Danfoss AK-CC55 Single Coil, AK-CC55 Single Coil UI User guide

User Guide

Case/room controller (EEV) Type AK-CC55 Single Coil and

AK-CC55 Single Coil UI

SW Ver. 1.7x

For refrigeration appliances and cold storage rooms.

AK-CC55 Single Coil and AK-CC55 Single Coil UI

The temperature in the appliance is registered by one or two temperature sensors which are located in the air ow before the evaporator (S3) or after the evaporator (S4) respectively. A setting for thermostat, alarm thermostat and display reading determines the inuence the two sensor values should have for each individual function.

In addition, product sensor S6, which can be optionally placed in the appliance, can be used for registration and alarming of the temperature near the food items.

The temperature of the evaporator is registered with the S5 sensor which can be used as a defrosting sensor.

In addition to the output of the electronic AKV injection valve, the controller has relay outputs which are dened by the application setting.

Figure 1: AK-CC55 with evaporator, AKV valve and sensor positions

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

3 x AKV

Digital Output3554

Digital input

1 (2)

3 (2)

Analogue Output1111

Analogue Input

5 (4)

6 (7)

Display

1 remote

2 remote

1 remote + 1 Integrated

2 remote

Comm. module

Modbus

Optional comm. 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

Two compressorsxx

Heating functionxx

Control of air humidity

x

Adaptive superheat

xxx

Adaptive liquid control (zero superheat control for transcritical CO2 systems with liquid ejectors)

xxx

Adaptive defrosting

x

Product sensor

x

Oil recovery

x

RS485 Lon, option (AK-OB55)

x

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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

Remote Display Service App

AKA 245: LON units only and max 250 controller parameters

System Manager

Display Bus

Modbus

LON/ TCP/IP (SNMP)

Modbus

LON/ TCP/IP (SNMP)

Bluetooth

AK-UI55 Bluetooth

AK-UI55 Set

AK-UI55 Info

Smart Device (iOS or Android)

AK-CC55 Connect

AK-CC55 Single Coil UI

AK-CC55 Multi Coil

AK-CC55 Compact

KoolProg

Case Controller

Danfoss

80G8333

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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

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

Enclosure with built-in setting display. Typically used for cold rooms.

Danfoss

84B8274

For controllers with built-in, only one external display can be connected.

Danfoss

84B8239

AK-CC55 Single Coil and AK-CC55 Single Coil UI

AK-CC55 Single Coil and Single Coil UI

AK-CC55 Single Coil – Controlling one EEV valve.

An application mode setting will congure inputs and outputs for the desired use. There are nine applications to choose from. Regulation is performed using an AKV expansion valve or an external stepper driver via Analogue Output A01.

AK-CC55 Single Coil UI

Single Coil controller with built-in display. Same functionalities as AK-CC55 Single Coil.

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

Danfoss

84B2732

S2

AKV

p

e

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Controller functionality

Functions

• Day/night thermostat with ON/OFF or modulating principle

• Product sensor S6 with separate alarm limits

• Switch between thermostat settings via digital input

• Adaptive control of superheat

• Adaptive liquid control

• Oil recovery (ushing oil back to condensing unit)

• Adaptive defrosting based on diagnostics

• Start of defrost via schedule, digital input, network or setting display

• Natural, electric or hot gas defrost

• Stop of defrost on time and/or temperature

• Coordination of defrosting among several controllers in a line-up

• Pulsing or ECO control 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 two compressors

• 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)

• Support of user-dened temp. sensor type

• Integrated MODBUS communication with the option of mounting a LonWorks communication card

Injection control

Adaptive superheat control

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.

Figure 7: Adaptive superheat control with AKV valve

The superheat is measured via a 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.

The function contains an adaptive algorithm which independently adjusts the valve’s opening so that the evaporator constantly supplies optimum amount of refrigerant.

S2

P

EKF

0 – 10 V

ETSLLSV

M

Danfoss

84Z8230

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Adaptive liquid control

Adaptive liquid control is used in trans-critical CO2 ejector systems, which allow liquid ow. When adaptive liquid control is initiated, the superheat of the evaporator will be minimized so that a controlled amount of liquid is present at the outlet of the evaporator.

This type of control requires that the controller receives an on/o signal from (for example) a suction accumulator in the suction line.

Figure 8: Adaptive liquid control with AKV valve

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.

 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.

Liquid injection by use of stepper valve

Instead of AKV, an external stepper driver can be connected to AO1 (0 – 10 V) to drive a stepper valve. DO1 (AKV output) is then congured to close a liquid line solenoid valve (LLSV) when the stepper valve output is 0%. The LLSV is also closed at power failure.

Figure 9: Injection control via step motor valve and liquid line solenoid valve (LLSV)

Oil recovery

In some multi evaporator systems, oil might accumulate in the evaporators over time. The oil recovery feature will help to get the oil back to the compressors/suction accumulator.

Oil recovery can be initiated via a digital input signal or as a network signal. When oil recovery is initiated, the valve opening degree will be increased to ush the oil out of the evaporator.

y

x

D

E

A

B

C

Danfoss

84B8328

xyABCDE

Time

Temp%

AKV OD%

Superheat

SH ref

Adaptive liquid control forced cooling

Oil recovery

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Oil recovery has the following control options: 0 = No oil recovery 1 = Adaptive liquid control + Normal fan control 2 = Adaptive liquid control + Fan OFF 3 = Fixed opening degree of valve + Normal fan control 4 = Fixed opening degree of valve + Fan OFF

Adaptive liquid control (option 1 and 2)

When oil recovery is initiated, the injection function will switch to adaptive liquid control, decreasing the superheat reference, increasing the valve opening degree and thereby achieving a controlled amount of liquid refrigerant at the outlet of the evaporator. As the compressor controller at the same time runs with a higher capacity/speed, this combination will result in a higher amount of returned oil.

Figure 10: Adaptive liquid control increases valve opening degree during oil return

Fixed opening degree (option 3 and 4)

When oil recovery is initiated, the injection function will switch to a user-dened opening degree to ood the evaporator with refrigerant and thereby ush the oil back to the compressor/suction accumulator. However, this option provides no control or monitoring of the superheat and it is solely up to the user to ensure that the system design provides a safeguard of the compressors.

Safety

A couple of safety functions are in place to protect the preserved food from too low temperatures during an oil recovery cycle.

If an oil recovery has been ongoing for a longer period than the set “Max. oil recovery time”, oil recovery will be stopped, and normal control resumed.

Oil recovery is stopped if the alarm air temperature decreases below the set low alarm limit.

Temperature control

The temperature in the appliance is registered by one or two temperature sensors which are located in the return air before the evaporator (S3) or after the evaporator (S4) respectively. A setting for the thermostat, night thermostat, alarm thermostat and display reading determines how much the two sensor values should inuence each individual function, e.g. 50% of S4 will produce an equal value from both sensors.

The actual temperature control can take place in two ways:

1.

As an ordinary ON/OFF regulation with a dierential, or

2.

As a modulating control where the temperature variation will not be nearly as high as in ON/OFF control

ON/OFF control

Modulating control

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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 3: Control methods

Food temperature sensor

A separate optional product sensor S6, which may be placed in the appliance, can also be used and can register and monitor the food temperature in the appliance. There are separate alarm limits and time delays for the product sensor.

Temperature monitoring

Just as is possible for the thermostat, the alarm monitoring can be set with a weighting between S3 and S4 so that you can decide how much the two sensor values should inuence the alarm monitoring. Minimum and maximum limits can be set for alarm temperature and time delays. 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 – also for the product sensor.

For the defrost control, separate defrost stop temperature and max. defrost time can be set for each thermostat band. For the compressor control it is possible to disable the second compressor in thermostat band 2 if required.

Figure 11: 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:

AK-CC55 Single Coil and AK-CC55 Single Coil UI

• via an external switch connected to a digital input

• via a signal from the data communication system

Figure 12: Thermostat band function with Night setback

Temperature sensor types

The S2 and S6 sensors always have to be Pt1000 sensors due to the high measuring accuracy.

For the S3, S4 and S5 sensors, the user can select between the following sensor types: 0=Pt1000 (Danfoss AKS 11) 1=PTC1000 (Danfoss EKS 111) 2=NTC 5k (Danfoss EKS 211) 3=NTC 10k (Danfoss EKS 221) 4 = User-dened

If “User-dened” is selected, three sensor measuring points must be provided and based on these three sensor points, a sensor characteristic is generated.

A sensor point is dened by setting a temperature value and the corresponding resistance value at this temperature. The resistance value is set via two values for kohm and ohm respectively. These values can be found in the data sheet for the sensor.

The three sensor points must be:

1.

Lowest temperature in wanted measuring range

2.

Highest temperature value in wanted temperature range

3.

Temp. value in the middle where a high measuring accuracy is required

A sensor error is detected at temperature values below/above the min./max. temperature values typed in for the sensor points.

y

x

A

350

300

250

200

150

100

50

0

-40 -20 0 20 40 60 80

Danfoss

80G8338

xyA

Temp [°C]

R [kohm]

Sensor point (-30 °C, 180 kΩ)

-++°C1÷+

Fan2÷÷O3++°C

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Figure 13: Example of sensor points from a NTC sensor

Limitations:

A user dened temperature sensor can only be be dened within the temperature range from -40 – +60 °C and within the resistance range from 400 – 179.999 ohm.

When applying a new user dened sensor type, please contact Danfoss for validation of compliance and measuring accuracy.

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.

Table 4: 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.

