Carrier XtendFRESH, Operation, Service And Parts Manual

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T-366 4–2
3. Press the UP or DOWN arrow key until “FrESh” mode is in the right display, then press the ENTER key.
4. The CO
2
setpoint is displayed. “CO2SP” appears in the left display with the setpoint value blinking in the
right display. Use the arrow keys to change the setpoint and press ENTER to confirm. Or, just press ENTER
to keep the originally displayed value.
NOTE
The CO
2
setpoint is the maximum level of CO
2
allowed for the cargo. The range is 0% to 19% in 1%
increments, with a default setting of 5%.
5. Next, the O
2
setpoint is displayed. “O2 SP” appears in the left display with its setpoint blinking in the right
display. Use the arrow keys to change the setpoint and press ENTER to confirm. Or, just press ENTER to
keep the originally displayed value.
NOTE
The O
2
setpoint is the minimum level of oxygen allowed for the cargo. The range is from 3% to 21% in
1% increments; the default setting is 10%.
4.5.2 Make Off Mode Active
When OFF mode is active, all XtendFRESH operations will be disabled. The XtendFRESH vents will be closed and
the scrubber will remain off. This will be the default mode anytime a frozen mode of operation has been selected.
Whenever a frozen setpoint is selected, the current XtendFRESH setting will be saved.
1. Press the CODE SELECT key on the keypad.
2. Press the UP or DOWN arrow key until “Cd43“ is displayed.
3. Press the ENTER key. The selection in the right display will blink.
4. Press the UP or DOWN arrow key until “OFF” mode is displayed and then press the ENTER key.
4.5.3 Make Test Mode Active
When tESt mode is active, the operator has the ability to test system operation of the mechanical components, and
test the calibrate the CO
2
sensors and verify the validity of the O
2
sensor.
1. Press the CODE SELECT key on the keypad.
2. Press the UP or DOWN arrow key until “Cd43“ is displayed.
3. Press the ENTER key. The selection in the right display will blink.
4. Press the UP or DOWN arrow key until “tESt” mode is displayed and then press the ENTER key.
5. After tEST mode is selected, “tESt” in the right display will blink. Press the ENTER key as it is blinking to
enter the system tests.
tESt - Mechanical Tests
During a mechanical test, the fresh air solenoids will open for 8 seconds and then close, followed by the
blower fan(s) and scrubber motor turning on for 60 seconds. Visual inspection of each occurrence is
required. On units configured to read the scrubber motor output indicator, a message of “Scrub” PASS” will
be posted if the scrubber motor is rotating. If not, “Scrub” “FAIL” will appear.
If the unit is equipped with the Vent Position Sensor (VPS) option, you need to manually check the opera-
tion of the VPS switch. Refer to
Section 6.9.1 for additional information.