User Manual
Table Of Contents
ADCP-75-126 • Issue B • April 2002 • Section 5: Maintenance
Page 5-14
©
2002,
ADC
Telecommunications,
Inc.
5.1 Scheduled Maintenance
Table 5-9
lists
the
items
that
require
regular
maintenance
and
the
recommended
maintenance
interval.
Refer
to
the
section
specified
in
the
table
for
the
required
maintenance
or
test
procedure.
5.2 Remote Unit Cabinet Filter Cleaning Procedure
The
RU
cabinet
filter
cleans
the
RU
intake
air
before
it
enters
the
cabinet.
The
filter
should
be
cleaned
approximately
once
per
year
and
more
often
in
extremely
dirty
environments.
If
the
cabinet
temperature
gradually
rises
over
a
long
period
of
time
and
there
are
no
fan
failures,
it
is
possible
that
the
filter
is
dirty
and
requires
cleaning.
Use
the
following
procedure
to
clean
the
RU
cabinet
filter:
1. Open
the
RU
cabinet
door
as
shown
in
Figure 5-1.
2. Loosen
the
hex
nuts
that
secure
the
left
and
right
filter
brackets
to
the
cabinet
door.
3. Pull
the
filter
upward
and
away
from
the
cabinet
door.
Be
careful
not
to
damage
the
gasket
that
provides
the
air
seal.
Table 5-9. Scheduled Maintenance
INTERVAL ITEM REQUIREMENT
1
month Battery* Check
float
voltage.
Check
system
ambient
temperature.
Check
system
float
current.
6
months Battery* Perform
1
month
scheduled
maintenance
tasks.
Check
individual
battery
terminal
temperature.
Check
individual
battery
float
voltages.
12
months Battery
*
RU
cabinet
filter**
Perform
1
and
6
month
scheduled
maintenance
tasks
Complete
detailed
physical
inspection.
Re-torque
terminal
connections.
Perform
general
system
maintenance.
Perform
cabinet
maintenance.
Remove
and
clean
the
RU
cabinet
filter.
Refer
to
Section
5.2
for
the
required
procedure.
24
months Battery* Perform
1,
6,
and
24
month
scheduled
maintenance
tasks.
Test
battery
system
for
rated
capacity.
60
months HU
Fans
STM
Fan
LPA
Fans
Remove
and
replace
the
cooling
fans
in
the
HU,
STM,
and
LPA.
Refer
to
specified
section
for
the
required
procedures:
HU
see
Section
5.3,
Section
5.4,
and
LPA
see
Section
5.5.
*
Refer
to
the
PRC-SERIES
OPERATING
AND
FIELD
SERVICE
MANUAL
(provided
with
the
back-up
battery
system)
for
the
specified
battery
maintenance
procedures.
**Though
it
is
not
recommended
that
the
RU
be
installed
in
a
salt-air
environment,
if
done
so,
clean
the
cabinet
filter
on
a
monthly
basis
instead
of
on
a
12
month
basis.
In
addition,
the
RU
should
be
inspected
for
corrosion
due
to
salt,
particularly
near
the
fans
and
around
the
connectors.
The
MTBF
of
the
RU
may
be
impacted
if
the
RU
is
exposed
to
salt-air.