Danfoss AK-CC 750A User guide

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User Guide

Controller for evaporator control

AK-CC 750A

ADAP-KOOL® Refrigeration control systems

Contents

1. Introduction .............................................................................3

Application .................................................................................................. 3

Principles...................................................................................................... 4

2. Design of a controller ..............................................................7

Module survey ........................................................................................... 8

Common data for modules .................................................................10

Controller ...........................................................................................12

Extension module AK-XM 101A .................................................14

Extension module AK-XM 102A / AK-XM 102B .....................16

Extension module AK-XM 103A .................................................18

Extension module AK-XM 204A / AK-XM 204B .....................20

Extension module AK-XM 205A / AK-XM 205B .....................22

Extension module AK-XM 208C ................................................24

Extension module AK-OB 110 ....................................................26

Display module EKA 163B / EKA 164B ..................................... 27

Graphic display MMIGRS2 ............................................................27

Power supply module AK-PS 075 / 150 ...................................28

Communication module AK-CM 102 .......................................29

Preface to design ....................................................................................30

Functions ............................................................................................30

Connections ...................................................................................... 31

Limitations ......................................................................................... 31

Design of a evaporator control ..........................................................32

Procedure: ..........................................................................................32

Sketch .................................................................................................. 32

Evaporator and refrigerator appliance functions ................32

Connections ...................................................................................... 34

Planning table .................................................................................. 35

Length .................................................................................................36

Linking of modules ......................................................................... 36

Determine the connection points ............................................37

Connection diagram ...................................................................... 38

Supply voltage ................................................................................. 39

Ordering ..................................................................................................... 40

3. Mounting and wiring .............................................................41

Mounting ................................................................................................... 42

Mounting of extension module on the basic module ....... 42

Wiring .......................................................................................................... 43

4. Conﬁguration and operation ................................................45

Conﬁguration ...........................................................................................47

Connect PC ........................................................................................ 47

Authorization .................................................................................... 48

Unlock the conﬁguration of the controllers ..........................49

System setup ....................................................................................50

Set plant type ................................................................................... 51

Deﬁnition of thermostat ............................................................... 52

Deﬁnition of sections .....................................................................53

Deﬁnition of defrost functions ................................................... 54

Deﬁnition of common functions ............................................... 55

Setup general alarm inputs ......................................................... 57

Setup separate thermostat functions ...................................... 58

Setup separate voltage functions ............................................. 59

Conﬁguration of inputs and outputs .......................................60

Set alarm priorities..........................................................................62

Lock conﬁguration ..........................................................................64

Check conﬁguration .......................................................................65

Check of connections ............................................................................ 66

Check of settings.....................................................................................67

Installation in network .......................................................................... 70

First start of control ................................................................................71

Start the control ...............................................................................72

Setup logs .......................................................................................... 73

Manual defrost ......................................................................................... 74

5. Regulating functions .............................................................75

Introduction ..............................................................................................76

Thermostat function .............................................................................. 77

Temperature alarms ............................................................................... 81

Common functions ................................................................................ 82

General monitoring functions ...........................................................85

Liquid injection ........................................................................................86

Defrost ........................................................................................................ 87

Miscellaneous ..........................................................................................92

Information ............................................................................................... 95

Alarm texts ................................................................................................ 96

Appendix - Recommended connection Group 1 ........................ 98

Appendix - Recommended connection Group 2 ......................102

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1. Introduction

Application

AK-CC 750A controllers are complete regulating units which together with valves and sensors constitute complete evaporator controls for refrigeration appliances and freezing rooms within commercial refrigeration. Generally speaking they replace all other automatic controls containing, inter alia, day and night thermostats, defrost, fan control, rail heat control, alarm functions, light control, thermo valve control, solenoid valve, etc. The controller is equipped with data communication and is operated via a PC. In addition to evaporator control the controller can give signals to other controllers about the operating condition, e.g. forced closing of expansion valves, alarm signals and alarm messages.

Advantages

• Control of 1 to 4 evaporator sections

• Adaptive superheat control ensures optimum evaporator usage in all operational circumstances.

• Electronic injection with AKV valve or stepper valve

• Traditional temperature regulation using on/oﬀ or modulating control of solenoid valve for both DX and indirect brine system.

• Weighted thermostat and alarm thermostat

• Defrost on demand based on evaporator capacity

• Appliance cleaning function

• Light control using door switch or network signal depending on day/night operation

• Rail heat pulsing depending on day/night operation or dew point

• Monitoring of door alarm and control of light/refrigeration depending on location of door switch.

• Log function for registration of historical parameter values and alarm modes.

Control

The controller’s main function is to control the evaporator so that the system constantly operates with the most energy-friendly refrigeration. A speciﬁc function for registration of the need for defrost will adapt the number of defrosts so that no energy is wasted on unnecessary defrosts and subsequent cooling-down cycles.

Adaptive defrosting

The AK-CC 750A includes an adaptive defrosting function. By using the injection valves opening degree as mass ﬂow sensor for the supply of refrigerant, the controller can monitor ice formation on the evaporator. If the load is too large for the standard defrost programme, the controller initiates additional automatic defrost cycles to eliminate the need for expensive service calls due to iced-up evaporators.

SW = 1.2x

Evaporator control of one, two, three or four evaporators

Control of cool or frost room

Control of cool or frost appliance

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Principles

The great advantage of this series of controllers is that it can be extended as the size of the plant is increased. It has been developed for refrigeration control systems, but not for any speciﬁc application – variation is created through the read-in software and the way you choose to deﬁne the connections. It is the same modules that are used for each regulation and the composition can be changed, as required. With these modules (building blocks) it is possible to create a multitude of various kinds of regulations. But it is you who must help adjusting the regulation to the actual needs – these instructions will assist you to ﬁnd your way through all the open questions so that the

regulation can be deﬁned and the connections made.

Controller

Top part

Advantages

• The controller’s size can “grow” as systems grow

• The software can be set for one or more regulations

• Several regulations with the same components

• Extension-friendly when systems requirements are changed

• Flexible concept:

- Controller series with common construction

- One principle – many regulation uses

- Modules are selected for the actual connection requirements

- The same modules are used from regulation to regulation

Extension modules

Bottom part

The controller is the cornerstone of the regulation. The module has inputs and outputs capable of handling small systems.

• The bottom part – and hence the terminals – are the same for all controller types.

• The top part is the intelligence with software. This unit will vary according to controller type. But it will always be supplied together with the bottom part.

• In addition to the software the top part is provided with connection for data communication and address setting.

Examples

A regulation with few connections can be performed with the controller module alone

If the system grows and more functions have to be controlled, the regulation can be extended. With extra modules more signals can be received and more relays cut in and out – how many of them – and which – is determined by the relevant application.

If there are many connections one or more extension modules have to be mounted

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Direct connection

Setup and operation of an AK controller must be accomplished via the “AK-Service Tool” software program.

The programme is installed on a PC, and setup and operation of the various functions are carried out via the controller’s menu displays.

Displays

The menu displays are dynamic, so that diﬀerent settings in one menu will result in diﬀerent setting possibilities in other menus.

A simple application with few connections will give a setup with few settings. A corresponding application with many connections will give a setup with many settings. From the overview display there is access to further displays for the regulation. At the bottom of the display there is access to a number of general functions, such as “time table”, “manual operation”, “log function”, “alarms”, and “service” (conﬁguration).

Network linking

The controller can be linked up into a LON-network together with other controllers in an ADAP-KOOL® refrigeration control system.

After the setup operation can be performed at a distance with, say, our software program type AKM.

Users

The controller comes supplied with several languages, one of which can be selected and employed by the user. If there are several users, they may each have their choice of language. All users must be assigned a user proﬁle which either gives access to full operation or gradually limits the operation to the lowest level that only allows you “to see”.

External display

An external display can be ﬁtted in order to show the air temperatures around the evaporators. In AK-CC 750A up to 4 displays can be mounted. A graphical display with control buttons can also be ﬁtted.

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Light-emitting diodes

A number of light-emitting diodes makes it possible to follow the signals that are received and transmitted by the controller.

Log

From the log function you can deﬁne the measurements you wish to be shown.

The collected values can be printed, or you may export them to a ﬁle. You can open the ﬁle in Excel or import in AKM. (The Log function is only available via AK-ST 500.)

If you are in a service situation you can show measurements in a trend function. The measurements are then made real-time and

displayed instantly.

■ Power

■ Comm

■ DO1 ■ Status

■ DO2 ■ Service Tool

■ DO3 ■ LON

■ DO4 ■ I/O Extension

■ DO5 ■ Alarm

■ DO6

■ DO7 ■ Display

■ DO8 ■ Service Pin

Slow ﬂash = OK Quick ﬂash = answer from gateway/ installed in network Constantly ON = error Constantly OFF = error

Flash = active alarm/not acknowledged Constant ON = Active alarm/acknowledged

Alarm

The display gives you an overview of all active alarms. If you wish to conﬁrm that you have seen the alarm you can cross it oﬀ in the acknowledge ﬁeld. If you want to know more about a current alarm you can click on it and obtain an information display on the screen.

A corresponding display exists for all earlier alarms. Here you can upload information if you need further details about the alarm

history.

Adaptive defrost

AK-CC 750A is equipped with an adaptive defrost function. By using an AKV valve (ETS/CCMT Valve) as mass ﬂow sensor for the supply of refrigerant the control can monitor ice formation on the evaporator. Function can cancel planned defrosts which are not necessary, and on its own initiative start a defrost if the evaporator is about to be blocked by rime and ice.

(ETS)

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2. Design of a controller

This section describes how the controller is designed.

The controller in the system is based on a uniform connection platform where any deviations from regulation to regulation is determined by the used top part with a speciﬁc software and by which input and output signals the relevant application will require. If it is an application with few connections, the controller module (top part with belonging bottom part) may be suﬃcient. If it is an application with many connections it will be necessary to use the controller module plus one or more extension modules.

This section will give you a survey of possible connections plus assistance in selecting the modules required by your actual application.

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Module survey

• Controller module – capable of handling minor plant requirements.

• Extension modules. When the numbers of evaporators becomes greater and additional inputs or outputs are required, modules can be attached to the controller. A plug on the side of the module will transmit the supply voltage and data communication between the modules.

• Top part The upper part of the controller module contains the intelligence. This is the unit where the regulation is deﬁned and where data communication is connected to other controllers in a bigger network.

• Connection types There are various types of inputs and outputs. One type may, for example, receive signals from sensors and switches, another may receive a voltage signal, and a third type may be outputs with relays etc. The individual types are shown in the table below.

Extension module with additional analog inputs

• Optional connection When a regulation is planned (set up) it will generate a need for a number of connections distributed on the mentioned types. This connection must then be made on either the controller module or an extension module. The only thing to be observed is that the types must not be mixed (an analog input signal must for instance not be connected to a digital input).

• Programming of connections The controller must know where you connect the individual input and output signals. This takes place in a later conﬁguration where each individual connection is deﬁned based on the following principle:

- to which module

- at which point (”terminals”)

- what is connected (e.g. pressure transmitter/type/

pressure range)

Extension module with additional relay outputs and additional analog inputs.

External display for appliance temperature etc.

Bottom part

Controller with analog inputs and relay outputs.

Top part

The module with additional relay outputs is also available in a version where the top part is provided with change-over switches so that the relays can be overridden.

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1. Controller

Type Function Application

AK-CC 750A Controller for evaporator control Refrigeration appliances control

2. Extension modules and survey of inputs and outputs

Type Analog

inputs

For sensors, pressure transmitters etc.

Controller 11 4 4 - - - -

Extension modules

AK-XM 101A 8

AK-XM 102A 8

AK-XM 102B 8

AK-XM 103A 4 4

AK-XM 204A 8

AK-XM 204B 8 x

AK-XM 205A 8 8

AK-XM 205B 8 8 x

AK-XM 208C 8 4

The following extension module can be placed on the PC board in the controller module. There is only room for one module.

AK-OB 110 2

On/Oﬀ outputs On/oﬀ supply voltage

Relay (SPDT)

Solid state Low voltage

(DI signal)

(max. 80 V)

High voltage (max. 260 V)

Analoge outputs

0 -10 V d.c. For valves

Stepper output

with step control

Module with switches

For override of relay outputs

3. AK operation and accessories

Type Function Application

Operation

AK-ST 500 Software for operation of AK controllers AK-operation

- Cable between PC and AK controller USB-A — USB-B (standard IT cable)

Accessories Power supply module 230 V / 115 V to 24 V

AK-PS 075 18 VA, 24 V d.c.

AK-PS 150 36 VA, 24 V d.c.

Accessories External display that can be connected to the controller module. For showing, say, the refrigeration appliances

EKA 163B Display

EKA 164B Display with operation buttons

MMIGRS2 Graphic display with operation buttons

- Cable between EKA display and controller Length = 2 m, 6 m

- Cable between graphic display and controller Length = 1,5 m, 3 m

Accessories Communication modules for controllers where modules cannot be connected continuously

AK-CM 102 Communication module

Supply for controller

Data communication for external extension modules

On the following pages there is data speciﬁc to each module.

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Common data for modules

Supply voltage 24 V d.c. / a.c. +/- 20%

Power consumption AK-__ (controller) 8 VA

AK-XM 101, 102, 103 2 VA

AK-XM 204, 205, 208 5 VA

Analog inputs Pt 1000 ohm /0°C Resolution: 0.1°C

PTC 1000 ohm /0°C

Pressure transmitter type AKS 32R / AKS 2050 / AKS 32 (1-5 V)

Voltage signal 0-10 V

Contact function (On/Oﬀ ) On at R < 20 ohm

On/oﬀ supply voltage inputs Low voltage

Relay outputs SPDT

Solid state outputs Can be used for loads that are cut in and

Stepper outputs Used for valves with stepper input 20-500 step/s

Ambient temperature During transport -40 to 70°C

0 / 80 V a.c./d.c.

High voltage 0 / 260 V a.c.

AC-1 (ohmic) 4 A

AC-15 (inductive) 3 A

U Min. 24 V

out frequently, e.g. : rail heat, fans and AKV valve

Accuracy: +/- 0.5°C (between -50°C and +50°C) +/- 1°C between -100°C and -50°C +/- 1°C between +50°C and +130°C

Resolution:1 mV Accuracy +/- 10 mV Max. connection of 5 pressure transmitters on one module

Oﬀ at R > 2K ohm (Gold -plated contacts not necessary)

Oﬀ: U < 2 V On: U > 10 V

Oﬀ: U < 24 V On: U > 80 V

Max. 230 V Low and high voltage must not be connected to the same output group

Max. 240 V a.c. , Min. 48 V a.c. Max. 0.5 A, Leak < 1 mA Max. 1 AKV

Separate supply to stepper outputs : 24 a.c./d.c./ xx VA

During operation -20 to 55°C ,

0 to 95% RH (non condensing) No shock inﬂuences / vibrations

Enclosure Material PC / ABS

Density IP10 , VBG 4

Mounting For mounting on panel wall or DIN rail

Weight with screw terminals modules in100- / 200- / controller-series Ca. 200 g / 500 g / 600 g

Approvals EU low voltage directive and EMC require-

ments are complied with

The mentioned data applies to all modules. If data is speciﬁc, this is mentioned together with the module in question.

LVD tested according to EN 60730 EMC tested Immunity according to EN 61000-6-2 Emission according to EN 61000-6-3

E31024 for CC-module

E357029 for XM and CM-modules

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Dimensions

The module dimension is 72 mm. Modules in the 100-series consist of one module Modules in the 200-series consist of two modules Controllers consist of three modules

The length of an aggregate unit = n x 72 + 8

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Controller

Function

There are several controllers in the series. The function is determined by the programmed software, but outwardly the controllers are identical – they all have the same connection possibilities: 11 analog inputs for sensors, pressure transmitters, voltage signals

and contact signals.

8 digital outputs, with 4 Solid state outputs and 4 relay outputs

Supply voltage

24 V a.c. or d.c. to be connected to the controller. The 24 V must not be retransmitted and used by other controllers as it is not galvanically separated from inputs and outputs. In other words, you must use a transformer for each controller. Class II is required. The terminals must not be earthed. The supply voltage to any extension modules is transmitted via the plug on the right-hand side. The size of the transformer is determined by the power requirement of the total number of modules.

The supply voltage to a pressure transmitter can be taken either from the 5 V output or from the 12 V output depending on transmitter type.

Data communication

If the controller is to be included in a system, communication must take place via the LON connection. The installation has to be made as mentioned in the separate instructions for LON communication.

Address setting

When the controller is connected to a gateway type AKA 245, the controller’s address must be set between 1 and 119. (1-200 at AK-SM..).

Service PIN

When the controller is connected to the data communication cable the gateway must have knowledge of the new controller. This is obtained by pushing the key PIN. The LED “Status” will ﬂash fast when the gateway sends an acceptance message.

Operation

The conﬁguration operation of the controller must take place from the software programme “Service Tool”. The program must be installed on a PC, and the PC must be connected to the controller via the network plug on the front of the unit.

Light-emitting diodes

There are two rows with LED’s. They mean: Left row:

• Voltage supply to the controller

• Communication active with the bottom PC board (red = error)

• Status of outputs DO1 to DO8

Right row:

• Software status (slow ﬂash = OK)

• Communication with Service Tool

• Communication on LON

• Communication with AK-CM 102

• Alarm when LED ﬂashes

- 1 LED that is not used

• Communication with display on RJ11 plug

• “Service Pin” switch has been activated

Address

■ Power

■ Comm

■ DO1 ■ Status

■ DO2 ■ Service Tool

■ DO3 ■ LON

■ DO4 ■ I/O Extension

■ DO5 ■ Alarm

■ DO6

■ DO7 ■ Display

■ DO8 ■ Service Pin

Keep the safety distance!

Low and high voltage must not be connected to the same output group

Slow ﬂash = OK Quick ﬂash = answer from gateway Installation in network Constantly ON = error Constantly OFF = error

Flash = active alarm/not cancelled Constant ON = Active alarm/cancelled

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Point

Point 1 2 3 4 5 6 7 8 9 10 11

Type AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8 AI9 AI10 AI11

Terminal 15: 12 V Terminal 16: 5 V

Terminal 27: 12 V Terminal 28: 5 V

Analog inputs on 1 - 11

Terminal 17, 18, 29, 30: (Cable screen)

The screen on the pressure transmitter cables must only be connected at the end of the controller.

Relay outputs on

16 - 19 Solid state outputs on 12 - 15

Relay or AKV coil fx 230 V a.c.

24 and 25 used only when "Option board ﬁtted"

Point 12 13 14 15 16 17 18 19

Type DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8

Signal Signal

type

Pt 1000 ohm/0°C

S2, S3 S4,

Pt 1000 S5 Saux

AKS 32R AKS 2050

AKS 32

3: Brown

2: Blue

1: Black

3: Brown

2: Black

1: Red

P0 Pc Paux

...

AKS 32R

AKS 2050

MBS 8250

-1 - xx bar

AKS 32

-1 - zz bar

0 - 5 V

0 - 10 V

Signal Module Point

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

Terminal

Signal type /

Active at

4 (AI 4) 7 - 8

5 (AI 5) 9 - 10

On/Oﬀ Ext.

Main switch

Day/ Night

Door Defrost

AKV

Fan Alarm Light Rail heat Defrost Night blind Valves Compressor

Option Board

Please see the signal on the page with the module.

Active at:

Closed

Open

Active at:

Oﬀ

6 (AI 6) 11 - 12

7 (AI 7) 13 - 14

8 (AI 8) 19 - 20

9 (AI 9) 21 - 22

10 (AI 10) 23 - 24

11 (AI 11) 25 - 26

12 (DO 1) 31 - 32

13 (DO 2) 33 - 34

14 (DO 3) 35 - 36

15 (DO 4) 37 - 38

16 (DO 5) 39 - 40- 41

17 (DO6) 42 - 43 - 44

18 (DO7) 45 - 46 - 47

19 (DO8) 48 - 49 - 50

24 -

25 -

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Extension module AK-XM 101A

Function

The module contains 8 analog inputs for sensors, pressure transmitters, voltage signals and contact signals.

Supply voltage

The supply voltage to the module comes from the previous module in the row.

Supply voltage to a pressure transmitter can be taken from either the 5 V output or the 12 V output depending on transmitter type.

Light-emitting diodes

Only the two top LED’s are used. They indicate the following:

• Voltage supply to the module

• Communication with the controller is active (red = error)

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Point

Point 1 2 3 4

Type AI1 AI2 AI3 AI4

Terminal 9: 12 V Terminal 10: 5 V

Pt 1000 ohm/0°C

AKS 32R AKS 2050

AKS 32

At the top the signal input is the left of the two terminals.

At the bottom the signal input is the right of the two terminals.

3: Brown

2: Blue

1: Black

3: Brown

2: Black

1: Red

Signal Signal

type

S2 S3 S4

Pt 1000

S5 Saux

AKS 32R

AKS 2050 P0 Pc

MBS 8250

-1 - xx bar

Paux

AKS 32

-1 - zz bar

Terminal 15: 5 V Terminal 16: 12 V

Terminal

11, 12, 13, 14:

(Cable screen)

The screen on the pressure transmitter cables must only be connected at the end of the controller.

Point 5 6 7 8

Type AI5 AI6 AI7 AI8

On/Oﬀ

...

Ext. Main switch Day/ Night Door Defrost

0 - 5 V

0 - 10 V

Active at:

Closed

Open

Signal Module Point

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 17 - 18

6 (AI 6) 19 - 20

7 (AI 7) 21 - 22

8 (AI 8) 23 - 24

Terminal

Signal type /

Active at

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Extension module AK-XM 102A / AK-XM 102B

Function

The module contains 8 inputs for on/oﬀ voltage signals.

