Carrier 69NT40-561-300, Operation And Service Manual

Page: 66 / 174

T-365 4–32
Cd43 XtendFresh Mode Cd43 is a user selectable mode of operation that allows the opening
and closing of an air vent door and CO
2
scrubber unit. These selection
modes are as follows:
OFF - Vent will remain closed and scrubber will remain off.
XTEND - The opening of the vent and activation of the scrubber will be
controlled based upon CO
2
and O
2
concentration values and select-
able set points. This selection is only active if the unit has a CO
2
or O
2
sensor.
TEST - Selecting “TEST” will open/close the vent and activate/deacti-
vate the scrubber to allow the user to confirm operation. If “CAL” is se-
lected, the controller will provide options for zero calibration of the CO
2
sensor input and span calibration of the O
2
sensor input.
If the unit is not configured for XtendFRESH or eAutoFresh, the Cd43
will display “
−−−− ”.
Refer to section 4.6.1 for description of operational parameters.
Display Only Function - Cd44 is a display only function.
Cd44 XtendFRESH Values / CO
2
Sensor Status
If a user presses Enter, the CO
2
value will be displayed. Pressing En-
ter again will display the O
2
value.
This function code will be dashed out if not configured for Xtend-
FRESH or eAuto-Fresh.
This function code will be dashed if CO
2
and O
2
sensors are not de-
tected, and sensors are not expected.
Configurable Functions - Cd45 through Cd48 are user-selectable functions. The operator can change the value
of these functions to meet the operational needs of the container.
Cd45 Vent Position Sensor (VPS)
Position Values: 0 to 240 for UPPER / 0 to 225 for LOWER
This function code will be dashed out if not configured for VPS.
When configured for VPS, Cd45 displays the current vent position in
units of 5 CMH (units displayed as “CM”) or CFM (units displayed as
“CF”) depending on the selection of Cd46 (Airflow display units), Cd28
(Metric/Imperial) or the pressing of the deg C/F key.
Cd45 will display whenever the control detects movement via the sen-
sor unless AL50 is active. Cd45 will display for 30 seconds, then time
out and return to the normal display mode.
Cd46 Airflow Display Units Selects the airflow units to be displayed by Cd45 if configured for Vent
Position Sensor or displayed by “USER/FLO” under Cd43 if configured
for Autoslide.
CF= Cubic Feet per Minute
CM=Cubic Meters per Hour
bOth=Displays CF or CM depending on the setting of Cd28 (Metric/Im-
perial) or the pressing of the degree C/F key.
Cd47 Variable Economy Tempera-
ture Setting Used when Economy Mode (CnF22) is set to 3-cust. Display will show
“----” when the unit is not configured for Economy Mode.
When the unit has a perishable setpoint and Economy Mode is active,
at the start of each cooling or heating cycle, high speed evaporator
fans will run for 3 minutes. After three minutes, the evaporator fans will
be switched to low speed any time that the supply temperature is with-
in +/- 0.25C of the setpoint and the return temperature is less than or
equal to the supply tempe the user selected Cd47 (values are
0.5 C - 4.0 C, default is 3.0 C).
Table 4–3 Controller Function Codes (Continued)
CODE # TITLE DESCRIPTION