Danfoss AK-CC55 Multi Coil User guide

User Guide
Case/room controller (EEV)
Type AK-CC55 Multi Coil
SW Ver. 1.8x
For refrigeration appliances and cold storage rooms.
AK-CC55 Multi Coil

Contents

Introduction 5
Portfolio overview 6
Connectivity 7
Controller functionality 9
Functions 9
Defrost 12
Rail heat 14
Night blind 15
Display 18
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AK-CC55 Multi Coil
Override 19
Applications 20
Product identication 23
Data communication 23
AKV info 24
External solid state relay for rail heat 24
AKS 32R info 24
Coordinated defrost via cable connections 25
External display AK-UI55 25
Connections 25
Operation 28
Parameter groups when operating via display 30
Get a good start 30
AK-UI55 display menu (SW ver. 1.8x) 32
Thermostat 32
Defrost 32
Fan control 33
Control 35
DO cong and manual 36
Service 37
Operation via AK-UI55 Bluetooth 39
AK-CC55 connect menu (SW ver. 1.8x) 40
Start / Stop 40
Conguration 40
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AK-CC55 Multi Coil
Fan control 50
Advanced 54
Operating status 58
Product specication 59
Electrical specications 59
Sensor and measuring data 59
Input and output relay specications 59
Function data 60
Environmental conditions 60
Dimensions 60
Certicates, declarations, and approvals 61
Online support 63
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S4/S4B/S4C
P
AKV
S2/S2B/S2C
S5/S5B
Danfoss
84B3293
AK-CC55 Multi Coil

Introduction

Application
Complete refrigeration appliance control with great exibility to adapt to refrigeration appliances and cold storage rooms.
Advantages:
• Universal controller for control of up to 3 AKV valves in same refrigeration section
• Quick set-up with predened settings
• Easy conguration and service using a mobile app with Bluetooth
• Energy optimization of the whole refrigeration appliance
• Adaptive Minimum Stable Superheat (MSS) control is performed with lowest possible superheat
• Allows the suction pressure to be raised several degrees
• Adaptive Liquid Control (ALC) can be performed with superheat down to 0 degrees on transcritical CO2 systems with liquid ejectors
Principle
The temperature in the appliance is registered by one to three S4 air temperature sensors which can be located in the air ow of the evaporator. A setting for display read-out determines, if thermostat A temperature, the average S4 temperature or the highest S4 temperature is read out in the display.
If two displays are connected, it can be selected to read-out thermostat A temperature in display 1 and thermostat B temperature in display 2.
The temperature of the evaporator is registered with one or two S5 sensors which can be used as a defrosting sensor.
In addition to the outputs of the electronic AKV injection valves, the controller has relay outputs which are dened by the application setting.
Figure 1: AK-CC55 with evaporator, AKV valve and sensor positions
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AK-CC55 Compact
AK-CC55 Single Coil
AK-CC55 Single Coil UI
AK-CC55 Multi Coil
Product image
Valve
1 x TXV or AKV
1 x AKV
1 x AKV
3 x AKV
Digital Output3554
Digital input
1 (2)
3 (2)
3 (2)
3 (2)
Analogue Output1111
Analogue Input
5 (4)
6 (7)
6 (7)
6 (7)
Display
1 remote
2 remote
1 remote + 1 Integrated
2 remote
Comm. module
Modbus
Modbus
Modbus
Modbus
Optional comm. module
LON module
LON module
LON module
Application
AK-CC55 Compact
AK-CC55 Single Coil
AK-CC55 Single Coil UI
AK-CC55 Multi Coil
AKV - application (electrically operated expansion valve)
xxx
0 – 10 V to control external stepper driver
x
TXV - application (thermostatic expansion valve + solenoid valve or compressor)
x
Remote hot gas - application
x
One valve, one evaporator, one refrigeration section
xxx
One valve, one evaporator, two refrigeration sections
x
One valve and two evaporators, two refrigeration sections
x
Two valves and two evaporators (same refrigeration section)
x
Three valves and three evaporators (same refrigeration section)
x
Custom conguration of relay outputs
x
x
Two compressorsxx
Heating functionxx
x
Control of air humidity
x
x
Adaptive superheat
xxx
Adaptive liquid control (zero superheat control for transcritical CO2 systems with liquid ejectors)
xxx
Adaptive defrosting
x
Product sensor
x
RS485 Lon, option (AK-OB55)
x
x
AK-CC55 Multi Coil

Portfolio overview

The AK-CC55 portfolio contains four controllers with dierent functionalities and application settings, as outlined in the table.
Table 1: AK-CC55 Portfolio

Function overview

Table 2: AK-CC55 function overview by type
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Compact
System Manager
AKA 245: LON units only and max 250 controller parameters
Multi Coil
KoolProg
Single Coil UI
AK-UI Info
AK-UI Set
AK-UI Bluetooth
Bluetooth
AK-CC55 Connect
Smart Device (IOS
or Android)
Modbus
LON/ TCP/IP (SNMP)
Display Bus
Modbus
LON/ TCP/IP (SNMP)
Modbus
Case Controller Remote Display Service App
AK-CC55 Multi Coil

Connectivity

The diagram outlines the connectivity options presented by AK-CC55 for the design of system functionality.
Figure 2: Connectivity

Data communication

The controller has built-in MODBUS data communication. If there is a requirement for a dierent form of data communication, a Lon RS 485 module can be inserted in the controller.
The connection must then be to the module.
Figure 3: Mounting of communication module
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Standard enclosure. Typically used for display cases where the controller is mounted in a tray.
Danfoss
84B8236
The standard enclosure can be expanded with one or two external displays.
Danfoss
84B8238

AK-CC55 Multi Coil

AK-CC55 Multi Coil
AK-CC55 Multi Coil – Controlling up to 3 AKV valves.
An application mode setting will congure inputs and outputs for the desired use. There are ve applications to choose from.

External display

There are three versions available with dierent functions:
• AK-UI55 Info: Temperature display.
• AK-UI55 Set: Temperature display with control buttons on the front.
• AK-UI55 Bluetooth: Temperature display with Bluetooth communication, for use with AK-CC55 Connect Mobile app.
Figure 4: AK-UI55 Info Figure 5: AK-UI55 Set Figure 6: AK-UI55 Bluetooth
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Dry expansion (MSS Control)
Adaptive liquid control (ALC)
AK-CC55 Multi Coil

Controller functionality

Functions

• Day/night thermostat with ON/OFF or modulating principle
• Switch between thermostat settings via digital input
• Adaptive control of superheat
• Start of defrost via schedule, digital input, network or setting display
• Natural or electric defrost
• Stop of defrost on time and/or temperature
• Coordination of defrosting among several controllers in a line-up
• Pulsing of fans when thermostat is satised
• Appliance cleaning function for documentation of HACCP procedure
• Rail heat control via day/night load or dewpoint
• Humidity control in cold storage rooms
• Door function
• Control of night blinds
• Light control
• Heat thermostat
• High accuracy inputs will guarantee a better measuring accuracy than stated in the standard EN ISO 23953-2 without subsequent calibration (Pt 1000 ohm sensor)
• Integrated MODBUS communication with the option of mounting a LonWorks communication card

Liquid injection by use of AKV

Liquid injection in the evaporator is controlled by an electronic injection valve of the type AKV. The valve operates as both expansion valve and solenoid valve. The controller opens and closes the valve based on sensor readings.
The function contains an adaptive algorithm which independently adjusts the valve’s opening so that the evaporator constantly supplies optimum amount of refrigerant.
Superheat is measured via:
Pressure sensor Pe and temperature sensor S2. By using a pressure sensor, and temperature sensor a correct measurement of superheat is achieved under all conditions which ensures a very robust and precise control. The signal from one pressure transmitter can be shared by max. 10 controllers, but only if there is no signicant pressure dierence between the evaporators in question.
There are two parallel settings for superheat:
• Dry expansion, which does not allow liquid ow on the outlet of the evaporator.
• Adaptive liquid control in transcritical CO2 systems, which allows liquid ow. This type of control requires that the controller receives an on/o signal from (for example) a suction accumulator in the suction line. A level switch in the tank will register when the liquid level exceeds the max. level. When this happens, the controller will switch to dry expansion, and then back to liquid control when the liquid level has dropped. The function is dened in setting o02, o37 or o84.
The function can also be activated via data communication from a system unit. If the adaptive liquid control signal is lost, the controller will automatically switch back to dry expansion.
Table 3: Liquid injection
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ON/OFF control
Modulating control
Danfoss
80Z8134
AK-CC55 Multi Coil
WARNING:
Accidental actuation may allow liquid throughput to the compressor. 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.

Temperature control

The temperature in the appliance is registered by one up to three S4 air temperature sensors.
The actual temperature control can take place in three ways (same thermostat set point used for all evaporators):
1.
As an ON/OFF regulation with a dierential using the individual S4 sensor per evaporator.
2.
As a modulating control, using the individual S4 sensor per evaporator.
3.
As one ON/OFF thermostat common for all evaporators. It can be selected to use:
the S4A air temperature sensor,the average of all S4 air temperature sensors,the highest value of all S4 air temperature sensors for the common thermostat.
There is, however, a limit to the use of a modulating control as it can only be used in remote cabinets. It is not recommended to use modulating thermostat control in low temperature applications. In applications with one evaporator and one compressor the thermostat function with ON/OFF control should be selected. In remote cabinets, the thermostat function may either be selected for ON/OFF control or modulating control.
Table 4: Control methods

Temperature monitoring

The individual S4A, S4B and S4C air sensors are always used for temperature alarm monitoring independent of which sensor is dened as thermostat sensor. Common settings for High temperature limit, Low temperature limit and alarm delays are used for all 3 sensors, and alarms are generated for each individual evaporator section. A longer time delay can be set for high temperature alarm. This time delay is active for pull-down after defrosting, appliance cleaning and start-up.

Thermostat bands

Thermostat bands can be used benecially for appliances where dierent product types are stored, which requires dierent temperature conditions. It is possible to change between the two dierent thermostat bands via a contact
signal on a digital input. Separate thermostat and alarm limits can be set for each thermostat band.
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AK-CC55 Multi Coil
Figure 7: Thermostat band function with two dierent band settings

Night setback of thermostat value

In refrigeration appliances there may be big load dierences between the shop’s opening and closing hours, especially if night lids/blinds are used. The thermostat reference may be raised here without it having any eect on the product temperature.
Change-over between day and night operation can take place as follows:
• via an external switch connected to a digital input
• via a signal from the data communication system
Figure 8: Thermostat band function with Night setback

Appliance cleaning

This function makes it easy for the shop’s sta to carry out a cleaning of the appliance according to a standard procedure. Appliance cleaning is activated via a pulse signal – as a rule via a key switch placed on the appliance or via the AK-CC55 Connect mobile app.
Appliance cleaning is carried out via three phases:
1.
At the rst 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, o97 setting.
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.
There are no temperature alarms during appliance cleaning.
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-++°C1÷+
Fan2÷÷O3++°C
AK-CC55 Multi Coil
Table 5: Appliance cleaning function

Appliance shutdown

The function closes the AKV valve and all outputs are switched o. The cooling appliance is stopped like the “Main switch”, but this happens without an “A45 standby alarm”. The function can be enabled by a switch on the DI input or via a setting through data communication.

Defrost

Depending on the application, you may choose between the following defrost methods: Natural: Here the fans are kept operating during the defrost Electric: The heating element is activated

Start of defrost

A defrost can be started in dierent ways:
Interval:
Defrost is started at xed time intervals like e.g. every eighth hour. An interval must ALWAYS be set to a "higher" value than the period set between two defrostings when a schedule or network signal is used.
Week schedule:
Here defrost can be started at xed times of the day and night. However, max. 6 defrosts per day.
Contact:
Defrost is started with a contact signal on a digital input.
Figure 9: Defrost start
Network:
The defrost start signal is received from a system manager via data communication.
Max. thermostat runtime:
When the aggregate time has passed a preset value, a defrost will be initiated.
Manual:
An extra defrost can be activated from the defrost button on the AK-UI55 Set display or via a parameter setting. All the mentioned methods can be used in parallel – if just one of them is activated, a defrost will be started.

Stop of defrost

Defrosting can be stopped by either:
• Time
• Temperature (with time as safety)
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System manager
Max 10.
Danfoss
84B8268
AK-CC55 Multi Coil

Fan control during defrost

The fans can be stopped or operated during defrosting. They can also run and then be stopped at a set temperature. The temperature signal is obtained from the defrost stop sensor.

Defrost sequence

1.
Pump down
2.
Defrost
3.
Waiting position after defrost
4.
Drip o
5.
Delay of fan

Real-time clock

The controller has a built-in real-time clock which can be used to start defrosts. This clock has a power reserve of four days.
If the controller is equipped with data communication, the clock will automatically be updated from a Danfoss system manager.

Coordinated defrost

There are two ways in which coordinated defrost can be arranged.
Figure 10: Coordinated defrost options
Either with wire connections between the controllers or via data communication:
Wire connections
The digital input DI2 must be congured for coordinated defrost and wiring must be connected between the relevant controllers. When one controller starts a defrost, all the other controllers will follow suit and likewise start a defrost. After the defrost, the individual controllers will move into waiting position. When all are in waiting position there will be a change-over to refrigeration.
Coordination via data communication
Here the system manager handles the coordination. The controllers are gathered in defrosting groups and the system manager ensures that defrosting is started in the group according to a weekly schedule.
When a controller has completed defrosting, it sends a message to the system manager and then goes into a waiting position. When every controller in the group is in a waiting position, refrigeration is again permitted in all the individual controllers.

Melt function

This function will prevent the air ow in the evaporator from being reduced by frost created by uninterrupted operation for a long time.
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AK-CC55 Multi Coil
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 ow and hence the evaporator’s capacity will be greatly improved.

Rail heat

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.
Relay or analogue output
A relay output can be used when long cycle times are permitted. If fast pulsing is required, the AO1/PWM output can be used. The output must be connected to an external power solid state relay. The cycle time must be congured for the relay output in o43 or for analogue output in P82.
Pulse control according to day and night
Various ON periods can be set for day and night operation. A cycle time is set as well as the percentage part of the period in which the rail heat is ON.
Figure 11: Rail heat control, day/night load
Pulse control according to dewpoint
In order to use this function, a system manager of the type AK-SM is required which can measure ambient temperature and humidity to calculate dew point and distribute to the appliance controllers. For this the rail heat’s ON period is controlled according to the distributed dewpoint.
Two dew point values are set in the appliance control:
• One where the eect must be max. i.e. 100%. (o87)
• One where the eect must be min. (o86)
At a dewpoint which is equal to or lower than the value in 086, the eect will be the value indicated in o88. In the area between the two dew point values, the controller will manage the power to be supplied to the rail heat.
Figure 12: Rail heat control, dew point
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AK-CC55 Multi Coil
During defrosting
During defrosting rail heat can be selected to be OFF, ON or run normal control as selected in setting d27.