A

B

C

Danfoss

84B8329

S

3

S

4

S

5

M M

ABC

Bypass valve

Suction valve

Hot gas valve

Danfoss

84B8330

S

3

S

4

S

5

M M

Danfoss

84B8331

S

3

S

4

S

5

M M

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Defrost control

Defrost method

The following defrost methods can be selected: 0: None 1: Electrical 2: Hot gas defrost (Simple) 3: Natural

Electrical defrosting

At electrical defrost, an electrical heater is placed in front of the evaporator and the fan will “pull” the hot air through the evaporator during defrosting.

Figure 14: Electrical defrosting

Hot gas defrosting

Remote hot gas defrost is supported in application mode 5. The hot gas defrost sequence covers control of the hot gas valve, suction valve and drain valve. It is intended for smaller systems in e.g. supermarkets – the functional content has not been adapted to industrial systems with large refrigerant charges.

Figure 15: Hot gas defrosting

Simple hot gas defrosting

If hot gas defrost is selected in application 1-3, the compressor will be running during defrost and a hot gas valve (HGV) is bypassing the compressor discharge gas to the evaporator inlet and thereby the evaporator is defrosted.

Natural defrost

At natural defrost, the ice is melted by running the fans and thereby circulating warm air through the evaporator.

Figure 16: Natural defrost

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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 17: Defrost start

Network:

The defrost start signal is received from a system manager via data communication.

Adaptive defrost:

Here defrosting is started based on intelligent registering of evaporator performance.

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 (though, not with application

5) 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

• S4A temperature (with time as safety)

• S5A temperature (with time as safety)

• S5A and S5B temperatures (with time as safety)

When the selected defrost stop sensor reaches the set defrost stop limit, the defrost is terminated. If the defrost stop sensor does not reach the set defrost stop limit within the set max. defrost time, the defrost will be terminated on time.

Minimum defrost time

When using hot gas for defrosting, the heat is coming from within the evaporator, and this means that the S5 sensor is rising fast when the inner layer of ice is melted. This will sometimes cause parts of the evaporator not to be defrosted when defrost is terminated on S5 evaporator temperature.

To prevent this, the user is given the option of setting a minimum defrost time. When a defrost is initiated, it will have to run for the set minimum time even if the set defrost stop limit has been reached by the selected defrost stop sensor.

Defrost sequence

When a defrost is initiated, the controller will run through the following sequence:

BA C D E

Danfoss

84B8332

X

AKV

xABCDETime

Pump down

Defrost

Hold

Drip

Fan delay

Danfoss

84B8333

A B C D E F G

x

H

I

J

AKV

xABCDEFGHIJ

Time

Pump down

Hot gas injection delay

Defrost

Hold

Drain

Drip

Fan delay

Hot gas valve

Drain

Suction

AK-CC55 Single Coil and AK-CC55 Single Coil UI

1.

Pump down: where the evaporator is emptied of refrigerant

2.

Hot gas inj. delay (Hot gas only): where suction valve is given time for closing

3.

Defrost: where the ice on the evaporator is melted

4.

Hold after defrosting: where multiple controllers wait for each other (coordinated defrost)

5.

Drip o: where remaining water is dripping o evaporator

6.

Drain delay (Hot gas only): where the drain valve is opened to drain the liquid refrigerant

7.

Fan delay: where the fans are restarted when the remaining water on the evaporator has turned into ice

Figure 18: Electrical defrost sequence

During an electrical defrost sequence where the defrost heater is ON during defrost, AKV valve is closed and fans are running during defrost but stopped during drip.

Figure 19: Remote hot gas defrost sequence

Remote hot gas defrost sequence where suction valve and drain valves are closed while hot gas valve is injecting hot gas into the evaporator. After defrost, the drain valve is opening to drain the evaporator for liquid refrigerant and then the suction valve is opening. When the water has dripped o the evaporator, liquid injection is started via the AKV valve and the fans start when the evaporator temperature has reached the fans' start temperature.

Fan control during defrost

During the defrost sequence, the evaporator fans can be controlled in one of the following ways:

1.

The fan is OFF in the entire defrost sequence

2.

The fan is ON during the entire defrost sequence except during fan delay state

3.

The fan is ON during defrost state and is OFF in the rest of the defrost sequence

4.

Like option 2, however the fans can be stopped if the selected defrost stop sensor exceeds a set fan stop limit

System manager

Max 10.

Danfoss

84B8268

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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 20: 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.

Adaptive defrosting

The Danfoss adaptive defrost algorithm detects the amount of ice build-up and cancels a scheduled defrost if it is not needed, or it can be set up to only perform defrost if the evaporator air ow is getting interrupted by frost or ice.

The overall concept is based on comparison of the energy uptake on the refrigerant ow side with the energy emission on the air ow side. When the evaporator is clean, an energy balance is assumed, while a growing imbalance can be identied when ice formation is build up on the evaporator surface ending up with blocked

airow.

4 dierent adaptive defrost modes

0 O

1. Monitoring

Can be set up in parallel to other defrost methods and generate an alarm in case of blocked air ow / ice-up of the evaporator. If ash gas issues are detected on the refrigerant ow side, a ash gas alarm is generated.

AK-CC55 Single Coil and AK-CC55 Single Coil UI

2. Adaptive skip day:

Allows the controller to cancel (skip) defrosts scheduled within day time. Defrosts scheduled at night operation will be carried through and not skipped. Only defrosts that are set up via a schedule in the frontend using master control functions or set up via the internal defrost schedule in the controller can be skipped.

3. Adaptive skip day and night:

With this set-up, the controller can allow to cancel (skip) defrosts scheduled both within day time and within night time. For both adaptive skip day and night max. 3 consecutive defrosts can be skipped, whereafter the 4th scheduled defrost will be performed even if only little ice should be present.

4. Full adaptive:

Full Adaptive mode is ideal for applications where defrost is not requested to be performed at a certain time, but can be performed whenever ice is starting to interrupt the airow. It makes sense to combine this mode with the defrost interval timer as a safety timer.

Adaptive defrosting requires the following connections:

• Expansion valve type AKV

• Pe evaporator pressure and S2 gas out temperature

• Temperature signal from both S3 and S4. Sensors must be placed in the airow/channel immediately before / after the evaporator.

• Condensing temperature Tc is distributed via the network from the system manager. If Tc is not received by the case controller, the adaptive defrost function is using default back-up values.

 NOTE:

Adaptive parameters will be reset after a defrost has been initiated or at main switch in stopped or service mode. At start up with a warm evaporator (measured with S2 sensor), the evaporator is presumed clean. If the evaporator temperature is measured below 0.1 °C, adaptive defrost will request a defrost start to secure a clean evaporator.

Min. time between defrosts

There is a preset 2 hours minimum time between defrosts. This avoids that planned defrosts in accordance with the weekly schedule are carried out immediately after an adaptive defrost has been carried out. The time applies from when an adaptive defrost has been completed to when a planned defrost is again permitted. The adaptive defrost will not start defrosting with a shorter interval than the 2 hours either.

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.

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.

Control of two compressors (only with custom set-up)

Two compressor steps can be controlled cyclic or sequentially. At cyclic control, two compressors must be of the same size, while in sequential control compressor step 1 can be larger than step 2.

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Figure 21: Control of two compressors

Cyclic control

When the controller demands refrigeration, it will rst cut in the compressor with the shortest operating time. After the time delay, the second compressor will be cut in.

When the temperature has dropped to ”the middle of the dierential”, the compressor with the longest operation time will be cut out.

The running compressor will continue until the temperature has reached the cut-out value. Then it will cut out. When the temperature again reaches the middle of the dierential, a compressor will again be started.

If one compressor cannot maintain the temperature within the dierential, the second compressor will also be started.

If one of the compressors has run on its own for two hours, the compressors will be changed over so that operational time is balanced.

The two compressors must be of a type that can start up against a high pressure.

The compressor's settings for ”Min. On time” and ”Min. O time” will always have top priority during normal regulation. But if one of the override functions is activated, like e.g. defrost, door open function, case shutdown, forced closing, the ”Min. On time” will be disregarded.

Sequential control

Compressor steps are controlled in the same manner as described for cyclic control, but compressor step 1 will always be started rst and cut out as the last one. No time equalization is available in sequential control mode.

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.

Danfoss

84B2729

o88

o86

100%

o87

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Figure 22: 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 23: Rail heat control, dew point

During defrosting

During defrosting rail heat will be active, 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.

Y

X

100%

50%

0%

A

B

Danfoss

84B8318

XYABTime

Fan speed

Fan

Fan ECO

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Figure 24: 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).

Fan ECO operation (only custom set-up)

Fan ECO operation is used to reduce fan speed during night operation – typically on cabinets with night blinds.

The function is enabled when a relay has been congured for Fan ECO function in one of the applications with custom set-up of relay functions.

The fan economy control (fan speed) is controlled via the two fan outputs:

• Fan output

• Fan Eco output

If the Fan output is activated, then the fan is running with 100% speed. If the Fan ECO output is also activated, then the fan is running with reduced speed (typically 50%). If both fan outputs are de-activated, then the fans are stopped.

Figure 25: Fan ECO control – Fan speed reduced to 50% during night operation

The fans will always run with full speed during day operation, rst stage of case cleaning, defrost, forced cooling and when air heating is active.

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:

AK-CC55 Single Coil and AK-CC55 Single Coil UI

1.

The light is controlled via the day/night function. A digital input setup for light control can switch light ON, if the light is switched o during night

2.

The light is controlled by a system manager via the parameter o39. A digital input setup for light control can switch light ON, if the light is switched o by the system manager.

3.

Light is controlled via the door switch. Light is switched ON when door is opened and switched OFF 2 minutes after the door has been closed.

4.

Like option 2, but here the light is switched ON automatically if the communication to the system manager has been lost for 15 minutes

5.

