T-362 4–2
The display module consists of two 5-digit displays and seven indicator lights. The indicator lights are described in
Table 4–1. The keypad consists of eleven push button switches that act as the user’s interface with the controller.
The switch functions are described in Table 4–2.
Table 4–1 Display Module LEDs
Light Function
COOL (White / Blue) Energized when the refrigerant compressor is energized.
HEAT (Orange) Energized to indicate heater operation in heat mode, defrost mode, or
dehumidification.
DEFROST (Orange) Energized when the unit is in defrost mode.
IN RANGE (Green) Energized when the controlled temperature probe is within specified tolerance of
setpoint. The controlling probe in perishable range is the SUPPLY air probe and in
frozen range is the RETURN air probe.
SUPPLY (Yellow) Energized when the supply air probe is used for control. When this LED is
illuminated, the temperature displayed in the AIR TEMPERATURE display is the
reading 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
illuminated, the temperature displayed in the AIR TEMPERATURE display is the
reading at the return air probe.
ALARM (Red) Energized when an active or inactive shutdown alarm is in the alarm queue.
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
defrost using same logic as if the optional manual 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 advance or test interrupt.
Arrow Down Change or scroll selection down. Pre-trip repeat backward.
RETURN / SUPPLY Display non-controlling probe temperature (momentary display).
°C / °F Display alternate english / metric scale (momentary display). When set to F, pressure
is displayed in psig and vacuum in “/hg.” “P” appears 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 setpoint & function code selection if AC power
is not connected.
ALT MODE Switch the functions from temperature software to DataCORDER software. The
remaining keys function the same as described above except the readings or
changes are made to the DataCORDER programming.
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