Fan pulse control

To obtain energy savings, it is possible to pulse control the power supply to the evaporator fans. Pulse control can be accomplished in one of the following ways:
• during the thermostat’s cut-out period (cold room)
• during night operation and during the thermostat’s cut-out period (appliance with night blinds) (The function is not actual when r14=2, i.e. modulating regulation).
A period of time is set as well as the percentage of this period of time where the fans have to be operating.
Figure 13: Fan cycle time
Cut-out of fans during plant breakdowns
If the refrigeration in a breakdown situation stops, the temperature in the cold room may rise quickly as a result of the emission of heat 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 fans will start running again when the S5 temperature has dropped 2K below the set limit. (The function can also be used as a type of MOP function. Here the load on the compressors is limited until the S5 temperature has fallen below the congured value).

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 blind.
The light function can be dened in several ways:
• The light is controlled via a signal from a door contact. The light is kept on for a set time after the door has been closed.
• The light is controlled via the day/night function
• The light is controlled via a DI input or remote light control from a system manager.
• The light is controlled via the data communication from a system manager.
Here there are two operational options if data communication should fail:
• The light can go ON
• The light can stay in its current mode
The light load must be connected to the NC terminals on the relay. This ensures that the light remains ON in the appliance if power to the controller should fail. A setting denes how light is controlled when regulation is stopped via r12 Main switch = OFF (see o98). The light is switched o when the appliance cleaning function is activated.

Night blind

Motorised night blinds can be controlled automatically from the controller via the NO connector on the light relay. The night blinds will follow the status of the light function. When the light is switched on, the night blinds open, and when the light is switched o, 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 pulse signal is activated, the night blinds will open and the refrigeration appliance can be lled with new products. If the pulse signal is activated again, the blinds close.
A night blind is opened when the appliance cleaning function is activated.
A setting can dene that the night blind is opened when "r12" (Main switch) is set to o (see o98).
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Temperature
Time
Humidity max temp.
Diff.
Diff.
Humidity min temp.
Humidity
control
enabled
Danfoss
80G8212
Danfoss
80G8221
Humidity
Time
Humidity diff.
SP
Humidifier
100%
AK-CC55 Multi Coil
When the night blind rolls down, the fan will be stopped for the set time. The night blind can thereby roll down to the correct position.

Humidity control

In application 4 when setup for room control it is possible to dene if humidity control should be done via a humidier or a dehumidier.
When humidity control is enabled, the second display will read out the actual humidity.
The controller measures the humidity via a 0 – 10 V signal from a humidity sensor and by means of a DO relay it can activate a humidier or a de-humidier.
High and low humidity alarm limits can be set to generate a humidity alarm.
Humidity control is disabled when main switch is OFF, at manual control, at case shutdown, at forced closing mode, at door open, if cooling is stopped, at humidity sensor error and at case cleaning.
It is possible to dene whether humidity control is enabled during defrost or not.
Figure 14: Humidity control
A Max and Min temperature range can be dened wherein the humidity control is enabled. Upper and lower dierential is xed at 1K.
Figure 15: Humidier control
If the humidity gets below the SP, then humidication is started via a DO signal to a humidier.
If the humidity increases to SP + humidity dierential, then humidication is stopped.
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Danfoss
84B8269
A
r01
r01
t
º C
r62
B
C
ABC
Refrigeration
Neutral zone
Heat
Danfoss
80G8222
Humidity
Time
Humidity diff.
100%
SP
Dehumidifier
AK-CC55 Multi Coil
Figure 16: Dehumidier control
If the humidity rises above the SP, then dehumidication is started via a DO signal to a dehumidier.
If the humidity drops below the SP – Humidity dierential, then dehumidication is stopped.

Heating function (application 4 only)

The heating function is used to prevent the temperature from becoming too low, e.g. in a cold room, etc. The limit for when the heating function cuts o is set as an oset value below the current cut-out limit for the refrigeration thermostat. This ensures that refrigeration and heating do not occur simultaneously. The dierence for the heating thermostat has the same value as for the refrigeration thermostat. To prevent that the heating thermostat cuts in during short-term drops in air temperature, a time delay can be set for when to change from refrigeration to heating.
Figure 17: Heating function

Digital inputs

There are two digital inputs, DI1 and DI2, with dry contact function, and one digital input DI3 with high voltage signal.
They can be used for the following functions:
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Function
Input / Settings menu
Setting
DI1
DI2
DI3
o02
o37
o84
None+++0
DI Status+++1
Door function+++2
Door alarm+++3
Defrost start+++4
Main switch+++5
Night setback+++6
Thermostat band
+++
7
Alarm at closed++
8
Alarm at open++
9
Case cleaning+++10
Forced cooling+++11
Open blinds+++12
Coordinated defrost
+
13
Forced closing+++14
Shutdown+++15
Light control+++16
Leak detection+++20
Adaptive liquid control
+++
21
AK-CC55 Multi Coil
Table 6: Function table and DI settings
Example: If DI1 is to be used to start a defrost, o02 must be set to 4.

Forced closing

The AKV valves can be closed with an external signal ("Forced closing").
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 and cannot start again (however not at low pressure – LP).
Via a setting (see o90 Fan at forced closing) it is possible to dene whether the fan should be ON or OFF during forced closing and whether an ongoing defrost is suppressed (i.e. put in standby position for a period of up 10 minutes before it is cancelled) - this feature can be used in CO2 systems to eliminate excessive heating while compressors cannot run.
The signal can be received from the DI-input or via the data communication.

Door contact

The door contact function can via the digital inputs be dened for two dierent applications:
Alarm monitoring:
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.
Alarm monitoring and stop of refrigeration:
When the door is opened, the refrigeration is stopped, i.e. the injection, the compressor and the fan are stopped and light switches on. 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 if 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 triggered.

Display

The controller has one or two plugs for an external display. One of the following display types can be connected to a plug:
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Danfoss
84B8238
Master control function
Description
MC Ther. toggle
Master control signal used for switching case load ON/OFF depending on the load condition
MC Load request
Master control signal used to control the load balance between multiple case controllers on the same suction line
MC Max. Te
oset
Requested
oset to actual evaporating temperature in order to keep the air temperature at the actual setpoint
MC Liquid control
Master control signal allowing switch to adaptive liquid control
MC Night setback
Master control signal for changing between day and night time operation
MC Case shutdown
Master control signal used to shut down a case for a time period. During shutdown there will be no alarm monitoring
MC Forced closing
Master control signal that will close the injection valve
MC Forced cooling
Master control signal that will provide forced cooling
MC Defrost start
Master control signal for starting a defrost. At adaptive defrost the defrost might be skipped if the defrost is not needed
MC Defrost state
Read out the actual state of the defrost
MC Hold after defrost
Master control signal used for co-ordinated defrost control to hold cabinets from returning to normal refrigeration after a defrost until all cabinets have terminated defrost
MC Stop defrost
Master control signal used to prevent a defrost start in a controller.
MC Light signal
Master control signal for control of light via a data communication signal from the system manager
MC Actual dewpoint
Master control signal sending the actual measured dewpoint from the system manager to the controller over the network.
MC Bluetooth lock
Master control signal that will lock down all Bluetooth data communication
AK-CC55 Multi Coil
• AK-UI55 Info (temperature display)
• AK-UI55 Set (temperature display and operation)
• AK-UI55 Bluetooth (temperature display and app interface)
The connection between the display and the controller must be made using an AK-UI55 cable. The distance between the controller and the display must not exceed 100 m. If there are two external displays, it will be the sum of the two distances that cannot exceed 100 m.
Figure 18: Controller with two displays

Override

The controller contains a number of override functions which can be used together with Master Control functions in the Danfoss gateway/system manager:
Table 7: Override functionality
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Danfoss
84B8276
S₅
S₂
S₅
S₄
S₄
Danfoss
84B8284
S
4
S
5
(1)
*
Danfoss
84B3255
115 – 230 V AC
AKV DO3 DO7DO5 DO6
DI3
115 – 230 V AC
1 2 3 7 8 9 10 11 12 13 14 23 2421 22 30 3115 16 17 18 19 20
L N
40 5V
s
AI1
AI2 AI5 AI6
(1)
AI3 AI4 DI1/
AI7
(1)
DI2 AO1
PWM
41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84
B-A
+
MODBUS
85
DO2 DO4
See Table 9
Max. 0.5 A - No overload protection!
Application 1-3
Control of one, two and three evaporators.
Application 4
Control of high temperature cold rooms with two evaporators.
Application 5
Control of low temperature cold rooms with two evaporators.
AK-CC55 Multi Coil

Applications

The chapter outlines application examples:
• 1-3: Control of one, two and three evaporators
• 4: Control of high temperature cold rooms with two evaporators
• 5: Control of low temperature cold rooms with two evaporators
An application setting will congure inputs and outputs so that the controller’s operation interface is reecting the selected application.
Figure 19: Standard display case, upright or normal, with one evaporator
Figure 20: Cold room conguration with door, light and heat control function

AK-CC55 connections and application options

Upper and lower connection labels are laid out as shown in gure:
Figure 21: Electrical connections AK-CC55 Multi Coil
AK-CC55 Multi Coil is optimised for control of one to three expansion valve + dierent combinations of light, rail heat and alarm relays. It has 7 Digital Outputs (DO), known as DO1 – DO7, one Analogue Output (AO), known as AO1, 6 Analogue Inputs (AI), known as AI1 – AI6, an input that can be used as either DI1 (Digital Input) or AI7 (Sensor Input), and 2 Digital Inputs, known as DI2 - DI3.
Table 8: The controller covers the following ve applications:
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No.
Application description
DO1
DO2
DO3
DO4
DO5
DO6
DO7
AO1
1
1 evaporator
A
A
2
2 evaporators
ABA
B
3
3 evaporators
ABC
4
Cold room
A
B
5
Cold room
ABA
B
Pe
Evaporating pressure
S2 A, B or C
Gas outlet of evaporator A, B or C
S4 A, B or C
Discharge air temperature A, B or C
S5 A or B
Evaporator temperature A or B
RH%
Relative humidity sensor
No.
Application description
AI1
AI2
AI3
AI4
AI5
AI6
AI7/DI1
DI2
DI3
1
1 evaporator
Pe
S2A
S4A
S5A
2
2 evaporators
Pe
S2A
S4A
S5A
S2B
S4B
S5B
3
3 evaporators
Pe
S2A
S4A
S5B
S4B
S2C
S4C
4
Cold roomPeS2A
S4A
S5B
S4B
RH%
5
Cold roomPeS2A
S4A
S5B
S2B
S4B
S5B
115 – 230 V AC
AKV A Alarm Railheat Defrost Light Fan
DI3
115 – 230 V AC
1 2 3 7 8 9 10 11 12 13 14 23 2421 22 30 3115 16 17 18 19 20
L N
40
5V
s
Pe
0 – 10 V/
PWM
S2A S4A S5A DI1 DI2 AO1
PWM
1
41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84
B-A
+
MODBUS
85
P
1 3 2
Danfoss
84B3268
AK-CC55 Multi Coil
Table 9: AK-CC55 Multi Coil Application with Digital and Analogue input specication
Table 10: Sensor description
Table 11: AK-CC55 Multi Coil Application with Digital and Analogue input specication
= Optional use

Application set-ups and IO connections

Figure 22: Connections for application 1
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115 – 230 V AC
AKV A Railheat AKV B Defrost A Defrost BLight Fan
DI3
115 – 230 V AC
1 2 3 7 8 9 10 11 12 13 14 23 2421 22 30 3115 16 17 18 19 20
L N
A B A B
40
5V
s
Pe
0 – 10 V/
PWM
S2A S2B S4BS4A S5A S5B DI2 AO1
PWM
2
41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84
B-A
+
MODBUS
85
P
1 3 2
Danfoss
84B3269
115 – 230 V AC
AKV A AKV B AKV CLight Fan
DI3
115 – 230 V AC
1 2 3 7 8 9 10 11 12 13 14 23 2421 22 30 3115 16 17 18 19 20
L N
A B C
40
5V
s
Pe
0 – 10 V/
PWM
S2A S4B S2CS4A S2B S4C DI2 AO1
PWM
3
41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84
B-A
+
MODBUS
85
P
1 3 2
Alarm Railheat
Danfoss
84B3270
115 – 230 V AC
AKV A AKV B HeatLight Fan
DI3
115 – 230 V AC
1 2 3 7 8 9 10 11 12 13 14 23 2421 22 30 3115 16 17 18 19 20
L N
A B
40
5V
s
Pe
0 – 10 V/
PWM
S2A S4B RH%S4A S2B DI1 DI2 AO1
PWM
4
41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84
B-A
+
MODBUS
85
P
1 3 2
Alarm Humidity
RH
U
0-10
Danfoss
84B3271
AK-CC55 Multi Coil
Figure 23: Connections for application 2
Figure 24: Connections for application 3
Figure 25: Connections for application 4
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115 – 230 V AC
AKV A AKV B Defrost BLight Fan
DI3
115 – 230 V AC
1 2 3 7 8 9 10 11 12 13 14 23 2421 22 30 3115 16 17 18 19 20
L N
A B
40
5V
s
Pe
0 – 10 V/
PWM
S2A S2B S4BS4A S5A S5B DI2 AO1
PWM
5
41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84
B-A
+
MODBUS
85
P
1 3 2
Alarm Defrost A
A
B
Danfoss
84B3272
Danfoss
84B3232.11A
AK-CC55 Multi Coil
Figure 26: Connections for application 5
Product identication
The controller is provided with labels from the factory, indicating a generic application. When selecting the required application, specic labels are provided so that you can mount the relevant one.
The application number is indicated on the left-hand side of the labels. Use the label tting the selected application.
Some of the labels can be applicable to multiple application options.
Figure 27: Product identication

