Thermo King CRR-20, Maintenance Manual

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CRR-20 & CRR-40, September 1999
Table of Contents iii
Electrical Maintenance 5-1
Unit Wiring 5-1
Auxiliary Battery and Battery Charger (Option) 5-1
High Pressure Cutout Switch 5-1
Condenser Fan and Evaporator Fan Rotation 5-2
Electric Heaters 5-3
Refrigeration Maintenance and
Service Operations 6-1
Service Tools 6-1
Compressor Discharge and Suction Service Valves 6-2
Gauge Manifold Valve Positions
6-3
Gauge Manifold Set Attachment and Purging 6-4
Checking Compressor Oil 6-5
Refrigerant Leak Test Procedure 6-6
Low Side Pump Down 6-7
Refrigerant Charge 6-7
Evacuation and Cleanup of the
Refrigeration System 6-9
Evaporator Pressure Regulator (KVQ) Valve 6-13
Refrigerant Recovery 6-15
Using Pressurized Nitrogen 6-16
Compressor Replacement 6-17
Condenser Coil Replacement 6-18
Dehydrator (Filter Drier) or In-line Filter
Replacement 6-18
Expansion Valve Replacement 6-19
Heat Exchanger Replacement 6-19
Receiver Tank Replacement 6-20
High Pressure Cutout Switch, Condenser Fan
Speed Switch or Compressor Discharge
Gas Temperature Sensor Replacement
6-20
Liquid Line Solenoid Valve 6-21
Liquid Injection Valve Replacement 6-21
Dehumidify Valve (Option) Replacement 6-22
Structural/Accessory Maintenance 7-1
Mounting Bolts 7-1
Unit Inspection 7-1
Condenser Coil 7-1
Evaporator Coil 7-1
Defrost Drains 7-2
Evaporator Fan Location 7-2
Condenser Fan Location 7-2
Fresh Air Exchange System 7-2
Partlow (Model SR) Recording Thermo-
meter (Option) 7-3
Recording Chart Replacement 7-3
Recording Stylus Calibration 7-3
Element Replacement 7-4
Saginomiya (Model SKM) Recording Thermo-
meter (Option) 7-4
Battery 7-4
Recording Chart Replacement 7-5
Recording Stylus Calibration 7-5
Power Element Assembly Replacement 7-6
Timer (Quartz Motor and Reducing Gear
Replacement 7-6
Battery Voltage Indicator 7-6
Humidify System (Option) 7-7
Pretrip Inspection 7-7
Inspection and Cleaning 7-7
Diagnosis 8-1
Mechanical Diagnosis 8-1
Refrigeration Diagnosis 8-5
Electrical, Refrigeration and
µµ
P-D Menu
Flow Diagrams 9-1
Electrical Schematic with Circuit Tracing 9-1 to 9-24
460/380 Vac Power Supply to Unit 9-1
230/190 Vac Power Supply to Unit 9-2
External 12 Vdc Battery Power Supply 9-3
Microprocessor Awakened from Sleep Mode 9-4
12.5 Vdc Control Circuit, Sensor Circuits,
Evaporator Pressure Regulator (KVQ)
Valve Circuit, Condenser Fan Pressure
Switch Circuit and Water Pressure
Circuit (Option)
9-5
24 Vac Control Circuit 9-6
Setpoint Enable Battery and Battery
Charger Circuit (Option) 9-7
Remote Monitor Receptacle (4-pin) for
Bridge Lights Circuit (Option) 9-8
TRANSFRESH ® Atmosphere Control
System Circuit (Option) 9-9
Integrated Remote Monitor System
Circuit (Option) 9-10
Dehumidify System, Humidity System,
Water Pressure Switch, USDA
Temperature Sensor, Pulp Sensor and
Chart Recorder Circuits (Options)
9-11