Carrier PrimeLINE 69NT40-561-200, Operation And Service Manual

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7–53 T-362
6. Place a bead of the silicone sealer supplied with the replacement sensor around the sensor sealing ring.
Insert sensor into the well with the leads parallel to the suction fitting.
7. Reconnect the sensor (see Figure 7.32 ) and run pre-trip P5.
7.30 Vent Position Sensor (VPS)
The vent position sensor (VPS) determines fresh air vent position in near real-time via function code Cd45.
The fresh air vent position sensor alarm (AL50) will occur if the sensor reading is not stable for four minutes or if the
sensor is outside of its valid range (shorted or open). This can occur if the vent is loose or the panel is defective. To
confirm a defective panel, assure that the wing nut is secure and then power cycle the unit. If the alarm
immediately reappears as active, the panel should be replaced.
The alarm should immediately go inactive. Check the four minute stability requirement. If the alarm reoccurs after
the four minutes and the panel was known to have been stable, then the sensor should be replaced.
Upper VPS:
In order to replace the Upper VPS, the panel must be removed and replaced with another upper fresh air panel
equipped with VPS. Upon installation, a new VPS assembly requires calibration.
1. Rotate the vent to the 0 CMH / CFM position.Cd45 will automatically display.
2. Press and hold the ENTER key for five seconds.
3. After the ENTER key has been pressed the display will read “CAL” (for calibration).
4. Press and hold the ALT MODE key for five seconds.
5. After the calibration has been completed, Cd45 will display 0 CMH / CFM.
7.31 XtendFRESH Service
Procedures and technical information related to the XtendFRESH™ controlled atmosphere system can be found in
the
T-366 XtendFRESH Manual
, located in the Literature section of the Container Refrigeration website. To find
the manual from the Literature section, click on Options > XtendFRESH.
7.32 Maintenance of Painted Surfaces
The refrigeration unit is protected by a special paint system against the corrosive atmosphere in which it normally
operates. However, should the paint system be damaged, the base metal can corrode. In order to protect the
refrigeration unit from the highly corrosive sea atmosphere, or if the protective paint system is scratched or
damaged, clean the area to bare metal using a wire brush, emery paper or equivalent cleaning method.
Immediately following cleaning, apply paint to the area, and allow to dry. See the Parts List for proper paint
selection.