Name: Carrier 69NT40-551-001
Brand: Carrier
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Container Refrigeration

T -- 320 R ev A

OPERATION AND SERVICE

for

69NT40--551--001 TO 199

Container Refrigeration Units

Table of Contents4
Description15
General Description15
Refrigeration Unit -- Front Section15
Fresh Air Makeup Vent15
Figure 2-1 Refrigeration Unit -- Front Section15
Evaporator Section16
Figure 2-2 Evaporator Section16
Compressor Section17
Figure 2-3 Compressor Section17
Air Cooled Condenser Section18
Figure 2-4 Condenser Section18
Water-Cooled Condenser Section19
Figure 2-5 Water-Cooled Condenser Section19
Control Box Section20
Communications Interface Module20
Figure 2-6 Control Box Section20
Refrigeration System Data21
Electrical Data22
Safety and Protective Devices23
Table 2-1 Safety and Protective Devices23
Refrigeration Circuit24
Standard Operation24
Economized Operation24
Unloaded Operation24
Figure 2-7 Refrigeration Circuit Schematic -- Standard Operation25
Figure 2-8 Refrigeration Circuit Schematic -- Economized Operation26
Figure 2-9 Refrigeration Circuit Schematic -- Unloaded Operation26
Microprocessor27
Temperature Control Microprocessor System27
Figure 3- 1 Temperature Control System27
Key Pad28
Display Module28
Figure 3- 2 Key Pad28
Figure 3- 3 Display Module28
Table 3-1 Key Pad Function28
Controller29
Controller Software29
Configuration Software (Configuration Variables)29
Operational Software (Function Codes)29
Figure 3- 4 Control Module29
Modes of Operation30
Temperature Control -- Perishable Mode30
Defrost Interval30
Failure Action30
Generator Protection30
Compressor High Temperature, Low Pressure Protection30
Perishable Mode -- Conventional30
Perishable Mode -- Economy30
Perishable Mode -- Dehumidification31
Perishable, Dehumidification -- Bulb Mode31
Temperature Control -- Frozen Mode31
Frozen Mode -- Conventional32
Frozen Mode -- Economy32
Controller Alarms32
Unit Pre-Trip Diagnostics32
Datacorder33
Description33
Datacorder Software33
Sensor Configuration (Dcf02)34
Table 3-2 Datacorder Configuration Variables34
Table 3-3 Datacorder Standard Configurations34
Figure 3- 5 Standard Configuration Download Report35
Logging Interval (Dcf03)36
Thermistor Format (Dcf04)36
Sampling Type (Dcf05 & Dcf06)36
Alarm Configuration (Dcf07 -- Dcf10)36
Datacorder Power-Up36
Pre-Trip Data Recording36
Datacorder Communications36
Figure 3- 6 Data Reader36
USDA Cold Treatment37
USDA Cold Treatment Procedure37
Datacorder Alarms37
ISO Trip Header38
Table 3-4 Controller Configuration Variables38
Table 3-5 Controller Function Codes39
Table 3-6 Controller Alarm Indications42
Table 3-7 Controller Pre-Trip Test Codes46
Table 3-8 Datacorder Function Code Assignments50
Table 3-9 Datacorder Pre-Trip Result Records51
Table 3-10 Datacorder Alarm Indications52
Operation53
INSPECTION (before Starting)53
Connect Power53
Connection to 380/460 Vac Power53
Connection To190/230 Vac Power53
Adjust Fresh Air Makeup Vent53
Figure 4-1 Autotransformer53
Upper Fresh Air Makeup Vent54
Lower Fresh Air Makeup Vent54
Fresh Air Position Sensor54
Figure 4-2 Make up Air Flow Chart54
Connect Water-Cooled Condenser55
Water--Cooled Condenser with Water Pressure Switch55
Water-Cooled Condenser with Condenser Fan Switch55
Connect Remote Monitoring Receptacle55
Starting and Stopping Instructions55
Starting the Unit55
Stopping the Unit55
Start--Up Inspection55
Physical Inspection55
Check Controller Function Codes55
Complete Inspection56
Pre-Trip Diagnosis56
Observe Unit Operation57
Probe Check57
Sequence of Operation57
Sequence of Operation -- Compressor Phase Sequence57
Figure 4-3 Controller Operation -- Perishable Mode58
Sequence of Operation -- Perishable Mode Cooling59
Sequence of Operation -- Perishable Mode Heating59
Figure 4-5 Perishable Mode59
Figure 4-6 Perishable Mode Heating59
Sequence of Operation -- Frozen Mode Cooling60
Sequence of Operation -- Defrost60
Figure 4-7 Frozen Mode60
Figure 4-8 Defrost60
Emergency Bypass Operation61
