Related Manuals for Danfoss EETc 21
Summarization of Contents
Introduction to EET Series Controllers
Controller Variants
Lists the different EETC and EETa controller models available.
Controller Applications
Outlines typical uses for the EET series controllers in refrigeration.
Key Features of EET Controllers
Summarizes the main capabilities and advantages of the EET series.
Controller Functions and Features
Voltage Protection
Protects the compressor from voltage fluctuations by limiting operation within specified limits.
Compressor Protection Against Short Cycling
Prevents rapid ON/OFF cycles for compressor longevity by enforcing minimum run/stop times.
Zero Cross Technology
Controls relay switching near the voltage curve's zero crossing for reduced wear and noise.
Compressor Protection Against High Condensing Temperature
Protects the compressor from overheating due to poor condenser performance.
Advanced Fan Control
Optimizes fan operation for uniform cooling and energy saving during compressor OFF cycles.
Initial Pull Down
Accelerates cooling at power-up by adjusting defrost intervals to reach target temperature faster.
Automatic Pull Down
Provides faster, extra cooling in response to increased cabinet temperature from door openings.
Economy Mode
Saves energy by adjusting setpoints based on demand or time of day for reduced consumption.
Holiday Mode
Offers energy savings during periods of non-usage by adjusting setpoints for extended periods.
Dual Evaporator Defrost
Enables control for refrigeration cabinets with two defrost heaters and two evaporator sensors.
Dual Compressor Control
Manages two compressors in a refrigeration system for specific cooling requirements.
Anti-Freeze Function
Prevents freezing of stored products in low ambient temperatures by switching between cooling and heating.
Quick Test Mode
Facilitates testing of all controller outputs on production lines or during field service.
Sensor Error Handling
Manages cabinet temperature control during sensor failure to prevent food spoilage.
Potentiometer Error Handling
Sets default cabinet temperature to prevent spoilage in case of potentiometer failure.
Installation Guide
Dimensions and Mounting
Provides physical measurements and mounting details for EETC and EETa controllers.
Electrical Connections
Details the wiring diagrams and terminal connections for EETC and EETa models.
Mounting Procedures
Illustrates the procedure and torque specifications for mounting the controller.
Wire Routing Guidelines
Offers guidance on proper cable management to prevent water ingress and interference.
Available Accessories
Lists optional components like KoolKey, programming keys, and adapters for enhanced functionality.
Product Specification Details
Technical Specifications
Lists detailed technical data, including voltage, relay ratings, dimensions, and operating ranges.
Controller Parameters and Settings
Assignment Parameters
Configures sensor types, S2/S3 ports, and relay assignments for controller setup.
Thermostat Parameters
Defines temperature limits, differentials, and pull-down settings for precise temperature control.
Compressor Parameters
Sets parameters for compressor run times, stop times, and delays to protect the unit.
Alarm Parameters
Configures temperature alarm limits, delays, and door open alarm settings.
Defrost Parameters
Manages defrost cycles, including type, intervals, duration, and termination conditions.
Fan Parameters
Controls fan operation, including method, delays, cycles, and limit temperature settings.
ECO Management Parameters
Enables and configures energy-saving modes, including offsets and door delays.
System Protection Parameters
Sets voltage protection, condenser limits, and error handling for system integrity.
Test Mode Parameters
Allows selection of operating modes for normal, manual, or self-diagnostic testing.
Service Parameters
Provides access to parameter versions, software info, and temperature readings for service.
Light Control Parameters
Controls cabinet lighting based on mode (normal, ECO) and door status with delays.
ECO Strategy Parameters
Configures Holiday Mode parameters and temperature offsets for energy savings during absence.
Automatic Heater Control
Manages an auxiliary heater for preventing freezing in outdoor installations during winter.
Troubleshooting and Alarms
Troubleshooting Common Issues
Lists common problems, their probable causes, and recommended remedies for operational issues.
Alarm Indications and Faults
Explains alarm indications via LED blinking patterns and lists common fault codes.
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