AK-CC55 Multi Coil connections

Data communication
Figure 28: Data communication
IMPORTANT:
It is important that the installation of the data communication cable is performed correctly with sucient distance to high voltage cables.
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230 V AC (115 AC)
8 9
AKV
Danfoss
84B8285
230 V or 115 V AC coil Max. 0.5 A
230 V AC (115 AC)
13 14
DO3
Danfoss
84B8286
230 V or 115 V AC coil Max. 0.5 A Not overload protected
230 V AC (115 AC)
23 24
Danfoss
84B8287
DO7
230 V or 115 V AC coil Max. 0.5 A Not overload protected
A
AKS 32R
B
out
C
ABC
Black
Brown
Blue
AO1/ PWM
60 61 70 71
SSR
Danfoss
80G8234
AK-CC55 Multi Coil
AKV info
Figure 29: AKV A info
Figure 30: AKV B info
External solid state relay for rail heat
Figure 32: External solid state relay for rail heat
Figure 31: AKV C info
0 / 10 V Pulse Width Modulated (PWM) Max. 15 mA.
AKS 32R info
Figure 33: AKS 32R info
NOTE:
A ratiometric pressure transmitter with a 5 V, 10 – 90% voltage output signal must be used.
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Danfoss
84B8238
AK-CC55 Multi Coil
The signal from one pressure transmitter can be received by up to 10 controllers. There must not be a signicant pressure drop from the pressure transmitter's position in the suction line to the individual evaporators.
Coordinated defrost via cable connections
Figure 34: Coordinated defrost via cable connections
Max. 10 The following controllers can be connected in this way: EKC 204A, AK-CC 210, AK-CC 250, AK-CC 450, AK-CC 550 and AK-CC55.
Refrigeration is resumed at the same time when all controllers have terminated defrost.
External display AK-UI55
Figure 35: External display AK-UI55
(Total length: max. 100 m)
Connections
AI1 Pressure transmitter
AKS 32R Connect to terminal 40, 41 and 42. (Use cable 060G1034: Black=40, Brown=41, Blue=42)
The signal from one pressure transmitter can be received by up to 10 controllers. But only if there are no signicant pressure drops between the evaporators to be controlled. See Figure 33: AKS 32R info.
AI2 - AI7 Primarily for temperature inputs
S2 Pt 1000 ohm sensor AKS11, placed at the evaporator outlet
S4, S5 Pt 1000 AKS11, PTC 1000 EKS111, NTC5K EKS211 or NTC10K EKS221 sensor. All have to be of the same type.
S4, discharge air sensor, placed in the cold air of the evaporator
S5, defrost sensor, placed in the evaporator.
RH%, 0 – 10 V signal input from Humidity sensor
(If the DI1 input is used for a temperature measurement, it will appear as AI7.)
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AK-CC55 Multi Coil
DI1 Digital input signal (dry contact)
The dened function is active when the input is short-circuited or opened, depending on the function dened in o02.
DI2 Digital input signal (dry contact)
The dened function is active when the input is short-circuited or opened, depending on the function dened in o37.
AO1 Analogue output signal
Analogue 0 – 10 V (currently not used)
Pulse width modulated signal Can be used for fast pulse control of rail heat via an external power solid state relay.
MODBUS
For data communication.
• Terminal 83 = B-
• Terminal 84 = A+
• Terminal 85 = screen
Supply voltage
• 230 V AC or 115 V AC
DO1
AKV valve section A Connection of expansion valve type AKV, AKVA, AKVH or AKVP. The coil must be a 230 V or 115 V AC coil.
DO2
Alarm There is a connection between terminal 10 and 12 in alarm situations and when the controller is without power. DO2 has reinforced insulation that can be used with 24 V.
Rail heat There is connection between terminal 10 and 11 when the function is on.
DO3 (Solid State Relay)
Rail heat, AKV valve section B There is connection between terminal 13 and 14 when the function must be active.
The coil must be a 230 V or 115 V AC coil. Max. 0.5 A.
DO4
Defrost section A, Rail heat, Humidity There is connection between terminal 15 and 16 when the function is on.
DO5
Light There is connection between terminal 18 and 20 when the function must be active.
DO6
Fan There is connection between terminal 21 and 22 when the fan is on.
DO7 (Solid State Relay)
Defrost section B, AKV valve section C, Heat function
There is connection between terminal 23 and 24 when the function is on.
The coil must be a 230 V or 115 V AC coil. Max. 0.5 A.
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AK-CC55 Multi Coil
DI3 Digital input signal
The signal must have a voltage of 0 / 230 V AC (115 V AC) The function is dened in o84.
Display (RJ12 plug)
If external readings/operation of the controller is required, a display can be connected. For one display the max. cable length is 100 m. For two displays the sum of the two cable lengths must not exceed 100 m.
Electric noise
Cables for sensors, low voltage DI inputs and data communication must be kept separate from other high voltage cables:
• Use separate cable trays
• Keep a distance between cables of at least 10 cm
• Long cables at the low voltage DI input should be avoided
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 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 t the necessary safety devices.
Special reference is made to the necessity of signals to the controller when the compressor is stopped and to the need of liquid receivers before the compressors.
Your local Danfoss agent will be pleased to assist with further advice, etc.
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AK-CC55 Multi Coil

Operation

The controller can be operated in dierent ways depending on the user interface. The following options are available:
• Via data commmunication
• Via AK-UI55 Setting Display
• Via AK-UI55 Bluetooth display

Operation via data communication

Via system manager's display
All AK-CC55 controllers can be operated from a central location, e.g. AK-SM 800. Data communication is to take place via MODBUS or Lon.
Via system manager and service tool
Operation can also be performed from a central location with PC software "Service Tool" connected to a system manager AK-SM 720 via MODBUS or Lon.
Programming via KoolProg
Programming by use of PC software type KoolProg® via interface MMIMYK connected to RJ12 display connector.

Direct operation

Operation via AK-UI55 setting display The display can be placed at a distance of up to 100 metres from the controller.
Smart phone and app via AK-UI55 Bluetooth display
The "AK-CC55 connect" app is used for smart phone operation. AK-CC55 connect can be downloaded freely to a compatible iOS/Android smartphone device. Menu operation is established by activating Bluetooth communication to the app.

Operation via AK-UI55 Set

Display AK-UI55 Set
The values will be shown with three digits, and with a setting you can determine whether the temperature is to be shown in °C or in °F.
The keyboard can be locked and unlocked by pressing arrow up and down at the same time if the parameter P89 has enabled this feature.
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Lights in event of alarm — press on alarm button — alarm relay is reset — alarm code displayed — e.g. A1”
Lights up in event of: Energy optimization Cooling Defrosting Fan operation
Up arrow / Down arrow / Arrow to left: Navigation in the menu and setting of values.
Long press (3 seconds) will start a defrost, “-d-” is shown in the display. Ongoing defrosting can be stopped by a long press.
Long press (3 seconds) gives access to the information menu “InF
SET:
Long press (3 seconds) gives access to the “SEt menu. If the operation is locked with a password, “PS is shown. Enter the code.
Shows the setting for a chosen parameter / saves a changed setting. Short press gives access to entering of the thermostats cut-out limit.
Danfoss
84B8265
Display readout
Denomination
-d-
Defrost is in progress
Err
The temperature cannot be displayed due to a sensor error
Er1
The display cannot load data from the controller. Disconnect and then reconnect the display
Er2
Lost display communication
ALA
The alarm button is activated. The rst alarm code is then shown
- - -
At top position of the menu or when max. value has been reached, the three dashes are shown in the top of the display
- - -
At bottom position of menu or when min. value has been reached, the three dashes are shown in the bottom of the display
Loc
The menu operation is locked. Unlock by pressing (for 3 seconds) on the ‘up arrow’ and ‘down arrow’ simultaneously
UnL
The menu operation is unlocked
- - -
The parameter has reached min. or max. limit
PS
A password is required for access to the menu
Fan
Appliance cleaning has been initiated. The fans are running
OFF
Appliance cleaning is activated and the appliance can now be cleaned
OFF
The main switch is set to O
SEr
The main switch is set to service / manual operation
CO2
Flashes: Will display in event of a refrigerant leakage alarm, but only if the refrigerant is set up for CO
2
AK-CC55 Multi Coil
Figure 36: Operating via AK-UI55 Set
Table 12: Messages provided by the display
Factory setting
If you need to return to the factory-set values, do the following:
• Cut o the supply voltage to the controller
• Keep up "" and down "" arrow buttons depressed at the same time as you reconnect the supply voltage
• When FAc is shown in the display, select "yes"
NOTE:
The OEM factory setting will either be the Danfoss factory settings or a user dened factory setting if one has been made.
The user can save his setting as OEM factory setting via parameter o67.
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SET
Set
(PS)
<
cFg SET
Þ
r12 Main switch
<
o61 Application
r-- o03 MODBUS address
A-- r89 Food type
r00 Cut-out temperature
o30 Refrigerant type
o20 Min. transmitter range
o21 Max. transmitter range
d01 Defrost method
d03 Defrost interval
d10 Defrost sensor
d04 Max. defrost time
d02 Defrost stop temperature
<
(Return)
Menu groups
See also the following pages.
d--
n--
F--
t--
h--
o--
p--
q--
u--
<
(Return)
SET button, 3 s: Configuration settings
PS: Password (if any)
Danfoss
84B3294
Danfoss
84B8282
Info button, 3 s: Information for service use
<
Inf
StA SET See control state message
App SET See selected application
in SET
di1/ AI7
**
Read input status
out SET
do1 Akv
Read output status
di2 **
buS SET MODBUS quality do2
*
di3 **
SoF SET See SW version do3
*
AI1 PE
< do4
*
AI2 S2
(Return)
do5
*
AI3 S4
do6
*
do7
*
AI4 S5
AI5
Ao1
*
AI6
**
**
(Return)
<<
(Return)
Output status
When you want info on a relay output, the dot will show whether the relay is activated (energized) for, e.g.:
do4 = not activated
do.4 = activated
*
**
StA
The output's function (determined at
conguration). The DOs and AOs can also be
forced controlled from this menu, when r12 Main
switch has been set in position "service". Forced
control of a function can also be performed in
codes q11 to q27.
The input's function (determined at conguration).
See control state message in Table 46
AK-CC55 Multi Coil
Parameter groups when operating via display
Figure 37: SET button parameter list
Figure 38: Info button parameter list
Get a good start
With the following procedure you can start regulation very quickly:
1.
2.
3.
4.
5.
6.
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Open parameter r12 and stop the regulation (in a new and not previously set unit, r12 will already be set to 0 which means stopped regulation) Select application based on the wiring diagrams Open parameter o61 and set the application number For network. Set the address in o03 Then select a set of presets from the "Food type" help table Open parameter r89 and set the number for the array of presettings. The few selected settings will now be transferred to the menu
Setting of presettings (r89). After setting 1-5, setting is returned to 0.
12345
Food type
Vegetables
Milk
Meat/sh
Frozen food
Ice cream
Temperature (r00)
8 °C
0 °C
-2 °C
-20 °C
-24 °C
Max. temp. setting (r02)
10 °C
4 °C
2 °C
-16 °C
-20 °C
Min. temp. setting (r03)
4 °C
-4 °C
-6 °C
-24 °C
-28 °C
Upper alarm limit (A13)
14 °C
8 °C
8 °C
-15 °C
-15 °C
Lower alarm limit (A14)
0 °C
-5 °C
-5 °C
-30 °C
-30 °C
Upper alarm limit for S6 (A22)
14 °C
8 °C
8 °C
-15 °C
-15 °C
Lower alarm limit for S6 (A23)
0 °C
-5 °C
-5 °C
-30 °C
-30 °C
AK-CC55 Multi Coil
7.
Set the desired cut-out temperature r00
8.
Select refrigerant via parameter o30
9.
Set the pressure transmitter min. and max. range via parameter o20 and o21
10.
Set the desired defrost method in d01
11.
Set the interval time between defrost starts in d03
12.
Set the desired defrost sensor in d10
13.
Set the maximum defrost time in d04
14.
Set the defrost stop temperature in d02
15.
Open parameter r12 and start the regulation
16.
Go through the parameter list and change the factory values where needed
17.
Get the controller up and running on network:
MODBUS: Activate scan function in system unitIf another data communication card is used in the controller:
Lon RS485: Activate the function o04Ethernet: Use the MAC address
Table 13: Food type settings
Can only be set when r12=0.
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 31
R-W
RW*
If the operation is protected by one or more passwords, reading and setting the parameter will be limited to:
R or W
This setting can be seen with password no. _ or higher (3 is the highest level).
This setting can be performed with password no. _ or higher (3 is the highest level).
The asterisk indicates in which application from 1-5 the parameter is applicable.
Function
Values
R-W
Code12345Min.value
Max.value
Fact.value
Cut-out 1
0-0
r00*****r03
r02
2.0 °C
Dierential
1-2
r01*****0.1 °C
20.0 °C
2.0 °C
Max cut-out limit
0-2
r02*****r03
50.0 °C
50.0 °C
Min cut-out limit
0-2
r03*****-50.0 °C
r02
-50.0 °C
Temperature unit
0=Celsius, 1=Fahrenheit
1-2
r05*****010
S4 Air OFF evap. A - Adjustment
1-2
r09*****-10.0 °C
10.0 °C
0.0 °C
Main switch
-1=Manual, 0=Stop, 1=Start
0-2
r12*****-110
Night oset
1-2
r13*****-50.0 °C
50.0 °C
0.0 °C
Thermostat mode
1=ON/OFF, 2=Modulating, 3=ON/OFF Common
1-2
r14*****131
Melt interval
1-2
r16*****0 hours
10 hours
1 hour
Melt period
1-2
r17*****0 min
30 min
5 min
Cut-out 2
0-2
r21*****-50.0 °C
50.0 °C
2.0 °C
Air heater neutral zone
1-2
r62*0.0 °C
50.0 °C
5.0 °C
Air heater start delay
1-2
r63*0 min
240 min
240 min
Food type
0=None, 1=Vegetables, 2=Dairy, 3=Meat and sh, 4=Frozen food, 5=Ice cream
1-2
(1)
r89*****050
Thermostat sensor
1=Ther. air A, 2=Average all, 3=Maximum all
1-2
r99****13
1
Function
Values
R-W
Code12345Min.value
Max.value
Fact.value
Alarm delay A
1-2
A03*****0 min
240 min
30 min
Door open alarm delay
1-2
A04*****0 min
240 min
60 min
Alarm delay pulldown A
1-2
A12*****0 min
240 min
90 min
High alarm limit 1
1-2
A13*****-50.0 °C
50.0 °C
8.0 °C
Low alarm limit 1
1-2
A14*****-50.0 °C
50.0 °C
-30.0 °C
High alarm limit 2
1-2
A20*****-50.0 °C
50.0 °C
8.0 °C
Low alarm limit 2
1-2
A21*****-50.0 °C
50.0 °C
-30.0 °C
Alarm delay DI 1
1-2
A27**
0 min
240 min
30 min
Alarm delay DI 2
1-2
A28*****0 min
240 min
30 min
Function
Values
R-W
Code12345Min.value
Max.value
Fact.value
Defrost method
0=None, 1=Electrical,
4=Air/
Ocycle
1-3
d01*****041
Defrost stop limit A
1-2
d02*****0.0 °C
50.0 °C
6.0 °C
Defrost start interval
1-2
d03*****0 hours
240 hours
8 hours
Max. defrost time
1-2
d04*****0 min
360 min
45 min
AK-CC55 Multi Coil

AK-UI55 display menu (SW ver. 1.8x)

Thermostat

Table 14: Thermostat
(1)
(1)
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Alarm settings

Table 15: Alarm settings

Defrost

Table 16: Defrost
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Function
Values
R-W
Code12345Min.value
Max.value
Fact.value
Time staggering power-up
1-2
d05*****0 min
240 min
0 min
Drip o time
1-2
d06*****0 min
60 min
0 min
Fan start delay
1-2
d07*****0 min
60 min
0 min
Fan start temperature
1-2
d08***-50.0 °C
10.0 °C
-50.0 °C
Fan control during defrost
0=OFF, 1=ON, 2=OFF at drip, 3=OFF at high temp
1-2
d09*****031
Defrost stop method
0=Time, 1=S5 sensor, 2=S4 sen­sor
1-2
d10*****020
Pump down delay
1-2
d16*****0 min
60 min
0 min
Max. thermostat run time
1-2
d18*****0 hours
240 hours
0hours
Rail heat during defrost
0=OFF, 1=ON, 2=Normal control
1-2
d27*****021
Display delay after defrost
1-2
d40*****5 min
240 min
30 min
Fan stop temperature
1-2
d41*****-20.0 °C
20.0 °C
0.0 °C
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
Max. superheat limit
1-2
n09*****n10
20.0 °C
12.0 °C
Min. superheat limit
1-2
n10*****2.0 °C
n09
3.0 °C
MOP temperature
1-2
n11*****-50.0 °C
15.0 °C
15.0 °C
AKV Period time
1-2
(1)
n13*****3 s
6 s
6 s
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
Fan stop high S5 temp.
1-2
F04***-50.0 °C
50.0 °C
50.0 °C
Fan pulsing mode
0=No pulsing, 1=Pulsing cut­out, 2=Pulsing cut-out night
1-2
F05*****020
Fan period time
1-2
F06*****1 min
30 min
5 min
Fan ON cycle
1-2
F07*****0 %
100 %
100%
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value

