Carrier 69NT20-551-300 TO 399 Operation manual

Container Refrigeration
T--322 Rev --
OPERATION AND SERVICE
for
69NT20--551--300 TO 399
Container Refrigeration Units
r

OPERATION AND SERVICE MANUAL
CONTAINER REFRIGERATION UNIT
MODEL
69NT20-551--300 TO 399
Streamline Scroll

T-322
Safety-1
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 notices are presented in 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, should never go unattended. Always obtain first aid or medical attention 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, 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.
MAINTENANCE PRECAUTIONS
Beware of unannounced starting of the evaporator and condenser fans. Do not open the condenser fan grille or
evaporator access panels before turning power off, disconnecting and securing the power plug.
Be sure power is turned off before working on motors, controllers, solenoid valves and electrical control switches. Tag
circuit breaker and power supply to prevent accidental energizing of circuit.
Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires. Problems with
the system should be diagnosed, and any necessary repairs performed, by qualified service personnel.
When performing any arc welding on the unit or container, disconnect all wire harness connectors from the modules in
both control boxes. Do not remove wire harness from the modules unless you are grounded to the unit frame with a
static safe wrist strap.
In case of electrical fire, open circuit switch and extinguish with CO2(never use water).
UNIT LABEL IDENTIFICATION
To help identify the label hazards on the unit and explain the level of awareness each one carries, an explanation is
given with the appropriate consequences:
DANGER -- 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 severe 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.
SPECIFIC WARNING AND CAUTION STATEMENTS
The statements listed below are applicable to the refrigeration unit and appear elsewhere in this manual. These
recommended precautions must be understood and applied during operation and maintenance of the equipment
covered herein.

Safety-2
T-322
WARNING
Beware of unannounced starting of the evap-
orator and condenser fans. The unit may
cycle the fans and compressor unexpectedly
as control requirements dictate.
WARNING
Do not attempt to remove power plug(s) be-
fore turning OFF start-stop switch (ST), unit
circuit breaker(s) and external power source.
WARNING
Make sure the power plugs are clean and dry
before connecting to any power receptacle.
WARNING
Make sure that the unit circuit breaker(s)
(CB-1 & CB-2) and the START-STOP switch
(ST) are in the “O” (OFF) position before con-
necting to any electrical power source.
WARNING
Never use air for leak testing. It has been de-
termined that pressurized, mixtures of refrig-
erant and air can undergo combustion when
exposed to an ignition source.
WARNING
Make sure power to the unit is OFF and pow-
er plug disconnected before replacing the
compressor.
WARNING
Before disassembly of the compressor make
sure to relieve the internal pressure very
carefully by slightly loosening the couplings
to break the seal.
WARNING
Oakite No. 32 is an acid. Be sure that the acid
is slowly added to the water. DO NOT PUT
WATER INTO THE ACID -- this will cause spat-
tering and excessive heat.
WARNING
Always turn OFF the unit circuit breakers
(CB-1 & CB-2) and disconnect main power
supply before working on moving parts.
WARNING
Wear rubber gloves and wash the solution
from the skin immediately if accidental con-
tact occurs. Do not allow the solution to
splash onto concrete.
WARNING
Make sure power to the unit is OFF and
power plug disconnected before removing
capacitor(s).
WARNING
With power OFF discharge the capacitor be-
fore disconnecting the circuit wiring.
WARNING
Do not use a nitrogen cylinder without a pres-
sure regulator. Do not use oxygen in or near a
refrigeration system as an explosion may
occur.
WARNING
Do not open the condenser fan grille before
turning power OFF and disconnecting power
plug.
WARNING
The Unit Power Plug Must Be Disconnected
To Remove Power From Circuit Breaker Cb1
CAUTION
Do not remove wire harnesses from control-
ler modules unless you are grounded to the
unit frame with a static safe wrist strap.
CAUTION
Unplug all controller module wire harness
connectors before performing arc welding on
any part of the container.

