Carrier XtendFRESH, Operation, Service And Parts Manual

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T-366 6–12
Figure 6.18 Motor and Mounting Plate
5. Replace the motor and follow the instructions in reverse order.
6.8 FRESH AIR SOLENOID
6.8.1 Replacing the Fresh Air Solenoid
1. Remove the right-hand evaporator panel. Refer to Section 6.6.1 .
2. There are two solenoids in the panel. The one on the left, as facing the panel from the back, requires the
removal of a cover plate to access the four mounting screws. Remove the four 10-24 mounting screws.
3. Remove the 10-24 nuts and replace the defective solenoid by reversing steps 1-3.
6.9 VENT POSITION SENSOR
For units equipped with XtendFRESH and a Vent Position Sensor, there is a solid state switch that will change
depending on unit operation. If the unit is in XtendFRESH mode (Cd43 set to “FrESH”), the signal provided to the
controller will be sent from the Oxygen sensor. If Cd43 is set to “OFF”, the signal to the controller will be sent from
the Vent Position Sensor (VPS).
6.9.1 Checking the VPS Switch
To check the operation of the VPS switch, bring up Cd43 set the option to “OFF”. Navigate to Cd45 and then open
the manual fresh air panel and verify the sensor is reading in Cd45. Go back to Cd43 and activate XtendFRESH
(“FrESH”). Cd44 should now show the CO
2
and O
2
values. Cd45 should display “----“.
6.10 PRE-TRIP
To ensure a successful XtendFRESH trip the following pre-trip steps should be performed prior to each trip. The
following procedure is to be used in alignment with the 5x69 release or higher.
1. Remove the rear upper back panel.
2. Go to Code Select Cd18 and ensure the container has software version (5x69 or higher). Do this by pressing
the UP or DOWN arrow key until “Cd18“ is displayed, then press the ENTER key.