Appendix B: Led Flash States And Wiring Diagrams; Led Flash States - IBM 5500 Operational, Installation, And Maintenance Manual

Appendix B: LED Flash States and Wiring Diagrams

LED Flash States

Test LED
On Off
Off On
Off Off
Blinking Blinking
On On
Off Off
Off Blinking number
This section contains the LED (light-emitting diode) flash sequence informa-
tion and wiring diagrams for the 5500 Express IP Control Unit.
The power light indicates power is available to the unit. Use the AC power
cord to control the power.
The ready light indicates communications are established and the unit is ready
for operation.
The test light indicates the unit is performing diagnostic testing of the compo-
nents and system. Table 80, "LED Flash States -Normal Operation" provides
information about the status of the ready and test LEDs.
Figure 80: LED Flash States -Normal Operation
Ready LED System Beep
None
None
None
None
None
Every 5 seconds
None
Appendix B: LED Flash States and Wiring Diagrams
Diagnostics or configuration in
progress
System is operational
Shutdown or powering-up in
progress
Remove the diskette; press Start/
Stop button to restart
Shutdown request recognized
Shutdown complete, safe to power
off
Confirm operation number with
button, see Table 82, "LED States
While Using Utility Diskette"
Status
Appendix B 159