Defrost schedule

0=No, 1=Yes
1-2
t00*****010
Def. start 1 - Hours
1-2
t01*****0 hours
23 hours
0 hour
Def. start 1 - min
1-2
t11*****0 min
59 min
0 min
Def. start 2 - Hours
1-2
t02*****0 hours
23 hours
0 hour
Def. start 2 - min
1-2
t12*****0 min
59 min
0 min
Def. start 3 - Hours
1-2
t03*****0 hours
23 hours
0 hour
Def. start 3 - min
1-2
t13*****0 min
59 min
0 min
Def. start 4 - Hours
1-2
t04*****0 hours
23 hours
0 hour
Def. start 4 - min
1-2
t14*****0 min
59 min
0 min
Def. start 5 - Hours
1-2
t05*****0 hours
23 hours
0 hour
Def. start 5 - min
1-2
t15*****0 min
59 min
0 min
Def. start 6 - Hours
1-2
t06*****0 hours
23 hours
0 hour
Def. start 6 - min
1-2
t16*****0 min
59 min
0 min
Time hours
0-1
t07*****0 hours
23 hours
0 hour
Time min
0-1
t08*****0 min
59 min
0 min
Time date
0-1
t45*****1311
Time month
0-1
t46*****1121
Time year
0-1
t47*****0
100
0
Monday - Follow schedule
0=No, 1=Yes
1-2
t51*****011
Tuesday - Follow schedule
0=No, 1=Yes
1-2
t52*****011
AK-CC55 Multi Coil

Injection control

Table 17: Injection control
(1)
(1)
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Fan control

Table 18: Fan control
Defrost schedule
Table 19: Defrost schedule
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 33
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
Wednesday - Follow schedule
0=No, 1=Yes
1-2
t53*****011
Thursday - Follow schedule
0=No, 1=Yes
1-2
t54*****011
Friday - Follow schedule
0=No, 1=Yes
1-2
t55*****011
Saturday - Follow schedule
0=No, 1=Yes
1-2
t56*****011
Sunday - Follow schedule
0=No, 1=Yes
1-2
t57*****011
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
Humidity cut-in
0-2
h23*0 %
100 %
70%
Humidity dierential
1-2
h24*1 %
30 %
5%
Humidity high alarm limit
1-2
h25*0 %
100 %
100%
Humidity low alarm limit
1-2
h26*0 %
100 %
0%
Humidity alarm delay
1-2
h27*0 min
240 min
60 min
Humidity ctrl. at defrost
0=No, 1=Yes
1-2
h28*010
Humidity sensor - Min signal
1-2
(1)
h29*0 %
h30
0%
Humidity sensor - Max signal
1-2
(1)
h30*h29
100 %
100%

Humidity control

0=None, 1=Humidier, 2=Dehu-
midier
1-2
(1)
h31*020
Humidity max. temp.
1-2
h32*h33
70.0 °C
70.0 °C
Humidity min. temp.
1-2
h33*-5.0 °C
h32
2.0 °C
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
Delay of outputs at pow­er-up
1-2
o01*****0 s
600 s
5s
DI1
Conguration
0=None, 1=DI status, 2=Door function, 3=Door alarm, 4=Defrost start, 5=Main switch, 6=Night setback, 7=Thermostat band, 8=Alarm at closed, 9=Alarm at open, 10=Case cleaning, 11=Forced cooling, 12=Open blinds, 13=Coordina­ted defrost, 14=Forced closing, 15=Shutdown, 16=Light control, 20=Leak detection, 21=Adaptive liquid control
1-2
(1)
o02**021
0
Network address
1-3
(1)
o03*****0
240
0
Service pin
0=OFF, 1=ON
1-2
o04*****010
Access code 3
3-3
o05*****0
999
0
Temperature sensor type
0=Pt 1000, 1=PTC 1000, 2=NTC 5k, 3=NTC 10k
1-3
(1)
o06*****030
Max. hold time
1-2
o16*****0 min
360 min
20 min
Pe Min range
1-3
(1)
o20*****-1.0 Bar
5.0 Bar
-1.0Bar
Pe Max range
1-3
(1)
o21*****6.0 Bar
200.0 Bar
12.0Bar
Refrigerant
0=Not seleted, 6=R13, 7=R13b1, 2=R22, 8=R23, 14=R32, 11=R114, 3=R134a, 12=R142b, 24=R170, 15=R227, 25=R290, 16=R401A, 18=R402A, 19=R404A, 21=R407A, 22=R407B, 20=R407C, 37=R407F, 49=R407H, 23=R410A, 32=R413A, 30=R417A, 31=R422A, 33=R422D, 34=R427A, 35=R438A, 40=R448A, 41=R449A, 48=R449B, 43=R450A, 44=R452B, 45=R454B, 9=R500, 4=R502, 10=R503, 17=R507, 36=R513A, 26=R600, 27=R600a, 5=R717, 28=R744, 46=R1233zdE, 38=R1234ze, 39=R1234yf, 47=R1234zeZ, 29=R1270, 42=R452A, 1=User dened display, 13=User dened
1-3
(1)
o30*****0490
AK-CC55 Multi Coil
Humidity control
Table 20: Humidity control
(1)
(1)
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Miscellaneous

Table 21: Miscellaneous
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 34
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
DI2 Conguration
0=None, 1=DI status, 2=Door function, 3=Door alarm, 4=Defrost start, 5=Main switch, 6=Night setback, 7=Thermostat band, 8=Alarm at closed, 9=Alarm at open, 10=Case cleaning, 11=Forced cooling, 12=Open blinds, 13=Coordina­ted defrost, 14=Forced closing, 15=Shutdown, 16=Light control, 20=Leak detection, 21=Adaptive liquid control
1-2
(1)
o37*****0210
Light control mode
1=Day and night, 2=Network, 3=Door switch, 4=Network (Fallback), 5=Digital input
1-2
o38*****151
MC Light signal
0=OFF, 1=ON
1-2
o39*****010
Rail heat ON cycle day
1-2
o41*****0 %
100 %
100%
Rail heat ON cycle night
1-2
o42*****0 %
100 %
100%
Rail heat period time
1-2
o43***6 min
60 min
6min
Case cleaning mode
0=OFF, 1=Fans run, 2=Cleaning
0-1
o46*****020
Application mode
1=1. One evaporator MT/LT, 2=2. Two evaporators MT/LT, 3=3. Three evapora­tors MT, 4=4. Coldroom 2 MT/HT, 5=5. Coldroom 2 MT/LT
1-3
(1)
o61*****151
Access code 2
2-2
o64*****0
999
0
Make new factory
0=OFF, 1=ON
3-3
(1)
o67*****010
DI3 Conguration
0=None, 1=DI status, 2=Door function, 3=Door alarm, 4=Defrost start, 5=Main switch, 6=Night setback, 7=Thermostat band, 8=Alarm at closed, 9=Alarm at open, 10=Case cleaning, 11=Forced cooling, 12=Open blinds, 13=Coordina­ted defrost, 14=Forced closing, 15=Shutdown, 16=Light control, 20=Leak detection, 21=Adaptive liquid control
1-2
(1)
o84*****0210
Rail heat control mode
0=ON, 1=Day/Night timer, 2=Dewpoint ctrl.
1-2
o85*****020
Dewpoint min. limit
1-2
o86*****-10.0 °C
o87
8.0 °C
Dewpoint max. limit
1-2
o87*****o86
50.0 °C
17.0 °C
Rail heat min. ON cycle
1-2
o88*****0 %
100 %
30%
Door restart inj. delay
1-2
o89*****0 min
240 min
30 min
Fan at forced closing
0=OFF, 1=ON, 2=OFF and suppress de­frost, 3=ON and suppress defrost
1-2
o90*****031
Display readout
1=Ther. air A, 2=Average all, 3=Maxi­mum all, 4=S4A and S4B
1-2
o97*****141
Light at Main switch OFF
0=OFF, 1=Normal ctrl.
1-2
o98*****010
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
Alarm relay priority
0=Not used, 1=High Priority, 2=Medium priority, 3=All
1-2
P41****03
1
Blinds max. open time
1-2
P60*****0 min
60 min
5 min
Fan stop at blinds closing
1-2
P65*****0 s
300 s
0 s
Rail heat PWM - Period time
1-2
P82*****4 s
60 s
10 s
Refrigerant factor K1
1-3
(1)
P83*****-999
999
300
Refrigerant factor K2
1-3
(1)
P84*****-999
999
300
Refrigerant factor K3
1-3
(1)
P85*****-999
999
300
Max superheat liquid ctrl.
1-2
P86*****P87
20.0 °C
3.0 °C
Min superheat liquid ctrl
1-2
P87*****0.0 °C
P86
1.0 °C
Access code 1
1-1
P88*****0
999
0
Display lock
0=OFF, 1=ON
1-2
P89*****010
AK-CC55 Multi Coil
(1)
(1)
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Control

Table 22: Control
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 35
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
AO1 Conguration
0=None, 1=Rail heat PWM
1-3
(1)
q09*****010
EEV override A
1-2
(2)
q11*****0 %
100 %
0%
Fan - override
0=MAN OFF, 1=MAN ON
1-2
(2)
q13*****010
Defrost A - override
0=MAN OFF, 1=MAN ON
1-2
(2)
q14***010
Rail heat - override
0=MAN OFF, 1=MAN ON
1-2
(2)
q15***010
Alarm relay - override
0=MAN OFF, 1=MAN ON
1-2
(2)
q16****010Light - override
0=MAN OFF, 1=MAN ON
1-2
(2)
q17*****010
Defrost B - override
0=MAN OFF, 1=MAN ON
1-2
(2)
q22**010Air heater - override
0=MAN OFF, 1=MAN ON
1-2
(2)
q23*010
Humidier - override
0=MAN OFF, 1=MAN ON
1-2
(2)
q26*010
Rail heat PWM - override
1-2
(2)
q27*****0 %
100 %
0%
High temperature - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
0-2
q28*****031
Low temperature - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
1-2
q29*****031
Sensor errors - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
1-2
q30*****031
DI alarms - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
1-2
q31*****032
Defrost - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
1-2
q32*****033
Miscellaneous - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
1-2
q33*****032
Injection - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
1-2
q34*****032
Control stopped - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
1-2
q35*****033
Leak detection - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
1-2
q36*****032
Humidity ctrl. - Priority
0=Disabled, 3=Low, 2=Medium, 1=High
1-2
q37*032
Food temp. sensor
1=Ther. air A, 2=Average all, 3=Maximum all
1-2
(1)
q39*****131
EEV override B
1-2
(2)
q41****
0 %
100 %
0%
EEV override C
1-2
(2)
q42*0 %
100 %
0%
S4 Air OFF evap. B - Adjustment
1-2
q43****
-10.0 °C
10.0 °C
0.0 °C
S4 Air OFF evap. C - Adjustment
1-2
q44*-10.0 °C
10.0 °C
0.0 °C
Dehumidier -override
0=MAN OFF, 1=MAN ON
1-2
(2)
q46*010
AK-CC55 Multi Coil
(1)
(1)
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.
DO cong and manual
Table 23: DO cong and manual
(1)
(1)
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.
In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.
(2)
(2)
In order to change this parameter the parameter r12 Main switch must be set in position "SEr" allowing manual control of outputs.
In order to change this parameter the parameter r12 Main switch must be set in position "SEr" allowing manual control of outputs.
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 36
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
Control state A
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost pro­tection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heat­ing, 45=Shut down controller, 48=Adap­tive liquid control
0-X
u00*****0480
S5 Evaporator A
0-X
u09***-200.0 °C
200.0 °C
0.0 °C
DI1 Status
0=OFF, 1=ON
0-X
u10**010Defrost time A
0-X
u11*****0 min
900 min
0 min
Night condition
0=OFF, 1=ON
0-X
u13*****010
S4 Air OFF evap. A
0-X
u16*****-200.0 °C
200.0 °C
0.0 °C
Thermostat air temp. A
0-X
u17*****-200.0 °C
200.0 °C
0.0 °C
Thermostat run time A
0-X
u18*****0 min
999 min
0 min
S2 Gas outlet A
0-X
u20*****-200.0 °C
200.0 °C
0.0 °C
Superheat A
0-X
u21*****-200.0 °C
200.0 °C
0.0 °C
Superheat reference A
0-X
u22*****-200.0 °C
200.0 °C
0.0 °C
EEV opening A
0-X
u23*****0 %
100 %
0%
Pe Evap. pressure
0-X
u25*****-1.0 Bar
200.0 Bar
0.0Bar
Te Evap. temp.
0-X
u26*****-200.0 °C
200.0 °C
0.0 °C
DI2 Status
0=OFF, 1=ON
0-X
u37*****010
Display readout 1
0-X
u56*****-200.0 °C
200.0 °C
0.0 °C
Alarm air temp. A
0-X
u57*****-200.0 °C
200.0 °C
0.0 °C
Fan
0=OFF, 1=ON
0-X
u59*****010
Defrost A
0=OFF, 1=ON
0-X
u60***010
Rail heat
0=OFF, 1=ON
0-X
u61***010
Alarm relay
0=OFF, 1=ON
0-X
u62****010Light
0=OFF, 1=ON
0-X
u63*****010
S5 Evaporator B
0-X
u75**
-200.0 °C
200.0 °C
0.0 °C
Defrost B
0=OFF, 1=ON
0-X
u83**010Air heater
0=OFF, 1=ON
0-X
u84*010
Rail heat power
0-X
u85*****0 %
100 %
0%
Thermostat band
1=Band 1, 2=Band 2
0-X
u86*****121
DI3 Status
0=OFF, 1=ON
0-X
u87*****010
Thermostat cut-in temp.
0-X
u90*****-200.0 °C
200.0 °C
4.0 °C
Thermostat cut-out temp.
0-X
u91*****-200.0 °C
200.0 °C
2.0 °C
Alarm air temp. B
0-X
U34****
-200.0 °C
200.0 °C
0.0 °C
Display readout 2
0-X
U35****
-200.0 °C
200.0 °C
0.0 °C
Network status
0-X
U45*****0 %
100 %
0%
Humidity sensor
0-X
U57*0 %
100 %
0%
Humidier
0=OFF, 1=ON
0-X
U58*010
Rail heat PWM
0-X
U59*****0 %
100 %
0%
Food temperature A
0-X
U72*****-200.0 °C
200.0 °C
0.0 °C
Defrost sensor tempera­ture A
0-X
U73*****-200.0 °C
200.0 °C
0.0 °C
AK-CC55 Multi Coil

