Raytheon Beech Baron E55 - Page 681

RayeheOn
AiKraft
Company
BARON
55
AND
58
SHOP
MANUAL
I
Chart
32
TROUBLESHOOTING
ALTERNATOR
SYSTEM
INDICATION
PROBABLE
CAUSE REMARKS
Install
an
accurate
voltmeter
on
the
airplane
bus
to
monitor
alternator
voltage. Operate engines
at
idle
with
all
electrical loads
off,
except
battery.
i.
Voltageoutputdoes
not
a.
Alternator circuit breaker
open
or
a.
Reset
or
replace
circuit
breaker.
increase
with
engine
rpm
defective
circuit breaker.
increase.
b. Two
ampere
fuses
(adjacent
to
b.
Replace
fuse.
over
voltage
relay)
defective.
c.
Wiring faulty
or
improperly
c.
Perform
wiring
continuity
check.
connected.
d.
Voltage
regulator
voltage setting
d.
Adjust
voltage
setting.
Check
improper
or
defective
regulator. regulator.
e.
Alternator
defective.
e.
Repair
or
replace
alternator.
2.
Voltage
increases
to
28.25
volts
a.
Defective
voltage regulator.
a.
Replace
regulator.
and continues to
increase
with
increased
engine
rpm.
3.
Voltage
does
not
increase
to
a.
Low
voltage
setting
in
regulator.
a.
Adjust
voltage
setting
until
28.25
28.25
0.25
volts
at
0.25 volts
is obtained
at
1000
engine
approximately
1000
engine
rpm,
rpm.
4.
Overvoltage
relaytrips
below
30
a.
Defective
overvoltage
regulator.
a.
Replace
overvoltage
relay.
volts
or
32
volts.
Page
84Dec
31/03
SECTION
13
E21