Service manual

Installation and Service Manual393
Section 12
Troubleshooting
Note It may take up to 30 seconds for the 3G modules alarms to clear when
starting up the boards. The boards are operational; however the voltage
sensing alarms can take up to 30 seconds to clear. This length of time to
clear the alarms is due to the fact that the 3G modules are using new
voltage averaging algorithms in the 908 Micro controllers to compare
and verify all voltages.
LEDs
Front panel
Power supplies
Legacy Frames
Display Meaning
POWER/ALARM Red Master alarm for this frame: check internal alarm LEDs
Green Power on, frame OK
Amber
Secondary warning: single fan failure or secondary NR board is active. Check
internal alarm LEDs
Note
Only in the Symmetrical frames.
Off System is not powered
Display Meaning
AC OK Green AC Power OK
Off Supply is not powered (or is not operating)
DC OK Green DC power OK