Light is only controlled via a digital input setup for light control

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 either through the custom set-up night blind output or 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.

When the night blind function is used, the thermostat function can control with dierent weighting between the S3 and S4 sensors. A weighting during day operation and another when the blind is closed.

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).

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 8 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.

Danfoss

80G8330

y

x

A

B

C

xyABC

Time

Temperature

Humidity max temp. dierence

Humidity min temp. dierence

Humidity control enabled

Danfoss

80G8221

y

x

A

SP

B

100%

xyASPB

Time

Humidity

Humidity dierence

Setpoint

Humidier

Danfoss

80G8332

y

x

A

100%

SP

B

xySPAB

Time

Humidity

Setpoint

Humidity dierence

Dehumidier

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Figure 26: 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.

It can be dened whether humidity control is active during defrost or not.

Figure 27: 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.

Figure 28: 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.

Danfoss

84B8269

A

r01

t

º C

r62

B

C

ABC

Refrigeration

Neutral zone

Heat

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

Valve driver alarm at open

++22

Fan alarm at open

++23

Door fan stop+++29

Oil recovery+++30

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Heating function (only with custom set-up)

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 29: 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:

Table 5: Function table and DI settings

Danfoss

84B8238

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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.

Alarm monitoring and stop of fans:

When the door is opened, only the fans are stopped. If the door remains open for a longer time than the set alarm delay, an alarm is triggered and the fans will start running again.

Display

The controller has one or two plugs for an external display. One of the following display types can be connected to a plug:

• 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 30: Controller with two displays

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 Request next defrost

Master control signal used by system manager to see if a controller is requesting that the next defrost has to be carried out

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 Tc temp. mean

Master control signal distributing the condensing temperature signal to the case controllers that are using adaptive defrost. At transcritical CO2 sites the receiver pressure is distributed to the case controllers. This function needs to be set up in the system manager.

MC Po load factor

Calculated load factor for the refrigerated appliance. Used for suction pressure optimization.

MC Key/Bluetooth lock

Master control signal that will lock down all Bluetooth data communication and optionally also lock the display keyboard (parameter P89)

MC Min. delta T

Required minimum delta temperature across evaporator (S3 - Te) in order to keep the air temperature at the actual setpoint

MC Oil Recovery

Master control signal used for starting and stopping an oil recovery sequence

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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 6: Override functionality

Danfoss

84B8277

S₆

S₄

S₃

S₅

S₂

S₃

S₆

S₅

S₄

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Applications

The chapter outlines application examples:

• Standard display case

• Cases with one valve, one evaporator and two refrigeration sections

• Cases with one valve, two evaporators and two refrigeration sections

• Cold rooms

An application setting will congure inputs and outputs so that the controller’s operation interface is reecting the selected application.

In application 9, users can custom dene the functions of relay 2 (DO1 is always AKV), e.g.:

• Controlling two compressors

• Controlling the night blind

• Controlling the heat function

• ECO operations of fans

Figure 31: Standard display case, upright or normal, with one evaporator

Figure 32: Back-to-back cabinet with one evaporator

Figure 33: Back-to-back cabinet with two evaporators and one AKV valve

40

41

42

5V

s

AI1

43

44

AI2

45

46

AI3

47

48

AI4

49

50

AI5

51

52

AI6

53

54 DI1/ AI7*

60

61

DI2

70

71 AO1* PWM

83

84

85

B

A

MODBUS

115 - 230V AC

L

N

1

2

3

8

9

7

10

11

12

DO2

13

14

DO3

15

16

17

DO4

18

19

20

DO5

21

22

DO6

115-230V AC

30

31

DI3

Danfoss

84B3234

Application 1-3

Plugin cabinets. Cabinets with dierent output combinations of alarm, rail heat and light.

Application 4

Remote cabinet including alarm, rail heat, defrost, light and fan.

Application 5

Remote hot gas defrost with suction, drain and hot gas valve.

Application 6

Back-to-back cabinet with one evaporator.

Application 7

Back-to-back cabinet with two evaporators.

Application 8

Cold storage room with defrost and simple humidity control.

Application 9

Custom

dened application, where the outputs can be congured according to custom requirements

No.

Application description

DO1

DO2

DO3

DO4

DO5

DO6

AO1

1

Plug-in cabinet

2

Plug-in cabinet

3

Plug-in cabinet

4

Remote cabinet

5

Remote Hot gas defrost

(Suction)

(Drain)

(Hot gas)

6

Back-to-back cabinet

7

Back-to-back cabinet

B

A

8

Cold storage room

humidity

9

User def. cong.

User def.

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Figure 34: Cold room conguration with door and light heat control function

AK-CC55 connections and application options

Upper and lower connection labels are laid out as shown in gure:

Figure 35: Electrical connections AK-CC55 Single Coil

AK-CC55 Single Coil is optimised for control of one expansion valve + dierent combinations of light, rail heat and alarm relays. It has 6 Digital Outputs (DO), known as DO1 – DO6, 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. AI7 (DI1) can be congured as S5B defrost sensor in application 1-6 and application 9.

DO1 will be congured for a liquid line solenoid valve if the analogue output AO1 is congured for control of a stepper valve driver.

Table 7: The controller covers the following nine applications:

Table 8: Application with digital and analogue output specication

Pe

Evaporating pressure

S2

Gas outlet of evaporator

S3

Return air temperature

S4

Discharge air temperature

S5

Evaporator temperature

S6

Product temperature

S3B

Return air temperature on second cooling section

S5B

Evaporator temperature on second evaporator or extra evaporator sensor on single evaporator

RH%

Relative humidity sensor

No.

Application description

AI1

AI2

AI3

AI4

AI5

AI6

AI7/DI1

DI2

DI3

1

Plug-in cabinet

PeS2S3S4S5S62

Plug-in cabinet

PeS2S3S4S5S63

Plug-in cabinet

PeS2S3S4S5S64

Remote cabinet

PeS2S3S4S5S65

Remote Hot gas defrost

PeS2S3S4S5S66

Back-to-back cabinet

PeS2S3S4S5

S3B

7

Back-to-back cabinet

PeS2S3S4S5

S3B

S5B

8

Cold storage room

PeS2S3S4S5S6RH%

9

User def. cong.

PeS2S3S4S5

S6

115 – 230 V AC

AKV Alarm Comp. Defrost Light Fan

DI3

115 – 230 V AC

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

L N

40

5V

s

Pe

0 – 10 V/

PWM

S2 S3 S4 S5 S6 DI1/

AI7

DI2 AO1

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

84B3247

AK-CC55 Single Coil and AK-CC55 Single Coil UI

= Optional use

Table 9: Sensor description

Table 10: Application with digital and analogue output specication

= Optional use

Application set-ups and IO connections

Figure 36: Connections for application 1

115 – 230 V AC

AKV Railheat Comp. Defrost Light Fan

DI3

115 – 230 V AC

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

L N

40

5V

s

Pe

0 – 10 V/

PWM

S2 S3 S4 S5 S6 DI2 AO1

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

84B3248

DI1/ AI7

115 – 230 V AC

AKV Alarm Comp. Defrost Railheat Fan

DI3

115 – 230 V AC

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

L N

40

5V

s

Pe

0 – 10 V/

PWM

S2 S3 S4 S5 S6 DI2 AO1

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

Danfoss

84B3249

DI1/ AI7

115 – 230 V AC

AKV Alarm Railheat Defrost Light Fan

DI3

115 – 230 V AC

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

L N

40

5V

s

Pe

0 – 10 V/

PWM

S2 S3 S4 S5 S6 DI2 AO1

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

Danfoss

84B3250

DI1/ AI7

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Figure 37: Connections for application 2

Figure 38: Connections for application 3

Figure 39: Connections for application 4

115 – 230 V AC

AKV Suction Drain HG Light Fan

DI3

115 – 230 V AC

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

L N

40

5V

s

Pe

0 – 10 V/

PWM

S2 S3 S4 S5 S6 DI2 AO1

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

Danfoss

84B3251

DI1/ AI7

115 – 230 V AC

AKV Alarm Railheat Defrost Light Fan

DI3

115 – 230 V AC

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

L N

40

5V

s

Pe

0 – 10 V/

PWM

S2 S3 S4 S5 S3B DI2 AO1

6

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

84B3252

DI1/ AI7

115 – 230 V AC

AKV Alarm Defrost B Defrost A Light Fan

DI3

115 – 230 V AC

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

L N

AB

40

5V

s

Pe

0 – 10 V/

PWM

S2 S3 S4 S5 S3B S5B DI2 AO1

7

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

84B3253

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Figure 40: Connections for application 5

Figure 41: Connections for application 6

Figure 42: Connections for application 7

115 – 230 V AC

AKV Alarm Humidity Defrost Light Fan

DI3

115 – 230 V AC

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

L N

40

5V

s

Pe

0 – 10 V/

PWM

S2 S3 S4 S5 S6 DI2 AO1

8

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

RH

U

0 10

Danfoss

84B3254

DI1/ AI7

115 – 230 V AC

AKV DO2 DO3 DO4

Custom set-up

DO5 DO6

DI3

115 – 230 V AC

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

L N

40

5V

s

Pe

0 – 10 V/

PWM

S2 S3 S4 S5 S6 DI2 AO1

9

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

84B3266

DI1/ AI7

Danfoss

84B8271

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Figure 43: Connections for application 8

Figure 44: Connections for application 9

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 are applicable to multiple application options.

Figure 45: Product identication

230 V AC (115 AC)

AO1/ PWM

60 61 70 71

SSR

Danfoss

80G8234

AK-CC55 Single Coil and AK-CC55 Single Coil UI

AK-CC55 Single Coil connections

Data communication

Figure 46: 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.