T-322
Safety-3
CAUTION
When condenser 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 prop-
erly.
CAUTION
Pre-trip inspection should not be performed
with critical temperature cargoes in the con-
tainer.
CAUTION
When Pre-Trip key is pressed, economy, de-
humidification and bulb mode will be deacti-
vated. At the completion of Pre-Trip activity,
economy, dehumidification and bulb mode
must be reactivated.
CAUTION
When a failure occurs during automatic test-
ing the unit will suspend operation awaiting
operator intervention.
CAUTION
When Pre--Trip test Auto 2 runs to comple-
tion without being interrupted, the unit will
terminate pre-trip and display “Auto 2”
“end.” The unit will suspend operation until
the user depresses the ENTER key!
CAUTION
To prevent trapping liquid refrigerant in the
manifold gauge set be sure set is brought to
suction pressure before disconnecting.
CAUTION
The scroll compressor achieves low suction
pressure very quickly. Do not use the com-
pressor to evacuate the system below zero
psig. Never operate the compressor with the
suction or discharge service valves closed
(frontseated). Internal damage will result
from operating the compressor in a deep vac-
uum.
CAUTION
Use only Carrier Transicold approved Polyol
Ester Oil (POE) -- Mobil ST32 compressor oil
with R-134a. Buy in quantities of one quart or
smaller. When using this hygroscopic oil,
immediately reseal. Do not leave container of
oil open or contamination will occur.
CAUTION
Take necessary steps (place plywood over
coil or use sling on motor) to prevent motor
from falling into condenser coil.
CAUTION
DO NOT disassemble piston from NEW suc-
tion modulating valve powerhead assembly.
Doing so may result in damage to piston.
CAUTION
The unit must be OFF whenever a program-
ming card is inserted or removed from the
controller programming port.
CAUTION
Do not allow moisture to enter wire splice
area as this may affect the sensor resistance.
CAUTION
Do not allow the recorder stylus to snap back
down. The stylus arm base is spring loaded,
and damage may occur to the chart, or the
stylus force may be altered.
CAUTION
The inside mechanism of the recorder,
particularly the inside of the element housing
should never be oiled, however, control
mechanisms should be sprayed periodically
(every 60 days) with corrosion inhibiting CRC
3-36a or 6-66 or LPS no. 2.
CAUTION
Recorder element capillary tubing may be
bent, but never sharper than 1/2” radius;
extra care should be taken when bending
adjacent to welds. The bulb should never be
bent, as this will affect calibration.

iT--322
TABLE OF CONTENTS
PARAGRAPH NUMBER Page
GENERAL SAFETY NOTICES Safety-1............................................................
FIRST AID Safety-1.............................................................................
OPERATING PRECAUTIONS Safety-1............................................................
MAINTENANCE PRECAUTIONS Safety-1..........................................................
UNIT LABEL IDENTIFICATION Safety-1...........................................................
SPECIFIC WARNING AND CAUTION STATEMENTS Safety-1........................................
INTRODUCTION 1-1..............................................................................
1.1 INTRODUCTION 1-1.....................................................................
1.2 CONFIGURATION IDENTIFICATION 1-1...................................................
1.3 OPTION DESCRIPTIONS 1-1.............................................................
1.3.1 Battery 1-1...........................................................................
1.3.2 Dehumidification 1-1..................................................................
1.3.3 Control Box 1-1......................................................................
1.3.5 Pressure Readout 1-1.................................................................
1.3.6 Interrogator 1-1.......................................................................
1.3.7 Remote Monitoring 1-1................................................................
1.3.8 Communications 1-1..................................................................
1.3.9 Compressor 1-1......................................................................
1.3.10 Temperature Recorder 1-1.............................................................
1.3.11 Back Panels 1-1......................................................................
1.3.12 460 Volt Cable 1-2...................................................................
1.3.13 Cable Restraint 1-2...................................................................
1.3.14 Upper Air (Fresh Air Make Up) 1-2......................................................
1.3.15 Evaporator 1-2.......................................................................
1.3.16 Evaporator Fan Operation 1-2..........................................................
1.3.17 Labels 1-2...........................................................................
1.3.18 Plate Set 1-2.........................................................................
1.3.19 Controller 1-2........................................................................
1.3.20 Condenser Grille 1-2..................................................................
DESCRIPTION 2-1...............................................................................
2.1 GENERAL DESCRIPTION 2-1.............................................................
2.1.1 Refrigeration Unit -- Front Section 2-1...................................................
2.1.2 Fresh Air Makeup Vent 2-1.............................................................
2.1.3 Evaporator Section 2-2................................................................
2.1.4 Compressor Section 2-3...............................................................
2.1.5 Air Cooled Condenser Section 2-4......................................................
2.1.6 Control Box Section 2-5...............................................................
2.1.7 Communications Interface Module 2-5...................................................
2.2 REFRIGERATION SYSTEM DATA 2-6......................................................
2.3 ELECTRICAL DATA 2-7...................................................................
2.4 SAFETY AND PROTECTIVE DEVICES 2-8.................................................

