Carel EVD Evolution Twin User Manual (English)

Victor CollinsAug 1, 2025

Why is the superheat value measured by my Carel EVD Evolution Twin incorrect?

F
frazierstevenAug 1, 2025
There are a couple of potential reasons why the superheat value measured by your Carel Controller might be incorrect. First, the probe may not be measuring correct values. Ensure that the pressure and temperature measurements are accurate, and that the probe is positioned correctly. Also, verify that the minimum and maximum pressure parameters for the pressure transducer set on the driver correspond to the range of the installed pressure probe and check the probe's electrical connections. Second, the refrigerant type setting could be incorrect. In this case, you should check and correct the refrigerant type parameter.

Model	EVD Evolution Twin
Category	Controller
Protection Rating	IP20
Humidity	10% to 90% RH (non-condensing)
Serial Ports	RS485
Communication Protocols	Modbus RTU
Outputs	4 relay outputs
Display	LCD
Temperature Range	-10°C to +55°C

Model

EVD Evolution Twin

1. INTRODUCTION

1.1 Models

Lists the available EVD evolution twin model codes and their descriptions.

1.2 Main functions and features

Summarizes the primary capabilities and features of the controller.

2. INSTALLATION

2.1 DIN rail assembly and dimensions

Details physical installation requirements and device dimensions.

2.2 Description of the terminals

Explains the function of each terminal connection on the controller.

2.3 Connection diagram - superheat control

Provides a wiring diagram for superheat control setup.

2.4 Installation

Outlines the step-by-step process for installing the controller.

Installation environment

Specifies environmental conditions to avoid for proper controller installation.

Drivers in a serial network

Describes how to connect multiple controllers in a serial network configuration.

2.6 Shared pressure probe

Explains how to configure a shared pressure probe for multiple drivers.

2.8 Connecting the module EVBAT00400

Details connecting the EVBAT00400 module for power failure management.

2.9 Connecting the USB/RS485 converter

Explains how to connect the USB/RS485 converter for serial communication.

2.10 Upload, Download and Reset parameters (display)

Describes parameter management functions accessible via the display.

2.12 General connection diagram

Presents a comprehensive wiring diagram for various system configurations.

3. USER INTERFACE

3.1 Assembling the display board (accessory)

Instructions for installing and using the optional display board.

3.2 Display and keypad

Overview of the controller's display screen and keypad functions.

3.3 Switching between drivers (display)

How to navigate and view information for individual drivers on the display.

3.4 Display mode (display)

Using the display to view system variables and electrical connection details.

3.5 Programming mode (display)

Procedures for modifying controller parameters via the display interface, including Service and Manufacturer levels.

4. COMMISSIONING

4.1 Commissioning

General overview of the commissioning process and interface options.

4.2 Setting the pLAN network address

Guidelines for assigning network addresses for pLAN communication.

4.3 Guided commissioning procedure (display)

Step-by-step guide for controller configuration using the display.

4.4 Checks after commissioning

Procedures for verifying controller setup and operation after commissioning.

4.5 Other functions

Details on accessing and utilizing additional controller functions.

5. CONTROL

5.1 Main control

Defines the primary operating modes available for each driver.

5.2 Superheat control

Explains the superheat control function and its operational principles.

5.3 Adaptive control and autotuning

Describes features for automatic optimization of control parameters.

5.4 Control with Emerson Climate Digital Scroll ™™™ compressor

Details specific control for Digital Scroll compressors via CAREL PCO.

5.5 Special control

Overview of special control modes including EPR and hot gas bypass.

Transcritical CO₂ gas cooler

Control strategy for transcritical CO₂ systems using a gas cooler.

Analogue positioner (4 to 20 mA)

Valve positioning control using a 4-20mA analogue input signal.

Analogue positioner (0 to 10 Vdc)

Valve positioning control using a 0-10V analogue input signal.

5.6 Programmable control

Configuration of custom control logic using inputs and parameters.

Programmable control configuration

Details parameters for configuring programmable control logic.

Direct/reverse control - Tens of thousands

Setting the direction of control action for programmable logic.

AUX control - Thousands

Configuring auxiliary control functions and protectors.

