Field Service Procedure – Replacement PCU Kit, Coastal
Page
3
of
9
Document No
135553 Rev A
Copyright © Sea Tel, Inc 2012 - The information contained in this document is proprietary to Sea
Tel, Inc. This document may not be reproduced or distributed in any form without prior written
consent of Sea Tel, Inc.
6.1.
Analogue
to
Digital
Convertor
Test.
This
test
checks
for
basic
communication
with
the
Analogue
‐
to
‐
Digital
Converter
on
the
PCU
main
board.
A
bad
A/D
could
make
all
other
tests
fail.
“Testing
ADC”
will
be
displayed
as
the
test
runs.
An
Error
code
1.01
‐
1.08
will
be
displayed
if
one
of
these
tests
fails.
If
any
test
fails,
replace
the
PCU
and
re
‐
run
BIT
tests.
6.2.
Digital
to
Analogue
Convertor
Test.
This
test
checks
the
basic
integrity
of
the
Digital
‐
to
‐
Analogue
Converter
on
the
PCU
main
board
by
looping
back
one
of
its
outputs
to
the
D/A.
“Testing
DAC”
will
be
displayed
as
the
test
runs.
An
Error
code
2.01
‐
2.21
will
be
displayed
if
one
of
these
tests
fails.
If
any
test
fails,
replace
the
PCU
and
re
‐
run
BIT
tests.
6.3.
Azimuth
Motor
Drive
Test.
This
test
checks
the
ability
of
the
motor
driver
to
drive
current
through
the
azimuth
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
AZ
MTR”
will
be
displayed
as
the
test
runs.
An
Error
code
3.01
‐
3.17
will
be
displayed
if
one
of
these
tests
fails.
A
failure
indicates
a
defective
motor,
motor
driver
PCB
or
harness.
Temporarily
connect
a
spare
motor
to
the
PCU
in
place
of
the
failed
motor
(or
swap
the
azimuth
motor
with
the
pol
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
the
azimuth
and
pol
motor
connections
and
the
pol
motor
test
did
not
fail)
and
rerun
the
BIT
tests.
If
the
test
fails,
replace
the
PCU
and
re
‐
run
the
BIT
tests.
6.4.
Elevation
Motor
Drive
Test.
This
test
checks
the
ability
of
the
motor
driver
to
drive
current
through
the
Elevation
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
EL
MTR”
will
be
displayed
as
the
test
runs.
An
Error
code
4.01
‐
4.17
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
elevation
motor
with
the
azimuth
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
the
elevation
and
azimuth
motor
connections
and
the
azimuth
motor
test
did
not
fail)
and
rerun
the
BIT
tests.
If
the
test
fails,
replace
the
PCU
and
re
‐
run
the
BIT
tests.
Summary of Contents for Coastal
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