AKV info

Figure 47: AKV info

230 V or 115 V AC coil Max. 0.5 A

External solid state relay for rail heat

Figure 48: External solid state relay for rail heat

0 / 10 V Pulse Width Modulated (PWM) Max. 15 mA.

A

AKS 32R

B

out

C

ABC

Black

Brown

Blue

Danfoss

84B8239

AK-CC55 Single Coil and AK-CC55 Single Coil UI

AKS 32R info

Figure 49: AKS 32R info

NOTE:



A ratiometric pressure transmitter with a 5 V, 10 – 90% voltage output signal must be used.

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 50: 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 51: External display AK-UI55

Display 084B4075 / 084B4076 / 084B4077

Cable 3 m: 084B4078 Cable 6 m: 084B4079 (Total length: max. 100 m)

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 49: AKS 32R info.

 NOTE:

When replacing AK-CC 550 with AK-CC55, S and ground must be switched.

AI2 - AI7

Primarily for temperature inputs

• S2 Pt 1000 ohm sensor AKS11, placed at the evaporator outlet

• S3, S4, S5 Pt 1000 AKS11, PTC 1000 EKS111, NTC5K EKS211, NTC10K EKS221 or a user-dened sensor type. All have to be of the same type.

• S3, return air sensor, placed in the warm air before the evaporator

• S4, discharge air sensor, placed in the cold air after the evaporator (the need for either S3 or S4 can be selected in the conguration)

•

S5, defrost sensor, placed in the evaporator

• S6, Pt 1000 ohm sensor, food temperature sensor placed in-between the food products

(If the DI1 input is used for a temperature measurement e.g. S5B, it will appear as AI7.)

DI1

Digital input signal

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

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 Can be used to drive an external stepper driver.

• 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

 NOTE:

When replacing AK-CC 550 with AK-CC55 A+, B- and shield must be switched.

Supply voltage

230 V AC or 115 V AC

DO1

• AKV valve Connection of expansion valve type AKV, AKVA, AKVH or AKVP. The coil must be a 230 V or 115 V AC coil.

• Liquid line solenoid valve Connection of normally closed valve in connection with stepper valve.

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.

• Light, Rail heat, Compressor, Night blind There is connection between terminal 10 and 11 (10 and 12 at light) when the function is on.

• Suction line valve There is connection between terminal 10 and 11 when the suction line must be open.

DO3

• Compressor, Rail heat, Defrost, Drain valve, Humidity There is connection between terminal 13 and 14 when the function must be active.

DO4

• Defrost There is connection between terminal 15 and 16 when defrosting takes place.

• Hot gas There is connection between terminal 15 and 16 when the hot gas valves must open.

 NOTE:

When replacing AK-CC 550 with AK-CC55, wires must be switched.

DO5

• Light There is connection between terminal 18 and 20 when the function must be active.

• Rail heat There is connection between terminal 18 and 19 when the rail heat must be on.

DO6

• Fan There is connection between terminal 21 and 22 when the fan is on.

DO2-DO6 + AO1 and Application 9

Here, the dierent outputs can be custom dened in q02-q09

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.

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Connections

Table 11: Connection details

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Display (RJ12 plug)

If external readings/operation of the controller is required, a display can be connected. If there is no display on the front, two external displays 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.

NOTE:



When replacing AK-CC 550 with AK-CC55, AKA 16X remote displays and cables have to be replaced with new AKUI55 displays and cables.

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.

Replacing AK-CC 550 with AK-CC55

 NOTE:

Be aware when exchanging an AK-CC 550 controller with a new AK-CC55 controller - new wiring principles!

AK-CC 550

AK-CC55

Pressure sensor has new connection – signal and ground are switched

SPDT relays have a new wiring scheme – NO and NC terminals are switched (e.g. defrost heater on when it should be o)

Modbus has new connection scheme (A,B and screen)

New AK-UI55 displays and cables with 6 wires vs. 3 wires for EKA 16x

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Table 12: Replacing AK-CC 550 with AK-CC55

• AK-CC55 does not support two EEC coils connected to one AKV output.

• Pressure transmitter can be shared between AK-CC 550 and AK-CC55.

• DI2 defrost coordination can be wired between AK-CC 550 and AK-CC55.

012

The display keys are always operative

The display keys will be locked automatically when not used for some time and the keyboard must be

unlocked by pressing the arrow-up and arrow-down keys at the same time.

The display keys will be locked and unlocked by means of a master control signal from the System Manager.

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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 located on the front of the controller or 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. The display can be placed at a distance of up to 100 metres from the controller. 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.

To prevent any passing-by user from making unauthorized changes, the access to the display menu is restricted by access codes.

Besides this, the parameter P89 provides the following options for handling of the display keyboard:

ABCDE

F

Danfoss

84B8325

D

C

A

B

E

F

Lights up in event of: Energy optimization, Cool-

ing, Defrosting, Fan operation

Lights in event of alarm

Long press (3 seconds) on alarm button alarm —

relay is reset — alarm code displayed — e.g. “A1”

Long press (3 seconds) gives access to the infor-

mation menu “InF”

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.

SET: Long press (3 seconds) gives access to the

“SEt” menu. If the operation is locked with a pass-

word, “PS” is shown. Enter the code.

Shows the setting for a chosen parameter / saves a

changed setting. Short press gives access to enter-

ing of the thermostat’s cut-out limit.

Display readout

Denomination

-d-

Defrost is in progress

Err

The temperature cannot be displayed due to a sensor error

Err1

The display cannot load data from the controller. Disconnect and then reconnect the display

Err2

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 Single Coil and AK-CC55 Single Coil UI

Figure 52: Operating via AK-UI55 Set

Table 13: 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.

(PS)

<

r12

<

o61

r-- o03

A-- r89

c-- r00

r15

r61

A36

o17

d--

o30

n--

o20

F--

o21

t--

d01

h--

d03

o--

d10

p--

d04

q--

d02

u--

<

SET

cFg

Set

Danfoss

84B8272

SET button, 3 s: Configuration settings

PS: Password (if any)

Main switch

Menu groups

Parameter groups when operating via display

Figure 53: SET button parameter list

Figure 54: Info button parameter list

Get a good start

With the following procedure you can start regulation very quickly:

1.

2.

3.

4.

5.

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 on Page 31 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

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

-15 °C

Lower alarm limit (A14)

0 °C

-5 °C

-30 °C

Upper alarm limit for S6 (A22)

14 °C

8 °C

-15 °C

Lower alarm limit for S6 (A23)

0 °C

-5 °C

-30 °C

AK-CC55 Single Coil and AK-CC55 Single Coil UI

6.

Open parameter r89 and set the number for the array of presettings. The few selected settings will now be transferred to the menu

7.

Set the desired cut-out temperature r00

8.

Set the weighted thermostat air temperature between S4 and S3 sensor r15

9.

Set the weighted thermostat air temperature between S4 and S3 during night operation r61

10.

Set the weighted alarm air temperature between S4 and S3 A36

11.

Set the weighted display readout between S4 and S3 o17

12.

Select refrigerant via parameter o30

13.

Set the pressure transmitter min. and max. range via parameter o20 and o21

14.

Set the desired defrost method in d01

15.

Set the interval time between defrost starts in d03

16.

Set the desired defrost sensor in d10

17.

Set the maximum defrost time in d04

18.

Set the defrost stop temperature in d02

19.

Open parameter r12 and start the regulation

20.

Go through the parameter list and change the factory values where needed

21.

Get the controller up and running on network:

◦ MODBUS: Activate scan function in system unit ◦ If another data communication card is used in the controller:

▪ Lon RS485: Activate the function o04 ▪ Ethernet: Use the MAC address

Table 14: Food type settings

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 1-9 the parameter is applicable.

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

Cut-out 1

0-0

r00*********r03

r02

2.0 °C

Dierential 1

1-2

r01*********0.1 °C

20.0 °C

2.0 °C

Max cut-out limit

0-2

r02*********r03

50.0 °C

Min cut-out limit

0-2

r03*********-60.0 °C

r02

-60.0 °C

Display readout adjustment

1-2

r04*********-10.0 °C

10.0 °C

0.0 °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

S3 Air ON evap. A - Adjustment

1-2

r10*********-10.0 °C

10.0 °C

0.0 °C

S5 Evaporator A - Adjustment

1-2

r11*********-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

1-2

r14*********121

Thermostat sensor S4 %

1-2

r15*********0 %

100 %

100%

Melt interval

1-2

r16*********0 h

10 h

1 h

Melt period

1-2

r17*********0 min

30 min

5 min

S2 Gas outlet A - Adjustment

1-2

r19*********-10.0 °C

10.0 °C

0.0 °C

Cut-out 2

0-2

r21*********-60.0 °C

50.0 °C

2.0 °C

S3 Air ON evap. B - Adjustment

1-2

r53**

-10.0 °C

10.0 °C

0.0 °C

S6 product temp. - Adjustment

1-2

r59*******-10.0 °C

10.0 °C

0.0 °C

Thermostat sensor S4 % night

1-2

r61*********0 %

100 %

100%

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

Food type

0=None, 1=Vegetables, 2=Dairy, 3=Meat and sh, 4=Frozen food, 5=Ice cream

1-2

(1)

r89*********050

Dierential 2

1-2

r93*********0.1 °C

20.0 °C

2.0 °C

S4 frost protection

1-2

r98*********-60.0 °C

50.0 °C

-60.0 °C

Function

Values

R-W

Code123456789Min. 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 pull down A

