Mooney M20R - Alternator Trouble Shooting; Current Sensor Monitor Adjustments Diagram; Miscellaneous Circuits; Trouble Shooting Charts

MOONEY AIRCRAFT
CORPORATION
MZOR SERVICE AND
MAINTENANCE
MANUAL
2. Fuel
Quantity Gauge
Circuits.
Changes
in
fuyel
2438-00
-MISCELLANEOUS
CIRCUITS.
level
vary
fuel
quantity
transmitter
resistance
(two;in
each
tank work in
series with
each
other)
that
operates
1.
Tum Coordinator
Circuit. The
turn
coordinator
is
a
the
fuel
quantity
gauges.
The
Master
Switch
activates
flight
instrument
which
operates
from
an
electrical
power
the
fuel
quantity
indicating
system.
Refer
to
Section
28-
source.
43-00 for
Adjustment
Procedures.
2.
Heated Pitot
Tube.
A
circuit breaker
switch
controls
3.
Fuel
Flow
System
A
turbine fuel
flow
transducelt
is
the
pitot
tube
heater.
installed in
the
fuel
line between
the
engine
driven
RCel
3. Hour
Meter. The
hour
meter
operates
from
the elec-
pump
and
the throttle
body
control of the
fuel
injector
sys-
tric
tachometer.
An
optional
Hobbs
meter
may
be
in-
tem.
The
fuel flow
indicator,
located
on
the
right
sideiof
stalled.
instrument
panel,
is
sent
electrical
impulses
from
t~e
4.
Cigar
Lighter.
A
cigar lighter
is
mounted in
the
right
transducer
to indicate
current
fuel flow
at
a
given
povJer
instrument
panel.
setting.
5. Current
Sensor Monitor
(Ref.
Fig.
24-1C)
I
Effectivity
S/N 290132
thru
29-TBA)
RIGHT
FUEL
LEVEL
MINIMUM
LEFT
DIM
LEVEL
FUEL
LEVEL
2) 1’(13) ~14) (15
LEFT
ALTERNATORi
FUEL
SETUP
RIGHTJ
NORM~---cCAL
ALTERNATOR
CURRENT
SENSOR
MONITQ~R
ADJUSTMENTS
FIGURE
24- 1C
2e39QO
TROUBLE
SHOOTING
CHARTS
2439-01
ALTERNATOR
TROUBLE
SHOOTING
TROUBLE
PROBASLE
CAUSE
REMEDY
Aitemator
over-charges battery;
bat-
Faulty
regulaaor.
Check
bus
voltage
with
engine
running.
tery
uses
excessive
water.
Observe
aircraft
ammeter.
Ammeter
should indicate
near
zero
after
ten
min-
utes
of
engine
operation.
Replace
volt-
ALT
FIELD
circuit
breaker
trips.
Circuli
shorted
in
winng,
age
regulator
if defective.
Disconnect
lead
from
pin
5
of
regulator,
and
reset
circuit
breaker. If
circuit
breaker
trips,
check
wiring.
Repair
as re-
quired.
If
breaker does
not
trip,
replace
regulator.
Reconnect
lead
to
regulator.
Tum Altemator
Field
Master
Switch
’ON"
and
check
for
24
volts
at
pin
5
of
regulator.
Repair
wiring
if
no
voltage
is
present.
ALT
circuit
breaker
trips.
Short
circuit
in
wiring.
Disconnect
lead
from
post
of altema-
tor,
and
reset
ALT circuit
breaker.
If
cir-
cuit
breaker
trips,
check
wiring
between
attemator
and circuit
breaker.
Short
circuit
ih
aitemator.
Replace
lead
to
post
of
altemator.
WARNING:
BE
SURE
MAGNETO
SWITCH
IS OFF
WHEN
TURNING
PROPELLER.
Rotate
propeller by
hand
to
rotate
alter-
nator
through
360"
of
travel. If
circuit
breaker
trips, replace
alternator.
Altemator
will
not
keep
battery
Battery
malfuhction.
1.
Start
engine,
adjust
for
1
500
RPM.
charged.
Ammeter
should indicate
a
heavy
charge
rate
with
all
electrical
equipment
tumed
off. Rate
should
taper
oft
in
1 3
min-
utes.
24-38-00
REV.
10-98
10
Island Enterprises