TROUBLESHOOTING THE GENERATOR
Many
troubleshooting procedures
present
hazards
which
can result
in
severe
personal
injury
or
death. Only qualified service personnel with knowledge
of
fuels, electricity, and machinery hazards
should perform service procedures. Review safety precautions on inside cover page.
TROUBLE
No AC Output
voltage
Note: This
condition may
cause the generator
set
to
stop
when the start
switch
is
released.
AC Output Voltage
Too
Low
POSSIBLE CAUSE
1.
Open circuit breaker
2.
Open circuit between
brush block and regulator
or start disconnect relay
contacts
K2-2/K2-6
and
the regulator
3.
Brushes stuck in holder
or not making good contact
with slip rings
4.
Capacitor (Cl) shorted
5.
Faulty start disconnect
relay
(K2)
6.
Open, grounded, or shorted
rotor or stator.
7.
Faulty electronic voltage
regulator
1.
Engine governor incorrectly
2.
Brushes worn or not making
adjusted
good contact with slip
rings
3.
Jumper lead not making
contact on voltage regulator
terminals
1
and
5
CORRECTIVE ACTION
1.
Locate cause
of
overload
and correct as required.
Reset breaker.
2.
Check for continuity and
correct
if
circuit is open.
3.
Release brushes
if
jammed
in holder. Clean slip rings
if dirty.
4.
Check capacitor and replace
if
defective.
5.
Check start disconnect relay
(K2)
normally closed contacts
K2-2/K2-6.
Replace
if
defective.
6.
Test each component for open,
grounded, or shorted windings
and replace
if
defective.
7.
If
other possible causes check
good, replace voltage regulator.
1.
Refer to
Governor
section
2.
Check length
of
brushes and
replace
if
worn excessively.
Clean or replace slip rings.
3.
Check for jumper lead in regulator
connector terminals
1
and
5
and
correct
if
not attached.
8-5
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