Section BXM‐10N‐HE5‐20A
030‐101815 Rev. A
R
14
1402IARA
Figure 18. Clean the Air Intake/Exhaust Screened Holes
remove any debris
from the screened holes
Periodically
4.
MAINTENANCE
The Westell Boxer
r
components are maintenance‐free, how
ever, please note the following item.
S
At least once every six months, periodic inspections should
be performed on the Boxer cabinet to remove any debris
from the fan cover's screened holes (Figure 18). This facili
tates proper operation of the cabinet and allows
unobstructed air flow.
5.
SERVICE AND REPAIRS
Replacing parts is the only recommended type of field repair
for the Westell Boxer
r
cabinet. The list below contains the only
Boxer parts which may be ordered and field‐replaced (see Part
6 for a telephone number, Table 4 for part numbers, and Para
graph 7.2 for the return procedure). See Paragraph 5.1 through
5.4 for detailed steps to remove and replace these parts.
Field‐replaceable parts:
S
Controller Card
S
Internal Fans
S
Door Alarm Sensor Assembly
‐ CAUTION ‐
To avoid electrical shock, turn off any DC or AC power feeds
to the panel before removing or replacing the controller card.
5.1
Replacing the Controller Card
The Controller Card cannot be field
repaired
. Should a prob
lem be suspected with the card, it must be removed and
returned to Westell for service, then re‐installed or
replaced
.
Follow the steps below to replace the controller card.
1.
Disconnect power.
Disconnect power to the card by remov
ing the power Euro‐connector block (labeled “‐48V” and
“GND”. Pull the connector forward.
2.
Remove all connectors.
Disconnect all other wire connec
tions in the card by simply pulling off each Euro‐connector
in the controller card (on the card's left and bottom edges,
see Figure 16) in similar fashion, and labelling each con
nector as it is removed, to facilitate re‐connection with the
replacement card. It is not necessary to remove any wires
from the connectors (unless a fan is suspected of being
faulty and is also being replaced).
3.
Remove card.
Remove the old card by unscrewing the nuts
that secure the card to the cabinet door, then pulling the
card off the studs.
4.
Install new card.
Replace the old card with the new card,
ordered and received from Westell. Be sure the GMT fuse
faces to the left, and that the card labelling is visible and
not upside‐down, align the mounting holes in the card with
the posts on the cabinet door, then tighten the nuts onto
the studs to secure the card. Re‐insert or snap‐on all con
nectors in their proper positions in the card, connecting
the power connector block last.
5.
Test.
Verify the alarms and fans work.
‐ CAUTION ‐
To avoid electrical shock, turn off any DC or AC power feeds
to the controller before beginning this procedure.
5.2
Replacing the “Outside Air” Fans
Fans cannot be field
repaired
but are field replaceable. Should
a problem be suspected with an “outside air” fan, remove the
fan and return it to Westell for service, then replace it. See
Table 4 for ordering information. To remove and replace an
“outside air” fan, proceed with the following instructions.
1.
Remove cover.
Remove the cover for the heat exchanger
compartment by: 1) loosening the Phillip‐head screw loc
ated at the bottom of main door (interior side of door),
then 2) from the outside of the cabinet, lift the cover up off
the two cover alignment posts located at top of the cover.
2.
Open the cabinet.
Open the cabinet door by loosening the
two cup‐washer screws.
3.
Remove fuse.
Remove the 5A fan fuse from the controller
card (see Figure 9 or Figure 16 for fuse location).
4.
Disconnect fan power.
Disconnect the FAN A connector at
the controller card.
5.
Remove wires from connector.
Remove the red and black
wires from the connector. Make a note of which wires (red
or black) were inserted into which holes in the connector.
6.
Replace connector.
Insert the empty connector back into
the controller card.
7.
Pull wires through door.
Remove wires from the ferrite tor
oid, and note the direction the wires are wrapped through
the toroid. Pull the disconnected wires to the fan side
through the hole in door (connector will not fit through
the hole).
8.
Verify fan is off.
Visually check to ensure that the fan
blades are NOT rotating.
9.
Remove bracket.
Loosen and remove the two hex‐nuts on
either side of the front bracket that secures the fans. Re
move the bracket.
