Manual 2100-695C
Page
33 of 56
Damper Failed to Close Alarm
When the controller commands the economizer damper
actuator to the 0% position and the damper switch
indicates the damper is not closed, after a delay of 300
seconds the controller will generate a damper failed
to close alarm. This alarm will disable all functions of
the unit and the status message will display "Off by
Alarm". If the condition is remedied, the alarm will
automatically reset and the unit will resume normal
operation.
Disabling the damper switch in
I/O Config
disables this
alarm.
To adjust the damper failed to close delay:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
USER password 2000.
3. Press UP or DOWN keys to scroll to
System Config
;
press ENTER key.
4. Press UP or DOWN keys to scroll to
Alarm Setup
A4
.
5. Press ENTER key to scroll to
Close Delay
(see
Figure 52).
6. Press UP or DOWN keys to change to the desired
value.
7. Press ENTER key to save the value.
Outdoor Temperature and Humidity Combination
Sensor
The unit is equipped with a combination outdoor
temperature and humidity sensor to monitor
outdoor conditions for the economizer operation.
The temperature is measured with a 10k ohm NTC
thermistor. The humidity is measured with a humidity
sensor that outputs a 4-20mA signal to the controller.
Troubleshooting information for this sensor is included
in the Troubleshooting section of this manual.
The outdoor temperature can be verified by:
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
I/O Config
;
press ENTER key.
4. Press UP or DOWN keys to scroll to
Outdoor Air
Sensor C3
.
5. Reference the
Value
to see the input of the sensor
(see Figure 53).
6. To apply an offset, press ENTER key to scroll to
Offset
.
7. Press UP or DOWN keys to change to the desired
value.
8. Press ENTER key to save the value.
Damper Failed to Open Alarm
When the controller commands the economizer damper
actuator to a position other than 0% and the damper
switch indicates the damper is not open, after a delay
of 20 seconds the controller will generate a damper
failed to open alarm. This alarm is just a notification
and will not disable any features on the controller.
Disabling the damper switch in
I/O Config
disables this
alarm.
To adjust the damper failed to open delay:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
USER password 2000.
3. Press UP or DOWN keys to scroll to
System Config
;
press ENTER key.
4. Press UP or DOWN keys to scroll to
Alarm Setup
A4
.
5. Press ENTER key to scroll to
Open Delay
(see
Figure 52).
6. Press UP or DOWN keys to change to the desired
value.
7. Press ENTER key to save the value.
FIGURE 51
Damper Switch
FIGURE 52
Adjusting Damper Alarm Delay
