Carrier 69NT40-541-304 Guide

Container Refrigeration
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OPERATION, SERVICE AND PARTS
SUPPLEMENT
For
Dual Temperature Container
Refrigeration Units
69NT40-541-304 and 69NT40-541-345
T-319 Rev A

OPERATION, SERVICE AND
PARTS SUPPLEMENT
For
Dual Temperature Container
Refrigeration Units
69NT40-541-304 and 69NT40-541-345
© Carrier Corporation, 2017 Printed in U. S. A. March 2017

i T-319
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 UNIT LABEL IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.6 SPECIFIC WARNING AND CAUTION STATEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2 CONFIGURATION IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.1 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.1.1 Refrigeration Unit - Front Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.1.2 Evaporator Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
2.1.3 Compressor Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
2.1.4 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–6
2.1.5 Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–6
2.1.6 Back Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8
2.2 REMOTE EVAPORATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
2.2.1 Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
2.2.2 Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11
2.2.3 Electrical Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12
2.2.4 Heater Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–13
2.3 DUAL TEMP ASSEMBLY INSTALLATION KIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14
2.4 REFRIGERATION SYSTEM DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
2.5 ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
2.6 SAFETY AND PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–17
2.7 REFRIGERATION CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18
MICROPROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
3.1 TEMPERATURE CONTROL MICROPROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
3.1.1 Display Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
3.1.2 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
3.2 OPERATIONAL SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3
3.2.1 Enabling Dual Temperature Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3
3.2.2 Remote Compartment Set Point Change (SEtPt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4
3.2.3 Remote Compartment Sensor Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4
3.2.4 Remote Evaporator SMV Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4
3.2.5 Remote Evaporator Defrost Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4
3.2.6 Remote Enable Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5
3.2.7 Remote Minimum Temperature Delta . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5
3.3 REMOTE COMPARTMENT ALARMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5
3.4 UNIT PRE-TRIP DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.1 INSPECTION (BEFORE STARTING) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.2 CONNECT POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1

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4.3 STARTING AND STOPPING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.3.1 Starting the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.3.2 Stopping the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.4 START-UP INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.4.1 Physical Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.4.2 Check Controller Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.4.3 Complete Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.5 PRE-TRIP DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.6 DEFROST OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4
4.6.1 Dual Temperature Remote Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.1 REMOTE EVAPORATOR NOT RUNNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.2 REMOTE EVAPORATOR RUNS BUT HAS INSUFFICIENT COOLING . . . . . . . . . . . . . . . . . . . 5–1
5.3 REMOTE SUPPLY SENSOR MALFUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.4 HOST UNIT TRIGGERS A SHUTDOWN ALARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
DUAL TEMPERATURE SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.1 SECTION LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.2 SERVICE VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.3 MANIFOLD GAUGE SET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
6.4 PUMPING DOWN THE UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6–4
6.5 REFRIGERANT LEAK CHECKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.6 EVACUATION AND DEHYDRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.6.2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
6.6.3 Procedure - Complete System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
6.6.4 Procedure - Partial System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
6.7 REFRIGERANT CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6–7
6.7.1 Checking the Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
6.7.2 Adding Refrigerant to System (Full Charge) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
6.7.3 Adding Refrigerant to System (Partial Charge) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
6.8 SERVICING SOLENOID VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8
6.8.1 Host Solenoid Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8
6.8.2 Remote Solenoid Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8
6.8.3 Replacing Solenoid Valve Internal Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–9
ELECTRICAL WIRING SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1
7.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1
SERVICE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–1
8.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–1
9 REFRIGERATION UNIT - AREA LOCATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–1
10 CONTROL BOX - SHIELDS REMOVED, STD ELECTRICAL COMPONENTS . . . . . . . . . . . . . 10–1
11 COMPRESSOR TUBING (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–1
12 COMPRESSOR TUBING (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12–1
13 RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13–1
14 EVAPORATOR COIL - REAR PANELS REMOVED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14–1
15 BACK PANEL ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–1
16 LABELS AND DECALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16–1
17 REMOTE EVAPORATOR - FRAME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17–1
18 REMOTE EVAPORATOR - REFRIGERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18–1