Service

Table 24: Service
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 37
Function
Values
R-W
Code12345Min. value
Max. value
Fact. value
Control state B
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost pro­tection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heat­ing, 45=Shut down controller, 48=Adap­tive liquid control
0-X
U74****048
0
Defrost time B
0-X
U75****
0 min
900 min
0 min
S4 Air OFF evap. B
0-X
U76****
-200.0 °C
200.0 °C
0.0 °C
Thermostat air temp. B
0-X
U77****
-200.0 °C
200.0 °C
0.0 °C
Thermostat run time B
0-X
U78****
0 min
999 min
0 min
S2 Gas outlet B
0-X
U79****
-200.0 °C
200.0 °C
0.0 °C
Superheat B
0-X
U80****
-200.0 °C
200.0 °C
0.0 °C
Superheat reference B
0-X
U81****
-200.0 °C
200.0 °C
0.0 °C
EEV opening B
0-X
U82****
0 %
100 %
0%
Control state C
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost pro­tection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heat­ing, 45=Shut down controller, 48=Adap­tive liquid control
0-X
U83*0480
Defrost time C
0-X
U84*0 min
900 min
0 min
S4 Air OFF evap. C
0-X
U85*-200.0 °C
200.0 °C
0.0 °C
Thermostat air temp. C
0-X
U86*-200.0 °C
200.0 °C
0.0 °C
Thermostat run time C
0-X
U87*0 min
999 min
0 min
S2 Gas outlet C
0-X
U88*-200.0 °C
200.0 °C
0.0 °C
Superheat C
0-X
U89*-200.0 °C
200.0 °C
0.0 °C
Superheat reference C
0-X
U90*-200.0 °C
200.0 °C
0.0 °C
EEV opening C
0-X
U91*0 %
100 %
0%
Alarm air temp. C
0-X
U92*-200.0 °C
200.0 °C
0.0 °C
Defrost sensor tempera­ture B
0-X
U93****
-200.0 °C
200.0 °C
0.0 °C
Defrost sensor tempera­ture C
0-X
U94*-200.0 °C
200.0 °C
0.0 °C
Dehumidier
0=OFF, 1=ON
0-X
U96*010
AK-CC55 Multi Coil
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 38
AK-CC55 Multi Coil

Operation via AK-UI55 Bluetooth

Access to parameters via Bluetooth and app
1.
App can be downloaded from App Store and Google Play.
Name = AK-CC55 ConnectStart the app.
2.
Click on the display’s Bluetooth button for 3 seconds.
The Bluetooth light will then ash while display is showing the controller’s address.
3.
Connect to the controller from the app.
Figure 39: AK-UI55 Bluetooth
Display info:
• Loc
• The operation is locked and cannot be operated via Bluetooth.
• Unlock from the system manager.
Figure 40: Connect to controller Figure 41: Controller dashboard Figure 42: Set-up menu
The functions are described on Page 40Page 56.
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 39
Function
Description
Values
Code
Short name
Main switch
Start / stop of refrigeration. With this setting refrigeration can be started, stopped or a manual override of the outputs can be allowed. (For manual control the value is set at -1). Then the outputs can be force controlled. Start / stop of refrig­eration can also be accomplished with the external switch function connected to a DI input.Stopped con­trol will give a ”Main switch OFF" alarm.
-1=Manual, 0=Stop, 1=Start
r12
r12 Main switch
Delay of outputs at power-up
Delay of output signal after start-up. After start-up or a power failure the controller’s func­tions can be delayed so that overloading of the elec­tricity supply network is avoided. Here you can set the time delay.
o01
o01 DelayOfOutp.
Function
Description
Values
Code
Short name
Main switch
Start / stop of refrigeration. With this setting refrigeration can be started, stopped or a manual override of the outputs can be allowed. (For manual control the value is set at -1). Then the outputs can be force controlled. Start / stop of refrig­eration can also be accomplished with the external switch function connected to a DI input. Stopped control will give a ”Main switch OFF" alarm.
-1=Manual, 0=Stop, 1=Start
r12
r12 Main switch
Application mode
Selection of application. The controller covers several applications for control of a refrigerated case. Here you set which of the possi­ble applications is required.This menu can only be set when regulation is stopped, i.e. “r12 Main Switch” is set to 0.
1=1. One evaporator MT/LT, 2=2. Two evaporators MT/LT, 3=3. Three evaporators MT, 4=4. Coldroom 2 MT/HT, 5=5. Coldroom 2 MT/LT
o61
o61 Appl. mode
AO1 Conguration
Select the function of the analogue output
0=None, 1=Rail heat PWM
q09
q09 AO1 Cong.
DI1 Conguration
Select the function of the digital input
0=None, 1=DI status, 2=Door function, 3=Door alarm, 4=Defrost start, 5=Main switch, 6=Night setback, 7=Thermostat band, 8=Alarm at closed, 9=Alarm at open, 10=Case cleaning, 11=Forced cooling, 12=Open blinds, 13=Coordinated defrost, 14=Forced closing, 15=Shutdown, 16=Light control, 20=Leak de­tection, 21=Adaptive liquid control
o02
o02 DI1 Cong.
DI2 Conguration
Select the function of the digital input
0=None, 1=DI status, 2=Door function, 3=Door alarm, 4=Defrost start, 5=Main switch, 6=Night setback, 7=Thermostat band, 8=Alarm at closed, 9=Alarm at open, 10=Case cleaning, 11=Forced cooling, 12=Open blinds, 13=Coordinated defrost, 14=Forced closing, 15=Shutdown, 16=Light control, 20=Leak de­tection, 21=Adaptive liquid control
o37
o37 DI2 Cong.
DI3 Conguration
Select the function of the digital input
0=None, 1=DI status, 2=Door function, 3=Door alarm, 4=Defrost start, 5=Main switch, 6=Night setback, 7=Thermostat band, 8=Alarm at closed, 9=Alarm at open, 10=Case cleaning, 11=Forced cooling, 12=Open blinds, 13=Coordinated defrost, 14=Forced closing, 15=Shutdown, 16=Light control, 20=Leak de­tection, 21=Adaptive liquid control
o84
o84 DI3 Cong
Refrigerant
Select the type of refrigerant. If the required refrigerant is not part of the list, the user dened option can be used. Please contact Dan­foss for detailed information
WARNING:
Wrong selection of refrigerant may cause damage to the system.
0=Not seleted, 6=R13, 7=R13b1, 2=R22, 8=R23, 14=R32, 11=R114, 3=R134a, 12=R142b, 24=R170, 15=R227, 25=R290, 16=R401A, 18=R402A, 19=R404A, 21=R407A, 22=R407B, 20=R407C, 37=R407F, 49=R407H, 23=R410A, 32=R413A, 30=R417A, 31=R422A, 33=R422D, 34=R427A, 35=R438A, 40=R448A, 41=R449A, 48=R449B, 43=R450A, 44=R452B, 45=R454B, 9=R500, 4=R502, 10=R503, 17=R507, 36=R513A, 26=R600, 27=R600a, 5=R717, 28=R744, 46=R1233zdE, 38=R1234ze, 39=R1234yf, 47=R1234zeZ, 29=R1270, 42=R452A, 1=User dened display, 13=User dened
o30
o30 Refrigerant
Refrigerant factor K1
Refrigerant factor for a custom refrigerant - please contact Danfoss for detailed information
P83
P83 RfgFac.K1
AK-CC55 Multi Coil

AK-CC55 connect menu (SW ver. 1.8x)

Start / Stop

Table 25: Start / Stop
Conguration
Table 26: Conguration
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 40
Function
Description
Values
Code
Short name
Refrigerant factor K2
Refrigerant factor for a custom refrigerant - please contact Danfoss for detailed information
P84
P84 RfgFac.K2
Refrigerant factor K3
Refrigerant factor for a custom refrigerant - please contact Danfoss for detailed information
P85
P85 RfgFac.K3
Refrigerant factor A1
Refrigerant factor for a custom refrigerant - please contact Danfoss for detailed information
x65
--- Rfg.Fac.A1
Refrigerant factor A2
Refrigerant factor for a custom refrigerant - please contact Danfoss for detailed information
x66
--- Rfg.Fac.A2
Refrigerant factor A3
Refrigerant factor for a custom refrigerant - please contact Danfoss for detailed information
x67
--- Rfg.Fac.A3 Pe Min range
Minimum measuring range for sensor
o20
o20 MinTransPres
Pe Max range
Maximum measuring range for sensor
o21
o21 MaxTransPres
Temperature sensor type
Sensor type for S3, S4 and S5. Normally a Pt 1000 sen­sor with great signal accuracy is used. But you can al­so use a sensor with another signal accuracy. That could e.g. be a PTC sensor (1000 ohm at 25°C) All the mounted sensors S3-S5 must be of the same type. 0 = Pt 10001 = PTC 10002 = NTC 5k3 = NTC 10k
0=Pt 1000, 1=PTC 1000, 2=NTC 5k, 3=NTC 10k
o06
o06 SensorCong
Defrost method
Select method of defrost
0=None, 1=Electrical, 4=Air/Ocycle
d01
d01 Def. method
Defrost stop meth­od
Here you dene whether a defrost cycle is to be stop­ped by time or by a temperature sensor
0=Time, 1=S5 sensor, 2=S4 sensor
d10
d10 DefStopSens.
Defrost stop limit A
When the selected defrost stop sensor reaches the set limit, the defrost cycle is terminated
d02
d02 Def.StopTemp
Food type
When changing the food type the controller will auto­matically adapt temperature setpoints and alarm lim­its according to the selected food type. Please be aware that the setting will revert to "None" after hav­ing been changed.
0=None, 1=Vegetables, 2=Dairy, 3=Meat and sh, 4=Frozen food, 5=Ice cream
r89
r89 Food type
Food temp. sensor
Select the temperature to be used for the food tem­perature representation
1=Ther. air A, 2=Average all, 3=Maximum all
q39
q39 Food sensor Network address
Network address of the controller
o03
o03 Unit addr.
Service pin
If the controller is built into a LonWorks network with data communication, it must have an address, and the system manager must know this address.The ad­dress is sent to the system manager when the menu is set in pos. ON.
IMPORTANT:
Before you set o04, you MUST set the application mode of the controller (The function is not used when the data communication is MODBUS)
0=OFF, 1=ON
o04
o04 Service pin
AK-CC55 Multi Coil
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 41
Function
Description
Values
Code
Short name
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
u00
u00 Ctrl. state
Control state B
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U74
U74 Ctrl.State B
Control state C
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U83
U83 Ctrl.State C
Thermostat air temp. A
Thermostat temperature
u17
u17 Ther. air
Thermostat air temp. B
Thermostat temperature
U77
U77 Ther. Air B
Thermostat air temp. C
Thermostat temperature
U86
U86 Ther. Air C Food temperature A
Readout of food temperature
U72
U72 Food temp.
S4 Air OFF evap. A
Actual sensor value
u16
u16 S4 air temp.
S4 Air OFF evap. B
Actual sensor value
U76
U76 S4 temp B
S4 Air OFF evap. C
Actual sensor value
U85
U85 S4 temp C
Night condition
Status of the day/night operation (night operation:
on/o)
0=OFF, 1=ON
u13
u13 Night Cond.
Thermostat cut-in temp.
Readout of the actual cut-in value for the thermostat
u90
u90 Cutin temp.
Thermostat cut-out temp.
Readout of the actual cut-out value for the thermo­stat
u91
u91 Cutout temp.
Thermostat run time A
Read the ongoing cut-in time for the thermostat or the duration of the last completed cut-in
u18
u18 Ther runtime
Thermostat run time B
Read the ongoing cut-in time for the thermostat or the duration of the last completed cut-in
U78
U78 TherRuntimeB
Thermostat run time C
Read the ongoing cut-in time for the thermostat or the duration of the last completed cut-in
U87
U87 TherRuntimeC
Thermostat band
Readout of which thermostat is used for regula­tion:1= Thermostat band 12= Thermostat band 2
1=Band 1, 2=Band 2
u86
u86 Ther. band Air heater
Actual status of output function
0=OFF, 1=ON
u84
u84 Heat relay
Thermostat mode
Here it is dened how the thermostat is to be operat­ed. Either as an ordinary ON/OFF thermostat or as a modulating thermostat.When operation is ”modulat­ing” the valve will limit the ow of refrigerant so that the temperature variation will be less than for the ON/OFF thermostat.The thermostat dierential (r01) must not be set lower than 2K for ""modulating"".In a decentralised plant you must select the ON/OFF ther­mostat setting."
1=ON/OFF, 2=Modulating, 3=ON/OFF Common
r14
r14 Therm. mode
Thermostat sensor
Select which sensor to be used for the thermostat control
1=Ther. air A, 2=Average all, 3=Maximum all
r99
r99 Ther. sensor
Cut-out 1
Setpoint. The thermostat’s cut-out value when the given thermostat band is in use
r00
r00 Cutout
AK-CC55 Multi Coil

Thermostat control

Table 27: Thermostat control
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 42
Function
Description
Values
Code
Short name
Cut-out 2
Setpoint. The thermostat’s cut-out value when the given thermostat band is in use
r21
r21 Cutout 2
Dierential
When the temperature is higher than the set cut-out + the set dierential, the compressor relay will be cut­in. It will cut-out again when the temperature comes down to the set cut-out limit
r01
r01 Dierential
Max cut-out limit
Setpoint limitation - The controller’s setting range for the thermostat setpoint may be narrowed down, so that too high or too low values are not set accidental­ly - with resulting damages.To avoid a too high set­ting of the setpoint, the max. allowable reference val­ue may be lowered
r02
r02 Max cutout
Min cut-out limit
Setpoint limitation - The controller’s setting range for the thermostat setpoint may be narrowed down, so that too high or too low values are not set accidental­ly - with resulting damages.To avoid a too low setting of the setpoint, the min. allowable reference value may be increased
r03
r03 Min cutout
Night oset
Night setback value.The thermostat’s reference will be the setpoint plus this value when the controller changes over to night operation.
r13
r13 Night oset Air heater neutral zone
Heat function. Set the width of the Neutral Zone for changeover from cooling to heating
r62
r62 Heat NZ
Air heater start de­lay
Time delay on transition from refrigeration phase to heating phase (there is no time delay on transition from heating phase to refrigeration)
r63
r63 HeatStartDel
Melt interval
Melt function. Only for control of MT cases/rooms (-5 to +10°C). The function ensures that the evaporator will not be blocked by ice crystals. Here you set how often the function is to stop the refrigeration and hence transform the ice crystals to water.
r16
r16 MeltInterval
Melt period
Melt period. Here you set how long an ongoing melt function is to last
r17
r17 Melt period
Function
Description
Values
Code
Short name
Alarm status
Actual alarm status
0=OFF, 1=ON
x16
--- Sum alarm
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip
o,
10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
u00
u00 Ctrl. state
Control state B
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip
o,
10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U74
U74 Ctrl.State B
Control state C
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip
o,
10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U83
U83 Ctrl.State C
Alarm air temp. A
Measured temperature for alarm thermostat
u57
u57 Alarm air
Alarm air temp. B
Measured temperature for alarm thermostat
U34
U34 Alarm air B
Alarm air temp. C
Measured temperature for alarm thermostat
U92
U92 Alarm air C
High alarm limit
Readout of actual high alarm limit for the tempera­ture monitoring
y10
--- High al. lim
AK-CC55 Multi Coil

