Mooney M20K - Page 92

MOONEY
AIRCRAFT
CORPORATION
M20K
SERVICE
AND
MAINTENANCE
MANUAL
Shorted
or
open
armature
cells.
Replace
generator
or
armature.
Improper
voltage
regulator
Adjust
or
replace
regulator.
operation.
Generator
operating
within
Win’ng
not
properly
connected.
See
electn’cal
system
win‘ng
rated
speed
range,
but
diagram.
voltmeter
indicates zero.
Generator
operating
within
Unstable
voltage
regulator
Replace
voltage
regulator.
Use
rated
speed range,
but
operation.
Same
as
listed with
remedy
for
"Generator
operating
voltage output
is
erratic.
"Generator
operating
within
within
rated
speed range,
but
rated
speed
range,
but
voltage
voltage
output
low."above.
output
low."
above.
Excessive
sparking
at
Same
cause
as
listed
with
Same
remedies.
generator
brushes.
"Generator
operating
within
rated
speed
range,
but
voltage
output
low."
above.
Loose
connections.
Tighten
connections.
Burned-out
in line
fuse.
Defective
win’ng.
Check
wiring
for
shorts
and
repairs.
24-3943
BAITtRY
TROUBLE
SHOOTING
TROUBLE
PROBABLE
CAUSE
REMEDY
Discharged
battery.
Battery
worn
out.
Replace
battery.
Improper
charging
rate
setting.
Reset
charging
rate.
Excessive
discharging.
Tum
off
some
equipment
when
aitemator
is
not
charging.
Decrease
starter
usage
by
using
e>demal
power
whenever
possible.
Standing
too
long.
Remove
and
recharge
battery.
Equipment
accidentally
left
on.
Remove
and
recharge
battery.
Impure
electrolyte.
Replace
battery.
Short
circuit
(ground)
in
win’ng.
Check
wiring.
Low
charging
rate.
Adjust
voltage
regulator.
Cracked cell
jars.
Loose
hold-down
bracket.
Replace
battery
and
secure
firmly.
Frozen
battery.
Replace
battery.
Compound
on
top
of
battery
Charging
rate too
high.
Reduce
charging
rate
by
adjusting
melts.
voltage
regulator.
Electrolyte
runs
out
of
vent
Too
much
water
added
to
Drain
battery
and
keep
at
proper
plugs,
battery
and
charging
rate too
level;
adjust
voltage
regulator.
high.
Excessive
corrosion
inside
Spillage
from
overfilling.
Flush container
with
baking
soda
container,
solution.
Leaking
or
clogged
vent
lines.
Repair
or
clean
vent
lines.
Charging
rate
too
high.
Adjust
voltage
regulator.
24-39-03
REV
3
97
14
OLDWILLWAYNE