Carrier 69NT40-511-1, 69NT40-511-199, 69NT40-521 User Manual

Page 1

Container Refrigeration Unit

Models 69NT40-511-1 to 69NT40-511-199 and 69NT40-521

DUE TO THE LARGE NUMBER OF SCHEMATIC DIAGRAMS CONTAINED IN THIS BOOK, THE BOOK IS PRESENTED AS TWO FILES. REFER TO FILE T268--DIAGRAMS FOR THE CHAPTER 7 ELECTRICAL DIAGRAMS AND SCHEMA TICS

T-268 Rev G

Page 2

OPERATION AND

SERVICE MANUAL

CONTAINER REFRIGERATION UNIT

MODELS

69NT40-511-1

69NT40-511-199

and

69NT40-521

Carrier Transicold Division, Carrier Corporation, P.O. Box 4805, Syracuse, N.Y. 13221

E Carrier Corporation 1999 S Printed in U. S. A. 0499

Page 3

SAFETY SUMMARY

GENERAL SAFETY NOTICES

The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this manual. They are recommended precautions that must be understood and applied during operation and maintenance of the equipment covered herein. The general safety noticesare presentedin the following three sections labeled:First Aid, Operating Precautions and Maintenance Precautions. A listing of the specific warnings and cautions appearing elsewhere in the manual follows the general safety notices.

FIRST AID

An injury, no matter how slight, shouldnever go unattended.Always obtain firstaid or medicalattention immediately.

OPERATING PRECAUTIONS

Always wear safety glasses.

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.

SAFETY SUMMARY

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, and disconnecting and securing the power plug.

Be surepower is turned off beforeworking on motors, controllers,solenoid valves and electricalcontrol 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 arcwelding on the unit or container,disconnect all wire harness connectors fromthe modules in the control box. 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 CO

(never use water).

Safety-1 T-268-07

Page 4

SPECIFIC WARNING AND CAUTION STATEMENTS

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 -- means an immediate hazard which WILL result in severe personal injury or death.

WARNING -- means to warn against hazards or unsafe conditions which COULD result in seve re personal injury or death.

CAUTION -- means to warn against potential hazard or unsafe practice which COULD result in minor personal injury, product or property damage.

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

When servicing the unit, use caution when handling R-134a. The refrigerant when in contact with

high temperatures (about 1000_F) will decompose into h ighly corrosive and toxic compounds.

WARNING

Be sure to avoid refrigerant coming in contact with the eyes. S hould refrigerant come in contact

with the eyes, wash eyes for a minimum of 15 minutes with potable water only. THE USE OF

MINERAL OIL OR REFRIGERANT OILS IS NOT RECOMMENDED.

WARNING

Be sure to avoid refrigerant coming in contact with the skin. Should refrigerant come in contact

with the skin, it should be treated as if the skin had been frostbitten or frozen.

WARNING

Be sure ventilation in the workspace is adequate to keep the concentration of refrigerant below

1000 parts per million. If necessary, use portable blowers.

WARNING

Beware of rotating fan blades and unannounced starting of fans.

WARNING

Do not use a nitrogen cylinder without a pressure regulator. Never mix refrigerants with 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.

WARNING

Never fill a refrigerant cylinder beyond its rated capacity. Cylinder may rupture due to excessive

pressure when exposed to high temperatures.

WARNING

When starting the unit, be sure that all manual refrigerant valves in the discharge line are open.

Severe damage could occur from extremely high refrigerant pressures.

Safety-2T-268-07

Page 5

TABLE OF CONTENTS

Section Page

SAFETY SUMMAR Y Safety-1......................................................

GENERAL SAFETY NOTICES Safety-1..............................................

FIRST AID Safety-1...............................................................

OPERATING PRECAUTIONS Safety-1..............................................

MAINTENANCE PRECAUTIONS Safety-1...........................................

SPECIFIC WARNING AND CAUTION STATEMENTS Safety-2.........................

INTRODUCTION 1-1..........................................................

1.1 INTRODUCTION 1-1...................................................

DESCRIPTION 2-1...........................................................

2.1 GENERAL DESCRIPTION 2-1...........................................

2.2 REFRIGERATION SYSTEM DATA 2-10....................................

2.3 ELECTRICAL DATA 2-11................................................

2.4 POWER AUTOTRANSFORMER (Optional) 2-12............................

2.5 UPPER FRESH AIR MAKEUP VENT 2-13.................................

2.6 LOWER FRESH AIR MAKEUP VENT (Optional) 2-13........................

2.7 REFRIGERATION CIRCUIT WITH RECEIVER 2-14.........................

2.8 REFRIGERATION CIRCUIT WITH THE

WATER-COOLED CONDENSER (Optional) 2-16............................

2.9 WATER-COOLED CONDENSER (Optional) 2-16............................

2.9.1 Water--Cooled Condenser with Water Pressure Switch (WP) 2-16.....

TABLE OF CONTENTS

2.9.2 Water-Cooled Condenser with Condenser Fan Switch (CFS) 2-16.....

2.10 SUCTION SOLENOID VALVE 2-18........................................

2.11 REMOTE MONITORING (OPTIONAL) 2-18................................

2.12 SAFETY AND PROTECTIVE DEVICES 2-19...............................

MICROPROCESSOR 3-1......................................................

3.1 MICRO-LINK 2i CONTROLLER MODULE 3-1.............................

3.1.1 Brief Description 3-1............................................

3.1.2 Controller Programming (Memory) Cards 3-2......................

3.1.3 General Layout of the Controller Section 3-4.......................

3.1.4 Controller Function Codes 3-6...................................

3.1.5 Controller Alarms 3-10...........................................

3.1.6 Condenser Pressure Control (CPC) 3-14...........................

3.1.7 Controller Temperature Control 3-14...............................

3.1.7.1 Perishable (Chill) Range Above --10_C(+14_F),

or --5_C(+23_F) Optionally. 3-14.........................

3.1.7.2 Frozen Range Below --10_C(+14_F),

or --5_C(+23_F) Optionally 3-17.........................

3.2 PRE-TRIP DIAGNOSTICS 3-17...........................................

3.2.1 Pre-Trip 3-18....................................................

3.2.2 Pre-Trip Mode 3-19..............................................

3.3 INTEGRATED DataCorder (Optional) 3-24.................................

i T-268-07

Page 6

TABLE OF CONTENTS (CONTINUED)

Section Page

3.3.1 Brief Description 3-24............................................

3.3.2 DataCORDER Configuration 3-25.................................

3.3.3 DataCORDER Function Codes 3-26...............................

3.3.4 DataCORDER Alarms 3-27.......................................

3.3.5 Access to DataCORDER Functions 3-29...........................

3.3.6 USDA/ Message Trip Comment 3-31...............................

3.3.7 USDA Recording 3-31...........................................

3.3.8 Pre-Trip Data Recording 3-31.....................................

3.3.9 DataCORDER Communications 3-31..............................

3.3.10 DataCORDER Scrollback 3-32....................................

3.4 USDA COLD TREATMENT PROCEDURE 3-32.............................

OPERATION 4-1.............................................................

4.1 PRE-TRIP INSPECTION (Before Starting) 4-1.............................

4.2 STARTING AND STOPPING INSTRUCTIONS 4-2.........................

4.3 AFTER STARTING INSPECTION 4-2.....................................

4.4 UNIT OPERATION 4-2..................................................

4.4.1 Crankcase Heater 4-2..........................................

4.4.2 Probe Check Initiation 4-2.......................................

4.4.3 Cooling -- Controller Set BELOW --10_C(+14_F), or

-- 5 _C(+23_F) optionally 4-3.....................................

4.4.4 Controller Set ABOVE --10_C(+14_F), or --5_C(+23_F) optionally 4-3

4.4.5 Heating (See Figure 4-4.) 4-10....................................

4.4.6 Defrost 4-12....................................................

4.4.7 Arctic 4-12......................................................

TROUBLESHOOTING 5-1.....................................................

5.1 UNIT WILL NOT START OR STARTS THEN STOPS 5-1....................

5.2 UNIT RUNS BUT HAS INSUFFICIENT COOLING 5-1......................

5.3 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING 5-1............

5.4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING 5-2..............

5.5 UNIT WILL NOT TERMINATE HEATING 5-2..............................

5.6 UNIT WILL NOT DEFROST PROPERLY 5-2..............................

5.7 ABNORMAL PRESSURES (COOLING) 5-3...............................

5.8 ABNORMAL NOISE OR VIBRATIONS 5-3................................

5.9 TEMPERATURE CONTROLLER MALFUNCTION 5-3......................

5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW 5-3............

5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION 5-4.................

5.12 POWER AUTOTRANSFORMER MALFUNCTION 5-4......................

5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH 5-4......

iiT-268-07

Page 7

TABLE OF CONTENTS (CONTINUED)

Section Page

SERVICE 6-1................................................................

6.1 MANIFOLD GAUGE SET 6-1............................................

6.2 SUCTION AND DISCHARGE SERVICE VALVES 6-4.......................

6.3 PUMPING THE UNIT DOWN 6-4........................................

6.4 REFRIGERANT LEAK CHECKING 6-4...................................

6.5 EVACUATION AND DEHYDRATION 6-5..................................

6.5.1 General 6-5...................................................

6.5.2 Preparation 6-5................................................

6.5.3 Procedure 6-5.................................................

6.6 REFRIGERANT CHARGE 6-5...........................................

6.6.1 Checking the Refrigerant Charge 6-5.............................

6.6.2 Adding Refrigerant to System (Full Charge) 6-8....................

6.6.3 Adding Refrigerant to System (Partial Charge) 6-8..................

6.7 COMPRESSOR -- MODEL 06DR 6-8.....................................

6.7.1 Removal and Replacement of Compressor 6-9.....................

6.8 COMPRESSOR DISASSEMBLY 6-9.....................................

6.9 COMPRESSOR REASSEMBLY 6-13......................................

6.10 COMPRESSOR OIL LEVEL 6-14.........................................

6.11 FILTER-DRIER 6-15.....................................................

6.12 HIGH PRESSURE SWITCH 6-15.........................................

6.12.1 Replacing High Pressure Switch 6-15..............................

6.12.2 Checking High Pressure Switch 6-15..............................

6.13 EVAPORATOR COIL AND HEATER ASSEMBLY 6-16.......................

6.14 EVAPORATOR COIL HEATERS 6-16......................................

6.15 EVAPORATOR FAN AND MOTOR ASSEMBLY 6-16........................

6.16 EVAPORATOR FAN MOTOR CAPACITORS 6-17...........................

6.17 CONDENSER COIL 6-18................................................

6.18 CONDENSER FAN AND MOTOR ASSEMBLY 6-18.........................

6.19 PARTLOW RECORDING THERMOMETER 6-18............................

6.20 SAGINOMIYA RECORDING THERMOMETER 6-20.........................

6.21 MAINTENANCE OF PAINTED SURFACES 6-21............................

6.22 POWER AUTOTRANSFORMER (OPTIONAL) 6-21.........................

6.23 SENSOR CHECKOUT PROCEDURE (AMBS, DTS, RRS, RTS, SRS & STS) 6-21

6.23.1 Checking Sensor (RRS, RTS, SRS or STS) 6-21....................

TABLE OF CONTENTS

6.23.2 Replacing Sensor (STS and SRS) 6-22............................

6.23.3 Replacing Sensor (RRS and RTS) 6-23............................

6.23.4 Checking Sensor (AMBS or DTS) 6-24.............................

6.23.5Replacing Sensor (AMBS or DTS) 6-24..............................

6.24 SUCTION SOLENOID VALVE (SSV) 6-25..................................

6.25 SUCTION MODULATION VALVE (SMV) 6-25...............................

iii T-268-07

Page 8

TABLE OF CONTENTS (CONTINUED)

Section Page

6.26 THERMOSTATIC EXPANSION VALVE 6-26................................

6.27 CONTROLLER/DATACORDER 6-28......................................

6.27.1 Controller/DataCORDER Programming Procedure 6-29..............

6.27.2 Controller Trouble-Shooting 6-29..................................

6.28 WATER-COOLED CONDENSER 6-30.....................................

ELECTRICAL WIRING SCHEMATIC AND DIAGRAMS 7-1........................

7.1 INTRODUCTION 7-1...................................................

INDEX Index-1...................................................................

LIST OF ILLUSTRATIONS

Figure Page

Figure 2-1 Refrigeration Unit -- Front 2-1.......................................

Figure 2-2 Refrigeration Unit -- Rear (Panels Removed) 2-3......................

Figure 2-3 Compressor Section 2-4............................................

Figure 2-4 Condenser Section 2-5.............................................

Figure 2-5 Units with Receiver 2-6.............................................

Figure 2-6 Units with Water-Cooled Condenser 2-7..............................

Figure 2-7 Control Box on Units with a Single-Speed Compressor 2-8.............

Figure 2-8 Control Box on Units with a Two-Speed Compressor (Optional) 2-9......

Figure 2-9 Power Autotransformer (Optional) 2-12................................

Figure 2-10 Refrigeration Circuit with Receiver 2-15................................

Figure 2-11 Refrigeration Circuit with Water-Cooled Condenser (Optional) 2-17.......

Figure 3-1 Micro-Link 2i Controller/DataCORDER Module 3-1.....................

Figure 3-1 Key Pad 3-4......................................................

Figure 3-2 Display Module 3-5................................................

Figure 3-3 Standard Configuration Report Sample 3-34...........................

Figure 3-4 Controller Set Point BELOW --10_C(+14_F), or

-- 5 _C(+23_F) optionally 3-35.........................................

Figure 3-5 Controller Set Point ABOVE --10_ C(+14_F), or

-- 5 _C(+23_F) optionally 3-35.........................................

Figure 3-6 Two-Speed Compressor Speed Change Logic -- Perishable Range Only 3-36

Figure 3-7 Two-Speed Compressor Speed Change Logic -- Frozen Range Only 3-37.

Figure 4-1 Cooling in High Speed with Two-Speed Compressor 4-5...............

Figure 4-2 Cooling in Low Speed with Two-Speed Compressor 4-7................

Figure 4-3 Cooling with Single-Speed Compressor 4-9...........................

Figure 4-4 Heating Mode 4-11.................................................

Figure 4-5 Defrost 4-13.......................................................

ivT-268-07

Page 9

LIST OF ILLUSTRATIONS (CONTINUED)

Figure Page

Figure 6-1 Manifold Gauge Set 6-1............................................

Figure 6-2 R-134a Manifold Gauge Set Connection 6-3..........................

Figure 6-3 Suction or Discharge Service Valve 6-4..............................

Figure 6-4 Vacuum Pump Connections 6-7.....................................

Figure 6-5 Compressor -- Model 06DR 6-9......................................

Figure 6-6 Exploded View of Valve Plate 6-10....................................

Figure 6-7 Bottom Plate Removed 6-10.........................................

Figure 6-8 Oil Pump and Bearing Head 6-11.....................................

Figure 6-9 Low Profile Gear Oil Pump 6-11......................................

Figure 6-10 Motor End Cover 6-11...............................................

Figure 6-11 Crankshaft Assembly 6-12...........................................

Figure 6-12 Removing Equalizing Tube and Lock Screw Assembly 6-12..............

Figure 6-13 Terminal Mounting Assembly 6-12....................................

Figure 6-14 Suction Valve & Positioning Springs 6-13..............................

Figure 6-15 Piston Rings 6-13...................................................

Figure 6-16 Compressor Oil Pump End View 6-14.................................

Figure 6-17 Typical Setup for Testing High Pressure Switch 6-15....................

Figure 6-18 Evaporator Fan Assembly 6-17.......................................

Figure 6-19 Partlow Recording Thermometer 6-20................................

Figure 6-20 Saginomiya Recording Thermometer 6-21.............................

Figure 6-21 Supply Sensor Positioning 6-22......................................

Figure 6-22 Sensor (RRS, RTS, SRS or STS) 6-23................................

Figure 6-23 Sensor and Cable Assembly (RRS, RTS, SRS or STS) 6-23.............

Figure 6-24 Return Sensor Positioning 6-24......................................

Figure 6-25 Sensor (AMBS or DTS) 6-24.........................................

Figure 6-26 Sensor and Wire Assembly (AMBS or DTS) 6-24.......................

Figure 6-27 Suction Solenoid Valve (SSV) -- Alco 6-25.............................

Figure 6-28 Suction Modulation Valve (SMV) 6-26.................................

Figure 6-29 Thermostatic Expansion Valve -- Alco 6-27.............................

TABLE OF CONTENTS

Figure 6-30 Thermostatic Expansion Valve Bulb 6-27..............................

Figure 6-31 Controller side of the Control Box 6-28................................

Figure 6-32 Water-Cooled Condenser Cleaning -- Forced Circulation 6-31............

Figure 6-33 Water-Cooled Condenser Cleaning -- Gravity Circulation 6-32............

Figure 6-34 R-134a Compressor Pressure and Motor Current Curves Versus

Ambient Temperature 6-37...........................................

Figures 7-1/7-68 Electrical Schematic -- See Model Chart 7-2/7-137.....................

v T-268-07

Page 10

LIST OF TABLES

Table Page

Table 1-1 Model Chart 1-2...................................................

Table 2-1 Safety and Protective Devices 2-19...................................

Table 3-1 Controller Configuration Variables 3-3................................

Table 3-2 Key Pad Function 3-4..............................................

Table 3-3 Controller Function Code Assignments 3-6...........................

Table 3-4 Controller Alarm Indications 3-11.....................................

Table 3-5 Pre-Trip Test Codes 3-19............................................

Table 3-6 DataCORDER Function Code Assignments 3-26.......................

Table 3-7 DataCORDER Alarm Indications 3-28.................................

Table 3-8 DataCORDER Alarm Configurations 3-29..............................

Table 3-9 DataCorder Standard Configuration 3-30..............................

Table 3-10 DataCORDER Pre-Trip Data 3-33....................................

Table 4-1 Electrical Control Positions -- BELOW --10_C(+14_F), or

-- 5 _C(+23_F) optionally 4-14.........................................

Table 4-2 Electrical Control Positions -- ABOVE --10_C(+14_F), or

-- 5 _C(+23_F) optionally 4-15.........................................

Table 6-1 AMBS, DTS, RRS, RTS, SRS and STS Temperature-Resistance Chart 6-32

Table 6-2 Partlow Bulb Temperature-Resistance Chart 6-32.......................

Table 6-3 Recommended Bolt Torque Values 6-33...............................

Table 6-4 Wear Limits For Compressors 6-33...................................

Table 6-5 Compressor Torque Values 6-34......................................

Table 6-6 Temperature-Pressure Chart -- R-134a 6-35............................

viT-268-07

Page 11

SECTION 1

INTRODUCTION

1.1 INTRODUCTION

WARNING

It has been determined that pressurized, air-rich mixtures of refrigerants and air can undergo combustion when exposed to an ignition source.

This manual contains Operating Data, Electrical Data and Service Instructions for the refrigeration units listed in Table 1-1. Also, Table 1-1 charts some significant differences between these models.

NOTE

Beginning with early 1995 production, in addition to a model number, Carrier Transicold began usinga parts identification(PID) number in the format NT0000. In the parts manual, the PID number is shown in boldface to point out parts variations within models. The PID number must be included when ordering and inquiring about your unit.

The unit, of lightweight aluminum frame construction, is an all electric, one piece, self-contained cooling and heating refrigeration unit. The unit is designed to fit in the frontof a container and to serve as the container front wall. Forklift pockets are provided for installation and removal of the unit.

The unit is complete with a charge of R-134a, compressor lubricating oil (approved POE SW20 compressor oil for R-134a only), mode indicating lights, and temperature controller, and is ready for operation upon installation.

Some units are equipped with a two-speed compressor that is used to enhance power saving.

Some units aredual voltage units designed to operateon 190/230 or 380/460 volts AC, 3-phase, 50-60 hertz power (refer to section 2.4). Other units are designed to operate on 380/460 volts AC, 3-phase 50/60 hertz power only. An external autotransformeris required for 190/230 vac operation (refer to Figure 2-9 and section

2.4).

Operating control power is provided by a control transformer which steps down the AC supply power source to 18 and 24 volts AC , single phase control power.

The temperature Controller/DataCORDER (Micro-Link 2i) is a micropr oce ssor- ba sed controller and a integr ate d electronic data logging device. Refer to sections 3.1 and

3.3. Once the temperature controller is set at a desired container temperature, the unit w ill operate automatically to maintain the desired temperature within very close limits. The control system automatica lly selects cooling, holding or heating as necessar y to maintain the de sir ed temperature within the container.

WARNING

Beware of unannounced start ing of the evaporator and condenser fans. Do not open the condenser fan grille before turning power OFF and disc onnecting power plug.

Some units are equipped with a mechanical temperature recorder.

Some units may have a TransFRESH controlled atmosphere system added. Contact TransFRESH Corporation, P.O. Box 1788, Salinas, CA 93902 for information on their system.

SECTION 1

1-1 T-268-07

Page 12

Table 1-1. Model Chart

PID

Schematicsand

Figure71&

Figure7-3

g69NT40-511-5

Figure7-3

g69NT40-511-8

Figure7-3

69NT4

0-511-9

Figure7-19&

Figure7-3

Condenser

MODEL

69NT40-511-1

69NT40-511-2

69NT40-511-3 NT0007 P P --- --- X --- --- X --- --- X ---

69NT40-511-4 NT0037 P X --- P X --- --- P --- --- X ---

69NT40-511-6 NT0013 P P --- --- X --- --- X --- --- --- ---

69NT40-511-7 NT0014 X P --- --- X --- --- X --- --- --- ---

69NT40-511-10

69NT40-511-11 NT0008 P X --- --- --- X A X --- P X ---

69NT40-511-12

69NT40-511-13

69NT40-511-14 NT0018 X P --- --- --- X A X --- X --- ---

69NT40-511-15

69NT40-511-16

69NT40-511-17 NT0043 X P X P X --- --- P --- --- X ---

PID

NT0001 X P X P X --- --- X --- X X ---

NT0062 X P X P X --- --- X --- X X ---

NT0002 X P X X X --- --- X --- X X ---

NT0017 X P X X X --- --- X --- X X ---

NT0011 P X --- P X --- --- P --- --- X ---

NT0038 P X --- P X --- --- P --- --- X ---

NT0099 P X --- P X --- --- P --- --- X ---

NT0005 P X --- P X --- --- P --- --- X ---

NT0037 P X --- P X --- --- P --- --- X ---

NT0094 P X --- P X --- --- P --- --- X ---

NT0064 P P --- P X --- --- P --- --- X ---

NT0089 P P --- P X --- --- P --- --- X ---

NT0152 P P --- P X --- --- P --- --- X ---

NT0024 P X --- P X --- --- P X --- X ---

NT0027 P X --- P X --- --- P X --- X ---

NT0040 P X --- P X --- --- P X --- X ---

NT0041 P X --- P X --- --- P X --- X ---

NT0104 P X --- P X --- --- P X P X ---

NT0112 P X --- P X --- --- P X P X ---

NT0173 P X --- P X --- --- P X --- X ---

NT0209 P X --- P X --- --- P X P X ---

NT0076 P P --- P X --- --- P X --- P ---

NT0082 P P --- P X --- --- P X --- P ---

NT0015 X P --- --- --- X A X --- X --- ---

NT0022 X P --- --- --- X A X --- X --- ---

NT0029 P X --- X X --- --- P --- --- X ---

NT0044 P X --- X X --- --- P --- --- X ---

NT0028 P X --- P X --- --- P --- --- X ---

NT0054 P P --- P X --- --- P --- P X ---

NT0070 P P --- P X --- --- P --- P X ---

NT0083 P P --- P X --- --- P --- P X ---

Cold

USDACTreatm

ent

ressor

nser

-Cooled

Water-CConde

peed

sformer

Tran

Two-SpComp

Coil

Discharge

y Sensor

Option

Suction &

2Row

Pressure

4Row

sFresh

Tran

Humidit

cations

CommunicInterface

odule (CI)

mperature

omiya

SaginoTem peRecor

Partlow TemRecorder

rature

der

Electrical Wiring Schematics and Diagrams

Figure 7-1 &

Figure 7-2

Figure 7-3

Figure 7-4

Figure 7-9 &

Figure 7-10

Figure 7-3

Figure 7-4

Figure 7-9 &

Figure 7-10

Figure 7-3

Figure 7-4

Figure 7-9 &

Figure 7-10

Figure 7-3 &

gure7-

Figure 7-9 &

Figure 7-10

Figure 7-19

Figure 7-20

Figure 7-3 &

gure7-

Figure 7-5 &

gure7-

Figure 7-3

Figure 7-4

Figure 7-1 &

Figure 7-2

1-2T-268-07

Page 13

Condenser

Figure7-3

Figure7-9

Figure7-3

MODEL

69NT40-511-18 NT0035 P X --- P X --- A P --- X X ---

69NT40-511-19 NT0037 P X --- P X --- --- P --- --- X ---

69NT40-511-21 NT0055 P X --- P X --- --- P X --- X ---

69NT40-511-22

69NT40-511-23

69NT40-511-24 NT0051 P P --- P X --- --- P --- P P ---

69NT40-511-25 NT0053 P P --- P X --- --- P --- --- X ---

69NT40-511-26

69NT40-511-27 NT0056 X X --- P --- X --- P --- P X ---

69NT40-511-28

69NT40-511-29

69NT40-511-30 NT0060 X --- X --- --- X A X --- X --- ---

69NT40-511-31 NT0061 P X --- P X --- --- X --- --- X ---

69NT40-511-32

69NT40-511-33

69NT40-511-34 NT0065 P P --- P X --- B P --- --- X ---

69NT40-511-35 NT0071 X P --- P --- X --- P --- P X ---

69NT40-511-36 NT0072 X --- --- --- --- X A X --- X --- ---

69NT40-511-37 NT0073 X --- --- P X --- B X X --- X ---

PID

Transformer

Two-Speed

Compressor

Two-Speed

Compressor

Water-Cooled

Condenser

Water-Cooled

USDA Cold

Treatment

USDA Cold

Treatment

NT0046 P X --- P --- X A P --- --- X ---

NT0121 P X --- P --- X A P --- --- X ---

NT0139 P X --- P --- X A P --- --- X ---

NT0252 P X --- P --- X A P --- --- X ---

NT0050 P X --- P X --- --- P --- P X ---

NT0069 P X --- P X --- --- P --- P X ---

NT0047 P P X P X --- --- P P P P ---

NT0175 P P X P X --- --- P P P P ---

NT0057 P P --- P X --- --- P X --- X ---

NT0132 P P --- P X --- --- P X P X ---

NT0059 P P --- X X --- --- X --- --- X ---

NT0219 P P --- X X --- --- X --- --- X ---

NT0343 P P --- X X --- --- X --- P X ---

NT0067 P X --- P X --- --- P --- P P ---

NT0097 P X --- P X --- --- P --- P P ---

NT0068 P X --- P X --- --- P X P --- ---

NT0239 P X --- P X --- --- P X P P ---

Condenser

Coil

TransFresh

Humidity Sensor

Suction & Discharge

Pressure Option

Suction & Discharge

Pressure Option

4Row

2Row

Communications

Interface Module (CI)