Alarm limits and delays

Table 28: Alarm limits and delays
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 43
Function
Description
Values
Code
Short name
Low alarm limit
Readout of actual low alarm limit for the temperature monitoring
y11
--- Low al. lim S4 Air OFF evap. A
Actual sensor value
u16
u16 S4 air temp.
S4 Air OFF evap. B
Actual sensor value
U76
U76 S4 temp B
S4 Air OFF evap. C
Actual sensor value
U85
U85 S4 temp C
Reset alarms
Command for resetting all alarms, unless they are still active
0=OFF, 1=ON
x15
--- Reset alarm
High alarm limit 1
Upper alarm limit. The limit value is set in absolute value. The limit value will be raised with the night o- set during night operation.
A13
A13 HighLim Air Low alarm limit 1
Lower alarm limit. The limit value is set in absolute value
A14
A14 LowLim Air
High alarm limit 2
Upper alarm limit. The limit value is set in absolute value. The limit value will be raised with the night o- set during night operation.
A20
A20 HighLim2 Air Low alarm limit 2
Lower alarm limit. The limit value is set in absolute value
A21
A21 LowLim2 Air
Alarm delay A
Alarm delay (short alarm delay on air temperature). If the upper or the lower alarm limit values are excee­ded, a timer function will commence. The alarm will not become active until the set time delay has been passed. The time delay is set in minutes
A03
A03 Alarm delay
Alarm delay pull­down A
Alarm delay at tempeature pull down conditions (long alarm delay). This time delay is used during start-up, during defrost and immediately after a de­frost. There will be a change-over to the normal time delay when the temperature has dropped below the set upper alarm limit.
A12
A12 Pulldown del
Door open alarm delay
Time delay for door alarm
A04
A04 DoorOpen del
Door restart inj. de­lay
Start of refrigeration when the door is open. If the door has been left open, refrigeration will be started after the set time.
o89
o89 DoorInjStart
Alarm delay DI 1
Time delay for digital input alarm
A27
A27 Al.Delay DI1
Alarm delay DI 2
Time delay for digital input alarm
A28
A28 Al.Delay DI2
Function
Description
Values
Code
Short name
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip
o,
10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
u00
u00 Ctrl. state
Control state B
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip
o,
10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U74
U74 Ctrl.State B
Control state C
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip
o,
10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U83
U83 Ctrl.State C
Humidity sensor
U57
U57 RH level %
Humidier
Actual status of output function
0=OFF, 1=ON
U58
U58
Humidier
AK-CC55 Multi Coil

Humidity control

Table 29: Humidity control
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 44
Function
Description
Values
Code
Short name
Dehumidier
Actual status of output function
0=OFF, 1=ON
U96
U96 Dehumidier
Humidity control
Select the type of humidity control
0=None, 1=Humidier, 2=Dehumidier
h31
h31 RH function
Humidity cut-in
Setpoint for the humidity control. If the relative hu­midity goes below the setpoint, the humidier is star­ted
h23
h23 RH Cutin SP
Humidity dieren-
tial
Dierential for stopping humidier. Humidication is
stopped when the humidity has increased with the set dierntial above the setpoint
h24
h24 RH Di. Humidity high alarm limit
High alarm limit for relative humidity
h25
h25 RH HighLimAl
Humidity low alarm limit
Low alarm limit for relative humidity
h26
h26 RH LowLimAl
Humidity alarm de­lay
Delay of high and low humidity alarms
h27
h27 RH Al. delay
Humidity sensor ­Min signal
h29
h29 RH Min Value
Humidity sensor ­Max signal
h30
h30 RH Max Value
Humidity ctrl. at de­frost
Select how to control humidity during defrost:No: Hu­midity control is stopped during defrostYes: Normal humidity control is running during defrost
0=No, 1=Yes
h28
h28 RH CtrlAtDef Humidity max. temp.
Maximum limit for thermostat air temperature in or­der for humidity control to run (frost limit)
h32
h32 RH Max temp.
Humidity min. temp.
Minimum limit for thermostat air temperature in or­der for humidity control to run (frost limit)
h33
h33 RH Min temp.
Function
Description
Values
Code
Short name
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip
o,
10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
u00
u00 Ctrl. state
Thermostat air temp. A
Thermostat temperature
u17
u17 Ther. air S4 Air OFF evap. A
Actual sensor value
u16
u16 S4 air temp.
EEV opening A
Actual status of output function
u23
u23 EEV OD %
Pe Evap. pressure
Actual sensor signal
u25
u25 EvapPress Pe
Te Evap. temp.
Temperature converted from pressure
u26
u26 EvapTemp Te
S2 Gas outlet A
Actual sensor value
u20
u20 S2 temp.
Superheat A
Readout of actual superheat at the outlet of the evap­orator
u21
u21 Superheat
Superheat reference A
Readout of the actual superheat reference
u22
u22 SuperheatRef Min. superheat limit
Min. value for the superheat reference
n10
n10 Min SH
Max. superheat limit
Max. value for the superheat reference
n09
n09 Max SH
MOP temperature
MOP temperature. The valve opening degree is re­duced until the evaporating temperature reaches the set MOP limit. If no MOP function is required, select the highest value that corresponds to OFF
n11
n11 MOP temp.
AKV Period time
Period time for the pulse width modulation
n13
n13 AKV Period
Min superheat liq­uid ctrl
Min. value for the superheat reference during adap­tive liquid control
P87
P87 SH Min Liq.
Max superheat liq­uid ctrl.
Max. value for the superheat reference during adap­tive liquid control
P86
P86 SH Max Liq.
AK-CC55 Multi Coil

Injection control

Table 30: Injection control Injection control A
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 45
Function
Description
Values
Code
Short name
Control state B
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U74
U74 Ctrl.State B
Thermostat air temp. B
Thermostat temperature
U77
U77 Ther. Air B S4 Air OFF evap. B
Actual sensor value
U76
U76 S4 temp B
EEV opening B
Actual status of output function
U82
U82 EEV OD % B
Pe Evap. pressure
Actual sensor signal
u25
u25 EvapPress Pe
Te Evap. temp.
Temperature converted from pressure
u26
u26 EvapTemp Te
S2 Gas outlet B
Actual sensor value
U79
U79 S2 temp. B
Superheat B
Readout of actual superheat at the outlet of the evap­orator
U80
U80 Superheat B
Superheat reference B
Readout of the actual superheat reference
U81
U81 SH Ref B
Function
Description
Values
Code
Short name
Control state C
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U83
U83 Ctrl.State C
Thermostat air temp. C
Thermostat temperature
U86
U86 Ther. Air C S4 Air OFF evap. C
Actual sensor value
U85
U85 S4 temp C
EEV opening C
Actual status of output function
U91
U91 EEV OD % C
Pe Evap. pressure
Actual sensor signal
u25
u25 EvapPress Pe
Te Evap. temp.
Temperature converted from pressure
u26
u26 EvapTemp Te
S2 Gas outlet C
Actual sensor value
U88
U88 S2 temp. C
Superheat C
Readout of actual superheat at the outlet of the evap­orator
U89
U89 Superheat C
Superheat reference C
Readout of the actual superheat reference
U90
U90 SH Ref C
AK-CC55 Multi Coil
Table 31: Injection control Injection control B
Table 32: Injection control Injection control C
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 46
Function
Description
Values
Code
Short name
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
u00
u00 Ctrl. state
Control state B
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U74
U74 Ctrl.State B
Control state C
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan de­lay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced clos­ing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U83
U83 Ctrl.State C
Defrost sensor tem­perature A
Actual temperature of selected defrost stop sensor
U73
U73 Def.StopTemp
Defrost sensor tem­perature B
Actual temperature of selected defrost stop sensor
U93
U93 Def.StopTemB
Defrost sensor tem­perature C
Actual temperature of selected defrost stop sensor
U94
U94 Def.StopTemC S5 Evaporator A
Actual sensor value
u09
u09 S5 temp.
S5 Evaporator B
Actual sensor value
u75
u75 S5 temp. B
Defrost A
Actual status of output function
0=OFF, 1=ON
u60
u60 Def. relay
Defrost B
Actual status of output function
0=OFF, 1=ON
u83
u83 Def. relay B
Defrost time A
Read the duration of the ongoing defrost or the dura­tion of the last completed defrost.
u11
u11 Defrost time
Defrost time B
Read the duration of the ongoing defrost or the dura­tion of the last completed defrost.
U75
U75 Def. Time B
Defrost time C
Read the duration of the ongoing defrost or the dura­tion of the last completed defrost.
U84
U84 Def. Time C Start defrost
Command for starting a defrost
0=OFF, 1=ON
x09
--- Def. Start
Stop defrost
Command for stopping an ongoing defrost cycle
0=OFF, 1=ON
x10
--- Def. Stop
Defrost method
Select method of defrost
0=None, 1=Electrical, 4=Air/Ocycle
d01
d01 Def. method
Defrost stop meth­od
Here you dene whether a defrost cycle is to be stop­ped by time or by a temperature sensor
0=Time, 1=S5 sensor, 2=S4 sensor
d10
d10 DefStopSens.
Defrost stop limit A
When the selected defrost stop sensor reaches the set limit, the defrost cycle is terminated
d02
d02 Def.StopTemp
Max. defrost time
Max duration of a defrost cycle. The setting is also used as a safety time if the defrost is stopped on tem­perature. If the selected defrost stop sensor does not reach the set defrost stop temperature limit within the set time, the defrost will be stopped anyway.
d04
d04 Max Def.time
AK-CC55 Multi Coil

Defrost control

Table 33: Defrost control
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 47
Function
Description
Values
Code
Short name
Defrost start interval
The function is zeroset and will start the timer func­tion at each defrost start. When the time has expired the function will start a defrost. The function is used as a simple defrost start, or it may be used as a safe­guard if the normal signal fails to appear. If master/ slave defrost without clock function or without data communication is used, the interval time will be used as max. time between defrosts. If a defrost start via data communcation does not take place, the interval time will be used as max. time between de­frosts.When there is defrost with clock function or da­ta communication, the interval time must be set for a somewhat longer period of time than the planned one. In connection with power failure the interval time will be maintained, and when the power returns the interval time will continue from the maintained value. he interval time is not active when set to 0
d03
d03 Def.Interval
Time staggering power-up
Time staggering for defrost cut-ins during start-up The function is only relevant if you have several refrig­eration appliances or groups where you want the de­frost to be staggered in relation to one another. The function is furthermore only relevant if you have chosen defrost with interval start. The function delays the interval time by the set number of minutes, but it only does it once, and this at the very rst defrost tak­ing place when voltage is connected to the controller. The function will be active after each and every pow­er failure.
d05
d05 Time stagg.
Max. thermostat run time
Defrost on demand. Aggregate refrigeration time set here is the refrigeration time allowed without de­frosts. If the time is passed, a defrost will be started. With setting = 0 the function is not in use.
d18
d18 MaxTherRunT.
Pump down delay
Set the time where the evaporator is emptied of re­frigerant prior to the actual defrost cycle
d16
d16 Pump dwn del
Drip o time
Here you set the time that is to elapse from a defrost and until the compressor is to start again. (The time when water drips o the evaporator).
d06
d06 DripO time
Max. hold time
Max. standby time after coordinated defrost. When a controller has completed a defrost it will wait for a signal tellingthat the refrigeration may be resumed. If this signal fails to appear for one reason or another, the controller itself will start the refrigeration when the standby time has elapsed.
o16
o16 MaxHoldTime
Fan control during defrost
Fan operation during defrost Here you can set how the fan is to operate during defrost.0: Stopped (runs during pump down)1: Running (stopped during "fan delay)2: Running during pump down and defrost. Af­ter that stopped3: Running during pump down and defrost until defrost stop sensor reaches fan stop tem­perature limit
0=OFF, 1=ON, 2=OFF at drip, 3=OFF at high temp
d09
d09 FanDuringDef
Fan start delay
Delay of fan start after defrost. Here you set the time that is to elapse from compressor start after a defrost and until the fan may start again. (The time when re­maining water is transformed into ice on the evapora­tor).
d07
d07 FanStartDel
Fan start tempera­ture
Temperature limit for starting the fans after a defrost. When the measured S5 evaporator temperature is getting below the set limit, the fans are started
d08
d08 FanStartTemp
Fan stop tempera­ture
If the fan control during defrost has been set up for it, the fans can be stopped during the defrost if the de­frost sensor exceeds the set temperature limit
d41
d41 Def Fan Stop
Rail heat during de­frost
Dene how rail heat is controlled during defrost0: Rail heat is OFF all the time1: Rail heat is ON all the time2: Normal rail heat control
0=OFF, 1=ON, 2=Normal control
d27
d27 Railh.at def
Display delay after defrost
Set the maximum time the display should show the defrost code "-d-" after a defrost. The normal temper­ature readout is normally started when the tempera­ture in the case is OK again or if a high temperature alarm is raised.
d40
d40 Disp. d del.
AK-CC55 Multi Coil
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 48
Function
Description
Values
Code
Short name
Defrost schedule
0=No, 1=Yes
t00
t00 Def.Schedule
Def. start 1 - Hours
Time in hours for start of defrost
t01
t01 Def. 1 hr.
Def. start 1 - Minutes
Time in minutes for when defrost cycle is to be star­ted
t11
t11 Def. 1 min. Def. start 2 - Hours
Time in hours for start of defrost
t02
t02 Def. 2 hr.
Def. start 2 - Minutes
Time in minutes for when defrost cycle is to be star­ted
t12
t12 Def. 2 min. Def. start 3 - Hours
Time in hours for start of defrost
t03
t03 Def. 3 hr.
Def. start 3 - Minutes
Time in minutes for when defrost cycle is to be star­ted
t13
t13 Def. 3 min. Def. start 4 - Hours
Time in hours for start of defrost
t04
t04 Def. 4 hr.
Def. start 4 - Minutes
Time in minutes for when defrost cycle is to be star­ted
t14
t14 Def. 4 min. Def. start 5 - Hours
Time in hours for start of defrost
t05
t05 Def. 5 hr.
Def. start 5 - Minutes
Time in minutes for when defrost cycle is to be star­ted
t15
t15 Def. 5 min. Def. start 6 - Hours
Time in hours for start of defrost
t06
t06 Def. 6 hr.
Def. start 6 - Minutes
Time in minutes for when defrost cycle is to be star­ted
t16
t16 Def. 6 min.
Monday - Follow schedule
0=No, 1=Yes
t51
t51 Mon.Schedule
Tuesday - Follow schedule
0=No, 1=Yes
t52
t52 Tue.Schedule
Wednesday - Follow schedule
0=No, 1=Yes
t53
t53 Wed.Schedule
Thursday - Follow schedule
0=No, 1=Yes
t54
t54 Thu.Schedule
Friday - Follow schedule
0=No, 1=Yes
t55
t55 Fri.Schedule
Saturday - Follow schedule
0=No, 1=Yes
t56
t56 Sat.Schedule
Sunday - Follow schedule
0=No, 1=Yes
t57
t57 Sun.Schedule
AK-CC55 Multi Coil