ii
T--322
TABLE OF CONTENTS (cont)
2.5 REFRIGERATION CIRCUIT 2-9...........................................................
2.5.1 Standard Operation 2-9................................................................
2.5.2 Economized Operation 2-9..............................................................
2.5.3 Unloaded Operation 2-9.................................................................
MICROPROCESSOR 3-1..........................................................................
3.1 TEMPERATURE CONTROL MICROPROCESSOR SYSTEM 3-1..............................
3.1.1 Key Pad 3-2.........................................................................
3.1.2 Display Module 3-2...................................................................
3.1.3 Controller 3-3........................................................................
3.2 CONTROLLER SOFTWARE 3-3...........................................................
3.2.1 Configuration Software (Configuration Variables) 3-3......................................
3.2.2 Operational Software (Function codes) 3-3...............................................
3.3 MODES OF OPERATION 3-4.............................................................
3.3.1 Temperature Control -- Perishable Mode 3-4..............................................
3.3.2 Defrost Interval 3-4...................................................................
3.3.3 Failure Action 3-4.....................................................................
3.3.4 Generator Protection 3-4..............................................................
3.3.5 Compressor High Temperature, Low Pressure Protection. 3-4..............................
3.3.6 Perishable Mode -- Conventional 3-4....................................................
3.3.7 Perishable Mode -- Economy 3-4.......................................................
3.3.8 Perishable Mode -- Dehumidification 3-5.................................................
3.3.9 Perishable, Dehumidification -- Bulb Mode 3-5............................................
3.3.10 Temperature Control -- Frozen Mode 3-5.................................................
3.3.11 Frozen Mode -- Conventional 3-6.......................................................
3.3.12 Frozen Mode -- Economy 3-6...........................................................
3.4 CONTROLLER ALARMS 3-6..............................................................
3.5. UNIT PRE-TRIP DIAGNOSTICS 3-6.......................................................
3.6 DataCORDER 3-7........................................................................
3.6.1 Description 3-7.......................................................................
3.6.2 DataCORDER Software 3-7............................................................
3.6.3 Sensor Configuration (dCF02) 3-8......................................................
3.6.4 Logging Interval (dCF03) 3-10...........................................................
3.6.5 Thermistor Format (dCF04) 3-10.........................................................
3.6.6 Sampling Type (dCF05 & dCF06) 3-10...................................................
3.6.7 Alarm Configuration (dCF07 -- dCF10) 3-10...............................................
3.6.8 DataCORDER Power-Up 3-10...........................................................
3.6.9 Pre-Trip Data Recording 3-10...........................................................
3.6.10 DataCORDER Communications 3-10.....................................................
3.6.11 USDA Cold Treatment 3-11.............................................................
3.6.12 USDA Cold Treatment Procedure 3-11...................................................
3.6.13 DataCORDER Alarms 3-11.............................................................
3.6.14 ISO Trip Header 3-12..................................................................

iii T--322
TABLE OF CONTENTS (cont)
OPERATION 4-1.................................................................................
4.1 INSPECTION (Before Starting) 4-1.........................................................
4.2 CONNECT POWER 4-1..................................................................
4.2.1 Connection To 380/460 vac Power 4-1...................................................
4.3 ADJUST FRESH AIR MAKEUP VENT 4-1...................................................
4.3.1 Upper Fresh Air Makeup Vent 4-1.......................................................
4.4 CONNECT REMOTE MONITORING RECEPTACLE 4-2......................................
4.5 STARTING AND STOPPING INSTRUCTIONS 4-2...........................................
4.5.1 Starting the Unit 4-2...................................................................
4.5.2 Stopping the Unit 4-2..................................................................
4.6 START--UP INSPECTION 4-2.............................................................
4.6.1 Physical Inspection 4-2................................................................
4.6.2 Check Controller Function Codes 4-2....................................................
4.6.3 Start Temperature Recorder 4-2........................................................
4.6.4 Complete Inspection 4-2...............................................................
4.7 PRE-TRIP DIAGNOSIS 4-2...............................................................
4.8 OBSERVE UNIT OPERATION 4-3.........................................................
4.8.1 Probe Check 4-3.....................................................................
4.9 SEQUENCE OF OPERATION 4-4............................................................
4.9.1 Sequence Of operation -- Compressor Phase Sequence 4-5.................................
4.9.2 Sequence Of Operation -- Perishable Mode Cooling 4-5.....................................
4.9.3 Sequence Of Operation --
Perishable Mode Heating 4-6.................................................................
4.9.4 Sequence Of operation -- Frozen Mode Cooling 4-6.........................................
4.9.5 Sequence Of Operation -- Defrost 4-6...................................................
TROUBLESHOOTING 5-1.........................................................................
5.1 UNIT WILL NOT START OR STARTS THEN STOPS 5-1......................................
5.2 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING 5-1..............................
5.3 UNIT RUNS BUT HAS INSUFFICIENT COOLING 5-2........................................
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 CONTROLLER MALFUNCTION 5-4........................................................
5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW 5-4..............................
5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION 5-4...................................
5.12 AUTOTRANSFORMER MALFUNCTION 5-4................................................
5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH 5-4........................
5.14 COMPRESSOR OPERATING IN REVERSE 5-5.............................................
5.15 ABNORMAL TEMPERATURES 5-5........................................................
5.16 ABNORMAL CURRENTS 5-5..............................................................

