Danfoss AK-CC 750A User guide

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
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
Functions ............................................................................................30
Connections ...................................................................................... 31
Limitations ......................................................................................... 31
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
3. Mounting and wiring .............................................................41
Mounting ................................................................................................... 42
Mounting of extension module on the basic module ....... 42
Wiring .......................................................................................................... 43
4. Configuration and operation ................................................45
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
Start the control ...............................................................................72
Setup logs .......................................................................................... 73
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
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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.
PIN
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
S
Pt 1000 ohm/0°C
S2, S3 S4,
Pt 1000 S5 Saux
P
AKS 32R AKS 2050
AKS 32
U
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
DO
AKV
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
1
Active at:
On
/
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
S
Pt 1000 ohm/0°C
P
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
U
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
DI
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
S
Pt 1000 ohm/0°C
S2 S3 S4 S4 S5 Saux
P
AKS 32R
AKS 32
3: Brown
2: Blue
1: Black
3: Brown
2: Black
1: Red
P0
Paux
U
...
On/Off Ext.
Main switch Day/ Night
Door Level switch
AO
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
DO
Signal Active at
Fan Alarm Light Railheat Defrost Night blind Valve Compres­sor
On
/
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
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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
S
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
P
AKS 32R AKS 2050
AKS 32
U
On/Off
DO
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:
on
/
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 VAAK-PS 075
Fx: 7.8 + (4 x 5.1) = 28.2 VAAK-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
AO 0 - 10 V
Module
Point 24 25
Type AO1 AO2
1
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
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
1

Sketch

Make a sketch of the system in question.
2

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
x
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
3

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
4

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
7
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
5
Missing connections, if applicable 4 -
The missing connections to be updated from one or more extension modules: Sum of power
6
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
8

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
9

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
10

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
1
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
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
AKS32R-12
-
-
-
ON
ON
ON
ON
ON
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
2
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
Pt 1000
Closed
Closed
AK-CC 750A RS8HP102 © Danfoss 2018-09 37
11

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
1
3 x EKA 163B
S3C
S4B
S3B
S4A
3
567 8
2
4
121314
AKV A
S4C
AKV B
S5A
AKV C
15
Fans
1
16
S5B
9
Def. A
S5C
10
17
S2A
11
Def.. B
18
P0
Def.. C
19
S2B
Start/stop
S2C
Case cleaning
3
1
2
4
2
Rail heat
38 RS8HP102 © Danfoss 2018-09 AK-CC 750A
12

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
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)
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
continued
Example
X
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
1
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
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
Pt 1000
AKS32R-12
-
-
-
ON
ON
ON
ON
ON
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)
2
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
Pt 1000
Closed
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
Login with user name SUPV
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
next page
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
next page
4. Set the functions in another display
Example: The settings are shown here in the 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
next page
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
High alarm limit
Alarm delay high
Time delay for high alarm
Alarm text high
Indicate alarm text for the high alarm
Low alarm limit
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
next page
4. Setup On/off input functions
Press the +-button to go on to the
next page
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
Mod­ule
Point Active at
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.
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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
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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.
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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.
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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.
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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.
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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
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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
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5. Regulating functions

This section describes how the different functions work
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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
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.
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
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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)
AK-CC 750A RS8HP102 © Danfoss 2018-09 77
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 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.)
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.
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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.
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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.
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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
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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.
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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.
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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”.
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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.
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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.
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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:
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- 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).
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• 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,
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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
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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.
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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.
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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-
up
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
A/B/C/D
tion A/B/C/D
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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
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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.
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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
High
High
High
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
96 RS8HP102 © Danfoss 2018-09 AK-CC 750A
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
AK-CC 750A RS8HP102 © Danfoss 2018-09 97

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
98 RS8HP102 © Danfoss 2018-09 AK-CC 750A
DO2 DO3 DO4 DO5 DO6 DO7 DO8
via AKM or display
temp.
Low temp.
Light
Light
Light
Light
10 12
14 15
16 17
21 22
AK-CC 750A RS8HP102 © Danfoss 2018-09 99
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
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
100 RS8HP102 © Danfoss 2018-09 AK-CC 750A
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