Signal

AK-XM 102A is for low voltage signals. AK-XM 102B is for high voltage signals.

Supply voltage

The supply voltage to the module comes from the previous module in the row.

Light-emitting diodes

They indicate:

• Voltage supply to the module

• Communication with the controller is active (red = error)

• Status of the individual inputs 1 to 8 (when lit = voltage)

AK-XM 102A

Max. 24 V

On/Oﬀ: On: DI > 10 V a.c./d.c. Oﬀ: DI < 2 V a.c./d.c.

AK-XM 102B

Max. 230 V

On/Oﬀ: On: DI > 80 V a.c. Oﬀ: DI < 24 V a.c.

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Point

Point 1 2 3 4

Type DI1 DI2 DI3 DI4

Point 5 6 7 8

Type DI5 DI6 DI7 DI8

Signal Active at

AK-XM 102A: Max. 24 V AK-XM 102B: Max. 230 V

Ext. Main switch

Day/ Night

Door

Defrost

Closed

(voltage on)

Open

(voltage oﬀ)

(The module can not register a pulse signal from e.g. a reset function or a case cleaning function.)

Signal Module Point Terminal Active at

1 (DI 1) 1 - 2

2 (DI 2) 3 - 4

3 (DI 3) 5 - 6

4 (DI 4) 7 - 8

5 (DI 5) 9 - 10

6 (DI 6) 11 - 12

7 (DI 7) 13 - 14

8 (DI 8) 15 - 16

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Extension module AK-XM 103A

Function

The module contains : 4 analog inputs for sensors, pressure transmitters, voltage signals and contact signals. 4 analog voltage outputs of 0 - 10 V

Supply voltage

The supply voltage to the module comes from the previous module in the row.

Supply voltage to a pressure transmitter can be taken from either the 5 V output or the 12 V output depending on transmitter type.

Galvanic isolation

The inputs are galvanically separated from the outlets. The outlets AO1 and AO2 are galvanically separated from AO3 and AO4.

Light-emitting diodes

Only the two top LED’s are used. They indicate the following:

• Voltage supply to the module

• Communication with the controller is active (red = error)

Max. load

I < 2.5 mA R > 4 kΩ

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Point

At the top the signal input is the left of the two terminals.

At the bottom the signal input is the right of the two terminals.

Point 1 2 3 4

Type AI1 AI2 AI3 AI4

Terminal 9: 12 V Terminal 10: 5 V

Terminal 11, 12: (Cable screen)

The screen on the pressure transmitter cables must only be connected at the end of the

controller.

Galvanic isolation: AI 1-4 ≠ AO 1-2 ≠ AO 3-4

Signal Signal

Pt 1000 ohm/0°C

S2 S3 S4 S4 S5 Saux

AKS 32R

AKS 32

3: Brown

2: Blue

1: Black

3: Brown

2: Black

1: Red

Paux

...

On/Oﬀ Ext.

Main switch Day/ Night

Door Level switch

type

Pt 1000

AKS 32R /

AKS 2050

MBS 8250

-1 - xx bar

AKS 32

-1 - zz bar

0 - 5 V

0 - 10 V

Active at:

Closed

Open

Point 5 6 7 8

Type AO1 AO2 AO3 AO4

Signal Module Point Terminal Signal type /Active at

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AO 1) 17 - 18

6 (AO 2) 19 - 20

7 (AO 3) 21 - 22

8 (AO 4) 23 - 24

0-10 V

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Extension module AK-XM 204A / AK-XM 204B

Function

The module contains 8 relay outputs.

Supply voltage

The supply voltage to the module comes from the previous module in the row.

AK-XM 204B only Override of relay

Eight change-over switches at the front make it possible to override the relay’s function. Either to position OFF or ON. In position Auto the controller carries out the control.

Light-emitting diodes

There are two rows with LED’s. They indicate the following: Left row:

• Voltage supply to the controller

• Communication active with the bottom PC board (red = error)

• Status of outputs DO1 to DO8

Right row: (AK-XM 204B only):

• Override of relays ON = override OFF = no override

AK-XM 204A AK-XM 204B

Fuses

Behind the upper part there is a fuse for each output.

Max. 230 V

AC-1: max. 4 A (ohmic) AC-15: max. 3 A (Inductive)

AK-XM 204B Override of relay

Keep the safety distance!

Low and high voltage must not be connected to the same output group

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Point

Signal Active at

Fan Alarm Light Railheat Defrost Night blind Valve Compressor

Oﬀ

Point 1 2 3 4 5 6 7 8

Type DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8

Signal Module Point Terminal Active at

1 (DO 1) 25 - 27

2 (DO 2) 28 - 30

3 (DO 3) 31 - 33

4 (DO 4) 34 -36

5 (DO 5) 37 - 39

6 (DO 6) 40 - 41 - 42

7 (DO 7) 43 - 44 - 45

8 (DO 8) 46 - 47 - 48

AK-CC 750A RS8HP102 © Danfoss 2018-09 21

Extension module AK-XM 205A / AK-XM 205B

Function

The module contains: 8 analog inputs for sensors, pressure transmitters, voltage signals

and contact signals.

8 relay outputs.

Supply voltage

The supply voltage to the module comes from the previous module in the row.

AK-XM 205B only Override of relay

Eight change-over switches at the front make it possible to override the relay’s function. Either to position OFF or ON. In position Auto the controller carries out the control.

Light-emitting diodes

There are two rows with LED’s. They mean: Left row:

• Voltage supply to the controller

• Communication active with the bottom PC board (red = error)

• Status of outputs DO1 to DO8

Right row: (AK-XM 205B only):

• Override of relays ON = override OFF = no override

AK-XM 205A AK-XM 205B

max. 10 V

Fuses

Behind the upper part there is a fuse for each output.

Max. 230 V

AC-1: max. 4 A (ohmic) AC-15: max. 3 A (Inductive)

AK-XM 205B Override of relay

Keep the safety distance!

Low and high voltage must not be connected to the same output group

22 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Point

Pt 1000 ohm/0°C

Signal Signal

type

S2, S3 S4,

Pt 1000

S5 Saux

Point 1 2 3 4 5 6 7 8

Type AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8

Terminal 9: 12 V Terminal 10: 5 V

Terminal 21: 12 V Terminal 22: 5 V

Terminal 11, 12, 23, 24 :

(Cable screen)

The screen on the pressure transmitter cables must only be connected at the end of the controller.

Point 9 10 11 12 13 14 15 16

Type DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8

AKS 32R AKS 2050

AKS 32

On/Oﬀ

3: Brown

2: Blue

1: Black

3: Brown

2: Black

1: Red

P0 Pc Paux

...

Ext. Main switch Day/ Night Door Defrost

Fan Alarm Light Rail heat Defrost Night blind Valve Compr.

AKS 32R AKS 2050 MBS 8250

-1 - xx bar

AKS 32

-1 - zz bar

0 - 5 V 0 - 10 V

Active at:

Closed

Open

Active at:

Oﬀ

Signal Module Point

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 13 - 14

6 (AI 6) 15 - 16

7 (AI 7) 17 - 18

8 (AI 8) 19 -20

9 (DO 1) 25 - 26 - 27

10 (DO 2) 28 - 29 - 30

11 (DO 3) 31 - 30 - 33

12 (DO 4) 34 - 35 - 36

13 (DO 5) 37 - 36 - 39

14 (DO6) 40 - 41 - 42

15 (DO7) 43 - 44 - 45

16 (DO8) 46 - 47 - 48

Terminal

Signal type /

Active at

AK-CC 750A RS8HP102 © Danfoss 2018-09 23

Extension module AK-XM 208C

Function

The module contains: 8 analog inputs for sensors, pressure transmitters, voltage signals

and contact signals.

4 outputs for stepper motors.

Supply voltage

The supply voltage to the module comes from the previous module in the row. Here supplied with 5 VA.

The supply voltage to the valves must be from a separate supply, which must be galvanically separated from the supply for the control range. (Power requirements: 7.8 VA for controller + xx VA per valve).

Separate voltage supply is required

A UPS may be necessary if the valves need to open/close during a power failure.

Light-emitting diodes

There is one row with LED’s. It indicate the following:

• Voltage supply to the module

• Communication active with the bottom PC board (red = error)

• Step1 to step4 OPEN: Green = Open

• Step1 to step4 CLOSE: Green = Close

• Red ﬂash = Error on motor or connection

24 V d.c. Fx. 13 VA

max. 10 V

L = max. 30 m

Output:

24 V d.c.

20-500 step/s

Max phase current = 325 mA RMS

∑ P

= max. 21 VA

out

The connection to the valve must not be broken using a relay

Valve data

Type P

ETS 12.5 - ETS 400 KVS 15 - KVS 42 CCMT 2 - CCMT 8 CCM 10 - CCM 40 CTR 20

CCMT 16 - CCMT 42 5.1 VA

1.3 VA

Power supply to AK-XM 208C:

Fx: 7.8 + (4 x 1.3) = 13 VA  AK-PS 075

Fx: 7.8 + (4 x 5.1) = 28.2 VA  AK-PS 150

24 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Point

CCMT

Step / Terminal

ETS CCM / CCMT CTR KVS

Point 1 2 3 4 5 6 7 8

Type AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8

Terminal 17: 12 V Terminal 18: 5 V

Terminal 19, 20: (Cable screen)

The screen on the pressure transmitter cables must only be connected at the end of the controller.

Point 9 10 11 12

Step 1 2 3 4

Type AO

1 25 26 27 28

2 29 30 31 32

3 33 34 35 36

4 37 38 39 40

White Black Red Green

Valve Module Step Terminal

1 (point 9) 25 - 28

2 (point 10) 29 - 32

3 (point 11) 33 - 36

4 (point 12) 37 - 40

AK-CC 750A RS8HP102 © Danfoss 2018-09 25

Extension module AK-OB 110

Function

The module contains two analog voltage outputs of 0 – 10 V.

Supply voltage

The supply voltage to the module comes from the controller module.

Placing

The module is placed on the PC board in the controller module.

Point

The two outputs have points 24 and 25. They are shown on the earlier page where the controller is also mentioned.

Galvanic isolation

The outlets AO1 and AO2 are galvanically separated from the controller module, but not from each other.

Max. load I < 2.5 mA R > 4 kohm

AO 0 - 10 V

Module

Point 24 25

Type AO1 AO2

AO2

AO1

26 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Display module EKA 163B / EKA 164B

Function

Display of important measurements from the controller, e.g.

appliance temperature.

Setting of the individual functions can be performed by using the display with control buttons. It is the controller used that determines the measurements and settings that can occur.

Connection

The extension module is connected to the controller module via a cable with plug connections. You have to use one cable per module. The cable is supplied in various lengths.

Both types of display (with or without control buttons) can be connected to either display output A, B, C and D.

When the controller starts up, the display will show the output that is connected.

- - 1 = output A

- - 2 = output B etc.

EKA 163B EKA 164B

Placing

The extension module can be placed at a distance of up to 15 m from the controller module.

Point

No point has to be deﬁned for a display module – you simply connect it.

Graphic display MMIGRS2

Function

Setting and display of values in the controller.

Connection

The display connects to the controller via a cable with RJ11 plug connections.

Supply voltage

Received from the controller via cable and RJ11 connector.

Termination

The display must be terminated. Mount a connection between the terminals H and R. (AK-CC 750A is terminated internally.)

Placing

The display can be placed at a distance of up to 3 m from the

controller.

Point / Address

No point has to be deﬁned for a display – you simply connect it.

However, the address must be veriﬁed. See the instructions accompanying the controller.

AK-CC 750A RS8HP102 © Danfoss 2018-09 27

Power supply module AK-PS 075 / 150

Function

24 V supply for controller.

Supply voltage

230 V a.c or 115 V a.c. (from 100 V a.c. to 240 V a.c.)

Placing

On DIN-rail

Eﬀect

Type Output tension Output current Power

AK-PS 075 24 V d.c. 0.75 A 18 VA

AK-PS 150 24 V d.c.

(adjustable)

1.5 A 36 VA

Class II

Dimension

Type High Width

AK-PS 075 90 mm 36 mm

AK-PS 150 90 mm 54 mm

Supply to a controller

Connections

AK-PS 075

AK-PS 150

28 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Communication module AK-CM 102

Function

The module is a new communication module, meaning the row of extension modules can be interrupted. The module communicates with the regulator via data communication and forwards information between the controller and the connected extension modules.

Connection

Communication module and controller ﬁtted with RJ 45 plug connectors. Nothing else should be connected to this data communication; a maximum of 5 communication modules can be connected to one controller.

Communication cable

One metre of the following is enclosed: ANSI/TIA 568 B/C CAT5 UTP cable w/ RJ45 connectors.

Positioning

Max. 30 m from the controller (The total length of the communication cables is 30 m)

Max. 32 VA

Supply voltage

24 volt AC or DC should be connected to the communication module. The 24 V can be sourced from the same supply that supplies the controller. (The supply for the communication module is galvanically separated from the connected extension modules). The terminals must not be earthed. The power consumption is determined by the power consumption of the total number of modules. The controller strand load must not exceed 32 VA. Each AK-CM 102 strand load must not exceed 20 VA.

Point

Connection points on the I/O modules should be deﬁned as if the modules were an extension of each other.

Address

The address for the ﬁrst communication module should be set to

1. Any second module should be set to 2. A maximum of 5 modules can be addressed.

Termination

The termination switch on the ﬁnal communication module should be set to ON. The controller should permanently be set to = ON.

Warning

Additional modules may only be installed following the installation of the ﬁnal module. (Here following module no. 11; see the sketch.) After conﬁguration, the address must not be changed.

Max. 20 VA

AK-CC 750A RS8HP102 © Danfoss 2018-09 29

Preface to design

Be aware of the following when the number of extension modules is being planned. A signal may have to be changed, so that an additional module may be avoided.

• An ON/OFF signal can be received in two ways. Either as a contact signal on an analog input or as voltage on a low or highvoltage module.

• An ON/OFF output signal can be given in two ways. Either with a relay switch or with solid state. The primary diﬀerence is the permitted load and that the relay switch contains a cutout switch.

Mentioned below is a number of functions and connections that may have to be considered when a regulation has to be planned. There are more functions in the controller than the ones mentioned here, but those mentioned have been included in order that the need for connections can be established.

Functions

Clock function

Clock function and change-over between summer time and winter time are contained in the controller. The clock setting is maintained for at least 12 hours at a power failure. The clock setting is kept updated if the controller is linked up in a network with a system manager.

Start/stop of regulation

Regulation can be started and stopped via the software. External start/stop can also be connected.

Alarm function

If the alarm is to be sent to a signal transmitter, a relay output will have to be used.

Extra temperature sensors and pressure sensors

If additional measurements have to be carried out beyond the regulation, sensors can be connected to the analog inputs.

Forced control

The software contains a forced control option. If an extension module with relay outputs is used, the module’s top part can be with change-over switches – switches that can override the individual relays into either OFF or ON position.

Data communication

The controller module has terminals for LON data communication. The requirements to the installation are described in a separate document. Literature number RC8AC.

30 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Connections

In principle there are the following types of connections:

Analog inputs ”AI”

This signal must be connected to two terminals. Signals can be received from the following sources:

• Temperature signal from Pt 1000 ohm temperature sensor

• Pulse signal or reset signal

• Contact signal where the input is shortcircuited or ”opened”, respectively

• Voltage signal from 0 to 10 V

• Signal from pressure transmitter AKS 32, AKS 32R, AKS 2050 or MBS 8250. The supply voltage is supplied from the module’s terminal board where there is both a 5 V supply and a 12 V supply. When programming the pressure transmitter’s pressure range must be set.

ON/OFF voltage inputs ”DI”

This signal must be connected to two terminals.

• The signal must have two levels, either 0 V or ”voltage” on the input. There are two diﬀerent extension modules for this signal type:

- low-voltage signals, e.g. 24 V

- high-voltage signals, e.g. 230 V

When programming the function must be set:

• Active when the input is without voltage

• Active when voltage is applied to the input.

ON/OFF output signals ”DO”

There are two types, as follows:

• Relay outputs All relay outputs are with change-over relay so that the required function can be obtained when the controller is without voltage.

• Solid state outputs Primarily for AKV valves which connect quickly. But output can cut an external relay in and out, as with a relay output. The output is only found on the controller module.

When programming the function must be set:

• Active when the output is activated

• Active when the output is not activated.

Analog output signal ”AO”

This signal is to be used if a control signal is to be transmitted to an external valve or to fans with EC motors. When programming the signal range must be deﬁned: 0-5 V, 1-5 V, 0-10 V or 2-10 V.

Pulse signal for the stepper motors. This signal is used by valve motors of the type ETS, KVS, CCMT and CTR. The valve type should be set during programming.

Limitations

As the system is very ﬂexible regarding the number of connected units you must check whether your selection complies with the few limitations there are. The complexity of the controller is determined by the software, the size of the processor, and the size of the memory. It provides the controller with a certain number of connections from which data can be downloaded, and others where coupling with relays can be performed.

The controller is not made for use on plate heat exchanger.

AK-CC 750A RS8HP102 © Danfoss 2018-09 31

✔ The sum of connections cannot exceed 80.

✔ The number of extension modules must be limited so that the

total power will not exceed 32 VA (including controller).

✔ No more than 5 pressure transmitters may be connected to one

controller module.

✔ No more than 5 pressure transmitters may be connected to one

extension module.

Common pressure transmitter

If several controllers receive a signal from the same pressure transmitter, the supply to the aﬀected controllers must be wired so that it is not possible to switch oﬀ one of the controllers without also switching oﬀ the others. (If one controller is switched oﬀ, the signal will be pulled down, and all the other controllers will receive a signal which is too low)

Design of a evaporator control

Procedure:

1. Make a sketch of the system in question

2. Check that the controller’s functions cover the required application

3. Consider the connections to be made

4. Use the planning table. / Note down the number of connections ./ add up

5. Are there enough connections on the controller module? – If not, can they be obtained by changing an ON/OFF input signal from voltage signal to contact signal, or will an extension module be required?

6. Decide which extension modules are to be used

7. Check that the limitations are observed

8. Calculate the total length of modules

9. The modules are linked together

10. The connection sites are established

11. Draw a connection diagram or a key diagram

12. Size of supply voltage/transformer

Follow these 12 steps

Sketch

Make a sketch of the system in question.

Evaporator and refrigerator appliance functions

Application

Control of cold room or freezing room x

Control of refrigeration or freezing appliances x

Regulation of evaporators 1 - 4

Thermostat function

Common thermostat function for all sections x

Thermostat function for each section x

On/oﬀ thermostat with AKV / ETS or solenoid valve x

Modulating thermostat with AKV / ETS valve x

Change between two thermostat references (thermostat band) x

Day/night switch x

Displacement of reference via analog input signal x

Thermostat sensor before or after evaporator x

Thermostat sensor both before and after the evaporator (weighted thermostat)

Alarm thermostat (weighted) x

Common functions

Fan control (pulsation or EC motor) x

Rail heat control (pulsation) x

Compressor control. Relay active when refrigeration is demanded x

Appliance cleaning function x

Appliance shut down x

Door contact function x

Light function x

Night blind X

Forced closing x

Alarm output x

Start / stop of regulation x

AK-CC

750A

32 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Receive external on/oﬀ alarm signal 10

Receive external analog alarm signal 5

Product sensor with alarm function 4

Liquid injection

Control of AKV / stepper valves 4

Control of solenoid valves in liquid line 4

Superheat regulation wit P0 and S2 measurement x

MOP control x

Refrigerant choice x

Defrost function

Electrical defrost 4

Warm Brine defrost, Hot gas defrost x

Smelt function x

Drip tray heat X

Adaptive defrost x

Defrost stop on temperature or time x

Coordinated defrost via network x

Day/night signal for raising the reference

The built-in week diagram can be used for raising the thermostat reference, but it is also possible to use an external ON/OFF signal or a signal via the network.

Product sensors

Each appliance section has a separate product sensor which can be used for monitoring/registering the temperature.

Appliance cleaning function

A switch function with pulse pressure will activate the function whereupon refrigeration will be stopped. The fans continue operating. ”Later”: Next push on the switch will stop the fans. ”Still later”: Next push on the switch will restart refrigeration. When a display is mounted at the appliance the various situations may be followed by the readout: Normal operation: Appliance temperature 1st push: Fan 2nd push: OFF 3rd push: Appliance temperature

Miscellaneous

Dedicated alarm for refrigerant leak x

Alarm priorities x

Sensor correction x

Option for connection of separate display 4

Separate thermostats 5

Separate pressostats 5

System signals via data communication

Signal for P0-optimasation x

Night setback x

Inject ON-signal (forced closing) x

Light control x

Coordinated defrost x

Forced cooling x

A bit more about the functions

Common thermostat

The thermostat temperature can be either a weighting of the S3 and S4 sensors in section A. Alternatively, the thermostat temperature can be a minimum value, a maximum value or an average value of all S3 or S4 sensors for the refrigeration sections used.

Modulating thermostat

AKV / stepper:

The function can only be used on central plant.

The opening degree of the valve is adjusted so that an accurate, constant temperature is maintained. .

Solenoid valve:

This function can be used on both central systems and on indirect refrigeration appliances. The valve's duty cycle is adapted so that optimum temperature regulation is achieved on the basis of a speciﬁc time period. The valve's duty cycle is desynchronised so that an even load is achieved across the entire system

Appliance shut down

Signal about shutdown can be received via data communication or from a contact on a On/Oﬀ input.

