Danfoss AK-CC55 Operating guide

Operating Guide

Control of stepper motor valves

with AK-CC55 Single Coil, EKE 1P and EKE 2U

Wiring and controller set-up

84B8326

Operating Guide | Control of stepper motor valves with AK-CC55 Single Coil, EKE 1P, EKE 2U

Introduction

Wiring example

AK-CC55 Single Coil can be set up to control stepper motor valves.

This document will describe how the wiring is done and how the controller can be set up.

The stepper motor valve is controlling the injection of refrigerant into the evaporator, hence replacing the AKV valve. The AKV valve output can then be used to control a solenoid valve in the liquid line. The solenoid valve will close in case of power failure.

A stepper motor driver is needed to convert the analogue output that the AK-CC55 controller can deliver to a stepper motor output. The stepper motor driver used here is the EKE 1P.

There is no bus communication between the AK-CC55 controller and the EKE 1P, but the controller can receive a “--- Driver alarm” in case of an alarm on the EKE 1P.

A back-up power module can be installed to secure closure of the stepper motor valve in case of power failure. The power module used here is the EKE 2U.

This stepper driver feature is implemented in software version 1.53 of the AK-CC55 Single Coil controller.

The sketch below is showing how the analogue output on the AK-CC55 controller is connected to the EKE 1P stepper motor driver where the stepper motor valve is connected.

The sketch also shows how the back-up power module is integrated.

When the wiring is done, the controller and the two modules can be powered up.

132

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

S2 S3 S4 S5 S6 DI2AO1

115 – 230 V AC

LN 1

AKVAlarm RailheatDefrost LightFan

2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

DI1/ AI7

0 – 10 V

Application 4

B-A MODBUS

115 – 230 V AC

LOAD SWITCH

Backup power module

DI3

EKE 2U - 080G5555

SoH communication (optional)

COM

D-D+RGND

RS-485

5V+

DI2

COM

RGND

D-

D+

Superheat controller EKE xx - 080G5xxx

Main switch DI1/Com.

DI1

5V+

DI2

CAN RJ

COM

AI4

AI3

AI2

AI1

COM

CAN RJ

DI1

COM

AI4

AI3

AI2

AI1

COM

Danfoss

Setting up AK-CC55 Single Coil using KoolProg

–/~

+/~

GND

Bat+

A1A2B1B2NO1C1NC1

+/~

GND

Bat+

Stepper valve digital output

A1A2B1B2NO1C1NC1

Power

24 V

PWR 24 VWbat

SoH

SGND

GND

–/~

+/~

-/~

+24 V

RED

GREEN

–/~

Products used in this example: AK-CC55 Single Coil, 084B4082, SW version 1.53 EKE 1P, 080G0325, SW version 2.10 EKE 2U, 080G5555, PV00

KoolProg is a PC software which can be downloaded from the KoolProg download site where the User Guide can also be found. Please notice that the User Guide describes the need for an MMIMYK interface (Code No. 080G0073), a Mini USB cable and an RJ11 cable (Code No. 080G0075) for connection with AK-CC55 controller. The controller can also be set up using the AK-CC55 Connect App (a mobile phone application) via the AK-UI55 Bluetooth display and it can be set up via the AK-SM 800A type System Manager.

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