Saginomiya

Partlow Temperature

Recorder

Partlow Temperature

Recorder

Temperature

Recorder

Temperature

Recorder

Electrical Wiring

Electrical Wiring Schematics and

Schematics and Diagrams

Diagrams

Figure 7-3

Figure 7-4

Figure 7-9

Figure 7-10

Figure7-41&

Figure 7-42

Figure 7-3

Figure 7-4

Figure 7-1 &

Figure 7-2

Figure7-21&

Figure 7-22

Figure 7-3

Figure 7-4

Figure 7-9 &

Figure 7-10

Figure 7-3 &

Figure 7-4

Figure7-19&

Figure 7-20

Figure7-57&

Figure 7-58

Figure 7-7 &

Figure 7-8

Figure 7-3

Figure 7-4

Figure 7-9 &

Figure 7-10

Figure 7-3 &

Figure 7-4

Figure7-41&

Figure 7-42

Figure 7-3

Figure 7-4

Figure 7-5 &

Figure 7-6

Figure 7-3 &

Figure 7-4

SECTION 1

1-3 T-268-07

Page 14

Condenser

Figure7-11&

69NT4051138

Figure7-3

69NT4

0-511-3

Figure7-3

69NT4

0-511-4

Figure7-3

MODEL

69NT40-511-38

69NT40-511-41

69NT40-511-42 NT0088 P P --- P X --- --- P --- --- P ---

69NT40-511-43 NT0081 P P --- P X --- --- P X --- --- ---

69NT40-511-44

69NT40-511-45 NT0092 P P --- P X --- --- P X --- P ---

69NT40-511-46 NT0110 P X --- P --- X --- P --- P X ---

69NT40-511-47

69NT40-511-48 NT0101 P P --- P --- X --- P --- P X ---

PID

Transformer

Two-Speed

Compressor

Two-Speed

Compressor

Water-Cooled

Condenser

Water-Cooled

USDA Cold

Treatment

USDA Cold

Treatment

NT0074 X --- --- --- --- X A X --- X --- ---

NT0135 X --- --- --- --- X A X --- X --- ---

NT0208 X --- --- --- --- X A X --- X --- ---

NT0246 X --- --- --- --- X A X --- X --- ---

NT0253 X --- --- --- --- X A X --- X --- ---

NT0267 X --- --- --- --- X A X --- X --- ---

NT0307 X --- --- --- --- X A X --- X --- ---

NT0078 X P --- X X --- --- X --- X X ---

NT0084 X P --- X X --- --- X --- X X ---

NT0095 X P --- X X --- --- X --- X X ---

NT0079 X P --- P X --- --- X --- X X ---

NT0085 X P --- P X --- --- X --- X X ---

NT0096 X P --- P X --- --- X --- X X ---

NT0080 P P --- P X --- --- P --- P --- ---

NT0090 P P --- P X --- --- P --- P --- ---

NT0091 X X --- --- --- X A X --- P X ---

NT0102 P X --- --- --- X A X --- P X ---

NT0137 P X --- --- --- X A X --- P X ---

NT0185 P X --- --- --- X A X --- P X ---

NT0213 P X --- --- --- X A X --- P --- X

NT0244 P X --- --- --- X A X --- P --- X

NT0266 P X --- --- --- X A X --- P --- X

NT0098 P X --- X X --- B P --- P --- X

NT0124 P X --- X X --- B P --- P --- X

NT0146 P X --- X X --- B P --- P --- X

NT0186 P X --- X X --- B P --- P --- X

Condenser

Coil

TransFresh

Humidity Sensor

Suction & Discharge

Pressure Option

Suction & Discharge

Pressure Option

4Row

2Row

Communications

Interface Module (CI)

Saginomiya

Partlow Temperature

Recorder

Partlow Temperature

Recorder

Temperature

Recorder

Temperature

Recorder

Electrical Wiring

Electrical Wiring Schematics and

Schematics and Diagrams

Diagrams

Figure 7-11

Figure 7-12

Figure7-31&

Figure 7-32

Figure7-47&

gure7-

Figure7-63&

Figure 7-64

Figure 7-3

Figure 7-4

Figure 7-9 &

Figure 7-10

Figure 7-3

Figure 7-4

Figure 7-9 &

Figure 7-10

Figure 7-3 &

Figure 7-4

Figure7-65&

Figure 7-66

Figure 7-3

Figure 7-4

Figure 7-9 &

gure7-

Figure7-19&

Figure 7-20

Figure7-41&

gure7-

Figure 7-3 &

Figure 7-4

Figure 7-9 &

gure7-

Figure7-23&

Figure 7-24

Figure7-19&

Figure 7-20

Figure 7-3 &

Figure 7-4

1-4T-268-07

Page 15

Condenser

Figure7-9

Figure7-19&

69NT4051149

Figure7-41&

Figure7-9

69NT4

0-511-5

MODEL

69NT40-511-49

69NT40-511-50

69NT40-511-51

69NT40-511-52

69NT40-511-53 NT0113 P P --- P X --- --- P X P --- ---

69NT40-511-55

69NT40-511-56 NT0242 P P --- P --- X --- P X P X ---

69NT40-511-57 NT0156 P X --- P X --- --- P --- P X ---

PID

Transformer

Two-Speed

Compressor

Two-Speed

Compressor

Water-Cooled

Condenser

Water-Cooled

USDA Cold

Treatment

USDA Cold

Treatment

NT0103 P P --- P X --- --- P --- P X ---

NT0134 P P --- P X --- --- P --- P X ---

NT0184 P P --- P X --- --- P --- P X ---

NT0216 P P --- P X --- --- P --- P X ---

NT0268 P P --- P X --- --- P --- P X ---

NT0282 P P --- P X --- --- P --- P X ---

NT0283 P P --- P X --- --- P --- P --- X

NT0303 P P --- P X --- --- P --- --- --- X

NT0308 P P --- P X --- --- P --- P X ---

NT0341 P P --- P X --- --- P --- P --- X

NT0345 P P --- P --- X --- P --- P X ---

NT0106 X X --- P X --- --- X --- X --- X

NT0178 X X --- P X --- --- X --- X --- X

NT0107 X X --- P --- X A P --- --- X ---

NT0207 X X --- P --- X A P --- --- X ---

NT0417 X P --- P --- X --- P --- P --- ---

NT0109 P X --- P X --- --- P --- P X ---

NT0111 P X --- P X --- --- P --- P X ---

NT0133 P X --- P X --- --- P --- P X ---

NT0162 P X --- P X --- --- P --- P X ---

NT0225 P X --- P X --- --- P --- P X ---

NT0118 P P --- P X --- --- P --- P X ---

NT0136 P P --- P X --- --- P --- P X ---

NT0215 P P --- P X --- --- P --- P X ---

NT0120 P --- --- --- --- X --- P --- --- X ---

NT0188 P --- --- --- --- X --- P --- --- X ---

Condenser

Coil

TransFresh

Humidity Sensor

Suction & Discharge

Pressure Option

Suction & Discharge

Pressure Option

4Row

2Row

Communications

Interface Module (CI)

Saginomiya

Partlow Temperature

Recorder

Partlow Temperature

Recorder

Temperature

Recorder

Temperature

Recorder

Electrical Wiring

Electrical Wiring Schematics and

Schematics and Diagrams

Diagrams

Figure 7-9

Figure 7-10

Figure 7-19

Figure 7-20

Figure 7-41

Figure 7-42

Figure7-57&

gure7-

Figure 7-9

Figure 7-10

Figure7-13&

Figure 7-14

Figure7-45&

Figure 7-46

Figure7-67&

Figure 7-68

Figure 7-9 &

Figure 7-10

Figure 7-3 &

Figure 7-4

Figure 7-9 &

Figure 7-10

Figure7-19&

Figure 7-20

Figure7-41&

Figure 7-42

Figure 7-9 &

gure7-

Figure7-41&

Figure 7-42

Figure 7-9 &

Figure 7-10

Figure7-19&

Figure 7-20

Figure7-41&

Figure 7-42

Figure 7-9 &

Figure 7-10

SECTION 1

1-5 T-268-07

Page 16

Condenser

Figure7-9

Figure7-41&

Figure7-19&

69NT4

0-511-5

Figure7-9

Figure7-41&

Figure7-57&

MODEL

69NT40-511-58

69NT40-511-60

69NT40-511-61

69NT40-511-62 NT0127 P P --- P X --- --- P --- X X ---

69NT40-511-63

69NT40-511-64 NT0131 P X --- --- --- X A X X P X ---

69NT40-511-65 NT0119 P X --- X X --- --- P --- P X ---

69NT40-511-66

69NT40-511-67 NT0143 P P --- P X --- --- P --- --- P ---

69NT40-511-69 NT0177 P P --- P X --- --- P --- P P ---

69NT40-511-70

PID

Transformer

Two-Speed

Compressor

Two-Speed

Compressor

Water-Cooled

Condenser

Water-Cooled

USDA Cold

Treatment

USDA Cold

Treatment

NT0105 P X --- P X --- --- P --- P X ---

NT0122 P X --- P X --- --- P --- P X ---

NT0138 P X --- P X --- --- P --- P X ---

NT0141 P X --- P X --- --- P --- P X ---

NT0160 P X --- P X --- --- P --- P X ---

NT0161 P X --- P X --- --- P --- P X ---

NT0189 P X --- P X --- --- P --- P X ---

NT0240 P X --- P X --- --- P --- P X ---

NT0269 P X --- P X --- --- P --- P X ---

NT0309 P X --- P X --- --- P --- P X ---

NT0340 P X --- P X --- --- P X P P ---

NT0386 P X --- P X --- --- P X P X ---

NT0418 P X --- P X --- --- P --- P X ---

NT0428 P X --- P X --- --- P --- P --- X

NT0167 P P --- P X --- --- P --- P X ---

NT0174 P P --- P X --- --- P --- P X ---

NT0211 P P --- P X --- --- P --- P X ---

NT0272 P P --- P X --- --- P --- P X ---

NT0312 P P --- P X --- --- P --- P X ---

NT0125 X X --- P --- X A P --- --- X ---

NT0153 X X --- P --- X A P --- --- X ---

NT0126 X X --- P X --- A P --- --- X ---

NT0154 X X --- P X --- A P --- --- X ---

NT0140 X --- --- P --- X --- X X X --- ---

NT0192 X --- --- P --- X --- X X X --- ---

NT0129 P X --- X X --- --- P --- P X ---

NT0147 P X --- X X --- --- P --- P X ---

NT0241 P X --- P --- X --- X X P X ---

NT0271 P X --- P --- X --- X X P X ---

NT0311 P X --- P --- X --- X X P X ---

NT0353 P X --- P --- X --- X X P X ---

Condenser

Coil

TransFresh

Humidity Sensor

Suction & Discharge

Pressure Option

Suction & Discharge

Pressure Option

4Row

2Row

Communications

Interface Module (CI)

Saginomiya

Partlow Temperature

Recorder

Partlow Temperature

Recorder

Temperature

Recorder

Temperature

Recorder

Electrical Wiring

Electrical Wiring Schematics and

Schematics and Diagrams

Diagrams

Figure 7-9

Figure 7-10

Figure7-19&

gure7-

Figure 7-41

Figure 7-42

Figure7-57&

gure7-

Figure 7-9 &

Figure 7-10

Figure 7-19

Figure 7-20

Figure7-41&

Figure 7-42

Figure7-57&

Figure 7-58

Figure 7-9

Figure 7-10

Figure7-17&

Figure 7-18

Figure 7-9 &

Figure 7-10

Figure7-19&

Figure 7-20

Figure 7-9 &

gure7-

Figure7-19&

Figure 7-20

Figure 7-41

Figure 7-42

Figure 7-57

Figure 7-58

1-6T-268-07

Page 17

Condenser

Figure7-9

Figure7-19&

Figure7-9

Figure7-41&

MODEL

69NT40-511-71

69NT40-511-72

69NT40-511-73 NT0158 P P --- P --- X --- P --- P X ---

69NT40-511-74

69NT40-511-75 NT0163 X P --- P --- X A X --- P X ---

69NT40-511-76 NT0169 P X X P X --- B P --- P --- X

69NT40-511-77 NT0176 P X --- P X --- B P --- P X ---

69NT40-511-78 NT0182 P X --- P X --- --- X --- P X ---

69NT40-511-79 NT0190 --- X --- P X --- B P --- --- --- X

69NT40-511-80 NT0165 P P --- P X --- --- P --- P P ---

69NT40-511-81

69NT40-511-82

69NT40-511-83 NT0210 P P --- P --- X --- X --- P X ---

69NT40-511-84

69NT40-511-85

69NT40-511-87 NT0214 P P --- P X --- B P X P --- X

69NT40-511-89

PID

Transformer

Two-Speed

Compressor

Two-Speed

Compressor

Water-Cooled

Condenser

Water-Cooled

USDA Cold

Treatment

USDA Cold

Treatment

NT0166 P X --- P X --- --- P X P X ---

NT0235 P X --- P X --- --- P X P X ---

NT0157 P X --- P X --- --- P X P X ---

NT0200 P X --- --- X --- --- P X P X ---

NT0159 P P --- P X --- --- P --- P X ---

NT0223 P P --- P X --- --- P --- P X ---

NT0151 P X --- P X --- --- P --- P X ---

NT0168 P X --- P X --- --- P --- P X ---

NT0180 P X --- P X --- --- P --- P X ---

NT0236 P X --- P X --- --- P --- P X ---

NT0258 P X --- P X --- --- P --- P X ---

NT0187 P X --- P X --- A P X P X ---

NT0198 P X --- P X --- A P X P X ---

NT0199 P X --- P X --- A X X P X ---

NT0191 --- --- --- X --- X --- P --- P P ---

NT0201 --- --- --- X --- X --- P --- P --- ---

NT0334 --- --- --- X --- X --- P --- P --- ---

NT0183 X --- --- X --- X A P --- X --- ---

NT0226 X --- --- X --- X A X --- X --- ---

NT0280 X --- --- X --- X A X --- X --- ---

NT0317 X --- --- X --- X A X --- X --- ---

NT0212 X P --- P X --- --- P --- P P ---

NT0243 X P --- P X --- --- P --- P P ---

Condenser

Coil

TransFresh

Humidity Sensor

Suction & Discharge

Pressure Option

Suction & Discharge

Pressure Option

4Row

2Row

Communications

Interface Module (CI)

Saginomiya

Partlow Temperature

Recorder

Partlow Temperature

Recorder

Temperature

Recorder

Temperature

Recorder

Electrical Wiring

Electrical Wiring Schematics and

Schematics and Diagrams

Diagrams

Figure7-19&

Figure 7-20

Figure7-41&

Figure 7-42

Figure7-25&

Figure 7-26

Figure7-33&

Figure 7-34

Figure 7-9

Figure 7-10

Figure 7-19

Figure 7-20

Figure7-15&

Figure 7-16

Figure 7-9

Figure 7-10

Figure7-39&

Figure 7-40

Figure 7-9

Figure 7-10

Figure7-19&

Figure 7-20

Figure 7-9 &

Figure 7-10

Figure 7-41

Figure 7-42

Figure7-31&

Figure 7-32

Figure7-27&

Figure 7-28

Figure7-35&

Figure 7-36

Figure7-43&

Figure 7-44

Figure7-19&

Figure 7-20

Figure7-41&

Figure 7-42

Figure7-57&

Figure 7-58

Figure7-31&

gure7-

Figure7-55&

Figure 7-56

Figure7-41&

gure7-

SECTION 1

1-7 T-268-07

Page 18

Condenser

Figure7-51&

Figure7-29&

69NT4051194

69NT40-511-95

69NT4

0-511-101

Figure7-41&

Figure7-57&

MODEL

69NT40-511-90 NT0222 P P --- P X --- --- P --- P X ---

69NT40-511-91

69NT40-511-92 NT0218 P X --- --- --- X A X X P --- X

69NT40-511-93 NT0197 X --- --- P --- X --- X X X --- ---

69NT40-511-94

69NT40-511-95

69NT40-511-96 NT0224 P X --- P --- X B P --- --- --- X

69NT40-511-97 NT0228 P P --- P --- X --- P --- P X ---

69NT40-511-98 NT0297 P X --- P X --- --- X --- P --- X

69NT40-511-99 NT0245 X P --- P X --- --- X --- X --- X

69NT40-511-100 NT0247 P X --- P --- X --- X --- P X ---

69NT40-511-102

69NT40-511-103 NT0259 P P --- P --- X --- X X P P ---

69NT40-511-104 NT0260 P X --- P X --- --- X --- --- X ---

69NT40-511-105 NT0274 X X --- P --- X A P --- --- X ---

69NT40-511-106

PID

Transformer

Two-Speed

Compressor

Two-Speed

Compressor

Water-Cooled

Condenser

Water-Cooled

USDA Cold

Treatment

USDA Cold

Treatment

NT0202 --- --- --- P --- X --- P --- P --- ---

NT0238 --- --- --- P --- X --- P --- P --- ---

NT0278 --- --- --- P --- X --- P --- P --- ---

NT0318 --- --- --- X --- X --- P --- P --- ---

NT0204 X --- --- P --- X --- X X X --- ---

NT0262 X --- --- P --- X --- X --- X --- ---

NT0265 X --- --- P --- X --- X --- X --- ---

NT0220 P P --- P --- X --- P --- P P ---

NT0322 P P --- P --- X --- P --- P X ---

NT0344 P P --- P --- X --- P --- P X ---

NT0365 P P --- P --- X --- P --- X P ---

NT0285 P P --- P --- X --- P --- P X ---

NT0322 P P --- P --- X --- P --- P X ---

NT0250 --- X --- P X --- B P --- --- --- X

NT0298 --- X --- P X --- B P --- --- --- X

NT0333 --- X --- P X --- B P --- --- --- X

NT0251 P P --- P X --- --- P --- P P ---

NT0254 P P --- P X --- --- P --- P P ---

NT0263 X P --- P X --- --- X --- P X ---

NT0414 X P --- P --- X --- X --- P X ---

NT0415 X P --- P --- X --- X X P X ---

Condenser

Coil

TransFresh

Humidity Sensor

Suction & Discharge

Pressure Option

Suction & Discharge

Pressure Option

4Row

2Row

Communications

Interface Module (CI)

Saginomiya

Partlow Temperature

Recorder

Partlow Temperature

Recorder

Temperature

Recorder

Temperature

Recorder

Electrical Wiring

Electrical Wiring Schematics and

Schematics and Diagrams

Diagrams

Figure7-19&

Figure 7-20

Figure7-37&

Figure 7-38

Figure 7-51

Figure 7-52

Figure7-61&

Figure 7-62

Figure7-41&

Figure 7-42

Figure 7-29

Figure 7-30

Figure7-19&

Figure 7-20

Figure7-57&

gure7-

Figure7-41&

gure7-

Figure7-57&

Figure 7-58

Figure7-41&

gure7-

Figure7-57&

Figure 7-58

Figure 7-41

Figure 7-42

Figure7-53&

Figure 7-54

Figure7-41&

Figure 7-42

Figure 7-57

Figure 7-58

1-8T-268-07

Page 19

Condenser

Figure7-49&

Figure7-59&

Figure7-41&

69NT4

0-511-111

Figure7-41&

69NT4051111

Figure7-57&

Figure7-41&

Figure7-57&

MODEL

69NT40-511-107

69NT40-511-108 NT0264 P P --- P --- X --- X X P X ---

69NT40-511-109 NT0284 P P --- P --- X --- X X P X ---

69NT40-511-110

69NT40-511-112

69NT40-511-113 NT0294 P X --- X --- X --- X X P X ---

69NT40-511-114

69NT40-511-115

69NT40-511-116 NT0302 X P --- P X --- --- P --- P --- ---

69NT40-511-117 NT0348 X P --- P --- X --- X --- P X ---

69NT40-511-118

69NT40-511-119 NT0389 P X --- P --- X --- P --- P X ---

69NT40-511-120 NT0410 --- P --- P X --- --- X --- --- --- ---

69NT40-521-10 NT0108 X X --- P X --- --- X --- X --- X

PID

Transformer

Two-Speed

Compressor

Two-Speed

Compressor

Water-Cooled

Condenser

Water-Cooled

USDA Cold

Treatment

USDA Cold

Treatment

NT0275 P X --- P --- X A X X P X ---

NT0277 P X --- P --- X A X X P X ---

NT0315 P X --- P --- X A X X P X ---

NT0354 P X --- P --- X A X X P X ---

NT0381 P X --- P --- X X X X P X ---

NT0385 P X --- P --- X X X X P X ---

NT0288 X X --- P --- X --- X X P X ---

NT0296 X X --- P --- X --- X X P --- X

NT0347 X P --- P --- X --- X X P X ---

NT0349 X X --- P --- X --- X X P X ---

NT0286 X X --- X --- X --- X X P X ---

NT0295 X X --- X --- X --- X X P --- X

NT0429 X P --- X --- X --- X --- P X ---

NT0289 P P --- P X --- --- P --- --- X ---

NT0325 P P --- P X --- --- P --- --- X ---

NT0290 P P --- P --- X --- X X P X ---

NTO326 P P --- P --- X --- X X P X ---

NT0335 P --- --- --- --- X --- X --- P X ---

NT0336 P --- --- --- --- X --- X --- X X ---

NT0358 P P --- P --- X --- X X P X ---

NT0299 P X --- P --- X A X --- P X ---

NT0300 P X --- P --- X --- X --- P X ---

NT0387 P P --- P --- X --- P --- P X ---

NT0388 P P --- P --- X --- P --- P X ---

Condenser

Coil

TransFresh

Humidity Sensor

Suction & Discharge

Pressure Option

Suction & Discharge

Pressure Option

4Row

2Row

Communications

Interface Module (CI)

Saginomiya

Partlow Temperature

Recorder

Partlow Temperature

Recorder

Temperature

Recorder

Temperature

Recorder

Electrical Wiring

Electrical Wiring Schematics and

Schematics and Diagrams

Diagrams

Figure 7-49

Figure 7-50

Figure 7-59

Figure 7-60

Figure 7-41

Figure 7-42

Figure 7-41

Figure 7-42

Figure7-57&

Figure 7-58

Figure7-41&

Figure 7-42

Figure7-57&

Figure 7-58

Figure 7-41

Figure 7-42

Figure 7-57

Figure 7-58

Figure 7-41

Figure 7-42

Figure 7-57

Figure 7-58

Figure 7-9 &

Figure 7-10

SECTION 1

A -- Factory Installed Pressure Gauges B -- Factory Installed Pressure Transducers. P -- Provision. X -- Features that apply to model.

1-9 T-268-07

Page 20

SECTION 2

DESCRIPTION

2.1 GENERAL DESCRIPTION

a. Refrigeration Unit -- Front Section

The front section of the refrigeration unit shows access to most parts of t he unit (i.e., compressor, condenser, receiver, etc.), which will be discussed in more detail of the following sections in 2.1. The upper access panels

allow front entry into the evaporator section, and the center access panel allows access to the thermostatic expansion valve and evaporator coil heaters. The unit model number, serial number and parts identification number willbe found on the frontof the unit to theleft of the compressor.

1. Access Panel (For Evap. Fan Motor #1)

2. Access Panel (For Heater & Thermostatic Expansion Valve)

3. Fork Lift Pockets

4. Unit Serial Number, Model Number and Parts Identification Number (PID) Plate

5. TransFRESH Communications Connector (TCC)

-- Optional

SECTION 2

6. Interrogator Connector (Also see Figure 2-7)

7. Mechanical Recording Thermometer -- Optional -(Partlow or Saginomiya)

8. Lower Fresh Air Makeup Vent or Blank Plate -Optional

9. Upper Fresh Air Makeup Vent and Access Panel

(For Evap. Fan Motor #2)

10. Return Air Thermometer Port -- Optional

Figure 2-1. Refrigeration Unit -- Front

2-1 T-268-07

Page 21

b. Evaporator Section

The evaporator section contains the optional mechanical temperature recording bulb, return recorder sensor (RRS), return temperature sensor (RTS), thermostatic expansion valve, dual-speed evaporator fan motors and fans (2), evaporator coil and heaters, drain pan and heater, defrost termination sensor, heat termination thermostat, and heat exchanger. See Figure 2-2 and Figure 2-5 for sensor locations.

When transporting perishable (chilled) commodities, the fan motors will normally be in high speed above

-- 1 0 _C(+14_ F), or --5_C(+23_F) optiona lly.

The evaporator coil heaters are accessible by removing the front lower access panel. The defrost termination sensor (DTS) is located on the coil center tube sheet and may be serviced by removing the upper rear panel, or by removing the left front upper access panel, disconnecting the evaporator fan connector and reaching through the access panel opening.

The evaporator fans circulate air throughout the container by pulling air in the top of the refrigeration unit, directing the air through the evaporator coil where it is either heated or cooled, and discharging t he air through the bottom of the refrigeration unit into the container.

WARNING

Before servicing unit, make sure the unit circuit breakers (CB-1 & CB-2) and the start-stop switch (ST) are in the OFF position. Also disconnect power plug and cable.

2-2T-268-07

Page 22

17 16 15

SECTION 2

1. Evaporator Fan Motor #1 (EM1)

2. Humidity Sensor (HS) -- Optional

3. Return Recorder Sensor (RRS)

4. Return Temperature Sensor (RTS)

5. Mechanical Recording Thermometer Bulb

6. Mechanical Recording Thermometer Bulb -Used on PID NT0073

7. Evaporator Fan Motor #2 (EM2)

8. Defrost Termination Sensor (DTS)

9. Heater Termination Thermostat (HTT)

Figure 2-2. Refrigeration Unit -- Rear (Panels Removed)

10. Evaporator Coil

11. Drain Pan Heater (DPH)

12. Thermostatic Expansion Valve

13. Heat Exchanger

14. Interrogator Receptacle (IC) -- Optional

15. USDA Probe Receptacle (PR2) -- Optional

16. USDA Probe Receptacle (PR1) -- Optional

17. USDA Probe Receptacle (PR3) -- Optional

18. Cargo Probe Receptacle (PR4) -- Optional

19. Evaporator Coil Heaters

2-3 T-268-07

Page 23

c. Compressor Section

The compressorsection includes thecompressor, power cable storagecompartment, and an optionaltransformer (refer to Table 1-1 and Figure 2-9), which is located to

the left of the compressor.

This section also contains the optional discharge/suction pressure transducers.

1. Power Autotransformer -- Optional

2. Power Cables and Plug

3. Compressor Sight Glass View Port

4. Compressor Guard

5. Suction/Discharge Pressure Gauges -- Optional

6. Suction Service Valve

Figure 2-3. Compressor Section

7. Compressor Crankcase Heater (CCH) -- Optional

8. Compressor Motor (CP)

9. Discharge Service Valve

10. Discharge Pressure Transducer (DPT) -- Optional

11. Suction Pressure Transducer (SPT) -- Optional

2-4T-268-07

Page 24

d. Condenser Section

The condensing section consists of a condenser fan motor, a condenser fan and an air-cooledcondenser coil.

When the unit is operating, air is pulled in the bottom of the coil and discharged horizontally out through the front of the condenser fan grille.

1. Grille and Venturi Assembly

2. Retaining Screw

3. Condenser Fan

4. Key

SECTION 2

5. Condenser Fan Motor (CM)

6. Condenser Coil Cover

7. Condenser Coil

8. Condenser Motor Mount Bracket

Figure 2-4. Condenser Section

2-5 T-268-07

Page 25

e. Receiver Section

discharge pressure regulator valve.

The receiver section consists of quench expansion valve, manual liquid line valve, filter-drier, receiver with sight glass/moisture-liquid indicator, condenser pressure transducer (CPT), fusible plug, suction modulation valve, suction solenoid valve, and

The supply temperature sensor (STS), supply recorder sensor (SRS) and ambient sensor (AMBS) are located at the right side of the compressor.

