Section BXM‐161‐4HE‐20A
030‐101374 Rev. A
R
16
1211IARA
of the inside surface of the door, see Figure 3) with a Phil
lips screwdriver.
3.
Remove fuse.
Remove the 3A fan fuse from the controller
card (see Figure 13 or Figure 20 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 removed FAN A connector. Label or 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 access hole in door.
Loosen the liquid
tight fitting on the inside of the door (near the top) which
secures the fans' wires in place; pull the disconnected
wires to the fan side through the hole in the door (the con
nector 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 nuts on ei
ther side of the front bracket that secures the fans (see
Figure 23). Remove the bracket.
10.
Remove fans.
Lift the old faulty fan off the mounting studs.
11.
Store bracket.
Replace the bracket and thread the nuts
back onto their posts.
12.
Return fans.
Return the fan(s) to Westell for repair or re
placement (see Paragraph 7.2).
13.
Install replacement fan(s).
Mount the replacement fan(s)
onto their mounting studs and reverse the steps above, and
also read the note below to secure the fan(s) and make
wire connections. Re‐insert the connector back into the
controller card.
‐ FAN WIRING IN EURO‐CONNECTOR NOTE ‐
One euro‐connector serves two fans: there is one connector for
the two external air fans (connector labeled “FAN A”) and one
connector for the two internal air fans (“FAN B”). Each fan has
a black wire and a red wire. When wiring a new or replacement
fan, the same colored wire from each fan should first be twisted
together as a single wire unit prior to insertion into its proper
termination hole in the connector.
14.
Apply power and test.
If not already installed, re‐install the
fuse in the controller card, and apply power to the cabinet.
Verify the fans are working properly.
5.3
Replacing the “Inside Air” Fans
Fans cannot be field
repaired
. Should a problem be suspected
with an “inside air” fan, remove the fan and return it to Westell
for service, then
replace
it. See Table 4 for ordering informa
tion. To remove and replace an “inside air” fan, proceed with
the following instructions.
Figure 23. Field Replacement of Fans
Inside-air fans
Wired to FAN B connector
Loosen
remove
nuts to
fans
Loosen
to remove
nuts
fans
Outside-air fans
Wired to FAN A
connector in
Controller Card
in Controller Card
(2 wires for each fan,
join same-colored wires together
from each fan prior to insertion
into connector in controller card)
Inside-
Outside-air
air
fans
fans
‐ CAUTION ‐
To avoid electrical shock, turn off any DC or AC power feeds
to the controller before beginning this procedure.
1.
Open the cabinet.
Open the cabinet door by loosening the
cup‐washer screw with a 216 tool or can wrench and turn
ing the door handle (see Figure 4).
2.
Remove fuse.
Remove the 3A fan fuse from the controller
card (see Figure 13 or Figure 20 for fuse location).
3.
Disconnect fan power.
Disconnect the FAN B connector at
the controller card.
4.
Remove wires from connector.
Remove the red and black
wires from the connector. Label or make a note of which
wires (red or black) were inserted into which holes in the
connector.
5.
Replace connector.
Insert the empty connector back into
the controller card.
6.
Verify fan is off.
Visually check to ensure that the fan
blades are NOT rotating.
7.
Remove fan mounting screws.
Remove the screws that se
cure the fans to the inside of the cabinet door (see
Figure 23).
8.
Remove fans.
Lift the old fans off their mounting studs.
9.
Store screws.
Replace the screws back into their holes.
10.
Return fans.
Return the fan(s) to Westell for repair or re
placement (see Paragraph 7.2).
11.
Install replacement fan(s).
Mount the replacement fan(s)
onto their mounting studs and reverse the steps above, and
also read the note below to secure the fan(s) and make
wire connections. Re‐insert the connector back into the
controller card.