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Superfreezer CRR DF MP4000 Media type icon

    • i Introduction
      • General Information
      • Revision History
      • Recover Refrigerant
      • R-134a/R-23
      • Customer Satisfaction Survey
  • Chapter 1: Safety Precautions
    • 1.1: Danger, Warning, Caution, and Notice
    • 1.2: General Practices
    • 1.3: Refrigerant Hazards
    • 1.4: Electrical Hazards
      • High Voltage
      • Low Voltage
    • 1.5: Electrostatic Discharge Precautions
      • Electrostatic Discharge and the Controller
    • 1.6: Welding on Refrigeration Units or Containers
    • 1.7: First Aid
    • 1.8: Identifying Unit Safety and Warning Decals
    • 1.9: Serial Number Location
      • Component Serial Number Identification
  • Chapter 2: Service Guide
  • Chapter 3: Specifications
    • 3.1: Full Cool Operation Net Cooling Capacity
    • 3.2: System Net Defrost Heating Capacity
    • 3.3: Evaporator Airflow
    • 3.4: R-134a Refrigeration System
    • 3.5: R-23 Refrigeration System
    • 3.6: Electrical System
    • 3.7: Microprocessor Controller
    • 3.8: Physical Specifications
    • 3.9: Compressor Torque — 3D Copeland Compressor Bolt Torque
    • 3.10: Metric Hardware Torque Charts
  • Chapter 4: Unit Description
    • 4.1: General Description
      • Cascade Refrigeration System
      • R-134a Semi-hermetic Reciprocating Compressor
      • R-23 Hermetic Scroll Compressor
      • Microprocessor Controller
      • Power Module Fuses
      • Three Evaporator Fans
      • USDA Cold Treatment Temperature Recording
      • REFCON Remote Monitoring Modem (RMM)
    • 4.2: Operating Modes
      • Frozen Loads
  • Chapter 5: Unit Operation
    • 5.1: Basic Unit Controls, Instruments and Protection Devices
      • MP4000 Controller
      • Back-up Battery
    • 5.2: R-134a Refrigeration System Controls, Instruments and Protection Devices
    • 5.3: R-23 Refrigeration System Controls, Instruments and Protection Devices
    • 5.4: Power Selection
    • 5.5: Pre-load Operation
      • Pre-Trip Conditions
      • Pre-Trip Checks
    • 5.6: Loading Procedure
    • 5.7: Post Load Procedure
    • 5.8: Starting the Unit on Ship
  • Chapter 6: Operating Instructions MP4000
    • 6.1: Function Keys
      • Unit On/Off Key
    • 6.2: Sequence of Operation
      • 6.2.1: Unit Start-up
      • 6.2.2: Initiating a Manual Defrost
      • 6.2.3: Pretrip Inspection (PTI)
      • 6.2.4: Lock Padlock
      • 6.2.5: Controller Back-up Battery
    • 6.3: Controller Lockup Issue
    • 6.4: Emergency Run Mode
      • Rotation Check
      • FULL COOL Mode
      • DEFROST Mode
      • Low Speed Fans Only
  • Chapter 7: Controller Description
    • 7.1: MP4000 Controller
      • Back-up Battery
      • Input and Output Signals
    • 7.2: Standard Display
      • Idle Screen and Check Symbol
      • Unit Status Display
      • Display Icons
      • Mode Descriptions
      • 7.2.1: Viewing Alarms/Messages from Standard Display
      • 7.2.2: Display Alternate Fahrenheit (F) or Celsius (C) Temperatures
      • 7.2.3: Changing Setpoint
      • 7.2.4: Main Menu
    • 7.3: Keys and Indicator LEDs
      • Function Keys
      • Special Function Keys
      • Indicator LEDs
  • Chapter 8: Navigating Controller Operating Menu
    • Menu Scrolling Keys
    • Changing Screen Contrast
  • Chapter 9: Main Menu
    • 9.1: Main Menu
    • 9.2: Values Menu
    • 9.3: Controls Menu
      • 9.3.1: Temperature Setpoint
      • 9.3.2: Defrost Termination
    • 9.4: Alarm Menu
      • Alarm Code States
      • Alarm Codes
    • 9.5: Message Menu
    • 9.6: Configuration Menu
      • Unit
      • Options
      • System
      • Clock
      • Calibrate
      • Icon Menu
    • 9.7: Log View Menu
    • 9.8: Info Menu
  • Chapter 10: Special Function Keys - User Activated Commands
    • 10.1: PTI Key
    • 10.2: PTI (Pretrip) Test
    • 10.3: Defrost Key
    • 10.4: PTI (Pretrip) Tests
      • 10.4.1: Manual Function Test
      • 10.4.2: Function Test
  • Chapter 11: Operating Theory
    • 11.1: Frozen Loads (Setpoint at -10 C [14 F] and Below)
      • Cooling Capacity Display in Main Screen
    • 11.2: High Temperature Protection
    • 11.3: Probe Test
    • 11.4: Continuous Temperature Control Operation
      • Frozen Loads — Controller Setpoint at -10 C (14 F) and Below
      • Defrost