1. Discharge Pressure Regulator Valve

2. Suction Modulation Valve (SMV)

3. Schrader Valve

4. Supply Air Thermometer Port -- Optional

5. Suction Solenoid Valve (SSV)

6. Quench Expansion Valve

7. Electro-Coated Modular Receiver

8. Sight Glass

9. Fusible Plug

10. Condenser Pressure Transducer (CPT) --

Figure 2-5. Units with Receiver

Located on back side of Receiver)

11. Sight Glass/Moisture Indicator

12. Filter-Drier

13. Manual Liquid Line Valve

14. Ambient Sensor (AMBS)

15. Supply Temperature Sensor (STS)

16. Supply Recorder Sensor (SRS)

17. High Pressure Switch (HPS)

18. Thermistor Sensor (CPDS)

19. Thermistor Sensor (CPSS)

2-6T-268-07

Page 26

f. Water-Cooled Condenser Section (Optional)

The water-cooled condenser section consists of water-cooled condenser, sight glass, moisture-liquid indicator, quench expansion valve, rupture disc, condenser pressure transducer (CPT), filter-drier, suction modulation valve, suction solenoid valve,

discharge pressure regulator valve, water hook-up couplings and water pressure switch.

The supply temperature sensor (STS), supply recorder sensor (SRS) and ambient sensor (AMBS) are located at the right side of the compressor.

SECTION 2

1. Discharge Pressure Regulator Valve

2. Suction Modulation Valve (SMV)

3. Schrader Valve

4. Rupture Disc

5. Condenser Pressure Transducer (CPT)

6. Suction Solenoid Valve (SSV)

7. Quench Expansion Valve

8. Filter-Drier

9. Manual Liquid Line Valve

10. Moisture-Liquid Indicator

Figure 2-6. Units with Water-Cooled Condenser

11. Supply Air Thermometer Port -- Optional

12. Coupling (Water In)

13. Self Draining Coupling (Water Out)

14. Water Pressure Switch (WPS)

15. Sight Glass

16. Water-Cooled Condenser

17. Supply Recorder Sensor (SRS) -- Optional

18. Supply Temperature Sensor (STS)

19. Ambient Sensor (AMBS)

2-7 T-268-07

Page 27

g. Control Box with a Single-Speed Compressor

The control box includes the manual switches, circuit breaker(s), contactors, transformer, fuses, key pad, display module, current sensor module,

1345610

Controller/DataCORDER module (See Figure 2-7), an optional remote monitoring unit (CI), and an optional emergency bypass cooling switch (EB), emergency defrost switch (ED) and emergency defrost fuse (FED).

7 8 9

151718 16

1. Compressor Contactor (CH)

2. Hour Meter (HM) -- Optional

3. Heat Contactor (HR)

4. Display Module

5. Remote Monitoring Unit (RMU) -- Optional

6. Controller/DataCORDER Module

7. Emergency Bypass Cooling Switch (EB)--Optional

8. Emergency Defrost Fuse (FED) -- Optional

9. Emergency Defrost Switch (ED) -- Optional

10. Key Pad

11. Start-Stop Switch (ST)

12. Remote Monitoring Receptacle (RM) -- Optional

Figure 2-7. Control Box on Units with a Single-Speed Compressor

13. Manual Defrost Switch (MDS)

14. Condenser Fan Switch (CFS) -- Optional

15. Controller/DataCORDER Battery Pack -- Optional

16. Interrogator Connector -- Optional location for some models

17. Control Transformer (TR)

18. Evaporator Fan Contactor (EF) High Speed

19. Evaporator Fan Contactor (ES) Low Speed

20. Condenser Fan Contactor (CF)

21. Circuit Breaker (CB-1) -- 460V

22. Current Sensor Module (CS)

2-8T-268-07

13 1219202122

Page 28

h. Control Box with a Two-Speed Compressor (Optional)

The control box includes the manual switches, circuit breaker(s), contactors, transformer, fuses, key pad,

CAUTION: DO NOT MANUALLY

ENGAGE CONTACTORS

display module, current sensor module, Controller/DataCORDER module (See Figure 2-8), and an optional remote monitoring unit (CI).

1. Compressor Contactor (CH) High Speed

2. Compressor Contactor (CL) Low Speed

3. Compressor Contactor (SC) Shorting

4. Heat Contactor (HR)

5. Display Module

6. Remote Monitoring Unit (RMU) -- Optional

7. Controller/DataCORDER Module

8. Key Pad

9. Start-Stop Switch (ST)

Figure 2-8. Control Box on Units with a Two-Speed Compressor (Optional)

10. Manual Defrost Switch (MDS)

11. Remote Monitoring Receptacle (RM) -- Optional

12. Controller/DataCORDER Battery Pack -- Optional

13. Control Transformer (TR)

14. Evaporator Fan Contactor (EF) High Speed

15. Evaporator Fan Contactor (ES) Low Speed

16. Condenser Fan Contactor (CF)

17. Circuit Breaker (CB-1) -- 460V

18. Current Sensor Module (CS)

SECTION 2

2-9 T-268-07

Page 29

2.2 REFRIGERATION SYST EM DATA

Weight(

Dry)

i.Compressor/MotorAssembl

k.H

l.H

igh

UnitConf

ibleP

p.RuptureDisc

q.CondenserPressure

s.WaterPressureSwitch

Number of Cylinders 6 Model 06DR CFM 41

118 kg (260 lb) - Single-Speed

129.39 kg (285.25 lb) - Two-Speed Approved Oil Castrol Icematic -- SW20 Oil Charge 3.6 liters (7.6 U.S. pints)

The oil level range, with the compressor off,

should be between the bottom and one-eighth

level of the capacity of the sight glass.

4.48 to 6.67 _C(8to12_F)

Charge Requirements -- R-134a

2* row condenser 4* row condenser

4.5kg(9.0lbs) 5.22 kg (11.5 lbs)

j. Expansion Valve Superheat

eaterTermination

ressureSwitc

m. Refrigerant Charge

ermostat

Oil Sight Glass

Verify at --18 _C (0 _F) container box temperature

Opens 54 (¦ 3) _C = 130 (¦ 5) _F Closes 38 (¦ 4) _C = 100 (¦ 7) _F Cutout 25 (¦ 1.0) kg/cm@ = 350 (¦ 10) psig Cut-In 18 (¦ 0.7) kg/cm@ = 250 (¦ 10) psig

guration

Water-Cooled Condenser

Receiver 3.74 kg (8.25 lbs) 4.88 kg (10.75 lbs)

* RefertoTable1-1.

NOTE

When replacing the components (n.), (o.) and (p.) in section 2.2, refer to the installation instructions included with the ordered new part for additional information.

n.Fus

o. Sight Glass/Moisture Indicator Torque 8.9 to 9.7 mkg (65 to 70 ft-lbs)

p. Rupture Disc

. Condenser Pressure

Transducer (CPT)

r. Unit Weight Refer to unit model number plate, see Figure 2-1 for location of plate.

s. Water Pressure Switch

(Optional)

Melting point 99 _C = (210 _F) Torque 6.2 to 6.9 mkg (45 to 50 ft-lbs)

Bursts at 35 5% kg/cm@ = (500 5% psig) Torque

(P/N 14-00215-03) Torque

(P/N 14-00215-04)

Condenser Fan Starts

Condenser Fan Stops

Cut-In 0.5 ¦ 0.2 kg/cm@ (7 ¦ 3psig)

Cutout 1.6 ¦ 0.4 kg/cm@ (22 ¦ 5psig)

The condenser fan will start if the condenser

pressure is greater than 14.06 kg/cm@ (200

psig) OR the condenser fan is OFF for more

The condenser fan will stop if the condenser pressure is less than 9.14 kg/cm@ (130 psig)

AND the condenser fan remains ON for at least

1.4to2 mkg(10to15ft-lbs)

6.2 to 6.9 mkg (45 to 50 ft-lbs)

than 60 seconds.

30 seconds.

2-10T-268-07

Page 30

2.3 ELECTRICAL DATA

a.CircuitBreake

Mot

d.DrainPanH

Heat

f.EvaporatorFan

CB-1 Trips at 29 amps

a. Circuit Breaker

b. Compressor

Motor

c. Condenser Fan

eaters

e. Evaporator Coil

ers

Motor(s)

g.Fuses

h. Compressor Crankcase Heater (CCH) --

Optional

CB-2 (50 amp) Trips at 62.5 amps CB-2 (70 amp) Trips at 87.5 amps

Full Load Amps (FLA)

Full Load Amps 1.3 amps 1.6 amps Horsepower 0.43 hp 0.75 hp Rotations Per Minute 1425 rpm 1725 rpm Voltage and Frequency 360 -- 460 vac ¦ 1.25 hz 400 -- 500 vac ¦ 1.5 hz Bearing Lubrication Factory lubricated, additional grease not required. Rotation Counter-clockwise when viewed from shaft end. Number of Heaters 1 Rating 750 watts +5 /--10 % @ 460 vac Resistance (cold) 285 ¦ 7.5% ohms nominal Type Sheath Number of Heaters 4 Rating 750 watts +5/--10% each @ 230 vac Resistance (cold) 66.8 to 77.2 ohms Ambient @20_C(68_F) Type Sheath

Full Load Amps -- High Speed

Full Load Amps -- Low Speed

Nominal Horsepower -High Speed

Nominal Horsepower -Low Speed

Rotations Per Minute -High Speed

Rotations Per Minute -Low Speed

Voltage and Frequency 360 -- 460 vac ¦ 1.25 hz 400 -- 500 vac ¦ 1.5 hz Voltage and Frequency --

using modular transformer Bearing Lubrication Factory lubricated, additional grease not required Rotation Clockwise when viewed from shaft end. Control Circuit 15 amps (F3) Controller/DataCORDER 5amps(F1&F2)

17.6 amps @ 460 vac

(with current limiting set at 21 amps)

380 vac, 3 Phase, 50 hz 460 vac, 3 Phase, 60 hz

1.6 amps 2.0 amps

0.8 amps 1.0 amps

0.70 hp 0.84 hp

0.09 hp 0.11 hp

2850 rpm 3450 rpm

1425 rpm 1750 rpm

180 -- 230 vac ¦ 1.25 hz 200 -- 250 vac ¦ 1.5 hz

180 watts @ 460 vac

SECTION 2

2-11 T-268-07

Page 31

i. HumiditySensor

i.HumiditySenso

()p

(HS) -- Optional

Orange wire Power Red wire Output Brown wire Ground Input voltage 5vdc Output voltage 0to3.3vdc

Output voltage readings verses relative humidity (RH) percentage:

30% 0.99 V 50% 1.65 V 70% 2.31 V 90% 2.97 V

2.4 POWER AUTOTRANSFORMER (Optional)

WARNING

Do not attempt to remove power plug(s) before turning OFF start-stop switch (ST), unit circuit breaker(s) and external power source.

Make sure the power plugs are clean and dry before connecting to any power receptacle.

a. Step-Up Power Autotransformer

The modular transformer (if equipped) is located under the condenser coil on the left-hand side of the unit (see Figure 2-9).

The modular transformer (item 1, Figure 2-9) provides 380/460 vac, 3-phase, 50/60 hertz power to the unit when the 230 vac (black) power cable is connected to a 190/230 vac, 3-phase power source. The module, in addition to thetransformer, includesa 230 vac cable and a receptacle to accept the unit 460 vac power plug. The modular transformer may be equipped with an optional circuit breaker (CB-2).

WARNING

2. Plug the 230 vac (black) cable into a de-energized 190/230 vac, 3-phase power source. Energize the power source. Set circuit breaker (CB-2 if equipped) to position “1” (ON). C lose and secure control box door and place the start-stop switch (ST) in position “1” (ON) to start the unit.

c. To Operate Unit on 380/460 vac Power Supply

1. Make sure start-stop switch (ST, on control panel) and circuit breaker (CB-1, in the control box) are in position “0” (OFF).

2. Plug the 460 vac (yellow) cable into a de-energized 380/460 vac, 3-phase power source. Energize the power source. Place circuit breaker (CB-1) in position “1” (ON). Close and secure control box door and then place the start-stop switch (ST) in position “1” (ON) to start the unit.

Do not attempt to unplug the power cable connected to the autotransformer before performing the following operations: Move the start-stop switch (ST), the unit circuit

breaker(s), CB-1 and CB-2 (if equipped) and any external power source to their OFF positions.

b. To Operate Unit on 190/230 vac Power Supply

1. Make sure that the start-stop switch (ST, on control panel) and circuit breaker (CB-2 if equipped, on the modular transformer) are in position “0” (OFF). Make sure the 460 vac power plug is locked into the

1. Dual Voltage Modular Transformer

2. Circuit Breaker (CB-2) 230V (Optional)

3. 460 vac Power Receptacle

receptacle on the modular transformer and circuit breaker (CB-1, in the control box) is in position “1” (ON).

2-12T-268-07

Figure 2-9. Power Autotransformer (Optional)

Page 32

2.5 UPPER FRESH AIR MAKEUP VENT

The purpose of t he fresh air makeup vent is to provide ventilation for commodities that require fresh air circulation. The vent must be closed when transporting frozen foods or controlled atmosphere loads.

Air exchange depends on static pressure differential, which will vary depending on the container and how the container is loaded. The chart below gives air exchange values for an empty container. Higher values can be expected for a fully loaded container.

arrow on the disc with the percentage of desired air flow marked on the supplied label (see Figure 2-1).

2.6 LOWER FRESH AIR MAKEUP VENT (Optional)

The purpose of the lower fresh air makeup vent is to provide ventilation for commodities that require fresh air circulation. The vent must be closed when transporting frozen foods.

ZERO EXTERNAL STATIC PRESSURE, 50HZ POWER

AIR

FLOW

(CMH)

225

200

175

150

125

100

0 102030405060708090100

PERCENT OPEN

For 60HZ operation multiply air flow values from curve by 1.2

a. Full Open or Closed Positions

T-B AR

2-3/8 ”

Air exchange depends on static pressure differential, which will vary depending on the container and how the container is loaded. The chart across gives air exchange values for an empty container. Higher values can be expected for a fully loaded container.

a. Full Open or Closed Positions

The air slide is supplied with two adjustable air control discs. The fresh air makeup can be adjusted for 15, 35, 50 and 75cubic meters perhour (CFM). The airflow has been established at 60 Hz power, and a 2 1/2 inch T bar, with 15 mm (0.6 inch) H

O external static above free

blow.

Maximum air flow is achieved by loosening the hex nuts and rotating each disc to the maximum open position (100% open). The closed position is 0% air flow.

The operator may also adjustthe openings to increase or decrease the air flow volume to meet the required air flow.

NOTE

SECTION 2

Maximum air flow is achieved by loosening the wing nut and rotating the disc to the maximum open position (100% open). The closed position is 0% air flow.

Two slots and a stop are designed into the disc for air flow adjustments. The first slot allows for a 0 t o 30% air flow, and the second slot allows for a 30 to 100% air flow. To increase the percentage of air flow, the wing nut must be loosened, and the disc rotated until the desired percentage of air flow matches with the arrow on the disc. Tighten the wing nut. To clear the gap between the slots, loosen the wing nut until the disc clears the stop, and rotate the disc for the second slot.

The operator may also increase or decrease the air flow volume to meet the required air flow by aligning the

The main air slide is in the fully closed position during reduced air flow operation.

a. Air Sampling for Carbon Dioxide (CO2) Level

Loosen hex nuts and move the cover until the arrow on the cover is aligned with the “atmosphere sampling port” label. Tighten the hex nuts and attach a 3/8 hose to the sampling port.

If the internal atmosphere content has reached an unacceptable level, the operator may adjust the disc opening to meet the required air flow volume to ventilate the container.

2-13 T-268-07

Page 33

2.7 REFRIGERATION CIRCUIT WITH RECEIVER

Starting at the compressor, the suction gas is compressed to a higher temperature and pressure.

When operating with the air-cooled condenser, the gas flows through the discharge service valve into the pressure regulator valve that is normally open. The pressure regulator valve restricts the flow of refrigerant to maintain a minimum discharge pressureof 5 kg/cm@ (70 psig). Refrigerant gas thenmoves into the air-cooled condenser. Air flowing across the coil fins and tubes cools the gas to saturation temperature. By removing latent heat, the gas condenses to a high pressure/high temperature liquid and flows to the receiver which stores the additional charge necessary for low temperature operation.

From the receiver, the liquid refrigerant continues through the manual liquid line valve, t he filter-drier (which keeps refrigerant clean and dry), and a heat exchanger that increases subcooling of liquid refrigerant to the thermostatic expansion valve. As the liquid refrigerant passes through the orifice of the expansion valve, some of it vaporizes into a gas (flash gas). Heat is absorbed from the return air by the balance of the liquid, causing it to vaporize in the evaporator coil. The vapor then flows through the suction modulation valve (and suction solenoid valve under some conditions) to the compressor.

The thermostatic expansion valve bulb on the suction line near the evaporator coil outlet controls the thermostatic expansion valve, maintaining a constant

superheatat the coil outlet regardless of loadconditions, except at abnormally high container temperatures such as during pulldown (valve at maximum operating pressure condition).

NOTE

A pressure control system has been incorporated by means of a condenser pressure transducer (CPT) and condenser pressure control (CPC) logic to maintain discharge pressures above 130 psig in low ambients.

Regardless of pressure, CPC will be disabled at every compressor start-up, 15 seconds before the compressor is energized and 30 seconds after. An exception, for two-speed compressor units, is the low speed to high speed switching sequence, where CPC will be disabled while SMV is at 0% during the entire switching sequence for a total of 47 seconds.

a. At ambients below 27_C(80_F), the condenser fan will cycle on/off depending on condenser pressure and on/off times.

1. The condenser fan will start if the condenser

pressure is greater than 200 psig OR the condenser fan is OFF for more than 60 seconds.

2. The condenser fan will stop if the condenser

pressure is less than 130 psig AND the condenser fan remains ON for at least 30 seconds.

b. At ambients above 27_C(80_F), condenser pressure control (CPC) is disabled and the condenser fan runs continuously.

2-14T-268-07

Page 34

1. Suction Service Valve

2. Discharge Service Valve

3. Discharge Pressure Regulator Valve

4. Air-Cooled Condenser

5. Evaporator

6. Thermostatic Expansion Valve

7. External Equalizer Line

8. Thermostatic Expansion Valve Bulb

9. Heat Exchanger

10. Fusible Plug (Located on back of receiver)

Figure 2-10. Refrigeration Circuit with Receiver

1415

11. Sightglass

12. Condenser Pressure Transducer (CPT)

(Located on the back-side of the receiver)

13. Sight Glass/Moisture Indicator

14. Electro-Coated Modular Receiver

15. Manual Liquid Line Valve

16. Filter-Drier

17. Quench Expansion Valve

18. Suction Solenoid Valve

19. Suction Modulation Valve

SECTION 2

2-15 T-268-07

Page 35

2.8 REFRIGERATION CIRCUIT WITH THE WATER-COOLED CONDENSER (Optional)

Starting at the compressor, the suction gas is compressed to a higher temperature and pressure.

When operating with the water-cooled condenser, the gas flows through the discharge service valve into the pressure regulator valve that is normally open. The pressure regulator valve may restrict the flow of refrigerant to maintain a minimum discharge pressure of 5 kg/cm@ (70 psig).

Refrigerant gas then moves through the air-cooled coil to the water-cooled condenser. As the refrigerant flows across the water chilled coiled tube bundle, it is cooled to saturation temperature and exits the condenser as a high pressure/saturated liquid.

From the water-cooled condenser, the liquid refrigerant continues through the manual liquid line valve, the filter-drier (which keeps refrigerant clean and dry), a moisture-liquid indicator, and a heat exchanger that increases subcooling of liquid refrigerant to the thermostatic expansion valve. As the liquid refrigerant passes through the orifice of the expansion valve, some of it vaporizes into a gas (flash gas). Heat is absorbed from thereturn air by thebalance of t he liquid, causing it to vaporize in the evaporator coil. The vapor then flows through the suction modulation valve (and suction solenoid valve under some conditions) to the compressor.

The thermostatic expansion valve bulb (on the suction line near the evaporator coil outlet) controls the thermostatic expansion valve, maintaining a constant superheat at the coil outlet regardless of load conditions except at abnormally high container temperatures such as during pulldown (valve at maximum operating pressure condition).

2.9 WATER-COOLED CONDENSER (Optional)

The water-cooledcondenser is used when coolingwater is available and heating the surrounding air is objectionable, such as in a ship’s hold.

The water-cooled condenser is of the shell and coil type, with water circulating through the cupro-nickel coil. The refrigerant vapor is admitted to the shell side and is condensed on the outer surface of the coil.

2.9.1 Water--Cooled Condenser with Water

Pressure Switch (WP)

For operation of the refrigeration unit w ith the water-cooled condenser, do the following:

a. Connect the water supply line to the inlet side of

condenserand the dischargeline to the outlet side of the condenser.

b. Maintain a flow rate of 11 to 26 liters per minute (3

to 7 gallons per minute). The water pressure switch will open to de-energize the condenser fan relay. The condenser fan motor will stop and will remain stopped until the water pressure switch closes.

The refrigeration unit operating with the water-cooled condenser will perform as outlined in section 4.4 except that the condenser fan motor is stopped in all modes.

To shift to air-cooled condenser operation, do the following:

Disconnect the water supply and the discharge line to the water-cooled condenser. The refrigeration unit will shift to air-cooled condenser operation when the water pressure switch closes. (Refer to section 2.2.)

2.9.2 Water-Cooled Condenser with Condenser Fan Switch (CFS)

For operation of the refrigeration unit w ith the water-cooled condenser w ith (CFS), do the following:

a. Connect the water supply line to the inlet side of

condenserand the dischargeline to the outlet side of the condenser.

b. Maintain a flow rate of 11 to 26 lpm (3 to 7 gpm).

c. Set CFS switch to position ”O” when water is

supplied to the water-cooled condenser. This will de-energize the condenser fan relay. The condenser fan motor will stop and will remain stopped until the CFS switch is set to position ”1.”

The refrigeration unit operating with the water-cooled condenser and the CFS switch in position ”O,” will perform as outlined in section 4.4 except that the condenser fan motor is stopped in all modes.

WARNING

When water flow is below 11 lpm (3 gpm) or when water-cooled operation is not in use, the CFS switch MUST be set to position ”1” or the unit will not operate properly.

To shift to air-cooled condenser operation, do the

following:

Turn the unit OFF and set the C FS switch to position ”1.” Disconnect the water supply and the discharge line to the water-cooled condenser. The unit should now perform as outlined in section 4.4.

2-16T-268-07

Page 36

1. Suction Service Valve

2. Discharge Service Valve

3. Discharge Pressure Regulator Valve

4. Air-Cooled Condenser

5. Evaporator

6. Thermostatic Expansion Valve

7. External Equalizer Line

8. Thermostatic Expansion Valve Bulb

9. Heat Exchanger

10. Rupture Disc

Figure 2-11. Refrigeration Circuit with Water-Cooled Condenser (Optional)

SECTION 2

11. Manual Liquid Line Valve

12. Moisture-Liquid Indicator

13. Condenser Pressure Transducer (CPT)

14. Filter-Drier

15. Sight Glass

16. Water-Cooled Condenser

17. Suction Solenoid Valve

18. Suction Modulation Valve

19. Quench Expansion Valve

2-17 T-268-07

Page 37

2.10 SUCTION SOLENOID VALVE

The suction solenoid valve, shown in Figure 2-5, is controlled by the Controller relay (TS).

a. Operation

If set point is below --10_C(+14_F), or --5_C(+23_F) optionally, and the suction solenoid valve override is not activated, Controller relay (TS) closes to energize the suction solenoid valve (SSV). Once opened, the refrigerant flow rate and unit cooling capacity is increased.

If set point is above --10_C(+14_F), or --5_C(+23_F) optionally, the suction solenoid valve opens during the temperaturepulldown period unless the current limiting suction solenoid overrides or compressor reliability enhancement logic restricts its use. A pulldown period begins when the control temperature is more than 5_C (+9_F) above set point, and ends as soon as the control temperature equals set point.

For both conditions above, at the instant when the SSV opens, the SMV will drop to 20% open, then gradually increase to 100% open. Unless the current limiting suction solenoid overrides or compressor reliability enhancement logic (CREL) restricts its use.

b. Suction Solenoid Override

The suction solenoid override function restricts the opening of the suction solenoid valve (SSV) under certain high ambient and/or box temperatureconditions to prevent compressor overload under these high capacity conditions. If the primary return sensor (RTS) fails (alarm codeAL56), the suction solenoid valve will not open unless the ambient temperature is less than 10_C(50_F). If the ambient sensor fails (AL57), the suction solenoid valve will not be allowed to open until the return air temperature is less than 1.67_C(35_F). If both the ambient and return air (RTS) sensors fail, the suction solenoid valve will not be allowed to open until at least one of the sensors is repaired.

2.11 REMOTE MONITORING (Optional)

NOTE

The in-range light will be illuminated if the container control air temperature is within the tolerance selected. Refer to section 3.1.4 (Code 30).

When the remote monitor plug is connected to the remote monitoring receptacle, the following remote circuits are energized:

CIRCUIT FUNCTION

Sockets B to A Energizes remote cool light Sockets C to A Energizes remote defrost light Sockets D to A Energizes remote in-range light

2-18T-268-07

Page 38

2.12 SAFETY AND PROTECTIVE DEVICES

IP-CP or HP S will shut down the compressor.

Unit components are protected from damage by safety and protective devices listed in Table 2-1.These devices monitor the unit operating conditions and open a set of electrical contacts when an unsafe condition occurs.

Open safety switch contacts on either or both of devices

Table 2-1. Safety and Protective Devices

UNSAFE CONDITION SAFETY DEVICE DEVICE SETTING

Circuit Breaker (CB-1) -- Manual Reset Trips at 29 amps (460 vac)

Excessive current draw

Excessive current draw on the control circuit

Excessive current draw by the Controller/DataCORDER

Excessive condenser fan motor winding temperature

Circuit Breaker (CB-2, 50 amp) --Manual Reset

Circuit Breaker (CB-2, 70 amp) --Manual Reset

Fuse (F3) 15 amp rating

Fuse (F1 & F2) 5 amp rating

Internal Protector (IP-CM) -- Automatic Reset

Open safety switch contacts on device IP-CM will shut down the condenser fan motor.

The entire refrigeration unit will shut down if one of the following safety devices open: (a) Circuit Breaker(s); (b) Fuse (F3/15A); or (c) Evaporator Fan Motor Internal Protector(s) -- (IP-EM).

Trips at 62.5 amps (230 vac)

Trips at 87.5 amps (230 vac)

N/A

Excessive compressor motor winding temperature

Excessive evaporator fan motor(s) winding temperature

Abnormal pressures/temperatures in the high refrigerant side

Abnormally high discharge pressure

Internal Protector (IP-CP) -- Automatic Reset

Internal Protector(s) (IP-EM) -- Automatic Reset

FusiblePlug--UsedontheReceiver

Rupture Disc -- Used on the Water-Cooled Condenser

High Pressure Switch (HPS) Opens at 25 kg/cm@ (350 psig)

35 kg/cm@ = (500 psig)

N/A

93 _C = (200 _F)

SECTION 2

2-19 T-268-07

Page 39

MICROPROCESSOR

3.1 MICRO-LINK 2i CONTROLLER MODULE

SECTION 3

122

1. Micro-Link 2i Controller/DataCORDER Module

2. Connectors

3. Test Points

4. Fuses

Figure 3-1. Micro-Link 2i Controller/DataCORDER Module

342 225

5. Control Circuit Power Connection (Location: In back of connector)

6. Battery Pack (Optional)

7. Software Programming Port

8. Mounting Screw

3.1.1 Brief Description

NOTE

Some units are equipped with an optional emergency bypass switch (EB), which permits manually overriding a malfunctioning Controller by locking the unit into a continuous full cooling mode (see Figure 2-7).