1-2

A12*********0 min

240 min

90 min

AK-CC55 Single Coil and AK-CC55 Single Coil UI

AK-UI55 display menu (SW ver. 1.7x)

Thermostat

Table 15: Thermostat

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Alarm settings

Table 16: Alarm settings

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

High alarm limit 1

1-2

A13*********-60.0 °C

50.0 °C

8.0 °C

Low alarm limit 1

1-2

A14*********-60.0 °C

50.0 °C

-30.0 °C

High alarm limit 2

1-2

A20*********-60.0 °C

50.0 °C

8.0 °C

Low alarm limit 2

1-2

A21*********-60.0 °C

50.0 °C

-30.0 °C

S6 High alarm limit 1

1-2

A22*******-60.0 °C

50.0 °C

8.0 °C

S6 Low alarm limit 1

1-2

A23*******-60.0 °C

50.0 °C

-30.0 °C

S6 High alarm limit 2

1-2

A24*******-60.0 °C

50.0 °C

8.0 °C

S6 Low alarm limit 2

1-2

A25*******-60.0 °C

50.0 °C

-30.0 °C

S6 alarm delay

1-2

A26*******0 min

240 min

60 min

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

Alarm sensor S4% A

1-2

A36*********0 %

100 %

100%

S6 alarm pull down delay

1-2

A52*******0 min

240 min

90 min

Alarm delay B

1-2

A53**

0 min

240 min

30 min

Use product sensor S6

0=No, 1=Yes

1-2

(1)

a01*******010

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

Min ON time

1-2

c01****

0 min

30 min

0 min

Min OFF time

1-2

c02****

0 min

30 min

0 min

Delay between comp.

1-2

c05*0 s

999 s

5 s

Step control mode

1=Sequential, 2=Cyclic

1-2

c08*122

Comp. 2 ctrl. Th. band 2

0=OFF, 1=ON

1-2

c85*011

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

Defrost method

0=None, 1=Electrical, 2=Hot gas, 4=Air/Ocycle

1-3

d01*********041

Defrost stop limit 1

1-2

d02*********0.0 °C

50.0 °C

6.0 °C

Defrost start interval

1-2

d03*********0 h

240 h

8 h

Max. defrost time 1

1-2

d04*********0 min

360 min

45 min

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*********-60.0 °C

10.0 °C

-5.0 °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, 3=S5A and S5B

1-2

d10*********030

Pump down delay

1-2

d16*********0 min

60 min

0 min

Drain delay

1-2

d17*0 min

60 min

0 min

Max. thermostat run time

1-2

d18*********0 h

240 h

0 h

Adaptive defrost mode

0=OFF, 1=Monitoring, 2=Skip day, 3=Skip day/ night, 4=Full adaptive

1-2

(1)

d21*********040

Hot gas injection delay

1-2

d23*0 min

60 min

0 min

Min. defrost time

1-2

d24*********0 min

d04

0 min

Rail heat during defrost

0=OFF, 1=ON, 2=Normal control

1-2

d27*********021

Defrost stop limit 2

1-2

d28*********0.0 °C

50.0 °C

6.0 °C

Max. defrost time 2

1-2

d29*********d24

360 min

45 min

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

AK-CC55 Single Coil and AK-CC55 Single Coil UI

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Compressor

Table 17: Compressor

Defrost

Table 18: Defrost

Function

Values

R-W

Code123456789Min. 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*********-60.0 °C

15.0 °C

AKV Period time

1-2

(1)

n13*********3 s

6 s

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

Fan stop high S5 temp.

1-2

F04*********-60.0 °C

50.0 °C

Fan pulsing mode

0=No pulsing, 1=Pulsing cut-out, 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

Code123456789Min. value

Max. value

Fact. value

Defrost schedule

0=No, 1=Yes

1-2

t00*********010

Def. start 1 - Hours

1-2

t01*********0 h

23 h

0 h

Def. start 1 - Minutes

1-2

t11*********0 min

59 min

0 min

Def. start 2 - Hours

1-2

t02*********0 h

23 h

0 h

Def. start 2 - Minutes

1-2

t12*********0 min

59 min

0 min

Def. start 3 - Hours

1-2

t03*********0 h

23 h

0 h

Def. start 3 - Minutes

1-2

t13*********0 min

59 min

0 min

Def. start 4 - Hours

1-2

t04*********0 h

23 h

0 h

Def. start 4 - Minutes

1-2

t14*********0 min

59 min

0 min

Def. start 5 - Hours

1-2

t05*********0 h

23 h

0 h

Def. start 5 - Minutes

1-2

t15*********0 min

59 min

0 min

Def. start 6 - Hours

1-2

t06*********0 h

23 h

0 h

Def. start 6 - Minutes

1-2

t16*********0 min

59 min

0 min

Time hours

0-1

t07*********0 h

23 h

0 h

Time minutes

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

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

AK-CC55 Single Coil and AK-CC55 Single Coil UI

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Injection control

Table 19: Injection control

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Fan control

Table 20: Fan control

Defrost schedule

Table 21: Defrost schedule

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

Humidity cut-in

0-2

h23*0 RH%

100 RH%

70RH%

Humidity dierential

1-2

h24*1 RH%

30 RH%

5RH%

Humidity high alarm limit

1-2

h25*0 RH%

100 RH%

100RH%

Humidity low alarm limit

1-2

h26*0 RH%

100 RH%

0RH%

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 RH%

h30

0RH%

Humidity sensor - Max signal

1-2

(1)

h30*h29

100 RH%

100RH%

Humidity control

0=None, 1=Humidier,

2=Dehumidier

1-3

(1)

h31*020

Humidity max. temp.

1-2

h32*h33

70.0 °C

Humidity min. temp.

1-2

h33*-5.0 °C

h32

2.0 °C

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

Delay of outputs at powerup

1-2

o01*********0 s

600 s

5 s

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, 22=Valve driver, 23=Fan alarm, 29=Door fan stop, 30=Oil recovery

1-2

(1)

o02*******0300

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,

4=User-dened

1-3

(1)

o06*********040

Max. hold time

1-2

o16*********0 min

360 min

20 min

Display air S4%

1-2

o17*********0 %

100 %

100%

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

12.0 Bar

AO1 Min. voltage

1-3

(1)

o27********

0.0 V

o28

0.0V

AO1 Max. voltage

1-3

(1)

o28********

o27

10.0 V

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Humidity control

Table 22: Humidity control

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Miscellaneous

Table 23: Miscellaneous

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

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

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, 22=Valve driver, 23=Fan alarm, 29=Door fan stop, 30=Oil recovery

1-2

(1)

o37*********0300

Light control mode

1=Day and night, 2=Network, 3=Door switch, 4=Network (Fallback), 5=Digital input

1-2

o38********15

1

MC Light signal

0=OFF, 1=ON

1-2

o39********010Rail 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

6 min

Case cleaning mode

0=OFF, 1=Fans run, 2=Cleaning

0-1

o46*********020

Application mode

1=1. Comp/Alarm/Light, 2=2. Comp/Rail/Light, 3=3. Comp/Alarm/Rail, 4=4. Alarm/Rail/Light, 5=5. Hot gas remote, 6=6. Dual with 1 evap., 7=7. Dual with 2 evap., 8=8. Cold room, 9=9. Custom

1-3

(1)

o61*********191

Access code 2

2-2

o64*********0

999

0

Make new factory

0=OFF, 1=ON

3-3

(1)

o67*********010

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

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, 22=Valve driver, 23=Fan alarm, 29=Door fan stop, 30=Oil recovery

1-2

(1)

o84*********0300

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=Display air, 2=S6 Product temp.

1-2

o97*******121

Light at Main switch OFF

0=OFF, 1=Normal ctrl.

1-2

o98********01

0

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

Alarm relay priority

0=Not used, 1=High Priority, 2=Medium priority, 3=All

1-2

P41*******032

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

0s

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. A

1-2

P86*********P87

20.0 °C

3.0 °C

Min. superheat liquid ctrl A

1-2

P87*********0.0 °C

P86

1.0 °C

Access code 1

1-1

P88*********0

999

0

Display keyboard lock

0=None, 1=Local, 2=Network

1-2

P89*********020

LLSV closing delay

1-2

P92********

0 s

300 s

5 s

AK-CC55 Single Coil and AK-CC55 Single Coil UI

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Control

Table 24: Control

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

DO2 Conguration

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/ LLSV, 9=Compressor 2, 10=Air heater

1-3

(1)

q02*0105

DO3 Conguration

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/ LLSV, 9=Compressor 2, 10=Air heater

1-3

(1)

q03*0108

DO4 Conguration

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/ LLSV, 9=Compressor 2, 10=Air heater

1-3

(1)

q04*0109

DO5 Conguration

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/ LLSV, 9=Compressor 2, 10=Air heater

1-3

(1)

q05*0103

DO6 Conguration

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/ LLSV, 9=Compressor 2, 10=Air heater

1-3

(1)

q06*0101

AO1 Conguration

0=None, 1=Rail heat PWM, 2=Valve driver

1-3

(1)

q09*********020

EEV override A

1-2

(2)

q11*********0 %

100 %

0%

Compressor 1 - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q12****010Fan - 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********010Rail 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*******010

Light - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q17********010Suction valve - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q18*010

Compressor 2 - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q19*010

Hot gas valve - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q20*010

Blinds - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q21*010

Defrost B - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q22*010

Air heater - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q23*010

Fan ECO - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q24*010

Drain valve - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q25*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

1-2

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

AK-CC55 Single Coil and AK-CC55 Single Coil UI

DO cong and manual

Table 25: DO cong and manual

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

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=Thermostat air, 2=Alarm air, 3=S3 Air ON evap., 4=S6 Product temp.

