Technical data

LED Indicators
14-Slot Shelf
Chapter 2
83
Figure 2-2 Alarm Display Panel
The LEDs USER (1, 2, 3) are user definable and connected to the I²C-bus I/O port of the PCA 9555 on the
ADP.
Troubleshooting the Shelf Alarm Display Panel
The Shelf Alarm Display Panel has a low failure rate. Any indication displayed is being reported by some
other electrical subsystem
Table 2-3 Shelf Alarm Display Panel LED Indicators
Critical
Alarm
(Red)
Major
Alarm
(Amber
)
Minor
Alarm
(Yellow
)
Fan
Tray
Alarm
(Red)
Fan
Tray
OK
(Green)
User
LED 1
(Red)
User
LED 2
(Green)
User
LED 3
(Amber
)
Tip
Off Off Off Off Green Off Off Off Normal
Red Amber Yellow Red Green Red Green Amber 1