Controlled value - Tens

Selecting the physical value (temperature, pressure) for control.

Options/programmable control set point

Setting specific set points for programmable control functions.

5.7 Control with refrigerant level sensor

Using the controller for liquid level control in evaporators/condensers.

6. FUNCTIONS

6.1 Power supply mode

Configuration options for the controller's power supply.

6.2 Battery charge delay

Setting a delay for battery charging after power loss events.

6.3 Network connection

Information on configuring network communication settings.

6.4 Inputs and outputs

Configuration and calibration of analogue inputs and probes.

Digital inputs

Details the configuration options for digital inputs 1 and 2.

Relay outputs

Explains the various configuration options for the relay outputs.

6.5 Control status

Describes the different operational states of the electronic valve.

Forced closing

Procedure for setting the initial valve position upon power-up.

Standby

Defines the standby operating state and related parameters.

Wait

Describes the wait state before control starts and the associated delay.

Positioning (change cooling capacity)

How valve position adjusts based on unit cooling capacity changes.

6.6 Special control status

Explains special statuses like manual positioning and unblocking.

Manual positioning

How to manually set the valve position for specific operations.

Unblock valve

Procedure to diagnose and unblock a potentially stuck valve.

Recover physical valve position

Resynchronizing the valve's physical position with the controller's internal state.

7. PROTECTORS

7.1 Protectors

Detailed explanation of the LowSH, LOP, and MOP protection features.

LowSH (low superheat)

Details the low superheat protection function and its parameters.

LOP (low evaporation pressure)

Details the low evaporation pressure protection function and its parameters.

MOP (high evaporation pressure)

Details the high evaporation pressure protection function and its parameters.

9. ALARMS

9.1 Alarms

Overview of alarm types, causes, and signaling methods.

Table of alarms

Detailed list of alarms with checks and solutions for each.

9.2 Alarm relay configuration

How to configure the relay output for alarm notifications.

9.3 Probe alarms

Explains alarms generated by probe measurement errors.

9.4 Control alarms

Details alarms related to active control functions and protectors.

9.5 EEV motor alarm

Specific alarm related to the electronic expansion valve motor.

9.6 LAN error alarm

Describes alarms triggered by LAN network connection issues.

12. APPENDIX 1: VPM (VISUAL PARAMETER MANAGER)

12.1 Installation

Instructions for installing the VPM software tool.

12.2 Programming (VPM)

Guide to using the VPM software for controller configuration and programming.

12.3 Copying the setup

How to transfer configuration settings between controllers using VPM.

12.4 Setting the default parameters

Steps to reset controller parameters to their default values.

12.5 Updating the controller and display firmware

Instructions for updating the controller and display firmware via VPM.

13. APPENDIX 2: EVD EVOLUTION SINGLE

13.1 Enable single mode on twin

How to activate single driver mode on the twin controller.

13.2 User interface – LED card

Explanation of the status LEDs on the controller's interface.

13.3 Connection diagram - superheat control

Wiring diagram for superheat control when using single driver mode.

13.4 Parameters enabled/disabled for control

Lists parameters that are active or inactive in single driver mode.

13.5 Programming with the display

How to program parameters for driver B using the display.

13.6 Auxiliary refrigerant

Setting the auxiliary refrigerant for cascade system configurations.

13.7 S3 e S4 inputs

Details the configuration and use of probes S3 and S4.

13.8 Main control – additional functions

Explains additional main control functions utilizing probes S3 and S4.

13.9 Auxiliary control

Details auxiliary control functions and their dependencies on probes and main control.

Modulating thermostat

Explains the modulating thermostat function for stable temperature control.

Backup probes on S3 & S4

How to use S3 and S4 as backup probes for S1 and S2 in case of faults.

Subcooling measurement

Function to measure subcooling using probes S3 and S4.

Reverse high condensing temperature protection (HiTcond) on S3

Explains reverse HiTcond protection for CO₂ cascade systems.

Carel EVD Evolution Twin User Manual

Table of Contents

Questions and Answers:

Carel EVD Evolution Twin Specifications

Summary

User manual

WARNINGS

DISPOSAL