Door switch function

In freezing and cold rooms the door switch is used for switching the light on and oﬀ, for starting and stopping the refrigeration, and for sounding the alarm if the door has been open for a long time

Light function

The light function can be activated by the door switch, the internal time diagram or a signal via the network.

Defrost sensor S5

On long evaporators it may be necessary to mount two sensors in order to ensure the correct defrost of the evaporator. The sensors are for example named S5A-1 and S5A-2.

“Inject ON” override function

The function closes expansion valves on the evaporator control when all compressors are stopped. The function can take place via the data communication, or it may be wired via a relay output.

Adaptive defrost

The function requires signals from S3 and S4 as well as from condensing pressure Pc. The expansion valve must furthermore be type AKV. The function cannot be used in combination with pulsation of fans.

If you want to know more about the functions, go to chapter 5.

Changeover between two thermostat references

The function is used for appliances where contents are frequently changed and where a diﬀerent thermostat reference is required. Changeover between the two references can take place by means of a switch function.

AK-CC 750A RS8HP102 © Danfoss 2018-09 33

Connections

Here is a survey of the possible connections. The texts can be read in context with the planning table in point 4.

Analog inputs

Temperature sensors each section

• S3 air sensor at evaporator inlet

• S4 air sensor at evaporator outlet (one of the S3/S4 sensors may

be omitted)

.• S5 defrost sensor. Two may be used for long sections

• Product sensor. Extra sensor that only checks the product tem-

perature

• S2 gas sensor at evaporator outlet (control of AKV valve).

• Saux 1-4, extra sensors, which can be used for general

thermostats or monitoring.

Pressure transmitters

• P0 For registration of the evaporating pressure (control of AKV

valve).

• Pc For registration of the condensing pressure. Can be used in

connection with adaptive defrost, or the signal can be received via data communication.

• Paux 1-3, extra transmitters, which can be used for general

pressostats or monitoring. A pressure transmitter type AKS 32R can supply signals to ﬁve controllers

Voltage signal

Ext. Ref. is used if the thermostat reference is to be displaced with a signal from another control.

• General 0-10 V inputs. Up to 5 inputs, which can be used for

monitoring and alarm function.

• External start/stop of regulation

• Pulse pressure (on a analogue input) used for the ”appliance cleaning” function

• Switch for changeover between two temperature referenc

• Inject ON. Signal from a compressor control

• Pulse pressure (on a analogue input) for start of defrost

• Pulse pressure (on a analogue input) for opening/closing Night blind

• Door switch in coldroom

• External day/night signal (raises the temperature reference when Night blind is used)

• Up to 10 general DI inputs for signals from other automatic controls serving to activate the controller’s alarm function

On/oﬀ-output

Relay outputs

• Defrost (one each section)

• Rail heat

• Fan motor

• Light

• Compressor (demand on cooling)

• Alarm relay

• Solenoid valve (EVR)

• Drain valve, Suction line valve

• Night blind

• Drip tray heat recovery

• General functions

AKV Solid state outputs

The solid state outputs on the controller module are primarily used for AKV valves, but may also be used for the functions mentioned under ”relay outputs”. (The output will always be “OFF” when the controller is hit by power failure).

On/Oﬀ-inputs

Contact function (on an analog input) or voltage signal (on an extension module)

Example

• Freezing appliance with three sections

• AKV is used for injections (S2 and P0)

• Electric defrost with stop based on temperature (S5)

• Two thermostat sensors per section (S3 and S4)

• Control of fans and rail heat

• External start/stop (Main switch)

• Switch signal for appliance cleaning

• 3 display for monitoring of appliance temperature

Analog output

• 0-10 V signal for valve regulation or fan with EC motor

• Stepper signal to ETS/CCMT valve

Data from this example is used in the planning table on the next page. The result is that the following modules should be used:

• AK-CC 750A controller

• AK-XM 101A

• 3 pcs. EKA 163B

If the result had demonstrated that an additional output was needed, AK-XM 205A or B would have been the required extension.

34 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Planning table

The table helps you establish whether there are enough inputs and outputs on the basic controller. If there are not enough of them, the controllers must be extended by one or more of the mentioned extension modules.

Note down the connections you will require and add them up

Analog inputs

Temperature sensors, S2, S3, S4, S5 12

Extra temperature sensor / Separate thermostats 0

Pressure transmitter , P0, Pc, Separate pressostats 1 P = Max. 5 / module

Voltage signal from an other regualtion, separate signals

Displacement of reference with analog signal

On/oﬀ inputs Kontakt 24 V 230 V

External start/stop (Main switch) 1

Case cleaning (pulse pressure). Shutdown 1

Switch between two temperature references

Inject ON

Start of defrost (pulse pressure)

Door contact

Night setback

General DI alarm inputs (1-10)

Open/ close Night blind (pulse pressure)

Analog input signal

Example

On/oﬀ voltage signal

Example

On/oﬀ voltage signal

Example

On/Oﬀ output signal

Example

Analog output 0-10 V

Stepper output

Example

Limitations

On/oﬀ outputs

AKV valves 3

Solenoid valves in liquid line

Fans 1

Defrost (electric or hot gas valves) 3

Drain valve, suction line valve

Rail heat 1

Light

Night blind

Drip tray heat

Compressor

Alarm

General: Thermostat1-5, Pressostat 1-5, Voltage.1-5

Analog control signal, 0-10 V

External valve regulation / EC motor

Valves with stepmotor

Sum of connections for the regulation 15 8 Sum = max. 80

Number of connections on a controller module 11 11 0 0 0 0 8 8 0 0 0

Missing connections, if applicable 4 -

The missing connections to be updated from one or more extension modules: Sum of power

AK-XM 101A (8 analog inputs) 1 ___ pcs. á 2 VA = __

AK-XM 102A (8 digital low voltage inputs) ___ pcs. á 2 VA = __

AK-XM 102B (8 digital high voltage inputs) ___ pcs. á 2 VA = __

AK-XM 103A (4 analog inputs, 4 analog outputs) ___ pcs. á 2 VA = __

AK-XM 204A / B (8 relay outputs) ___ pcs. á 2 VA = __

AK-XM 205A / B (8 analog inputs + 8 relay outputs) ___ pcs. á 5 VA = __

AK-XM 208C (8 analog inputs + 4 stepper outputs) ___ pcs. á 5 VA = __

AK-OB 110 (2 analog outputs) ___ pcs. á 0 VA = 0

1 pcs. á 8 VA = 8

Sum =

Sum = max. 32 VA

The example:

None of the 3 limitations are exceeded => OK

AK-CC 750A RS8HP102 © Danfoss 2018-09 35

Length

If you use many extension modules the controller’s length will grow accordingly. The row of modules is a complete unit which cannot be broken. If the row becomes longer than desired, the row can be broken by using AK-CM 102.

The module dimension is 72 mm. Modules in the 100-series consist of one module Modules in the 200-series consist of two modules The controller consist of three modules The length of an aggregate unit = n x 72 + 8

or in an other way:

Module Type Number at Length

Controller module 1 x 224 = 224 mm Extension module 200-series _ x 144 = ___ mm Extension module 100-series _ x 72 = ___ mm

Total length = ___ mm

Linking of modules

Start with the controller module and then mount the selected extension modules. The sequence is of no importance.

However, you must not change the sequence, i.e. rearrange the modules, after you have made the setup where the controller is told which connections are found on which modules and on which terminals.

The modules are attached to one another and kept together by a connection which at the same time transmits the supply voltage and the internal data communication to the next module.

Example continued: Controller module + 1 extension module in 100-series = 224 + 72 = 296 mm.

Example

Mounting and removal must always be performed when there is no voltage.

The protective cap mounted on the controller’s plug connection must be moved to the last vacant plug connection so that the plug will be protected against short-circuit and dirt.

When the regulation has started the controller will all the time check whether there is connection to the connected modules. This status can be followed by the light-emitting diode.

When the two catches for the DIN rail mounting are in open position the module can be pushed into place on the DIN rail – no matter where in the row the module is found. Removal is likewise carried out with the two catches in the open position.

36 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Determine the connection points

All connections must be programmed with module and point, so in principle it does not matter where the connections are made, as long as it takes place on a correct type of input or output.

• The controller is the ﬁrst module, the next one is 2, etc.

• A point is the two or three terminals belonging to an input or output (e.g. two terminals for a sensor and three terminals for a relay).

The preparation of the connection diagram and the subsequent programming (conﬁguration) should take place at the present time. It is most easily accomplished by ﬁlling in the connection survey for the relevant modules. Principle:

Name On module On Point Function

fx Compressor 1 x x ON fx Compressor 2 x x ON fx Alarm relay x x OFF fx Main switch x x Close fx P0 x x AKS 32R 1-6 bar

The connection survey from the controller and any extension modules are uploaded from the paragraph "Module survey. E.g. controller module:

Signal Module Point Terminal

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

Signal type /

Active at

Module Point

Mind the numbering. The right-hand part of the controller module may look like a separate module. But it isn’t.

Tip The Appendix shows 80 general installation types. If your plant closely resembles one of those shown, you can use the connection points indicated for it.

- Columns 1, 2, 3 and 5 are used for the programming.

- Columns 2 and 4 are used for the connection diagram.

Example continued:

Signal Module Point Terminal

Air temperature - S3A

Air temperature- S3B

Air temperature- S3C

Air temperature - S4A

Air temperature - S4B

Air temperature - S4C

Defrost sensor - S5A

Defrost sensor - S5B

Defrost sensor - S5C

Gas temperature - S2A

Evaporator pressure - P0

AKV A

AKV B

AKV C

Fans

Defrost A

Defrost B

Defrost C

Rail heat

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 9 - 10

6 (AI 6) 11 - 12

7 (AI 7) 13 - 14

8 (AI 8) 19 - 20

9 (AI 9) 21 - 22

10 (AI 10) 23 - 24

11 (AI 11) 25 - 26

12 (DO 1) 31 - 32

13 (DO 2) 33 - 34

14 (DO 3) 35 - 36

15 (DO 4) 37 - 38

16 (DO 5) 39-40-41

17 (DO6) 42-43-44

18 (DO7) 45-46-47

19 (DO8) 48-49-50

24 -

25 -

Signal type /

Active at

Pt 1000

AKS32R-12

Signal Module Point Terminal

Gas temperature - S2B

Gas temperature - S2C

External Start/stop

Case cleaning (pulse pressure)

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 17 - 18

6 (AI 6) 19 - 20

7 (AI 7) 21 - 22

8 (AI 8) 23 - 24

Signal type /

Active at

Pt 1000

Closed

AK-CC 750A RS8HP102 © Danfoss 2018-09 37

Connection diagram

Drawings of the individual modules may be ordered from Danfoss. Format = dwg and dxf.

You may then yourself write the module number in the circle and draw the individual connections.

Example continued:

S3A

3 x EKA 163B

S3C

S4B

S3B

S4A

567 8

121314

AKV A

S4C

AKV B

S5A

AKV C

Fans

S5B

Def. A

S5C

S2A

Def.. B

Def.. C

S2B

Start/stop

S2C

Case cleaning

Rail heat

38 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Supply voltage

Supply voltage is only connected to the controller module. The supply to the other modules is transmitted via the plug between the modules. The supply must be 24 V +/-20%. One transformer must be used for each controller. The transformer must be a class II. The 24 V must not be shared by other controllers or units. The analog inputs and outputs are not galvanically separated from the supply.

The + and – 24V input must not be earthed.

If using stepper motor valves, the supply for these must be provided from a separate power supply. See AK-XM 208C.

It will also be necessary to safeguard the voltage to the controller and valves using UPS.

Example continued:

Controller module 8 VA + 1 extension module in 100-series 2 VA

------

Transformer size (least) 10 VA

Transformer size

The power consumption grows with the number of modules used:

Module Type Number á Eﬀect

Controller 1 x 8 = 8 VA Extension module 200-series _ x 5 = __ VA Extension module 100-series _ x 2 = __ VA Total ___ VA

Common pressure transmitter

AK-CC 750A RS8HP102 © Danfoss 2018-09 39

Ordering

1. Controller

Type Function Application Language Code no.

English, German, French,

AK-CC 750A Controller for evaporator control 1, 2, 3 or 4 sections

Dutch, Italian, Spanish, Portuguese, Danish, Finnish, Polish, Russian, Czech

080Z0140

2. Extension modules and survey for inputs and outputs

Type Analog

inputs

For sensors, pressure transmitters etc.

Controller 11 4 4 - - - - -

Extension modules

AK-XM 101A 8 080Z0007 x

AK-XM 102A 8 080Z0008

AK-XM 102B 8 080Z0013

AK-XM 103A 4 4 080Z0032

AK-XM 204A 8 080Z0011

AK-XM 204B 8 x 080Z0018

AK-XM 205A 8 8 080Z0010

AK-XM 205B 8 8 x 080Z0017

AK-XM 208C 8 4 080Z0023

The following extension module can be placed on the PC board in the controller module. There is only room for one module.

AK-OB 110 2 080Z0251

On/Oﬀ outputs On/oﬀ supply voltage

Relay (SPDT)

Solid state Low volt-

(DI signal)

age (max. 80 V)

High voltage (max. 260 V)

Analog outputs

0-10 V d.c. For valves

Stepper outputs

with step control

Module with switches

For override of relay outputs

Code no.

With screw terminals

continued

Example

3. AK operation and accessories

Type Function Application Code no.

Operation

AK-ST 500 Software for operation of AK controllers AK-operation 080Z0161 x

- Cable between PC and AK controller USB A - USB B (standard IT cable) - x

Accessories Power supply module 230 V / 115 V to 24 V

AK-PS 075 18 VA

AK-PS 150 36 VA 080Z0054

Accessories External display that can be connected to the controller module. For showing, say, the appliance temperature

EKA 163B Display 084B8574 xxx

EKA 164B Display with operation buttons 084B8575

MMIGRS2 Graphic display with operation 080G0294

- Cable between EKA display and controller

Accessories Communication modules for controllers where modules cannot be connected continuously

AK-CM 102 Communication module

Cable between graphic display type MMIGRS2 and controller (controller with RJ11 plug)

Supply for controller

Length = 2 m 084B7298 xxx

Length = 6 m 084B7299

Length = 1.5 m 080G0075

Length = 3 m 080G0076

Data communication for external extension modules

080Z0053 x

080Z0064

Example

continued

40 RS8HP102 © Danfoss 2018-09 AK-CC 750A

3. Mounting and wiring

This section describes how the controller:

• Is ﬁtted

• Is connected

We have decided to work on the basis of the example we went through previously, i.e. the following modules:

• AK-CC 750A controller module

• AK-XM 101A analog output module

• 3 pcs. EKA 163B display

AK-CC 750A RS8HP102 © Danfoss 2018-09 41

Mounting

Mounting of extension module on the basic module

1. Move the protective cap

Remove the protective cap from the connection plug on the right-hand side of the basic module. Place the cap on the connection plug to the right of the extension module that is to be mounted on the extreme right-hand side of the AK assembly.

2. Assemble the extension module and the basic module

The basic module must not be connected to voltage.

In our example one extension module is to be ﬁtted to the basic module. The sequence is thus:

All the subsequent settings that aﬀect the two extension modules are determined by this sequence.

When the two snap catches for the DIN rail mounting are in the open position, the module can be pushed into place on the DIN rail – regardless of where the module is on the row. Disassembly is thus done with the two snap catches in the open position.

42 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Mounting and wiring - continued

Wiring

Decide during planning which function is to be connected and where this will be.

1. Connect inputs and outputs

Here are the tables for the example:

Signal Module Point Terminal

Air temperature - S3A

Air temperature- S3B

Air temperature- S3C

Air temperature - S4A

Air temperature - S4B

Air temperature - S4C

Defrost sensor - S5A

Defrost sensor - S5B

Defrost sensor - S5C

Gas temperature - S2A

Evaporator pressure - P0

AKV A

AKV B

AKV C

Fans

Defrost A

Defrost B

Defrost C

Rail heat

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 9 - 10

6 (AI 6) 11 - 12

7 (AI 7) 13 - 14

8 (AI 8) 19 - 20

9 (AI 9) 21 - 22

10 (AI 10) 23 - 24

11 (AI 11) 25 - 26

12 (DO 1) 31 - 32

13 (DO 2) 33 - 34

14 (DO 3) 35 - 36

15 (DO 4) 37 - 38

16 (DO 5) 39-40-41

17 (DO6) 42-43-44

18 (DO7) 45-46-47

19 (DO8) 48-49-50

24 -

25 -

Signal type /

Active at

Pt 1000

AKS32R-12

The function of the switch functions can be seen in the last column.

Signal Module Point Terminal

Gas temperature - S2B

Gas temperature - S2C

External Start/stop

Case cleaning (pulse pressure)

1 (AI 1) 1 - 2

2 (AI 2) 3 - 4

3 (AI 3) 5 - 6

4 (AI 4) 7 - 8

5 (AI 5) 17 - 18

6 (AI 6) 19 - 20

7 (AI 7) 21 - 22

8 (AI 8) 23 - 24

Signal type /

Active at

Pt 1000

Closed

AK-CC 750A RS8HP102 © Danfoss 2018-09 43

Mounting and wiring - continued

The connections for the example can be seen here.

Warning Keep signal cables separate from cables with high voltage.

The screen on the pressure transmitter cables must only be connected at the end of the controller.

Case cleanng

2. Connect LON communication network

The installation of the data communication must comply with the requirements set out in document RC8AC.

3. Connect supply voltage

Is 24 V, and the supply must not be used by other controllers or devices. The terminals must not be earthed.

4. Follow light-emitting diodes

When the supply voltage is connected the controller will go through an internal check. The controller will be ready in just under one minute when the light-emitting diode ”Status” starts ﬂashing slowly.

5. When there is a network

Set the address and activate the Service Pin. When the controller is set correct on the network the LED "status" will ﬂash quickly for 10 minutes.

6. The controller is now ready to be conﬁgured.

Internal communication between the modules: Quick ﬂash = error Constantly On = error

■ Power

■ Comm

■ DO1 ■ Status

■ DO2 ■ Service Tool

■ DO3 ■ LON

■ DO4 ■ I/O Extension

■ DO5 ■ Alarm

■ DO6

■ DO7 ■ Display

■ DO8 ■ Service Pin

Status on output 1-8

Slow ﬂash = OK Quick ﬂash = answer from gateway in 10 min. after network installation Constantly ON = error Constantly OFF = error

External communication

Flash = active alarm/not acknowledged Constant ON = Active alarm/acknowledged

Network installation

44 RS8HP102 © Danfoss 2018-09 AK-CC 750A

4. Conguration and operation

This section describes how the controller:

• Is conﬁgured

• Is operated

We have decided to work on the basis of the example we went through previously, i.e. a frost appliance with 3 evaporators. The example is shown overleaf.

AK-CC 750A RS8HP102 © Danfoss 2018-09 45

Refrigerating plant example

We have decided to describe the setup by means of an example comprising a freezing appliance with 3 evaporators.

The example is the same as the one given in the "Design" section, i.e. the controller is an AK-CC 750A + extension modules.

Freezing appliance

• Refrigerant R134a

• 3 evaporators

• Electric defrost on each section

• Fans

• Rail heat

• 3 displays for monitoring of temperature in the sections

Refrigeration:

• 3 AKV valves

• Superheat measured with P0 and 3 S2-sensors

• S3 is alarm sensor

• S4 is thermostat sensor

• Night setback on 3K

Defrost:

• The defrost is stopped individually based on temperature (S5)

• Refrigeration starts when both defrosts have been accomplished

Fans:

• Operates during defrost

Cleaning:

• Pulse pressure for start and later stop of cleaning

Other:

• External start/stop used (Main switch)

There is also an internal main switch as a setting. Both must be “ON” before any adjustment is made.

The modules used are selected in the design phase.

For the example shown we use the following modules:

• AK-CC 750A controller

• AK-XM 101A analog output module

46 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Conguration

Connect PC

PC with the program “Service Tool” is connected to the controller.

The controller must be switched on ﬁrst and the LED “Status” must ﬂash before the Service Tool programme is started.

For connecting and operating the "AK service tool" software, please see the manual for the software.

The ﬁrst time the Service Tool is connected to a new version of a controller the start-up of the Service Tool will take longer than usual while information is retrieved from the controller. Time can be followed on the bar at the bottom of the display.

Start Service Tool programme

Select the name SUPV and key in the access code.

When the controller is supplied the SUPV access code is 123. When you are logged into the controller an overview of it will always appear.

(In case the overview is empty. This is because the controller has not yet been set up.) The red alarm bell at the bottom right tells you that there is an active alarm in the controller. In our case the alarm is due to the fact that the time in the controller has not yet been set.

AK-CC 750A RS8HP102 © Danfoss 2018-09 47

Conﬁguration - continued

Authorization

1. Go to Conﬁguration menu

Press the orange setup button with the spanner at the bottom of the display.

2. Select Authorization

When the controller is supplied it has been set with standard authorization for diﬀerent user interfaces. This setting should be changed and adapted to the plant. The changes can be made now or later.

You will use this button again and again whenever you want to get to this display. On the left-hand side are all the functions not shown yet. There will be more here the further into the setup we go.

Press the line Authorization to get to the user setup display.

3. Change setting for the user ‘SUPV‘

4. Select user name and access code

Mark the line with the user name SUPV.

Press the button Change

This is where you can select the supervisor for the speciﬁc system and a corresponding access code for this person.

The controller will utilize the same language that is selected in the service tool but only if the controller contains this language. If the language is not contained in the controller, the settings and readings will be shown in English.

5. Carry out a new login with the user name and the

new access code

To activate the new settings you must carry out a new login to the controller with the new user name and the relevant access code. You will access the login display by pressing the icon at the top left corner of the display.

