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Carel EVD ice - User Manual

Carel EVD ice
28 pages
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High Efficiency Solutions
EVD ice
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
User manual
Superheat control
for unipolar electronic expansion valve

Table of Contents

Questions and Answers

  • S
    Stacey PerryAug 17, 2025
    What causes incorrect superheat value measured by Carel EVD ice?
    • A
      Ashley WeissAug 18, 2025
      If the superheat value measured is incorrect, it could be due to a couple of reasons. First, the probe might not be measuring correct values. Check that the pressure and the temperature measured are correct and that the probe position is correct. Check the selection of pressure probe. Check the correct probe electrical connections. Also, the type of refrigerant set could be incorrect. Check and correct the type of refrigerant parameter.
  • R
    rebeccawrightAug 22, 2025
    Why is evaporation pressure high during Carel Control Unit start-up with high evaporator temperatures?
    • Q
      qlindseyAug 23, 2025
      If, in the start-up phase with high evaporator temperatures, the evaporation pressure is high, it could be due to MOP protection being disabled or ineffective. Activate the MOP protection by setting the threshold to the required saturated evaporation temperature (high evaporation temperature limit for the compressors) and setting the MOP integration time to a value above 0 (recommended 4 seconds). To make the protection more reactive, decrease the MOP integration time. It could also be due to a refrigerant charge excessive for the system or extreme transitory conditions at start-up (for cabinets only). Apply a 'soft start' technique, activating the utilities one at a time or in small groups. If this is not possible, decrease the values of the MOP thresholds on all the utilities.
  • Z
    Zachary BassAug 27, 2025
    What to do if liquid returns to compressor only when starting Carel Control Unit?
    • A
      Allison ValdezAug 27, 2025
      If liquid returns to the compressor only when starting the controller (after being OFF), it is possible that 'valve opening at start-up' parameter is set too high. Check the calculation in reference to the ratio between the rated cooling capacity of the evaporator and the capacity of the valve; if necessary, lower the value.
  • K
    kellymartinNov 2, 2025
    What to do if liquid returns to compressor during control with Carel EVD ice?
    • J
      Julie SmithNov 2, 2025
      If liquid is returning to the compressor during control, there are several potential causes. First, the superheat set point may be too low. Try increasing the superheat set point, initially to 11 K, and check for liquid return. Gradually reduce the set point while monitoring for liquid return. Alternatively, the low superheat protection might be ineffective. Increase the low superheat threshold and/or decrease the low superheat integration time. Start with a threshold 3 °C below the superheat set point and an integration time of 3-4 seconds, then gradually adjust. Also, enable the manual positioning and check the opening and closure of the valve. Check if the superheating is always low (
  • B
    bhernandezNov 6, 2025
    Why is the superheat value swinging around the set point with Carel Control Unit?
    • R
      ronaldrossNov 6, 2025
      If the superheat value swings around the set point with an amplitude greater than 4°C, consider these potential causes: unstable condensing pressure, superheat swings even with the valve set in manual control, superheat does NOT swing with the valve set in manual control, or the superheat set point is too low. * If the condensing pressure swings, check the controller condenser settings, giving the parameters 'blander' values (e.g. increase the proportional band or increase the integration time). Note: the required stability involves a variation within +/- 0.5 bars. If this is not effective or the settings cannot be changed, adopt electronic valve control parameters for perturbed systems. * If the superheat swings even with the valve set in manual control, check for the causes of the sw...
  • M
    Margaret BrooksNov 12, 2025
    What to do if liquid returns to compressor only after defrosting with Carel Control Unit?
    • R
      Russell HammondNov 12, 2025
      If liquid returns to the compressor only after defrosting (for multiplexed cabinets only), there are several potential causes. The superheat temperature measured by the driver after defrosting and before reaching operating conditions may be very low for a few minutes. Verify that the LowSH threshold is greater than the superheat value measured and that the corresponding protection is activated (integration time >0 s). If necessary, decrease the value of the integration time. Also, the superheat temperature measured by the driver may not reach low values, but there is still return of liquid to the compressor rack. Set more reactive parameters to bring forward the closing of the valve: increase the proportional factor to 30, increase the integration time to 250 s. Another cause may be that m...