WARNING

Do not attempt to service the Controller/DataCORDER module. Breaking the warranty seal will void the warranty.

CAUTION

Remove the Controller/DataCORDER module and unplug all wire h arness connectors before performing any arc welding on any part of the container.

Do not remove wire harnesses from module unless you are grounded to the unit frame with a static safe wrist strap.

The Carrier Transicold Micro-Link 2i Controller/DataCORDER is a custom-designed microprocessor-based module which incorporates embedded software to:

a. Control supply or return air temperature to

extremely tight limits by providing modulated refrigeration control, electric heat control and defrost to ensure continuous conditioned air delivery to the load.

b. Provide dual independent readouts of set point and

supply or return air temperatures.

c. Provide digital readout and ability to select data.

Refer to Table 3-3 for Controller Function Codes. For Controller alarm digital display identification refer to Table 3-4.

d. Provide a pre-trip step-by-step checkout of

refrigeration unit performance including: proper component operation, electronic and refrigeration control operation, heater operation, probe calibration and current limiting. Refer to section

3.2.

e. Provide the ability to select or change Codes 27 to

37 and set point without AC power being hooked up.Refertosection3.1.4.

SECTION 3

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f. Provide reprogrammability and configuration

through a memory card. The memory card automatically downloads new software to the Controller when inserted, and controls output to the display for status information.

g. Provide electronic data storage.

NOTE

For the benefit of the reader the remaining parts of section 3.1 will devote themselves to the temperature controller portion of the module. For the integrated DataCORDER refer to section 3.3.

3.1.2 Controller Programming (Memory) Cards

The programming cards are used for loading software into the Controller. This is the same concept as using a floppy diskette to load software into a personal computer.

The software that can be loaded into the Controller module comes in one of two forms: “Operational Software” or “Configuration Software.”

Procedure for loading software:

Refer to section 6.27.1.

Operational Software:

This software operates the Controller module, which turns fans on and off, turns the compressor on and off, etc.

Configuration Software:

This software tells the Operational Software what physical components are built into the container unit. Refer to Table 3-1.

Programming cardswith either OperationalSoftware or Configuration Software are available t hrough CTD Replacement Components Group.

The use of a configuration program card in the field should only occur under unusual circumstances. Some of these circumstances may include:

a. A Controller module that has an older version of

Operational Software, when the need exists to upgrade to a newer version of the software.

b. A physical component in the container unit is

changed to a different component, resulting in a new configuration for the unit.

c. A Controller module was damaged in such a way

that the integrity or existence of software within the module is questionable.

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Table 3-1. Controller Configuration Variables

CONFIGURATION

NUMBER

1 Bypass Valve Enable In Out 2 Evaporator Fan Speed dS (Dual) SS (Single) 3 Number of Sensor Probes FoUR dUAL 4 Dehumidification Mode On Off 5 Probe Calibration noCal CAL 6 Condenser Fan Speed Select Off (Single) On (Variable) 7 Unit Selection, 20FT/ 40FT/45FT 40ft 20ft,45 8 Single Phase/Three Phase Motor 1Ph 3Ph 9 Refrigerant Selection r134a r12, r22, bLEnd

10 Compressor Speed Out (Single) In (Dual)

11 Defrost “Off” Selection noOFF OFF 12 TXV/Solenoid Quench Valve Out (TXV) In (Solenoid) 13 Unloader Out In 14 Condenser Pressure Control (CPC) In Out 15 Discharge Temperature Sensor Out In 16 DataCORDER Option On (Yes) Off (No) 17 Discharge Pressure Sensor Out (No) In (Yes) 18 Heater Old (Low Watt) nEW (High Watt) 19 Controlled Atmosphere Out (No) In (Yes) 20 Pressure Sensor (Suction) Out (No) In (Yes) 21 Auto-Transformer Std -22 Economy Mode Option Off Std, Full 23 Defrost Interval Timer Save Option noSAV SAV 24 Advanced Pre-Trip Enhanced Test Off On 25 Pre-Trip Test Points/Results Recording rSLts data 26 Heat Lockout Set to --10_C Set to--5_C 27 Suction Temperature Display Out In 28 Bulb Mode Nor bulb 29 Arctic Mode Out In 30 Compressor Size 41 CFM 37 CFM 31 Probe Check Logic Std SPEC 32 Single Evaporator Fan Option 2EF0 1EF0 33 Snap Freeze Option Off SnAP 34 Degree Celsius Lockout Option bOth _F 35 Humidification Mode Off On 36 Modulation Valve Type 1 2, 3 37 Electronic Partlow rEtur SuPPL, bOth 38 Quench Bypass Valve Out In 39 Current Limit Range Out In 40 Demand Defrost Out In

TITLE DEFAULT OPTION

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3.1.3 General Layout of the Controller Section

The Micro-Link 2i Controller/DataCORDER consists of a key pad, display module and C ontroller module. Connectors are used to attach the wiring of the unit t o the Controller module. The Controller module is designed to permit ease of installation and removal.

All control functions are accessed by key pad selections and viewed on the display module which are designed for optimum user friendliness and convenience.

The key pad (see Figure 3-1) is mounted on the right-hand side of the control box. The key pad consists of eleven push-energized membrane switches that act as the user’s interface with the Controller and the optional DataCORDER. Refer to Table 3-2.

CODE

SELECT

ALARM

LIST

ENTER

RETURN

SUPPLY

BATTERY

POWER

Figure 3-1. Key Pad

PRE

TRIP

DEFROST INTERVAL

ALT.

MODE

Table 3-2. Key Pad Function

KEY FUNCTION

Change set point upward. Change codes upward. Scan alarm list upward. Change user selectable features

Arrow Up

Arrow Down

Return/Sup

ply

_C/_F

Alarm List

Code Select

Defrost Interval

Pre–Trip

Battery

Power

Enter

ALT. Mode

upward. Pre-trip advance forward. Pre-trip test interruption. DataCORDER Function and Alarm Codes are scrolled upward after the ALT. MODE key is depressed.

Change set point downward. Change codes downward. Scan alarm list downward. Change user selectable features downward. Pre-trip repeat backward. DataCORDER Function and Alarm Codes are scrolled downward after the ALT. MODE key is depressed.

Displays non-controlling probe temperature (momentary display).

Displays alternate temperature scale (momentary display).

Displays alarm list and clearing of the alarm queue (when followed by Enter key) for the Controller, and also for the DataCORDER after the ALT. MODE key is depressed.

Access function codes (see arrow up and arrow down) for the Controller, and also for the DataCORDER after the ALT. MODE key is depressed.

Displays selected defrost interval.

Displays a pre-trip selection menu. Discontinues pre-trip in progress.

If the unit is equipped with the optional battery pack, initiate the battery backup mode to allow set point and function code selection if no mains power is present.

Entering a set point change. Extending to 30 seconds the time a chosen data function code is displayed. Entering the value of a user selectable mode. Clearing the alarm list and initiating pre-trip. Also used for various DataCORDER functions after the ALT. MODE key is depressed.

Allows access to DataCORDER function codes, alarm codes, DataCORDER configuration and scrollback.

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The display module (see F igure 3-2) is mounted at a 20 degree downward tilt to aid in visibility. The display module consists of:

a. Two 25mm (1 inch) high, five digit LC D displays

which are easily viewed in direct sunlight and backlighted for superior low-light visibility.

b. Seven Indicators:

S Cool -- White Lamp: Energized when the

refrigerant compressor is energized.

S Heat -- Orange LED: Energized when the

heaters are on, and the unit is in the heat or defrost mode.

S Defrost -- Orange LED: Energized when the

heaters are on, and the unit is in the defrost mode.

S In-Range -- Green LED: Energized when the

controlling temperature probe is in range. (Supply air probe will be used for control in the perishable ranges and the return a ir probe is used for control in the frozen ranges.)

S Alarm -- Red LED: Energized when there is

an active or an inactive shutdown alarm (AL20 to AL27) in the alarm queue.

S Supply -- Yellow LED: Energized when

supply temperature and set point are displayed. Flashes if dehumidification or humidification i s enabled on units so equipped.

S Return -- Yellow LED: Energized when return

temperature and set point are displayed.

COOL HEAT DEFROST IN RANGE ALARM SUPPLY RETURN

SETPOINT/Code AIR TEMPERATURE/Data

Figure 3-2. Display Module

NOTE

The default display m ode will show the set point temperature (on the left display) and controlling probe temperature (on the right display). The controlling probe in the perishable range will be the SUP PLY air probe and the controlling probe in the frozen range will be the RETURN air probe.

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Page 44

3.1.4 Controller Function Codes

There are thirty-nine functions which the operator may access to examine the operating status of the unit. To access these functions, perform the following steps: Press the CODE SELECT key, then press an arrow key until the left window displays the desired code number

Table 3-3. Controller Function Code Assignments

(see Table 3-3). For t he display only function codes, the right window will display t he value of this item for five seconds before returning to the normal display mode. If a longer time is desired, pressing the ENTER key will extend the time to 30 seconds after the last pressing of the ENTER key. Function codes are explained in Table 3-3.

CODE

Cd01

Cd02

Cd03

Cd04 Cd05 Cd06

Cd07 Main Power Voltage The main supply voltage is displayed.

Cd08

Cd09

Cd10

Cd11

Cd12

Modulation Valve Opening (%)

Quench Valve (Open--Closed)

Suction Solenoid Val v e (Open--Closed)

Line Current, Phase A Line Current, Phase B Line Current, Phase C

Mains Power Frequency

Ambient Temperature

Compressor Suction Temperature (Optional)

Compressor Discharge Temperature (Optional)

Compressor Suction Pressure (Optional)

TITLE DESCRIPTION

Inapplicable Functions Display -- ------ --

Display Only Functions

The suction modulation valve (SMV) is a normally open valve which restricts flow of refrigerant to the compressor when energized by a pulse width modulated (PWM) output. The amount of valve closure is proportional to the applied current over the range of 0.2 to 1.3 A. The valve is completely open (right display reads 100%) below 0.2 amps and is completely closed (right display reads 0%) at 1.3 amps.

Shows state of the solenoid quench valve, if so equipped (open or closed).

The suction solenoid valve (SSV) provides maximum refrigerant flow to the refrigeration unit. This valve will always be open for set points at or below --10_C (+14_F), or --5_C(+23_F) optionally, and during temperature pulldown periods unless suction solenoid override or current limiting restricts its use.

Unit current is monitored by two current sensors. The current measured is used for control and diagnostic purposes.For control processing, the highest of the Phase A and B current values is used for current limiting purposes. The third unmeasured leg is calculated based on a current algorithm. For diagnostic processing, the current draws are used to determine control unit operations. Whenever a heater or a motor is turned ON or OFF, the current draw increase/reduction for that activity is measured. The current draw is then tested to determine if it falls within the expected range of values for the unit. Failure of this test will result in a pre-trip failure or a control alarm indication.

The value of the main power frequency is displayed in Hertz. The frequency displayed will be halved if either fuse F1 or F2 is bad and alarm code AL21 is active.

The ambient sensor (AMBS) measures the temperature outside the container. For location of the sensor, see Figure 2-5.

Compressor suction temperature is measured just prior to the compressor suction service valve, and is a display-only temperature.

The compressor discharge temperature is measured near the compressor discharge valve and is display only.

Compressor suction pressure is displayed using a pressure transducer. Pressure is displayed in units of psig when code 28 is set to _F and units of bars when code 28 is set to _C. “P” appears after the value to indicate psig, “b” appears after the value to indicate bars and “i” appears after the value for inches of mercury.

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CODE

Inapplicable Functions Display -- ------ --

Condenser pressure is displayed using a pressure transducer. Pressure is

Cd13

Cd14

Cd15

Cd16

Cd17

Cd18 Software Revision # The software revision number is displayed.

Cd19 Battery Check

Cd20 Config/Model #

Cd21 Future Expansion This code is for future expansion, and is not in use at this time.

Cd22

Cd23

Cd24

Cd25

Cd26

Condenser Pressure (CPC)

Compressor Discharge Pressure (Optional)

Unloader Valve (On--Off)

Compressor Motor Hour Meter

Relative Humidity (%) (Optional)

Compressor Speed (High--Low--Off)

Evaporator Fan Speed (High--Low--Off)

Controlled Atmosphere State (On--Off) (Optional)

Compressor Run Time Remaining Until Defrost

Defrost Termination Sensor Temperature

displayed in units of psig when code 28 is set to _F and units of bars when function code Cd28 is set to _C. “P” is displayed after the value to indicate psig, “b” appears after the value to indicate bars and “i” appears after the value for inches of mercury.

Compressor discharge pressure is displayed using a pressure transducer. Pressure is displayed in units of psig when function code Cd28 is set to _F and units of bars when Cd28 is set to _C. “P” is displayed after the value to indicate psig, “b” appears after the value to indicate bars and “i” appears after the value for inches of mercury.

The status of the unloader valve (if present) is displayed (on or off).

Records total hours of compressor run time. Total hours are recorded in increments of 10 hours (i.e., 3000 hours displayed as 300).

This code is only applicable to units with a humidity sensor (HS). This code displays, as a percent value, the relative humidity at that time.

This code checks the Controller/DataCORDER battery pack. While the test is running, “btest” will flash on the right display, followed by the result. “PASS” will be displayed for battery voltages greater than 7.0 volts and for alkaline batteries with voltages greater than 7.5 volts, “FAIL” will be displayed for battery voltages between 4.5 and 7.0 volts, and “-- -- --” will be displayed for battery voltages less than 4.5 volts. After the result is displayed for four seconds, “btest” will again be displayed, and the user may continue to scroll through the various codes.

This code indicates the dash number of the model for which the Controller is configured (i.e., if the unit is a 69NT40-511-105, the display will show 11105).

The status of the compressor is displayed (high, low or off).

Displays the current evaporator fan state (high, low or off).

This code shows the state of Controlled Atmosphere (enabled or disabled), if equipped.

This code displays the time remaining until the unit goes into defrost (in tenths of an hour). This value is based on the actual accumulated compressor running time.

The defrost termination sensor (DTS) is located immediately above the evaporator coil. It is used by the Controller for defrost initiation and termination. (See Figure 2-2.)

DESCRIPTIONTITLE

SECTION 3

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CODE

Inapplicable Functions Display -- ------ --

Display Only Functions

DESCRIPTIONTITLE

NOTE

Function codes Cd27 through Cd37 are user-selectable functions. The operator can change the value of these functions to meet the operational needs of the container.

The defrost interval is the time interval between defrost cycles. Five selectable values are available: 3, 6, 9, 12 or 24 hours. The factory default value is 12 hours. The time interval of the first defrost will not begin counting down until defrost termination sensor (DTS) is below 10_C(50_F). The time interval to the next defrost cycle is entered into the Controller at the time DTS is below 10_C(50_F) or at power-up. (See code Cd37 for deviations.) If DTS reaches 25.6_C(78_F) at any time during the timer count down, the interval is reset and the countdown begins over. If DTS has failed (i.e., alarm code AL60 is active) and the primary return sensor temperature is less than 10_C, the interval timer countdown begins. The interval timer is reset if the return sensor temperature rises above 25.6_C. (See section 4.4.6.) Defrost Interval Timer Value Option: If the software is configured to “ON” for this option, then the value of the defrost interval timer will be saved at power down and restored at power up. This option prevents short power interruptions from resetting an almost expired defrost interval, and possibly delaying a needed defrost cycle.

Cd27

Defrost Interval (Hours)

NOTE

Cd28

Cd29

Cd30 In-Range Tolerance

Cd31

Temperature Units (_Cor_F)

Failure Action (Mode)

Stagger Start Offset Time (Seconds)

The defrost interval timer counts only during compressor run time.

This code determines the temperature units (_Cor_F) which will be used for all temperature displays. The user selects _Cor_F by selecting function code Cd28 and pushing the ENTER key. The factory default value is Celsius units.

NOTE

This function code will display “ --- --- --- --- --- “ i f the Controller configuration variable option 34 is set to _F (refer to Table 3-1).

If all of the control sensors are out of range (alarm code AL26) or there is an alarm code AL27 failure, the unit will enter the shutdown state defined by the failure action. The user selects one of four possible actions as designated by a selection code:

A -- Full Cooling (SMV 100%) B -- Partial Cooling (SMV 50% open) C -- Evaporator Fan Only D -- Full System Shutdown -- Factory Default

The in-range tolerance will determine the band of temperatures around the set point which will be designated as in-range. If the control temperature is in-range, the in-range light will be illuminated. There are four possible values:

1. ¦ 0.5_C(¦ 0.9_F)

2. ¦ 1.0_C(¦ 1.8_F)

3. ¦ 1.5_C(¦ 2.7_F)

4. ¦ 2.0_C(¦ 3.6_F) -- Factory Default

The stagger start offset time is the amount of time that the unit will delay at start-up, thus allowing multiple units to stagger their control initiation when all units are powered up together. The eight possible offset values are:

0 (Factory Default), 3, 6, 9, 12, 15, 18 or 21 seconds

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CODE

Cd32

Cd33

Cd34

Cd35

Cd36

Cd37

Current Limit (Amperes)

Dehumidification Control (% RH) (Optional)

Economy Mode (On--Off) (Optional)

Bulb Mode (Normal--Bulb) (Optional)

Evaporator Speed Select (Cd35 must be in “Bulb”)

Defrost Temperature Sensor Setting (Optional)

DESCRIPTIONTITLE

Inapplicable Functions Display -- ------ --

The current limit is the maximum current demand allowed on any phase at any time. Limiting the unit’s current (amperage) reduces the load on the main power and lowers the compressor discharge pressure. When desirable, the limit can be lowered. Note, however, that capacity is also reduced. The five values for 460vac operation are:

15, 17, 19, 21 (Factory Default), 23

This code is only applicable to units with a humidity sensor (HS).Relative humidity set point is available only on units configured for dehumidification. When the mode is activated, the control probe LED flashes on and off every second to alert the user. If not configured, the mode is permanently deactivated and Cd33 will display “-- --------.” When set point is available, it can be set to “OFF.” “TEST,” or 65 to 95% relative humidity in increments of 1%. If bulb mode is active (code Cd35) and “Lo” speed evaporator motors are selected (code Cd36) then set point ranges from 60 to 95%. When “TEST” is selected or test set point is entered, the heaters should be turned on, indicating that dehumidification mode is activated. After a period of five minutes has elapsed in this mode, the previously selected mode is reinstated.

Economy mode is a user selectable mode of operation provided for power saving purposes. Refer to sections 3.1.7.1 and 3.1.7.2 for a more detailed description of economy mode.

Bulb mode is a user selectable mode of operation that is an extension of normal dehumidification. If dehumidification is set to “Off,” code Cd35 will display “Nor” and the user will be unable to change it. After a dehumidification set point has been selected and entered for code Cd33, the user may then change code Cd35 to “bulb.” After bulb has been selected and entered, the user may then utilize function codes Cd36 and Cd37 to make the desired changes.

This code is enabled only if a dehumidification set point has been selected using function code Cd33 and “bulb” has been selected using function code Cd35. If these conditions are not met, “alt” will be displayed indicating that the evaporator fans will alternate their speed whenever a dehumidification set point is selected. This display cannot be changed by the user. If a dehumidification set point has been selected along with bulb mode then “alt” may be selected for alternating speed, “Lo” for low speed evaporator fan only, or “Hi” for high speed evaporator fan only. If a setting other than “alt” has been selected and bulb mode is deactivated in any manner, then selection reverts back to “alt.”

This code, as with function code Cd36, is used in conjunction with bulb mode and dehumidification. If bulb mode is active, this code allows the user to change the temperature above which the defrost termination sensor (DTS) temperature must go to terminate defrost. It allows the user to change the setting from 4_Cto

25.6_Cin0.1_C(0.2_F) increments. This value is changed using the UP/DOWN ARROW keys, followed by the ENTER key when the desired value is displayed. If bulb mode is deactivated in any manner, the DTS setting above which defrost terminates defaults to the normal 25.6_C(78_F) setting.

NOTE

SECTION 3

In the unlikely event that AL55 activates, Function Codes Cd38 and Cd39 will display SRS and R RS, respectively.

This code is only applicable to units without a DataCORDER that are configured to have four probes. If this is true, it will then display the current secondary supply air temperature.If the unit is configured with a DataCORDER, the Controller function code Cd38 will display “-- --------.” and the display values for SRS will appear on the DataCORDER function code dC1.

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Cd38

Secondary Supply Air Temperature (Optional)

Page 48

CODE

Cd39

Secondary Return Air Temperature (Optional)

DESCRIPTIONTITLE

Inapplicable Functions Display -- ------ --

This code is only applicable to units without a DataCORDER, that are configured to have four probes. If this is true, it will then display the current secondary return air temperature.If the unit is configured with a DataCORDER, the Controller function code Cd39 will display “-- --------,” and the display values for RRS will appear on the DataCORDER function code dC2.

3.1.5 Controller Alarms

The alarm philosophy balances the protection of the refrigeration unit and that of the refrigerated cargo. The action taken when an error is detected always considers the survival of the cargo. Rechecks are made to confirm that an error actually exists.

Some alarms requiringcompressor shutdown have time delays before and after to try to keep the compressor on line. An example is a low mains voltage, when the voltage drops over 25%, an indication is given on the display, but the unit will continue to run.

An alarm (See Table 3-4) is indicated by flashing an alarm codeon the display panel, and forsome alarms, by the alarm light illuminating.

When an Alarm Occurs:

S The red alarm light will illuminate for “20

series” alarms only.

S If a detectable problem is found to exist, its

alarm code will be alternately displayed with the set point on the left display.

S The user should scroll through the alarm list

to determine what alarms exist or have existed. Alarms must be diagnosed and corrected before the Alarm List can be cleared.

To Display Alarm Codes:

While in Set Point Selection or Default Display mode, press the ALARM LIST key. This accesses the Alarm List Display Mode, which displays any alarms archived in the Alarm Queue. The alarm list stores up to 16 alarms in the sequence in which they occurred. The user may scroll through the list by depressing the UP ARROW key. Depressing the DOWN ARROW key allows the user to scroll backward through the list.

The left display will show “AL#,” where # is the alarm number sequentially in the queue.

The right display will show:

S “AAXX” for an active alarm, where “XX” is

the alarm code. See Table 3-4, Controller Alarm Indications.

S “IAXX” for an inactive alarm.

“END” is displayed to indicate the end of the alarm list if any alarms are active. “CLEAr” is displayed if all alarms are inactive.

S The alarm queue may only be cleared if no

alarms are active, other than alarm code AL51, and “CLEAr” is displayed.

To Clear the Alarm List:

If all above conditions have been satisfied, e.g. no alarms are active other than AL51, the alarm queue may be cleared.

S Press the ENTER key. The alarm list will

c l e a r a n d “ -- -- -- -- -- ” w i l l b e d i s p l a y e d .

NOTE

If the unit is configured for single evaporator fan operation (refer to Table 3-1), and troubleshooting alarms AL11 and AL12, be aware that the presence of 24 vac on the evaporator fan motor internal protector safety sense lines (MC6 and KB10) will indicate a failure condition. This differs from most other circumstances, whereby the absence of 24 vac usually means an alarm condition is present.

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Table 3-4. Controller Alarm Indications

CODE

AL11

AL12

AL20

AL21

AL22

AL23

AL24

AL25

AL26

AL27

AL51 Alarm List Failure

AL52 Alarm List Full

Evaporator Fan Motor 1 Safety

Evaporator Fan Motor 2 Safety

Control Circuit Fuse Open (24 vac)

Micro Circuit Fuse Open (18 vac)

Evaporator Fan Motor Safety

KA2--KB10 Jumper Disconnected

Compressor Motor Safety

Condenser Fan Motor Safety

All Supply and Return Air Control Sensors Failure

Probe Circuit Calibration Failure

TITLE DESCRIPTION

MODEL 69NT40-51 1-72

Alarm 11 is triggered by the opening of the internal protector for evaporator fan motor #1. This alarm will disable the probe check portion of defrost and the probe diagnostic logic.

Alarm 12 is triggered by the opening of the internal protector for evaporator fan motor #2. This alarm will disable the probe check portion of defrost and the probe diagnostic logic.

ALL MODELS

Alarm 20 is triggered by fuse (F3) opening and will cause the software shutdown of all control units. This alarm will remain active until the 15 amp fuse is replaced.

Alarm 21 is triggered by one of the fuses (F1/F2) being opened on 18 volts AC power supply to the Controller. The suction modulation valve (SMV) will be opened and current limiting is halted. The compressor will cycle. Temperature control will be maintained by cycling the compressor.

Alarm 22 is triggered by the opening of the evaporator motor internal protector. This alarm will disable all control units until the motor protector resets. Also, refer to code Cd29.If the unit is configured for single evaporator fan operation, alarm AL22 will also activate if alarms AL11 and AL12 are active simultaneously.

Alarm 23 is triggered by a missing jumper wire. The alarm will stay active until the jumper wire is reconnected.

Alarm 24 is triggered by the opening of the compressor motor internal protector. This alarm will disable all control units except for the evaporator fans and will remain active until the motor protector resets. Also, refer to code Cd29.

Alarm 25 is triggered by the opening of the condenser motor internal protector and will disable all control units except for the evaporator fans. This alarm will remain active until the motor protector resets. This alarm is deactivated if the unit is operating on water cooled condensing.

Alarm 26 is triggered if the Controller determines that all of the control sensors are out-of-range. This can occur for box temperatures outside the range of --50_C to +70_C(--58_F to +158_F). This alarm triggers the failure action code set by Function Code Cd29.

The Controller has a built-in Analog to Digital (A-D) converter, used to convert analog readings (i.e. temperature sensors, current sensors, etc.) to digital readings. The Controller continuously performs calibration tests on the A-D converter. If the A-D converter fails to calibrate for 30 consecutive seconds, this alarm is activated.This alarm will be inactivated as soon as the A-D converter calibrates.

During start-up diagnostics, the EEPROM is examined to determine validity of its contents. This is done by testing the set point and the alarm list. If the contents are invalid, Alarm 51 is activated.During control processing, any operation involving alarm list activity that results in an error will cause Alarm 51 to be activated.Alarm 51 is a “display only” alarm and is not written into the alarm list. Pressing the ENTER key when “CLEAr” is displayed will result in an attempt to clear the alarm list. If that action is successful (all alarms are inactive), Alarm 51 will be reset.

Alarm 52 is activated whenever the alarm list is determined to be full; at start-up or after recording an alarm in the list. Alarm 52 is displayed, but is not recorded in the alarm list. This alarm can be reset by clearing the alarm list. This can be done only if all alarms written in the list are inactive.

SECTION 3

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CODE

AL53

AL54

AL55

AL56

NiCad Battery Pack Failure

Primary Supply Air Sensor Failure (STS)

DataCORDER Failure

Primary Return Air Sensor Failure (RTS)

DESCRIPTIONTITLE

Alarm 53 is caused by the nicad battery pack being too low of a charge for battery-backed recording.