1-2

(1)

q39*********142

LLSV - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q45********010Dehumidier - override

0=MAN OFF, 1=MAN ON

1-2

(2)

q46*010

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

Control state A

0=Normal ctrl., 1=Hold after defrost, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cutout, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Powerup delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

0-X

u00*********0510

S5 Evaporator A

0-X

u09*********-200.0 °C

200.0 °C

0.0 °C

DI1 Status

0=OFF, 1=ON

0-X

u10*******010

Defrost time A

0-X

u11*********0 min

900 min

0 min

S3 Air ON evap. A

0-X

u12*********-200.0 °C

200.0 °C

0.0 °C

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

0.0 Bar

Te Evap. temp.

0-X

u26*********-200.0 °C

200.0 °C

0.0 °C

S6 product temp.

0-X

u36*******-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

Compressor 1

0=OFF, 1=ON

0-X

u58****010Fan

0=OFF, 1=ON

0-X

u59*********010

Defrost A

0=OFF, 1=ON

0-X

u60********010Rail heat

0=OFF, 1=ON

0-X

u61*****010

Alarm relay

0=OFF, 1=ON

0-X

u62*******010

Light

0=OFF, 1=ON

0-X

u63********010Suction valve

0=OFF, 1=ON

0-X

u64*010

Compressor 2

0=OFF, 1=ON

0-X

u67*010

AK-CC55 Single Coil and AK-CC55 Single Coil UI

(1)

In order to change this parameter the regulation must be stopped via the parameter r12 Main switch = OFF.

(2)

In order to change this parameter the parameter r12 Main switch must be set in position "SEr" allowing manual control of outputs.

Service

Table 26: Service

Function

Values

R-W

Code123456789Min. value

Max. value

Fact. value

S5 Evaporator B

0-X

u75********

-200.0 °C

200.0 °C

0.0 °C

S3 Air ON evap. B

0-X

u76**

-200.0 °C

200.0 °C

0.0 °C

Hot gas valve

0=OFF, 1=ON

0-X

u80*010

Blinds

0=OFF, 1=ON

0-X

u82*010

Defrost B

0=OFF, 1=ON

0-X

u83*010

Air 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

Adaptive defrost state

0=OFF, 1=Error, 2=Tuning, 3=OK, 4=Little ice, 5=Medium ice, 6=Heavy ice

0-X

U01*********060

Accumulated defrosts

0-X

U10*********0

32767

0

Accumulated skipped defrosts

0-X

U11*********0

32767

0

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

Fan ECO

0=OFF, 1=ON

0-X

U37*010

Network status

0-X

U45*********0 %

100 %

0%

Drain valve

0=OFF, 1=ON

0-X

U55*010

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

Liquid line solenoid

0=OFF, 1=ON

0-X

U95********010Dehumidier

0=OFF, 1=ON

0-X

U96*010

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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 Connect ◦ Start 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 55: AK-UI55 Bluetooth

Display info:

• Loc

• The operation is locked and cannot be operated via Bluetooth.

• Unlock from the system manager.

Figure 56: Connect to controller Figure 57: Controller dashboard Figure 58: Set-up menu

The functions are described on Page 54 – Page 69.

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. Comp/Alarm/Light, 2=2. Comp/Rail/Light, 3=3. Comp/Alarm/Rail, 4=4. Alarm/Rail/Light, 5=5. Hot gas remote, 6=6. Dual with 1 evap., 7=7. Dual with 2 evap., 8=8. Cold room, 9=9. Custom

o61

o61 Appl. mode

DO2 Conguration

Select the function of the digital output

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/LLSV, 9=Compressor 2, 10=Air heater

q02

q02 DO2 Cong.

DO3 Conguration

Select the function of the digital output

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/LLSV, 9=Compressor 2, 10=Air heater

q03

q03 DO3 Cong.

DO4 Conguration

Select the function of the digital output

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/LLSV, 9=Compressor 2, 10=Air heater

q04

q04 DO4 Cong.

DO5 Conguration

Select the function of the digital output

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/LLSV, 9=Compressor 2, 10=Air heater

q05

q05 DO5 Cong.

DO6 Conguration

Select the function of the digital output

0=None, 1=Fans, 2=Fan ECO, 3=Defrost, 4=Rail heat, 5=Alarm, 6=Light, 7=Blinds, 8=Compressor/LLSV, 9=Compressor 2, 10=Air heater

q06

q06 DO6 Cong.

AO1 Conguration

Select the function of the analogue output

0=None, 1=Rail heat PWM, 2=Valve driver

q09

q09 AO1 Cong.

AO1 Min. voltage

Minimum voltage signal of the analogue output

o27

o27 AO1 Min volt

AO1 Max. voltage

Maximum voltage signal of the analogue output

o28

o28 AO1 Max volt

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, 14=Forced closing, 15=Shutdown, 16=Light control, 20=Leak detection, 21=Adaptive liquid control, 22=Valve driver, 23=Fan alarm, 29=Door fan stop, 30=Oil recovery

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, 22=Valve driver, 23=Fan alarm, 29=Door fan stop, 30=Oil recovery

o37

o37 DI2 Cong.

AK-CC55 Single Coil and AK-CC55 Single Coil UI

AK-CC55 connect menu (SW ver. 1.7x)

Start / Stop

Table 27: Start/Stop

Conguration

Table 28: Conguration

Function

Description

Values

Code

Short name

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, 29=Door fan stop, 30=Oil recovery

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

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 1000, 1=PTC 1000, 2=NTC 5k, 3=NTC 10k,

4=User-dened

o06

o06 SensorCong

Sensor point 1 Temp.

The temperature value for the user-dened temperature sensor in the reference point

X20

--- SP1 Temp.

Sensor point 1 kohm

The resistance value in kohm for the user-dened temperature sensor in the reference point

X21

--- SP1 kohm

Sensor point 1 ohm

The resistance value in ohm for the user-dened temperature sensor in the reference point

X22

--- SP1 Ohm

Sensor point 2 Temp.

The temperature value for the user-dened temperature sensor in the reference point

X23

--- SP2 Temp.

Sensor point 2 kohm

The resistance value in kohm for the user-dened temperature sensor in the reference point

X24

--- SP2 kohm

Sensor point 2 ohm

The resistance value in ohm for the user-dened temperature sensor in the reference point

X25

--- SP2 Ohm

Sensor point 3 Temp.

The temperature value for the user-dened temperature sensor in the reference point

X26

--- SP3 Temp.

Sensor point 3 kohm

The resistance value in kohm for the user-dened temperature sensor in the reference point

X27

--- SP3 kohm

Sensor point 3 ohm

The resistance value in ohm for the user-dened temperature sensor in the reference point

X28

--- SP3 Ohm

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=Thermostat air, 2=Alarm air, 3=S3 Air ON evap., 4=S6 Product temp.

q39

q39 Food sensor Defrost method

Select method of defrost

0=None, 1=Electrical, 2=Hot gas, 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, 3=S5A and S5B

d10

d10 DefStopSens.

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Function

Description

Values

Code

Short name

Defrost stop limit A

When the selected defrost stop sensor reaches the set limit, the defrost cycle is terminated

d02

d02 Def.StopTemp 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

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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

Thermostat air temp. A

Thermostat temperature

u17

u17 Ther. air Food temperature A

Readout of food temperature

U72

U72 Food temp.

S3 Air ON evap. A

Actual sensor value

u12

u12 S3 air temp.

S3 Air ON evap. B

Actual sensor value

u76

u76 S3 airtemp B

S4 Air OFF evap. A

Actual sensor value

u16

u16 S4 air temp.

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 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

r14

r14 Therm. mode

Cut-out 1

Setpoint. The thermostat’s cut-out value when the given thermostat band is in use

r00

r00 Cutout

Cut-out 2

Setpoint. The thermostat’s cut-out value when the given thermostat band is in use

r21

r21 Cutout 2

Dierential 1

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

Dierential 2

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

r93

r93 Di Th2

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Thermostat control

Table 29: Thermostat control

Function

Description

Values

Code

Short name

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

Thermostat sensor S4 %

Selection of thermostat sensor. Here you dene the sensor that the thermostat is to use for its control function. S3, S4, or a combination of them. With the setting 0%, only S3 is used. With 100%, only S4.

r15

r15 Ther. S4 %

Thermostat sensor S4 % night

Selection of thermostat sensor S4% during night operation with night blinds. Here you dene the sensor that the thermostat is to use for its control function. S3, S4, or a combination of them. With the setting 0%, only S3 is used. With 100%, only S4.

r61

r61 Ther.S4% Ngt

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

S4 frost protection

Frost protection on S4 air temperature. If the S4 temperature sensor measure a temperature lower than the set limit, refrigeration will be stopped in order to protect products from ice formation. Refrigeration will start again when the S4 temperature has risen 2K above the set limit

r98

r98 S4 Min Lim

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 – +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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

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

High alarm limit

Readout of actual high alarm limit for the temperature monitoring

y10

--- High al. lim

Low alarm limit

Readout of actual low alarm limit for the temperature monitoring

y11

--- Low al. lim S3 Air ON evap. A

Actual sensor value

u12

u12 S3 air temp.

S3 Air ON evap. B

Actual sensor value

u76

u76 S3 airtemp B

S4 Air OFF evap. A

Actual sensor value

u16

u16 S4 air temp.

S6 product temp.

Actual sensor value

u36

u36 S6 temp.