iv
T--322
TABLE OF CONTENTS (cont)
SERVICE 6-1....................................................................................
6.1 SECTION LAYOUT 6-1...................................................................
6.2 SERVICE VALVES 6-1....................................................................
6.3. MANIFOLD GAUGE SET 6-1..............................................................
6.4 PUMPING THE UNIT DOWN 6-2..........................................................
6.5 REFRIGERANT LEAK CHECKING 6-3.....................................................
6.6 EVACUATION AND DEHYDRATION 6-3....................................................
6.6.1 General 6-3..........................................................................
6.6.2 Preparation 6-3.......................................................................
6.6.3 Procedure - Complete system 6-4.......................................................
6.6.4 Procedure - Partial System 6-4.........................................................
6.7 REFRIGERANT CHARGE 6-4.............................................................
6.7.1 Checking the Refrigerant Charge 6-4....................................................
6.7.2 Adding Refrigerant to System (Full Charge) 6-5...........................................
6.7.3 Adding Refrigerant to System (Partial Charge) 6-5........................................
6.8 COMPRESSOR -- Model RSH105 6-5......................................................
6.8.1 Removal and Replacement of Compressor 6-5...........................................
6.9 COMPRESSOR OIL LEVEL 6-6...........................................................
6.10 HIGH PRESSURE SWITCH 6-7...........................................................
6.10.1 Replacing High Pressure Switch 6-7.....................................................
6.10.2 Checking High Pressure Switch 6-7.....................................................
6.11 CONDENSER COIL 6-7..................................................................
6.12 CONDENSER FAN AND MOTOR ASSEMBLY 6-8...........................................
6.13 FILTER-DRIER 6-8.......................................................................
6.14 EXPANSION VALVES 6-8.................................................................
6.14.1 Checking Superheat. 6-8..............................................................
6.14.2 Valve Replacement 6-9................................................................
6.15 EVAPORATOR COIL AND HEATER ASSEMBLY 6-10.........................................
6.15.1 Evaporator Coil Replacement 6-10.......................................................
6.15.2 Evaporator Heater Replacement 6-10....................................................
6.16 ECONOMIZER, UNLOADER, LIQUID INJECTION AND OIL RETURN SOLENOID VALVE 6-10.....
6.17 EVAPORATOR FAN AND MOTOR ASSEMBLY 6-11..........................................
6.17.1 Replacing The Evaporator Fan Assembly 6-11.............................................
6.18 EVAPORATOR FAN MOTOR CAPACITORS 6-11.............................................
6.18.1 When To Check For A Defective Capacitor 6-11...........................................
6.18.2 Removing The Capacitor 6-11...........................................................
6.18.3 Checking The Capacitor 6-12............................................................
6.19 VALVE OVERRIDE CONTROLS 6-12........................................................
6.20 SUCTION MODULATION VALVE 6-13.......................................................
6.20.1 Precheck Procedure 6-13...............................................................
6.20.2 Checking The Stepper valve 6-13........................................................

vT--322
TABLE OF CONTENTS (cont)
6.21 CONTROLLER 6-13.......................................................................
6.21.1 Handling Modules 6-13.................................................................
6.21.2 Controller Trouble-Shooting 6-14.........................................................
6.21.3 Controller Programming Procedure 6-14..................................................
6.21.4 Controller Programming Procedure 6-14..................................................
6.21.5 Removing and Installing a Module 6-15...................................................
6.22 TEMPERATURE SENSOR SERVICE 6-15...................................................
6.22.1 Sensor Checkout Procedure 6-15........................................................
6.22.2 Sensor Replacement 6-16..............................................................
6.22.3 Sensor Re--Installation 6-17.............................................................
6.23 ELECTRONIC PARTLOW TEMPERATURE RECORDER 6-17..................................
6.24 MAINTENANCE OF PAINTED SURFACES 6-19..............................................
6.25 COMPOSITE CONTROL BOX REPAIRS 6-19................................................
6.25.1 Introduction 6-19......................................................................
6.25.2 Cracks 6-20...........................................................................
6.25.3 Chips And Holes 6-20..................................................................
6.25.4 Inserts 6-20...........................................................................
6.25.5 Door Hinge Inserts 6-20................................................................
6.26 COMMUNICATIONS INTERFACE MODULE INSTALLATION 6-23..............................
ELECTRICAL WIRING SCHEMATICS 7-1...........................................................
7.1 INTRODUCTION 7-1.....................................................................
LIST OF ILLUSTRATIONS
FIGURE NUMBER Page
Figure 2-1 Refrigeration Unit -- Front Section 2-1.....................................................
Figure 2-2 Evaporator Section 2-2.................................................................
Figure 2-3 Compressor Section 2-3................................................................
Figure 2-4 Condenser Section 2-4..................................................................
Figure 2-5 Control Box Section 2-5.................................................................
Figure 2-6 Refrigeration Circuit Schematic -- Standard Operation 2-10...................................
Figure 2-7 Refrigeration Circuit Schematic -- Economized Operation 2-11.................................
Figure 2-8 Refrigeration Circuit Schematic -- Unloaded Operation 2-11...................................
Figure 3- 1 Temperature Control System 3-1........................................................
Figure 3- 2 Key Pad 3-2..........................................................................
Figure 3- 3 Display Module 3-2....................................................................
Figure 3- 4 Control Module 3-3....................................................................
Figure 3- 5 Standard Configuration Download Report 3-9..............................................
Figure 3- 6 Data Reader 3-10.......................................................................
Figure 4-1 Make Up Air Flow Chart 4-1.............................................................
Figure 4-2 Controller Operation -- Perishable Mode 4-4...............................................
Figure 4-3 Controller Operation -- Frozen Mode 4-5...................................................
Figure 4-4 Perishable Mode 4-5....................................................................
Figure 4-5 Perishable Mode Heating 4-6............................................................
Figure 4-6 Frozen Mode 4-6.......................................................................
Figure 4-7 Defrost 4-7............................................................................
Figure 6-1 Service Valve 6-1......................................................................