48 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Conﬁguration - continued

Unlock the conguration of the controllers

1. Go to Conﬁguration menu

2. Select Lock/Unlock conﬁguration

3. Select Conﬁguration lock

Press the blue ﬁeld with the text Locked

The controller can only be conﬁgured when it is unlocked. It can only be adjusted when it is locked.

Changes to the input and output settings are only enabled when the controller is “Locked”

The values can be changed when it is locked, but only for those settings that do not aﬀect the conﬁguration.

In general Many settings are dependent on previous settings. This is shown by the fact that a function can only be seen (and thus set) if an earlier parent function allows access to this subordinate function

If you want to know more about the diﬀerent conﬁguration options, they are listed below. The number refers to the number and picture in the column on the left.

3Main Switch

Used to start and stop regulation. When the main switch is set to Oﬀ, all outputs are in standby mode and all alarms are cancelled. The main switch must be set to Oﬀ before the Conﬁguration lock can be Unlocked.

Conﬁguration lock

The controller can only be fully conﬁgured when the conﬁguration lock is set to Unlocked. The settings are only applied when it is set to Locked again. At this point, the controller checks the functions set and compares them with the input and output settings. Important settings can then no longer be changed unless the conﬁguration is unlocked again.

4. Select Unlocked

Select Unlocked and press OK.

For example, the “Conﬁguration lock” line will not be shown if the main switch is set to On. Only when the main switch is set to Oﬀ, and regulation has therefore been stopped, is it possible to set the conﬁguration lock.

AK-CC 750A RS8HP102 © Danfoss 2018-09 49

Conﬁguration - continued

System setup

1. Go to Conﬁguration menu

2. Select System setup

3. Set system settings

General

All system settings can be changed by pressing in the blue ﬁeld with the setting and then indicating the value of the required setting.

3Controller name

In the ﬁrst ﬁeld you enter a name for what the controller will be controlling.

Main frequency

Set frequency.

Alarm language

Select the language that alarm text should be displayed in here. Alarm text can be in a diﬀerent language to the operating language.

Clock

When the time is set the PC’s time can be transferred to the controller. When the controller is connected to a network, date and time will automatically be set by the system unit in the network. This also applies to change-over Daylight saving. Power failure, the clock will be kept running for at least 12 hours.

50 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Conﬁguration - continued

Set plant type

1. Go to Conﬁguration menu

2. Select plant type

Press the line Select plant type.

3. Set plant type

3Select pre-conﬁgured application Group 1

Or group 2

When the installation type is to be conﬁgured, it can be done in two ways: Either one of these two

In the example, we have decided to use the second method. Here we select:

• 3 evaporators

• AKV valve

• Refrigerant = R134a

• Defrost

• Defrost = electric

4. Other settings

After the selection of application we will go through the other setup displays to check whether changes will have to be made on some of the predeﬁned settings. In our example we have to select a refrigerant, (which is done on the screen shown above) and we must add external start/stop settings (which is done in the subsequent “Common functions” screen).

• Check the settings opposite the individual functions

This setting give a choice between a number of predeﬁned combinations, which at the same time determine the connection points. At the end of the manual there is an overview of the options and connection points.

After conﬁguration of this function, the controller will shut down and restart. After the restart, a large number of settings will have been made. These include the connection points. Continue with the settings and check the values. If you change some of the settings, the new values will come into force.

Number of evaporators

Select the number of evaporators that you want the controller to regulate.

Valve type

Select the relevant type of valve here. AKV valve LLSV, solenoid valve (at thermostatic expansion valve).' STEP (ETS / CCM / CCMT valve) AO (analog voltage)

Scaling factor for step valve and AO

The valve capacity can be minimized here. LLSV, Solenoid valve (at stepper valve) LLSV delay oﬀ Delay time after stepper begins to close until solenoid valve closes.

Refrigerant

Here you can select from a range of pre-deﬁned refrigerants. If you cannot ﬁnd the refrigerant you want in the list, select “User-deﬁned”. You can then set 3 constants which represent the refrigerant. You can obtain these 3 constants from Danfoss.

Defrost control

Select whether you want the evaporators to regulate with defrost.

Defrost type

You can select either natural defrost or electrical defrost, hotgas defrost or warm brine defrost.

AK-CC 750A RS8HP102 © Danfoss 2018-09 51

Conﬁguration - continued

Denition of thermostat

1. Go to Conﬁguration menu

2. Select Common control

3. Select functions for thermostat

The setup menu has now changed. It now shows more settings all of which are based on the selected

plant type. For example, earlier we selected 3 evaporators. This means that 3 sections are now displayed.

In our example we select:

• On/oﬀ thermostat

• Individual thermostat on each section

• Night setback

• No melt function, as this is a frost appliance

The settings are shown here in the display.

Depending on your settings, further settings may then be available for the selected functions. This list in the right-hand column contains all the possible functions that may be made available in one way or another.

If you want to know more about the individual functions than the brief description below, you will ﬁnd additional information in Chapter 5 of the manual.

3 Thermostat type

Choose from the following thermostat functions:

• 1 valve for all /common ON-OFF thermostat Here, only one valve is used for all evaporators. The temperature is controlled by an ON/OFF thermostat on the basis of the settings in the A section.

• 1 valve per evap/ common ON/OFF thermostat Here, one valve per evaporator is used. The temperature is controlled in all evaporator sections by an ON/OFF thermostat on the basis of the settings in the A section.

• 1 valve per evaporator / individual ON/OFF thermostat Here, one valve per evaporator is used. The temperature is controlled individual by ON/OFF in each evaporator section.

• 1 valve per evaporator /individual modulating thermostat

Here, one valve per evaporator is used. The temperature is controlled individually in each evaporator section according to a modulating principle

External reference via voltage

Select whether to use an external voltage signal for displacement of the thermostat reference. Oﬀset at max. signal Oﬀset value at max. signal (5 or 10V). Oﬀset at min. signal Oﬀset value at min. signal (0,1 or 2V).

Day/ night control

Select whether the thermostat temperature is raised for night operation (Night oﬀset values must be set in the individual sections and in Kelvin)

Night displacement via DI

Select whether night displacement is to take place with an input signal. (Alternatively, the signal can be generated from the internal weekly schedule or from the system administrator via data communication.)

Thermostat band

Select whether you want the thermostat to switch between two reference settings (the values can be set in the individual sections) Select whether the switch should be initialised by pulse pressure or by a switch.

Thermostat band select via DI

Select whether the reference is to be made with a signal on a DI input.

Melt function

Select whether you want the controller to perform a melting function

Melt interval

Set the time period between two melting intervals Melt time Set the melting time

Flood Evap

Choose from the following functions:

• Disconnected. Liquid ﬂow is not permitted

• Liquid ﬂow SH only. Stopped by a signal from the system device.

• Liquid ﬂow Common DI. Stopped by a common DI signal

52 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Conﬁguration - continued

3 -

Denition of sections

1. Go to Conﬁguration menu

2. Select Section A

3. Set values for thermostat A

Press the +-button to go on to the

4. Set values for alarm thermostat

5. Deﬁne the other sections

Example: The settings are shown here in the display.

There are several pages, one after the other. The black bar in this ﬁeld tells you which of the pages is currently displayed. Move between the pages using the + and - buttons.

Repeat the steps above for each section.

In our example, the settings are the same for all 3 sections.

Stepper valve

ETS 12½, 25, 50, 100, 250, 400, CCM, CCMT or User selection. At User selection: + Max operating steps, Hysterese, Step rate, Holding current, Overdrive init, Phase current, Soft landing unit, Failsafe pos.

Thermostat temperature

In the case of a common thermostat: Choose which sensors are to be included in temperature regulation: Weighted S3A-S4A, lowest of all S3s, average of all S3s, highest of all S3s, lowest of all S4s, average of all S4s or highest of all S4s.

Air temperature S4 Day

Sensor selection for the thermostat during day operation At 100%, only S4 is used. At a lower value, S3 is also used in the thermostat function. At 0%, only S3 is used in the thermostat function.

Air temperature S4 Night

As above, but for night operation

Cutout 1

The thermostat’s cutout temperature - Thermostat band 1

Diﬀerential 1

Diﬀerential on regulation according to Thermostat band 1

Cutout 2

The thermostat’s cutout temperature - Thermostat band 2

Diﬀerential 2

Diﬀerential on regulation according to Thermostat band 2

Night setback

Displacement of the reference during night operation

Display control

Select whether you want to connect to display type EKA 163B / EKA 164B to indicate the appliance temperature for section A. Settings are: non, weighted S3/S4 or product temperature sensor.

Display unit

Select whether you want temperatures and pressure displayed in SI units (°C) or US units (°F)

Display S4 %

Sensor selection for the temperature shown on the display At 100%, only S4 is used. At a lower value, S3 is also used. At 0%, only S3 is displayed.

Display Oﬀset

Any oﬀset for the display readout

Max. Disp -d- delay

Max. duration of -d- in display.

S4 Frost protection

Select whether an alarm is triggered in the case of low S4 temperature

S4 Frost limit

Set the alarm level for the S4 sensor.

4Alarm thermostat

Select whether you want to activate the alarm thermostat

Alarm air S4%

Set the weighting of the S4 sensor for the alarm thermostat

High alarm limit 1

Alarm limit for high temperature alarm, thermostat band 1

High alarm limit 2

Alarm limit for high temperature alarm, thermostat band 2

High delay

Time delay for a high temperature alarm

High delay pulldown

Time delay during pull-down and after defrost

Low alarm limit 1

Alarm limit for a low temperature alarm, thermostat band 1

Low alarm limit 2

Alarm limit for a low temperature alarm, thermostat band 2

Low delay

Time delay for a low temperature alarm

Product sensor

Indicate whether a product sensor is used

High alarm limit 1

Alarm limit for high product temperature, thermostat band 1

High alarm limit 2

Alarm limit for high product temperature, thermostat band 2

High delay

Time delay for a high product temperature alarm

High delay pulldown

Time delay during pull-down and after defrost

Low alarm limit 1

Alarm limit for a low product temperature, band 1

Low alarm limit 2

Alarm limit for a low product temperature, band 2

Low delay

Time delay for a low product temperature alarm

AK-CC 750A RS8HP102 © Danfoss 2018-09 53

Conﬁguration - continued

Denition of defrost functions

1. Go to Conﬁguration menu

2. Select Defrost function

3. Set functions

Example: The settings are shown here in the display.

If the controller’s internal defrost schedule is used to start defrost, the start times must be set using the everyday user interface. See page 65.

Note! If the injection is controlled with a analog signal to a 3rd party valve the setting "Adaptive defrost" is not recommended.

3 Defrost control

Select whether you want the controller to control defrost.

Defrost type

Choose a defrost method (electric / natural / hot gas or warm brine)

Adaptive defrost

The function can be set to: "Not used"/"Monitor ice"/"Permit cancellation of defrost for day (Skip day)"/"Skip day/ night"/"Full adaptive defrost".

Min. time between defrosts

Set how often defrosting is allowed.

Pc signal for AD (Adaptive defrost)

Choose which signal is to be followed: an internal signal (Local) or a signal via data communications (Network).

Defrost schedule

Choose which schedule is to be followed: an internal schedule or an external schedule from the system unit

Defrost start via DI

Select whether defrost should start when a signal is received on a DI input

Max. defrost interval between defrosts

Defrost is started at the set interval if it is not started using other methods (manual start, weekly schedule, network, DI). If defrost is started using a schedule, “Max. interval” should be set to a value greater than the longest period between two defrosts in the schedule.

Fan run during defrost

Specify whether the fans should be on during defrost.

Defrost stop method

Deﬁne whether defrost is to be concluded with:

• Time, Temperature individual in each section or Temperature common for all sections

Defrost term sensor

Select the sensor that you want to give the signal for defrost stop

Stop temperature A, B, C, D

Set the temperature at which defrost should stop

Max. defrost time

Defrost will stop after this period, even if the defrost temperature has not been reached

Min. defrost time

Defrosting cannot be stopped until the set time has expired. The setting has higher priority than "Max. defrost time"

Pump down delay

Time delay before defrost when the ﬂuid injection stops and the evaporator is emptied of liquid

Hot gas delay

Delay time before opening of hot gas valve

Drip oﬀ delay

Time delay after defrost to allow water droplets to drip oﬀ the evaporator before refrigeration is restarted

Drain delay

Delay in which the drain valve is kept open in order to ensure pressure equalisation

Fan delay

Maximum permitted fan delay following defrost

Fan start temperature

The fans will start when the temperature at the defrost sensor falls below this value.

Drip tray heater

Set whether there is to be heating in the drip tray

Drip tray heater delay

Set heating time (time from the point at which defrost stops )

Max. Hold time

Maximum hold time that the controller will wait for the signal to restart refrigeration (used with coordinated defrost)

Show advanced adaptive defrost

All settings for this function are expert settings.

54 RS8HP102 © Danfoss 2018-09 AK-CC 750A

Conﬁguration - continued

Denition of common functions

1. Go to Conﬁguration menu

2. Select Common functions

3. Set functions in the ﬁrst display

Press the +-button to go on to the

4. Set the functions in another display

Example: The settings are shown here in the display.

3Common functions for fans and rail heat

Fan control

Select required fan control:

• Single fan (one relay)

• two speed fan (two relais)

• EC fan (analogue voltage output)

• VSD fan (analogue voltage output + one start relay)

Fan pulsing at cutout

Select whether you want the fans to pulse during the thermostat’s cutout period. Pulsing can be restricted to either: “night operation only” (appliance with night cover) or “both day and night operation” (cold storage room)

Fan eco during thermostat cutout

Select when the fans should run on low speed:

• Never

• Both day and night

• Night only Fan ON % (at single fan) Set how long the fans should be ON during pulsing. Enter as a percentage of the pulse period. Fan duty cycle (at single fan) Set the fan’s operation period for pulsing Fan day (at EC or VSD) Fan speed during normal day operation Fan night (at EC or VSD) Fan speed during normal night operation Fan day eco (at EC or VSD) Fan speed during day operation and thermostat cutoutFan night eco (at EC or VSD) Fan speed during night operation and thermostat cutout EC min start speed (at EC or VSD) Lowest speed the ﬁrst 10 seconds after start

Fan stop on S5

Select whether the fans should stop if the S5A temperature is too high. Used to stop the fans if refrigeration is not working.

Fan stop temp.

Set the temperature limit for the S5A sensor at which the fans stop

Rail heat control

Select whether to use pulsing/rail heat control. Non/Timer or Dew point.

Rail ON at day

Set how long the rail heat should be ON for during day operation. Enter as a percentage of the rail heat pulse period

Rail heat at night

Set how long the rail heat should be ON for during night operation. Enter as a percentage of the rail heat pulse period.

Dew point max. limit

At a dew point above this value, rail heat is 100%.

Dew point min limit

At a dew point below this value, rail heat is controlled with the next setting "Min ON".

Rail heat Min ON%

Period in which the dew point is below the min. limit.

Rail heat cycle time

Rail heat pulse period.

Rail heat during defrost

Select whether you want the rail heat to be OFF during defrost.

4Common functions for compressor and case cleaning

Compressor control

Select whether you want to use compressor control

Min. ON time

Set the minimum runtime for the compressor once it has started

Min. Restart time

Set the minimum time between the compressor stopping

Press the +-button to go on to the

and restarting

Runtime total

Set any runtime for the compressor

Case cleaning

Select whether you want an case cleaning function

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Conﬁguration - continued

5. Set the functions in the third display

Example: The settings are shown here in the display.

Case cleaning via DI

Select whether to use a digital input to activate the case cleaning function. Alternatively the case cleaning function can be activated from the display or using a parameter setting

Defrost at case cleaning

Select whether to activate the case cleaning function with a defrost sequence. Used for frost appliances to achieve fast defrost of the appliance before cleaning.

Appliance shutdown

Select function for light and fans when appliance shut down 5Common functions for door, light etc.

Door switch mode

Select the function of any door switch. The door switch can be used in one of the following two ways:

• Alarm only, if the door has been left open for too long

• Stop refrigeration and fans when the door is open, along with an alarm if the door has been left open for too long

Light oﬀ delay

Set how long the light should remain on after the door has been closed (requires a light control to be set up and controlled via the door switch)

Restart refrig. delay

Set how long the door may be open before refrigeration and fans are restarted. Prevents exposure of the products to too high a temperature if someone forgets to close the door.

Door alarm delay

If the door has been open for more than the time delay set here, a door alarm is triggered

Light control

Select whether the light should be controlled by a door switch, a day/night signal or by a signal via data communication

Light at Main SW = Oﬀ

Choose whether the light is to be switched oﬀ when the main switch is set to oﬀ, or if the light is to follow the standard light control.

Control of Blinds control

Set whether the blinds are to be controlled by a relay.

Open/close blinds via DI

Set whether the controller is to receive a signal which activates the blinds. This must be a pulse signal.

Fan stop during close night blinds

Set the number of seconds the fans must be switched oﬀ.

Refrigerant leak

A DI input is reserved for the refrigerant alarm

Alarm delay

Time delay before alarm is transmitted

Forced closing via DI

Select whether a digital input is used for the forced closing of injection

Fan at forced closing

Select whether or not you want the fans to operate during forced closing and whether defrosting is to be permitted during this period.

Alarm relay

Select the alarm relay function. The alarm relay must be activated by alarm priorities:

• low to high

• low to medium

• high

The alarm relay can be activated either by all alarm priorities from low to high or only by high priority alarms

Ext. main switch

Select whether you want a main switch via a digital input. When the main switch is set to Oﬀ, all regulation is stopped, all outputs are set to standby and all alarms are cancelled.

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Conﬁguration - continued

Setup general alarm inputs

1. Go to Conﬁguration menu

2. Select General alarm inputs

3. Deﬁne the required alarm functions

In our example we are not using this function so the image is more for information purposes. The name of the function can be xx and the alarm text can be entered further down the screen).

3 - General alarm input

This function can be used to monitor all kinds of digital signals.

No. of inputs

Set the number of digital alarm inputs

Adjust for each input

• Name

• Delay time for DI alarm

• Alarm text

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Conﬁguration - continued

Setup separate thermostat functions

1. Go to Conﬁguration menu

2. Select Thermostats

3. Deﬁne the required thermostat function

In our example we are not using this function so the image is more for information purposes. The name of the function can be xx and the alarm text can be entered further down the screen).

3 - Thermostats

The general thermostats can be used to monitor the temperature sensors that are used in the control, as well as 4 extra temperature sensors. Each thermostat has a separate outlet to control external automation.

No. of thermostats

Set the number of general thermostats. (1-5) For each thermostat adjust

• Name

• Which of the sensors is used Actual temp. Temperature measurement on the sensor that is attached to the thermostat

Actual state

Actual status on the thermostat outlet

Cut out temp.

Cut-out value for the thermostat

Cut in temp.

Cut-in value for the thermostat

High alarm limit

Alarm delay high

Time delay for high alarm

Alarm text high

Indicate alarm text for the high alarm

Low alarm limit

Alarm delay low

Time delay for low alarm

Alarm text low

Indicate alarm text for low alarm

Via the +- button you can move to similar settings for the pressure control functions. (Not used in the example)

3b - Pressostats

There are equal settings for up to 5 pressostat functions

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Conﬁguration - continued

Setup separate voltage functions

1. Go to Conﬁguration menu

2. Select General Voltage inputs

3. Deﬁne the required names

and values attached to the signal

In our example we are not using this function so the image is more for information purposes. The name of the function can be xx and the alarm text can be entered further down the screen). The values ”Min. and Max. Readout” are your settings representing the lower and upper values of the voltage range. 2V and 10V, for example. (The voltage range is selected during the I/O setup).

For each voltage input deﬁned the controller will reserve a relay output in the I/O setup. It is not necessary to deﬁne this relay if all you require is an alarm message via the data communication.

3 - Voltage inputs

The general volt inlet can be used to monitor external voltage signals. Each volt inlet has a separate outlet to control external automatic controls.

No. of voltage inp.

Set the number of general voltage inputs, specify 1-5:

Name Actual value

= read-out of the measurement

Actual state

= read-out of outlet status Min. readout State read-out values at minimum voltage signal

Max. readout

State read-out values at maximum voltage signal

Cutout

Cut-out value for outlet (scaled value)

Cutin

Cut-in value for outlet (scaled value)

Cutout delay

Time delay for cut-out

Cut in delay

Time delay for cut-in

Limit alarm high

High alarm limit

Alarm delay high

Time delay for high alarm Alarm text high Set alarm text for high alarm Limit alarm low Low alarm limit

Alarm delay low

Time delay for low alarm Alarm text low Indicate alarm text for low alarm

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Conﬁguration - continued

Conguration of inputs and outputs

1. Go to Conﬁguration menu

2. Select I/O conﬁguration

The following displays will depend on the earlier deﬁnitions. The displays will show which connections the earlier settings will require. The tables are the same as shown earlier.

• Digital outputs

• Digital inputs

• Analog outputs

• Analog inputs

Important! An AKV function can only be set for module 1 and only for points 12, 13, 14 and 15

3. Conﬁguration of Digital outputs

Press the +-button to go on to the

4. Setup On/oﬀ input functions

Press the +-button to go on to the

Load Output

AKV A DO1 1 12 -

AKV B DO2 1 13 -

AKV C DO3 1 14 -

Fan DO4 1 15 ON

Defrost A

Defrost B

Defrost C DO7 1 18 ON

Rail heat DO8 1 19 ON

We set up the controller’s digital outputs by keying in which module and point on this module each one of these has been connected to.

We furthermore select for each output whether the load is to be active when the output is in pos. ON or OFF.

