Cisco Cisco Packet Data Gateway (PDG)
Troubleshooting
Detecting Faulty Hardware ▀
ASR 5500 System Administration Guide, StarOS Release 17 ▄
175
Checking the LEDs on the PFU
Each PFU has four LEDs along the top edge of its front panel. You must unsnap the top front cover from the chassis to
view these LEDs. Each LED is associated with one of the four -48 VDC power feeds connected to the PFU.
view these LEDs. Each LED is associated with one of the four -48 VDC power feeds connected to the PFU.
Each LED on the PFU should illuminate blue for normal operating conditions.
Figure 9.
PFU LEDs
The possible states for these LEDs are described in the following table. If the LED is not blue, use the troubleshooting
information below to diagnose the problem.
information below to diagnose the problem.
Table 13. PFU LED States
Color
Description
Troubleshooting
Blue
Power feed is supplying -48VDC to
this power plane
this power plane
None needed.
None
PFU is not receiving power to one
or more of its power planes.
or more of its power planes.
Verify that each circuit breaker is in the ON position.
Verify that the RTN and -48VDC lugs are attached properly to the posts on the
upper rear of the chassis.
upper rear of the chassis.
Verify that the ground lug is attached properly.
Use a voltmeter to verify that the power distribution panel is supplying the correct
voltage and sufficient current to the terminals at the rear of the PFU.
voltage and sufficient current to the terminals at the rear of the PFU.
Check the cables from the power source to the rack for continuity.
If a power distribution panel (PDP) is installed between the power distribution
frame (PDF) and the chassis, verify that its circuit breakers are set to ON.
frame (PDF) and the chassis, verify that its circuit breakers are set to ON.
If a PDP is installed between the PDF and the chassis, check the cables from the
PDP to the chassis for continuity.
PDP to the chassis for continuity.
If all of the above suggestions have been verified, then it is likely that the PFU is
not functional. Please contact your service representative.
not functional. Please contact your service representative.