vi
T--322
LIST OF ILLUSTRATIONS
FIGURE NUMBER Page
Figure 6-2 Suction Service Valve 6-1...............................................................
Figure 6-3 Manifold Gauge Set 6-1.................................................................
Figure 6-4 R-134a Manifold Gauge/Hose Set 6-2.....................................................
Figure 6-5. Refrigeration System Service Connections 6-3............................................
Figure 6-6. Compressor Service Connections 6-4....................................................
Figure 6-7 Compressor Upper Mounting 6-6.........................................................
Figure 6-8 Compressor Lower Mounting 6-6.........................................................
Figure 6-9 High Pressure Switch Testing 6-7.........................................................
Figure 6-10 Thermostatic Expansion Valve Bulb 6-8..................................................
Figure 6-11 Evaporator Expansion Valve 6-9.........................................................
Figure 6-12 Economizer Expansion Valve 6-9........................................................
Figure 6-13 Hermetic Thermostatic Expansion Valve Brazing Procedure 6-9.............................
Figure 6-14. Unloader Solenoid Valve 6-10...........................................................
Figure 6-15. Oil Return Solenoid Valve (ORV), Economizer Solenoid Valve (ESV),
Liquid Injection Solenoid Valve (LIV) 6-11.................................................
Figure 6-16. Evaporator Fan Assembly 6-11..........................................................
Figure 6-17 Suction Modulation Valve (SMV) 6-13.....................................................
Figure 6-18 Controller Section of the Control Box 6-14.................................................
Figure 6-19 Sensor Types 6-15.....................................................................
Figure 6-20 Typical Sensor and Cable Splice 6-16.....................................................
Figure 6-21 Supply Sensor Positioning 6-17..........................................................
Figure 6-22 Return Sensor Positioning 6-17..........................................................
Figure 6-23. Electronic Partlow Temperature Recorder 6-19............................................
Figure 6-24 Door Hinge Repair 6-20.................................................................
Figure 6-25. Insert Location 6-22....................................................................
Figure 6-26. Communications Interface Installation 6-23................................................
Figure 7-1 LEGEND 7-1..........................................................................
Figure 7-2 SCHEMATIC DIAGRAM 7-2.............................................................
Figure 7-3 SCHEMATIC DIAGRAM, WIRING DIAGRAM-- Electronic Partlow Recorder 7-3................
Figure 7-4 WIRING DIAGRAM 7-4................................................................

vii T--322
LIST OF TABLES
TABLE NUMBER Page
Table 2-1 Safety and Protective Devices 2-8..........................................................
Table 3-1 Key Pad Function 3-2.....................................................................
Table 3-2 DataCORDER Configuration Variables 3-8..................................................
Table 3-3 DataCORDER Standard Configurations 3-8..................................................
Table 3-4 Controller Configuration Variables 3-12.......................................................
Table 3-5 Controller Function Codes 3-13.............................................................
Table 3-6 Controller Alarm Indications 3-16............................................................
Table 3-7 Controller Pre-Trip Test Codes 3-20..........................................................
Table 3-7 Controller Pre-Trip Test Codes 3-21..........................................................
Table 3-7 Temperature Controller Pre-Trip Test Codes 3-22..............................................
Table 3-7 Controller Pre-Trip Test Codes (Sheet 4 of 4) 3-23.............................................
Table 3-8 DataCORDER Function Code Assignments 3-24..............................................
Table 3-9 DataCORDER Pre-Trip Result Records 3-25..................................................
Table 3-10 DataCORDER Alarm Indications 3-26.......................................................
Table 6-1 Compressor Kit 6-5.......................................................................
Table 6-2 Sensor Temperature/Resistance Chart (+/--.002%) 6-16........................................
Table 6-3 Crack, Chip & Hole Repair Kit 6-21..........................................................
Table 6-4 Insert Repair Kit 6-21......................................................................
Table 6-5 Drill Information 6-21......................................................................
Table 6-6 Recommended Bolt Torque Values 6-23......................................................
Table 6-7 R-134a Temperature - Pressure Chart 6-24...................................................

