Manual 2100-670B
Page
27 of 33
Supply Temperature Sensor Failure Alarm
When the sensor reads a value that is outside of the
acceptable -41.0 to 303.0° range, an alarm will be
generated indicating the sensor has failed.
This alarm is fixed and cannot be adjusted.
Alarm index numbers: 145, 146, 147, 148
High Supply Air Temperature Alarm
When the supply air temperature measurement is above
the outdoor air temperature setpoint (70°F) for the
economizer to be enabled for 120 seconds, an alarm
will be generated and the economizer will be disabled
until the cooling call has been removed. This alarm will
automatically reset once the economizer is no longer
disabled.
Alarm index numbers: 14, 33, 48, 63
To change the high supply air temperature alarm:
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
(A5)
; press ENTER key.
5. Press ENTER key to scroll to
Hi and Diff
value (see
Figure 40 on page 28).
6. Press UP or DOWN keys to change the differential
to the desired value.
7. Press ENTER key to save and scroll to the next
parameter.
FIGURE 38
Outdoor Humidity Sensor
Outdoor Temperature Sensor Failure Alarm
When the sensor reads a value that is outside of the
acceptable -41 to 303.0° range, an alarm will be
generated indicating the sensor has failed. This alarm
condition will disable the economizer.
This alarm is fixed and cannot be adjusted.
Alarm index numbers: 11, 30, 45, 60
Outdoor Humidity Sensor Failure Alarm
When the sensor reads a value that is outside of the
acceptable 0 to 100% RH range, an alarm will be
generated indicating the sensor has failed. This alarm
condition will disable the economizer when the mode is
set to temperature and humidity or enthalpy.
This alarm is fixed and cannot be adjusted.
Alarm index numbers: 13, 32, 47, 62
Supply Temperature Sensor
The unit is equipped with a supply air temperature
sensor to monitor the leaving air temperature of the
unit. The temperature is measured with a 10k ohm
NTC thermistor.
The supply air 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
Supply Air
Sensor (C6)
; press ENTER key.
5. Reference the
Value
to see the input of the sensor
(see Figure 39).
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.
FIGURE 39
Supply Air Sensor