    • 11.5: Data Recording and Downloading Data
  • Chapter 12: Controller Maintenance
    • 12.1: Controller Door Open and Close Instructions
    • 12.2: Flashloading Controller Software
    • 12.3: MP4000 Test System Tool
    • 12.4: Controller Replacement
  • Chapter 13: Electrical Maintenance
    • 13.1: Unit Wiring
    • 13.2: High Pressure Cutout Switch
      • R-23 High Pressure Cutout Switch
      • R-134a High Pressure Cutout Switch
    • 13.3: Low Pressure Transducer R23
      • Removal
      • Installation
    • 13.4: Pressure Transducer (Sensor)
      • Removal
      • Installation
    • 13.5: Condenser Fan and Evaporator Fan Rotation
      • Check Condenser Fan Rotation
      • Check Evaporator Fan Rotation
    • 13.6: Temperature Sensors
      • Sensor Installation
      • Sensor Testing
      • Resistance Values for Temperature Sensors
  • Chapter 14: Refrigeration Maintenance
    • 14.1: Introduction
    • 14.2: Tools
    • 14.3: Vacuum Pump
    • 14.4: Filters and Cartridges
    • 14.5: Refrigerant Recovery Equipment
    • 14.6: Detecting Leaks
    • 14.7: Special Service Fittings
    • 14.8: Oil Acid Test
    • 14.9: Checking Compressor Oil
      • Checking the Compressor Oil Level
      • Adding Compressor Oil
      • Removing Excess Compressor Oil
    • 14.10: Isolate Compressor
    • 14.11: Service Valve Positions
    • 14.12: Gauge Manifold Connections
      • Before You Proceed
      • Gauge Manifold Positions
      • Gauge Connections: Balancing Pressure, Removing Refrigerant, and Charging System
    • 14.13: Low Side Pump Down (R-134a Compressor Only)
    • 14.14: Gauge Manifold Set
      • Using a New Gauge Manifold Set
      • Gauge Manifold Valve Positions
    • 14.15: Gauge Manifold Set Installation and Removal
    • 14.16: Checking Refrigerant Charge
      • 14.16.1: Checking the R-134a Refrigerant Charge
      • 14.16.2: Checking the R-23 Refrigerant Charge
    • 14.17: Receiver Tank Sight Glass
    • 14.18: Leak Testing Refrigeration System
    • 14.19: Using Pressurized Nitrogen
      • Safety Precautions
      • Purge High Side to Low Side
      • Maximum Gas Pressures
    • 14.20: Recovering Refrigerant from System
      • 14.20.1: Recovery for System Repair
        • R-134a Vapor Recovery
        • R-134a Liquid Recovery
    • 14.21: Evacuation and Cleanup of Refrigeration System
      • 14.21.1: Unit Preparation and Hookup
      • 14.21.2: Unit Evacuation
      • 14.21.3: Pressure Rise Test
      • 14.21.4: Factors Affecting Speed of System Evacuation
      • 14.21.5: Heat Saves Time
    • 14.22: Charging System with Refrigerant
      • 14.22.1: R-134a Final Charging Procedure for Partially Charged Units
      • 14.22.2: Checking the R-23 Refrigerant Charge
      • 14.22.3: Final Charging Procedure for Partially Charged Units on Empty Containers R-23
      • 14.22.4: Charging Procedure for Partially Charged Units on Loaded Containers R-23
    • 14.23: Compressor Replacement
      • Removal
      • Installation
    • 14.24: Condenser Coil Replacement
    • 14.25: Filter Drier Replacement
      • Removal
      • Installation
    • 14.26: Evaporator Expansion Valve (TXV) Replacement
    • 14.27: Expansion Valve Replacement
      • Removal
      • Installation
    • 14.28: Heat Exchanger Replacement
      • Removal
      • Installation
    • 14.29: Receiver Tank Replacement
      • Removal
      • Installation
    • 14.30: High Pressure Cutout Switch Replacement
      • Removal
      • Installation
    • 14.31: Liquid Line Solenoid Valve Replacement (R-134a System Only)
      • Removal
      • Installation
  • Chapter 15: Diagnostics
    • 15.1: Introduction
    • 15.2: MP4000 Diagnostics
    • 15.3: Mechanical Diagnostics
    • 15.4: Refrigeration Diagnostics
    • 15.5: Status Messages and Controller Actions
    • 15.6: Alarm Codes and Corrective Actions
  • Chapter 16: Diagrams
    • 16.1: Diagram Index
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Unit Operation

In this section:

  1. Basic Unit Controls, Instruments and Protection Devices
  2. R-134a Refrigeration System Controls, Instruments and Protection Devices
  3. R-23 Refrigeration System Controls, Instruments and Protection Devices
  4. Power Selection
  5. Pre-load Operation
  6. Loading Procedure
  7. Post Load Procedure
  8. Starting the Unit on Ship
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