Function Input

External start/stop AI3 2 3 Closed

Case cleaning (pulse pressure)

We set up the controller’s digital input functions by keying in which module and point on this module each one of these has been connected to. We furthermore select for each output whether the function is to be active when the output is in pos. Closed or Open.

DO5 1 16 ON

DO6 1 17 ON

AI4 2 4 Closed

Module

Point Active at

3 - Outputs

The possible functions are the following: AKV or solenoid valve LLSV_ (Solenoid valve) Defrost (el/hot gas) Common defrost Suction line valve Drain valve Drip tray heat Night blind Compressor Rail heat Light Fan Alarm Thermostat 1 - 5 Pressostat 1 - 5 Voltage input 1 - 5

4 - Digital inputs

The possible functions are the following: Night displacement Door alarm Forced closing Ext. Main switch Thermostat band Defrost start Case cleaning Appliance shutdown Open / close Night blinds DI alarm input 1-10 Refrigerant alarm (CO2)

Analog output

(settings are not shown) The possible signals are as follow: 0 – 10 V 2 – 10 V 0 – 5 V 1 – 5V The type of Step valve deﬁned in earlier sectons.

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Conﬁguration - continued

5. Conﬁguration of Analog Input signals

Sensor Input Module Point Type

Air temperature S3 A AI1 1 1 Pt 1000

Air temperature S3 B AI2 1 2 Pt 1000

Air temperature S3 C AI3 1 3 Pt 1000

Air temperature S4 A AI4 1 4 Pt 1000

Air temperature S4 B AI5 1 5 Pt 1000

Air temperature S4 C AI6 1 6 Pt 1000

Defrost sensor S5 A AI7 1 7 Pt 1000

Defrost sensor S5 B AI8 1 8 Pt 1000

Defrost sensor S5 C AI9 1 9 Pt 1000

Gas temperature -S2 A AI10 1 10 Pt 1000

Evaporating pressure - P0 AI11 1 11 AKS32R-12

Gas temperature -S2 B AI1 2 1 Pt 1000

Gas temperature -S2 C AI2 2 2 Pt 1000

We set up the analog inputs for the sensors.

5 - Analog inputs

The possible signals are the following:

Temperature sensors: S2 Evaporating temp. (A,B,C,D) S3 Air temp. before evaporator (A,B,C,D) S4 Air temp. after evaporator (A,B,C,D) S5-1 Defrost sensor (A,B,C,D) S5-2 Defrost sensor (A,B,C,D) Saux 1 - 4 Product temperature (A,B,C,D) Setting:

• Pt1000

• PTC 1000

Pressure transmitters:

P0 evaporator pressure Pc Cond. pressure Paux 1 - 3 Setting:

• AKS 32, -1 – 6 Bar

• AKS 32R, -1 – 6 Bar

• AKS 32, - 1 – 9 Bar

• AKS 32R, -1 – 9 Bar3

• AKS 32, - 1 – 12 Bar

• AKS 32R, -1 – 12 Bar

• AKS 32, - 1 – 20 Bar

• AKS 32R, -1 – 20 Bar

• AKS 32, - 1 – 34 Bar

• AKS 32R, -1 – 34 Bar

• AKS 32, - 1 – 50 Bar

• AKS 32R, -1 – 50 Bar

• AKS 2050, 1 – 59 Bar

• AKS 2050, -1 – 99 bar

• AKS 2050, -1 – 159 bar

• MBS 8250, -1 – 159 Bar

Voltage signals for reference displacement:

Ext. Ref. Signal General voltage inputs 1 - 5 Setting:

• 0 - 5 V,

• 1 - 5 V,

• 0 -10 V,

• 2 - 10 V

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Conﬁguration - continued

Set alarm priorities

1. Go to Conﬁguration menu

2. Select Alarm priorities

Very many functions have an alarm connected. Your choice of functions and settings has connected all the relevant alarms that are current. They will be shown with text in the three pictures. All alarms that can occur can be set for a given order of priority:

• ”High” is the most important one

• ”Log only” has lowest priority

• ”Disconnected” gives no action The interdependence between setting and action can be seen in the table.

3. Set priorities for Temperature alarms

Press the +-button to go on to the next page

Setting

High X X X X 1

Medium X X X 2

Low X X X 3

Log only X 4

Disconnected

In our example we select the settings shown here in the display

Log Alarm relay selection Net-

Non High Low - High

work

AKM dest.

4. Set Alarm priorities for sensor error

In our example we select the settings shown here in the display

Press the +-button to go on to the next page

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Conﬁguration - continued

5. Set Alarm priorities for "Various alarms"

Press the +-button to go on to the next page

6. Set Alarm priorities for General functions

In our example we select the settings shown here in the display

There are no general alarms in our example.

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Conﬁguration - continued

Lock conguration

1. Go to Conﬁguration menu

2. Select Lock/Unlock conﬁguration

3. Lock Conﬁguration

Press in the ﬁeld against Conﬁguration lock.

Select Locked.

The controller will now make a comparison of selected functions and deﬁne inputs and outputs. The result can be seen in the next section where the setup is controlled.

The setup of the controller has now been locked. If you subsequently want to make any changes in the controller’s setup, remember ﬁrst to

unlock the conﬁguration.

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Conﬁguration - continued

Check conguration

1. Go to Conﬁguration menu

2. Select I/O conﬁguration

3. Check conﬁguration of Digital Outputs

Press the +-button to go on to the next page

4. Check conﬁguration of Digital Inputs

This control requires that the setup is locked

(Only when the setup is locked are all settings for in- and outputs activated.)

An error has occurred, if you see the following:

The setup of the digital outputs appears as it is supposed to according to the wiring made.

A 0 – 0 next to a deﬁned function. If a setting has reverted to 0-0, you must control the setup again. This may be due to the following:

• A selection has been made of a combination of module number and point number that does not exist.

• The selected point number on the selected module had been set up for something diﬀerent.

The error is corrected by setting up the output correctly.

Remember that the setup must be unlocked before you can change module and point numbers..

Press the +-button to go on to the next page

5. Check conﬁguration of Analog Outputs

The setup of the digital inputs appears as it is supposed to according to the wiring made.

(In our example we do not use the analoge outputs)

The setup of the Analog inputs appears as it is supposed to according to the wiring made.

The settings are shown on a RED background. If a setting has turned red, you must control the setup again. This may be due to the following:

• The input or the output has been set up; but the setup has later been changed so that it should no longer be applied.

The problem is corrected by setting module

number to 0 and point number to 0.

Remember that the setup must be unlocked before you can change module and point numbers.

AK-CC 750A RS8HP102 © Danfoss 2018-09 65

Check of connections

1. Go to Conﬁguration menu

2. Select I/O status and manual

Before the control is started we check that all inputs and outputs have been connected as expected.

This controls requires that the setup is locked

3. Check Digital Outputs

Press the +-button to go on to the next page

4. Check Digital Inputs

By means of the manual control of each output it can be checked whether the output has been correctly connected.

AUTO The output is controlled by the controller

MAN OFF The output is forced to pos. OFF

MAN ON The output is forced to pos ON

Activate the various functions (the door switch and the main switch).

Check that the controller registers the activation – i.e. whether the ON/

OFF value is changed in the last column. Check the other digital inputs in the same way.

(In our example we do not use the analoge outputs)

Press the +-button to go on to the next page

5. Check Analog inputs

Check that all sensors show sensible values.

In our case we have no value. This may be due to the following:

• The sensor has not been connected.

• The sensor is short-circuited/interrupted

• The point or module number has not been set up correctly.

• The conﬁguration is not locked.

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Check of settings

1. Go to the overview

2. Select evaporator A

Before the control starts, we check that all the settings are as they should be.

The overview display will now show one line for each of the general functions. Behind each icon there is a number of displays with the diﬀerent settings. It is all these settings that have to be checked.

3. Settings for thermostat

4. Move on with the next display for the section. Here the alarm thermostat

Press the blue overview button at the bottom left of the display.

5. Settings for alarm thermostat

Remember the settings at the bottom of the pages – the ones that can

only be seen via the ”Scroll bar”.

Page 2 shows a summary of the temperature sequence over the past 24 hours.

Remember the settings at the bottom of the pages – the ones that can

only be seen via the ”Scroll bar”.”

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Check of settings - continued

6. Move on with the next display for the section. Here the expansion valve function

Press the blue overview button at the bottom left of the dis-

play..

7. Settings for the injection function

Remember the settings at the bottom of the pages – the ones that can only be seen via the ”Scroll bar”.

8. Repeat for Evaporator B and later again for C

9. Go to defrost display

Press the blue overview button at the bottom left of the display and then press the defrost symbol

10. Settings for defrost

The settings can be reviewed in the same way as for section A.

Remember the settings at the bottom of the pages – the ones that can only be seen via the ”Scroll bar”.

11. Go to defrost schedule

Press the schedule button to continue to the defrost schedule

12. Setup defrost schedule

13. Press a weekday and set the times for the various defrost

starts.

Use the copying functions if there are several days with identical defrosts.

In our example, the defrost schedule is set to defrost twice a day.

The end result with two defrosts per 24 hours can be seen here

above.

14. Go to common functions

Press the blue overview button at the bottom left of the display

and then on common functions

15. The settings for the common functions

Go through the individual functions.

16. The controller setup has been completed.

Installation in network

1. Set the address (here, for example 3)

Turn the right-hand address switch so that the arrow will point at 3. The arrow of the two other address switches must point at 0.

2. Push the Service Pin

Press down the service pin and keep it down until the Service Pin LED lights up.

The controller has to be remote-monitored via a network. In this net-

work we assign address number 3 to the controller.

The same address must not be used by more than one controller in the

same network.

Requirement to the system unit

The system unit must be a gateway type AKA 245 with software version

6.0 or higher. It is capable of handling up to 119 AK controllers. Alternatively, it can be an AK-SM 720. It is capable of handling up to 200 AK controllers.

3. Wait for answer from the system unit

Depending on the size of the network it may be up to one minute before the controller receives an answer as to whether it has been installed in the network. When it has been installed the Status LED will start to ﬂash faster than normal (once every half second). It will continue with this for about 10 minutes

4. Carry out new login via Service Tool

If the Service Tool was connected to the controller while you installed it in the network, you must carry out a new login to the controller via the Service Tool.

If there is no answer from the system unit

If the Status LED does not start ﬂashing faster than normal, the controller has not been installed in the network. The reason for this may be one of the following:

The controller has been assigned an address out of range

Address 0 cannot be used.

If the system unit in the network is an AKA 243B Gateway only the addresses between 1 and 10 can be used.

The selected address is already being used by another controller or unit in the network:

The address setting must be changed to another (vacant) address.

The wiring has not been carried out correctly. The termination has not been carried out correctly.

The data communication requirements are described in the document: ”Data communication connections to ADAP-KOOL® Refrigeration Controls” RC8AC.

First start of control

Check alarms

1. Go to the overview

Press the blue overview button at the bottom left of the display.

2. Go to the Alarm list

Press the blue button with the alarm bell at the bottom of the display.

3. Check active alarms

In our case, we have a series of alarms. We will tidy them up so that we only have those that are relevant.

4. Remove cancelled alarm from the alarm list

Press the red cross to remove cancelled alarms from the alarm list.

5. Check active alarm again

In our case an active alarm remains because the control has stopped. This alarm must be active when control has not started. We are now ready for the startup of control.

Please note that active plant alarms are automatically cancelled when the main switch is in pos. OFF. If active alarms appear when the control is started the reason for these should be found and remedied.

First start of control - continued

Start the control

1. Go to Start/Stop display

Press the blue manual control button at the bottom of the display.

2. Start control

Press in the ﬁeld against Main switch. Select ON.

The controller will now start the controlling when the external function switch is also activated to ON.

If you wish to start an extra defrost cycle, it can be done via this display and also from the defrost screen.

Setup logs

1. Go to the overview

Press the blue overview button with the log symbol.

2. Log display

3. New logs

The top line gives access to deﬁnition of new logs and to changes of already established logs. The next line enables you to see a selection of the deﬁned logs

Here is the start display for new logs Start by deﬁning which type of log has to be deﬁned

Here it is determined which parameters have to be included in the setup of data. Select a function here, then a parameter, and ﬁnish with OK.

Press hereafter "Arrow right"

Here is the survey of all the parameters that are collected in

the log.

If a parameter has to be removed from the log collection, you

must select the parameter and then press "Arrow left".

A LOG CAN ONLY BE DISPLAYED IF:

• THE CLOCK HAS BEEN SET AND

• THE CONFIGURATION IS LOCKED

Manual defrost

1. Go to Conﬁguration menu

2. Select defrost

3. Start defrost

If you want to carry out manual defrost, proceed as follows.

Activate

5. Regulating functions

This section describes how the diﬀerent functions work

Introduction

Application

AK-CC 750A controllers are complete regulating units which together with valves and sensors constitute complete evaporator controls for refrigeration appliances and freezing rooms within commercial refrigeration. Generally speaking they replace all other automatic controls containing, inter alia, day and night thermostats, defrost, fan control, rail heat control, alarm functions, light control, etc. The controller is equipped with data communication and is operated via a PC. In addition to evaporator control the controller can give signals to other controllers about the operating condition, e.g. forced closing of expansion valves, alarm signals and alarm messages..

Examples

The controller has been designed to control one of the following four plant types. Through the programming you determine which one.

Evaporator control of one, two, three or four evaporators

(ETS)

Control of cool or defrost room

Among the diﬀerent functions can brieﬂy be mentioned:

• Control of up to four evaporator sections

• Electronic injection with AKV or stepper valve

• ON/OFF or modulating temperature control

• Weighted thermostat and alarm thermostat

• Defrost on demand based on evaporator capacity

• Appliance cleaning function

• Appliance shutdown via data communication

(The functions may not be mixed across the various sections of the evaporator.)

The complete survey of controllers and functions can be seen in the manual chapter 2 in section "Design o a evaporator control".

Control of cool or defrost appliance

• The refrigerant is either regulated by means of:

- expansion valve type AKV/stepper or

- solenoid valve and thermostatic expansion valve

ermostat function

Valve type and thermostat

Principle

Up to 4 valves can be connected to the controller; one for every solid state output. It is possible to use electrically controlled expansion valves type AKV (ETS) for regulation, or else injection can take place using thermostatic expansion valves (TEV) in which the temperature is regulated using solenoid valves in the liquid line (LLSV), e.g. Danfoss type EVR.

(ETS)

The thermostat function can be deﬁned in diﬀerent ways depending on which application it is used for. For example:

• regulation principle /

• what sensors are to be used /

• whether the user wishes to toggle between two temperature settings, etc. It is necessary for at least one air sensor to be ﬁtted for every evaporator section. This is applicable irrespective of which thermostat function is selected – including "no" thermostat. The thermostat's cut-out temperature also has to be set to the correct air temperature as this value is used by the injection function.

The thermostat can control the temperature via:

• a signal from the S3/S4 sensors in section A, or

• min/max or average temperatures in all the sections used (see the section on sensor selection)

AKV valve This principle can also be used with electronic expansion valves type AKV; e.g. refrigeration appliances where one valve is used for two evaporators. These appliances are specially designed for this application as the evaporator area is divided over two refrigeration sections in order to achieve a consistent load over the two circuits.

One valve for every evaporator + common ON/OFF thermostat Here, one valve is used per evaporator and the temperature is controlled according to the ON/OFF principle in accordance with the thermostat settings in section A

Thermostat type= ON/OFF

One common valve for all evaporators + common ON/OFF thermostat A line up of refrigeration appliances which are to be regulated to the same temperature is a typical example. The temperature is controlled according to the ON/OFF principle in accordance with the thermostat settings in section A.

The thermostat can control the temperature via:

• a signal from the S3/S4 sensors in section A, or

• min/max or average temperatures in all the sections used (see the section on sensor selection)

One valve for every evaporator + individual ON/OFF thermostat Here, one valve is used per evaporator and the temperature is controlled individually in each evaporator section according to the ON/OFF principle.

The thermostat in every section controls the temperature via the S3/S4 sensors in every section (where appropriate, see the section on sensor selection).

The thermostat in each section controls the temperature via the

S3/S4 sensors in each section.

During cooling and in the case of major load variations in which the temperature falls outside of the thermostat limits, injection is regulated so that the evaporator operates with the minimum possible stable superheating. This ensures that the cooling process takes place as quickly as possible.

In the case of stable loads, the thermostat will reduce the opening time for the AKV valve, so the through ﬂow of refrigerant is restricted to precisely the amount that is required to maintain the temperature at the required reference (area control).

The reference temperature will be the set cut-out temperature + half the diﬀerence.

The cut-out temperature and diﬀerence are set as in the case of a standard On/Oﬀ thermostat. The diﬀerence should not be set to less than 2K. (In the case of a smaller diﬀerence, load changes could interfere with the modulating thermostat function.)

One solenoid valve for each evaporator + modulating thermostat

Here, one valve is used per evaporator and the temperature is controlled individually in each evaporator section according to the modulating thermostat principle.

Thermostat type = Modulating

Modulating temperature regulation maintains a more constant temperature and also equalises the load on the system so that the compressors have better operating conditions.

• This function can only be used on:

- central systems with AKV valves

- central systems with solenoid valves

- brine systems with solenoid valves.

• Each of the individual evaporator sections is controlled individually using a modulating thermostat function.

• Cut-out value and diﬀerence must be set as with an ON/OFF thermostat.

One AKV valve for each evaporator + modulating thermostat Here, one valve is used per evaporator and the temperature is controlled individually in each evaporator section according to the modulating thermostat principle.

With solenoid valves, a pulse modulating principle is used with an adjustable period. The valve is opened and closed within a period (e.g. 5 minutes). A PI controller calculates how long the valve needs to be open in order to maintain the most constant temperature.

The reference temperature will be the set cut-out temperature + half the diﬀerence.

The current load on the appliance can be read oﬀ in the form of the valve's opening time as a percentage of the set period.

Desynchronisation of valve openings

To achieve even loading on the compressors, a desynchronising function has been built in which ensures that the times for solenoid valve opening are displaced.

Within the same controller If several valves are used on the same controller, the opening times are displaced in relation to one another. For example, if two valves are used, the opening of these is displaced in relation to one another by half a period.

Between controller Displacement of the opening of the solenoid valves takes place on the basis of the controllers' address settings. If a period time of 300 seconds (factory default) is used, the opening of the solenoid valves for the A section will be displaced by 15 seconds x last digit in the address setting, e.g.: Addresses 0, 10, 20: are shifted by 0 seconds Addresses 1, 11, 21: are shifted by 15 seconds, etc.

This desynchronisation between controller takes place during start-up and once a day at around midnight, 00:00

Address / Section

10 / A

10 / B

If AKV (stepper) valves are used, at least one sensor must always be used in every section, irrespective of the choice of thermostat function. This measurement is used by the injection function for the superheat controller.

Common thermostat

When a common thermostat is used, the thermostat settings in section A are used to control the air temperature.

The thermostat temperature can be either a weighting of the S3 and S4 sensors in section A, as described for the individual thermostat. This will typically be used in cold storage rooms and freezer rooms in which several evaporators are controlled according to a common temperature.

11 / A

11 / B

12 / A

12 / B

22 / A

22 / B

Thermostat sensor

Individual thermostat

When individual thermostat control is used in every section, the temperature is controlled on the basis of the air temperature sensors S3, S4 or both.

Alternatively, the thermostat temperature can be a minimum value, a maximum value or an average value of all S3 or S4 sensors for the refrigeration sections used. This will typically be used where one solenoid valve is used for several appliance sections and where it is necessary to ensure that the thermostat is taking into account the temperature in all sections.

Min. S4 / Max. S4 / S4 average

Min. S3 / Max. S3 / S3 average

Deﬁnition of the thermostat temperature takes place using one setting, which is based on the S4 value. With a setting of 100%, only the S4 measurement will be used. With a setting of 0%, only S3 will be used. With a value between 0 and 100%, both measurements will be used.

Swithc between two thermostat band (two references)

It is a good idea to use this function for refrigeration appliances containing impulse purchases where the products are often exchanged. Via a switch function it is possible to change between two thermostat settings depending on the products contained in the appliance. The change-over between two thermostat bands is activated via a contact or via a pulse signal of at least three seconds’ duration – as a rule via a key switch placed on the appliance. When the switch is activated the thermostat settings as well as the limits for the alarm thermostat and the product sensor will change. The changeover between the two thermostat bands can also be seen on the display, but only if the shift is set to take place with a pulse signal. When a change-over is activated the display will show to which thermostat band the change goes.

Displacement of reference for thermostat

The signal may be a 0-5V, 0-10V, 1-5V or 2-10V voltage signal. Two oﬀset values must be set, one indicating the displacement at minimum signal and another indicating the displacement at maximum signal. The displacement will apply to all sections. The displacement will not aﬀect the alarm limits.

Melting function

This function will stop the air ﬂow in the evaporator from being reduced by frost created by uninterrupted operation for a long time. The function is activated if the thermostat temperature has remained in the range between -5°C and +10°C for a longer period than the set melting interval. The refrigeration will then be stopped during the set melting period. The frost will be melted so that the air ﬂow and hence the evaporator’s capacity will be greatly improved. The settings for melting interval and melting period are common to all sections, but the controller will displace the melting time for the diﬀerent sections so that no synchronisation will take place. If there are several controllers in the same defrost group the time between the two meltings should be set diﬀerently in the individual controllers. In this way a synchronisation of the thermostats’ cutin times will be avoided.

Timer for compressor relay

If a compressor relay has been selected, the relay’s timer function will have higher priority than the thermostat function.