Defrost schedules

Table 34: Defrost schedules
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 49
Function
Description
Values
Code
Short name
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
u00
u00 Ctrl. state
Control state B
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U74
U74 Ctrl.State B
Control state C
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U83
U83 Ctrl.State C
Fan
Actual status of output function
0=OFF, 1=ON
u59
u59 Fan relay
Fan pulsing mode
Pulse operation of fan 0: No pulse operation 1: Pulse operation when the thermostat is cut out2: Pulse op­eration when the thermostat is cut out, but only dur­ing night operation
0=No pulsing, 1=Pulsing cut-out, 2=Pulsing cut-out night
F05
F05 FanPulseMode
Fan period time
Period time for pulsing of fan
F06
F06 Fan cycle
Fan ON cycle
ON time for fan. The ON period is set as a percentage of the period time
F07
F07 Fan ON %
Fan stop high S5 temp.
Fan stop temperature The function stops the fans in an error situation, so that they will not provide power to the appliance. If the defrost sensor registers a high­er temperature than the one set here, the fans will be stopped. There will be re-start at 2 K below the set­ting. The function is not active during a defrost or start-up after a defrost.
F04
F04 FanStop temp
Fan at forced closing
You can set whether fans should be operational or stopped if the function "Forced closing" is activated here. 0: Fans are OFF1: Fans are ON2: Fans are OFF and defrost is not permitted3: Fans are ON and defrost is not permitted
0=OFF, 1=ON, 2=OFF and suppress defrost, 3=ON and suppress defrost
o90
o90 Fan ForcedCl
Fan stop at blinds closing
When blinds are closing the fans are stopped in the dened time delay in order to ensure that the blinds are closed correctly
P65
P65 BlindFanStop
AK-CC55 Multi Coil

Fan control

Table 35: Fan control
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 50
Function
Description
Values
Code
Short name
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
u00
u00 Ctrl. state
Control state B
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U74
U74 Ctrl.State B
Control state C
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U83
U83 Ctrl.State C
Dewpoint
Actual dewpoint received from system manager via network
x18
--- Dew point Rail heat
Actual status of output function
0=OFF, 1=ON
u61
u61 Railh. relay
Rail heat power
Readout of the actual rail power in %
u85
u85 Rail DutyC %
Rail heat PWM
Actual status of output function
U59
U59 Railheat PWM
Rail heat control mode
The rail heat can be controlled in several ways: 0: Rail heat is running all the time 1: Pulse control is used with a timer function following the day/night opera­tion 2: Pulse control is used with a dewpoint function. This function requires that a signal is received about the dewpoint value. The value is measured by a sys­tem manager and sent to the controller via the data communication.
0=ON, 1=Day/Night timer, 2=Dewpoint ctrl.
o85
o85 Railh. mode
Rail heat ON cycle day
Rail heat power during day time. The ON period is set as a percentage of the period
o41
o41 Railh.ONday%
Rail heat ON cycle night
Rail heat power during night time. The ON period is set as a percentage of the period time
o42
o42 Railh.ONngt%
Rail heat period time
Period time for pulsing of rail heat
o43
o43 Railh.cycle
Rail heat PWM - Peri­od time
Period time for the pulse width modulation
P82
P82 RailCyclePWM
Rail heat min. ON cycle
Lowest permitted rail heat power. When the meas­ured dewpoint is below the dened minimum limit the rail heat will run with the set minimum power
o88
o88 Rail Min ON% Dewpoint min. limit
If the measuered dewpoint is below the set value the rail heat is running at minimum heat
o86
o86 DewP Min lim
Dewpoint max. limit
If the measured dewpoint is above the set value the rail heat is maximum
o87
o87 DewP Max lim
AK-CC55 Multi Coil

Railheat control

Table 36: Railheat control
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 51
Function
Description
Values
Code
Short name
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
u00
u00 Ctrl. state
Control state B
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U74
U74 Ctrl.State B
Control state C
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U83
U83 Ctrl.State C
Night condition
Status of the day/night operation (night operation:
on/o)
0=OFF, 1=ON
u13
u13 Night Cond. Light
Actual status of output function
0=OFF, 1=ON
u63
u63 Light relay
Light control mode
Conguration of light function1: Light is controlled via day/night status 2: Light is controlled via data communication and master control parameter "MC Light signal" 3: Light is controlled by door contact on DI input. When the door is opened the relay will cut in. When the door is closed again there will be a time delay of two minutes before the light is switched o. 4: As "2" but if there are any 15-minute network errors, the light will switch on and the night blind will open. 5: Light is controlled via DI input signal
1=Day and night, 2=Network, 3=Door switch, 4=Net­work (Fallback), 5=Digital input
o38
o38 Light cong
Light at Main switch OFF
Dene how light and blinds are to be controlled at Main switch OFF 0: Light is switched o and night blinds are open when the main switch is o 1: Light and night blinds are independent of main switch.
0=OFF, 1=Normal ctrl.
o98
o98 Light MS=O
Case cleaning mode
The status of the function can be seen here or the function can be started manually.0 = Normal opera­tion (no cleaning) 1 = Only fans are running to defrost the evaporator. All other outputs are O. 2 = Cleaning with stopped fans. All outputs are O. If the function is controlled by a digital input signal, the relevant sta­tus can be seen here in the menu.
0=OFF, 1=Fans run, 2=Cleaning
o46
o46 Case clean
Blinds max. open time
Time delay from when blinds have been opened manually until they close again
P60
P60 BlindOpenTim
Function
Description
Values
Code
Short name
Display readout 1
Readout of the temperature shown on the display
u56
u56 Display air
Display readout 2
Readout of the temperature shown on the display
U35
U35 Display air2
Display readout
Select which temperature to show in the display
1=Ther. air A, 2=Average all, 3=Maximum all, 4=S4A and S4B
o97
o97 Displ. Ctrl.
AK-CC55 Multi Coil

Light/Cleaning control

Table 37: Light/Cleaning control

Display control

Table 38: Display control
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 52
Function
Description
Values
Code
Short name
Display readout ad­justment
Correction of the display´s temperature.If the temper­ature at the products and the temperature received by the controller are not identical, an oset adjust­ment of the display temperature can be carried out.
r04
r04 Disp. Adj. K
Temperature unit
Select whether temperatures are to be shown as °C or as °F.
0=Celsius, 1=Fahrenheit
r05
r05 Temp.unit
Display lock
With this setting it is possible to lock the keypad oper­ation of the local display. When not used for some time, the local display will lock the button operations and a special key combination is required in order to use the keypad
0=OFF, 1=ON
P89
P89 LockDispKey
Function
Description
Values
Code
Short name
Alarm relay
Actual status of output function
0=OFF, 1=ON
u62
u62 Alarm relay
Alarm relay priority
Set which alarm priorities that are to activate the alarm relay: 0=Not used, alarm relay is not used1: High. Alarm with high priority will activate relay2: Me­dium. Alarms with high or medium priority will acti­vate the alarm relay3: All. All alarms will activate alarm relay
0=Not used, 1=High Priority, 2=Medium priority, 3=All
P41
P41 Al.Rel.Prio
Mute alarm
When muting alarms, the alarm relay will stop signal­ling the alarm until a new alarm arises
0=OFF, 1=ON
q38
q38 Mute Alarm
High temperature ­Priority
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q28
q28 Hi Temp Prio
Low temperature ­Priority
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q29
q29 Lo Temp Prio
Sensor errors - Prior­ity
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q30
q30 Sensor Prio
DI alarms - Priority
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q31
q31 DIAlarm Prio
Defrost - Priority
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q32
q32 Defrost Prio
Miscellaneous - Pri­ority
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q33
q33 Misc Prio
Injection - Priority
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q34
q34 Inject Prio
Control stopped ­Priority
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q35
q35 CtrlOFF Prio
Leak detection - Pri­ority
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q36
q36 Leak Prio
Humidity ctrl. - Pri­ority
Select the priority of the alarms associated to the alarm group. Be aware - by selecting "Disable" the alarms will not be shown on the display or be routed to the alarm relay or to the network.
0=Disabled, 3=Low, 2=Medium, 1=High
q37
q37 Humid Prio
AK-CC55 Multi Coil

Alarm relay priorities

Table 39: Alarm relay priorities
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 53
Function
Description
Values
Code
Short name
Access code 3
Access code for local display
o05
o05 Acc. code 3
Access code 2
Access code for local display
o64
o64 Acc. code 2
Access code 1
Access code for local display
P88
P88 Acc. code 1
Function
Description
Values
Code
Short name
Network status
Quality of the network communication
U45
U45 Comm. status
Network address
Network address of the controller
o03
o03 Unit addr.
Baudrate
Communication speed of network
1=Auto, 2=9600 Baud, 3=19200 Baud, 4=38400 Baud
x96
--- Bus baudrate
Parity and stop bit
Select parity and stop bit of Modbus messages
0=None, 1=Even, 2=Odd
x97
--- Parity bit
Function
Description
Values
Code
Short name
S4 Air OFF evap. A ­Adjustment
Correction of sensor signal e.g. due to long sensor ca­ble
r09
r09 Adjust S4
S4 Air OFF evap. B ­Adjustment
Correction of sensor signal e.g. due to long sensor ca­ble
q43
q43 Adjust S4B
S4 Air OFF evap. C ­Adjustment
Correction of sensor signal e.g. due to long sensor ca­ble
q44
q44 Adjust S4C
Function
Description
Values
Code
Short name
Make new factory
With this command you save the controller’s actual settings as a new basic setting (the earlier factory set­tings are overwritten).
0=OFF, 1=ON
o67
o67 Make factory Reset to factory set­tings
Command which will revert all controller settings to factory values.
0=OFF, 1=ON
z06
--- Reset factory
Function
Description
Values
Code
Short name
Superheat ctrl. mode A
Select how to control the superheat of the evapora­tor. At adaptive control the superheat reference is adapted automatically to give the best utilization of the evaporator surface. At load based control the su­perheat reference is increased at high loads
1=Adaptive, 2=Load based
n21
n21 SH mode
Superheat close A
Minimum superheat limit where the valve is closing
x68
--- SH close
AFidentForce A
Expert setting - contact Danfoss for further informa­tion
x69
--- AFidentForce
Superheat Kp min. A
Min limit for
amplication factor of the PI controller
adjusting the valve opening degree (expert setting)
x70
--- SH Kp min
Superheat Kp max. A
Max limit for
amplication factor of the PI controller
adjusting the valve opening degree (expert setting)
x71
--- SH Kp max
Superheat Tn A
Integration time of the PI controller adjusting the valve opening degree (expert setting)
x72
--- SH Tn
Te feedback gain A
Gain factor for feedback of evaporating temperature signal Te to the PI controller controlling the superheat (expert setting)
x73
--- Te-gain Kp MTR control A
Amplication
factor for modulating temperature con-
trol (Expert setting)
x77
--- MTR Kpfactor
Tn MTR control A
Integration time for modulating temperature control (Expert setting)
x78
--- MTR Tn sec
AFident A
Expert readout - contact Danfoss for further informa­tion
x79
--- AFident
Calculated Max OD A
Calculated maximum opening degree of the injection valve (expert readout)
x80
--- Max OD %
Superheat close liq­uid ctrl. A
Minimum limit of superheat where the valve is clos­ing during adaptive liquid control
x87
--- SH close Liq
AFident Ee
Expert readout - contact Danfoss for further informa­tion
Y20
--- AFident Ee
Aver.OD Ee
Expert readout - contact Danfoss for further informa­tion
Y21
--- Aver.OD Ee
AK-CC55 Multi Coil

Miscellaneous

Table 40: Miscellaneous Access codes
Table 41: Miscellaneous Network
Table 42: Miscellaneous Sensor adjustment
Table 43: Miscellaneous Factory reset

Advanced

Table 44: Advanced Advanced injection control
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 54
Function
Description
Values
Code
Short name
AFidentForce B
Expert setting - contact Danfoss for further informa­tion
z03
--- AFidenForceB
AFident B
Expert readout - contact Danfoss for further informa­tion
z23
--- AFident B
Calculated Max OD B
Calculated maximum opening degree of the injection valve (expert readout)
z25
--- Max OD % B
AFidentForce C
Expert setting - contact Danfoss for further informa­tion
z04
--- AFidenForceC
AFident C
Expert readout - contact Danfoss for further informa­tion
z24
--- AFident C
Calculated Max OD C
Calculated maximum opening degree of the injection valve (expert readout)
z26
--- Max OD % C
AFident Ee
Expert readout - contact Danfoss for further informa­tion
Y22
--- AFident Ee B
Aver.OD Ee
Expert readout - contact Danfoss for further informa­tion
Y23
--- Aver.OD Ee B
AFident Ee
Expert readout - contact Danfoss for further informa­tion
Y24
--- AFident Ee C
Aver.OD Ee
Expert readout - contact Danfoss for further informa­tion
Y25
--- Aver.OD Ee C
Function
Description
Values
Code
Short name
Control state A
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
u00
u00 Ctrl. state
Control state B
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U74
U74 Ctrl.State B
Control state C
Readout of the actual control state of the controller
0=Normal ctrl., 1=Hold after defrost, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 13=Not_used, 14=Defrost, 15=Fan delay, 17=Door open, 18=Melt period, 19=Modulating temp. control, 20=Emergency control, 23=Adaptive superheat control, 24=Start injection, 25=Manual control, 26=No refrigerant selected, 16=Forced closing, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control
U83
U83 Ctrl.State C
Regulation condi­tion A
Readout of the actual control state of the controller
0=Main switch OFF, 1=Injection start, 2=Superheat ctrl., 3=Fill evap., 4=Defrost, 5=Post defrost, 6=Forced closing, 7=Injection fault, 8=Emergency control, 9=Modulating ctrl., 10=Melt period, 11=Door open, 12=Case cleaning, 13=Cutout, 14=Forced cooling, 15=Shut down
x62
--- Reg. Cond.
Regulation condi­tion B
Readout of the actual control state of the controller
0=Main switch OFF, 1=Injection start, 2=Superheat ctrl., 3=Fill evap., 4=Defrost, 5=Post defrost, 6=Forced closing, 7=Injection fault, 8=Emergency control, 9=Modulating ctrl., 10=Melt period, 11=Door open, 12=Case cleaning, 13=Cutout, 14=Forced cooling, 15=Shut down
z01
--- Reg. Cond B
Regulation condi­tion C
Readout of the actual control state of the controller
0=Main switch OFF, 1=Injection start, 2=Superheat ctrl., 3=Fill evap., 4=Defrost, 5=Post defrost, 6=Forced closing, 7=Injection fault, 8=Emergency control, 9=Modulating ctrl., 10=Melt period, 11=Door open, 12=Case cleaning, 13=Cutout, 14=Forced cooling, 15=Shut down
z02
--- Reg. Cond C
AK-CC55 Multi Coil
Table 45: Advanced Master control
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 55
Function
Description
Values
Code
Short name
MC Actual cut-in temp.
x63
--- Cutin temp.
MC Actual cut-out temp.
x64
--- Cutout temp.
MC Ther. toggle
Master control signal used for switching case load ON/OFF depending on the load condition
0=No action, 1=Toggle ON, 2=Toggle OFF
x81
--- TherToggle
MC Load request
Master control signal used to control the load balance between multiple case controllers on the same suc­tion line
x82
--- LoadReq
MC Max. Te oset
Requested oset to actual evporating temperature in order to keep the air temperature at the actual set­point
x84
--- MaxTeOset MC Liquid control
Master control signal allowing switch to adaptive liq­uid control
0=OFF, 1=ON
x85
--- MC Liq. Ctrl
MC Night setback
Master control signal for changing between day and night time operation
0=OFF, 1=ON
x06
--- Night setbck
MC Case shutdown
Master control signal used to shut down a case for a time period. During shutdown there will be no alarm monitoring
0=OFF, 1=ON
x17
--- Case shutdwn MC Forced closing
Master control signal that will close the injection valve
0=OFF, 1=ON
x07
--- Forced close MC Forced cooling
Master control signal that will provide forced cooling
0=OFF, 1=ON
x08
--- Forced cool.
MC Defrost start
Master control signal for starting a defrost. At adap­tive defrost the defrost might be skipped if the de­frost is not needed
0=OFF, 1=ON
x13
--- MC def.start
MC Defrost state
Read out the actual state of the defrost
0=OFF, 1=ON
x14
--- DefrostState
MC Hold after de­frost
Master control signal used for co-ordinated defrost control to hold cabinets from returning to normal re­frigeration after a defrost until all cabinets have termi­nated defrost
0=OFF, 1=ON
x11
--- HoldAfterDef
MC Stop defrost
Master control signal used to prevent a defrost start in a controller.
0=OFF, 1=ON
x12
--- Disable def.
MC Light signal
Master control signal for control of light via a data communication signal from the system manager
0=OFF, 1=ON
o39
o39 Light remote
MC Actual dewpoint
Master control signal sending the actual measured dewpoint from the system manager to the controller over the network.
x03
--- Act.DewPoint
MC Po load factor
x83
--- Load factor
MC Bluetooth lock
Master control signal that will lock down all Bluetooth data communication
0=OFF, 1=ON
aaa
--- BT lock
MC Min. delta T
Required minimum delta temperature across evapo­rator (S3 - Te) in order to keep the air temperature at the actual setpoint
y04
--- Min Delta T
No. of case sections
No. of sections in the case
z05
--- NoOfEvap
Code
Alarm text
Description
E01
Hardware failure
The controller has a hardware failure
E06
Clock lost time
Clock has lost valid time
E20
Pe Evap. pressure A - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
E24
S2 Gas outlet A - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
E26
S4 Air OFF evap. A - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
E27
S5 Evaporator A - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
E37
S5 Evaporator B - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
E59
Humidity sensor - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
E60
S4 Air OFF evap. B - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
E61
S4 Air OFF evap. C - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
E62
S2 Gas outlet B - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
E63
S2 Gas outlet C - Sensor error
Sensor signal is out of range. Please check the sensor for correct operation
A01
High temperature alarm A
The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.
AK-CC55 Multi Coil