Reset alarms

Command for resetting all alarms, unless they are still active

0=OFF, 1=ON

x15

--- Reset alarm

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Alarm limits and delays

Table 30: Alarm limits and delays

Function

Description

Values

Code

Short name

Alarm sensor S4% A

Signal to the alarm thermostat Here you have to dene the ratio between the sensors which the alarm thermostat has to use. S3, S4 or a combination of the two. With setting 0% only S3 is used. With 100% only S4 is used

A36

A36 Alarm S4 %

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 pull down 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 Alarm delay B

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

A53

A53 Al.Del.S3 B

Use product sensor S6

Select whether a separate S6 product sensor must be used for monitoring of the product temperature

0=No, 1=Yes

a01

a01 S6 function

S6 High alarm limit 1

Upper alarm limit for S6 product temperature. The limit is raised with the nightoset during night operation.

A22

A22 HighLim1 S6

S6 Low alarm limit 1

Lower alarm limit for S6 product temperature

A23

A23 LowLim1 S6

S6 High alarm limit 2

Upper alarm limit for S6 product temperature. The limit is raised with the nightoset during night operation.

A24

A24 HighLim2 S6

S6 Low alarm limit 2

Lower alarm limit for S6 product temperature

A25

A25 LowLim2 S6

S6 alarm delay

S6 temperature alarm delay. The alarm is activated if one of the relevant alarm limits is exceeded. The time delay is set in minutes. (Alarms will not activate when the setting is set to the maximum value.)

A26

A26 AL.Delay S6

S6 alarm pull down delay

Time delay on S6 (product sensor) at temperature pull down conditions (long alarm delay). This time delay is used for start-up, during defrosting, immediately after a defrost and after an appliance cleaning. A change is carried out to standard time delay when the temperature has reached below the set upper alarm limit.

A52

A52 PullD del.S6

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

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

Humidity sensor

U57

U57 RH level %

Humidier

Actual status of output function

0=OFF, 1=ON

U58

U58 Humidier

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erential

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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

Thermostat air temp. A

Thermostat temperature

u17

u17 Ther. air S3 Air ON evap. A

Actual sensor value

u12

u12 S3 air temp.

S3 Air ON evap. B

Actual sensor value

u76

u76 S3 airtemp B

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 %

Liquid line solenoid

Actual status of output function

0=OFF, 1=ON

U95

U95 LLSV

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

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Humidity control

Table 31: Humidity control

Injection control

Table 32: Injection control

Function

Description

Values

Code

Short name

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 A

Min. value for the superheat reference during adaptive liquid control

P87

P87 SH Min Liq.

Max. superheat liquid ctrl. A

Max. value for the superheat reference during adaptive liquid control

P86

P86 SH Max Liq. LLSV closing delay

Closing delay for liquid line solenoid valve

P92

P92 LLSV OFF del

Oil recovery mode

Select how oil recovery is to be handled: 0 = None 1 = Adaptive liquid control with normal fan control 2 = Adaptive liquid control with fans OFF 3 = Fixed valve opening degree with normal fan control 4 = Fixed valve opening degree with fans OFF

 WARNING:

In option 3 and 4, superheat control is omitted and it is the responsibility of the user to safeguard the compressors.

0=None, 1=ALC and Fan ctrl, 2=ALC and Fan OFF, 3=Fixed OD and Fan ctrl, 4=Fixed OD and Fan OFF

x30

--- Oil rec mode

Max oil recovery time

Maximum time for an oil recovery cycle. If an oil recovery cycle lasts longer than the set time, the oil recovery cycle will be terminated

x31

--- Oil rec max

Oil recovery OD

Fixed valve opening degree during oil recoveryWarning: Superheat control is omitted and it is the responsibility of the user to safeguard the compressors

x32

--- Oil rec OD%

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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

Defrost sensor temperature A

Actual temperature of selected defrost stop sensor

U73

U73 Def.StopTemp 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

Adaptive defrost state

Actual state of the adaptive defrost function

0=OFF, 1=Error, 2=Tuning, 3=OK, 4=Little ice, 5=Medium ice, 6=Heavy ice

U01

U01 AD state

Accumulated defrosts

Number of defrosts carried out since the initial power-up or since the resetting of the function

U10

U10 Acc.defrost

Accumulated skipped defrosts

Number of defrosts skipped since the initial power-up or since the resetting of the function

U11

U11 Acc.def.skip

Tc average temp.

Average value of the condensing temperature signal distributed via the system manager to the case controllers that are using adaptive defrost. At transcritical CO2 sites the receiver pressure is distributed to the case controllers. The function needs to be set up in the system manager.

x02

--- Tc temp. Ave

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

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Defrost control

Table 33: Defrost control

Function

Description

Values

Code

Short name

Defrost method

Select method of defrost

0=None, 1=Electrical, 2=Hot gas, 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, 3=S5A and S5B

d10

d10 DefStopSens.

Defrost stop limit 1

When the selected defrost stop sensor reaches the set limit, the defrost cycle is terminated

d02

d02 Def.StopTemp

Defrost stop limit 2

Defrost stop temperature limit when thermostat band 2 is in operation.When the selected defrost stop sensor reaches the set limit, the defrost cycle is terminated

d28

d28 DefStopTemp2 Min. defrost time

Minimum duration of a defrost cycle. The defrost cycle will as a minimum run for the set minimum defrost time once it is started

d24

d24 Min Def.time

Max. defrost time 1

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

Max. defrost time 2

Max duration of a defrost cycle when thermostat band 2 is in operation. 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.

d29

d29 MaxDefTime2

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

Hot gas injection delay

Delay before opening hot gas valve

d23

d23 HotGasInjDel

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

Drain delay

Drain delay (only in connection with hot gas). Set the time where the evaporator is emptied of condensed refrigerant after the defrost.

d17

d17 Drain delay

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Function

Description

Values

Code

Short name

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 stopped 3: 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 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

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

Rail heat during defrost

Dene how rail heat is controlled during defrost 0: Rail heat is OFF all the time 1: Rail heat is ON all the time 2: 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.

Adaptive defrost mode

Adaptive defrost is used to skip planned defrost cycles if they are not needed or in odrer to start an extra defrost when required 0: Not used 1: Monitors the evaporator and triggers an alarm in the case of icing up. 2: Scheduled defrosts during day time can be skipped. 3: Scheduled defrosts during day and night time can be skipped. 4: All schedules are carried out + extra if it is registered that this is required. (Temporary setting to 0FF will reset the recorded values.)

0=OFF, 1=Monitoring, 2=Skip day, 3=Skip day/night, 4=Full adaptive

d21

d21 AD mode

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

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Defrost schedules

Table 34: Defrost schedules

Function

Description

Values

Code

Short name

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

Function

Description

Values

Code

Short name

Compressor 1

Actual status of output function

0=OFF, 1=ON

u58

u58 Comp1/LLSV

Compressor 2

Actual status of output function

0=OFF, 1=ON

u67

u67 Comp2 relay

Min ON time

Minimum time the compressor is to run once it has been started.

c01

c01 Min. On time Min OFF time

Minimum time the compressor has to be stopped

c02

c02 Min.O time

Step control mode

Selection of step control mode for compressors. At sequential mode compressor 1 will always be the rst to start and the last to stop. In cyclic mode the run time between the compressor will be equalized.

1=Sequential, 2=Cyclic

c08

c08 Step mode

Delay between comp.

Time delay for couplings of two compressors. The step delay is the time that has to elapse from the rst compressor cuts in and until the next compressor can cut in.

c05

c05 Step delay

Comp. 2 ctrl. Th. band 2

Select whether compressor 2 is to be in operation in thermostat band 2

0=OFF, 1=ON

c85

c85 Cmp2 In Th2

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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

Fan

Actual status of output function

0=OFF, 1=ON

u59

u59 Fan relay

Fan ECO

Actual status of output function

0=OFF, 1=ON

U37

U37 Fan Eco

Fan pulsing mode

Pulse operation of fan 0: No pulse operation 1: Pulse operation when the thermostat is cut out 2: 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 OFF 1: Fans are ON 2: Fans are OFF and defrost is not permitted 3: 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 Single Coil and AK-CC55 Single Coil UI

Compressor

Table 35: Compressor

Fan control

Table 36: Fan control

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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

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

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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

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

Blinds

Actual status of output function

0=OFF, 1=ON

u82

u82 Blinds relay

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Railheat control

Table 37: Railheat control

Light/Blinds/Cleaning control

Table 38: Light/Blinds/Cleaning control

Function

Description

Values

Code

Short name

Light control mode

Conguration of light function 1: 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

Blinds max. open time

Time delay from when blinds have been opened manually until they close again

P60

P60 BlindOpenTim

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

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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

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=Display air, 2=S6 Product temp.

o97

o97 Displ. Ctrl.

Display air S4%

Signal to the display sensor. Here you have to

dene

the ratio between the sensors which the display has to use. S3, S4 or a combination of the two. With setting 0% only S3 is used. With 100% only S4 is used

o17

o17 Disp. S4 %

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 keyboard lock

With this setting it is possible to lock the keyboard operation of the local display. None: Display keyboard operation will never be locked. Local: When not used for some time, the local display will lock the keyboard operations and a special key combination is required in order to enable the keyboard operations. Network: When the controller receives a master control signal (--- Key/BT lock) via the network, the display keyboard operations will be locked. The keyboard operations can only be activated again by setting the master control signal OFF via the System Manager.

