Rear Panel; Fans - Lenovo RackSwitch G8264 Installation Manual

Rear Panel

Fans

Fan LEDs
26
G8264 Installation Guide
For cooling, the rear panel of the G8264 has four bays for hot‐swap fan modules.
Four fan modules are required for redundancy. When four 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.
Compatible fan options are listed in the Lenovo Networking Catalog.
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 flashes.
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 7.
Fan module status LED behavior
LED State Functional Meaning
On Fan is operational
Off Fan module has no power.
Flashing Fan speed has failed. Replace the fan module.