Fan Tray - Nortel Secure Router 4134 Installation — Hardware Components

Figure 2
Secure Router 4134 DC power supply module

Fan tray

The Secure Router 4134 has four fans in the fan tray assembly.
The Secure Router 4134 checks the fan tray for faults every 15 seconds,
and checks the temperature in the chassis every 2 minutes. The fan speed
adjusts based on the chassis temperature. The following table shows the
relationship between chassis temperature and fan speed.
Table 1
Chassis temperature and fan speed
Temperature
Status
Normal Less than 61 degrees Celsius (141.8 degrees
Fahrenheit)
Critical Greater or equivalent to 61 degrees Celsius (141.8
degrees Fahrenheit)
Fault Greater or equivalent to 71 degrees Celsius (159.8
degrees Fahrenheit)
ATTENTION
While the system power is on, fans in the fan tray never completely stop
rotating.
Copyright © 2007, 2008 Nortel Networks
.
Nortel Secure Router 4134
Installation — Hardware Components
NN47263-301 02.01 Standard
18 February 2008
Fan tray 25
Fan speed
39%
90%
100%