Page
28 of 53
OPERATION
Unit On/Off
The wall unit can be turned on and off from the
TEC-EYE
TM
. Turning the unit off with the following
instructions will disable heating and cooling operation
but may not disable the blower. The blower may
continue to run if the unit or the LV1000 have the
continuous blower option enabled.
NOTE:
Blower will run if the unit is in stand alone
mode.
To turn the unit on or off:
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
On/Off
; press
ENTER key.
4. Press UP or DOWN keys to change value from On
to Off or from Off to On.
5. Press ESCAPE key several times to return to Main
Menu screen.
The wall unit may also be turned off by certain alarms
such as the smoke alarm input on the wall unit board
or the return air temperature sensor failure when not
connected to the LV1000.
Alarm Adjustment
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).
After an alarm condition is corrected, the alarm can be
cleared by pressing the ALARM key for 3 seconds.
To clear all alarms, navigate to the end of the alarm list
to the screen shown in Figure 2.4.
Stand Alone Mode
See
PRELIMINARY START UP
on page 20.
Temperature/Humidity Control
Temperature/Humidity Control Components
Return Air Temperature Sensor
The unit is equipped with a return air temperature
sensor to monitor the space temperature when the unit
is in stand alone mode. The return air sensor is located
in the upper part of the return opening in such a way
that it is exposed to the entering airstream. An alarm
signal will be sent to the LV controller if the return air
temperature sensor is disconnected. The temperature is
measured with a 10k ohm NTC thermistor.
This sensor can be verified and adjusted by:
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
I/O Config
;
press ENTER key.
4. Press UP or DOWN keys to scroll to
Return Air
Sensor (C5)
; press ENTER key.
5. Verify the measurement displayed on screen is
accurate (see Figure 2.5).
6. If the measurement needs to be adjusted, apply
an offset value by pressing ENTER to to scroll to
Offset
.
7. Press UP or DOWN keys to adjust the offset.
8. The update will not take effect until the cursor is
moved out of the
Offset
parameter.
9. Once adjusted, press the ESCAPE key several
times to return to Main Menu screen.
FIGURE 2.4
Clearing All Alarms
FIGURE 2.5
Adjusting Return Air Sensor