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19 REMOTE EVAPORATOR - ELECTRICAL KIT (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . 19–1
20 REMOTE EVAPORATOR - ELECTRICAL KIT (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . 20–1
21 REMOTE EVAPORATOR - WIRE HARNESS (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . 21–1
22 REMOTE EVAPORATOR - WIRE HARNESS (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . 22–1
23 REMOTE EVAPORATOR - HEATER KIT (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . 23–1
24 REMOTE EVAPORATOR - HEATER KIT (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . 24–1
25 REMOTE EVAPORATOR - INSTALLATION COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . 25–1
26 REMOTE EVAPORATOR - HEATER JUNCTION BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26–1
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INDEX–1

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v T-319
LIST OF ILLUSTRATIONS
FIGURE NUMBER Page
Figure 2.1 Refrigeration Unit Front Section (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Figure 2.2 Refrigeration Unit Front Section (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Figure 2.3 Evaporator Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Figure 2.4 Compressor Section (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
Figure 2.5 Compressor Section (69NT-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
Figure 2.6 Condenser Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–6
Figure 2.7 Control Box (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–7
Figure 2.8 Control Box (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–7
Figure 2.9 Back Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8
Figure 2.10 Remote Evaporator - Frame (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
Figure 2.11 Remote Evaporator - Frame (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10
Figure 2.12 Remote Evaporator - Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11
Figure 2.13 Remote Evaporator - Electrical Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12
Figure 2.14 Remote Evaporator - Heater Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–13
Figure 2.15 Remote Evaporator - Dual Temperature Installation Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14
Figure 2.16 Refrigeration Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–19
Figure 3.1 Display Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Figure 3.2 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Figure 6.1 Service Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
Figure 6.2 Manifold Gauge Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Figure 6.3 R-134a Manifold Gauge/Hose Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
Figure 6.4 Refrigeration System Service Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
Figure 6.5 Compressor Service Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
Figure 6.6 Host Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8
Figure 6.7 Remote Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–9
Figure 6.8 Remote Solenoid Valves - Internal Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–10
Figure 7.1 Legend (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–2
Figure 7.2 Schematic (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–3
Figure 7.3 Unit Wiring Diagram - Sheet 1 (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–4
Figure 7.4 Unit Wiring Diagram - Sheet 2 (69NT40-541-304) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–5
Figure 7.5 Legend (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–6
Figure 7.6 Schematic (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–7
Figure 7.7 Unit Wiring Diagram - Sheet 1 (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–8
Figure 7.8 Unit Wiring Diagram - Sheet 2 (69NT40-541-345) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–9

T-319 vi
LIST OF TABLES
TABLE NUMBER Page
Table 2–1 Safety and Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–17
Table 3–1 Keypad Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Table 3–2 Dual Temp Display/Select Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3
Table 3–3 Remote Controller Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–7
Table 3–4 Remote Controller Pre-Trip Test Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–8
Table 4–1 Pre-Trip Selection Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3

1–1 T-319
SECTION 1
SAFETY SUMMARY
1.1 GENERAL SAFETY NOTICES
The following general safety notices augment the specific warnings and cautions appearing elsewhere in this sup-
plement. They are recommended precautions that must be understood and applied during operation and mainte-
nance 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 the specific warnings and cau-
tions appearing elsewhere in the supplement follows the general safety notices.
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 and hearing protection.
Keep hands, clothing and tools clear of the evaporator and condenser fans.
No work should be performed on the unit until all circuit breakers and start-stop switches are turned off, and power
supply is disconnected.
Always work in pairs. Never work on the equipment alone.
In case of severe vibration or unusual noise, stop the unit and investigate.
1.4 MAINTENANCE PRECAUTIONS
Beware of unannounced starting of the evaporator and condenser fans. Do not open the condenser fan grille or
evaporator access panels before turning power off, disconnecting and securing the power plug.
Be sure power is turned off before working on motors, controllers, solenoid valves and electrical control switches.
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, and any necessary repairs performed, by qualified service personnel.
When performing any arc welding on the unit or container, disconnect all wire harness connectors from the mod-
ules in both control boxes. Do not remove wire harness from the modules unless you are grounded to the unit
frame with a static safe wrist strap.
In case of electrical fire, open circuit switch and extinguish with CO2(never use water).
1.5 UNIT LABEL IDENTIFICATION
To help identify the label hazards on the unit and explain the level of awareness each one carries, an explanation is
given with the appropriate consequences:
DANGER
!
DANGER −warns against an immediate hazard which WILL result in severe personal injury or death.
WARNING
!
WARNING −warns against hazards or unsafe conditions which COULD result in severe personal
injury or death.
CAUTION
!
CAUTION −warns against potential hazard or unsafe practices which could result in minor personal
injury.