Troubleshooting62
Unit will Not Start or Starts then Stops62
Unit Operates Long or Continuously in Cooling62
Unit Runs but Has Insufficient Cooling63
Unit will Not Heat or Has Insufficient Heating63
Unit will Not Terminate Heating63
Unit will Not Defrost Properly63
Abnormal Pressures (Cooling)64
Abnormal Noise or Vibrations64
Controller Malfunction65
Evaporator Air Flow or Restricted Air Flow65
Thermostatic Expansion Valve Malfunction65
Autotransformer Malfunction65
Water-Cooled Condenser or Water Pressure Switch65
Compressor Operating in Reverse66
Abnormal Temperatures66
Abnormal Currents66
Service67
Section Layout67
Manifold Gauge Set67
Figure 6-1 Manifold Gauge Set67
Figure 6-2 R-134A Manifold Gauge/Hose Set67
Figure 6-3 Service Valve68
Refrigerant Leak Checking69
Evacuation and Dehydration69
Figure 6-5. Standard Piping Compressor Service Connections70
Adding Refrigerant to System (Partial Charge)71
Figure 6-6. Semi--Hermetic Piping Refrigeration System Service Connections71
Compressor73
Removal and Replacement of Compressor73
Table 6-1 Compressor Kit73
Figure 6-7 Compressor Upper Mounting74
Figure 6-8 Compressor Lower Mounting74
Compressor Oil Level75
High Pressure Switch76
Replacing High Pressure Switch -- Units with Standard Piping (with Service Valves)76
Replacing High Pressure Switch -- Units with Semi--Hermetic Piping (Without Service Valves)76
Checking High Pressure Switch76
Condenser Coil76
Condenser Fan and Motor Assembly76
Figure 6-9 High Pressure Switch Testing76
Water Cooled Condenser Cleaning77
Filter-Drier78
Figure 6-11 Water Cooled Condenser Cleaning - Gravity Circulation78
Expansion Valves79
Checking Superheat79
Figure 6-12 Thermostatic Expansion Valve Bulb79
Figure 6-13 Hermetic Thermostatic Expansion Valve Brazing Procedure79
Valve Replacement80
Evaporator Coil Replacement80
Evaporator Heater Replacement80
Figure 6-14 Evaporator Expansion Valve80
Figure 6-15 Quench & Economizer Expansion Valves80
ECONOMIZER, UNLOADER and Oil RETURN SOLENOID VALVE81
Evaporator Fan and Motor Assembly81
Figure 6-16. Unloader Solenoid Valve81
Figure 6-17. Oil Return Solenoid Valve (ORV) and Economizer Solenoid Valve (ESV)81
Replacing the Evaporator Fan Assembly82
Disassemble the Evaporator Fan Assembly82
Assemble the Evaporator Fan Assembly82
Evaporator Fan Motor Capacitors82
When to Check for a Defective Capacitor82
Figure 6-18. Evaporator Fan Assembly82
Removing the Capacitor83
Valve Override Controls83
Suction Modulation Valve84
Precheck Procedure84
Checking the Stepper Valve84
Figure 6-19 Suction Modulation Valve (SMV)84
Autotransformer85
Controller85
Handling Modules85
Controller Trouble-Shooting85
Figure 6-20 Controller Section of the Control Box85
Controller Programming Procedure86
Removing and Installing a Module86
Vent Position Sensor Service87
Temperature Sensor Service87
Sensor Replacement87
Table 6-2 Sensor Temperature/Resistance Chart (+/--.002%)87
Sensor Re--Installation88
Figure 6-21 Sensor Types88
Figure 6-22 Sensor and Cable Splice88
Figure 6-23 Supply Sensor Positioning88
Figure 6-24 Return Sensor Positioning88
Maintenance of Painted Surfaces90
Figure 6-25. Electronic Partlow Temperature Recorder90
Door Hinge Inserts91
Figure 6-26 Door Hinge Repair91
Table 6-3 Crack, Chip & Hole Repair Kit92
Table 6-4 Insert Repair Kit92
Table 6-5 Drill Information92
Figure 6-27. Insert Location93
Communications Interface Module Installation94
Figure 6-28. Communications Interface Installation94
Table 6-6 Recommended Bolt Torque Values94
Table 6-7 R-134A Temperature - Pressure Chart95
Electrical Wiring Schematic96
Figure 7-1 LEGEND96
Figure 7-2 SCHEMATIC DIAGRAM97
Figure 7-3 SCHEMATIC DIAGRAM -- Transfresh and Emergency Bypass98
Figure 7-4 WIRING DIAGRAM99
Figure 7-5 SCHEMATIC DIAGRAM, WIRING DIAGRAM-- Electronic Partlow Recorder101

Brand	Carrier
Model	69NT40-551-001
Category	Refrigerator
Language	English

Carrier 69NT40-551-001 User Manual

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