Juniper EX9214 Hardware Manual page 297

Problem
Description
The power system is not functioning normally.
Cause
Solution
• Check the LEDs on each power supply faceplate.
• If an AC power supply is correctly installed and functioning normally, the AC OK and DC OK LEDs
light steadily, and the PS FAIL LED is not lit.
• If a DC power supply is correctly installed and functioning normally, the PWR OK, BRKR ON, and
INPUT OK LEDs glow steady green.
• Issue the CLI show chassis environment pem command to check the status of installed power supplies. As
shown in the sample output, the value Online in the rows labeled State must indicate that each of the
power supplies is functioning normally.
user@switch> show chassis environment pem
PEM 0 status:
State
Temperature
DC Output
PEM 1 status:
State
Temperature
DC Output
The output is of an EX9208 switch. The output is similar for EX9204 and EX9214 switches.
If a power supply is not functioning normally, perform the following steps to diagnose and correct the
problem:
• If a major alarm condition occurs, issue the show chassis alarms command to determine the source of
the problem.
Online
OK
Voltage(V) Current(A) Power(W) Load(%)
48 12
Online
OK
Voltage(V) Current(A) Power(W) Load(%)
50 12
576 36
600 37
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