1-1 T-322
SECTION 1
INTRODUCTION
1.1 INTRODUCTION
The Carrier Transicold model 69NT20--551--300 to 399
units are of lightweight aluminum frame construction,
designed to fit in the front of a container and serve as the
container front wall.
They are one piece, self-contained, all electric units
which are fitted with cooling and heating systems to
provide precise temperature control.
The units are supplied with a complete charge of
refrigerant R-134a and compressor lubricating oil and
are ready for operation upon installation. Forklift
pockets are provided for unit installation and removal.
The base unit operates on nominal 380/460 volt, 3
phase, 50/60 hertz power. An optional autotransformer
may be fitted to allow operation on nominal 190/230 , 3
phase, 50/60 hertz power. Power for the control system
is provided by a transformer which steps the supply
power down to 18 and 24 volts, single phase.
The controller is a Carrier Transicold Micro-Link 3
microprocessor. The controller will operate
automatically to select cooling, holding or heating as
required to maintain the desired set point temperature
within very close limits. The unit may also be equipped
with an electronic temperature recorder.
The controller is fitted with a keypad and display for
viewing or changing operating parameters. The display
is also equipped with lights to indicate various modes of
operation.
1.2 CONFIGURATION IDENTIFICATION
Unit identification information is provided on a model
plate located to the left of the economizer. The plate
provides the unit model number and the unit parts
identification number (PID). The model number
identifies the overall unit configuration while the PID
provides information on specific optional equipment,
factory provision to allow for field installation of optional
equipment and differences in detailed parts.
Configuration identification for the models covered
herein are provided in the Carrier Transicold Container
Unit Matrix that can be found at
www.container.carrier.com.
1.3 OPTION DESCRIPTIONS
Various options may be factory or field fitted to the base
unit. Brief descriptions of the options are provided in the
following subparagraphs.
1.3.1 Battery
The controller may be fitted with standard replaceable
batteries or a rechargeable battery pack.
1.3.2 Dehumidification
The unit may be fitted with a humidity sensor. This
sensor allows setting of a humidity set point in the
controller. In the dehumidification mode the controller
will operate to reduce internal container moisture level.
1.3.3 Control Box
The control box is constructed of composite material
and may be fitted with a lockable door.
1.3.4 Temperature Readout
The unit may be fitted with suction and discharge
temperature sensors. The sensor readings may be
viewed on the controller display.
1.3.5 Pressure Readout
The unit may be fitted with factory installed suction and
discharge pressure gauges. The unit is fitted with
suction and discharge transducers. The readings may
be viewed on the controller display.
1.3.6 Interrogator
Units that use the DataCORDER function are fitted with
interrogator receptacles for connection of equipment to
download the recorded data. Two receptacles may be
fitted, one accessible from the front of the unit and the
other mounted inside the container (with the USDA
receptacles).
1.3.7 Remote Monitoring
The unit may be fitted with a remote monitoring
receptacle. This item allows connection of remote
indicators for COOL, DEFROST and IN RANGE.
1.3.8 Communications
The unit may be fitted with a communications interface
module. The communications interface module is a
slave module which allows communication with a
master central monitoring station. The module will
respond to communication and return information over
the main power line. Refer to the ship master system
technical manual for further information.
1.3.9 Compressor
The unit is fitted with a scroll compressor.
1.3.10 Temperature Recorder
The units may be fitted with an electronic temperature
recording device manufactured by the Partlow
Corporation.
1.3.11 Back Panels
Back panel designs that may be fitted include panels of
aluminum and stainless steel. Panels may be fitted with
access doors and/or hinge mounting.

1-2
T-322
1.3.12 460 Volt Cable
Various power cable and plug designs are available for
the main 460 volt supply. The plug options tailor the
cables to each customers requirements.
1.3.13 Cable Restraint
Various designs are available for storage of the power
cables. These options are variations of the compressor
section front cover.
1.3.14 Upper Air (Fresh Air Make Up)
The unit may be fitted with an upper fresh air makeup
assembly. These assemblies are supplied in two
designs, the standard design and the micro design. The
openings may also be fitted with screens.
1.3.15 Evaporator
The unit is fitted with an evaporator coil and a hermetic
thermal expansion valve.
1.3.16 Evaporator Fan Operation
The units are fitted with Normal Evaporator Fan
Operation, opening of an evaporator fan internal
protector will shut down the unit.
1.3.17 Labels
Operating Instruction and Function Code listing labels
will differ depending on the options installed. For
example, additional operating instructions are required
to describe start--up of a unit equipped with an
autotransformer. Where the labels are available with
additional languages, they are listed in the parts list.
1.3.18 Plate Set
Each unit is equipped with a tethered set of wiring
schematic and wiring diagram plates.
The plate sets are ordered using a seven digit base part
number and a two digit dash number. (See Unit Matrix)
1.3.19 Controller
Replacement controllers may be ordered as a universal
un--configured controller (without configuration
software) or configured.
1.3.20 Condenser Grille
Two styles of condenser grilles are available, direct
bolted grilles and hinged grilles.

