3–3
T-319
3.2
OPERATIONAL SOFTWARE
The host unit is operable in Frozen or Perishable modes, with a set point range of -22 to 86°F (-30 to 30°C). For
detailed information on modes of operation for the host unit, refer to Section 3 of the Operations and Service man-
ual for 69NT40-541-300 to 349 series units.
The remote evaporator unit is designed to operate in perishable mode only, with a set point range of 28 to 70°F (-2
to 21°C). The remote evaporator unit functions within Dual Temperature Mode, which is enabled via Code Select
Code 52 (Cd52). If Cd52 is disabled (OFF), the menu options will not be available and remote evaporator fans will
be disabled. When Code 52 is ON, press the ENTER key to scroll to the desired function code (refer to
3.2.1
Enabling Dual Temperature Operation
Dual temperature operation is enabled via Function Code 52 (Cd52). All selectable parameters associated with the
remote compartment are viewed and set through Cd52. If Cd52 is disabled (OFF), the menu options will not be
available.
To enable dual temperature operation, perform the following steps:
1. Press the CODE SELECT key, then press an arrow key until the left window displays “Cd52”.
2. The right window will display the value of this item for five seconds before returning to the normal display
mode.
3. If more time is needed, press the ENTER key to extend the time to 30 seconds.
Arrow Up
Change or scroll a selection upward Pre-trip advance or test interruption.
Arrow Down
Change or scroll a selection downward. Pre-trip repeat backward.
Return/Supply
Displays non-controlling probe temperature (momentary display).
Degrees C/F
Displays alternate English/Metric scale (momentary display). When set to degrees Fahren-
heit, 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 degrees Celsius, pressure readings
are in bars. “b” appears after the value to indicate bars.
Battery Power
Initiate battery backup mode to allow set point and function code selection if AC power is not
connected.
ALT. Mode
This key is pressed to switch the functions from the temperature software to the DataCORD-
ER Software. The remaining keys function the same as described above except the readings
or changes are made to the DataCORDER programming.
Table 3–2 Dual Temp Display/Select Functions
CODE
FUNCTION
SEtPt
Remote supply set point
PSPLy
Remote supply air temperature
SSPLy
Remote secondary supply temperature
rEtUR
Remote return air temperature
dtS
Remote defrost temperature sensor
rESV
Remote SMV position
dFrST
Remote defrost interval
rEnbl
Remote enable temperature
rt
∆
Remote minimum temperature delta
Table 3–1 Keypad Function
KEY
FUNCTION
Summary of Contents for 69NT40-541-304
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