Allied Telesis AT-SBx81CFC960 - Manual (Page 34)

Chapter 1: Chassis and Power Supplies
34 Section I: Hardware Overview
AT-SBxFAN12 Module
The AT-SBxFAN12 Module, shown in Figure 12, is the cooling unit for the
chassis. It is a field- replaceable assembly that is factory installed and
shipped with the AT-SBx8112 Chassis.
The module is controlled by the AT-SBx81CFC960 Controller Fabric Card.
The fan speeds are automatically adjusted according to the internal
operating temperature of the switch. The fans are at their lowest speed
when the ambient temperature coming into the fan is approximately 20° C.
The fan speeds increase to provide additional cooling as the ambient
temperature rises.
Figure 12. AT-SBxFAN12 Module
Note
Only an authorized service technician should replace the fan
module.
LED The POWER LED on the AT-SBxFAN12 Module is described in Table 4.
Table 4. AT-SBxFAN12 Module LED
LED State Description
Power
Solid Green The AT-SBxFAN12 Module is receiving
power.
OFF The AT-SBxFAN12 Module is not receiving
power or has failed.