In refrigeration appliances there may be big load diﬀerences between the shop’s opening and closing hours, especially if Night blinds/curtains are used. The thermostat reference may be raised here without it having any eﬀect on the product temperature. Change-over between day and night operation can take place, as follows:

• via the built-in weekly schedule

• via an external switch signal

• via a signal from the data communication

When night operation starts the thermostat reference will be displaced with an oﬀset value that normally will be positive. It must however be negative if cold accumulation is to take place. When a Night blind is used the distribution of air in the appliance will change radically. A change of the thermostat’s weighted S3/ S4 ratio will therefore be required. As a rule the S4 share is set at a lower value during the night than during the day.

The thermostat reference can be displaced via an external voltage signal which is particularly useful for process cooling.

Temperature alarms

Alarm thermostat

The function is used for sounding the alarm before the product temperature at the refrigeration site becomes critical. You can set alarm limits and time delays for high and low temperatures. Alarm will be given if the set limit is exceeded, but not until the time delay has expired. There will be no alarms when refrigeration has been stopped due to cleaning of the appliance or if the main switch is set in pos. OFF. The alarm sensor may be chosen independently of the sensor used for the thermostat function.

Alarm sensor

The alarm sensor may be selected as either S3 or S4, or a weighted value of both of them. The setting is performed as a percentage value of S4. The weighting need not be the same as for the thermostat function. In other words, the thermostat may regulate according to S4 and the alarm thermostat may give alarm according to S3.

Alarm limits

Diﬀerent alarm limits can be set for the individual sections. The alarm limits are set as absolute values in °C. If thermostat bands are used, separate limits can be set for each thermostat band. The alarm limits are not aﬀected if there is an external reference displacement via a voltage signal. During night operation the value for upper limit will raise with the same value as night operation is raised with (a negative night setback will not change the limit value).

Curve 1: Cooling stage (1): Time delay has been exceeded. . Alarm be comes active. Curve 2: Normal regulation where the temperature becomes too high (2): Time delay has been exceeded. . Alarm be comes active. Curve 3: Temperature becomes too low (3): Time delay has been exceeded. . Alarm be comes active.

If regulation is carried out with two thermostat bands there will be a set of alarm limits for each band. Time delays will be common to the two bands.

Product sensor with alarm function

An extra temperature sensor may be connected to each section. The sensor will function independently of the other functions.

Alarm limits and time delays can be set, as for the alarm thermostat.

Time delay

Three time delays are set for alarms:

- For too low temperature

- For too high temperature during normal regulation

- For too high temperature during cooling down

• after activation of internal or external start/stop

• during a defrost

• after a power failure

• after appliance cleaning. The time delay will apply until the actual air temperature has dropped below the “upper alarm limit”..

Example

Frost alarm

If the thermostat is controlled according to the S3 temperature or a weighting of S3/S4, there could be a risk (on the refrigeration shelves) that the evaporator’s S4 discharge temperature may become so cold that the products at the back of the shelves become exposed to unintended frost temperatures. To prevent this, the controller has a built-in frost alarm. If the S4 temperature falls below a set frost limit an alarm will be given so that the cause of the cold outlet temperature can be found and corrected.

N: Thermostat cut-in value OUT: Thermostat cut-out value Lim: Alarm limit for high temperature and low temperature S: Alarm ceases

Common functions

Fan control

To obtain energy savings it is possible to reduce the power supply to the fans at the evaporators. The reduction can be done:

- during the thermostat’s cutout period (cold room)

- during night operation and during the thermostat’s cutout period (appliance with Night blind)

It can be controlled by one of the following 4 fan types:

Single speed fan

One relay is used here to control the fans. This relay can be pulse controlled, but only when all sections/evaporators are cut out

A period of time is set as well as the percentage of this period of time where the fans have to be operating.

2-speed fans

Two relays are used here to control the fans. One relay will provide full speed for the fans, and when the second relay triggers, the speed of the fan motors is reduced. The relay for reduced speed will be referred to as 'eco' in the setup of outputs.

Fan with EC motor

Here the controller must use an analogue output module that can deliver the desired voltage to the EC motor. 0 - 10 V, 2 - 10 V, 0 - 5 V or 1 - 5 V. The desired fan speed is given as a percentage of the output signal i.e. 0 - 100 %. For example, 90 % during normal daytime operation and 70 % during eco operation. Diﬀerent values can be set for the four operating modes: Normal day, Normal night, Day with thermostat disconnected, Night with disconnected thermostat. A minimum start speed can be set. This setting will only apply for 10 seconds after the start.

Fans that are controlled by a frequency converter (VSD)

The controller must use an analog output module for these with a starting relay for on/oﬀ control of the converter. The settings are the same as for EC motors

Rail heat control

It is possible to pulse-control the power to the rail heat in order to save energy. Pulse control can either be controlled according to day/night load or dew point.

Pulse control according to day and night

Various ON periods can be set for day and night operation.

A period time is set as well as the percentage part of the period in which the rail heat is ON.

Pulse control according to dew point

In order to use this function a system manager of the type AK-SM 720, 850, AK-SC 255 or 355 is required which can measure dew point and distribute the current dew point to the appliance controllers. For this the rail heat’s ON period is controlled from the current dew point.

Eﬀect

Railheat. Min. ON%

Dew point

Two dew point values are set in the appliance control:

• One where the eﬀect must be max. i.e.100%.

• One where the eﬀect must be min. At a dew point which is equal to or lower than the value, the eﬀect will be the value indicated in "Rail heat min ON%". In the area between the two dew point values the controller will manage the power to be supplied to the rail heat.

The current dew point and duty cycle for rail heat can be read oﬀ Stop of fans if cooling is missing If the refrigeration in a breakdown situation stops, the temperature in the cold room may rise quickly as a result of the power supply from large fans. In order to prevent this situation the controller can stop the fans if the temperature at S5 exceeds a set limit value. The function can also be used as a sort of MOP function during start-up with a hot evaporator. The fans will not start until the S5 temperature has been reached below the set limit value. In other words, the evaporator and hence the compressor wll not be so heavily loaded during the startup phase. The function uses the S5 sensor from section A. The function is not active when refrigeration has stopped.

as status values.

If the dew point signal cannot be distributed to a controller, the

rail heat will revert to day/night control.

During defrost the rail heat will always be 100% ON.

If rail heat ON is selected, it will run at 100% during defrost + the

time after defrost if the thermostat temperature is above the cut-

in limit (but max. 15 minutes).

Compressor control

The controller has a function that can be used for compressor control. When the function is selected ON a relay will automatically follow the status of the thermostat functions. The relay is ON when the thermostat demands refrigeration. If the thermostat function is selected OFF the compressor output will constantly be ON. A minimum ON time and a minimum restart time for the relay belong to the function. The relay will be OFF during defrost. There is display of:

- operating hours during the past 24 hours

- total number of operating hours

- number of couplings during the past 24 hours

- total number of couplings

Appliance cleaning

This function makes it easy for the shop’s staﬀ to carry out a cleaning of the appliance according to a standard procedure.

Function

Appliance cleaning is activated via a pulse signal of minimum three seconds’ duration – as a rule via a key switch placed on the appliance. It can however also be activated via data communication. Appliance cleaning is carried out via three phases: 1 - at the ﬁrst activation the refrigeration is stopped, but the fans

keep on operating in order to defrost the evaporators. ”Fan” is shown on the display.

2 - at the second activation the fans are also stopped and the

appliance can now be cleaned. ”OFF” is shown on the display.

3 - At the third activation refrigeration is recommenced. The

display will show the actual appliance temperature.

To carry out cleaning of a frost appliance as quickly as possible cleaning can be started with a defrost sequence.

When appliance cleaning is activated a cleaning alarm is transmitted to the normal alarm recipient. A later processing of these alarms will document that the appliance has been cleaned as often as planned. The function saves information on when the last appliance cleaning was carried out and how long it lasted.

Appliance shutdown

This function makes it possible to shut down a refrigeration appliance using data communication or a switch signal. When the signal is received, refrigeration and alarm monitoring stops. Fans and lights will do the following depending on the setup:

• Fans continue. The light will follow the standard setup.

• Fans stop immediately. The light immediately switches oﬀ.

• Fans stop when the delay time expires. The light will follow the standard light control.

• Fans stop when the delay time expires. The light switches oﬀ when the delay time expires.

The shutdown delay time is adjustable and applies to both fans and lights. Any night curtain output will follow the light function.

Door contact

The door contact function can be deﬁned for two diﬀerent applications:

- Door alarm

The controller monitors the door contact and delivers an alarm message if the door has been opened for a longer period than the set alarm delay.

- Stop of refrigeration + door alarm

When the door is opened the refrigeration is stopped, i.e. the injection and the fan are stopped. If the door remains open for a longer time than the set restart time, refrigeration will be resumed. This will ensure that refrigeration is maintained even if the door is left open or the door contact should be defective. If the door remains open for a longer period than the set alarm delay an alarm will also be sounded.

In both applications the alarm function will also contain a local reminder which is activated when 75% of the set time has been passed. This reminder only appears on the connected display and the intention of it is that the door must be closed before the alarm for open door is released.

From the controller the following can be read:

- the duration of the last open period

- the total open period during the past 24 hour

- number of openings during the past 24 hours

Defrost has higher priority than the door function. That is to say, refrigeration and fans will not be started until defrost is complete.

The door contact function can also activate the light function so that the light is turned on and kept on for a period of time after the door has again been closed. Cf. the section on light function.

Light function

The function can be used for controlling the light in a refrigeration appliance or in a cold room. It can also be used for controlling a motorised night curtain.

The light function can be deﬁned in three ways:

- the light is controlled via a signal from a door contact. Together with this function a time delay can be set so that the light is kept burning for a period of time after the door has been closed.

- the light is controlled via the day/night function

- the light is controlled via the data communication from a system unit.

It is possible to set whether the light is to be switched on or oﬀ when the main controller switch is activated. This is set in the function "Light at main switch=oﬀ". If "Light at main switch=oﬀ" is set to ON, the normal light function will be maintained when the main switch is switched oﬀ. If OFF is selected for this setting, the light will stay oﬀ when the main switch is switched oﬀ.

Night blind

Motorised night blind can be controlled automatically from the controller. The night blinds will follow the status of the light function. When the light is switched on, the night blinds opens and when the light is switched oﬀ, the night blinds close again. When the night blinds are closed, it is possible to open them using a switch signal on the digital input. If this input is activated, the night blinds will open and the refrigeration appliance can be ﬁlled with new products. If the input is activated again, the blinds close again. When the night blind function is used, the thermostat function can control with diﬀerent weighting between the S3 and S4 sensors. A weighting during day operation and another when the blind is closed.

A night blind is open when the appliance cleaning function is activated. To ensure the correct position of the night blind the fans can be switched oﬀ in the period during which the night blinds roll down.

Forced closing

The AKV (stepper) valves can be closed with an external signal (the “Inject ON signal”). The function must be used in connection with the compressor’s safety circuit, so that there will be no injection of liquid into the evaporator when the compressor is stopped by the safety controls. (However not at low pressure – LP).

The signal can also be received from the DI-input or be received via the data communication.

During a forced closing the fans can be deﬁned to be stopped or in operation. Defrosting can also be permitted or omitted during this period. If defrosting has been requested within 10 minutes of the end of forced closing, defrosting will restart the moment forced closing ends.

Alarm relay

If the controller is to give alarm at a relay output, the relay must be deﬁned. A setting determines when the relay is activated:

- Only for alarms with “high” priority

- For alarms with “low” and “medium” priority

- For alarms with “low”, “medium” and “high” priority.

The controller can receive a signal from a leak detector. This signal will not activate the alarm relay; but the alarm will be shown on any displays that are connected.

Start/stop of regulation (main switch)

A software setting is used for starting and stopping the regulating function. ON = normal regulating function OFF = Regulation stopped. All outputs will be set in standby mode. All alarms are stopped. An alarm can however be transmitted to the eﬀect that regulation has stopped. The function applies to all sections.

You can also deﬁne an external switch for start/stop of the regulation. If an external switch is deﬁned regulation will only be carried out when both switches are in position ”ON”.

General monitoring functions

General alarm inputs (10 units) An input can be used for monitoring an external signal.

The individual signal can be adapted to the relevant use as it is possible to give the alarm function a name and to indicate your own alarm text. A time delay can be set for the alarm.

General thermostat functions (5 units) The function may freely be used for alarm monitoring of the plant temperatures or for ON/OFF thermostat control. An example could be thermostat control of the fan in the compressor compartment.

The thermostat can either use one of the sensors used by the regulation (Ss, Sd, Sc3) or an independent sensor (Saux1, Saux2, Saux3, Saux4). Cutin and cutout limits are set for the thermostat. Coupling of the thermostat’s output will be based on the actual sensor temperature. Alarm limits can be set for low and high temperature, respectively, including separate alarm delays. The individual thermostat function can be adapted to the relevant application as it is possible to give the thermostat a name and to indicate alarm texts.

General pressure control functions (5 units) The function may freely be used for alarm monitoring of plant pressure or for ON/OFF pressure control regulation.

General voltage input with ancillary relay (5 units) 5 general voltage inputs are accessible for monitoring of various voltage measurements of the installation. Examples are monitoring of a leak detector, moisture measurement and level signal - all with ancillary alarm functions. The voltage inputs can be used to monitor standard voltage signals (0-5V, 1-5V, 2-10V or 0-10V). If required, one can also use 0-20mA or 4-20mA if external resistance is placed at the inlet to adjust the signal to the voltage. A relay outlet can be attached to the monitoring so that one can control external units.

For each inlet, the following can be set/read out:

- Freely deﬁnable name

- Selection of signal type (0-5V, 1-5V, 2-10V, or 0-10V)

- Scaling of read-out so it corresponds to measuring unit

- High and low alarm limit including delay times

- Freely deﬁnable alarm text

- Attach a relay output with cut in and cut-out limits including delay times

The pressure control can either use one of the sensors used by the control function (Po, Pc) or an independent sensor (Paux1, Paux2, Paux3). Cutin and cutout limits are set for the pressure control. Coupling of the pressure control’s output will be based on the actual pressure. Alarm limits can be set for low and high pressure, respectively, including separate alarm delays. The individual pressure control function can be adapted to the relevant application as it is possible to give the pressure control a name and indicate alarm texts.

Liquid injection

Principle

Up to four valves can be connected. One for each solid state output. Control can be carried out with electrically operated expansion valves type AKV, ETS or CCMT. Or injection can take place with thermostatic expansion valves (TEV) where the temperature will then be regulated with solenoid valves type EVR or similar. If both a stepper valve and a solenoid valve are installed in the liquid line, any liquid trapped between the two valves will be returned if the valve is a Danfoss EVR.

Functions:

• Disconnected. Liquid ﬂow is not permitted

• Liquid ﬂow is permitted. Stopped by a common DI signal

• Liquid ﬂow is permitted. Stopped by a signal from the system device. The signal is common to all sections. When regulating with a ﬂooded evaporator, three separate superheat settings are used.

It is the installer’s responsibility to ensure that signal loss to the controller will not result in liquid throughput to the compressor. Danfoss accepts no responsibility for damage resulting from inadequate installation.

Scaling factor for the valve

The valve’s staging area can be limited when a step valve is chosen or it can be guided using an analogue output signal. The setting applies to all sections.

Pressure transmitter signal

One pressure transmitter can supply signals to several controllers if they regulate refrigeration points on the same suction line. But if a valve is mounted in an evaporator’s suction line, say, a KVP / KVQ or PM, the pressure transmitter must be placed before the valve. The signal can now only be used by the relevant controller.

Refrigerant

Adaptive superheat with AKV (stepper) valve

The evaporating temperature is measured with pressure transmitter P and the superheat with the pressure transmitter and the S2 sensor.

SH closed

The function contains an adaptive algorithm that independ-

Before regulation can be commenced, the refrigerant must be deﬁned. You can directly select one of the current refrigerants:

1 R12

2 R22 14 R32 26 R600 38 R1234ze 3 R134a 15 R227 27 R600a 39 R1234yf 4 R502 16 R401A 28 R744 40 R448A 5 R717 17 R507 29 R1270 41 R449A 6 R13 18 R402A 30 R417A 42 R452A 7 R13b1 19 R404A 31 R422A 8 R23 20 R407C 32 R413A 9 R500 21 R407A 33 R422D 10 R503 22 R407B 34 R427A 11 R114 23 R410A 35 R438A

12 R142b 24 R170 36 R513A

13 User deﬁned

25 R290 37 R407F

ently adjusts the valve’s opening degree, so that the evaporator constantly delivers optimum refrigeration at lowest possible superheat. The superheat reference will be limited by the settings for min. and max. superheat.

If the superheat is very low, the valve may be closed very quickly using the "SH closed" setting.

If a new refrigerant is demanded which is not as yet contained on the list you may select ”User-deﬁned” which is subsequently set with data for the refrigerant in question. The values can be ordered from Danfoss.

Warning: Incorrect selection of refrigerant can cause damage to the compressor.

When the superheat has dropped to 1 K over the "SH closed" limit, this function will reduce the degree of opening of the valve so that the valve will with certainty remain closed if the superheat fall to the "SH closed" value. To ensure that the close function does not generate the general superheat regulation, the "SH closed" setting must be at least 1K lower than "SH min".

MOP control

(MOP = Max. Operating Pressure) The MOP function limits the valve’s degree of opening as long as the evaporating temperature measured by S1 is higher than the set MOP temperature. The function can only be active when the

Flooded evaporator

This function allows liquid ﬂow in the evaporator, but only when a signal is received. If the signal disappears, then the regulation switches over to “adaptive superheat”.

AKV injection valve function is ON.

Start/stop of injection

The injection can be stopped separately for each evaporator section.

Defrost

There is a common defrost start for all evaporator sections. Defrost stop can be common or individual when based on temperature. Refrigeration will not be re-started until defrost has been accomplished in all sections.

Fan control during defrost Choose whether the fans should be running or stopped during the defrost sequence.

Coordinated defrost If there are several controllers that are to perform defrost at the same time they can be grouped from the system unit. The system unit will start the defrosts, and when the defrost of the individual controllers is later ﬁnished they will go into ”stand-by” position until all the defrosts have been terminated. Refrigeration is then resumed.

Drip tray heating element

It is possible to control a heating element in the drip tray for hot gas defrost. When defrost is commenced, the heating element is activated. The heating element remains activated until a set time after defrost has ended by time or temperature.

Defrost type

Hot gas defrost

During hot gas defrost, the controller regulates valves in the liquid line, hot gas valves, a suction line valve and a drain valve. A time delay can be set which defers opening of the hot gas valve.

Defrost start

Defrost can be started in several ways. Once started it will continue until a ”defrost stop” signal is received.

- Manual defrost Manual defrost can be enabled via a setting in the controller or via the bottom button on the display. After activation the setting moves back to position OFF when the defrost has been completed.

Electric defrost

When there is electric defrost, the individual sections’ heating elements are controlled separately.

Natural defrost

Defrost is accomplished here by the fans circulating air through the evaporator.

Warm brine defrost

Warm brine defrost can be used on indirect refrigeration systems with solenoid valves. During warm brine defrost, the solenoid valve is kept open during defrost so that the warm brine can run through the "evaporator".

- External signal on input Defrost start is done with a signal on a DI input. The signal must be an impulse signal of at least three seconds’ duration. Defrost starts when the signal moves from OFF to ON.

- Schedule – weekly programme

Defrost can be started via an internal schedule or via an external schedule placed in the network's system unit.

• Internal schedule Defrost is started by means of a weekly programme that is set in the controller. The times have relation to the controller’s clock function. Up to eight defrosts per 24 hours can be set. The schedule can be found via the ”Overview display” / ”Defrost” / ”Schedule”.

• External schedule

Defrost is started via a signal from the network's system unit

- Interval Defrost starts with set intervals, e.g. every eight hours. An interval must ALWAYS be set to a "higher" value than the period set between two defrosts when a schedule or network signal is used. Defrost according to intervals ensures that defrost always takes place, even if no signal is received from the network's system unit.

- Adaptive defrost This function can cancel planned defrosts which are not necessary, and on its own initiative it can start a defrost if the evaporator is about to be blocked by rime and ice. (The "Adaptive defrost" function is described at the end of the section.)

Defrost sequence

Every defrost runs through the following sequence:

- emptying of evaporator (pump down) (state 1)

- defrost is initiated (state 3)

- waiting position (used for coordinated defrost) (state 4)

- drip-oﬀ (injection delay) (state 5)

- Pressure equalisation where the drain valve opens (hot gas defrost only) (state 6)

- fan delay (state 7)

Emptying of evaporator (state 1) Before the defrost heating elements are started it is possible to carry out emptying of the evaporator. During a set time delay (hot gas delay), the valve in the liquid line remains closed, the fans run and the evaporator is drained of refrigerant. When the delay time has expired it will continue to state 3.

For large evaporators there should be two S5 sensors – S5-1 and S5-2. The defrost is stopped when both temperatures have attained the set value.

If the defrost time exceeds the set max. defrost time, the defrost stops. This will happen even if the defrost stop temperature has not been reached (max. defrost time will function as safeguard). When the defrost is stopped on time, the alarm message “Max. def. period exceeded” will appear for the section in question. If the alarm is not acknowledged within ﬁve minutes, it will automatically be cancelled.

When there is an error in a defrost sensor, an alarm appears and the defrost stop will then be based on time in the relevant section. Defrost stop for the remaining sections will still be based on

temperature.

Defrost (state 3)

• Electric defrost The electric heating elements are activated here.

• Natural defrost Here, the fans run in order to defrost the evaporator using air circulation alone.

• Hot gas defrost Here, the drain valve and suction line valve are closed. The hot gas valve opens in order to feed hot gas through the evaporator.