T-322
2-1
SECTION 2
DESCRIPTION
2.1 GENERAL DESCRIPTION
2.1.1 Refrigeration Unit -- Front Section
The unit is designed so that the majority of the
components are accessible from the front, see
Figure 2-1. The upper access panels allow entry into the
evaporator section, and the center access panel allows
access to the evaporator expansion valve, unloader
valve, suction modulation valve and evaporator coil
heaters. The unit model number, serial number and
parts identification number can be found on the serial
plate to the left of the economizer.
2.1.2 Fresh Air Makeup Vent
The function of the upper or lower makeup air vent is to
provide ventilation for commodities that require fresh air
circulation.
1
2
3
8
4
11
5
12
14
9
15
13
10
6
7
16
1. Access Panel (Evap. Fan #1)
2. Access Panel (Heaters, Suction Modulating
Valve, Unloader Valve & Evaporator
Expansion Valve)
3. Fork Lift Pockets
4. Control Box
5. Compressor
6. Receiver or Water Cooled Condenser
7. Economizer
8. Unit Serial Number, Model Number and
Parts Identification Number (PID) Plate
9. Power Cables and Plug
10. Condenser Fan
11. Interrogator Connector (Front left)
12. Blank Cover (Temperature Recorder Location)
13. Blank Cover (Lower Fresh Air Makeup Vent
Location)
14. Upper Fresh Air Makeup Vent
15. Access Panel (Evap. Fan #2)
16. Compressor Protection Panel (cutaway view)
Figure 2-1 Refrigeration Unit -- Front Section

2-2T-322
2.1.3 Evaporator Section
The evaporator section (Figure 2-2) contains the
temperature recorder bulb, return recorder sensor, return
temperature sensor, evaporator expansion valve,
unloader valve, suction modulation valve, dual-speed
evaporator fans (EM1 and EM2), evaporator coil and
heater, defrost heaters, defrost temperature sensor, heat
termination thermostat and suction temperature sensor.
The evaporator fans circulate air through the container
by pulling it in the top of the unit, directing it through the
evaporator coil, where it is heated or cooled, and
discharging it at the bottom.
The evaporator components are accessible by
removing the upper rear panel (as shown in the
illustration) or by removing the front access panels.
14
11 12
1
2
3
4
57
8
15
9
16
13
10 17
6
1. Evaporator Fan Motor #1
2. Return Recorder/Temperature Sensor
3. Humidity Sensor
4. Evaporator Fan Motor #2
5. Defrost Temperature Sensor
6. Heater Termination Thermostat
7. Evaporator Coil
8. Evaporator Coil Heaters
9. Evaporator Expansion Valve Bulb
10. Evaporator Expansion Valve
11. Low Side Access Valve
12. Suction Modulating Valve
13. Suction Temperature Sensor
14. To Compressor
15. From Coil
16. To Coil
17. Unloader Solenoid Valve
Figure 2-2 Evaporator Section

T-322
2-3
2.1.4 Compressor Section
The compressor section includes the compressor (with
high pressure switch) and the oil separator.
This section also contains the oil return solenoid,
compressor power plug, the discharge pressure
transducer, discharge temperature sensor and the
suction pressure transducers.
The supply temperature sensor, supply recorder sensor
and ambient sensor are located at the left side of the
compressor.
11
12
1
2
3
4
5
7
9
10
17 18 19
20
21
22
16
15
8
11
13
23
14
11
Discharge
Connection
(Hidden)
Economizer
Connection
Suction
Connection
Oil Return
Connection
6
1. Compressor Guard
2. Supply Temperature/Supply Recorder Sensor
Assembly
3. Ambient Sensor
4. Supply Air Thermometer Port (location)
5. Oil Drain
6. Compressor
7. Compressor Sight Glass
8 Compressor Power Plug
9. Discharge Service Valve
10. High Pressure Switch
11. Access Valve
12. Economizer Service Valve
13. Suction Service Valve
14. Discharge Temperature Sensor
15. Oil Return Service Valve
16. Discharge Pressure Transducer
17. Oil Return Solenoid Valve
18. Oil Separator
19. From Economizer
20. To Condenser
21. From Suction Modulating Valve
22. Suction Strainer
23. Suction Pressure Transducer
Figure 2-3 Compressor Section

