24-02-00
Page 24-06
December 1, 1978
1I1
CHART 2401. TROUBLESHOOTING (ALTERNATOR) (cont)
Output circuit defective. Battery charged backwards. Remove battery. Connect
(cont) load such as landing light
lamp or similar load and dis-
charge battery. Recharge
with correct polarity and test
each cell for signs of damage
due to reversed charging.
—NOTE—
This type of condition can
only occur in a case where a
discharged battery has been
removed from the airplane
and put on a charger with the
polarity reversed. This re-
versal in polarity cannot
occur in the airplane due to
any fault in the alternator
system.
Excessive ammeter fluctua- Excessive resistance in field Check all connections and
tion. circuit. wire terminals in field circuit
for deterioration such as
loose binding posts, broken
wire strands at terminals, etc.
Tighten all connections and
replace faulty terminals.
High field circuit resistance. If problem persists, jump
across terminals of the fol-
lowing components one at a
time until the faulty unit is
isolated.
a. Field 5 amp (alternator)
circuit protector.
b. Alternator half of master
switch.
c. Overvoltage relay.
Defective voltage regulator. Replace voltage regulator.
Trouble Cause Remedy
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
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