFI Series User Manual

Section 1 AC Diagnostic Tests
12 Diagnostic Repair Manual
Test 5 – Field Flash Alternator
(Configuration “A” Only)
General Theory
The alternator utilizes residual magnetism within the
windings to charge the capacitor. If the generator has not
been started for a long period of time, residual
magnetism could be lost within the rotor. Field flashing
the capacitor will restore voltage into the capacitor.
IMPORTANT NOTE:
The capacitor may need to be
discharged before testing. A capacitor can be discharged by
crossing the terminals with a metal insulated screw driver.
IMPORTANT NOTE: Use proper protective equipment
when dealing with a capacitor that has exploded.
Procedure
1. Construct an energizing cord similar to Figure 3-6
and connect as shown in Figure 28.
2. Set START-RUN-STOP switch to OFF.
IMPORTANT NOTE: Do NOT energize the capacitor for
more than 1 second at a time.
3. Momentarily turn on energizing cord (one second).
4. Disconnect energizing cord from capacitor.
5. Carefully re-connect the DPE winding leads to the
capacitor.
6. If the field flash was successful, the generator
should produce approximately 240 VAC at the
main circuit breaker of the generator when the
generator is started and running.
IMPORTANT NOTE: Do not field flash alternator more
than two times in sequence. If the unit has not produced
power after two attempts, other issues exist and need to
be addressed.
Results
1. Generator produces approximately 240 VAC, stop
testing.
2. Generator does not produce 240 VAC, refer to
Troubleshooting Flowcharts.
Figure 3-6. Construction of Energizing Cord
Figure 3-7. Connecting Energizing Cord
12 AWG12 AWG
MOMENTARY PUSHBUTTON ON/OFF SWITCH
SINGLE POLE SWITCH ON LIVE SIDE
DO NOT SUBSTITUTE ANY OTHER DEVICE
4 ft.
CRIMP ON STANDARD
FEMALE BLADE
CONNECTORS
STANDARD
MALE PLUG
003923
CAPACITOR
003924
DEPRESS SWITCH FOR
ONE SECOND
PLUG ENERGIZING CORD
INTO AC OUTLET
CAPICITOR REMAINS CONNECTED
TO GENERATOR
Danger: The capacitor may need to be
discharged before testing. A capacitor can
be discharged by crossing the terminals
with a metal insulated screw driver.
Danger: Use proper protective equipment
when dealing with a capacitor that has
exploded.

Generac Power Systems XT-EFI Series Specifications

General

Brand	Generac Power Systems
Model	XT-EFI Series
Category	Portable Generator
Language	English