T-319 1–2
NOTICE
NOTICE −warns against potential product or property damage.
1.6 SPECIFIC WARNING AND CAUTION STATEMENTS
The statements listed below are applicable to the refrigeration unit and appear elsewhere in this manual. These
recommended precautions must be understood and applied during operation and maintenance of the equipment
covered herein.
WARNING
!
Beware of unannounced starting of the evaporator and condenser fans. The unit may cycle the
fans and compressor unexpectedly as control requirements dictate.
WARNING
!
Do not attempt to remove power plug(s) before turning OFF start-stop switch (ST), unit circuit
breaker(s) and external power source.
WARNING
!
Make sure the power plugs are clean and dry before connecting to any power receptacle.
WARNING
!
Never use air for leak testing. It has been determined that pressurized, air-rich mixtures of
refrigerants and air can undergo combustion when exposed to an ignition source.
CAUTION
!
Pre-trip inspection should not be performed with critical temperature cargoes in the container.
CAUTION
!
When Pre-Trip key is pressed, dehumidification and bulb mode will be deactivated. At the com-
pletion of Pre-Trip activity, dehumidification and bulb mode must be reactivated.
CAUTION
!
When condenser water flow is below 11 lpm (3 gpm) or when water-cooler is not in use, the
CFS switch MUST be set to position “I” or the unit will not operate properly.
CAUTION
!
Pre-trip inspection should not be performed with critical temperature cargoes in the container.
CAUTION
!
When Pre-Trip key is pressed, dehumidification and bulb mode will be deactivated. At the com-
pletion of Pre-Trip activity, dehumidification and bulb mode must be reactivated.

1–3 T-319
CAUTION
!
When a failure occurs during automatic testing the unit will suspend operation awaiting opera-
tor intervention.
CAUTION
!
When Pre-Trip test Auto 2 runs to completion without being interrupted, the unit will terminate
pre-trip and display “Auto 2” “end.” The unit will suspend operation until the user depresses
the ENTER key!
CAUTION
!
The unit will remain in the full cooling mode as long as the emergency bypass switch is in the
BYPASS position and the MODE SWITCH is in the FULL COOL position. If the cargo may be
damaged by low temperatures, the operator must monitor container temperature and manually
cycle operation as required to maintain temperature within required limits.
CAUTION
!
The unit will remain in the DEFROST mode as long as the emergency defrost switch is in the
DEFROST position. To prevent cargo damage, the operator must monitor container tempera-
ture and manually cycle operation as required to maintain temperature within required limits.
CAUTION
!
To prevent trapping liquid refrigerant in the manifold gauge set, be sure set is brought to suc-
tion pressure before disconnecting.
CAUTION
!
Do not over tighten or damage the enclosing tube assembly. Torque to 200-inch pounds (2.3
Mkg). Also make sure all parts are placed on the enclosing tube in proper sequence to avoid
premature coil burnout.