Fault message

In an error situation the alarm LED on the front will be on and the alarm relay will be activated (depending on priority). If you push the alarm button for 3 seconds you can see the alarm report in the display. (Alarm priorities can be changed. See Table 39: Alarm relay priorities.) Here are the messages that may appear:
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 56
Code
Alarm text
Description
A02
Low temperature alarm A
The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.
A04
Door open alarm
The door has been open for a too long time
A05
Max defrost hold time exceeded
The controller has been waiting longer time than permitted after a co-ordinated defrost.
A11
Refrigerant not selected
The refrigerant has not been selected hence control can not be initiated
A15
DI alarm 1
Alarm signal from digital input signal
A16
DI alarm 2
Alarm signal from digital input signal
A45
Main switch set OFF
The controller manin switch has been set to either Stop or Manaual control. Alternatively a digital input set up for "main switch" function, has stopped control
A59
Case in cleaning mode
A case cleaning operation has been started on a case
A70
High temperature alarm B
The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.
A71
Low temperature alarm B
The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.
AA2
CO2 leak detected
CO2 is leaking from the refrigerantion system
AA3
Refrigerant leak detected
Refrigerant is leaking from the refrigeration system
a02
High humidity alarm
The humidity level is too high
a03
Low humidity alarm
The humidity level is too low
a05
High temperature alarm C
The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.
a06
Low temperature alarm C
The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.
Z01
Max defrost time exceeded A
The last defrost cycle has stopped on time instead of set temperature
Z02
Max defrost time exceeded B
The last defrost cycle has stopped on time instead of set temperature
Z03
Max defrost time exceeded C
The last defrost cycle has stopped on time instead of set temperature
AK-CC55 Multi Coil
NOTE:
Data communication
The importance of individual alarms can be dened with a setting. The setting must be carried out in the group "Alarm destinations"
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 57
Ctrl. State/
Code

Operating status

Description
Push the info button for 3 seconds to see status. If there is a status code, it will be shown on the display. The individual status codes have the following meanings:
S0
Normal ctrl.
The controller is running normal control. There is no other control taking priority
S1
Hold after defrost
The controller is waiting for other controllers to terminate coordinated defrost
S4
Drip o
The defrost has terminated and the controller is waiting for drip delay to expire, while the water is dripping o the evaporator
S10
Main switch OFF
The controller has been stopped because the parameter r12 Main switch has been set in OFF or Service position or the controller has been stopped via Main switch function on DI input
S11
Thermostat cut-out
The air temperature has reached the thermostat cut-out value
S14
Defrost
The controller is running a defrost cycle
S15
Fan delay
The evaporator fans are waiting to start after a defrost cycle (d07, Fan start delay and d08, Fan start temperature)
S16
Forced closing
The injection valve has been forced closed via a signal on a digital input or from the system manager (compressor pack is restricted from starting)
S17
Door open
DI signal indicates that the cold room door is open
S18
Melt period
The controller has stopped refrigeration for a short while to turn ice crystals into water and thereby improve air ow through the evaporator
S19
Modulating temp. control
The air temperature is controlled close to the set point via a modulating temperature control
S20
Emergency control
(1)
The air temperature is controlled according to an emergency procedure due to sensor error (Pe, S2 or S4)
S23
Adaptive superheat control
The superheat of the evaporator is optimized
S24
Start injection
The liquid injection into the evaporator has started
S25
Manual control
Main switch has been set in Service position for manual control of outputs
S26
No refrigerant selected
The refrigerant type has not been selected (parameter o30 Refrigerant)
S29
Case cleaning
A case cleaning operation has been initiated via parameter o46 Case cleaning mode or via a signal on a digital input or via the AK-CC55 Connect app
S30
Forced cooling
The thermostat has been overruled to run forced cooling via a signal on a digital input
S32
Power-up delay
The controller has just been powered up and the output control is waiting for the power-up delay to expire (pa­rameter o01, Delay of outputs at power-up)
S33
Air heating
The air heater is energized in order to raise the air temperature (parameters r62, Air heater neutral zone and r63, Air heater start delay)
S45
Shut down controller
The control has been stopped due to a digital input signal or from the system manager
S48
Adaptive liquid control
The superheat control is running adaptive liquid control with reduced superheat for transcritical CO2 systems with ejectors. Signal is provided via digital input or from the system manager
AK-CC55 Multi Coil
Operating status
Table 46: Operating status
(1)
(1)
Emergency control:
Emergency control:
• If Pe or S2 sensor fails, the controller will operate with a safe opening degree based on normally registered opening degree during day and
• If Pe or S2 sensor fails, the controller will operate with a safe opening degree based on normally registered opening degree during day and night operation.
night operation.
• If S4 sensor fails, the thermostat will operate with a registered ON/OFF duty cycle during day and night operation.
• If S4 sensor fails, the thermostat will operate with a registered ON/OFF duty cycle during day and night operation.
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 58
Electrical data
Value
Supply voltage AC [V]
115 V / 230 V, 50/60 Hz
Voltage variation range max. [V]
85 – 265 V
Power consumption [VA]
5 VA
Power ON indicator
Green LED
Electrical cable dimensioning [mm2]
Max.1.5 mm2 multi-core cable
Sensor and measuring data
Value
Sensor S2
Pt 1000 AKS11
Sensor S4, S5
Pt 1000 AKS11 PTC 1000 EKS111 NTC5K EKS211 NTC10K EKS221 sensor
(Both must be of the same type)
Temperature measuring accuracy
Pt1000: -60 – 120 °C. ±0.5 K PTC1000: -60 – 80 °C. ±0.5 K NTC5K: -40 – 80 °C. ±1.0 K NTC10K: -40 – 120 °C. ±1.0 K
Pt1000 sensor specication
±0.3 K at 0 °C ±0.005 K per degree
Pe measuring
AKS 32R Ratiometric pressure transmitter: 10-90%
RH measuring
0 – 10 V Ri > 10K ohm Accuracy +/- 0,3% FS
Input and output relay
specications
Input/output
Description
Digital input
DI1 DI2
Signal from dry contact functions Requirements to contacts: Gold plating Cable length must be max. 15 m Use auxiliary relays when the cable is longer Open loop: 12 V Contact 3.5 mA
Digital input
DI3
115 V / 230 V AC
Solid state output
DO1 (for AKV coil) DO3 DO7
115 V / 230 V AC Max. 0.5 A DO3 and DO7 (No overload protection!) Max. 1 x 20 W AKV for 115 V AC 2 x 20 W AKV for 230 V AC Note: 2 EC coils are not supported.
Relays
DO2 DO4 DO5 DO6
115 V / 230 V AC Load max.: CE. 8 (6)A UL. 8A res. 3FLA 18LRA Load min.: 1VA Inrush: DO5 DO6 TV-5 80A
Analogue output/ PWM
AO1
0 / 10 V Pulse Width Modulated (PWM) max. 15 mA. 0 – 10 V variable, max. 2 mA
AK-CC55 Multi Coil
Product specication

Technical data

Electrical specications
Table 47: Electrical specications
Sensor and measuring data
Table 48: Sensor and measuring data
Input and output relay specications
Table 49: Input and output relay specications
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 59
Danfoss
84B3240
Danfoss
84B3242
Function data
Value
Display
LED 3 digit
External display, AK-CC55 Multi Coil
2 external displays
External display connection
RJ12
Max. display cable length [m]
100 m
Data communication built-in
MODBUS
Data communication option
AK-OB55 Lon RS485 module
Clock battery backup power reserve
4 days
Mounting
DIN rail
Environmental conditions
Value
Ambient temperature range, operation [°C]
0 – 55 °C
Ambient temperature range, transport [°C]
-40 – 70 °C
Enclosure rating IP
IP20
Relative humidity range [%]
20 – 80%, non-condensing
Shocks/Vibrations
No shocks and vibrations allowed
Danfoss
84B3245
AK-CC55 Multi Coil
NOTE:
• DO2, DO4, DO5 and DO6 are 16 A relays.
• Max. load must be observed.
• DO5 / DO6 is recommended for load with high inrush current e.g. EC Fan and LED light.
• All relays are sealed for use with ammable refrigerant like Propane R290.
• Compliance with EN 60 335-2-89: 2010 Annex BB.
Function data
Table 50: Function data
Environmental conditions
Table 51: Environmental conditions

Dimensions

Measurements are in mm.
Figure 43: AK-CC55 Multi Coil
Figure 45: AK-OB55
Figure 44: AK-UI55 Set
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 60
Control
Certication
Mark
Country
Multi Coil
EMC/LVD/RoHS
CEEUMulti Coil
UL recognized
cURus
NAM (US and Canada)
Multi Coil
ACMA (EMC)
RCM
Australia/New Zealand
Multi Coil
LVE/EMC/RoHS
EAC
Russia, Kazakhstan, belarus
Multi Coil
LVD/EMC/RoHS
UA
Ukraine
Display module
Certication
Mark
Country
AK-UI55 Bluetooth
REDCEEU
AK-UI55 Bluetooth
FCC
FCC ID
USA
AK-UI55 Bluetooth
IC (ISED)
IC ID
Canada
AK-UI55 Bluetooth
CMIIT
CMITT ID
China
AK-UI55 Bluetooth
ACMA (EMC/Wireless)
RCM
Australia
AK-UI55 Bluetooth
RSM (EMC/Wireless)
RCM
New Zealand
AK-UI55 Bluetooth
EMC/LVD/Wireless
UA
Ukraine
AK-UI55 Info
EMC/LVD
UA
Ukraine
AK-UI55 Info
ACMA (EMC)
RCM
Australia
AK-UI55 Info
RSM (EMC)
RCM
New Zealand
AK-UI55 Info
RoHS
EAC
Russia, Kazakhstan, belarus
AK-UI55 Set
EMC/LVD
UA
Ukraine
AK-UI55 Set
ACMA (EMC)
RCM
Australia
AK-UI55 Set
RSM (EMC)
RCM
New Zealand
AK-UI55 Set
RoHS
EAC
Russia, Kazakhstan, belarus
Option module
Certication
Mark
Country
AK-OB55 LoN
EMC/LVD
UA
Ukraine
AK-CC55 Multi Coil
Certicates, declarations, and approvals
The list contains all certicates, declarations, and approvals for this product type. Individual code number may have some or all of these approvals, and certain local approvals may not appear on the list.
Some approvals may change over time. You can check the most current status at danfoss.com or contact your local Danfoss representative if you have any questions.
Table 52: Controller
Table 53: Display module
Table 54: Option module
Controllers/displays/option module:
CB certicate including all deviation according to IEC 60730-1 and 2-9
Relays:
Tested according to IEC 60079-15
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 61
AK-CC55 Multi Coil

Statements for the AK-UI55 Bluetooth display

FCC COMPLIANCE STATEMENT
CAUTION:
Changes or modications not expressly approved could void your authority to use this equipment This device complies with Part 15 of the FCC Rules. Operation to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
INDUSTRY CANADA STATEMENT
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 62

Online support

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Danfoss oers a wide range of support along with our products, including digital product information, software, mobile apps, and expert guidance. See the possibilities below.
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The Danfoss Product Store is your one-stop shop for everything product related—no matter where you are in the world or what area of the cooling industry you work in. Get quick access to essential information like product specs, code numbers, technical documentation, certications, accessories, and more. Start browsing at store.danfoss.com.
Find technical documentation
Find the technical documentation you need to get your project up and running. Get direct access to our ocial collection of data sheets, certicates and declarations, manuals and guides, 3D models and drawings, case stories, brochures, and much more.
Start searching now at www.danfoss.com/en/service-and-support/documentation.
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Create your Danfoss Learning account for free at www.danfoss.com/en/service-and-support/learning.
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Find your local Danfoss website here: www.danfoss.com/en/choose-region.
AK-CC55 Connect
Make service easy with the free AK-CC55 Connect app. Via a Danfoss Bluetooth display you can connect to an AK-CC55 case controller and get a visual overview of the display functions. The app ensures smooth interaction with a Danfoss AK-CC55 case controller in a user-friendly design.
Download the app here:
Any information, including, but not limited to information on selection of product, its application or use, product design, weight, dimensions, capacity or any other technical data in product manuals, catalogues descriptions, advertisements, etc. and whether made available in writing, orally, electronically, online or via download, shall be considered informative, and is only binding if and to the extent, explicit reference is made in a quotation or order conrmation. Danfoss cannot accept any responsibility for possible errors in catalogues, brochures, videos and other material. Danfoss reserves the right to alter its products without notice. This also applies to products ordered but not delivered provided that such alterations can be made without changes to form, t or function of the product. All trademarks in this material are property of Danfoss A/S or Danfoss group companies. Danfoss and the Danfoss logo are trademarks of Danfoss A/S. All rights reserved.
© Danfoss | Climate Solutions | 2021.04 BC365022028193en-000101 | 63
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