Cooling Unit Module Replacement; Removing The Cooling Unit Module; Figure 6-3 Cooling Unit Module And Cooling Unit Failure Indicator - Hatteras HN4000 Hardware Installation Manual

6.2

Cooling Unit Module Replacement

Figure 6‐3 shows the HN4000 switch's Fan Cooling Unit module and the Cooling Unit failure
indicator.
Figure 6-3 Cooling Unit Module and Cooling Unit Failure Indicator
The Cooling Unit must be replaced if the Cooling Unit failure indicator is "on." In addition,
the Cooling Unit should be removed at regular intervals to inspect and clean (or replace)
the unit's filter.
Removal and replacement of the Cooling Unit can be performed while the HN4000 is powered up,
without affecting data or management traffic. However, the replacement operation must be com-
pleted in two minutes or less to avoid over heating of the HN4000.
Caution

6.2.1 Removing the Cooling Unit Module

#1 Phillip's screwdriver.
Tools
Take the following steps to remove the Cooling Unit module.
Step 1. Read the removal procedures to determine if the 2 minute time interval for hot‐
replacement can be accomplished. If you are going to replace the module's filter ele‐
ment, have a replacement element available.
Step 2. Loosen the two mounting screws that secure the module.
920550-5020 Rev 14
Cooling Unit Module Replacement
HN4000 Hardware Installation Guide
6-5