Cessna R182 - Master Switch; Ammeter; Power Switch

CESSNA
MODEL
R,182
SECTION
7
AIRPLANE
&
SYSTEMS
DESCRIPTIONS
MASTER
SWITCH
The
master switch
is a split-rocker
type switch labeled MASTER;
and
is
ON
in
the
up
positiori'and
off
in the
down
position.
The right half
of the
switch,
Iabeled BAT, controls
all electrical'power
to the airplane.
The
left
half, labeled
ALT, controls the
alternator.
removes the
alternator
from the electrical
system. With
this switch
in
the
off
position,
the entire
electrical
load
is
placed
on the battery;rContinued
operation
with.the
alternator
switch
in the off
position
will reiluce
battery
power
low enough'to
open
the battery
contactor,
remove
pou/er from
the
alternator
field,
and
prevent
alteinator
restart.
AVIONICS
POWER
SWITCH
Electrical
power
from'the
airplane
primary
bus
to the avionics
bus
(see
figure 7-8)
is controlled
by
a single
roeker-tylre circuit
breaker-switch
. /
labeled
AVN
PWR.
The switch
is
located on
the right side of the
avionics
-=
\
circuit
breaker
panel
and
is ON
in the
up
position
and OFF
in
the
dorrn
'
position.
with
the switch
in
the
oFF
position,
no electrical
power
will be
applied to the
avionics
equipment,
regardless
qf
the
position
of the
master
switch
or the
individual
equipment
switch'es.
The avionics
power
switch
also functions
irs
a
circuit
breaker.
If an electrical
malfunction
should
occur
and cause
the
circui.t b:reaker
to
open, electrical
power
to the
avionics
equipment
will
be
interrupted
and the
sWitch breaker
will automatically
mbv-e
to the
OFF.position.
If this
occurs,
allow the circuit
breaker
approximately
two
minutes to cool
before
placing
th,e- brea{er
in
the ON
pblition
aga'in.
If the ciqcuit
breaker
opens
again, do not
reset
it
The
ivionics
power
switch
should
be
placed
in
the
OFF
position.prior
to
turning
thl master
switch
on or
off, s.tarting
the engine, or
app-lying
an
-.
external
power
source,
and may
be utilized
in
place
of
the. iridividual
avionics
equipment
switches.
(
AMMETER
The ammeter
indicates
the flow
of current,
in amperes,
from
the
alternator
to the
battery or
from
the battery
to the airplane electrical
system.
When
the
engine
is operating
and
the master switch
is turned
on,
the
ammeter
indicates
the
charging
rate applied
to the battery.
In the
event
the alternator
is uot
functioning or
the electrical
load
exceeds
the
output
of
the altdrnator,
the ammeter
indicates
the battery
discharge
rate'
7-3L