NOTE

Check for recharging or replacing battery pack.

Alarm 54 is activated by an invalid primary supply sensor reading that is sensed outside the range of --50 to +70_C(--58_F to +158_F) or if the probe check logic has determined there is a fault with this sensor. If Alarm 54 is activated and the primary supply is the control sensor, the secondary supply sensor will be used for control if the unit is so equipped. If the unit does not have a secondary supply probe, and AL54 is activated, the (primary return sensor, minus 2_C) will be used for control.

NOTE

The P5 Pre-Trip test must be run to inactivate the alarm (refer to section 3.2.1).

This alarm has been activated to indicate the DataCORDER has been disabled due to internal failure. To clear this alarm, simply reconfigure the unit to its OEM model number by using the multi-configuration card.

Alarm 56 is activated by an invalid primary return sensor reading that is outside the range of --50 to +70_C(--58_F to +158_F). If Alarm 56 is activated and the primary return is the control sensor, the secondary return sensor will be used for control if the unit is so equipped. If the unit is not equipped with a secondary return sensor or it fails, the primary supply sensor will be used for control.

NOTE

Ambient

AL57

AL58

AL59

AL60

AL61 Heaters Failure

AL62

Temperature Sensor Failure (AMBS)

Compressor High Pressure Safety (HPS)

Heat Termination Thermostat (HTT) Safety

Defrost Termination Sensor Failure (DTS)

Compressor Circuit Failure

The P5 Pre-Trip test must be run to inactivate the alarm (refer to section 3.2.1).

Alarm 57 is triggered by an ambient temperature reading outside the valid range from --50_C(--58_F) to +70_C (+158_F).

Alarm 58 is triggered when the compressor high discharge pressure safety switch (HPS) remains open for at least one minute. This alarm will remain active until the pressure switch resets, at which time the compressor will restart.

Alarm 59 is triggered by the opening of the heat termination thermostat (HTT) and will result in the disabling of the heater. This alarm will remain active until the thermostat resets.

Alarm 60 is an indication of a probable failure of the defrost termination sensor (DTS). It is triggered by the opening of the heat termination thermostat (HTT) or the failure of the DTS to go above 25.6_C(78_F) within two hours of defrost initiation. After one-half hour with a frozen range set point, or one-half hour of continuous compressor run time, if the return air falls below 7_C(45_F), the Controller checks to ensure defrost termination sensor (DTS) has dropped to 10_C or below. If not, a DTS failure alarm is given and the defrost mode is operated off of return temperature sensor (RTS). The defrost mode will be terminated after one hour by the Controller.

Alarm 61 is the heater alarm caused by detection of improper amperage resulting from heater activation (deactivation). Each phase of the power source is checked for proper amperage.This alarm is a display alarm with no resulting failure action, and will be reset by a proper amp draw of the heater.

Alarm 62 is triggered by improper current draw increase (or decrease) resulting from compressor turn on (or off). The compressor is expected to draw a minimum of 2 amps; failure to do so will activate the alarm.This is a display alarm with no associated failure action and will be reset by a proper amp draw of the compressor.

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CODE

ERR

AL63 Current Over Limit

Discharge

AL64

Temperature Over Limit (CPDT)

Discharge Pressure

AL65

Transducer Failure (DPT)

Suction Pressure

AL66

Transducer Failure (SPT)

AL67

Humidity Sensor Failure

Condenser Pressure

AL68

Transducer Failure (CPT)

Suction Temperature

AL69

Sensor Failure (CPSS)

DESCRIPTIONTITLE

Alarm 63 is triggered by the current limiting system. If the compressor is ON and current limiting procedures cannot maintain a current level below the user selected limit, the current limit alarm is activated.This alarm is a display alarm and is inactivated by power cycling the unit, changing the current limit via the code select Cd32, or if the suction modulation valve (SMV) is allowed to open to 100% and the suction solenoid valve is allowed to open.

Alarm 64 is triggered if the discharge temperature is sensed greater than 135_C (275_F) for three continuous minutes, if it exceeds 149_C (300_F),orifthe sensor is out of range. This is a display alarm and has no associated failure action.

Alarm 65 is triggered by a compressor discharge transducer reading outside the valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm

(460 psig). This is a

display alarm and has no associated failure action. Alarm 66 is triggered by a suction pressure transducer reading outside the valid

range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm

(460 psig). This is a display

alarm and has no associated failure action. Alarm 67 is triggered by a humidity sensor reading outside the valid range of 0%

to 100% relative humidity. If alarm AL67 is active and the dehumidification mode was previously activated, then the dehumidification mode will be deactivated.

Alarm 68 is triggered by a condenser pressure transducer reading outside the valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm

(460 psig). This is a

display alarm and has no associated failure action. Alarm 69 is triggered by a suction temperature sensor reading outside the valid

range of --60_C(--76_F) to 150_C (302_ F). This is a display alarm and has no associated failure action.

NOTE

If the Controller is configured for four probes without a DataCORDER, the DataCORDER alarms AL70 and AL71 (See Table 3-7) will be processed as Controller alarms AL70 and AL71.

The Controller performs self-check routines. if an internal failure occurs, an ERR #0--5 will appear on the display. This is an indication the Controller needs to be replaced.

ERROR DESCRIPTION

Indicates that the Controller working memory has failed.

Indicates a problem with the Controller program.

The Controller program has entered a mode whereby the Controller program has stopped executing.

The on board timers are no longer operational. Timed items such as; defrost, etc. may not work.

Internal multi-purpose counters have failed. These counters are used for timers and other items.

The Controller’s Analog to Digital (A-D) converter has failed.

ERR

Entr

StPt

Internal

croprocessor

Failure

Enter Setpoint (Press Arrow & Enter)

Low Mains Voltage (Function Codes Cd27--38 disabled and NO alarm stored.)

#0 -- RAM failure

#1 -- Program Memory failure

#2 -- Watchdog time-- out

#3 -- On board timer failure

#4 -- Internal counter failure

#5 -- A-D failure

The Controller is prompting the operator to enter a set point.

This message will be alternately displayed with the set point whenever the mains voltage is less than 75% of its proper voltage.

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3.1.6 Condenser Pressure Control (CPC)

In order for the CPC logic to be enabled, the following conditions must be met:

S C PC configuration variable set to “In”

S CPT sensor is valid (alarm code AL68

inactive)

S AMB S sensor is valid

(alarm code AL57 inactive)

S AMB S is less than or equal to 26.6_C

(79.9_F)

S Voltage/Frequency ratio is less than or equal

to 8.38

When condenser pressure control (CPC) is enabled (all of the above conditions are met), either pressures or timers may dictatea change of state from OFF to ON, or ON to OFF. If the condenser fan is OFF, it will be energized if saturation condensing pressure is greater than 200 psig OR if the condenser fan has been OFF for a maximum of sixty seconds depending on the ambient temperature. If the condenser fan is ON, it will de-energize only if thesaturation condensing pressure is less than 130 psig and the condenser fan has been running for a minimum of thirty seconds depending on the ambient temperature. As the ambient temperature increases, the amount of time that the condenser fan is energized will correspondingly increase.

If any one of the following conditions occur the CPC logic will be disabled:

S C PT sensor is invalid

(alarm code AL68 activates)

S AMB S sensor is invalid

(alarm code AL57 activates)

S AMBS is greater than 29.5_C (85.1_F)

S Voltage/Frequency ratio is greater than 8.42

3.1.7 Controller Temperature Control

There are two control ranges, Frozen and Perishable (chill). The Frozen range is active with set points at or below --10_C(+14_F), or --5_C(+23_F) optionally, and the Perishable range is active at set points above

-- 1 0 _C(+14_F), or -- 5_C(+23_F) optionally. See Figure 3-4 and Figure 3-5.

The Controller configuration variable for “Heat Lockout” (refer to Table 3-1) can be changed for set points of either --10_C(+14_ F), or -- 5_C(+23_F) optionally.

NOTES

S When upward set point changes are made at

ambients below 27_C(80_F), the compressor is immediately cycled OFF. The compressor three minute time delay will be overridden, so that as soon as the control temperature is at least 0.2_C (0.4_F) above set point the compressor will turn ON.

S When the compressor starts for the first time

after power is applied manually, the SMV will open to 100% and the unit will run for three minutes to boil off dissolved refrigerant from the compressor oil.

3.1.7.1 Perishable (Chill) Range Above -- 10_C (+14_F), or --5_C(+23_F) Optionally.

For set points above -- 1 0 _C(+14_F), or --5_C(+23_F) optionally, the Controller maintains SUPPLY air at the set temperature by the following modes of operation:

a. Operation in the conventional mode without

dehumidification (Code 33 OFF)

1. At ambients below 27_C(80_F), the condenser fan

will cycle on/off depending on condenser pressure and on/off times.

If the condenser pressure is greaterthan 200 psig OR the condenser fan has been OFF at least 60 seconds, the condenser fan will start.

If the condenser pressure is less than 130 psig AND the condenser fan remains ON for at least 30 seconds, the condenser fan will stop.

2. At ambients above 27_C(80_F), condenser

pressure control (CPC) is disabled and the condenser fan runs continuously.

If the unit starts when ambient is below --10_C (+14_F) and condenser pressure is below 200 psig, the condenser fan will not start until pressure reaches 200 psig.

The supply probe is used for control and is so indicated by the “SUPPLY” LED on the display module. The Perishable temperature range demands high accuracy. The unit is capable of maintaining supply air temperature to within ¦0.25_C(¦0.5_F) of the set point temperature setting. In Perishable range above

-- 1 0 _C(+14_F), or --5_C(+23_ F) optionally, control is

maintained by controlling the positions of the suction

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modulation valve (SMV) and suction solenoid valve (SSV) with the compressor energized.

3. The control probe (i.e.; Supply 1) temperature is

less than set point, plus 0.25_C.

When pulling down from a control temperature that is more than 5_C(9_F) above set point, both valves will be open to reduce the pulldown time unless suction solenoid override or current limiting is activated. See section 2.10 for explanation of suction solenoid override. The current limit function will restrict the valves if the current is above the selected value. When the controlling probe temperature reaches set point, the suction solenoid valve will close.

When the controlling probe temperature enters the in-range temperature tolerance as selected at function code Cd30, the in-range light will energize.

The Controller logic is designed so the suction modulation valve will begin to close as the set point is reached. The modulation valve will close to restrict refrigerant flow until the capacity of the unit and the load are balanced, unless the compressor reliability enhancement logic on the first compressor start prevents closure.

If the temperature drops below the set point, the compressor will remain running for a few minutes. This is to accommodate any initial undershoot which might occur. After this time, and at 0.2_C (0.4_F) or greater below the set point, the compressor will be turned OFF.

The heaters will be energized if the temperature drops to

0.5_C (0.9_F) below the set point. The heaters will de-energize when the temperature rises to 0.2_C (0.4_F) below the set point. The compressor will not restart until the temperature rises to 0.2_C (0.4_F) above the set point and a three minute time delay since the last compressor turn off has been satisfied.

b. Operation in the dehumidification mode

(Code 33 value selected) -- Optional

The dehumidification mode is activated by selecting Code 33, choosing a desired relative humidity value, and pressing the ENTER key. The control probe LED (supply 1) will flash ON and OFF every second to indicate that the dehumidification mode is active. Once the Mode is active and the following conditions are satisfied, the Controller will activate the heat relay to begin dehumidification.

1. The humidity sensor reading is above the set point and valid (AL67).

2. The pulldown mode is NOT active. (ie., The SSV valve is closed, and the control temperature is less than 5_C above set point. )

4. Temperature control set point is greater than -- 1 0 _C (+14_F), or --5_C(+23_F) optionally, in the perishable range, and the compressor is running.

5. The heater debounce timer (three minutes) has timed out.

6. Heater termination thermostat (HTT) is closed.

7. The Controlled Atmosphere (CA) option VENT or Pre-Trip mode is not initiated.

8. Humidity sensor alarm is not active (AL67).

9. High pressure switch (HPS) is not open.

If the above conditions remain true for at least one hour the evaporator fans will switch from high to low speed operation (on units so equipped). The evaporator fan speed will switch every hour thereafter as long as all conditions are met (see Bulb Mode section for different evaporator fan speed options). If any condition except for item (1.) becomes false OR if the relative humidity sensed is 2% below the dehumidification set point, the high speed evaporator fans will be energized.

The dehumidification mode appliespower to the defrost and drain pan heaters. This added heat load causes the Controller to open the modulating valve to match the new total heat load while still holding the supply air temperature very close to the set point.

Opening the modulating valve reduces the temperature of the evaporator coil surface, which increases the rate at which water is condensed from the air passing through the coil. Removing water from the air reduces the relative humidity. When the relative humidity sensed is 2% below the set point (function code Cd33), the Controller de-energizes the heat relay. The Controller will continue to cycle heating to maintain relative humidity below the selected set point.

Two timers are provided in the Dehumidification mode to prevent rapid mode switching and consequent contactor wear. They are:

S Heater debounce timer (three minutes).

S Out-of-range timer (five minutes).

The heater debounce timer is activated whenever the heat contactor status is changed. The heat contactor remains energized (or de-energized) for at least three minutes even if theset point criteria aresatisfied. This is to prevent rapid cycling of the heat contactor when the humidity set point is satisfied. If the mode is terminated by a condition other than the humidity sensor, e.g., an

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out-of-range or compressor shutdown condition, the heat relay is de-energized immediately.

The out-of-range timer is provided to allow the heaters to remain energized during a temporary out-of-range condition. If the control probe temperature remains outside of the user selected in-range setting for more than five minutes, the heaters will be de-energized to allow the system to recover. The out-of-range timer starts as soon as the temperature exceeds the in-range tolerance value set by function code Cd30.

Cooling capacity reduction by modulation is the same as described for the conventional operating mode when any of the above first four conditions (1. thru 4.) are invalid.

minutes and the above mentioned cycle will be repeated, just as it was from the start of the cooling or heating cycle. If theunit is not equipped with dual speed evaporator fans, then economy mode perishable will perform exactly the same as the normal control mode.

d. Operation in bulb mode (Code 35 set to bulb and

Code 33 selected)

Bulb mode is an extension of the dehumidification mode. Dehumidification must be enabled by selecting a value (percentage of relative humidity) at function code Cd33 before bulb mode function code Cd35 can be initiated.

With set points below --10_C(+14_F), or -- 5_C (+23_F) optionally, heating and dehumidification are locked out.

c. Operation in the economy mode

(Code 34 set to ON)

The economy mode selection determines the status of the economy mode of operation. There are two values: “ON” and “OFF.” A code which represents the status of this function is recorded in the DataCorder memory whenever the value is changed.

Economy mode is a user selectable mode of operation provided for power saving purposes. Economy mode could be utilized in the transportation of temperature tolerant cargo or non-respiration items which do not require high airflow for removing respiration heat.

The economy mode is activated by selecting function code Cd34 to the “ON” status.There is no active display indicator that economy mode has been activated, and a manual display of Cd34 is a way to be sure if the economy mode is or is not active.

In orderto achieve economymode perishableoperation, a perishable set point must be selected PRIOR to activating economy mode. When economy mode perishable is active, the evaporator fans will be controlled as follows: At the start of each cooling or heating cycle, thehigh speed evaporator fans will be run for three minutes. After that initial three minutes, the evaporator fans will be switched to low speed any time the supply air temperature is within ¦ 0.25_C (0.45_F) of the set point and the returnair temperature is less than or equal to the supply air temperature + 3_C (5.4_F). When the fans switch to low speed, they will run in low speed for one hour. At the end of the hour, the evaporator fans will switch back to high speed. The evaporator fans will again run in high speed for t hree

To initiate bulb mode, use the ARROW keysto scroll to function code Cd35 and change from “Nor” to “bulb.” Once the bulb mode is activated, the user may then change from the normal evaporator fan operation where the fan speed alternates every hour between low or high speed operation. This is done by toggling function code Cd36 from its default of “alt” to “Lo” or “Hi” respectively. If low speed evaporator fan operation is selected, this gives the user the additional capability of selecting dehumidification set points from 60 to 95% (instead of the normal 65 to 95%).

In addition, if bulb mode is active, the user is given the option to change the defrost termination sensor (DTS) temperature, in which defrost is terminated from the normal 25.6_C(78_F) temperature setting to 4_C (39.2_F) in 0.1_C (0.2_F) increments. The temperature set point that the DTS temperature must go below before the defrost interval timer begins counting down also changes from 0_Cto10_C as the desired DTS termination temperature is raised.

Bulb mode is terminated when:

S C ode Cd35 is set to “Nor.”

S Code Cd33 for dehumidification is set to

“Off.”

S The user changes the set point to one

that is in the frozen range.

When bulb mode is disabled by any of the abovemeans, the evaporator fan operation for dehumidification reverts to “alt”and the DTS termination setting resetsto the normal 25.6_C(78_F).

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3.1.7.2 Frozen Range Below --10_C(+14_F), or

-- 5 _C(+23_F) Optionally

For set points below -- 1 0 _C(+14_F), or --5_C(+23_F) optionally, the Controller maintains RETURN air at the set point temperature using the following modes of operation:

a. Operation in the conventional mode

(Code 33 OFF)

The return air probe is used for control and is so indicated by the LED on the display board.

The F rozen temperature range is not sensitive to minor temperature changes. The method of temperature control employed in this range takes advantage of t his fact to greatly improve the energy efficiency of the unit. Temperature control in the Frozen range at or below

-- 1 0 _C(+14_F), or --5_C(+23_F) optionally, is accomplished by cycling the compressor on and off as the load demand requires.

If thereturn air temperature in the container drops 0.2_C (0.4_F) below the set point temperature, the compressor is cycled off. When the temperature is greater than

0.2_C (0.4_F) above the set point and the three minute time delay has been met, the compressor will restart. The unit will always operate at full capacity, with both the suction modulation (SMV) and suction solenoid (SSV) valves fully open unless suction solenoid override or current limiting is activated. See section

2.10 for explanation of suction solenoid override.

To prevent on/off cycling of the compressor from occurring, a three minute compressor off time must be satisfied before the compressor will restart. Under a condition of rapidly changing return air temperature, the time delay may allow the return air temperature to rise slightly more than 0.2_C (0.4_F) above the set point temperature before the compressor can restart.

b. Operation in the economy mode (Code 34 OFF)

The economy mode is deactivated by setting function code Cd34 to the “OFF” status. Economy mode has no active display indicator to show that it is enabled, so a manual display of function code Cd34 must be performed to enable the user to see its current status. A second way to deactivate economy mode is to change the set point. Once economy mode is deactivated, the system will return to normal control mode operations.

In order to achieve economy mode frozen operation, a frozen set point temperature must be selected PRIOR to activating economy mode. When economymode frozen is active, the system will perform normal frozen mode operations except that the entire refrigeration system,

excluding the Controller, will be turned off when the control temperature is lessthan or equal to the set point -2_C, (i.e., the set point is set at --11_C and the operator subtracts --2_C, the result will equal --13_C). After an off-cycle period of 60 minutes, the unit will turn on high speed evaporator fans for three minutes, and then check the control temperature. If the control temperature is greater than or equal t o the set point + 0.2_C., the unit will restart the refrigeration system and continue to cool until the previously mentioned off-cycle temperature criteria are met. If the control temperature is less than the set point + 0.2_C, the unit will turn off the evaporator fans and restart another 60 minute off-cycle.

c. Operation in the bulb mode (Code 35 OFF)

The unit will not run in bulb mode if a frozen range set point is selected. As described in section 3.1.7.1.d., if a frozen set point is selected, dehumidification is deactivated and the temperature above which DTS must go during defrost resets to 25.6_C(78_ F).

3.2 PRE-TRIP DIAGNOSTICS

CAUTION

Pre-trip inspection should not be performed with critical temperature cargoes in the container.

NOTE

When Pre-Trip is initiated, dehumidification and bulb mode will be deactivated. At the completion of Pre-Trip, dehumidification and bulb mode must be turned back on again.

Pre-trip Diagnostics is an independent mode which will suspend the normal Control Mode activities when initiated by the user.With pre-trip diagnostics, eitherall the pre-trip tests can be executed in a defined sequence (Auto Mode), or one of the pre-trip tests can be selected to be executed (Manual Mode), based on the sequence of key selections made.

a. Starting and Terminating Pre-Trip

NOTE

Prior to starting tests, verify that Controller function codesCd04, Cd05, Cd06 and Cd07 are operational. Otherwise, tests may fail incorrectly. All alarms must be rectified and cleared.

A Pre-trip selection menu is displayed by pressing the PRE-TRIP key. This accesses a test selection menu. If no selection is made, the pre-trip menu selection process will terminate automatically. Pre-Trip will terminate if

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the VENT mode is selected on the CA Controller. The user must scroll through the selection by pressing the UP ARROW or DOWN ARROW keys, then pressing the ENTER key when the selection is made. While the tests are being executed, the user can terminate the pre-trip mode by holding the PRE-TRIP key. The unit will then resumenormal operation. If theuser decides to terminatea test but remainat the test selection menu, the user may press the UP ARROW key. When this is done all machinery outputs will be de-energized and the test selection m enu will be displayed.

The pre-trip diagnostics may also be initiated via communication, but when initiated will always attempt to execute the entire battery of tests (auto mode).

b. Current Limiting During Pre-Trip

Throughout the duration of any pre-trip mode, the Current Limit processing is active.

c. Test Codes

A detailed description of the pre-trip test codes is listed in Table 3-5.

3.2.1 Pre-Trip

In this mode, the unit will automatically test unit components using internal measurements and comparison logic, and will provide a “PASS” or “FAIL” display to indicate the results of each test.

If the user depresses the PRE-TRIP key, the unit gives access to a pre-trip selection menu. The contents of the menu are as follows:

Any test may be interrupted by pressing the UP ARROW key. This will return the user to the test selection mode described above, and all machinery outputs will be de-energized.

While certain tests from “Auto 1” are running, “PX-X” will appear on the left display, where the X’s indicate the test number and sub-test. The right display will show a countdown time in minutes and seconds, indicating how much time there is left remaining in the test.

For “Auto 2,” the left display will show “PX-X,” while the right display will show applicable data.

a. Manual Test Operation

Individually selected tests, other t han the LED/Display test, will perform the operations necessary to verify the operation of the component under test. At the conclusion of the selected test, PASS or FAIL will be displayed. Upon failure, the Supply and Return LED’s will flash on alternately. This message will remain displayed for up to three minutes, during which time a user may select another test. If the three minute time period expires, the unit will terminate pre-trip and return to control mode operation. Following any individually selected test, all outputs will be de-energized.

b. Auto Test Operation From Keypad

If “Auto,” “Auto 1” or “Auto 2” test is initiated, then the unit will execute a series of consecutive tests, each related to an identifiable unit component, without any need for direct user interface. These tests vary in length, depending on the component under test.

PRE-TRIP SELECTION MENU

Auto or Auto 1 Auto 2 (Op tional)

P, P1, P2, P3, P4, P5, P6, rSLts

P, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, rSLts

If the pre-trip was last executed manually after power up, the last menu selection will appear on the left display. If pre-trip was not executed since power up, then theright display will show “Auto”or “Auto1.” The user may scroll through the test selection menu using the arrow keys.

A given test is selected by pressing ENTER while it is displayed. The entire battery of tests may be run by pressing ENTER while “Auto 1” or “Auto 2” is displayed.

During this selection m ode, failure to press either an arrow key or ENTER for five seconds will return the unit to its default display, and normal operating mode.

When an automatic test fails, it will be repeated once automatically. A repeated test failure will cause“FAIL” to be shown on the right display, with the corresponding test number to the left. The user may then press the DOWN ARROW to repeat the test or the UP ARROW to skip tothe next test. The unit will wait indefinitely user input. Holding the PRE-TRIP key will terminate the pre-trip mode operation.

When “Auto” or “Auto 1” is allowed to run to completion without being interrupted, the unit will exit the pre-trip mode, and return to normal control operation.

CAUTION

When“Auto2”isallowedtorunto completion without being interrupted, the unit will terminate pre-trip and display “Auto 2” “end.” The unit WILL REMAIN SUSPENDED in this mode until the user depresses the ENTER key!

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c. Auto Test Operation From Serial

Communications

Pre-trip may also be initiated via communications. The operation is the same as for the Auto Test mode described above except that should a test fail, the pre-trip mode will automatically terminate. When initiated via communications, a test may not be interrupted with an arrow key, but the pre-trip mode can be terminated with the PRE-TRIP key.

3.2.2 Pre-Trip Mode

Table 3-5. Pre-Trip Test Codes

d. Pre-Trip Test Results

At the end of the pre-trip test selection menu, the message “P,” “rSLts” will be displayed. Pressing the ENTER key will allow the user to see the results for all subtests (i.e., 1-0, 1-1,etc). The results will be displayed as “PASS” or “FAIL” for all the tests run to completion since powerup. If a test has not been run since power up, “----------” will be displayed.

CODE

TITLE DESCRIPTION

NOTE

“Auto” or “Auto1” menu includes the following: P, P1, P 2, P3, P4, P 5, P6 and rSLts. “Auto2’ (Optional) menu includes the following: P, P1, P2, P3, P4, P5, P6,P7, P8, P9, P10 and rSLts. (Refer to section 3.2.1. )

All lights and display segments will be energized for five seconds at the start of

P Pre-Trip Initiated

P1-0 Heaters Turned On

P1-1 Heaters Turned Off

P2-0 Condenser Fan On

P2-1 Condenser Fan Off

Low Speed

Evaporator Fans

Low Speed

P3-0

P3-1

P4-0

Evaporator Fan Motors On

Low Speed Evaporator Fan Motors Off

High Speed Evaporator Fan Motors On

the pre-trip. Since the unit cannot recognize lights and display failures, there are no test codes or results associated with this phase of pre-trip.

Setup: Heater must start in the OFF condition, and then be turned on. A current draw test is done after 15 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified.

Setup: Heater must start in the ON condition, and then be turned off. A current draw test is done after 10 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified.

Requirements: Water pressure switch (WP) input must be closed. Setup: Condenser fan is turned ON, a current draw test is done after 15

seconds. Pass/Fail Criteria: Passes if change in current draw test is within the range specified.

Setup: Condenser fan is turned OFF, a current draw test is done after 10 seconds. Pass/Fail Criteria: Passes if change in current draw test is within the range specified.

Requirements: The unit must be equipped with a low speed evaporator fan, as determined by the Evaporator Fan speed select configuration variable. NOTE: If the unit is configured for single evaporator fan operation, Pre-Trip tests P3-0, P3-1, P4-0 and P4-1 will fail immediately if Controller alarm codes AL11 or AL12 are active at the start of testing.

Setup: The high speed evaporator fans will be turned on for 10 seconds, then off for two seconds, then the low speed evaporator fans are turned on. A current draw test is done after 60 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test.

Setup: The low speed Evaporator Fan is turned off, a current draw test is done after 10 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test.

Setup: The high speed Evaporator Fan is turned on, a current draw test is done after 60 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test.

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CODE

High Speed

P4-1

P5-0

P5-1 Supply Probe Test

Evaporator Fan Motors Off

Supply/Return Probe Tes t

DESCRIPTIONTITLE

Setup: The high speed Evaporator Fan is turned off, a current draw test is done

after 10 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range specified. Fails if AL11 or AL12 activates during test.

