Field Service Procedure – Replacement PCU Kit, Coastal
Page
4
of
9
Document No
135553 Rev A
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Tel, Inc. This document may not be reproduced or distributed in any form without prior written
consent of Sea Tel, Inc.
6.5.
POL
Motor
Driver
Test.
This
test
checks
the
ability
of
the
motor
driver
to
drive
current
through
the
pol
motor.
The
current
to
the
motor
is
controlled
by
a
PWM
circuit.
The
PWM
current
is
repeatedly
sampled
and
statistically
analyzed
during
this
test.
“Testing
POL
MTR”
will
be
displayed
as
the
test
runs.
An
Error
code
5.01
‐
5.17
will
be
displayed
if
one
of
these
tests
fails.
A
failure
indicates
a
failed
motor,
motor
driver
PCB
or
harness.
Temporarily
connect
a
spare
motor
to
the
PCU
in
place
of
the
failed
motor
(or
swap
the
POL
motor
with
the
AZ
motor
connection
at
the
PCU)
to
isolate
the
failure
to
the
PCU
or
motor.
Then
rerun
the
same
test.
If
the
test
passes,
replace
the
failed
motor
(if
you
swapped
motors
the
other
motor
test
will
not
fail)
and
rerun
the
BIT
tests.
If
the
test
fails,
replace
the
PCU
and
re
‐
run
the
BIT
tests.
6.6.
Sensor
Test.
This
test
checks
for
null
sensor
offsets
for
a
level,
motionless
system.
The
checks
have
fairly
wide
pass/fail
criteria,
but
can
still
fail
if
pedestal
is
in
motion
or
out
of
level
more
than
a
few
degrees.
“Test
Sensor
Bias”
will
be
displayed
as
the
test
runs.
An
Error
code
6.01
‐
6.05
will
be
displayed
if
one
of
these
tests
fails.
If
any
test
fails,
replace
the
PCU
and
rerun
BIT
tests.
6.7.
Azimuth
Move
/
Rate
Sensor
Test.
This
test
command
moves
the
dish
at
various
speeds
in
azimuth
and
checks
the
results
using
the
azimutrh
rate
sensor.
“Test
AZ
Sensor”
will
be
displayed
as
the
test
runs.
An
Error
code
7.01
‐
7.05
will
be
displayed
if
one
of
these
tests
fails.
An
error
indicates
a
motor
drive
rate
or
sensor
failure.
This
could
be
due
to:
1.
Mechanical
binding
of
the
pedestal
or
the
azimuth
bearing
‐
With
the
power
off,
visually
inspect
the
antenna
and
radome
(inside
of
base
and
top)
for
drag
against
the
radome
or
binding/fouling
of
pedestal
in
the
antenna
cables
or
against
the
cable
connector
bracket.
Rotate
the
antenna
in
azimuth
by
hand
to
feel
for
any
binding
in
the
azimuth
axis.
Re
‐
route
cables
and/or
bend
connector
bracket
to
remove
fouling
with
the
pedestal.
If
the
pedestal
is
dragging
inside
the
radome
itself
or
if
the
azimuth
bearing
has
failed,
the
radome
and/or
pedestal
will
have
to
be
replaced.
If
this
check
found
a
problem
and
you
have
corrected
it,
rerun
the
BIT
tests.
2.
Azimuth
belt
dragging,
or
slipping
‐
Inspect
the
azimuth
drive
belt
for
chaffing
or
wear
(leaves
black
dust).
Inspect
the
azimuth
drive
belt
for
proper
tension
(belt
should
be
taught
when
pinched
in
on
both
sides
of
the
azimuth
motor
drive
sprocket,
it
should
not
flex
more
than
1/16th
inch
on
both
sides
when
pinched.
Re
‐
align
and
tension
the
motor
for
correct
belt
path
and
tension.
If
this
check
found
a
problem
and
you
have
corrected
it,
rerun
the
BIT
tests.
3.
Azimuth
motor
failure
‐
Replace
the
azimuth
motor
and
rerun
the
BIT
tests.
4.
Azimuth
drive
or
azimuth
rate
sensor
failure
‐
Replace
the
PCU
and
rerun
the
BIT
tests.
Summary of Contents for Coastal
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