Carrier XtendFRESH Guide

Container Refrigeration
OPERATIONS, SERVICE, AND
PARTS MANUAL
For
XtendFRESHTM
Controlled Atmosphere Option
T-366 Rev G

OPERATIONS, SERVICE, AND
PARTS MANUAL
For
© Carrier Corporation, 2018 Printed in U. S. A. September 2018
XtendFRESHTM
Controlled Atmosphere Option

i T-366
TABLE OF CONTENTS
PARAGRAPH NUMBER PAGE
SAFETY SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.1 GENERAL SAFETY NOTICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.2 FIRST AID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.3 OPERATING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.4 MAINTENANCE PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.5 SPECIFIC DANGER, WARNING AND CAUTION STATEMENTS . . . . . . . . . . . . . . . . . . . . . 1–1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
3.1 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
3.1.1 Refrigeration Unit - Front Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
3.1.2 Evaporator Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.2 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.3 PRE-TRIP INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.4 XTENDFRESH OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.5 CODE 43 (CD43) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.5.1 Activate Fresh Mode to Start Up the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.5.2 Make Off Mode Active . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.5.3 Make Test Mode Active . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.6 CODE 44 (CD44) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
4.6.1 Display Cd44 Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
4.7 CONTAINER VENTING PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.1 ALARMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.2 XTENDFRESH ASSEMBLY NOT OPERATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
5.2.1 Solenoid Valves Not Opening Air Vent(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
5.2.2 XtendFRESH Fan(s)/XtendFRESH Scrubber Not Operating . . . . . . . . . . . . . . . . 5–5
5.2.3 Heater(s) Not Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–6
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.1 MAINTENANCE SCHEDULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.2 PANEL AIR FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.2.1 Removing the Panel Air Filter(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.2.2 Replacing the Panel Air Filter(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
6.3 SENSOR AIR FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.3.1 Removing the Sensor Air Filter Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
6.3.2 Replacing the Sensor Air Filter Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
6.4 OXYGEN SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
6.4.1 Removing the Oxygen Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
6.4.2 Replacing the Oxygen Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.5 CARBON DIOXIDE SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.5.1 Removing the CO2 Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5

T-366 ii
6.6 XTENDFRESH ACCESS PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
6.6.1 Removing the XtendFRESH Access Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
6.6.2 Re-installing the XtendFRESH Access Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
6.6.3 Replacing the XtendFRESH Fan(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
6.7 SCRUBBER FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
6.7.1 Removing the Scrubber Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
6.7.2 Installing the Scrubber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–10
6.7.3 Replacing the Scrubber Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–11
6.8 FRESH AIR SOLENOID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–12
6.8.1 Replacing the Fresh Air Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–12
6.9 VENT POSITION SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–12
6.9.1 Checking the VPS Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–12
6.10 PRE-TRIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–12
6.11 CONTAINER PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–13
6.11.1 Box Checkout/Leak Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–13
6.12 CONTAINER CURTAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6–15
6.12.1 Installing the Curtain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–16
ELECTRICAL WIRING SCHEMATIC AND DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1
7.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1
SERVICE PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–1
8.1 ORDERING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–1
8.2 LETTER DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–1
9 PARTS LIST FOR XTENDFRESH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–1
10 PARTS LIST FOR PANEL ASSEMBLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–1
10 PARTS LIST FOR PANEL ASSEMBLIES NT2617 AND UP . . . . . . . . . . . . . . . . . . . . . . . . . 10–3
11 PARTS LIST FOR SENSOR ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–1
12 PARTS LIST FOR SCRUBBER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12–1
13 PARTS LIST FOR WIRING ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13–1
14 PARTS LIST FOR MOTOR ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14–1
15 PARTS LIST FOR CONTROL BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–1
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INDEX–1

