Fan Module - ZyXEL Communications OLT2406 User Manual

1.8 Fan Module

The following figure shows the OLT chassis fan module's front panel.
Figure 10 Fan Module
This table describes the LEDs on the front panel of fan module .
Table 11 Fan Module LED Descriptions
LED COLOR
PWR Green
ALM Red
The fan module monitors to detect whether the fans are operating in the normal state and relays the
information to the OLT's management switching card.
The fan module is hot-swappable. Replace the entire fan module if cleaning the fan filter does not solve
the problem. Return any malfunctioning fan modules to the manufacturer. Removing the fan module or
fan RPMs, temperature, or voltage values outside of the accepted threshold triggers a critical alarm and
turns on the management switching card's Alarm LED.
The OLT automatically adjusts the rotation speed of the fans based on the detected temperature. You
can also manually set the high and low fan speed limits for raising an alarm on a specific fan. The
following table covers how the OLT automatically adjusts the rotation speed of the fans based on the
detected temperature. See
110.1 on page 741
Chapter 1 System Introduction
STATUS DESCRIPTION
On The fan module is powered on.
Off The fan module is powered off or has failed.
On The fan module is not working normally.
Off The fan module is working normally.
Section 52.7 on page 402
for fan module specifications.
OLT2406 User's Guide
for how to display the fan speed. See
42
Section