Setup: The High Speed Evaporator Fan is turned on and run for eight minutes, with all other outputs de-energized. Pass/Fail Criteria: A temperature comparison is made between the return and supply probes. NOTE: If this test fails, “P5-0” and “FAIL” will be displayed. If both Probe tests (this test and the PRIMARY/ SECONDARY) pass, the display will read “P5” “PASS.”

Requirements: For units equipped with secondary supply probe only. Pass/Fail Criteria: The temperature difference between primary and secondary probe (supply) is compared.

NOTE

If this test fails, “P5-1” and FAIL will be displayed. If both Probe tests (this and the SUPPLY/ RETURN TEST) pass, because of the multiple tests, the display will read ’P 5’ ’PASS’.

Requirements: For units equipped with secondary return probe only. Pass/Fail Criteria: The temperature difference between primary and secondary

probe (return) is compared.

NOTES

P5-2 Return Probe Test

Single Speed

P6-0

P-6

Compressor Test (For single speed units)

Dual Speed Compressor Tests (For dual speed units)

S If this test fails, “P5-2” and “FAIL” will be displayed. If both Probe

tests (this test and the SUPPLY/ RETURN) pass, because of the multiple tests, the display will read “P 5,” “PASS.”

S The results of Pre-Trip tests 5-0, 5-1 and 5-2 will be used to activate or

clear control probe alarms.

Setup: The compressor is started. If it is the first compressor start, the compressor reliability enhancement logic (CREL) is executed, running a current draw test with the additional outputs (if installed) in the following states:

Component

SSV Closed Open

SMV 70% 100% (for 3 minutes) then 70%

Setup: Prior to this testing the ambient temperature is checked. If the ambient temperature is less than 60_F, the high speed compressor test will run first. If the ambient temperature is greater than 60_F, or if the ambient temperature is invalid, the low speed compressor test will run first. Once the first compressor test has been completed, the switch over to the other compressor test will follow. Upon entry to this test section, the high speed evaporator fan should already be running, if not, it is started. After the evaporator fan has run for five seconds, the high speed condenser fan is started. After the condenser fan has run for five seconds, the compressor test is run.

Normal Logic

(10 seconds)

CREL (3 minutes)

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CODE

6-H

ts)

6-L

ts)

High Speed Compressor Tests

(For dual speed

Low Speed Compressor Tests

(For dual speed

P6-2

P6-3 Quench Valve Test

P6-4

P6-5

Suction Modulation Valve (Open)

Suction Modulation Valve (Closed)

Suction Solenoid Val v e

DESCRIPTIONTITLE

Setup: The compressor is started. If it is the first compressor start, the

compressor reliability enhancement logic (CREL) is executed, running a current draw test with the additional outputs (if installed) in the following states:

Component

SSV Closed Open

SMV 20% 100% (for 3 minutes) then 20%

Pass/Fail Criteria: Passes if the change in current draw is within the valid range.

Setup: The compressor is started. When ambient temperature is greater than 60_F, a two minute CREL is executed. If the ambient temperature is less than 60_F, a three minute CREL is executed. Then a current draw test is done for 10 seconds with the additional outputs (if installed) in the following states:

Component

SSV Closed Closed Closed

SMV 20% 20%

Pass/Fail Criteria: Passes if the change in current draw is within the valid range.

Setup: The suction modulation valve (SMV) is opened to 100% unless restricted by current limit function, and the unit is run for two minutes. Pass/Fail Criteria: The supply and return probe temperature reading difference is compared to a predetermined value.

Setup: The compressor suction temperature is measured with the Quench valve closed. The Quench valve is energized and the suction temperature drop is checked.

Pass/Fail Criteria: Passes if suction temperature is within the valid range. Setup: The heaters are energized. The suction modulation valve is set to 100%,

and run for one minute. At the end of the one minute run, the supply temperature is subtracted from the return temperature and the result is saved (reading 1).The SMV is dropped to 60% and run for one minute. At the end of this one minute run, the supply temperature is again subtracted from the return temperature and the result is saved (reading 2). Pass/Fail Criteria: If the difference between reading 1 & 2 is within a predetermined range, the test passes. If current limiting occurs, the test passes.

Requirements: The unit must be equipped with a suction solenoid valve (SSV). Current limiting may close SSV. If this happens, the test will automatically pass. Setup: The SSV is opened, the suction modulation valve (SMV) is closed. The quench valve (if configured) will operate according to normal operating rules. If the return temperature probe is lower than --5.0_C, the test is run for two minutes, otherwise for one minute. Condenser Pressure Control (CPC) logic is used for this test if the controller is configured for it. Pass/Fail Criteria: If the SSV is closed due to current limiting, the test passes. If supply and return probes are invalid, the test fails. If the test is within a predetermined range, the test passes. The SSV is closed following this test.

Normal Logic

(10 seconds)

Normal Logic

(10 seconds)

CREL (3 minutes)

CREL (2

minutes)

CREL (3

minutes)

100% (for 3

minutes) then 20%

SECTION 3

3-21 T-268-07

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CODE

HighPressur

DESCRIPTIONTITLE

NOTE

Starting with test P7-0 through test P10, these tests are only included with the “Auto2” (Optional) selection menu. (Refer to section 3.2.1.)

Setup: When the unit is running, the condenser fan is de-energized, and a 15 minute timer is started. The right display shows discharge pressure if equipped with the discharge pressure transducer (DPT), or condenser pressure if equipped with a condenser pressure transducer (CPT), or discharge pressure if equipped with either a discharge pressure transducer (DPT) or a condenser pressure transducer (CPT). Pass/Fail Criteria: The test fails if high pressure switch fails to open in 900 seconds.

Note, this test is skipped if the unit does NOT have:

S A compressor discharge sensor (CPDS).

S A discharge pressure transducer (DPT).

S C ondenser pressure transducer (CPT).

In addition, this test is skipped if:

S The sensed ambient temperature is less than 7_C(45_F).

S The return air temperature is less than --17.8_C(0_F).

S The water pressure switch (WP) is open, indicating that the unit is

High Pressure

7-0

Switch Closed

Pass/Fail Criteria: Under conditions of the above Note, the test immediately fails if the following inputs are sensed to be invalid:

operating with a water-cooled condenser.

S C ompressor discharge sensor (CPDS).

P7-1

P8-0

High Pressure Switch Open

Perishable Mode Heat Test

S Discharge pressure transducer (DPT).

S C ondenser pressure transducer (CPT).

OR if any one of the following inputs are sensed to be invalid:

S Return temperature sensor (RTS).

S Ambient sensor (AMBS).

In addition, the test will fail if:

S The high pressure switch (HPS) fails to open within 15 minutes.

S The discharge temperature exceeds 138_C (280_F).

S The discharge temperature is less than or equal to ambient temperature

plus 5_C(9_F).

S The condenser pressure transducer (CPT) or discharge pressure

transducer (DPT) pressure exceeds 27.42 kg/cm

Requirements: Test P7-0 must pass for this test to execute. Setup: The condenser fan is started and a 60 second timer is started. Pass/Fail Criteria: Passes the test if the high pressure switch (HPS) closes within the 60 second time limit, otherwise, it fails.

Setup: If the container temperature is below 60_F, the set point is changed to 60_F, and a 60 minute timer is started. The left display will read “P8-0.” The control will then heat the container until 60_F is reached. If the container temperature is above 60_F at the start of the test, then the test proceeds immediately to test P8-1 and the left display will change to “P8-1.” Pass/Fail Criteria: The test fails if the 180 minute timer expires before the control temperature reaches set point. The display will read “P8--0,” “FAIL.”

(390 psig).

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CODE

P8-1

P8-2

P9-0 Defrost Test

P10-0

Perishable Mode Pull Down Test

Perishable Mode Maintain Temperature Test

Frozen Mode (Setup) Test

DESCRIPTIONTITLE

Requirements: Control temperature must be at least 60_F. Setup: The set point is changed to 32_F, and a 180 minute timer is started. The

left display will read “P8-1,” the right display will show the supply air temperature. The unit will then start to pull down the container temperature to the 32_Fset point. Pass/Fail Criteria: The test passes if the container temperature reaches set point before the 180 minute timer expires.

Requirements: Test P8-1 must pass for this test to execute. Setup: The left display will read “P8-2,” and the right display will show the supply

air temperature. A 60 minute timer is started. The unit will be required to maintain the 32_F temperature to within + or -- 0.5_C(0.9_F) of set point until a DataCORDER recording is executed. The recorder supply probe temperature running total (and its associated readings counter) will be zeroed out for the remainder of the recording period at the start of this test, so that the actual value recorded in the DataCORDER will be an average of only this test’s results. Once a recording interval is complete, the average recorder supply temperature will be recorded in the DataCORDER, as well as stored in memory for use in applying the test pass/fail criteria. Pass/Fail Criteria: If the recorded temperature is within +/-- 0.5_C. of set point from test start to DataCORDER recording, the test passes. If the average temperature is outside of the tolerance range at the DataCORDER recording, the test fails.

Setup: The defrost temperature sensor (DTS) temperature will be displayed on the left display. The right display will show the supply air temperature. The unit will run FULL COOL for 30 minutes maximum while the DTS sensor temperature is above 10_C. Once the DTS is below 10_C, the unit simulates defrost by running the heaters for up to two hours, or until the DTS senses the temperature above 25.6_ C. Pass/Fail Criteria: The test passes if DTS is sensed above 25.6_C before a two hour timer times out. The test fails if DTS does not go below 10_C after 30 minutes of full cooling, and/or the heater termination thermostat (HTT) is open when the DTS is below 10_C. The test also fails if the HTT opens anytime during the defrost cycle and/or the return air temperature exceeds 120_F anytime during the heat cycle.

Setup: After completion of the DTS test, the set point will be set to 7_C(45_F). The left display will read “P100,” and if the container temperature is below 45_F, will continue this display until the container temperature is raised to set point. The left display will change to “P101” and execute the frozen pull down test when the container temperature reaches set point, or if the container temperature initially was greater than or equal to set point. The maximum time allowed in heat mode is one hour. Pass/Fail Criteria: If this time limit is exceeded, the test fails. There will be no pass indication for this test. However, if the test fails the display will read “P100,” “FAIL.”

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CODE

P10-1

P10-2

Frozen Mode (Pull Down) Test

Frozen Mode Maintain Temperature Test

DESCRIPTIONTITLE

Setup: When the container temperature is greater than or equal to the 45_F. set point which was set in the frozen mode heat test, the left display will read “P101” and the right display will show the return air temperature. The set point will then be changed to --17.7_C(0_F). The unit will then have a maximum of three hours to pull the container temperature down to the 0_F set point. Pass/Fail Criteria: If this occurs within the three hour time limit, the test passes. If pulldown is not completed within the three hour time limit, the test fails.

Setup: After the unit has successfully completed the frozen pulldown test, the left display will read “P102” and the right display will show the return air temperature. The unit will then be required to maintain the 0_F temperature within + or -- 0.5_C(0.9_F) of set point until a DataCORDER recording is executed. The recorder return probe temperature running total (and its associated readings counter) will be zeroed out for the remainder of the recording period at the start of this test, so that the actual value recorded in the DataCORDER will be an average of only this test’s results. Once the recording interval is complete, the average recorder return temperature will be recorded in the DataCORDER, as well as stored in memory for use in applying the test pass/fail criteria. Pass/Fail Criteria: If the recorded temperature is within +/-- 0.5_C of set point from test start to DataCORDER recording, the test passes. If temperature is outside of the tolerance range at the DataCORDER recording, the test fails.

3.3 INTEGRATED DATACORDER (OPTIONAL)

3.3.1 Brief Description

Carrier Transicold has developed a recorder, which we have termed the “DataCORDER,” and is integrated into a module with the Controller. F or reader simplicity and understanding this sectionhas been separated t o explain the DataCORDER side of the module. The DataCORDER consists of:

S Microprocessor

S Program memory

S Data memory

S Internally batte ry backed r eal time clock

S Six ther mistor inputs

S Two communication ports

S Power supply (optional batte ry pack).

This recorder eliminates the mechanical recorder and paper chart, and replaces it with a custom-designed module (see Figure 3-1) that interfaces with the Interrogator and operates in the following ways:

d. Records DataCORDER/Network generated data

and events as follows:

S Container ID Change

S S/W Upgrade

S C ontroller configuration change

S Alarm Activity

S Battery Low (Battery Pack)

S Data Retrieval

S Defrost Start

S Defrost End

S Dehumidification Start

S Dehumidification End

S Power Loss (w/wo battery backup)

S Power Up (w/wo battery backup)

S “Auto 1” Pre-Trip Start

S “Auto 1” Pre-Trip End

S R emote Probe Temperatures in the C ontainer

(USDA Cold treatment and Cargo probe recording)

a. Logs data at 15, 30, 60 or 120 minute intervals.

b. Records and displays alarms through the digital

display module. (Refer to Table 3-7.)

c. Stores at least two years’ worth of data based on

typical one hour intervals.

S Return Air Temperature

S Set Point Change

S Supply Air Temperature

S Real Time Clock (RTC) Battery (Internal

Battery) Replaced

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S Real Time Clock (RTC) Modification S Pre-Trip result & data S Trip Start

S ISO Trip Header (Must be entered first via

Interrogation program)

S Economy Mode Start S Economy Mode End S “Auto 2” Pre-Trip Start

S “Auto 2” Pre-Trip End S B ulb Mode Start S B ulb Mode changes S B ulb Mode End

S USDA Trip Comment S CTD Controlled Atmosphere Information S Humidification Start

S Humidification End S USDA Probe Calibration

3.3.2 DataCORDER Configuration

NOTE

The DataCORDER software is integrated with the Controller software.

Configuration to factory installed default configuration is achieved via a common configuration card used for controller functions, see section 3.1.2.

Changes to the factory default configuration must be made with the Interrogation device.

Configuration:

Tells the operational software what physical components are built into the container unit, how many sensors to record, what recording interval should be used, etc..

ITEM SETTING

Sensor Logging

(Network)

Sensor Logging

(Thermistor)

Sensor Format 1or2byte 1 byte

Sensor

Configuration

Logging Interval

Average or

Snapshot

Average,

Snapshot or

USDA

Refer to section

3.3.5.f.

15, 30, 60 or

120 minutes

FACTOR Y

DEFAULT

Average

2 sensors

60 minutes

Configuration cards are available thru CTD Replacement Components Group.

The use of a programming card in the field should only occur under unusual circumstances, such as a physical component in the container unit is changed to adifferent component, resulting in a new configuration for the unit.

SECTION 3

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3.3.3 DataCORDER Function Codes

until the left window displays the desired code number

(see Table 3-6). The right windowwill display the value There are 35 functions which the operator may access to examine the operating status of the unit. To access these functions, perform the following: Press the ALT. MODE & CODE SELECT keys, press an arrow key

Table 3-6. DataCORDER Function Code Assignments

NOTE: Inapplicable Functions Display “---- ---- --” To Access: Press ALT. MODE key

CODE # TITLE DESCRIPTION

dC1

dC2

dC3-5

dC6-13

dC14

dC15-19 Future Expansion These codes are for future expansion, and are not in use at this time.

dC20-24

dC25 Future Expansion This code is for future expansion, and is not in use at this time..

dC26,27 S/N, Left 4, Right 4

dC28 Minimum Days Left

dC29 Days Stored Number of days of data that are currently stored in the DataCORDER.

dC30 Date of last Trip start

dC31 Battery Test

dC32 Time: Hour, Minute Current time on the real time clock (RTC) in the DataCORDER. dC33 Date: Month, Day Current date (month and day) on the RTC in the DataCORDER. dC34 Date: Year Current year on the RTC in the DataCORDER.

dC35

Recorder Supply Temperature

Recorder Return Temperature

USDA 1,2,3 Temperatures

Network Sensors 1-8

Cargo Probe 4 Temperature

Temperature Sensors 1-5 Calibration

Cargo Probe 4 Calibration

Current recorder supply air temperature.

Current recorder return air temperature.

Current temperatures of the three USDA probes.

Current values of the network sensors (as configured). Network sensor 1 (Code

6) is generally the humidity sensor and its value is obtained from the Controller once every minute.

Current temperature of the cargo probe #4.

Current calibration offset values for each of the five probes: supply, return, USDA #1, #2, and #3. These values are entered via the interrogation program.

The DataCORDER serial number consists of eight characters. Function code dC26 contains the first four characters. Function code dC27 contains the last four characters. (This serial number is the same as the Controller serial number.)

An approximation of the number of logging days remaining until the DataCORDER starts to overwrite the existing data.

The date when a Trip Start was initiated by the user. In addition, if the system goes without power for seven continuous days or longer, a trip start will automatically be generated on the next AC power up.

Shows the current status of the optional battery pack. PASS -- Battery pack is fully charged. FAIL -- Battery pack voltage is low.

Current calibration value for the Cargo Probe. This value is an input via the interrogation program.

of this item for five seconds before returning to the

normal display mode. If a longer time is desired,

pressing the ENTER key will extend the time to 30

seconds after the last pressing of the ENTER key.

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3.3.4 DataCORDER Alarms

To Display Alarm Codes:

While in Set Point Selection or Default Display mode, press the ALT. MODE & ALARM LIST keys. This accesses the Alarm List Display Mode, which displays any alarms stored in the Alarm Queue. The user may scroll to the end of the alarm list by pressing the UP ARROW key after the ALARM LIST key is depressed. Depressing the DOWN ARROW key allows the user to scroll backward in the alarm list.

The left display will show “AL#” where # is the alarms number in the queue.

The right display will show:

S “AAXX,” if the alarm is active, where XX is

the alarm number. See Table 3-7, DataCORDER Alarm Indications.

S “IAXX,” if the alarm is inactive

“END” is displayed to indicate the end of the alarm list if any alarms are active. “CLEAr” is displayed if all the alarms in the list are inactive.

S The exception to this rule is the

DataCORDER Alarm Queue Full AL91 alarm, which does not have to be inactive in order to clear the alarm list.

To Clear the Alarm List:

If no alarms are active, the Alarm Queue may be

cleared.

S Press the ALT. MODE & ALARM LIST

keys.

S Press the UP/DOWN ARROW key until

“CLEAr” is displayed.

S Press the ENTER key. The alarm list will

c l e a r a n d “ -- -- -- -- -- ” w i l l b e d i s p l a y e d .

S Press the ALARM LIST key. “AL” will show

o n t h e l e f t d i s p l a y a n d “ -- -- -- -- -- ” o n t h e r i g h t display when there are no alarms in the list.

S Upon clearing of the Alarm Queue, the Alarm

light will be turned off.

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Page 66

Table 3-7. DataCORDER Alarm Indications

To Access: Press ALT. MODE key

CODE # TITLE DESCRIPTION

The recorder supply air temperature is sensed outside of the range of

-- 5 0 _Cto70_C(--58_F to +158_F) or if the probe check logic has determined there is a fault with this sensor.

NOTE

AL70

Recorder Supply Temperature Out of Range

The P5 Pre-Trip test must be run to inactivate the alarm (refer to section

3.2.1).

The recorder return air temperature is sensed outside of the range of

-- 5 0 _Cto70_C(--58_F to +158_F) or if the probe check logic has determined there is a fault with this sensor.

NOTE

AL71

Recorder Return Temperature Out of Range

The P5 Pre-Trip test must be run to inactivate the alarm (refer to section

3.2.1).

AL72-74

AL75

AL76, 77 Future Expansion These alarms are for future expansion, and are not in use at this time.

AL78-85

USDA Temperatures 1, 2, 3 Out of Range

Cargo Probe 4 Out of Range

Network Sensors 1 -- 8 Out of Range

The USDA probe temperature reading is sensed outside of range.

The cargo probe temperature reading is sensed outside of range.

The network sensor is outside of its specified range. See NOTE below.

NOTE

While the DataCORDER is normally setup to record only supply and return recorder sensors, the DataCORDER has the capability to record the data of eight additional sensors. Any sensor installed on the unit may be recorded, and are identifiable as Network Sensors AL 78 to AL85. Which alarm (AL78 to AL

85) is associated with the physical sensor, depends on how the DataCORDER was configured. To identify which sensor is at fault, the unit must be interrogated to locate the sensor being recorded. Generally, the humidity sensor is AL78, as it is the only network sensor recorded.

AL86 RTC Battery Low

AL87 RTC Failure

AL88

AL89 Flash Memory Error

AL90 Future Expansion This alarm is for future expansion, and is not in use at this time. AL91 Alarm List Full The DataCORDER alarm queue is determined to be full (eight alarms).

DataCORDER EEPROM Failure

The Real Time Clock (RTC) backup battery is too low to adequately maintain the RTC reading.

An invalid date or time has been detected. This situation may be corrected by changing the Real Time Clock (RTC) to a valid value using the DataView.

A write of critical DataCORDER information to the EEPROM has failed.

An error has been detected in the process of writing daily data to the non-volatile FLASH memory.

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The DataCORDER alarms for the USDA and cargo probes areconfigurable using the interrogation program or via a configuration card. There are four configuration variables for the DataCORDER, which are listed in Table 3-8 with their descriptions and selection values.

Table 3-8. DataCORDER Alarm

Configurations

Configuration

Variable

dCF07 USDA (PR1) Auto,On,Off dCF08 USDA (PR2) Auto,On,Off dCF09 USDA (PR3) Auto,On,Off dCF10 Cargo Probe (PR4) Auto,On,Off

Description

Selection

Values

The default configuration for the four probes is “Auto.” If the alarms are configured as “Auto,” and all the probes are missing (i.e., appear open-circuited to the DataCORDER), no alarms are activated. As soon as one of the probes is installed (plugged into the receptacle), then all of the alarms are enabled and the remaining probes that are not installed will give active alarm indications. This function is designed to assist those users who wish to keep their DataCORDER configured for USDA recording, and do not wish to install t he probes for every trip.

If a probe alarm is configured to be “On,” then the associated alarm is always enabled. As long as the probe remains in-circuit (plugged in), the alarm will not be activated. Probes with this configuration have alarms that actlike the alarms forthe supply and return recorder sensors. It is presumed that normal operation includes the probe in question.

If aprobe alarm is configuredto be “Off,” then the alarm for this probe is always disabled. It is not possible to activate the respective alarm for this probe no matter what the circumstance.

3.3.5 Access to DataCORDER Func tions

To access the DataCORDER functions codes, alarm codes, configuration and scrollback, the user must first press the ALT. MODE key, then press the applicable key for functions (CODE SELECT) or alarms (ALARM LIST).

a. Keypad/Display Interface

The DataCORDER uses the Controller display and keypad. The DataCORDER contains four types of display parameters. They are: functions codes, alarm codes, configuration and scrollback.

b. DataCORDER Power-Up

The DataCORDER may be powered up in several ways:

1. Normal AC power: The DataCORDER is powered

up when the unit is turned on via the stop-start switch

(ST).

2. Normal DC power: If a rechargeable battery pack is

installed (fully charged), the user may plug the

interrogation cable into the front interrogation

receptacle and the DataCORDER will power up for

communications.

On every DataCORDER wake-up, while using

battery-pack power, the Controller will first perform a

hardware voltage check on the battery. If the hardware

check passes, the Controller will energize the

appropriate circuitry and perform a software battery

voltage check before DataCORDER logging. If either

the hardware or software battery test fails, the real time

clock (RTC) battery-backed wake-up will be disabled

until the next AC power cycle. Further DataCORDER

temperature logging will be prohibited until that time.

A 12 volt VCR battery pack may also be plugged into

the back of the interrogation cable, which is then

plugged into either interrogation port. No rechargeable

battery pack is required with this method. The user may

now interrogate the DataCORDER.

3. Real Time Clock (RTC) because a logging interval

has expired: If the DataCORDER i s equipped with a

charged battery pack and AC power is not present, the

DataCORDER will power up when the RTC indicates

that a data recording should take place. When the

DataCORDER is finished recording, it will power

down.

c. DataCORDER Battery Pack Test

If the DataCORDER has the optional battery pack, then

the battery voltage will be tested once every five

minutes. An alarm will be generated when the battery

voltage transitions from good to bad indicating that the

battery pack needs recharging. If the alarm condition

persists for more than 24 hours on continuous AC

power, the battery pack probably needs replacement.

d. Trip Start Processing

To initiate Trip Start:

S Press the ALT. MODE key

S Select function code dC30

S Depress the ENTER key for five seconds

Trip Start will flash for five seconds, turn solid, then the

date willappear to indicatethat a Trip Start is registered.

Trip Start may also be initiated via communications

using the interrogation program.

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e. Display vs. Configuration Codes

Standard Mode:

The DataCORDER containstwo types of display codes; Display and Configuration. Display codes will display parameter values, but will not let them be modified. Configuration codes can be modified via the interrogator or with the insertion of the common configuration software card.

f. Data Recording Mode

The DataCORDER recording mode is labeled as Standard. To see an exampleof a report using a standard configuration, see Figure 3-3.

Generic Mode:

The generic recording mode is used for special data recordings. The user may select up to eight different sensor readings. The sensors available for this type of recording are listed below. C hanging the configuration to generic and selecting which sensors to record may be done via the Interrogation program.

Configurable Generic Recording Options:

S C ontrol mode

S Control temperature

S Frequency

S Humidity (Standard configuration: 6 or 64)

S Phase A current

S Phase B current

S Phase C current

S Mains voltage

S S uction modulation valve (SMV) percentage

S Discrete outputs (Bit mapped -- require

special handling if used)

S Discrete inputs (Bit mapped -- require special

handling if used)

S Ambient sensor (AMBS)

S Compressor suction sensor (CPSS)

S C ompressor discharge sensor (CPDS)

The standard recording mode allows the user to

configure the DataCORDER to monitor data using one

of seven standard configurations. The seven standard

configuration variables, with their descriptions, are

listed in Table 3-9.

The six thermistor inputs (supply, return,USDA #1, #2,

#3 and cargo probe) and the humidity sensor will be

DataCorder inputs. The three inputs will be read over a

network from the Controlled Atmosphere module.

In addition, if NO Controller alarms are active, the most

recent active DataCORDER alarm will be displayed on

the Display Module alternately with set point.

Table 3-9. DataCorder Standard Configuration

Standard

Configura-

tion

2 sensors

(dCF02 = 2)

5 sensors

(dCF02 = 5)

6 sensors

(dCF02 = 6)

9 sensors

(dCF02 = 9)

6 sensors

(dCF02 = 54)

7 sensors

(dCF02 = 64)

10 sensors

(dCF02 = 94)

* Not Available on models 69NT40-511 or 69NT40-521.

2 thermistor inputs(supply & return)

* 3 Controlled Atmosphere inputs

2 thermistor inputs(supply & return)

1 cargo probe (thermistor input)

2 thermistor inputs(supply & return)

1 cargo probe (thermistor input)

2 thermistor inputs(supply & return)

* 3 Controlled Atmosphere inputs

1 cargo probe (thermistor input)

Description

3 USDA thermistor inputs

1 humidity input

3 USDA thermistor inputs

1 humidity input

3 USDA thermistor inputs

1 humidity input

3 USDA thermistor inputs

1 humidity input

S Return temperature sensor (RTS)

S Supply temperature sensor (STS)

S Defrost termination sensor (DTS)

S Discharge pressure transducer (DPT)

S Suction pressure transducer (SPT)

S C ondenser pressure transducer (CPT)

g. DataCORDER Alarm History List

The DataCORDER contains a buffer of up to eight

alarms. The list may be displayed by pressing the

ALARM LIST key. The alarm history keypad and

display processing will be the same as the Controller

module. The format of an alarm history display entry is

as follows:

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Left Display:

Right

Display:

Or:

“dALnn” where nn = the alarm

history entry 01-08

“xA nn” where x = “I” (inactive) or “A”

(active)

“---------- ” if no alarms are currently in

the alarm history list

h. Alarm Processing

The DataCORDER contains an eight alarm history queue which will contain the first eight alarms detected by the DataCORDER. The alarms and their corresponding alarm codes are specified in Table 3-7. The alarm queue will be located in the Battery Backed RAM (BRAM). The queue will also have a corresponding status which will indicate whether each alarm is currently active or inactive. If multiple consecutive occurrences of an alarm are generated, only the first will be stored. The queue may be cleared by using the keypad. (If more than eight alarms occur before the queue is cleared, later alarms will be ignored.) In addition, AL91 alarm code will appear if the DataCORDER queue is full.

