Table of Contents
Advertisement
Rear Panel
Fans
Fan LEDs
26
NE0152T Installation Guide
The rear panel is composed of the following components.
For cooling, the rear panel of the NE0152T has three bays for hot-swap fan modules.
Three fan modules are required for redundancy. When three fan modules are used,
if there is a failure of one of the fans, the switch reports the condition, the other fans
continue to run, and the switch continues to operate normally.
You can replace one failed hot-swap fan module while the switch is operating. If a
second fan fails, the switch reports the condition and shuts down to prevent
overheating.
CAUTION:
Be sure to finish the replacement procedure promptly. The switch could overheat
if left without cooling for an extended period.
Compatible fan options are listed in the
Fan operation and internal temperatures are monitored. If the air temperature
exceeds a desired threshold, the environmental monitor displays warnings.
Note: If a fan fails, the maximum operating temperature drops from +40°C (104°F)
to +35°C (95°F).
If there is a failure of one or more fans, the front panel Fan LED flash.
Additional Fan LED indicators are located on the rear panel of the switch, on the
individual fan modules.
The following table describes the fan module LED behavior.
Table 6.
Fan module status LED behavior
LED State
Functional Meaning
On
Fan is on and operational.
Off
Fan module has no power.
Flashing
Fan speed failure. Replace the fan module.
Lenovo Networking
Catalog.
Advertisement
Table of Contents
