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180 Chapter 8 Install or Replace a Cooling Fan
P0993133 03
Troubleshooting Fans
There are three LEDs on the front of the Business Communications Manager base function tray
and one on the front of the expansion unit used to assess fan function. Table 23 describes the
possible states of the fan and temperature LEDs.
Remove a BCM400 cooling fan
Use this procedure to remove the cooling fan(s) in a BCM400 standard or redundant feature option
(RFO) platform configuration. The standard Business Communications Manager platform base
chassis has one fan. The BCM400 RFO version has two fans.
Before you shut down the system, determine if a fan (in the redundant version) has failed. Refer to
Table 23.
1 If you still have access to the Unified Manager, shut down the system using the Shutdown
command. For details refer to “Shut down the system software” on page 145. Otherwise, skip
to the next step.
2 Set up the Business Communications Manager for maintenance, as described in “Shut down
the system hardware” on page 146.
3 Disconnect the Business Communications Manager system from the AC power outlet.
4 Attach one end of the grounding strap to your wrist and the other end to a grounded metal
surface.
5 Remove the fan access panel at the rear of the platform base chassis (see Figure 105):
a Remove the fan access panel screws at the top and bottom of the panel. Place the screws in
a safe location.
b Tip the top of the fan access panel toward you.
c Grasp the fan access panel with both hands and lift the away from the platform base
chassis. Do not stretch the fan cable(s).
Table 23 Fan and temperature LEDs on the base function tray
LED Label Description Green LED On Red LED On (Only)
Temperature Temperature is below threshold. Temperature is in alarm status.
Possible fan(s) failure.
Fans All installed fans are working There is a problem with a minimum of
one fan.
Power All components are working Component failure
Warning: Protect the hardware components against damage from electro-static
discharge. Always wear a ground wriststrap before you handle components. Always place
the components in static-free container.