T-372
4–2
The display module (see
) consists of two 5-digit displays and seven indicator lights. Descriptions of the
indicator lights are provided in
. The keypad (see
) consists of eleven push button switches
that act as the user’s interface with the controller. Descriptions of the switch functions are provided in
Figure 4.2 Display Module
Figure 4.3 Keypad
Table 4–1 Display Module LEDs
Light
Function
COOL
(White / Blue)
Energized when the refrigerant compres
-
sor is energized.
HEAT
(Orange)
Energized to indicate heater operation in
heat mode, defrost mode, or dehumidifica
-
tion.
DEFROST
(Orange)
Energized when the unit is in defrost mode.
IN RANGE
(Green)
Energized when the controlled tempera
-
ture probe is within specified tolerance of
setpoint. The controlling probe in perish
-
able range is the SUPPLY air probe and in
frozen range is the RETURN air probe.
ALARM
(Red)
Energized when an active or inactive shut
-
down alarm is in the alarm queue.
SUPPLY
(Yellow)
Energized when the supply air probe is
used for control. When this LED is illumi
-
nated, the temperature displayed in the
AIR TEMPERATURE display is the read
-
ing at the supply air probe. This LED will
flash if dehumidification or humidification is
enabled.
RETURN
(Yellow)
Energized when the return air probe is
used for control. When this LED is illumi
-
nated, the temperature displayed in the
AIR TEMPERATURE display is the read
-
ing at the return air probe.
Table 4–2 Keypad Function
Key
Function
CODE
SELECT
Access function codes.
PRE TRIP Display Pre-Trip selection menu.
Discontinue pre-trip in progress.
ALARM LIST Display alarm list and clear alarm queue.
MANUAL
DEFROST /
INTERVAL
Display selected defrost mode. Press and
hold this key for five seconds to initiate de
-
frost using same logic as if the optional man
-
ual defrost switch was toggled on.
ENTER
Confirm a selection or save a selection to the
controller.
Arrow Up
Change or scroll a selection up. Pre-trip ad
-
vance or test interrupt.
Arrow Down Change or scroll selection down. Pre-trip re
-
peat backward.
RETURN /
SUPPLY
Display non-controlling probe temperature
(momentary display).
°C / °F
Display alternate english / metric scale (mo
-
mentary display). When set to F, pressure is
displayed in psig and vacuum in “/hg.” “P” ap
-
pears after the value to indicate psig and “i”
appears for inches of mercury. When set to
C, pressure readings are in bars. “b” appears
after the value to indicate bars.
BATTERY
POWER
Initiate battery backup mode to allow set
-
point & function code selection if AC power is
not connected.
ALT MODE Access DataCORDER configuration vari
-
ables, function codes and stored tempera
-
tures. Access a USB software loading menu
and a wireless setup menu.
CODE
SELECT
PRE
TRIP
ALARM
LIST
MANUAL
DEFROST/
INTERVAL
ENTER
BATTERY
POWER
ALT
MODE
RETURN
SUPPLY
C
F
