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Rear Panel
Fans
Power Supply
© Copyright 2015 Lenovo
For cooling, the rear panel of the G8052 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 four fans, the switch reports the condition, the other
fans continue to run, and the switch continues to operate normally. You can replace
the 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.
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).
Fan LEDs
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.
The rear panel of the G8052 has two bays for hot-swap power supply modules.
Each power supply module has an individual IEC 320 C14 power connector. The
power cord attaches to a universal grounded AC power source.
Statement 5
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
Chapter 2: Switch Components
25
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