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CHAPTER 6: FANS
The switch comes from the factory with three integrated fans installed in the chassis.
Normal—airflow is from the I/O panel to the PSU.
All fans and PSUs in a configuration must be in the same airflow direction.
Environmental factors can decrease the amount of time required between fan replacements. Check the environmental factors
regularly. An increase in temperature and/or particulate matter in the air might affect performance; for example, new equipment
installation.
CAUTION: Check the fans at six-month intervals and replace them as necessary. Regularly monitor the speeds of the fans to
accurately determine replacement intervals.
6.1 COMPONENTS
The following are the EMS10G12 fan components.
• EMS10G12 Fan module
• EMS10G12 Fan module—Reverse flow
1
+1
+2
+3
FIGURE 6-1. FAN MODULES
FAN LEDs
Solid green: Fan function is normal.
Flashing yellow: There is a fan fault.
Off: Fan is off.