Piper PA-24 Comanche Service Manual page 640

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PIPER COMANCHE SERVICE MANUAL
TABLE IX· VII. TROUBLeSHOOTING
(cent)
Troubl. Cau.e RemMY
Generator operating Shorted or open armaaue Replace ..nerator or arm·
within rated speed coils. ature.
range but voltaae
output low. (ceet)
-Improper operation of the Adjust reculator.
voltace rel'llator.
Generator operating Wirinl not properly
See electrical system wiring
within rated speed connected.
dialtam.
ranle but voltmeter
indicates zero.
Grounded or open field Remove the leneritor and
coil assembly.
replace with one know:\
to be in load condition.
Generator operating Unstable operation of
Replace voltale reculator.
within rated speed
the voltace reculator.
Use remedy under' 'Gen·
ranle. but voltage
Same as •'Generator
erator operating within
output is erratic. operatin, within rated rated ,pHd ranle but
speed ranle but voltace voltap eutput low".
OUtput low". above. above.
Excessive sparking at
Same .. "Generator
Use remedy under "Generator
generator brushes.
operatinl within rated
operatine within rated
speed ranle but volta,e speed ranae but voltage
outpUt low". above. output low", above.
I
Generator operating
Generator field mapetind
Flash field with a Jumper
within rated speed
in the wroal direction.
wire on regulator between
ranle but system am-
generator and battery.
meter reads off scale.
System ammeter fluctuates
Generatine system
is
ever- Check the system for
excessively when in-
loaded. abnormal loads.
I
dicating rated load.
1
Improper operation of pn- Readjust to operate properly.
erator reverse·current
relay.
Loose connections. Ti&hten connections.
ELECTRICAL SYSTEM
ISSUED: 8/18/72
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