T-319 1–4

2–1 T-319
SECTION 2
DESCRIPTION
INTRODUCTION
This technical supplement contains information specific to the 69NT40-541-304 and 69NT40-541-345 dual tem-
perature system. It is to be used in conjunction with the Service Parts List and the Operation and Service Manual
for 69NT40-541-300 to 399 series units. The information in this manual is designed to supplement both the Service
Parts List and the Operation and Service Manual.
The Carrier Transicold model 69NT40-541-304 and 69NT40-541-345 dual temperature system combines the stan-
dard ThinLine host evaporator with a dual discharge remote evaporator, which is used for refrigeration in a second
compartment. The remote evaporator is mounted on the ceiling of the rear compartment and connected to the host
unit by refrigerant lines and control wiring. The two compartments are separated by an insulated bulkhead, which
can be moved within a range of 12 feet to accommodate varied load sizes.
CONFIGURATION IDENTIFICATION
Unit identification information is provided on a plate located near the compressor. The plate provides the unit model
number, the unit serial number and the unit parts identification number (PID). The model number identifies the
overall unit configuration, while the PID provides information on specific optional equipment, factory provision to
allow for field installation of optional equipment and differences in detailed parts.
Configuration identification for the models covered herein may be obtained on the Container Products Group Infor-
mation Center by authorized Carrier Transicold Service Centers.
2.1 GENERAL DESCRIPTION
2.1.1 Refrigeration Unit - Front Section
The design of the refrigeration unit allows for access to the majority of components from the front (see Figure 2.1).
The unit model number, serial number, and parts identification number (PID) can be found on the serial plate to the
left of the compressor.
The dual temperature system utilizes a remote evaporator kit, which contains the components necessary for dual
temperature operation.
This configuration also affects the refrigeration unit, adding refrigerant connections for the remote evaporator, addi-
tional contactors in the electrical kit, a larger receiver, a host evaporator liquid line solenoid valve, and a different
function code label.

T-319 2–2
Figure 2.1 Refrigeration Unit Front Section (69NT40-541-304)
1. Labels and Decals
2. Control Box
3. Receiver
4. Host Liquid Line Solenoid Valve (Location)
5. Compressor Tubing
6. Evaporator Coil
7. Back Panel Assembly
- - - - -
1
2
3
4
5
67

2–3 T-319
Figure 2.2 Refrigeration Unit Front Section (69NT40-541-345)
1. Labels and Decals
2. Control Box
3. Receiver
4. Host Liquid Line Solenoid Valve (Location)
5. Compressor Tubing
6. Evaporator Coil
7. Back Panel Assembly
- - - - -
1
2
3
4
5
67

T-319 2–4
2.1.2 Evaporator Section
The evaporator section is equipped with additional refrigerant piping required to accommodate the remote evapo-
rator assembly (see Figure 2.3).
Figure 2.3 Evaporator Section
1. Host Unit Suction Line
2. Suction Line from Remote Evaporator
3. Liquid Line from Host Liquid Solenoid Valve
(HLSV) to Host TXV
4. Liquid Line to HLSV
5. Suction Line from Remote Evaporator
6. Liquid Line to Remote Evaporator
- - - - -
2.1.3 Compressor Tubing
Units equipped with the dual temperature system include a secondary compressor suction line assembly. This
assembly includes a stepper motor valve and a stepper motor power pack. The secondary tubing line runs parallel
to the primary line.
1234
56
2

2–5 T-319
Figure 2.4 Compressor Section (69NT40-541-304)
1. Stepper Motor Valve Assembly
2. Connector to Power Pack
3. Stepper Motor Power Pack for Remote Evaporator
SMV
4. Tube Assembly
5. Suction Service Valve
6. Suction Line from Remote Evaporator
7. Suction Line from Host Evaporator
- - - - -
Figure 2.5 Compressor Section (69NT-541-345)
1. Stepper Motor Valve Assembly
2. Connector to Power Pack
3. Stepper Motor Power Pack for Remote Evaporator
SMV
4. Tube Assembly
5. Suction Service Valve
6. Suction Line from Remote Evaporator
7. Suction Line from Host Evaporator
- - - - -
1
2
3
4
5
6
7
1
2
3
4
5
6
7

T-319 2–6
2.1.4 Receiver
The dual temperature system includes a larger receiver designed to accommodate the additional refrigerant
required for this configuration.
Figure 2.6 Condenser Section
1. Receiver
2. Sight Glass
3. Moisture-Liquid Indicator
4. Fusible Plug OR Rupture Disc
5. Liquid Line Valve Bracket
6. Liquid Line Valve
7. Host Liquid Line Solenoid Valve Body
8. Host Liquid Line Solenoid Valve Coil
9. Quench Valve
- - - - -
2.1.5 Control Box
The dual temperature system includes four additional contactors (PA, PB, VE, VH) and an auxiliary contact as illus-
trated in Figure 2.7.
1
2
2
3
4
5
6
7
8
4
9