iii T-366
LIST OF ILLUSTRATIONS
FIGURE NUMBER Page
Figure 3.1 Refrigeration Unit - Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Figure 3.2 Evaporator Section Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Figure 6.1 XtendFRESH Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Figure 6.2 Panel Air Filter(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Figure 6.3 CO2/O2 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
Figure 6.4 Left Access Panel and Back Panel (Inside of Container) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
Figure 6.5 Filter Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
Figure 6.6 O2 Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
Figure 6.7 CO2 Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
Figure 6.8 Blower Fan Nut Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
Figure 6.9 Torque Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
Figure 6.10 Hose/Scrubber Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8
Figure 6.11 Removing the Scrubber Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8
Figure 6.12 Scrubber Bolt/Spring Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–9
Figure 6.13 Scrubber Separated with Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–9
Figure 6.14 Carbon Filter with Gasket and Seal Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–10
Figure 6.15 Bolt/Spring Assembly Dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–10
Figure 6.16 Scrubber Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–11
Figure 6.17 Scrubber Mounting Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–11
Figure 6.18 Motor and Mounting Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–12
Figure 6.19 Warning Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–13
Figure 6.20 Container Leakage Test Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–14
Figure 6.21 Magnehelic Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–14
Figure 6.22 Fresh Air Panel Collars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–15
Figure 7.1 PIDs NT2570 and NT2617 - Schematic and Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–2
Figure 7.2 PIDs NT2570 and NT2617 - Schematic and Diagram (Page 2) . . . . . . . . . . . . . . . . . . . . . . . . . . 7–3
Figure 7.3 PIDs NT2570 and NT2617 - Diagram and Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–4
Figure 7.4 PIDs NT2619 and NT2704 - Schematic and Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–5
Figure 7.5 PIDs NT2619 and NT2704 - Schematic and Wiring Diagram (Page 2) . . . . . . . . . . . . . . . . . . . . 7–6
Figure 7.6 PIDs NT2619 and NT2704 - Diagram and Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–7
Figure 7.7 PIDs NT2709 and NT2774 - Schematic and Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–8
Figure 7.8 PIDs NT2709 and NT2774 - Schematic and Wiring Diagram (Page 2) . . . . . . . . . . . . . . . . . . . . 7–9
Figure 7.9 PIDs NT2709 and NT2774 - Diagram and Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–10

T-366 iv
LIST OF TABLES
TABLE NUMBER Page
Table 6–1 Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1

1–1 T-366
SECTION 1
SAFETY SUMMARY
1.1 GENERAL SAFETY NOTICES
The following general safety notices supplement specific warnings and cautions appearing elsewhere in this man-
ual. These recommended precautions must be understood and applied during operation and maintenance of the
equipment covered herein. The general safety notices are presented in the following three sections labeled: First
Aid, Operating Precautions and Maintenance Precautions. A listing of specific warnings and cautions appearing
elsewhere in the manual follows the general safety notices. Additional notices for Worker Safety, and High Voltage
Safety are also included.
1.2 FIRST AID
An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention immediately.
1.3 OPERATING PRECAUTIONS
Always wear safety glasses.
Keep hands, clothing and tools clear of the evaporator and condenser fans.
Wear appropriate personal protective equipment for the work being undertaken.
No work should be performed on the unit until all circuit breakers and start-stop switches are turned OFF, and
power supply is disconnected.
In case of severe vibration or unusual noise, stop the unit and investigate.
1.4 MAINTENANCE PRECAUTIONS
Be sure power is turned OFF before installation of XtendFRESHTM Controlled Atmosphere option. Tag circuit
breaker and power supply to prevent accidental energizing of circuit. Do not bypass any electrical safety devices,
e.g. bridging an overload, or using any sort of jumper wires.
Problems with the system should be diagnosed, any necessary repairs performed by qualified service personnel.
When performing any arc welding on the container unit or refrigerated compartment, disconnect all wire harness
connectors from the modules in the control box. Do not remove wire harness from the modules unless you are
grounded to the container unit frame with a static safe wrist strap.
1.5 SPECIFIC DANGER, WARNING AND CAUTION STATEMENTS
To help identify the hazards presented on the container unit labels and explain the level of awareness each one
carries, an explanation is given with the appropriate consequences:
DANGER - alert to an immediate hazard that WILL result in severe personal injury or death.
WARNING - alert to hazards or unsafe conditions that COULD result in severe personal injury or death.
CAUTION - alert to potential hazard or unsafe practice that could result in minor personal injury, product or prop-
erty damage.
The following safety statements are applicable to the XtendFRESH option unit used with any container unit and
appear elsewhere in this manual. These recommended precautions must be understood and applied during opera-
tion and maintenance of the equipment covered herein.

