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

Page: 65 / 174

4–31 T-365
Cd41 Valve Override SERVICE FUNCTION: This code is used for troubleshooting, and al-
lows manual positioning of the economizer solenoid valve, electronic
expansion valve, and digital unloader valve. Provides readings such
as: Percent Capacity, EEV, Capacity Mode, LIV and DUV. Refer to
paragraph 6.21 for operating instructions.
NOTICE
For Units configured for eAutoFresh Cd43 and Cd44 using the following:
Configurable Functions - Cd43 is a user-selectable function. The operator can change the value of this function
to meet the operational needs of the container.
Cd43 eAutoFresh Mode Cd43 is a user selectable mode of operation that allows the opening
and closing of a mechanical air vent door via a stepper motor. These
selection modes are as follows:
OFF - Air makeup vent will remain closed.
USER - Allows for manual selection of the setting.
DELAY -The opening of the door is based on selected time, return
temperature and flow rate (percent opened).
gASLM - The opening is based percent open and CO
2
and O
2
select-
able limits (LM). This selection is only active if the unit has a CO
2
sensor.
TEST / CAL (CO
2
sensor option units only) - The door will fully open
and close to allow the user to inspect its operation. If CAL is selected,
the controller will zero calibrate the CO
2
sensor input.
If the unit is not configured with AutoFresh, the Cd43 will display “----”
Refer to
Section 5.4.3 for description of operational parameters.
Display Only Function - Cd44 is a display only function.
Cd44 eAutoFresh Values / CO
2
Sensor Status
Code Cd44 displays the eAutoFresh CO
2
and O
2
values (CO
2
and O
2
)
and CO
2
and O2 limits (CO
2
LIM and O
2
LIM), respectively.
This function code will be dashed out if not configured for eAutoFresh.
This function code will be dashed if CO
2
sensor is not detected, and a
sensor is not expected (didn’t have one previously).
This function code will display “ChECK” if a CO
2
sensor has not been
auto-detected at the most recent power-up and was detected at a pre-
vious power-up. If “ChECK” is displayed and the ENTER key is
pressed, “SEnSr” is displayed with the choices of “YES” and “no”:
“YES” – sensor should be remembered as detected (present)
“no” – sensor should not be remembered as being detected (not present)
NOTICE
For Units configured for XtendFRESH Cd43 and Cd44 using the following:
Configurable Functions - Cd43 is a user-selectable function. The operator can change the value of this function
to meet the operational needs of the container.
Table 4–3 Controller Function Codes (Continued)
CODE # TITLE DESCRIPTION