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Replacing a Power Supply
The appliance will support two power supplies, supplying hotpluggable power redundancy. The system
distributes the power load across both power supplies to maximize efficiency. When a power supply is
removed with the system powered on, the full power load is picked up by the remaining power supply.
Note
The system ships with just one power supply and you have the option to purchase the
additional power supply (Ordering Part No. 30522 WS-PSI-C5215-750W-01).
Note
The system requires one power supply to operate the system normally. Remove and replace
only one power supply at a time in a system that is powered on.
Each power supply has a single bi-color LED to indicate power supply status.
Table 4: Power Supply Status LED Indicator Patterns
Power Supply Condition
Output on and OK
No AC power to all power supplies
AC present / Only 12VSB on (PS off) or PS in cold
redundant state
AC power cord unplugged or AC power lost. With a 2nd
PS in parallel still with AC input power
Power supply warning events where PS continues to
operate — high temp, high power, high current, slow fan
Power supply critical event causing a shutdown, failure,
OCP, OVP, fan fail
Power supply firmware updating
ExtremeCloud™ Appliance E2120
LED Pattern
Green
Off
1Hz Blinking Green
Amber
1Hz Blinking Amber
Amber
2Hz Blinking Green
Hardware Installation
10
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