T-366 1–2
WARNING
!
In case of electrical fire, open circuit switch and extinguish with CO2 (never use water).
WARNING
!
Potential hazardous atmosphere and low oxygen levels inside the container, ventilate before
entering. Stay away from doors while venting. Refer to Section 4.7.
WARNING
!
Before servicing the unit, make sure the Start-Stop switch (ST) is in the OFF position. Unit cir-
cuit breaker (CB-1) and external power sources are turned OFF and tagged to prevent acciden-
tal energizing of circuits.
CAUTION
!
DO NOT RUN THE CAL SELECTION UNDER LOADED CONDITIONS

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SECTION 2
INTRODUCTION
2.1 INTRODUCTION
This manual contains information specific to the Carrier Transicold XtendFRESHTM Controlled Atmosphere option.
This manual is to be used in conjunction with the separately bound Operation and Service Manual and Service
Parts Manual for the model of your particular refrigeration unit.
Carrier Transicold’s exclusive XtendFRESH option is a modular system. The XtendFRESH system’s ability to con-
trol container atmosphere is done by removing ethylene and simultaneously controlling levels of O2 and CO2. This
extends the produce ripening process, which results in an increase in shelf life and enables longer cargo routes for
certain high respiring, perishable commodities.

3–1 T-366
SECTION 3
DESCRIPTION
3.1 GENERAL DESCRIPTION
3.1.1 Refrigeration Unit - Front Section
The refrigeration unit is designed so that the majority of its components are accessible from the front (Figure 3.1).
A manually operated venting system is located in the upper left access panel. Behind this left access panel are
located the CO2 sensor and O2 sensor. The right access panel contains integrated components of the Xtend-
FRESHTM Controlled Atmosphere option. This panel may be removed to allow entry into the evaporator section
where the CO2 scrubber and other components are located.
Figure 3.1 Refrigeration Unit - Front
3.1.2 Evaporator Section
Components of the XtendFRESH option are mounted in the evaporator section in addition to the standard refriger-
ation unit components. These components (Figure 3.2) include the XtendFRESH Scrubber Assembly, Motor
Assembly and Sensor Package.
Air from within the container is passed to the O2 sensor and CO2 sensor. Data is then supplied to the controller.
The controller calculates O2 and CO2 values in order to maintain the preset values.
XtendFRESH
Panel
XtendFRESH
Control Box

T-366 3–2
Figure 3.2 Evaporator Section Components
1. Scrubber Filter Assembly
2. Desorb Out Hose
3. CO2 Scrubber Motor
4. O2 Sensor
5. Fresh Air Solenoid
6. CO2 Sensor
7. Sensor Air Filter
8. O2 Amplifier
9. Desorb In Hose
10. O2/CO2 Inlet
11. O2/CO2 Outlet
12. Port Cap
- - - - -
21
59
68
11
3
11
10 74
Scrubber Assembly
Motor Assembly
Sensor Package
12

4–1 T-366
SECTION 4
OPERATION
4.1 INTRODUCTION
This section addresses the operating requirements for the XtendFRESHTM Controlled Atmosphere option.
Operating parameters are not changed except for XtendFRESH settings. For information pertaining to the
operation of the refrigeration system, refer to the Operation and Service Manual for your particular model.
4.2 OPERATION
The XtendFRESH (FrESh) option is a modular option that offers enhanced functionality to help slow the ripening
process of perishable cargo by removing ethylene and simultaneously controlling CO2 and O2 levels in multiple
combinations. This enables the fresh transport of perishables on longer voyages. The system’s ability to control the
container atmosphere is performed with the use of a CO2 Scrubber and a fresh air vent.
During the scrubbing process, CO2 and ethylene are removed. The scrubber allows for the control of CO2 based
on CO2. sensor input. The oxygen is controlled by the cargo’s natural respiration and by opening and closing sole-
noid operated air vents. An O2 sensor monitors the level of O2 and allows the system to prevent the O2 levels from
dropping below the lower setpoint.
NOTICE
While the XtendFRESH option is operating, the process of inducing ripening by introducing
ethylene should not be performed.
4.3 PRE-TRIP INSPECTION
Pre-trip testing of the XtendFRESH option is performed via Function Code 43. During the pre-trip inspection, the
technician will verify operation by visual observation during this test. Refer to the Pre-Trip information in Section
6.10.
4.4 XTENDFRESH OPERATION
There are two function codes, Code 43 and Code 44, that assist with XtendFRESH operation. Code 43 contains
specific parameters for operation and Code 44 provides a visible display of component conditions.
4.5 CODE 43 (CD43)
4.5.1 Activate Fresh Mode to Start Up the System
In FrESh mode, all XtendFRESH operations are enabled and setpoints for CO2 and O2 can be edited.
1. Press the CODE SELECT key on the keypad.
2. Press the UP or DOWN arrow key until “Cd43“ is displayed, then press the ENTER key. The selection in the
right display will blink.
Cd43 is used to select a specific mode of operation and the associated parameters. The
modes of operation are: FrESh, OFF, and tESt. Within each of these modes of operation
are sub menus that have selectable parameters. Not all parameters are available in each
sub menu. When setting any mode of operation, the entire process must be followed to
ensure all parameters are set.