The out of range value is as follows:

Thermistor Inputs:

3.3.6 USDA/ Message Trip Comment

Low limit = --50.0 degC

High limit = 70.0 degC

A specialcase event is supported for allowing theuser to enter comments for a (USDA or any message) trip recording. The comments will be received from the interrogator and have a maximum length of 78 characters. Only one comment will be recorded per day. In theevent that multiple commentsoccur, then only the last is saved.

3.3.7 USDA Recording

A special type of recording is provided for USDA cold treatment purposes. Cold treatment recording requires three remote temperature probes to be placed at various locations of the cargo. Provision is made to connect these probes to the DataCORDER via receptacles located at the rear left-hand side of the unit. Four (five, on some units) receptacles are provided. Four (three-pin) receptacles are for the probes and one (five pin) receptacle is provided for the Interrogator. All receptacles are sized to accept a Deutsch HD16-5-16S size plug with a tricam coupling locking device. The DataCORDER inputs are designed to accept a two wire thermistor probe.

A label on the back panel of the unit shows which receptacle is used for each probe. The USDA #1, #2 and

#3 probes (and possibly the optional Cargo probe) are

installed in their receptacles.

The DataCORDER records up to six probe

temperatures (supply, return, USDA #1, #2, #3 and an

optional cargo probe #4), at the logging interval.

The standard DataCORDER report displays the supply

and return air temperatures. The cold treatment report

displays USDA #1, #2, #3 and the supply and return air

temperatures. Cold treatment recording is backed up by

a battery so recording can continue if AC power is lost.

When the Relative Humidity Set Point mode is

activated or de-activated (ie., Controller function code

Cd33), this status is stored in the DataCORDER

memory and reported at the next recording, as are like

events such as economy mode and bulb mode.

3.3.8 Pre-Trip Data Recording

The unit is equipped with the ability to record pass/fail

information along with unit data resulting from the

initiation of pre-trip (see section 3.2.2). The data is

time-stamped and may be extracted via interrogation

using CTD’s interrogation program. See Table 3-10 for

a description of the data stored in the DataCORDER for

each corresponding Pre-Trip test.

3.3.9 DataCORDER Communications

a. DataCORDER Retrieval -- Interrogation

Data retrieval from t he DataCORDER can be

accomplished with three devices: a CTD DataReader

and DataView software, a stand-alone DOS-base

portable computer with appropriate cable and

DataView software, or a Remote Monitoring Unit

(RMU).

NOTE

The RMU designation is used in the industry. Be aware that CTD uses the designation CI (Communications Interface Module) on its schematics.

The optional interrogation software for a portable computer is supplied on a 3.5 and 5.25 inch floppy disk. This software allows interrogation, screen view of the data, hard copy report generation, cold treatment probe calibration, cold treatment initialization and file management.

NOTE

Refer to Interrogation manual 62-02575 for a more detailed explanation of the interrogation software.

A short report on that interrogation can be displayed on the computer to identify key information such as Trip

SECTION 3

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Start, Power Outages, and Temperature Out-of-Range conditions.

3.3.10 DataCORDER Scrollback

The DataCORDER will display probe values for the six DataCORDER probes up to 99 hours back from the current hour. The probe values may be displayed by depressing the ALT. MODE key and then depressing the UP or DOWN ARROW keys until “dCdSP” is shown in the left display window and then depressing the ENTER key. The sensor to display can then be chosen by depressing the UP or DOWN ARROW key until the desired sensor (S for supply, r for return, P1, P2, P3 and C4 for USDA and Cargo probes) is shown in the left display window and then depressing the ENTER key. A temperaturevalue will appearin the right display window and 1 (with sensor designation) will appear in the left display window to signify the temperature displayed is the most recent reading. Each press of the DOWN ARROW key displays the temperature one hour earlier. Use the ENTER key to alternate between sensors and times/temperatures. Use the ARROW keys for scrolling. The display will return to normal if 15 seconds lapse without a key being pressed.

3.4 USDA COLD TREATMENT PROCEDURE

Sustained cold temperature has been employed as an effective postharvest method for the control of Mediterranean and certain other tropical fruit flies. Exposing infested fruit to temperatures of 2.2 degrees Celsius (36_F) or below for specific periods results in the mortality of the various stages of this group of notoriously injurious insects.

In response to the demand to replace fumigation with this environmentally sound process, Carrier has integrated this Cold Treatment capability into its DataCORDER. These units have the ability to maintain supply air temperature within one-quarter degree Celsius of setpoint and record minute changes in product temperature within the DataCORDER memory, thus meeting USDA criteria (refer to section

3.3.7).

b. Pre-cool to treatment temperature.

c. Install t he DataCORDER module battery pack (if not already installed).

d. Calibrate the three USDA probes by ice bathing the probes and performing the calibration function with the hand held DataReader or a DOS-based portable computer. This calibration procedure determines the probe offsets and stores them in the Controller foruse in generating the cold treatment report. Refer to the Interrogation manual 62-02575 for more details.

e. Place the three probes required for a USDA cold treatment procedure. The probes are placed into the pulp or the fruit at the locations defined below as the product is loaded.

Sensor 1

Sensor 2

Sensor 3

Place in pulp of the product located next to the return air intake.

Place in pulp of the product five feet from the end of the load for 40 foot containers, and three feet from the end of the load for 20 foot containers. This probe should be placed in a center carton at one-half the height of the load.

Place in pulp of product five feet from the end of the load for 40 foot containers and three feet from the end of the load for 20 foot containers. This probe should be placed in a carton at a side wall at one-half the height of the load.

f. To initiate USDA Recording begin the cold treatment recording, connect the Interrogator and perform the configuration as follows:

S Trip Start

S Trip Comment

S Configure for five probes

S One hour logging interval

S USDA temperature log in

S Two byte memory storage format

S Probe calibration

The following is a summary of the steps required to initiate a USDA Cold Treatment.

a. Pre-cool the container to the treatment temperature or below.

g. Retrieval of trip data from the DataCORDER memory can be accomplished with a DataReader and DataView software or DataView software and a DOS-based portable computer. Contact a Carrier Transicold Service Parts representative for details.

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Table 3-10. DataCORDER Pre-Trip Data

TEST # TITLE DATA

NOTE

1-0 Heater On Pass/Fail/Skip Result, Change in current for Phase A, B and C 1-1 Heater Off Pass/Fail/Skip Result, Change in currents for Phase A, B and C 2-0 Condenser Fan On Pass/Fail/Skip Result, Water pressure switch (WPS) -- Open/Closed,

Change in currents for Phase A, B and C 2-1 Condenser Fan Off Pass/Fail/Skip Result, Change in currents for Phase A, B and C 3-0 Low Speed Evaporator Fan

3-1 Low Speed Evaporator Fan

4-0 High Speed Evaporator FanOnPass/Fail/Skip Result, Change in currents for Phase A, B and C

4-1 High Speed Evaporator FanOnPass/Fail/Skip Result, Change in currents for Phase A, B and C

5-0 Supply/Return Probe Test Pass/Fail/Skip Result, STS, RTS, SRS and RRS 5-1 Secondary Supply Probe Test Pass/Fail/Skip Result 5-2 Secondary Return Probe Test Pass/Fail/Skip Result 6-0 Compressor On -- High Speed Pass/Fail/Skip Result, Change in currents for Phase A, B and C 6-1 Compressor On -- Low Speed Pass/Fail/Skip Result, Change in currents for Phase A, B and C 6-2 Suction Modulation Valve

Open

6-4 Suction Modulation Valve

Closed

6-5 Suction Solenoid Valve Open Pass/Fail/Skip Result, STS, RTS, Is current limit in effect? (Y,N)?

7-0 High Pressure Switch Closed

7-1 High Pressure Switch Open

8-0 Perishable Heat Pass/Fail/Skip Result, STS, time it takes to heat to 16_C(60_F)? 8-1 Perishable Pull Down Pass/Fail/Skip Result, STS, time it takes to pull down to 0_C(32_F)?

8-2 Perishable Maintain

9-0 Defrost Test

10-0 Frozen Mode Set-up Pass/Fail/Skip Result, STS, time unit is in heat. 10-1 Frozen Mode Pull Down Pass/Fail/Skip Result, STS, time to pull down unit to --17.8_C(0_F).

10-2 Frozen Mode Maintain

Pass/Fail/Skip Result, Change in currents for Phase A, B and C

Pass/Fail/Skip Result, STS, RTS, Is current limit in effect? (Y,N)?

Pass/Fail/Skip Result, STS, RTS, Delta T1, Delta T2,

Is current limit in effect? (Y,N)?

Pass/Fail/Skip Result, AMBS, DPT or CPT (if equipped)

Input values that component opens?

Pass/Fail/Skip Result, STS, DPT or CPT (if equipped)

Input values that component closes?

Pass/Fail/Skip Result, Averaged DataCORDER supply temperature

(SRS) over last recording interval.

Pass/Fail/Skip Result, DTS temperature at end of test, line voltage,

line frequency, time in defrost.

Pass/Fail/Skip Result, Averaged DataCORDER return temperature

(RRS) over last recording interval.

SECTION 3

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CONTAINER ABCDXXXXXXX ON 08Jul 94 FROM 15Apr94 TO 17Apr94 (DEGREES C) PAGE: 1

HEADER INFORMATION

DataCorder SN: XXXXXXXX

ALARMS REPORT

ALARM NUM FIRST ACTIVE LAST ACTIVE

CONTROLLER ALARMS:

60 17Apr94 03:28

DATACORDER ALARMS

No Alarms Reported

17Apr94 16:13

DATE: 15Apr94 23:49 Trip Start

SP Setpoint Change PS, PE Pretrip Start/End NEW SN Controller Rep. dal Datacorder Alm NEW SW Software Upgrade

Setp SupAir RetAir

USDA SUMMARY

LEGEND

DS Defrost Start DHS, DHE Dehumid Start/End NEW ID Container ID OFF Power Loss COMM NetWork Off

DE Defrost End AL Alarm Activity TS Trip Start BATT Power Loss

Figure 3-3. Standard Configuration Report Sample

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FALLING

TEMPERATURE

RISING

TEMPERATURE

+1.5_C(2.7_F)

COOLING

AIR

CIRCULATION

ONLY

+1_C(1.8_F)

+0.5_C(0.9_F)

SET POINT

--0.20_C

-- 0 . 5 _C(0.9_F)

-- 1 _C(1.8_F)

-- 1 . 5 _C(2.7_F)

COOLING

+.20_C

AIR

CIRCULATION

ONLY

NOTE

For In-range Tolerance, Refer to section 3. 1.4 Code 30.

Figure 3-4. Controller Set Point BELOW --10_C(+14_F), or --5_C(+23_F) optionally

FALLING

TEMPERATURE

RISING

TEMPERATURE

+1.5_C(2.7_F)

MODULATING COOLING *

AIR CIRCULATION ONLY

+1_C(1.8_F)

+0.5_C(0.9_F)

+.20_C

SET POINT

--0.20_C

-- 0 . 5 _C(0.9_F)

-- 1 _C(1.8_F)

-- 1 . 5 _C(2.7_F)

MODULATING COOLING *

AIR CIRCULATION ONLY

HEATINGHEATING

NOTE

For In-range Tolerance, Refer to section 3. 1.4 Code 30.

* For Two-Speed compressor operation refer to Figure 3-6.

Figure 3-5. Controller Set Point ABOVE --10_C(+14_F), or --5_C(+23_F) optiona lly

SECTION 3

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STEP

Compressor Starting Sequence

* Operating capacity is the required capacity to maintain

container box temperature.

** Required voltage is a function of operating capacity and

supply frequency.

Low Speed Soft Start (See Note A & B)

Run For 2 Minutes

YES

Was Ambient Greater Than 60 ˚FDuringStart?

YES

Are High Speed Switch Over Conditions Satisfied ? (Refer To Steps “J & L”)

Is Supply Voltage Greater Than Required Voltage ** ?

Continue In Low Speed

Is Ambient

YES

Temperature Less Than 60 ˚F?

YES

High Speed Start

Does High Pressure Switch (HPS) Trip ?

Has Compressor Run For 20 Minutes ?

YES

Has Set Point Been Reached ?

YES

Is The Operating Capacity * Below Low Speed Capacity ?

YES

NOTE A

Is Supply Voltage

Greater Than Required Voltage ** ?

Low Speed Soft Start (See Note B)

YES

During compressor operation, if at anytime the High Pressure Switch (HPS) trips, the logic will switch to Low Speed Soft Start.

NOTE B

Low Speed Soft Start is performed by closing the

Run 20 Minutes

Continue In Low Speed

SMV to 0% opening for ten seconds during the start-up of the compressor. The SMV

Is Supply 3 ˚FAboveSetPoint

Or Is Operating Capacity *

Greater Than Low Speed Capacity ?

opening is then gradually increased to the desired value at the rate of a 3% opening per second.

YES

Figure 3-6. Two-Speed Compressor Speed Change Logic -- Perishable Range Only

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STEP

Compressor Starting Sequence

Is Ambient Temperature Less Than 60 ˚F?

YES

High Speed Start

Has Set Point Been Reached ?

Continue In High Speed

YES

Low Speed Soft Start (See Note A & B)

Has Set Point Been Reached ?

Run For 2 Minutes

Compressor Cycles OFF

YES

NOTE A

During compressor operation, if at anytime the High Pressure Switch (HPS) trips, the logic will switch to Low Speed Soft Start.

NOTE B

Low Speed Soft Start is performed by closing the SMV to 0% opening for ten seconds during the start-up of the compressor. The SMV opening is then gradually increased to the desired value at the rate of a 3% opening per second.

SECTION 3

Figure 3-7. Two-Speed Compressor Speed Change Logic -- Frozen Range Only

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SECTION 4

OPERATION

4.1 PRE-TRIP INSPECTION (Before Starting)

WARNING

Beware of unannounced starting of the evaporator and condenser fans.

a. If container is empty, check inside for the

following:

1. Check channels or “T” bars on floor for cleanliness. Channels must be free of debris for proper air circulation.

2. Check container panels, insulation and door seals for damage. Effect permanent or temporary repairs.

3. Visually check evaporator fan assembly clamp bolts for proper securement (refer to section 6.15).

4. Check for dirt or grease on evaporator fan or fan deck and clean if necessary.

5. Check evaporator coil for cleanliness or obstructions. Wash with fresh water. (Refer to section 6.13.)

d. Open Partlow recording thermometer door (if so

equipped) and do the following:

1. Manually wind clock on key wound recording thermometer (key is located in a clip.) KEY MUST STAY WITH THE THERMOMETER. Check battery on battery powered recording thermometer.

2. Lift stylus (pen) by pulling the marking tip outward until the stylus arm snaps into it’s retracted position.

3. Install new chart on recording thermometer making sure chart is under the four corner tabs. Lower the stylus until stylus has made contact with the chart. Then close and secure door.

e. Open Saginomiya recording thermometer door (if so

equipped) and do the following:

1. Check Cha rt drive battery condition. (Refer to section 6.20.)

2. Lift stylus (pen) by pushing in the stylus lifter and rotating the lifter clockwise (raising stylus at same time) until lifter locks in position.

6. Check defrost drain pans and drain lines for obstructions and clear if necessary. Wash with fresh water.

7. Check panels on refrigeration unit for loose bolts and condition of panels. Make sure T.I.R. devices are in place on access panels.

b. Check condenser coil for cleanliness. Wash with

fresh water. (Refer to section 6.17.)

c. Check position of fresh air makeup vent cover.

Operator must determine if fresh air makeup vent cover is to be opened or closed.

3. Install new chart on recording thermometer making sure cha rt is under the four corner tabs. Release stylus lifter by pushing down and rotating lifter counterclockwise until stylus lifter locks in position and stylus has made contact with chart. Then close door.

f. Open control box door. Check for loose electrical

connections or hardware.

g. Check color of moisture-liquid indicator.

h. Check oil level in compressor sight glass.

i. Start refrigeration unit. (Refer to section 4.3. )

SECTION 4

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4.2 STARTING AND STOPPING INSTRUCTIONS

CAUTION

Make sure that the unit circuit breaker(s) (CB-1 & CB-2) and the start-stop switch (ST) are in the OFF p osition before connecting to any electrical power source.

a. Starting the Unit

NOTE

The evaporator fans will always start in high speed regardless of set point and will switch to low speed afterapproximately 20 to 30 seconds if the set point is below --10_C(+14_F), or

-- 5 _C(+23_F) optionally.

1. Refer to Pre-Trip Inspection, section 4.1.

2. Check power source for proper voltage. Connect unit power plug and turn main power ON.

3. Turn refrigeration unit circuit breaker(s), and the start-stop switch to ON (position “1”).

4. Units equipped with the integrated DataCORDER:

Trip start is initiated by depressing the ALT. MODE key and selecting Code dc30, then depressing the ENTER key for five seconds.

5. Refer to section 4.3 after unit is running.

b. Stopping the Unit

Turn the start-stop switch to position “0” (OFF position).

4.3 AFTER STARTING INSPECTION

a. Check rotation of condenser and evaporator fans.

b. Check compressor oil level. (Referto section 6.10.)

c. Run unit at least five minutes to stabilize. Start

controller Pre-Trip diagnostics. (Refer to section 3.2.)

4.4 UNIT OPERATION

4.4.1 Crankcase Heater

When the crankcase heater is installed, it will be operational whenever the compressor is off and there is power to the unit. The heater is connected to a set of normally closed auxiliary contacts on the compressor contactor (CH).

4.4.2 Probe Check Initiation

Wheneverthe unit is in normal control mode, that is, not in pre-trip, defrost or shutdown modes and there are NO active probe alarms, and alarm codes AL11 and AL12 are inactive (for units so equipped), the following probe diagnostic functions are performed by the controller.

The following is based on current ML2i operational software l ogic, version 5103. Older versions of software will have differences.

a. Probe Diagnostic Logic

If the unit is configured forstandard (Std) “Probe Check Logic,” the criteria used for comparison between the primary and secondary control probes is:

S 1_ C (1.8_F) for perishable set points, above

-- 1 0 _C(+14_ F), or --5_C(+23_F) optionally.

S 2_ C (3.6_F) for frozen set points, below

above range.

S If 25 or more of 30 readings taken within a 30

minute period are out-of-range per the above criteria, then a defrost* is initiated and a probe check is performed.

b. Special

If the unit is configured for special (SPEC) “Probe Check Logic,” the above criteria is identical except for the diagnostic readings which are:

S If 25 or more of 30 readings taken within a

30 minute period OR any 10 consecutive readings at any time are out-of-range per the above criteria, then a defrost* is initiated and a probe check is performed.

* The only time defrost will not be initiated is if the defrost termination sensor (DTS) is greater than

25.56_C(78_F).

The 30 minute timer will be reset for each of the following conditions:

S At every power up.

S At the end of every defrost.

S After every diagnostic check that does not fall

outside of the limits as described under “standard or special” as outlined above.

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If AL55 is active,meaning that the DataCORDER (DC) functionality is no longer active (DC configuration variable off), the Controller will act as a four probe configured system during probe checks. The only differences will be that the Controller Function Codes Cd38 and Cd39 will become enabled thus allowing access to the secondary probe readings since the DC functions, codes and alarms have become deactivated. Controller alarms AL70 and AL71 will replace DC alarms AL70 and AL71 respectively for the secondary probes.

4.4.3 Cooling -- Controller Set BELOW --10_C (+14_F), or --5_C(+23_F) optionally

NOTES

S The suction solenoid valve (SSV) will be

open to increase the refrigerant flow rate and cooling capacity unless SSV override is activated.

S The suction modulation valve (SMV) is

100% open.

S The evaporator motors run in l ow speed.

If the unit is configured forstandard (Std) “Probe Check Logic,” a probe check will be run as a part of every normal defrost.

If the unit is configured for special (SPEC) “Probe Check Logic,” a probe check will not be run as a part of a normal defrost, but only as a part of a defrost initiated due to a diagnostic reading outside of the limits as outlined above under “special.”

c. Probe Check

During a defrost cycle that includes a probe check, after the heaters t urn off, the evaporator motors will be energizedfor an additional eight minutes after which all the primary/secondary probes will be compared to a set of predetermined limits.

The defrost indicator will remain on throughout this period.

Any probe(s) determined to be outside the limits will cause the appropriate alarm code(s) to be displayed to identify which probe(s) needs to be replaced.

S The compressor runs in high speed.

S Refer to Figure 3-7 for a description of the

dual speed compressor change logic.

When the return air temperature decreases to 0.2_C (0.4_F) below set point, relays TD and TN de-energize. This results in de-energizing the compressor and condenser fan motor. Also, the cool light is de-energized. The evaporator fan motors continue to run to circulate air throughout the container.

When the return air temperature increases to 0.2_C (0.4_F) above set point, and providing a sufficient off-time period has elapsed, relays TD and TN energize to restart the compressorand condenser fan motor. Also at this time, the cool light is illuminated.

4.4.4 Controller Set ABOVE --10_C(+14_F), or

-- 5 _C(+23_F) optionally

NOTE

Evaporator fan motors will run in high speed. (Contactor EF energized.)

a. Cooling in High Speed with Two-Speed

Compressor (See Figure 4-1.)

The limits used during a probe check are tighter than those used for the diagnostic criteriato ensure accurate detection of a faulty probe(s).

NOTES

S Be aware that probe check and probe

diagnostics are two separate functions. The function of the diagnostic logic is to alert the microprocessor of a discrepancy with the control probe(s). The function of the probe check is to determine what probe(s) is in error.

S The P5 Pre-Trip test must be run to inactivate

alarms (refer to section 3.2.1).

NOTE

The condenser fan will cycle off if the condenser pressure is below 130 psig. If the condenser pressure rises above 200 psig, the condenser fan will cycle on.

With supply air temperature decreasing, and if the supply air is above set point, t he unit will be cooling with the condenser fan motor, compressor motor and evaporator fan motors energized. Also, at this time, the cool light is illuminated.

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Page 79

When the air temperature decreases to a predetermined tolerance above set point, relay TI energizes and the in-range light is illuminated. (Refer to section 3.1.4, Code 30.)

If the air temperature continues to fall, modulating cooling starts at approximately 2.5_C (4.5_F ) above set point. The modulating valvewill have a variablecurrent up to 1.30 amps at full modulation.

During this cooling mode, a running sum of the temperature differential (supply air temperature minus the set point) is kept. When the supply air falls belowset point, the differential is negative. The longer supply air remains below set point, the greater the differential in the running sum.

When the supply air temperature decreases to 0. 2_C below set point and the running sum is less than --250 degrees C-seconds, relays TN and TC de-energize

shutting off the condenser fan and compressor motors. Also, the cool light is de-energized.

The evaporator fan motors continue to run to circulate air throughout the container. The in-range light remains illuminated aslong as the supplyair is within atolerance of set point, and the 15 minute override is met.

If the unit is in the holding mode (neither heating nor cooling) and the supply air temperature increases to

0.2_C (0.4_F ) above set point, and providing a six

minute off time has elapsed, relay TC energizes to restart the compressor. Also, at this time, the condenser fan motor starts and the cool light is illuminated.

During this mode the dual speed compressor can be either running in high or low speed depending on the box load. Refer to Figure 3-6 for a description of the speed change logic.

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CONTROL TRANSFORMER

= 18 V olt Energized Circuit = 24 Volt Energized Circuit = De-energized Circuit

Figure 4-1. Cooling in High Speed with Two-Speed Compressor

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SECTION 4

Page 81

b. Cooling in Low Speed with Two-Speed

Compressor (See Figure 4-2.)

NOTE

Evaporator fan motors will run in high speed. (Contactor EF energized)

NOTE

The condenser fan will cycle off if the condenser pressure is below 130 psig. If the condenser pressure goes above 200 psig, the condenser fan will cycle on.

When the air temperature decreases to a predetermined tolerance above set point, relay TI energizes and the in-range light is illuminated. (Refer to section 3.1.4, Code 30.)

If the air temperature continues to fall, modulating cooling starts at approximately 2.5_C (4.5_F ) above set

point. The modulating valvewill have a variablecurrent up to 1.30 amps at full modulation.

During this cooling mode, a running sum of the temperature differential (supply air temperature -- set point) is kept. When the supply air falls below set point, the differential is negative. The longer supply air remains below set point, the greater the negative differential in the running sum.

When the supply air temperature decreases to 0. 2_C below set point and the running sum is less than --250 degrees C-seconds, relays TN and TC de-energize shutting off the condenser fan and compressor motors. Also, the cool light is de-energized.

If the unit is in the holding mode (neither heating nor cooling) and the supply air temperature increases to

0.2_C (0.4_F ) above set point, and providing a six

minute off time has elapsed, relay TC energizes to restart the compressor. Also, at this time, the condenser fan motor starts and the cool light is illuminated.

During this mode the two-speed compressor can be either running in high or low speed depending on the box load, ambient temperature, time since power-on, AC line voltage and the position of the SSV.

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CONTROL TRANSFORMER

= 18 Volt Energized Circuit

Figure 4-2. Cooling in Low Speed with Two-Speed Compressor

SECTION 4

= 24 Volt Energized Circuit = De-energized Circuit

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c. Cooling with Single-Speed Compressor

(See Figure 4-3.)

NOTE

Evaporator fan motors will run in high speed. (Contactor EF energized)

NOTE

The condenser fan will cycle off if the condenser pressure is below 130 psig. If the condenser pressure goes above 200 psig, the condenser fan will cycle on.

When the air temperature decreases to a predetermined tolerance above set point, relay TI energizes and the in-range light is illuminated. (Refer to section 3.1.4, Code 30.)

If the unit is in the holding mode (neither heating nor cooling) and the supply air temperature increases to

0.2_C (0.4_F ) above set point, and providing a six

minute off time has elapsed, relay TC energizes to restart the compressor. Also, at this time, the condenser fan motor starts and the cool light is illuminated.

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CONTROL TRANSFORMER

= 18 Volt Energized Circuit

Figure 4-3. Cooling with Single-Speed Compressor

SECTION 4

= 24 Volt Energized Circuit = De-energized Circuit

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4.4.5 Heating (See Figure 4-4.)

The unit will heat only when the controller set point is above --10_C(+14_F), or --5_C(+23_F) optionally, as relay TH is electronically locked out to prevent heating when the controller set point is below -- 1 0 _C(+14_F), or --5_C(+23_F) optiona lly.

If the air temperature decreases 0.5_C (0.9_F) below controller set point, TH closes and the system enters the heating modewhich is designed to raise the containerair temperature. When TH closes, power flows through TH contacts and the heattermination thermostat to energize the heat contactor (HR). This in turn energizes the heaters and heat light. The evaporator fans continue to run to circulate air throughout the container.

