Chapter 2 TROUBLESHOOTING
2-8 NWA-033627-001 Rev.4.0
95ch2001.fm
FAULT DETECTION
FAULT DETECTION
This section describes the way in which alarm indications are given. If a fault has occurred in the system,
you can detect the fault via the routes shown in “Alarm Indication Routes”.
Alarm Indication Routes
(1) Fault Detection by Alarm Indication
When a fault has occurred in the system, you can detect the fault by a Major (MJ) alarm or Minor
(MN) alarm indicated PCPro or external Alarm Display Panel.
(2) Fault Detection by LED Indication on Blades
When a fault has occurred in the system, you can also detect the fault by LED indication on blades.
“LED Indication on Blades” shows the alarm indication LEDs on each blade. Page 2-9
For details of LED indication on blades, refer to the System Hardware Manual.
(3) Fault Detection by Complaint from Station User or Operator
When you receive a complaint about a problem from a station user or an operator, you should collect
as much information on the problem as possible, and then troubleshoot the problem according to the
procedure shown in “Troubleshooting by Contents of Complaint” of this chapter. Page 2-37
LED INDICATION
BLADE
MAINTENANCE
PERSONNEL
COMPLAINT FROM
STATION USER OR OPERATOR
PWR MJ MN
ALARM DISPLAY PANEL
MJ/MN ALARM
INDICATION
JULY/17/2009
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