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 CO2 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 CO2 setpoint is the maximum level of CO2 allowed for the cargo. The range is 0% to 19% in 1%
increments, with a default setting of 5%.
5. Next, the O2 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 O2 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 CO2 sensors and verify the validity of the O2 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.

4–3 T-366
tESt - Sensor Tests
During a sensor test, the controller will verify that the CO2 sensor is reading 0% and the O2 sensor is in a
valid range. If both meet this requirement, a calibration test “CAL StArt” will be displayed for five seconds,
a CO2 sensor calibration will be performed and an O2 sensor validity check will be performed. Then, a ten
minute countdown timer is placed in the right hand display.
If both sensors pass, a “CAL PASS” message will display for five minutes or until the user presses and
holds the CODE SELECT key for five seconds. In either case, normal operation will be resumed.
If one or both of the sensors are outside of the range, check condition requirements. The failed results will
be displayed “No CAL”, alternating every five seconds. To exit, the user should press and hold the CODE
SELECT key for three seconds. A “CO2 FAIL” or “O2 FAIL” message will appear if the test fails.
If the range check fails (indicating a drifted sensor), verify that the box is clean of cargo remnants from last
trip, open the back doors, and rerun the test. If the range check fails a second time, replace the sensor that
is out of range.
If either of the sensors fail open or shorted, an Alarm 09 for O
2
sensor or Alarm 10 for CO
2
sensor will occur.
NOTICE
It is required that the calibration procedure only be performed during pre-trip or when the con-
tainer has been fully vented.
4.6 CODE 44 (CD44)
4.6.1 Display Cd44 Values
1. Press the CODE SELECT key on the keypad.
2. Press the UP or DOWN arrow keys until “Cd44” is in the left display, then press ENTER.
3. Press the DOWN arrow key to toggle between the different values available in this sub menu.
Cd44 allows the user to view the following XtendFRESH values: CO2 setpoint, CO2 per-
centage, O2 setpoint, O2 percentage, and O2 voltage.
For the CO2 setpoint, the range is from 0 to 19% in 1% increments with a default setting
of 5%. For the O2 setpoint, the range is from 3% to 21% in 1% increments with a default
setting of 10%.
CO2 Setpoint
CO2 %
O2 Setpoint
O2 %
O2 Voltage

4.7 CONTAINER VENTING PROCEDURE
WARNING
!
Potential hazardous atmosphere and low oxygen levels inside the container, ventilate before
entering. Stay away from doors while venting. (Refer to Section 4.7)
1. Set the Start-Stop (ST) switch to the “I” position to turn the unit On.
2. Fully open the manual fresh air vent.
NOTE
Avoid any direct breathing of the venting gases from the air makeup vent.
3. Go to Cd43, select Fresh mode and set the operating parameters to 21% O2. Refer to Section 4.5.1
4. Allow the refrigeration unit to run. This allows the evaporator fans to exchange low-oxygen level air with
ambient air.
5. Monitor the container internal environment via Cd44. Refer to Section 4.6.1.
6. When the oxygen level reaches a safe level ~ 20 ± 2%, open both of the container rear doors and pull back
the curtain to facilitate the clearing of the hazardous atmosphere. Step away from the container rear doors.
Continue refrigeration operation for five minutes prior to entry or unloading of the container.

