Technical data

LED Indicators
14-Slot Shelf
Chapter 2
99
Power Entry Module (PEM)
WARNING Hazardous Voltage! Before working, ensure that the power is removed from the power
connection cables. When the system is powered on, do NOT touch the power terminals.
Two pluggable redundant Power Entry Modules (PEMs) are located at the rear bottom side of the Shelf. Each
PEM provides power terminals for four 30 A power feeds.
NOTE Although there are fuses in the power entry circuit of the Shelf, the power lines must be
protected on rack level with 30 A breakers.
The power filtering consists of filtered power terminals and a discrete line-filter for each power input. The
input voltage range for the Shelf is from -37 VDC to -72 VDC.
2 No Fan Tray indicators on. 1. Check the Fan Tray for proper seating.
2. Verify that the Fan Tray is installed right side up. The
Extraction Handle be down.
3. Remove Fan Tray and examine the Horizontal Board
Connector on the Fan Tray for bent or broken pins. If
pins are bent or damaged, replace the Fan Tray.
4. Flip the Fan Tray Air Dam on the chassis UP and
examine the Fan Tray connector on the Horizontal
Board for bent or broken pins. If pins are bent or
damaged, replace the Chassis.
5. Replace the Fan Tray.
3 Fan Tray indicates Failure. 1. Check the Fan Tray for proper seating.
2. Remove Fan Tray and examine the Horizontal Board
Connector on the Fan Tray for bent or broken pins. If
Bent or damaged pins are discovered, replace the Fan
Tray.
3. Flip the Fan Tray Air Dam on the chassis UP and
examine the Fan Tray connector on the Horizontal
Board for bent or broken pins. If bent or damaged pins
are discovered, replace the Chassis.
4. Replace the Fan Tray.
4Blue hot-swap LED is
flashing
Fan tray is preparing for hot-swap
5 Blue hot-swap LED is on
solid
Fan tray is ready to be removed (hot-swapped).
Table 2-15 Fan Tray LED Indicator Tips (Continued)
Tip Symptom Action