• Warm brine defrost Here, the solenoid valve is held open so that warm brine can be fed through the evaporator.

Defrost stop There are four kinds of defrost stop to choose from.

• Individual stop using temperature and with time as security In the case of electric and hot gas defrost, one output per evaporator is used here, i.e. an individual heating element / hot gas valve per evaporator.

• Common stop using temperature and with time as security In the case of electric and hot gas defrost, only one output is used for all evaporators, i.e. one output for heating element / common hot gas valve.

Example of hot gas usage with common hot gas valve for all evaporators

The temperatures of each evaporator are measured using a sensor. Once all the evaporator temperatures are equal to or greater than the set temperature for defrost stop, defrosting is stopped in all sections and the defrost sequence continues.

The selection of defrost stop sensor as well as the "safeguard" stop on time if stop temperature can not reached is exactly as described for individual stop.

• Stop based on time A ﬁxed defrost time is set here. When this time has elapsed, the defrost will be stopped and cooling will be resumed. (When stop on time the controllers does not check whether one or more of the evaporators still require defrost.

Example of hot gas usage with individual stop per evaporator

The temperatures of each evaporator are measured using a sensor. When this temperature is then equal to or greater than the set temperature for defrost stop, defrost stops in the section in question. The defrost sequence continues only when all sections have completed defrost. When there is electric defrost, S5 is normally selected as defrost sensor, but S3, S4 or S2 may also be selected (S3 is an air sensor placed in the evaporator inlet, and S4 is an air sensor placed in the evaporator outlet).

• Minimum defrost time A time can be set which must pass before defrosting can be concluded. This time setting has higher priority than Max. defrost time.

• Manual stop Defrost in progress can be stopped manually by enabling the "Stop defrosting" function."

If a signal on forced closing during a defrost is received, the selected setting determines whether defrosting is to be stopped.

Coordinated defrost (state 4) Via a system unit it is possible to perform a group defrost with other appliance controllers. The system unit will in that case start a defrost with a start signal via the data communication. When the ﬁrst section of a controller has ﬁnished defrost, the controller starts the “Max. hold time” function and when all sections have ﬁnished defrost, this is recorded by the system unit. The controller will then move into waiting position until it receives a signal to restart refrigeration. This happens when all controllers in the group have concluded their defrosts. If this message has not been received within the “Max. holding time” time, the controller will resume refrigeration under all circumstances.

Drip-oﬀ delay (state 5) A time delay can be put in so that any drops of water may drip oﬀ the evaporator before refrigeration is resumed. In this way it is ensured that the evaporator as far as possible is free from water when refrigeration is restarted.

Drain delay / pressure equalisation during hot gas defrost (state 6) When the drip delay is completed, it is possible to add a drain delay in which the smaller drain valve opens up to the suction line so that pressure equalisation takes place. Once the drain delay has expired, the main valve in the suction line opens and cooling is resumed.

Example Below is an example of a defrost sequence using hot gas defrost.

The following are used in the example:

- Hot gas defrost with common hot gas valves

- Defrost using the evaporators is stopped individually using the S5 temperature

- The fans are stopped during defrost

The defrost sequence will be as follows:

Delayed fan start (state 7) Regardless of whether the fans are running or have stopped during the defrost sequence, the fans can be stopped during this delay. Drops of water left on an evaporator after defrost should be bound to the evaporator (primarily used in freezing rooms). After defrost, the liquid injection is started, the evaporator is cooled down, but the fans will be started a little later. During this period the controllers operate the expansion valve by force, but they constantly monitor the superheat. The temperature at which the fans are to be started is set (measured always with the S5 sensors). The max. permissible time delay in minutes is set. The time delay for fan start will not commence until the time delay for liquid injection, if applicable, has run out. Only when all the S5 sensors register a lower temperature than the set will the fans be started. If all S5 sensors do not register a lower temperature than the set by the delay time has elapsed, the fans will start. At the same time alarm is given that Maximum delay time for fan is exceeded for the section in question. If the alarm is not acknowledged within ﬁve minutes, it will automatically be cancelled. If some of the S5 sensors are defective, the signal from sensors that remain intact will be used.

• Pump down (state 1) The AKV (ETS) valve closes, the heating element in the drip tray is activated and the fans run.

• Time delay before the next phase (hot gas time delay, state 2)•

Defrost (state 3)

The fans stop, the main valve and the drain valve in the suction line are closed and the hot gas valve opens. Defrost is terminated when the S5 sensor has reached its stop temperature.

• Hold (state 4) If coordinated defrost is being used, the controller will wait for a release signal from the network's system unit before continuing with the sequence. Alternatively, the hold stops once the maximum hold time has expired.

• Drip delay (state 5) Cooling is delayed so that any drops of water can run oﬀ the evaporator.

• Drain delay / pressure equalisation (state 6) The drain valve opens so that pressure equalisation takes place in the evaporator.

• Fan delay (state 7) The main valve in the suction line opens and liquid injection is resumed. The fans are delayed so that the remaining drops of water are bound to the evaporator. The fans start when the required fan start temperature has been reached on the S5 sensor,

or when the set delay time has expired.

• Drip tray heating element The drip tray heating element is switched oﬀ when the set delay time has expired. This delay time is applicable from the end of defrost (state 3).

Adaptive defrost

This function can cancel planned defrosts which are not necessary, and on its own initiative it can start a defrost if the evaporator is about to be blocked by rime and ice. This function is based on a registration of the air ﬂow through the evaporator. By using the AKV (stepper) valve as mass ﬂowmeter for the refrigerant ﬂow it is possible to compare the energy admission on the refrigerant side with the energy emission on the air side. Via this comparison the air ﬂow through the evaporator can be determined and hence also the amount of ice/frost build-up on the evaporator surface.

Automatic adaptation to the evaporator When adaptive defrost is activated it will carry out an automatic tuning in order to adapt itself to the relevant evaporator. The ﬁrst tuning takes place after the ﬁrst defrost so that tuning can be carried out on an evaporator without ice/rime formation. New tuning subsequently takes place after each defrost (but not at night with night blinds). In a few cases it may happen that the function is not correctly adapted to the relevant evaporator. This is usually because the automatic adjustment has been made under abnormal operating conditions at start-up/on testing the system. This will result in the function reporting an error state. If this happens, a manual reset of the function should take place while brieﬂy setting the function switch to "OFF".

Status display For each evaporator it is possible to display the current operating status for adaptive defrost: 0: OFF Function not activated 1: Error Reset to be carried out 2: Tuning Function carries out automatic tuning 3: OK - no ice build-up 4: Slight ice build-up 5: Medium ice build-up 6: Heavy ice build-up

Restrictions and sensor signals:

The following connections/signals must be used:

- Expansion valve type AKV/ETS/CCMT

- Temperature signal from both S3 and S4 It is essential that the S3 and S4 sensors are located in the air ﬂows of the evaporator inlet and evaporator outlet. The sensors must be mounted in such a way that the eﬀects of external heat sources, such as fan motors, are minimised as far as possible.

- Pressure signal from condensation pressure Pc The Pc signal can be received from a pressure transmitter which is connected to the controller, or it may be received via data communications from the system unit. (Several controllers may share the same Pc signal.) If the controller does not receive a Pc signal, it will use a constant value for the condensation pressure.

- Adaptive defrosting cannot be used if one of the following refrigerants are used for regulation: R23, R513B, R13B1 or userdeﬁned.

schedule in the system unit. Other defrost start signals will always result in defrost. This function will only cancel defrost if all evaporator sections so permit.

Function selection This function can be set to operate in one of the following ways:

0. OFF: The function is stopped. Any alarms are removed and the function is reset.

1. Monitoring only:: The function is used exclusively to monitor the formation of ice on the evaporator – the function will not cancel planned defrosts. If the function detects severe ice/rime formation on an evaporator, an alarm "Appliance A – air ﬂow reduced" is transmitted. The alarm is removed at the start of the next defrost.

2. Skipping of defrosts by day (appliances with night blinds) This setting is used if function is only to cancel unnecessary defrosts by day, and if night blind is used for the appliance. This function undertakes new tuning only when defrost takes place during day operation. The controller MUST be set to night state when night time cover is set for the appliance – this may take place via a schedule in the controller or alternatively via a signal from the system unit. This is because there is a risk of the function detecting the formation of rime/ice on the evaporator when night blind is set for the appliance. (A greater reduction in air ﬂow may occur as a consequence of a small distance between night blinds and products. It is important for night time cover to be removed from the appliance when the controller switches to day operation. If not, there is a risk of incorrect tuning, and hence missing data for cancelling defrosts. Correct tuning will take place only after the next defrost.

3. Skip defrost day and night (refrigeration rooms and appliances without night blind) This setting is used if the function is to cancel defrosts for rooms and appliances without night blind. New tuning of the function takes place after each defrost.

4. Full adaptive defrost This setting is used if the function is to start defrosts on its own initiative. The setting can ideally be used in refrigeration/ frost rooms where the time of defrost is not as important. In refrigeration/frost rooms, this setting can ensure major savings as defrosts take place only when necessary. Scheduled defrosts will always be carried out. That is to say, a basic schedule can be input and the adaptive function will then start extra defrosts itself where necessary..

Minimum time between defrosts

It is possible to enter a minimum time between defrosts. In this way it can be avoided that planned defrosts according to the weekly schedule be carried out immediately after the termination of a adaptive defrost. The time span is from the termination of a adaptive defrost and until a planned defrost is again allowed.

This function can only cancel planned defrosts which start from a defrost schedule – either an internal schedule or an external

Documentation on saving It is possible to read the number of planned defrosts and the number of cancelled defrosts.

Alarms

• Appliance not defrosted If this function detects ice formation shortly after defrost, the "Appliance not defrosted" alarm is generated. This error may be due to the evaporator not being defrosted correctly as a consequence of faults in heating elements or fans. After this alarm, the function will not cancel defrosts. This alarm is removed at the start of the next defrost, at which point cancellation of defrosts will be permitted again.

• Air ﬂow reduced If this function detects severe ice formation on the evaporator, the alarm "Appliance X – air ﬂow reduced" is transmitted. This error will typically be due to severe ice formation on the evaporator, but it may also be due to reduced air ﬂow as a consequence of severe over stacking of goods or dropout of fans. After this alarm, the function will not cancel defrosts. This alarm is removed at the start of the next defrost, at which point cancellation of defrosts will be permitted again.

• Sensor error The controller cannot carry out a tuning calculation for use in the adaptive defrosting. After this alarm, the function will not cancel defrosts. This alarm is removed at the start of the next defrost, at which point cancellation of defrosts will be permitted again.

• Flash gas alarm This function will monitor whether there is any ﬂash gas at the expansion valve. If ﬂash gas is detected over a fairly long period, the alarm "Appliance X – Flash gas alarm" is triggered. This alarm is removed when ﬂash gas disappears or at the start of the next defrost.

• Valve The function is suitable for application of a valve from Danfoss. Valves from other manufacturers is not recommended.

Miscellaneous

Alarm priorities

The diﬀerent alarms that can be generated by the controller can be given a priority. “priority” will activate the alarm relay if it has been so deﬁned. The alarms are entered in the alarm log and also transmitted to the data communication if connected. The “Log only” priority will as mentioned only be entered in the alarm log.

Setting Log Selection Alarm relay Grid

Non High

High X X X X 1

Medium X X X X 2

Low X X X X 3

Log Only X

Disabled

Low - Mid-

dle

Low -

High

Sensor correction

The input signal from all connected sensors can be corrected. A correction will only be necessary if the sensor cable is long and has a small cross-sectional area. All displays and functions will reﬂect the corrected value.

Clock function

The controller contains a clock function, that can be used together with schedules for defrost and day/night operation. In the event of a power failure, the time setting will be remembered for at least 12 hours If the controller is linked up to a System Manager via the data communication, the System Manager will reset the clock.

Signals via data communication

The controller contains a number of functions that can be activated/overridden by the network’s system unit:

work

AKM dest.

Forced refrigeration

The controller will undertake refrigeration when this signal is received. Refrigeration will continue until the signal is removed. The function will ignore the thermostat function, but forced cooling will be stopped if there is a low temperature alarm. (If a setting means that forced cooling and defrosting are required at the same time, defrosting will have the higher priority.)

Display signal

The air temperatures measured at the evaporator can be read from a display. This display must be of display type EKA 163B or EKA 164B. The display is normally mounted on the appliance so that the customer can see the air temperature. Up to four displays per controller can be ﬁtted. Connection is eﬀected by means of wires with plug connectors. The display can be placed on an appliance front, for example. When a display with operating buttons is selected, the unit can be operated with ease by means of a menu system as well as displaying temperatures and operating situations.

Display signal

Temperature display can be selected for a product sensor, or alternatively a weighted condition between air sensors S3 and S4. Setting is expressed as a percentage of the S4 signal. The display is independent of the thermostat function. An Oﬀset can be set for the display. Values are displayed by means of three digits, and one setting allows you to decide whether the temperature is to be displayed in °C or °F.

Night operation

The day/night operation of the individual controllers can be controlled from a central weekly schedule in the system unit.

LEDs on the front

The LEDs will come on when the associated relay is activated: 2nd LED = refrigeration 3rd LED = defrost

Interruption of injection

The system unit can ensure that all appliance and room controllers force-close their valves if all compressors in the belonging central plant stop due to operation breakdowns and are prevented from starting again.

4th LED = ventilator operational The LEDs will ﬂash when an alarm has been triggered. In this situation, you can call up the error code on the display by brieﬂy pressing the top button. At the same time, any alarm relays will be deactivated.

Light control

In appliance controllers the light can be controlled via a central weekly schedule in the system unit.

The buttons

When you want to change a setting, the top and bottom buttons will give a higher or a lower value depending on which button

Coordinated defrost

Several appliance controllers can be grouped in the system unit so that they will start a defrost at the same time and subsequently start up after defrost at the same time.

you press. Before you can change the value, you must access the menu. This is done by holding down the top button for a couple of seconds; this takes you into the list of parameter codes. Find the parameter code you want to change, then press the centre button to display the parameter value. When you have changed this

Adaptive defrosting

value, save the new value by pressing the centre button again

By using the "Adaptive Defrosting" function the controller must receive a condensing pressure signal Pc. This signal must be received from the System Manager.

Examples:

Setting a menu

1. Press the top button to display a parameter

Optimization of suction pressure

The appliance/room controllers can supply the necessary information to the system unit so that it can optimise the suction pressure

2. Press the top or bottom button and ﬁnd the parameter you want to set

3. Press the centre button to display the value

based on the appliance with the heaviest load.

4. Press the top or bottom button and set the new value

5. Press the centre button again to save the value.

Read the temperature at the defrost sensor)

• Brieﬂy press the bottom button

Manual start or stop of defrost

• Press the bottom button for 4 seconds.

Read codes

Normally the selected temperature signal can be read from the display, but under certain conditions the display may show other codes in order to notify the user of various operating states.

Function Display read

Main switch When the "main switch" is set to OFF, the display will

Defrost During defrost, the display will read "-d-".

Case cleaning

PAS Requirement for access code. If operation of the display

Alarm The three LED's will ﬂash if an alarm is triggered. The

CO2 FLASHING. There is a signal from a refrigerant leak

- - - When three dashes appear, the valid temperature read-

th1/th2 When the thermostat bank is changed by pressing a

AL 1 Alarm from section A. 2=B. etc.

- - 1

- - 2

read "OFF"

The display will switch to normal temperature display when the thermostat temperature is in place, but not until after the delay period “Max. Disp. -d- delay”.

When appliance cleaning is activated, the display will read "Fan" to indicate that the fans are running in order to defrost the evaporator. When the second stage of appliance cleaning is activated, the display reads "OFF" in order to indicate that the appliance can now be cleaned as all outputs are in standby position.

is to be protected by an access code, both the deﬁnition and the access code must be set in the controllers' authorisation menu for the local display (LOCD).

alarm code can be viewed by pressing the top button.

sensor

ing is faulty (sensor switched oﬀ or short-circuited), or else the display has been deactivated.

button, the display will display for 10 seconds which thermostat band is active.

Initiation, Display is connected to output A Output B. etc.

Get oﬀ to a good start when use of display

The following procedure will start regulation as quickly as possible:

1. Open parameter r12 and stop regulation (in a new appliance not set previously, r12 will already be set to 0, which means regulation stopped)

2. Open parameter o93 and set the conﬁguration lock to a value of 0 (=OFF)

3. Open parameter 062 = Select a predeﬁned use on the basis of the electrical connections which appear at the end of the manual. After conﬁguration of this function, the controller will shut down and restart.

4. Once the controller has restarted, open parameter 093 and the conﬁguration lock is opened = value 0.

5. If AKV (stepper) valves are used, you must also select refrigerant via parameter o30.

6. Open parameter r12 and start regulation.

7. When there is a network: set the address for the address switch in the controller.

8. Send this address to the system unit by activating a service pin.

Menu overview:

A display can be connected for each evaporator section. In each display, the following settings/readings can be undertaken for the evaporator section in question.

Parameter name

r12 Main switch:

r22 Select thermostat band:

r37 Setting of cut-out value for the thermostat in section

r38 Setting of cut-out value for thermostat band 2

o30 Setting of refrigerant (must be set if AKV / stepper

o46 Case cleaning function. Set:

P81 Selection of pre-set application group:

o62 (P81 must be set before o62 can be set)

o93 Conﬁguration lock

u17 Actual air temperature for the thermostat in section

u20 Actual temperature at S2 sensor. Section A/B/C/D

u21 Actual superheat. Section A/B/C/D

u24 AKV valve opening degree. Section A/B/C/D

u26 Actual evaporating temperature. Section A/B/C/D

u36 Actual air temperature for product sensor in section

u68 Actual air temperature for alarm thermostat in sec-

X = When the controller is not set up, the display will only read the marked settings

Function At start-

x 0: Controller stopped 1: Regulation

1 = Thermostat band 1 is active 2 = Thermostat band 2 is active

A/B/C/D

x valves are used) 0= not selected, 1=R12. 2=R22. 3=R134a. 4=R502. 5=R717. 6=R13. 7=R13b1. 8=R23. 9=R500. 10=R503. 11=R114. 12=R142b. 13=User def. 14=R32. 15=R227. 16=R401A. 17=R507. 18=R402A. 19=R404A. 20=R407C. 21=R407A. 22=R407B. 23=R410A. 24=R170. 25=R290. 26=R600. 27=R600a. 28=R744. 29=R1270. 30=R417A. 31=R422A. 32=R413A. 33=R422D. 34=R427A. 35=R438A. 36=R513A. 37=R407F. 38=R1234ze. 39=R1234yf. 40=R448A. 41=R449A. 42=R452A.

0: Case cleaning not started 1: Only fan running (evaporator defrost) 2: All outputs are OFF (cleaning may be carried out)

x 1= group 1: o62 + page 98-101 2= group 2: o62 + page 102-105

x Selection of predeﬁned conﬁguration. This setting will give a choice from a series of predeﬁned combinations, which at the same time establish the connection points. At the end of the manual there is an overview of the options and connection points. After conﬁguration of this function, the controller will shut down and restart.

x You can only select a preset conﬁguration or change refrigerant when the conﬁguration lock is open. 0 = Conﬁguration open 1 = Conﬁguration locked

A/B/C/D

tion A/B/C/D

Stepper Motor Valves

When selecting a Danfoss stepper motor valve, all settings are factory set. Here, it is only necessary to select the type of valve. If a valve from other manufacturers is used the following settings has to be made. Get data from the valve manufacturer:

Max Operating Steps.

The number of steps that correspond to a valve position of 100%. This value is limited to a range of 0 - 10,000 steps.

Hysteresis The number of steps needed to correct for mechanical hysteresis when a reduction gear is part of the valve design. This adjustment is only applied, if an additional opening of the valve is requested. If this is the case the valve opens an additional amount equal to this value, before driving the valve in the closing direction by this same value. This value is limited to 0 – 127 steps.

Step Rate

The desired valve drive rate in steps per second. This value is limited to 20 – 500 steps / sec.

Holding Current

The percent of the programmed Max Phase Current that should be applied to each phase of the stepper output when the valve is stationary. If required, this current ensures that the valve maintains its last programmed position. This value is limited to a range of 0 – 70% given in 10% steps.

AKS 32R info

The signal from one pressure transmitter can be received from up to 5 controllers

Graphic display MMIGRS2

Overdrive at Valve Init

During valve initialization, the amount to overdrive the valve, beyond the 0% position, to ensure that the valve has fully closed. This value is limited to a range of 0 - 31%.

Phase Current

The current applied to each phase of the stepper motor during actual valve movement. This value is limited to 7 bits and a range of 0 – 325 mA given in 10ma steps. Verify the range against the stepper valve controller in the actual design. Please be aware, that this value hat to be set in a RMS value. Some valve manufacturers are using peak current!

Soft Landing after Valve Init

At power on the valve is performing a valve Initialization i.e. closing the valve with “Max Operating Steps” plus “Overdrive At Valve Init “steps to generate a zero point calibration of the system . Hereafter a “Soft landing after Valve Init” is made to minimize the closing force on the valve seat with a few opening steps according to setting of “Hysteresis” or min 20 steps

Failsafe Position

During failsafe mode of operation (e.g., resulting from a loss of communications to this module), speciﬁes the default valve position. This value is limited to a range of 0 – 100%.

A display gives access to most of the controller functions . For access, connect the display to the controller and activate the address on MMIGRS2. (A separate power supply does not need to be connected) Power is supplied directly from the controller via the cable.

Setting:

1.Press both the "x" and "enter" buttons and hold in for 5 seconds. The BIOS menu is then displayed.