5–1 T-366
SECTION 5
TROUBLESHOOTING
5.1 ALARMS
Alarm display is an independent controller software function. If an operating parameter is outside of the expected
range or a component does not return a valid signal back to the controller, an alarm is generated. The Xtend-
FRESHTM Controlled Atmosphere option alarms are AL07, AL09, AL10, AL29, AL62 and AL96.
AL07 FRESH AIR VENT OPEN
Cause: For units equipped with XtendFRESH and a Vent Position Sensor, the controller will monitor the
manual fresh air opening at a pre-determined time. If during this time the fresh air vent is open and
XtendFRESH is active, an alarm will be generated. If alarm is active, the controller monitors the
manual fresh air once per hour. Upon clearing the alarm, the controller goes back to monitoring at
the pre-determined time.
Component Vent Position Sensor (VPS)
Troubleshooting Manually reposition vent to 0% and confirm using Cd45. If Cd45 is not
reading 0%, perform a calibration of the panel. Refer to Section 6.9.
If unable to obtain a zero reading, replace the defective VPS.
If unit is loaded, ensure vent is closed. Note and replace VPS on next PTI.
The alarm will not affect the XtendFRESH system from operating.
AL09 O2 SENSOR FAILURE
Cause: Triggered anytime the O2 sensor reading is outside of the normal operation range, after an initial
signal was detected.
Component O2 Sensor, O2 Amplifier, Sensor Switch Module (if equipped)
Troubleshooting Check Cd44 and scroll down to 02V. The O2 sensor output will be dis-
played in millivolts (130mV to 4100mV).
Switch equipped: If voltage is not present at Cd44 and a sensor switch
module is installed, check for O2 voltage on the black wire connected to the
sensor switch module, connecting ground of meter to TP9. If the voltage is
in the 130mV to 4.1V range, directly wire the black wire to KD04. This may
cause an AL07 depending on O2 reading but XtendFRESH will operate
normally. If no voltage on the black wire, proceed to next step.
Check wiring (refer to schematic), and correct if found mis-wired.
If O
2
sensor is available, remove the upper fresh air panel and evaporator
motor and replace the sensor. If after replacing sensor AL09 continues, re-
place amplifier.
If parts are not available, turn XtendFRESH option off (Cd43) and open the
Manual Fresh Air Vent.

T-366 5–2
AL10 CO2 SENSOR FAILURE
Cause: Triggered anytime the CO2 sensor reading is outside of the normal operation range, after an initial
signal was detected.
Component CO2 Sensor
Troubleshooting Check the voltage at MC5 to the ground pin on TP9. (1 - 4.7 vdc)
Check wiring (refer to schematic), and correct if found mis-wired.
If part is available, remove upper fresh air panel and evaporator motor; re-
place sensor. If no part is available, take no action and service at next PTI.
XtendFRESH will continuously run the scrubber. O2 level will be controlled
with the opening and closing of the fresh air vents as required.
AL29 LOSS OF ATMOSPHERIC CONTROL
Cause: Triggered whenever the CO2 level is above its upper limit by 1% for 60 minutes. Or, when the O2
level is greater than 1% below its setpoint for longer than 30 minutes after the unit has been in
range. The alarm is triggered off when the levels return to within the normal range.
Setup
Run Cd43 test mode for troubleshooting the below components. If test mode
times out, you must restart the mode prior to the continuation of testing.
Troubleshooting If components do not energize, check FX1 and FX2 for power (460 VAC).
If fuse is open, check heater continuity (XHT1 to ground). Must be greater
than 1 mega ohm. If less than 1, disconnect the heater at XHT1 and XHT2.
Replace fuse. Unit will control on fresh air solenoids.
Component Solenoid Air Vents.
Troubleshooting Visually inspect to see if the Solenoid Valves are opening air vents. If vents
open, troubleshoot the next component. If vents do not open, continue with
troubleshooting below.
Check FX4 fuse for power (~20 volts dc).
If fuse is open, check wiring and or replace solenoid if part is available.
If no part is available, open manual fresh air vent.
Component XtendFRESH Fan(s) / XtendFRESH Scrubber Motor
Troubleshooting
Visually inspect to see if the XtendFRESH Fan(s) are running (air blowing on
left, intake on right), check current draw of motor at the XST1 (~40 to 200
milliamps / contactor load side). Troubleshoot the non-operating component.
If both are running, proceed to next component.
Verify XS contactor is pulling in. If not, check FX6 fuse for power (24 VAC).
If not, check power at controller KB4.
Check FX3 fuse for power (~20 vdc). If no power, replace fuse. If fuse opens
a second time, take no further action. O
2
level will be controlled with the
opening and closing of the fresh air vents.
If part is available, replace either fan or scrubber motor. Fan is replaceable
from the front on a loaded unit; Scrubber motor is not. If no part is available
or accessible, take no action and service at next PTI. O
2
level will be con-
trolled with the opening and closing of the fresh air vents.
Component Heater
Troubleshooting Verify XH contactor is pulling in. If not, check FX6 for power (24 VAC). If
open ohm contactors XHA1 and XSA1 to ground. Replace (12 Amp) con-
tactor. If contactor is pulling, power unit off and check heater resistance
from XH1 to XH2 (450 to 500 ohms). If heater is outside of the range, dis-
connect heater at XHT1 and XHT2 and replace at next PTI. Unit will control
on fresh air solenoids.