Table 89: Troubleshooting Pdu Leds - Juniper T4000 Hardware Manual

Table 89: Troubleshooting PDU LEDs

LED Color
Green
INPUT
PRESENT
DC OK Blue
Yellow
OVER TEMP
Related
Documentation
Copyright © 2018, Juniper Networks, Inc.
State Condition
Off The input is not connected,
not receiving voltage or is
under –40 V.
Off The power switch on the
power supply faceplate is
off, the power supply is not
functioning normally, or the
input voltage is not present
or is under –40 V.
Blinking The input is okay, but the
steadily power supply might not be
properly inserted, or there is
a fault (such as insufficient
airflow or faulty output).
On The power supply is shut
down because of excessive
internal tempature.
T4000 Power System Description on page 75
T4000 Six-Input DC Power Supply LEDs on page 77
Maintaining the T4000 Power System on page 338
Replacing a T4000 Six-Input DC Power Supply on page 307
Replacing a T4000 Six-Input DC Power Supply Front Air Filter on page 312
Replacing a T4000 Six-Input DC Power Supply Side Air Filter on page 313
Chapter 36: Troubleshooting Components
Solution
Verify that the customer site circuit breakers
are switched on. If the customer site circuit
breakers are off, switch them on.
Verify that the input is receiving power within
the supported voltage range.
If the customer circuit breakers are switched
on but the input is not receiving power,
switch off the customer site circuit breakers,
and reinstall the DC power source cables.
Verify that the customer site circuit breakers
are switched on, and that the input is receiving
power within the supported voltage range.
If the customer site circuit breakers are off,
switch them on.
If the customer circuit breakers are switched
on but the input is not receiving power,
switch off the customer site circuit breakers,
and reinstall the DC power source cables.
The LED blinks when the power supply is
initializing; but if it continues to blink, verify that
the power supply is installed properly and that
the power supply switch is in the on position.
If the LED continues to blink, replace the power
supply.
Check the power supply fan and air filters to
be sure they are functioning and providing
sufficient airflow through the power supply
and that the power supply is operating within
the specified ambient temperature.
Wait approximately 30 to 60 minutes and turn
on the power supply. If the over temperature
condition persists, replace the power supply.
Use the show chassis environment pem
command to view the temperature.
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