Summary

Warnings and Safety Information

Waste Electrical and Electronic Equipment Disposal

Information on correct handling of WEEE according to EU directive.

Material Warranty Information

Specifies the 2-year warranty period for materials, excluding consumables.

Product Approval and Certification

Highlights quality and safety assurance via ISO 9001 certification and marks.

Introduction to EVD Ice Controller

EVD Ice Controller Models

Details available EVD ice controller models and their specifications.

Key Functions and Characteristics

Summary of key features and operational capabilities of the EVD ice controller.

Compatible Accessories

Information on compatible accessories like pressure probes and valve bodies.

Installation Guide

EVD Ice Controller Dimensions

Technical drawings showing the physical dimensions of the EVD ice unit.

Evaporator Assembly Instructions

Instructions for mounting the EVD ice controller onto the evaporator unit.

Application Diagrams

Schematic diagrams illustrating typical system configurations with EVD ice.

Wiring Description

Explanation of the wiring connections for the EVD ice controller and its components.

Wiring Procedures

Step-by-step instructions for wiring the EVD ice controller to the system.

User Interface Guide

Keypad Operation

Description of the function of each button on the EVD ice controller keypad.

Display and Visualisation Details

Explanation of the information displayed on the EVD ice controller screen.

Programming Mode Navigation

Instructions for entering and navigating the programming mode of the controller.

Factory Default Parameter Reset

Procedure for resetting the EVD ice controller to its factory default settings.

Commissioning the EVD Ice Controller

Step-by-Step Commissioning Procedure

Detailed procedure for the initial setup and commissioning of the EVD ice controller.

Initial Parameter Configuration

Guide to setting the initial parameters for the EVD ice controller.

EVD Ice Functions and Control

Control Modes and Superheat

Details on the superheat control mechanism and operating modes.

Smooth Lines Control Function

Description of the smooth lines function for optimizing evaporator capacity.

Service Parameter Configuration

Overview of service parameters for controller configuration and setup.

Protectors and Safety Features

Overview of Protectors

Details on the LowSH, LOP, and MOP protection features.

Controller Parameter Table

Network Connection and Configuration

RS485 Serial Communication Setup

Details on setting up serial communication via RS485 for the controller.

PC Commissioning via Network

Procedure for connecting the EVD ice controller to a PC for commissioning.

Visual Parameter Manager Software

Guide to using the Visual Parameter Manager software for configuration.

Restoring Default Controller Parameters

Steps to restore the controller to its default parameter settings via RS485.

Direct Copy Setup Method

Method for copying controller configurations directly from one unit to another.

Configuration File Setup

Instructions for creating and loading configuration files for the EVD ice controller.

Reading Controller Configuration Files

Procedure to verify the configuration file loaded onto the controller.

Serial Connection Variables

List of variables accessible and manageable via serial connection.

EVD Ice Control States

Detailed Explanation of Operating States

Details the various operational modes including forced closing, standby, wait, control, positioning, and stop.

Special Control States

Manual Valve Positioning

Procedure for manually adjusting the valve position.

Retrieve Physical Valve Position

Procedure to resynchronize the valve's physical position with the driver's internal steps.

Unblock Valve Procedure

Procedure for unblocking the electronic valve when it is suspected to be stuck.

EVD Ice Alarms

Classification of Alarm Types

Classification of alarms into system and control types.

Probe Measurement Alarms

Explanation of alarms related to sensor measurements and their interpretation.

Control Operation Alarms

Details on alarms triggered during the control operation, including protector alarms.

Emergency Valve Closing

Procedure for emergency valve closing, especially with Ultracap module during power failure.

Network Communication Alarms

Description of alarms related to network communication failures.

Alarm Summary Table

Table summarizing alarm codes, causes, reset methods, and control effects.

Troubleshooting Common Issues

Problem Diagnosis and Solutions

Detailed guide to diagnosing and resolving common operational issues and malfunctions.

Technical Specifications Overview

Carel EVD ice Specifications

General IconGeneral
BuzzerYes
Protection degreeIP20
Frequency50/60 Hz
Analogue inputs2
Analogue outputs2
TypeController

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