Juniper PTX5000 Hardware Manual page 618

Table 89: Troubleshooting PDU LEDs
LED State
CB ON on the Off
120-A DC PDU,
delta AC PDU,
or wye AC PDU
PDU OK on the Red
60-a DC PDU,
120-a DC PDU,
High Capacity
DC PDU, delta
AC PDU, and
wye AC PDU
(Continued)
Condition
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.
Solution
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.
show chassis environment pdu
3. Issue the
to determine the cause of the problem.
600
command