TROUBLESHOOTING
TESTING AND ADJUSTING
Temperature has an effect on electrical equipment.
When measuring resistance of a cold components, you
will get a lower indication than you will at higher
temperatures. Ohmmeters in general are not accurate.
Given values of resistance will be different (op to 10
percent), if the total error of instrument method,
temperature and the tolerance of the part add in one
direction.
TROUBLESHOOTING PROCEDURES FOR
GENERATOR/REGULATOR
There
are
four
test
sequence
charts
in
Troubleshooting Procedures. Each is for a different
problem. The problems are:
No AC Voltage
Low AC Voltage
High AC Voltage
Unstable AC Voltage
NOTE: Before making any of the tests. first
read all the information on this page and all
the information in General and in Test
Instruments.
Follow the test sequence chart exactly. This test
sequence chart is in a logical order to find the problem
with the minimum amount of time and work. By making
each test in the exact step-by-step order shown on the
test sequence chart, the serviceman can be sure that, at
the end of the test sequence chart, the components are
all good.
NOTE: If a bad part is found and a
replacement part is installed, test the
replacement part also. Then do the rest of
the tests as shown in the test sequence
chart. In this way all the bad parts will be
found. This is important because one bad
part can cause damage to several other
parts. Then do the PROCEDURE FOR FIRST
OPERATION AFTER REPAIR.
NOTE: If the AC voltage is less than 25 volt,.
use the No AC Voltage test sequence chart.
A separate section for troubleshooting problems with
the
generator
mounted
control
panel,
automatic
start/stop
system,
follows
the
GENERATOR/REGULATOR test procedures.
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