As the supply air decreases to the in-range tolerance below set point, relay TI and the in-range light de-energize (after a 15 minute time delay) and will remain de-energized until the supply air increases to a tolerance below set point. (Refer to section 3.1.4, Code

30.)

When the temperature rises to 0.2_C (0.4_F) below set point, TH opens (heating off) and the system again enters the holding zone. The compressor and condenser fan motor are not running as contactors CH and CF remain de-energized. The evaporator fans continue to run to circulate air throughout the container.

A safety heater termination thermostat (HTT) attached to an evaporator coil support, set to open at 54.5_C (130_F), will open the heating circuit if overheating occurs.

4-10T-268-07

Page 86

CONTROL TRANSFORMER

= 18 V olt Energized Circuit = 24 Volt Energized Circuit = De-energized Circuit

Figure 4-4. Heating Mode

4-11 T-268-07

SECTION 4

Page 87

4.4.6 Defrost

Refer to section 3. 1.4 (Code 27) for description of the defrost interval selector and automatic defrost initiation.

The defrost cycle (see Figure 4-5) consists of two distinct sub-cycles. The first sub-cycle is the de-ice cycle, the second is a probe check cycle.

Defrost may takeplace any time the DTS allows, and no shutdown alarms are active. With these conditions satisfied, defrost is initiated when one of the following conditions becomes true:

a. The manual defrost switch (MDS) is closed by the

user. Refer to Figure 2-7 or Figure 2-8 for location. The MDS is ignored during Pre-Trip.

b. The defrost interval timer reaches or exceeds the

defrost interval selected and set by the user.

c. During Pre-Trip (auto, not manual) defrost can

occur during the advanced Pre-Trip tests P-8 and P-10. Defrost is forced during advanced Pre-Trip test P-9.

d. When the probe diagnostic logic determines that a

probe check is necessary based on the temperature values currently reported by the supply and return probes.

e. When bulb mode is active, and the defrost

terminationsensor (DTS) is between0_C and 10_C (32_F and 50_F).

When the defrost mode is initiated, the controller relay contacts (TH) close to supply power to the heat contactor (HR) and in turn, energize the defrost heaters. The defrost light is illuminated.

Relay TC and TD open to de-energize the compressor contactor and cool light. Also relay TN opens to de-energize the condenser fan contactor (CF).

Relay TE and TV open to stop the evaporator fan motors.

The in-range light remains illuminated during defrost.

When the coil tube sheet temperature reaches 25.6_C (78_F), [4_C and 25.6_C (39.2_F and 78_F) if configured for and operating in bulb mode], the defrost termination sensor (DTS) causes the controller to end the defrost cycle and the unit returns to its normal function. Under certaincircumstances, defrost may also be forced to terminate through special communication commands.

Upon completion of the de-ice phase of defrost, the controller will perform a probe check cycle. The purpose ofthe probe check cycle is to perform aperiodic check of the controller sensors to detect malfunctions or drift in the sensed temperature that is t oo small to be detected by the normal sensor out of range tests. The system will run for eight minutes in this condition. At the end of the eight minutes, the primary supply, primary return and DataCORDER sensor temperatures will be compared. The controller probe alarms will be set or cleared based on the conditions seen.

The 54.5_C (130_F) heat termination thermostat(HTT) will open the circuit if the defrost mode does not terminate at 25.6_C(78_F). If termination does not occur within 2.0 hours, the controller will terminate defrost. An alarm will be given of a possible DTS failure.

When the return air falls to 7_C(45_F), the controller checks to ensure t he defrost termination sensor (DTS) has dropped to 10_C or below. If it has not, a DTS failure alarm is given and the defrost mode is operated by the return temperature sensor (RTS).

Snap Freeze Option:

NOTE

Controller configuration variable 33 must be set to SnAP to activate this option, refer to Table 3-1.

If the probe check portion of defrost is required (depending on the configuration of probe check), snap freeze will run after the probe check cycle. Otherwise, snap freeze will run immediately following the de-ice portion of defrost.

The snap freeze cycle consists of running the compressor without the evaporator fans running for a period offour minutes with both suctionsolenoid (SSV) and suction modulation (SMV) valves fully open.

If current limiting activates (see section 3.1.4, Cd32) during snap freeze, the state of the SSV and SMV valves may change. When the snap freeze cycle is completed, defrost is formally terminated.

4.4.7 Arctic

With arctic mode enabled, if the ambient is colder than

--10.0_C there is a 30 minute time delay at startup for

any of the components in t he system, except for the controller and the compressor crankcase heater (CCH), which should be active at t his point. In arctic mode, the CCH is energized for 30 minutes to warm the oil in the compressor, and boil off any liquid refrigerant that may be present in the crankcase.

4-12T-268-07

Page 88

If Pre-Tripis initiated during the 30 minute time period, Pre-Tripwill be allowed to runnormally. Once Pre-Trip is over, the controller will revert to its normal control mode logic.

If ambient is warmer than --10.0_C, the system will run

its normal startup logic.

Arctic mode is configurable by using the configuration variable #29, refer to Table 3-1.

CONTROL TRANSFORMER

= 18 V olt Energized Circuit = 24 V o lt Energized Circuit = De-energized Circuit

Figure 4-5. Defrost

4-13 T-268-07

SECTION 4

Page 89

Table 4-1. Electrical Control Positions -- BELOW --10_C(+14_F), or --5_C(+23_F) optionally

CONTROL CIRCUIT COOLING

Holding Zone

**Dehumidification

HEATING DEFROST

Single-Speed Compressor:

Compressor Contactor (C)

Energized De-energized ** **

De-energized

Two-Speed Compressor:

Compressor Contactor (CH)

Compressor Contactor (CS)

Compressor Contactor (CL)

Condenser Fan Contactor (CF)

High Speed Evaporator Contactor (EF)

Low Speed Evaporator Contactor (ES)

Energized De-energized ** **

De-energized De-energized ** **

Energized De-energized ** ** De-energized

Refer to

section

3.1.7.a.2 Refer to

section

3.1.7.a.2

De-energized De-energized

Energized Energized

Refer to section

3.1.7.a.2

Refer to section

3.1.7.a.2

De-energized

Defrost Relay (TF) De-energized De-energized ** ** Energized

Heater Relay (HR) De-energized De-energized ** ** Energized

INDICATING LIGHTS

Cool ON OFF ** ** OFF

Defrost OFF OFF ** ** ON

In-Range On -- If In-Range (Refer to paragraph 3.1.4, Code 30)

Heat OFF OFF ** ** ON

POWER CIRCUIT

Compressor Energized De-energized ** ** De-energized

Condenser Fan Motor Energized De-energized ** ** De-energized

Heaters De-energized De-energized ** ** Energized

Evaporator Fan Motors Energized Energized ** ** De-energized

** Dehumidification and heating modes do not operate atset points below --10_C(14_F), or --5_C(23_F) optionally

-- May be energized in defrost if snap freeze portion of defrost is run.

-- May be energized in defrost if probe check portion of defrost is run.

4-14T-268-07

Page 90

Table 4-2. Electrical Control Positions -- ABOVE --10_C(+14_F), or --5_C(+23_F) optionally

CONTROL CIRCUIT COOLING

Single-Speed Compressor:

Compressor Contactor (C)

Energized De-energized ** **

Two-Speed Compressor in high speed mode:

Compressor Contactor (CH)

Compressor Contactor (CS)

Compressor Contactor (CL)

Energized De-energized ** **

De-energized De-energized ** **

Two-Speed Compressor in low speed mode:

Compressor Contactor (CH)

Compressor Contactor (CS)

Compressor Contactor (CL)

Condenser Fan Contactor (CF)

High Speed Evaporator Contactor (EF)

De-energized De-energized ** **

Energized De-energized ** **

Energized De-energized Energized De-energized De-energized

Energized Energized

Holding Zone

* Dehumidification

Refer to section

3.1.7.a.2

HEATING DEFROST

De-energized

Refer to

section

3.1.7.a.2

De-energized

Low Speed Evaporator Contactor (ES)

De-energized De-energized

Refer to section

3.1.7.a.2

Refer to

section

3.1.7.a.2

De-energized

Defrost Relay (TF) De-energized De-energized De-energized De-energized Energized

Heater Relay (HR) De-energized De-energized Energized Energized Energized

INDICATING LIGHTS

Cool ON OFF ON OFF OFF

Defrost OFF OFF OFF OFF ON

In-Range On -- If In-Range (Refer to paragraph 3.1.4, Code 30)

Heat OFF OFF ON ON ON

POWER CIRCUIT

Compressor Energized De-energized Energized De-energized De-energized

Condenser Fan Motor Energized De-energized Energized De-energized De-energized

Heaters De-energized De-energized Energized Energized Energized

Evaporator Fan Motors Energized Energized Energized Energized De-energized

* Unit with optional Humidity sensor ** Dehumidification and heating modes do not operate atset points below --10_C(14_F), or --5_C(23_F) optionally

-- May be energized in defrost if snap freeze portion of defrost is run.

-- May be energized in defrost if probe check portion of defrost is run.

SECTION 4

4-15 T-268-07

Page 91

SECTION 5

TROUBLESHOOTING

CONDITION POSSIBLE CAUSE

5.1 UNIT WILL NOT START OR STARTS THEN STOPS

REMEDY/

REFERENCE

SECTION

External power source OFF

No power to unit

Loss of control power Loss of control power in respective branch of control circuit only

Loss of control power in respective branch of control circuit only

Compressor hums, but does not start

Compressor will occasionally de-energize for 15 seconds

5.2 UNIT RUNS BUT HAS INSUFFICIENT COOLING

Compressor Compressor valves defective 6.7

Refrigeration System

Start-Stop switch OFF or defective Circuit breaker tripped or OFF Modular transformer not connected

Circuit breaker OFF or defective Control transformer (TR) defective Fuse (F3) blown Start-Stop switch OFF or defective

Evaporator fan motor internal protector open Condenser fan motor internal protector open Compressor internal protector open High pressure switch open Heat termination thermostat (HTT) open

Low line voltage Single phasing Shorted or grounded motor windings Compressor seized Contactor (SC) shorting (in high speed mode of two-speed compressor only)

Compressor speed change (On units with two-speed compressor)

Abnormal pressures Temperature controller malfunction Evaporator fan or motor defective Suction modulation valve malfunction Suction solenoid valve malfunction Condenser Pressure Transducer (CPT) defective Shortage of refrigerant

Turn on Check Check

6.22 Check

Replace Check Check

6.15

6.18

6.7

5.7 Replace

Check Check

6.7

6.7 Check

Normal

5.7

5.9

6.15

6.25

2.10/6.24 Check

6.6

5.3 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING

Container

Refrigeration System

Hot load Defective box insulation or air leak

Shortage of refrigerant Evaporator coil covered with ice Evaporator coil plugged with debris Evaporator fan(s) rotating backwards Defective evaporator fan motor/capacitor Air bypass around evaporator coil Controller set too low Compressor service valves or liquid line shutoff valve partially closed Dirty condenser Compressor worn Current limit (Code 32) set to wrong value Suction modulation valve (SMV) malfunction

5-1 T-268-07

Normal Repair

6.4/6.6

5.6

6.13

6.15/6.16

6.15/6.16 Check Reset Open valves completely

6.17

6.7

3.1.4

6.25

SECTION 5

Page 92

CONDITION

POSSIBLE CAUSE

5.4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING

REMEDY/

REFERENCE

SECTION

No power to unit

No control power

Unit will not heat or has insufficient heat

Start-Stop switch OFF or defective Circuit breaker OFF or defective External power source OFF

Circuit breaker or fuse defective Transformer defective (TR) Evaporator fan internal motor protector open Heat relay defective Heater termination switch open

Heater(s) defective Heater contactor or coil defective Evaporator fan motor(s) defective or rotating backwards Evaporator fan motor contactor defective Temperature controller malfunction Defective wiring Loose terminal connections Low line voltage

Check Check Turn on

Replace Replace

6.15 Check

6.13

6.14 Replace

6.15/6.16 Replace

5.9 Replace Tighten

2.4

5.5 UNIT WILL NOT TERMINATE HEATING

Unit fails to stop heating

Temperature controller improperly set Temperature controller malfunction Heater termination switch remains closed along with the

Reset

5.9

6.13

heat relay

5.6 UNIT WILL NOT DEFROST PROPERLY

Will not initiate defrost automatically

Defrost timer malfunction Loose terminal connections Defective wiring Defrost termination sensor defective or heat termination

3.1.4 Tighten Replace Replace

switch open

Will not initiate defrost manually

Heater contactor or coil defective Manual defrost switch defective

Defrost termination sensor open

Replace Replace

4.4.6

Initiates but relay (DR) drops out Low line voltage 2.4

Initiates but does not defrost

Heater contactor or coil defective Heater(s) burned out

Replace

6.14

Frequent defrost Wet load Normal

5-2T-268-07

Page 93

CONDITION

5.7 ABNORMAL PRESSURES (COOLING)

POSSIBLE CAUSE

REMEDY/

REFERENCE

SECTION

Condenser coil dirty Condenser fan rotating backwards Condenser fan inoperative

High discharge pressure

Low suction pressure

Suction and discharge pressures tend to equalize when unit is operating

5.8 ABNORMAL NOISE OR VIBRATIONS

Compressor

Condenser or Evaporator Fan

Refrigerant overcharge or noncondensibles Discharge pressure regulator valve defective Discharge service valve partially closed Perishable set point Suction modulation valve (SMV) malfunction

Suction service valve partially closed Filter-drier partially plugged Low refrigerant charge Expansion valve defective No evaporator air flow or restricted air flow Excessive frost on evaporator coil Evaporator fan(s) rotating backwards Discharge pressure regulator valve defective Suction modulation valve (SMV) malfunction

Heat exchanger defective Compressor valves defective Compressor cycling/stopped

Loose mounting bolts Worn bearings Worn or broken valves Liquid slugging Insufficient oil

Bent, loose or striking venturi Worn motor bearings Bent motor shaft

6.17

6.18

6.6 Replace Open Normal

6.25 Open

6.11

6.4/6.6

6.26

5.10

5.6

6.14/6.16 Replace

6.25 Replace

6.8 Check

Tighten

6.7

5.11

6.10 Check

6.15/6.18

5.9 TEMPERATURE CONTROLLER MALFUNCTION

Defective Sensor

Will not control

5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW

Evaporator coil blocked

No or partial evaporator air flow

Defective wiring Fuse (F1, F2) blown Suction modulation valve (SMV) circuit malfunction

Frost on coil Dirty coil

Evaporator fan motor internal protector open Evaporator fan motor(s) defective Evaporator fan(s) loose or defective Evaporator fan contactor defective

6.23 Check Replace

6.25

5.6

6.13

6.15

6.15/6.16

6.15 Replace

SECTION 5

5-3 T-268-07

Page 94

CONDITION

5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION

POSSIBLE CAUSE

REMEDY/

REFERENCE

SECTION

Low refrigerant charge External equalizer line plugged Wax, oil or dirt plugging valve or orifice Ice formation at

Low suction pressure with high superheat

High suction pressure with low superheat

Liquid slugging in compressor

Fluctuating suction pressure

5.12 POWER AUTOTRANSFORMER MALFUNCTION

Unit will not start

5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH

High discharge pressure

Condenser fan starts and stops

valve seat Superheat too high Power assembly failure Loss of element/bulb charge Broken capillary Foreign material in valve

Superheat setting too low External equalizer line plugged Ice holding valve open Foreign material in valve

Pin and seat of expansion valve eroded or held open by foreign material

Improper bulb location or installation Low superheat setting

Circuit breaker (CB-1 or CB-2) tripped Power transformer defective Power source not turned ON 460 VAC power plug is not inserted into the receptacle

Dirty coil Noncondensibles

Water pressure switch malfunction Water supply interruption

6.4/6.6 Open

6.26

6.4/6.6

6.26.c

6.26

6.26.c Open

6.4/6.5 6.26

6.26

6.26.c

Check

6.22 Check

2.4

6.28

Check

5-4T-268-07

Page 95

SECTION 6

SERVICE

NOTE

To avoid damageto the earth’s ozonelayer, use a refrigerantrecovery system wheneverremoving refrigerant. When working with refrigerants you must comply with all local government environmental laws. In the U.S.A., refer to EPA section 608.

6.1 MANIFOLD GAUGE SET

The manifoldgauge set can be usedto determine system operating pressure, add a refrigerant charge, and to equalize or evacuate the system.

Figure 6-1 shows hand valves, gauges and refrigerant openings. When t he low pressure hand valve is frontseated (turned all the way in), the low (evaporator) pressure can be checked. When the high pressure hand valve is frontseated, high (condensing) pressure can be checked. When both valves are open (turned counter-clockwise all the way out), high pressure vapor will flow into the low side. When the low pressure valve is open, the system can be charged. Oil can also be added to the system.

Only a R-134a manifold gauge set with self-sealing hoses, as shown in Figure 6-2 (CTD P/N 07-00294-00, which includes items 1 through 6) can be used when working on the models covered within this manual.

Low Pressure Gauge High Pressure Gaug

a. Connecting the Manifold Gauge Set

(See Figure 6-2)

1. Remove service valve stem caps and check both service valves to make sure they are backseated (turned counter-clockwise all the way out). Remove service port caps.

2. Connect the high side field service coupling (backseated) to the discharge service valve port (or the manual liquid line valve port, whichever is applicable).

3. Turn the high side field service coupling (red knob) clockwise, which will open the high side of the system to the gauge set.

4. Connect the low side field service coupling to the suction service valve port.

5. Turn the low side field service coupling (blue knob) clockwise, which will open t he low side of the system to the gauge set.

6. To read system pressures: slightly midseat the discharge and suction service valves, and frontseat both manifold gauge set hand valves.

Opened

ABC

(BackseatedHandValve)

Closed

(Frontseated Hand Valve)

A. Connection to Low Side of System B. Connection to High Side of System C. Connection to Either:

Refrigerant Cylinder or Oil Container

Figure 6-1. Manifold Gauge Set

NOTE

If amanifold gauge set isnew or was exposed to the atmosphere due to repair, it will need to be evacuated to remove contaminants and air as follows:

S Midseat both hand valves.

S Connect the utility hose (yellow) to a vacuum

pump.

S Evacuate to 10 inches of vacuum.

S Charge with R-134a to a slightly positive

pressure of 0.1 kg/cm@ (1.0 psig). The gauge set is now ready for use.

SECTION 6

6-1 T-268-07

Page 96

CAUTION

b. Removing the Manifold Gauge Set

To prevent trapping liquid refrigerant in the service valve after charging, perform the following steps while the compressor is ON and before disconnecting the manifold gauge set:

S Backseat applicable discharge or manual

liquid line valve.

S Midseat manifold gauge set hand valves.

S Allow the gauge set to pull down to suction

pressure.

1. While the compressor is still ON, backseat the discharge service valve.

2. Midseat both hand valves on the manifold gaugeset and allow the pressure in the manifold gauge set to be drawndown to suction pressure. This enablesthe liquid that condensed in the high side hose to be returned to the system.

3. Backseat the suction service valve. Backseat both field service couplings, and remove the couplings from the service ports.

4. Install both service valve stem caps and service port caps (finger-tight only).

6-2T-268-07

Page 97

To Suction Service

Port

To D is cha rg e Se rv ice o r

Manual Liquid Line

Ports

Blue Hose

Blue Knob

1. Manifold Gauge Set

2. Hose Fitting (0.500-16 Acme)

3. Refrigeration or Evacuation Hoses (SAE J2196/R-134a)

4 Hose Fitting w/O-ring

(M14 x 1.5)

5. High Side Field Service

Figure 6-2. R-134a Manifold Gauge Set Connection

Red Hose

Yellow Hose

6. Low Side Field Service

7. High Side Service Port

8. Low Side Service Port

Coupling

(SAE J639 Male)

Red Knob

SECTION 6

6-3 T-268-07

Page 98

6.2 SUCTION AND DISCHARGE SERVICE VALVES

The suction and discharge service valves used on the compressor are equipped with mating flanges for connection to flanges on the compressor. These valves are provided with a double seat and a gauge connection which enable servicing of the compressor and refrigerant lines.

Turning the valve stem clockwise (all the way forward) will frontseat the valve to close off the suction or discharge line and open the gauge connection to the compressor. See Figure 6-3. Turning the valve stem counterclockwise (all the way out) will backseat the valve to open the suction or discharge line to the compressor and close off the gauge connection.

With the valve stem midway between frontseated and backseated positions, the suction or discharge line is open to both the compressor and the gauge connection.

For example, when connecting a manifold gauge to measure suction or discharge pressure, the valve stem is fully backseated. Then, to measure suction or discharge pressure, crack open the valves 1/4 to 1/2 turn.

Gauge Connection

To S u ct io n o r Discharge Line

Compressor

Valve Frontseated (clockwise)

Figure 6-3. Suction or Discharge Service Valve

6.3 PUMPING THE UNIT DOWN

(counterclockwise)

Backseated

Valve Cap

Valve Stem

Valve

To service the filter-drier, moisture-liquid indicator, expansion valve, suction modulation valve, suction solenoid valve or evaporator coil, pump most of the refrigerant into the condenser coil and receiver as follows:

a. Backseat the suction and discharge valves (turn

counterclockwise) to close off gauge connections and attach manifold gauges to valves. Refertosection6.1.a.

b. Allow the compressor to run 10 to 15 minutes

before frontseating the liquid line valve. Then close (front seat) the liquid line valve by turning

clockwise. Start the unit and run in a cooling mode. Placestart-stop switch in the OFF position whenthe unit reaches a positive pressure of 0.1 kg/cm@ (1.0 psig).

c. Frontseat (close) the suction service valve. The

refrigerant will be trapped between the compressor suction service valve and the liquid line valve.

d. Before opening up any part of the system, a slight

positive pressure should be indicated on the pressure gauge. If a vacuum is indicated, emit refrigerant by cracking the liquid line valve momentarily to build up a slight positive pressure.

e. When opening up the refrigerant system, certain

parts may frost. Allow the part to warm to ambient temperature before dismantling. This avoids internal condensation which puts moisture in the system.

f. After repairs have been made, be sure to perform a

refrigerant leak check (section 6.4), and evacuate and dehydrate the system (section 6.5).

g. Check refrigerant charge (refer to section 6.6).

6.4 REFRIGERANT LEAK CHECKING

WARNING

Never mix refrigerants with 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.

a. The recommended procedure for finding leaks in a

system is with a R-134a electronic leak detector. Testing joints with soapsuds is satisfactory only for locating large leaks.

b. If the system is without refrigerant, charge the

system with refrigerant to build up pressure between 2.1 to 3.5 kg/cm@ (30 to 50 psig). Remove refrigerant cylinder and leak-check all connections.

NOTE

It must be emphasized that only the correct refrigerant cylinder be connected to pressurize the system. Any other gas or vapor will contaminate the system, which will require additional purging and evacuation of the system.

c. Remove refrigerant using a refrigerant recovery

system and repair any leaks.

6-4T-268-07

Page 99

d. Evacuate and dehydrate the unit. (Refer to section

6.5.)

e. Charge unit per section 6.6.

6.5 EVACUATION AND DEHYDRATION

6.5.1 General

Moisture is the deadly enemy of refrigeration systems. The presence of moisture in a refrigeration system can have many undesirable effects. The most common are copper plating, acid sludge formation, “freezing-up” of metering devices by free water, and formation of acids, resulting in metal corrosion.

6.5.2 Preparation

a. Evacuate and dehydrate only after pressure leak

test. (Refer to section 6.4.)

b. Essential tools to properly evacuate and dehydrate

any system include a vacuum pump (8 m

/hr = 5 cfm volume displacement, P/N 07-00176-01) and electronic vacuum gauge.

c. If possible, keep the ambient temperature above

15.6_C(60_F) to speed evaporation of moisture. If the ambient temperature is lower than 15.6_C (60_F), ice might form before moisture removal is complete. Heat lamps or alternate sources of heat may be used to raise the system temperature.

d. Midseat the refrigerant system service valves.

e. Open the vacuum pump and electronic vacuum

gauge valves, if they are not already open. Start the vacuum pump. Evacuate unit until the electronic vacuum gauge indicates 2000 microns. Close the electronic vacuum gaugeand vacuum pump valves. Shut off the vacuum pump. Wait a few minutes to be sure the vacuum holds.

f. Break the vacuum with clean dry refrigerant gas.

Use refrigerant specified for the unit. Raise system pressure to approximately 2 psig, monitoring it with the compound gauge.

g. Remove refrigerant using a refrigerant recovery

system.

h. Repeat steps (e) through (g) one time.

i. Remove the copper tubing and change the

filter-drier. Evacuate unit to 500 microns. Close the electronic vacuum gaugeand vacuum pump valves. Shut off the vacuum pump. Wait five minutes to see if vacuum holds. This procedurechecks for residual moisture and/or leaks.

j. With a vacuum still in the unit, the refrigerant

charge may be drawn into the system from a refrigerant container on weight scales. The correct amount of refrigerant may be added by observing the scales. (Refer to section 6.6)

d. Replace the filter-drier with a section of copper

tubing with the appropriate fittings. This action will help speed the evacuation procedure.

6.5.3 Procedure

a. Remove all refrigerant using a refrigerant recovery

system.

b. The recommended method to evacuate and

dehydrate the system is to connect three evacuation hoses, as shown in Figure 6-4, to t he vacuum pump and refrigeration unit. DO NOT use standard service hoses, as they are not suited for evacuation purposes. Also as shown, connect a evacuation manifold, with evacuation hoses only, to the vacuum pump, electronic vacuum gauge, and refrigerant recovery system.

c. With the unit service valves closed (back seated)

and the vacuum pump and electronic vacuum gauge valves open, start the pump and draw a deep vacuum. Shut off the pump and check to see if the vacuum holds. This operation is to test the evacuation setup for leaks. Repair if necessary.

6.6 REFRIGERANT CHARGE

6.6.1 Checking the Refrigerant Charge

NOTE

To avoid damage to the earth’s ozone layer, use a refrigerant recovery system whenever removing refrigerant. When working with refrigerants you must comply with all local government environmental laws. In the U.S.A., refer to EPA section 608.

NOTES

S S et the controller set point to --25_C(--13_F)

to ensure that the suction modulation valve is fully open when checking operation of unit.

S The refrigerant level should only be checked

when the unit is running with the suction modulation valve fully open. The container temperature should be approximately 1.7_C (35_F) or --17.8_C(0_F).

a. Connect the gauge manifold to the compressor

discharge and suction service valves.

SECTION 6

6-5 T-268-07

Page 100

b. For Units equipped with receiver: partially block

the condensercoil inlet air,starting from the frontof the condenser coil. Increase the area blocked until the compressor discharge pressure is raised to approximately 12 kg/cm@ (175 psig). Refrigerant level on the receiver will normally be between the sight glasses. If the refrigerant level is not between these boundaries, refer to section 6.6.3.

c. For Units equipped with water-cooled condenser:

check charge only on air-cooled operation. Refrigerant level in the water-cooled operation will be normally above sight glass. Partially block the condenser coil inlet air starting from the front of the condenser coil. Increase the area blocked until the compressor discharge pressure is raised to approximately 12 kg/cm@ (175 psig). Refrigerant should appear at center line of sight glass on the water-cooled condenser. If the refrigerant level i s not betweenthese boundaries, referto section 6.6.3.

6-6T-268-07

Carrier 69NT40-511-1, 69NT40-511-199, 69NT40-521 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual