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11.
TROUBLESHOOTING
11-1
NO
AC
OUTPUT
11
-1-1
CHECKING
STATOR
(1)
Remove control panel and disconnect stator
wires at the connectors.
(2)
Measure the resistance between terminals on
stator leads. (See Fig.11-1) Refer to Table
9-1
of Section
9-4
STATOR
for normal resistance.
If
stator is
faulty,
replace it with a new one.
(3)
Check the insulation resistance between sta-
tor core and each stator lead using a Dr. Robin
generator tester in megger tester mode or a
megger tester. (Fig.
11
-3)
If
insulation is bad, replace stator with a new
one.
11-1-2
CHECKING
ROTOR
1)
Field coil
Remove the brush holder and measure resistance
between the slip
rings.
Refer to Section
9-5
RO-
TOR
ASSEMBLY
for normal resistance.
NOTE
:
If the circuit tester
is
not sufficiently accu-
rate, it may not show the values given and may
give erroneous readings.
Erroneous reading will also occur when there is a
wide variation
of
resistance among coil windings
or when measurement is performed at ambient
temperatures different from from
20”
C
(68°F).
I
I
’
\-
Fig.
11-1
Fig-
11-2
I
‘SUP
UNG
Fig.
11-3
-
53-