Local Operation
3-18 M370046-01
Alarms and Errors
Several conditions can cause alarms in the XTR. Some conditions are:
From user configurable features.
Controlled in hardware and will trigger regardless of configuration.
All alarms, with the exception of the Fan alarm, will result in the output of
the power supply being disabled. The Fan alarm does not affect the output.
When an alarm is triggered, the appropriate alarm message will begin
blinking on the display and the Alarm LED will be illuminated.It is
possible that more than one alarm will trigger at the same time. When this
occurs, the alarm with the highest precedence will blink on the display.
Table 3-4 lists the precedence of alarms. If the alarm is cleared and the
event which caused the alarm has not been corrected, then the alarm may
trigger again immediately. Fix the reason for the alarm before you clear it.
Table 3-4
Alarm Order of Precedence
Alarm Precedence Output
Latch
Maskable Display
AC Fail 1 (Highest) Yes No AC Fail
Over Temperature Protection (OTP) 2Yes Yes O7P Pro
Fan 4No Yes FAn Pro
Interlock 6No No In Loc
Over Voltage Protection (OVP) 7Always No OVP Pro
Over Current Protection (OCP) 8Always No OCP pro
Foldback 9Yes Yes FLD Pro
External Shutdown 10 No Yes SD POL
Under Voltage Protection (UVP) 11 (Lowes t) No Ye s UUP Pro
Flash Checksum Failure1
1.The Flash Checksum Failure alarms are an exception as they are a terminal alarm that can only
occur during boot up. It can only be cleared by doing a soft reset (losing the configuration of the
unit) or by power cycling the unit.
N/A N/A N/A FLA FAIL