Nautel XR12, Troubleshooting Manual, Page: 24 / 283

XR12 Troubleshooting Manual Responding to alarms
Page 1-4 Issue 3.0 2009-07-28
Identifying an alarm
The best way to identify an alarm is by viewing the transmitter’s front panel. There are several ways to
use the front panel to identify the occurrence and origin of a fault:
• The system diagram ( Figure 1.1 ) is a flow diagram that indicates the operational status of
various sections of the transmitter. If a lamp is on (red), a fault is occurring in the associated
section of the transmitter.
Figure 1.1: System Diagram
• The diagnostic display's meter screen has real-time meter indications (e.g., forward power) to
assist in fault analysis.
• If an alarm occurs, a
Status
option appear’s on the diagnostic display. Press the
Status
soft
key to display all active faults.
• The diagnostic display's
Events Log
(see page 3-1 of the Operating and Maintenance Manual )
provides a chronological list of faults and events to assist in fault diagnosis.
1. Determine the origin of the fault by noting which of the system diagram's lamps has
turned on.
2. Attempt to clear the alarm from the
Status
screen by pressing the
Reset
button. If the alarm
persists, it will not be cleared from the display.
IPA/
PA
Exciter
Output
Network
Low Voltage
Power Supply
AC Mains Power Supply
Changeover
External
Alarm