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Replacing a Fan
This document describes how to replace a faulted fan in a Dell S4048-ON network
switch.
Location and description of the fan modules
The S4048-ON contains three fan modules. Module slot 1 is on the left side of the
chassis, module slot 2 is in the middle of the chassis, and module slot 3 is on the right
side of the chassis.
The fan speed increases when the internal temperature reaches 161.6°F (72°C) and
decreases to normal speed when the temperature falls to 136.4°F (58°C). The
S3048-ON never intentionally turns off the fans.
Figure 18 S4048–ON fan modules
1. Fan modules
Fan module status indicator
Each fan module has a bi-color (green and amber) LED to indicate fan module
operating status.
Figure 19
Fan module LED location
1. Fan module 1 LED
2. Fan module 2 LED
3. Fan module 3 LED
Table 18
Fan module LED behavior
Fan Module Condition LED State
No fault Green
Fault Amber
Dell S4048-ON Switch FRUs
DELL EMC CONFIDENTIAL
Replacing a Fan 71
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