Manual 2100-725C
Page
11 of 39
ALARMS
NOTE:
Screenshots shown in this manual reflect
default settings (when applicable).
Acknowledging/Clearing Alarms
Alarm conditions activate a red LED indicator that
backlights the ALARM function key. As an option, an
alarm condition may also be enunciated by an audible
alarm signal. An alarm is acknowledged by pressing
the ALARM key. This calls up alarm display screen(s)
that provide a text message detailing the alarm
condition(s)—as shown in Figure 13.
FIGURE 13
Alarm Screen Breakdown
Alarm Page
Alarm
Date/Time
Alarm Index
Number
Alarm
Description
The MULTI-TEC wall-mount unit alarm index can be
found on page 36.
Clearing Alarms
After an alarm condition has been corrected, the alarm
can be cleared/reset.
To clear alarms, press the ALARM key and the UP or
DOWN keys to scroll to the alarm reset screen (see
Figure 14). Hold down the ALARM key for 3 seconds
until the screen flashes. After the screen flashes, if all
alarms are able to be cleared, the screen should read
NO ALARMS. If there are still active alarms, the screen
will show the first indexed alarm.
FIGURE 14
Clearing Alarms
Alarm Adjustment
Mixed Air Alarm
The mixed air alarm is used to indicate proper
operation of the economizer. An alarm will be generated
when the mixed air temperature is above or below two
independent setpoints.
This alarm can be adjusted by changing the alarm
setpoints and/or delay. The differential low references
the economizer control setpoint. For example, if the
economizer setpoint is 55°F (as shown in Figure 24
on page 17) and the differential is set to 10, the lower
limit for the mixed air alarm would be 45°F. The high
differential references the outdoor air temperature
setpoint that enables the economizer. For example, if
the outdoor air temperature setpoint for economizer
enable is set to 65°F and the high alarm is set to 5,
the alarm would actuate at 70°F. The alarm also has a
delay to help reduce nuisance alarms. With the delay
set to 120 seconds, either the high mixed air or low
FIGURE 15
Clearing Alarm Logs
Clearing Alarm Logs
To clear the alarm logs:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
TECHNICIAN password 1313.
3. Press UP or DOWN keys to scroll to
Settings
; press
ENTER key.
4. Press UP or DOWN keys to scroll to
Initialization
;
press ENTER key.
5. Press UP or DOWN keys to scroll to
Initialization
;
press ENTER key.
6. Press ENTER key to scroll to
Delete alarm logs?
(see Figure 15).
7. Press UP or DOWN key to change from
NO
to
YES
.
8. Press ENTER key to clear all alarm logs.
