Juniper PTX5000 Hardware Manual page 577

Table 95: Troubleshooting PDU LEDs (continued)
LED State
on the Off
SW ON
60-A DC PDU
on the Off
CB ON
120-A DC PDU,
delta AC PDU, or
wye AC PDU
on the Red
PDU OK
60-a DC PDU,
120-a DC PDU,
High Capacity
DC PDU, delta
AC PDU, and
wye AC PDU
Off
Copyright © 2017, Juniper Networks, Inc.
Condition
The LED might be off for one of the
following reasons:
The input power switches are off.
The host subsystem detected a
problem and turned off the input
power switches.
The input is not receiving any
voltage.
The LED might be off for one of the
following reasons:
The circuit breakers on the 120-A DC
PDUare off.
The circuit breaker on a delta AC
PDU or wye AC PDU is off.
The input is not receiving any
voltage.
The host subsystem detected a
problem and turned off one or more
circuit breakers.
The PDU has failed.
An electronic fuse might have tripped
or failed.
The LED might be off for one of the
following reasons:
The PDU is starting.
The PDU is not receiving input
voltage.
The circuit breakers on the 120-A DC
PDU might be off.
The circuit breaker on the
three-phase delta AC PDU or
three-phase wye AC PDU might be
off.
The input power switches on the
60-A DC PDU might be off.
Chapter 37: Troubleshooting Components
Solution
1. Verify that the input power switches on the
60-A DC PDU are switched to the on position
( ) .
|
2. If the input power switches on the 60-A DC
PDU are switched to the on position (
that the voltage is above –40 V.
1. Verify that the circuit breaker on the PDU are
switched to the ON position (
2. Verify that the PDU is receiving input voltage
within the supported range.
For the 120-A DC PDU, verify that the input
voltage is above –40 V.
For the three-phase delta AC PDU or
three-phase wye AC PDU, input voltage is
not present, or is under –100 V.
1. Verify that the fan trays in the power supply
modules are operating and that no red alarm
condition exits.
2. Check all air filters to be sure they are
functioning and providing sufficient airflow
through the chassis.
3. Issue the
show chassis environment pdu
command to determine the cause of the
problem.
1. Connect the PDU to a different power source
with a new DC power cable or AC power cord.
2. If the PDU OK LED still does not light, the PDU
might be the source of the problem. Replace
the PDU with a spare.
If the LED on the installed spare is lit
PDU OK
green, the PDU that was replaced might be
faulty. To return it for replacement, see
"Contacting Customer Support to Obtain
Return Material Authorization" on page
| ), verify
| ) .
555.
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