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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.
I f 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-
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