Piper PA-32RT-300T User Manual

LANCE
II SERVICE
MANUAL
f. The
voltage
regulator
heat
sink,
or case,
is the
ground
connection
for
the
electronic
circuit.
Therefore,
if this
unit
is
tested
on
the bench,
it is
most
important
that
a
wire,
No.
8
or
larger,
be
connected
between
the
regulator
case
and
the
alternator.
If
the regulator
does
not
regulate
between
13.6
and 14.6
volts,
one of
the
following
conditions
may
exist:
1.
Regulates,
but
out
of specification.
The
regulator
is out
of
calibration
and
must
be
replaced.
2.
The
voltmeter
continues
to
read
battery
voltage.
(a)
Poor
or
open
connections
within
the
wiring
harness.
(b)
The regulator
is "open."
3.
Voltage
continues
to rise.
(a) Regulator
housing
not grounded.
(b) Regulator
shorted,
must
be replaced.
g. These
are some
of
the
things
to
look
for in
case
of failure:
1. Poor
or loose
connections.
2. Poor
ground
on the
regulator
housing.
3.
Shorted
alternator
windings.
4.
A grounded
yellow
wire
(This
will
cause
instantaneous
failure.)
5.
Disconnecting
the
regulator
while
the
circuit
energized.
6.
Open
circuit
operation
of the
alternator
(The
battery
disconnected.)
1143.
OVER
VOLTAGE
RELAY.
11-44.
CHECKING
OVER
VOLTAGE
RELAY.
The
relay
may
be
tested
with
the use
of
a
good
quality,
accurate
voltmeter,
with
a
scale
of at
least
20-volts
and
a
suitable
power
supply,
with
an
output
of
at
least 20-volts,
or
sufficient
batteries
with
a
voltage
divider
to
regulate
voltage.
The test
equipment
may
be connected
by
the following
procedure:
a.
B+ is
connected
to
"Bat"
of
the over-voltage
control.
b. B-
is connected
to the
frame
of the
over-voltage
control.
c. Be
sure both
connections
are
secure,
and connected
to a
clean,
bright
surface.
d.
Connect
the
positive
lead
of
the voltmeter
to the
"Bat"
terminal
of the
over-voltage
control.
e. Connect
the
negative
lead
of the
voltmeter
to the
frame
of the
over-voltage
control.
f.
The
over-voltage
control
is
set to
operate
between
16.2
volts
and 17.5
volts.
By
adjusting
the voltage,
an audible
"click"
may be
heard
when
the relay
operates.
g.
If the
over-voltage
control
does
not
operate
between
16.2
and
17.5
volts,
it must
be
replaced.
Issued:
1/3/78
ELECTRICAL
SYSTEM
2G21

Piper PA-32RT-300T Specifications

General

Brand	Piper
Model	PA-32RT-300T
Category	Aircrafts
Language	English