S8901-54XC Hardware Installation Guide | 21
PSU FRU LED
Additional information about PSU status can be obtained by the LEDs located on the PSU itself.
LED Condition
Equipment Status
Off
No input power to all power supplies.
Green
Output ON and OK
Blinking Green (1/sec) PSU standby state input power present / Only +5VSB on.
Blinking Green (2/sec)
Power supply firmware updating (Boot-loader mode).
Red
Power supply critical event causing a shutdown, failure, over current,
short circuit, over voltage, fan failure, and/or over temperature.
Blinking Red (1/sec)
DC power cord unplugged or DC power lost with a second power supply
in parallel still with DC input power.
Power supply DC present, 5VSB and 12V off via on/off control from
system.
Blinking between
Green and Red
Power supply warning events where the power supply continues to
operate; high temp, high power, high current, and/or slow fan.
Fan FRU LED
LED Condition
Equipment Status
Off
No input power
Solid Green
Fan is functioning normal
Blinking Amber
Fan is abnormal, service is required
Management Port LED
LED Condition
Equipment Status
Left LED
Off
No power
Solid Green
1G link-up
Blinking Green
1G TX/RX activity
Right LED
Off
No power
Solid Amber
10M/100M link-up
Blinking Amber
10M/100M TX/RX activity