2. Select the "MCX selection" line and press "enter"

3. Select the "Man selection" line and press "enter"

4. The address will be displayed. Check that it is 001, press "enter". Data will then be collected from the controller.

Light-emitting diodes on the controller

Internal communication between the modules: Quick ﬂash = error Constantly On = error

Status of output 1-8

Slow ﬂash = OK Quick ﬂash = answer from gateway

■ Power

■ Comm

■ DO1 ■ Status

■ DO2 ■ Service Tool

■ DO3 ■ LON

■ DO4 ■ I/O extension

■ DO5 ■ Alarm

■ DO6

■ DO7 ■ Display

■ DO8 ■ Service Pin

remains on for 10 mins after network registration Constantly ON = error Constantly OFF = error

External communication Communication to AK-CM 102

Flash = active alarm/not acknowledged Constant ON = Active alarm/acknowledged

Network installation

Information

The controller oﬀers quite a number of status displays which are invaluable in connection with operational start-up and optimisation.

Thermostat function

Display of S3 air admission Display of S4 air emission Display of weighted S3/S4 thermostat temperature Min., Max. and Average thermostat temperature / 24 hours Average thermostat coupling in % / 24 hours Running time for cutin period in progress or for the last cutin period

Alarm thermostat

Display of weighted S3/S4 alarm temperature Min., Max. and Average alarm temperature / 24 hours Percentage of time where the alarm temperature was outside the limits / 24 hours

Product sensor

Display of the temperature at the product sensor Min., Max and Average of product temperature / 24 hours Percentage of time where the product temperature was outside the limits / 24 hours

Injection function

AKV /ETS/CCMT opening degree in % Average opening degree / 24 hours Evaporating pressure S2 gas temperature Superheat Superheat reference

Defrost

Actual defrost status Degree of icing-up of evaporator Duration of on-going or last defrost Average duration of the last ten defrosts Duration of cooling-down after defrost Defrost sensor temperature Number of planned and skipped defrosts

Compressor

Operating time last 24 hours Total operating time Number of couplings last 24 hours Total number of couplings

Door contact

Door contact status Duration of last opening Number of openings last 24 hours Opening time last 24 hours

Rail heat

Dew point Actual duty cycle

Appliance cleaning

Time of last cleaning Duration of last cleaning

Input and output status

Status display of all inputs and outputs Manual overriding of all outputs

NB: Not all displays are available via AKM – Cf. the AKM menu description for further details.

Regulating status

The controller goes through some regulating situations. You can see the actual situation here. When operating with AK-ST the text is written on the screen for the section. When operating from AKM the operating status is a numerical value. The values are, as follows: 0: Refrigeration stopped from Main Switch 1: Start-up phase for the injection function 2: Adaptive regulation of the superheat 3: 4: Defrost 5: Start-up after defrost 6: Forced closing 7: Injection function failure 8: Sensor error and emergency refrigeration 9: Modulating thermostat control 10: Melting function is active 11: Open door 12: Case cleaning 13: Thermostat cutout 14: Forced refrigeration 15: Shut down

Defrost state During and immediately after a defrost the defrost status will be: 1: Evaporator is emptied 3: Defrost 5: Evaporating pressure is lowered 6: The liquid injection is delayed 7: Fan delay

Installation considerations

Accidental damage, poor installation, or site conditions, can give rise to malfunctions of the control system, and ultimately lead to a plant breakdown. Every possible safeguard is incorporated into our products to prevent this. However, a wrong installation, for example, could still present problems. Electronic controls are no substitute for normal, good engineering practice. Danfoss will not be responsible for any goods, or plant components, damaged as a result of the above defects. It is the installer’s responsibility to check the installation thoroughly, and to ﬁt the necessary safety devices. Particular attention is drawn to the need for a “force closing” signal to controllers in the event of compressor stoppage, and to the requirement for suction line accumulators.

Your local Danfoss agent will be pleased to assist with further advice, etc.

The controller is not built for use on plate heat exchangers.

NH3 + AKVA Please contact Danfoss if you require help concerning the positioning of sensors, transmitters, etc.

Alarm texts

Setting of priority Default

Temperature alarms

High air temp. A

Low air temp. A

Frost protect A

High Prod. temp. A

Low prod. temp. A

Same for B,C,D

Sensor errors

Pe sensor error

S2A sensor error

S3A sensor error

S4A sensor error

S5-1A sensor error

S5-2A sensor error

Prod. sensor error A

Same for B,C,D

Saux1 sensor error

Saux2 sensor error

Saux3 sensor error

Saux4 sensor error

Pc sensor error

Paux1 sensor error

Paux2 sensor error

Paux3 sensor error

priority

High

Low Po sensor error

High S2A sensor error (B,C,D)

High S3A sensor error (B,C,D)

High S4A sensor error (B,C,D)

High S5-1A sensor error (B,C,D)

High S5-2A sensor error (B,C,D)

High Product temp. A sensor error

High Saux1 sensor error

High Saux2 sensor error

High Saux3 sensor error

High Saux4 sensor error

High Pc sensor error

High Paux1 sensor error

High Paux2 sensor error

High Paux3 sensor error

Alarm text Description

High air temp. (A,B,C,D) The air temperature has been above the high alarm limit for longer time than set delay

Low air temp. (A,B,C,D) The air temperature has been below the low alarm limit for longer time than set delay

Frost protection, too low S4 (A,B,C,D)

High Prod. temp. (A,B,C,D) The product temperature has been above the high alarm limit for longer time than set delay

Low prod. temp. (A,B,C,D) The product temperature has been below the low alarm limit for longer time than set delay

The air oﬀ temperature (S4) is below the set frost protection limit

Pressure transmitter signal for evaporating pressure faulty

S2A temp. sensor signal faulty

S3A temp. sensor signal faulty

S4A temp. sensor signal faulty

S5-1A temp. sensor signal faulty

S5-2A temp. sensor signal faulty

Product temp. sensor signal faulty

(B,C,D)

Saux1 temp. sensor signal faulty

Saux2 temp. sensor signal faulty

Saux3 temp. sensor signal faulty

Saux4 temp. sensor signal faulty

Pressure transmitter signal for condensing pressure faulty

Paux1 pressure transmitter signal faulty

Paux2 pressure transmitter signal faulty

Paux3 pressure transmitter signal faulty

Various alarms

Standby mode

Medium Control stopped,

The control has been stopped via the setting ”Main switch” = ON or via the ex ternal Main switch input

MainSwitch=OFF

Refrigerant changed

Refrigerant leak alarm Refrigerant leak A signal is being received from a leak detector

Low Refrigerant changed

The refrigerant setting has been changed

(The alarm relay on AK-CC 750A will not be activated)

Case cleaning

Door open pre alarm

Door open alarm

Injection problem A, B, C, D

Max def period A,B,C,D

High Case cleaning initiated

Low Door open pre alarm

Medium Door open alarm

Medium Injection problem (A,B,C,D)

Low Max defrost time exceeded

A case cleaning has been initiated

The door has been open for longer time than 75% of the set alarm delay

The door has been open for longer time than set alarm delay

The AKV valve can not control the superheat of the evaporator

The last defrost cycle has terminated on time instead of temperature

(A,B,C,D)

Max fan del exceeded A,B,C,D

Max hold time A,B,C,D

Air ﬂow alarm A,B,C,D

AD – Case A not defrosted (B,C,D)

AD – Fault case A,B,C,D

Low Max fan del ay time exceeded

(A,B,C,D)

Low Max defrost hold time

(A,B,C,D)

Low AD - Case X - Air ﬂow reduced

Low AD - Case X not defrosted

Low AD - Sensor error A,B,C,D

The fans have been started on time instead of temperature after a defrost

After a defrost cycle the evaporator has restarted cooling as it did not get a release signal via the defrost coordination setup in the network manager (AKA gateway)

The air ﬂow at the evaporator is greatly reduced – either as a consequence of severe ice formation, a fan fault or other obstruction.

The air ﬂow is continuously reduced after defrost has been carried out

Tuning problem in adaptive defrost

AD – Flash gas evapora.

Low AD – Flash gas detect A,B,C,D

A,B,C,D

General alarms

Thermostat x – Low temp. alarm

Thermostat x – High temp. alarm

Pressostat x – Low pressure alarm

Pressostat x – High pressure alarm

Voltage input x – Low alarm

Voltage input x – High alarm

DIx alarm input

Low Thermostat x - Low alarm

Low Thermostat x - High alarm

Low Pressostat x - Low alarm

Low Pressostat x - High alarm

Low Analog input x - Low alarm

Low Analog input x - High alarm

Low DIx alarm

Stepper valve High Stepper - Inj. A, B, C. D.

Open coil, Shorted output, Error, Power failure

System alarms

The alarm priority can not be altered on system alarms

Medium Clock has not been set

Medium System Critical exception

Medium System alarm exception

Medium Alarm destination disabled

Medium Alarm route failure

High Alarm router full

Medium Device is restarting

Medium IO module error

Low Manual override IO

Flash gas has been detected at the valve for a relatively long time

The temperature for thermostat no. x has been below the low alarm limit for longer time than set delay

The temperature for thermostat no. x has been above the high alarm limit for longer time than set delay

The pressure for pressostat no. x has been below the low alarm limit for longer time than set delay

The pressure for pressostat no. x has been above the high alarm limit for longer time than set delay

The voltage signal has been below the low alarm limit for longer time than set delay

The voltage signal has been above the high alarm limit for longer time than set delay

Alarm on general alarm input DI x

Check supply to the actual valve

Time has not been set

A unrecoverable critical system failure has occurred – exchange the controller

A minor system failure has occurred – power oﬀ controller

When this alarm is activated the alarm transmission to the alarm receiver has been deactivated. When the alarm is cleared the alarm transmission to the alarm receiver has been activated.

Alarms can not be transmitted to alarm receiver – check communication

The internal alarm buﬀer has an overrun – this might occur if the controller can not send the alarms to the alarm receiver. Check communication between controller and AKA gateway.

The controller is restarting after ﬂash updating of the software

There is a communication fault between the controller module and the extension modules – the fault must be corrected as soon as possible

The input/ output in question has been put in manual control mode via the AK-ST 500 service tool software

Appendix - Recommended connection Group 1

Function

The controller has a setting where you can choose between various types of installation. If you use these settings, the controller will suggest a series of connection points for the diﬀerent functions. These points are shown below.

Even if your installation is not 100% as described below, you can still use the function. After use, you need only adjust the divergent settings. The given connection points in the controller can be changed if you wish.

Room

Appl.

No. of

Def.

type

AKV

type

Air sensor

Controller - (Module no. 1 point 1-19) Module 2= AK-XM 205) App.no at setting

AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8 AI9 AI10 AI11 DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8 AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8 DO1

pt1 pt2 pt3 pt4 pt5 pt6 pt 7 pt8 pt 9 pt10 pt 11 pt 12 pt 13 pt 14 pt 15 pt 16 pt 17 pt 18 pt 19 pt1 pt2 pt3 pt4 pt5 pt6 pt 7 pt8 pt 9 pt10 pt 11 pt 12 pt 13 pt 14 pt 15 pt 16 High

Room 1 Air S3 S2A S3A For. cl. Door Main s. Po AKV A Light Rail heat Comp. Fa n Alarm 1

Room 1 El S3 S2A S3A S5A For. cl. Door Main s. Po AKV A De f. Light Rail heat Comp. Fan Alarm 2 3

Room 1 Gas S3 S2A S3A S5A For. cl. Door Main s. Po AKV A Def. Drain Suction Rail heat Comp. Fan Alarm 4 5

Room 2 Air S3 S2A S3A S2B For. cl. Door Main s. Po AKV A AKV B Light Rail heat Comp. Fan Alarm 6

Room 2 El S3 S2A S3A S5A S2B S5B For. cl. Door Main s. Po AKV A AKV B Def. A Def. B Rail heat Comp. Fa n Alarm 7 8

Room 2 El S3 S2A S3A S5A S2B S5B For. cl. Door Main s. Po AKV A AKV B Def. A Def. B Light Comp. Fan Alarm 47 48

Room 2 Gas S3 S2A S3A S5A S2B S5B For. cl. Door Main s. Po AKV A AKV B Def. A Def. B Rail heat Comp. Fa n Alarm Suction Drain

Room 2 Gas S3 S2A S3A S5A S2B S5B For. cl. Door Main s. Po AKV A AKV B Def. A Def. B Suction Comp. Fan Alarm 9 11

Room 3 Air S3 S2A S3A S2B S2C For. cl. Door Main s. Po AKV A AKV B AKV C Light Rail heat Comp. Fan Alarm 13

Room 3 El S3 S2A S3A S5A S2B S5B For. cl. Door Main s. Po AKV A AKV B AKV C Def. A Def. B Def. C Rail heat Comp. Fa n Alarm

Room 3 Gas S3 S2A S3A S5A S2B S5B For. cl. Door Main s. Po AKV A AKV B AKV C Def. A Def. B Def. C S2C S5C Rail heat Comp. Fan Alarm Suction Drain

Room 4 Air S3 S2A S3A S2B S2C S2D For. cl. Door Main s. Po AKV A AKV B AKV C AKV D Rail heat Comp. Fan Alarm 18

Room 4 El S3 S2A S3A S5A S2B S5B For. cl. Door Main s. Po AKV A AKV B AKV C AKV D Def. A Def. B Def. C Def. D S2C S5C S2D S5D Rail heat Comp. Fan Alarm 19 20

Room 4 Gas S3 S2A S3A S5A S2B S5B For. cl. Door Main s. Po AKV A AKV B AKV C AKV D Def. A Def. B Def. C Def. D S2C S5C S2D S5D Rail heat Comp. Fan Alarm Suction Drain

DO2 DO3 DO4 DO5 DO6 DO7 DO8

via AKM or display

temp.

Low temp.

Light

10 12

14 15

16 17

21 22

Cases

Appl.

No. of

Def.

type

AKV

1 Air S3 + S4 S2A S3A S4A For. cl. Main s. Po AKV A Light Rail heat Comp. Fan Alarm 23

1 Air S3 + S4 S2A S3A S4A Blinds For. cl. Main s. Po AKV A Light Blinds Rail heat Comp. Fan Alarm 69

1 El S3 + S4 S2A S3A S4A S5A For. cl. Main s. Po AKV A Def. A Light Rail heat Comp. Fa n Alarm 24 25

2 evap. 1 El S3 + S4 S2A S3A S4A S5-1A S5-2A S6A For. cl. Main s. Po AKV A Def. A Light Rail heat Comp. Fan Alarm 52

1 El S3 + S4 S2A S3A S4A S5A Blinds For. cl. Main s. Po AKV A Def. A Light Blinds Rail heat Comp. Fan Alarm 65

CO21 El S3 + S4 S2A S3A S4A S5A For. cl. Main s. Po AKV A Def. A Light Rail heat Comp. Fa n Alarm 54

CO2

1 El S3 + S4 S2A S3A S4A S5-1A S5-2A S6A For. cl. Main s. Po AKV A Def. A Light Rail heat Comp. Fa n Alarm 59

2 evap.

1 Gas S3 + S4 S2A S3A S4A S5A For. cl. Main s. Po AKV A Def. Drain Suction Rail heat Comp. Fan Alarm 26 27

1 Gas S3 + S4 S2A S3A S4A S5A For. cl. Main s. Po AKV A Def. Drain Suction Light Comp. Fan Alarm 45 46

1 Gas S3 + S4 S2A S3A S4A S5A For. cl. Main s. Po AKV A Def. Blinds Rail heat Comp. Fan Alarm Suction Drain

2 Air S3 + S4 S2A S3A S4A S2B S3B S4B For. cl. Main s. Po AKV A AKV B Light Rail heat Comp. Fa n Alarm 28

2 Air S3 + S4 S2A S3A S4A S2B S3B S4B Blinds For. cl. Main s. Po AKV A AKV B Light Blinds Rail heat Comp. Fan Alarm 70

2 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B Def. A Def. B Rail heat Comp. Fan Alarm 29 30

2 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B Def. A Def. B Light Comp. Fa n Alarm 49 50

2 evap. 2 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B Def. A Def. B S6A S6B S5-2A S5-2B Rail heat Comp. Fa n Alarm

2 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B Def. A Def. B Blinds Rail heat Comp. Fan Alarm

CO22 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B Def. A Def. B Rail heat Comp. Fan Alarm 55

CO22 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B Def. A Def. B Rail heat Comp. Fan Alarm

CO2

2 El S3 + S4 S2A S3A S4A S5-1A S2B S3B S4B S5-1B For. cl. Main s. Po AKV A AKV B Def. A Def. B S6A S6B S5-2A S5-2B Rail heat Comp. Fan Alarm

2 evap.

2 Gas S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B Def. A Def. B Suction Comp. Fan Alarm 31 33

2 Gas S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B Def. A Def. B Rail heat Comp. Fa n Alarm Suction Drain

2 Gas S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B Def. A Def. B Blinds Rail heat Comp. Fan Alarm Suction Drain

3 Air S3 + S4 S2A S3A S4A S2B S3B S4B S2C S3C S4C Main s. Po AKV A AKV B AKV C Light Rail heat Comp. Fan Alarm 35

3 Air S3 + S4 S2A S3A S4A S2B S3B S4B For. cl. Main s. Po AKV A AKV B AKV C Rail heat Comp. Fan Alarm S2C S3C S4C

3 Air S3 + S4 S2A S3A S4A S2B S3B S4B Blinds For. cl. Main s. Po AKV A AKV B AKV C Rail heat Comp. Fa n Alarm S2C S3C S4C

3 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B AKV C Def. A Def. B Def. C S2C S3C S4C S5C Rail heat Comp. Fan Alarm

3 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B AKV C Def. A Def. B Def. C S2C S3C S4C S5C Blinds Rail heat Comp. Fa n Alarm

CO23 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B AKV C Def. A Def. B Def. C S2C S3C S4C S5C Rail heat Comp. Fan Alarm

3 Gas S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B AKV C Def. A Def. B Def. C S2C S3C S4C S5C Rail heat Comp. Fa n Alarm Suction Drain

3 Gas S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B AKV C Def. A Def. B Def. C S2C S3C S4C S5C Blinds Rail heat Comp. Fan Alarm Suction Drain

4 Air S3 + S4 S2A S3A S4A S2B S3B S4B For. cl. Main s. Po AKV A AKV B AKV C AKV D Rail heat Comp. Fan Alarm S2C S3C S4C S2D S3D S4D

4 Air S3 + S4 S2A S3A S4A S2B S3B S4B Blinds For. cl. Main s. Po AKV A AKV B AKV C AKV D Rail heat Comp. Fa n Alarm S2C S3C S4C S2D S3D S4D

4 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B AKV C AKV D Def. A Def. B Def. C Def. D S2C S3C S4C S5C S2D S3D S4D S5D Rail heat Comp. Fan Alarm

CO24 El S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B AKV C AKV D Def. A Def. B Def. C Def. D S2C S3C S4C S5C S2D S3D S4D S5D Rail heat Comp. Fan Alarm

4 Gas S3 + S4 S2A S3A S4A S5A S2B S3B S4B S5B For. cl. Main s. Po AKV A AKV B AKV C AKV D Def. A Def. B Def. C Def. D S2C S3C S4C S5C S2D S3D S4D S5D Rail heat Comp. Fa n Alarm Suction Drain

4 Gas S3 + S4 S2A S3A S4A S5A S2B S3B S4B For. cl. Main s. Po AKV A AKV B AKV C AKV D Def. A Def. B Def. C Def. D S2C S3C S4C S5C S2D S3D S4D S5D Rail heat Comp. Fa n Alarm Suction Drain

type

Air sensor

Controller - (Module no. 1 point 1-19) Module 2= AK-XM 205) App.no at setting

AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8 AI9 AI10 AI11 DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8 AI1 AI2 AI3 AI4 AI5 AI6 AI7 AI8 DO1

pt1 pt2 pt3 pt4 pt5 pt6 pt 7 pt8 pt 9 pt10 pt 11 pt 12 pt 13 pt 14 pt 15 pt 16 pt 17 pt 18 pt 19 pt1 pt2 pt3 pt4 pt5 pt6 pt 7 pt8 pt 9 pt10 pt 11 pt 12 pt 13 pt 14 pt 15 pt 16 High

Danfoss AK-CC 750A User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

1. Introduction

Application

Principles

2. Design of a controller

Module survey

Common data for modules

Controller

Extension module AK-XM 101A

Extension module AK-XM 102A / AK-XM 102B

Extension module AK-XM 103A

Extension module AK-XM 204A / AK-XM 204B

Extension module AK-XM 205A / AK-XM 205B

Extension module AK-XM 208C

Extension module AK-OB 110

Display module EKA 163B / EKA 164B

Graphic display MMIGRS2

Power supply module AK-PS 075 / 150

Communication module AK-CM 102

Preface to design

Functions

Connections

Limitations

Design of a evaporator control

Procedure:

Sketch

Evaporator and refrigerator appliance functions

Connections

Planning table

Length

Linking of modules

Determine the connection points

Connection diagram

Supply voltage

Ordering

3. Mounting and wiring

Mounting

Mounting of extension module on the basic module

Wiring

Connect PC

Authorization

System setup

Set plant type

Setup general alarm inputs

Setup separate thermostat functions

Setup separate voltage functions

Set alarm priorities

Check of connections

Check of settings

Installation in network

First start of control

Start the control

Setup logs

Manual defrost

5. Regulating functions

Introduction

Temperature alarms

Common functions

General monitoring functions

Liquid injection

Defrost

Miscellaneous

Information

Alarm texts

Appendix - Recommended connection Group 1