Local Alarm Indication (Keypad/Display) - McQuay MicroTech II Operation Manual

Figure 6: Active and Previous Alarm Menu Display
Menu Line
Alarm Name Item Line
Alarm Type Item Line
Alarm Date/Time Item Line

Local Alarm Indication (Keypad/Display)

Alarm information is provided via the unit keypad/display
by four "active" and eight "previous" alarm menus.
Up to four active alarms are displayed in the Active Alarm 1,
Active Alarm 2, Active Alarm 3, and Active Alarm 4 menus.
The highest priority active alarm is displayed in the Active
Alarm 1 menu, the second highest priority active alarm in
the Active Alarm 2, the third highest priority active alarm in
the Active Alarm 3 and the forth highest priority active
alarm in the Active Alarm 4 menu. If it happens that there
are more than four active alarms, the additional alarms do
not appear until one of these four active alarms are cleared.
When an active alarm is cleared the remaining active alarms
are resorted such that the highest priority active alarm
remaining is displayed in Active Alarm 1, the second highest
priority active alarm remaining is displayed in Active Alarm
2 and so forth. Figure 6 shows the typical display of an
active alarm menu. The first line of the display is the menu
line, the second line indicates the alarm name, the third line
indicates the alarm "type" (fault, problem, or warning) and
the forth line indicates the date and time the alarm occurred.
Whenever there is an active alarm, a red alarm LED on the
unit keypad turns on. If there are no active alarms, this LED
remains off.
When an active alarm is cleared, it is stored in the Previous
Alarm 1 menu. Any alarm that might be in the Previous
Alarm 1 menu is moved to the Previous Alarm 2 menu, any
alarm that might be in the Previous Alarm 2 menu is moved
to the Previous Alarm 3 menu and so forth. Any alarm that
might be in the Previous Alarm 8 menu is permanently
remove from the keypad. Figure 6 shows a typical display of
a previous alarm menu. The first line of the display is the
menu line, the second line indicates the alarm name, the third
line indicates the alarm "type" (fault, problem, or warning)
and the forth line indicates the date and time the alarm
occurred.
Displaying Alarms
Active Alarms. When an active alarm exists the red LED
on the keypad is on. The active alarm or alarms can be
viewed as follows:
OM 138
Active Alarm 1
Dirty Filter
Warning-Active
12-Mar-00 04:50:49
1. Pressing the Alarm key while the red LED on the key-
2. Pressing the Right Arrow key changes the display to the
3. Pressing the Left Arrow key changes the display back to
Previous Alarm. When active alarms are cleared, they are
stored in the previous alarm menus. The previous alarm
menus can be viewed as follows:
1. Pressing the Back/Cancel key changes the display to
2. Assuming the blinking cursor is positioned on the Sys-
3. Pressing the Enter/Save key changes the display to the
4. Pressing the Right Arrow key changes the display to the
Previous Alarm 1
Dirty Filter
Warning-Clear
12-Mar-00 05:15:34
pad is on changes the display to the Active Alarm 1
menu.
Active Alarm 2 menu. Pressing the Right Arrow key
again changes the display to the Active Alarm 3 menu.
Pressing the Right Arrow key again changes the display
to the Active Alarm 4 menu.
the Active Alarm 3 menu. Repeating this key two more
times changes the display back to the Active Alarm 1
menu.
back to the main menu if not already there.
tem Summary menu, pressing the Down Arrow (-) key
six times changes the cursor position to the Previous
Alarms menu.
Previous Alarm 1 menu.
Previous Alarm 2 menu. Pressing the Right Arrow key
again changes the display to the Previous Alarm 3
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