2-4T-322
2.1.5 Air Cooled Condenser Section
The air cooled condenser section (Figure 2-4) consists
of the condenser fan, condenser coil, receiver, sight
glass/moisture indicator, liquid line service valve,
filter-drier and fusible plug.
The condenser fan pulls air in the bottom of the coil and it
is discharged horizontally out through the condenser fan
grille.
This section also contains the economizer, economizer
solenoid valve, economizer expansion valve and the
liquid injection solenoid valve.
5
6
7
17
1
24
3
811
9
12
15
14
16
27
18
19
20
21
22
23
24
25
26
10 13
1. Grille and Venturi Assembly
2. Condenser Fan
3. Key
4. Condenser Fan Motor
5. Condenser Coil
6. Condenser Motor Mounting Bracket
7. Condenser Coil Cover
8. Economizer
9. To Evaporator Expansion Valve
10. Liquid Injection Solenoid Valve
11. From Condenser
12. To Condenser
13. To Compressor Economizer Connection
14. To Unloader Solenoid Valve
15. From Compressor Discharge
16. Discharge Pressure Transducer
17. Oil Separator
18. To Oil Return Solenoid
19. Receiver
20. Sight Glass/Moisture Indicator
21. Sight Glass
22. Fusible Plug
23. Access Valve
24. Liquid Line Service Valve
25. Filter-Drier
26. Economizer Expansion Valve
27. Economizer Solenoid Valve
Figure 2-4 Condenser Section

T-322
2-5
2.1.6 Control Box Section
The control box (Figure 2-5) includes the manual
operation switches; circuit breaker (CB-1); compressor,
fan and heater contactors; control power transformer;
fuses; key pad; display module; current sensor module;
controller module expansion module and the
communications interface module.
2.1.7 Communications Interface Module
The communications interface module is a slave
module which allow communication with a master
central monitoring station. The module will respond to
communication and return information over the main
power line. Refer to the master system technical manual
for further information.
1819 141617
12 3 4 5 6
9810
13
7
111215
1. Compressor Phase A Contactor
2. Compressor Phase B Contactor
3. Heater Contactor
4. Display Module
5. Communications Interface Module
6. Controller/DataCORDER Module (Controller)
7. Key Pad
8. Start-Stop Switch
9. Remote Monitoring Receptacle
10. Manual Defrost Switch
11. Condenser Fan Switch
12. Controller Battery Pack
13. Interrogator Connector (Box Location)
14. Control Transformer
15. Evaporator Fan Contactor - High
16. Evaporator Fan Contactor - Low
17. Condenser Fan Contactor
18. Circuit Breaker -- 460V
19. Current Sensor Module
Figure 2-5 Control Box Section

2-6T-322
2.2 REFRIGERATION SYSTEM DATA
Model RSH105
Weight (Dry) 46.5 kg (103 lb)
a
C
o
m
p
r
e
s
s
o
r
/
M
o
t
o
r
Approved Oil Mobil ST32
a
.
C
o
m
p
r
e
s
s
o
r
/
M
o
t
o
r
Assembly Oil Charge 2957 ml (100 ounces)
A
s
s
e
m
b
l
y
Oil Sight Glass
The oil level range, with the compressor off,
should be between the bottom and one-eighth
level of the sight glass.
b. Evaporator Expansion
Valve Superheat
Verify at --18 _C
(0 _F) container box
temperature
4.4to6.7_C(8to12_F)
c. Economizer Expansion
Valve Superheat 4.4to11.1_C(8to20_F)
d
H
e
a
t
e
r
T
e
r
m
i
n
a
t
i
o
n
T
h
e
r
m
o
s
t
a
t
Opens 54 (¦3) _C = 130 (¦5) _F
d
.
H
eater
T
erm
i
nat
i
on
T
h
ermostat Closes 38 (¦4) _C = 100 (¦7) _F
e
H
i
g
h
P
r
e
s
s
u
r
e
S
w
i
t
c
h
Cutout 25 (¦1.0) kg/cm@= 350 (¦10) psig
e.
H
i
g
h
P
ressure
S
w
i
tc
h
Cut-In 18 (¦0.7) kg/cm@= 250 (¦10) psig
Unit Configuration Charge Requirements -- R-134a
Water-Cooled 5.33 k
g
f. Refrigerant Charge
W
a
t
e
r
-
C
o
o
l
e
d
Condenser
5
.
3
3
k
g
(11.75 lbs)
g
g
Receiver 4.99kg
(11.0 lbs)
g
F
u
s
i
b
l
e
P
l
u
g
Melting point 99 _C = (210 _F)
g.
F
us
i
b
l
e
P
l
ug Torque 6.2 to 6.9 mkg (45 to 50 ft-lbs)
h. Sight Glass/Moisture Indicator Torque 8.9 to 9.7 mkg (65 to 70 ft-lbs)
i
R
u
p
t
u
r
e
D
i
s
c
Bursts at 35 ¦5% kg/cm@= (500 ¦5% psig)
i
.
R
upture
D
i
sc Torque 6.2 to 6.9 mkg (45 to 50 ft-lbs)
j. Unit Weight Refer to unit model number plate.
k
W
a
t
e
r
P
r
e
s
s
u
r
e
S
w
i
t
c
h
Cut-In 0.5 ¦0.2 kg/cm@(7 ¦3psig)
k
.
W
ater
P
ressure
S
w
i
tc
h
Cutout 1.6 ¦0.4 kg/cm@(22 ¦5psig)