0=None, 1=Local, 2=Network

P89

P89 LockDispKey

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Display control

Table 39: Display control

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 used 1: High. Alarm with high priority will activate relay 2: Medium. Alarms with high or medium priority will activate the alarm relay 3: 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

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

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Alarm relay priorities

Table 40: Alarm relay priorities

Miscellaneous

Table 41: Miscellaneous → Access codes

Table 42: Miscellaneous → Network

Function

Description

Values

Code

Short name

S2 Gas outlet A - Adjustment

Correction of sensor signal e.g. due to long sensor cable

r19

r19 Adjust S2

S3 Air ON evap. A Adjustment

Correction of sensor signal e.g. due to long sensor cable

r10

r10 Adjust S3

S4 Air OFF evap. A Adjustment

Correction of sensor signal e.g. due to long sensor cable

r09

r09 Adjust S4

S3 Air ON evap. B Adjustment

Correction of sensor signal e.g. due to long sensor cable

r53

r53 Adjust S3 B

S5 Evaporator A Adjustment

Correction of sensor signal e.g. due to long sensor cable

r11

r11 Adjust S5

S6 product temp. Adjustment

Correction of sensor signal e.g. due to long sensor cable

r59

r59 Adjust S6

Function

Description

Values

Code

Short name

Reset to factory settings

Command which will revert all controller settings to factory values.

0=OFF, 1=ON

z06

--- Reset factory

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

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

S2 stabillity A

Setting required stability of S2 gas outlet temperature before the superheat reference is reduced (Expert setting)A higher value will allow more instabillity in S2 signalA lower value will allow less instabillity in S2 signal

Y33

--- S2 Stability

S2 Std deviation

Expert readout - contact Danfoss for further information

Y34

--- S2 Std dev

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 control (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

SH Band

Expert injection setting - contact Danfoss for further information

Y28

--- SH band

Ther. duty cycle SP

Expert setting - contact Danfoss for further information

Y29

--- ThDutyCycle

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Table 43: Miscellaneous → Sensor adjustment

Table 44: Miscellaneous → Factory reset

Advanced

Table 45: Advanced → Advanced injection control

Function

Description

Values

Code

Short name

Ther. duty cycle

Expert setting - contact Danfoss for further information

Y30

--- ActDutyCycle

P-gain

Expert injection setting - contact Danfoss for further information

Y31

--- P-gain

OD Ctrl. status

Readout showing which part of the injection function that is in control of the valve opening degree

Values must be changed as per below: 0=Adaptive SH control 1=MOP 2=Superheat close 3=MTR

Y32

--- OD status

Function

Description

Values

Code

Short name

AD sensibility

Expert setting - contact Danfoss for further information

Z06

--- AD sense

Flash gas sense

Expert setting - contact Danfoss for further information

x89

--- FlashGasSens

Air tuning value

Expert setting - contact Danfoss for further information

x90

--- AD AirTuning

New air tuning value

Expert readout - contact Danfoss for further information

x92

--- NewAirTunVal

Little ice indicator

Expert readout - contact Danfoss for further information

Y04

--- FaultIndic.0

Medium ice indicator

Expert readout - contact Danfoss for further information

x91

--- FaultIndic.1

Heavy ice indicator

Expert readout - contact Danfoss for further information

Y05

--- FaultIndic.2

Flash gas indicator

Expert readout - contact Danfoss for further information

x93

--- Fl.Gas.Indic

AD int. state

Expert readout - contact Danfoss for further information

Y11

--- ADintState

Time constant Lpf

Expert setting - contact Danfoss for further information

Y19

--- TimeConstLpf DefrostOut

Y24

DefrostOut

AirTuneValR

Y26

AirTuneValR

IceLevel

Y27

IceLevel

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, 2=Min ON timer, 3=Min OFF timer, 4=Drip o, 10=Main switch OFF, 11=Thermostat cut-out, 12=Frost protection S4, 14=Defrost, 15=Fan delay, 16=Forced closing, 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, 29=Case cleaning, 30=Forced cooling, 31=Door open, 32=Power-up delay, 33=Air heating, 45=Shut down controller, 48=Adaptive liquid control, 51=Oil recovery

u00

u00 Ctrl. state

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.

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

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Table 46: Advanced → Advanced adaptive defrost control

Table 47: Advanced → Master control

Function

Description

Values

Code

Short name

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 Request next defrost

Master control signal used by system manager to see if a controller is requesting that the next defrost has to be carried out

0=No, 1=Yes

x94

--- AD def.req. 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 Tc temp. mean

Master control signal distributing the condensing temperature signal to the case controllers that are using adaptive defrost. At transcritical CO2 sites the receiver pressure is distributed to the case controllers. This function needs to be set up in the system manager.

x04

--- TcTempMean

MC Po load factor

x83

--- Load factor

MC Key/Bluetooth lock

Master control signal that will lock down all Bluetooth data communication and optionally also the operation of the display keys (depends on selection in P89 Display keyboard lock)

0=OFF, 1=ON

x33

--- Key/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 MC Oil recovery

Master control signal for starting and stopping a oil recovery cycle

0=OFF, 1=ON

x29

--- Oil recov.

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

E25

S3 Air ON evap. 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

E28

S6 product temp. A - Sensor error

Sensor signal is out of range. Please check the sensor for correct operation

E34

S3 Air ON evap. B - 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

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.

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.

AK-CC55 Single Coil and AK-CC55 Single Coil UI

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 40: Alarm relay priorities.) Here are the messages that may appear:

Table 48: Fault message

Code

Alarm text

Description

A11

Refrigerant not selected

The refrigerant has not been selected hence control can not be initiated

A13

S6 high product temperature A

The S6 Product temperature has been above the max alarm limit for a longer time period than the set alarm delay.

A14

S6 low product temperature A

The S6 Product temperature has been below the min alarm limit for a longer time period than the set alarm delay.

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

a04

Wrong IO conguration

Inputs and outputs have not been congured correctly

X02

Evaporator is icing up

The adaptive defrost function has detected heavy ice formation on evaporator.

X03

Flash gas detected

The adaptive defrost function has detected heavy ash gas in front of injection valve

Z01

Max defrost time exceeded A

The last defrost cycle has stopped on time instead of set temperature

A34

Fan alarm

Alarm from digital input monitoring function

A43

Valve driver alarm

Alarm from digital input monitoring function

AK-CC55 Single Coil and AK-CC55 Single Coil UI

 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".

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

S2

Min ON timer

The compressor is restricted from stopping until the minimum ON timer expires

S3

Min OFF timer

The compressor is restricted from starting until the minimum OFF timer expires

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

S12

Frost protection S4

The air o temperature is below the minimum S4 frost limit (r98, S4 frost protection)

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, S3 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

S50

Oil recovery

The controller is running an oil recovery sequence

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Operating status

Table 49: Operating status

(1)

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 S3 or S4 sensor fails, the thermostat will operate with a registered ON/OFF duty cycle during day and night operation.

Electrical data

Value

Supply voltage AC [V]

115 V / 230 V, 50/60 Hz

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, S6

Pt 1000 AKS11

Sensor S3, S4, S5

Pt 1000 AKS11 PTC 1000 EKS111 NTC5K EKS211 NTC10K EKS221 sensor

(All 3 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 (SELV) Contact 3.5 mA

Digital input

DI3

115 V / 230 V AC

Solid state output

DO1 (for AKV coil)

115V / 230 V AC Max. 0.5 A 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 DO3 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 Single Coil and AK-CC55 Single Coil UI

Product specication

Technical data

Electrical specications

Table 50: Electrical specications

Sensor and measuring data

Table 51: Sensor and measuring data

Input and output relay specications

Table 52: Input and output relay specications

Danfoss

84B3240

113

180 60

Danfoss

84B3241

Danfoss

84B3242

Danfoss

84B3245

Function data

Value

Display

LED 3 digit

External display, AK-CC55 Single Coil UI

1 external display

External display, AK-CC55 Single 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 (Not AK-CC55 Compact)

Clock battery backup power reserve

4 days

Mounting

DIN rail

Environmental conditions

Value

Ambient temperature range, transport [°C]

0 – 55 °C

Ambient temperature range, storage [°C]

-40 – 70 °C

Enclosure rating IP

IP20

Relative humidity range [%]

20 – 80%, non-condensing

Shocks/Vibrations

No shocks and vibrations allowed

AK-CC55 Single Coil and AK-CC55 Single Coil UI

NOTE:



• DO2 to 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 53: Function data

Environmental conditions

Table 54: Environmental conditions

Dimensions

Measurements are in mm.

Figure 59: AK-CC55 Single Coil

Figure 61: AK-UI55 Set

Figure 60: AK-CC55 Single Coil UI

Figure 62: AK-OB55

Type

Symbol

Function

Code no.

AK-CC55 Single Coil

Case controller for one AKV valve

084B4082

AK-CC55 Single Coil UI

Case controller for one AKV valve Integrated display with control buttons

084B4083

AK-UI55 Info

External display

084B4077

AK-UI55 Bluetooth

External display with Bluetooth operation

084B4075

AK-UI55 Set

External display with control buttons

084B4076

AK-UI55 Mounting Base

Danfoss

80G8236

Mounting kit for display types: AK-UI55 Set, AK-UI55 Bluetooth, AK-UI55 Info

084B4099

AK-UI cable

External display cable with RJ12 connector. 3 m

084B4078

AK-UI cable

External display cable with RJ12 connector. 6 m

084B4079

AK-OB55 Lon

Data communication module Lon Can be mounted in Single Coil and Multi Coil versions

084B4070

MMIMYK

Danfoss

80G8284

Gateway between AK-CC55 and PC installed with KoolProg software

080G0073

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Ordering

The list contains the components that make up an AK-CC55 Single Coil setup. For other Danfoss products mentioned in the document, such as sensors and valves, refer to relevant product documentation.

Table 55: Ordering

Control

Certication

Mark

Country

Single Coil / Single Coil UI

EMC/LVD/RoHS

CEEUSingle Coil/Single Coil UI

UL recognized

cURus

NAM (US and Canada)

Single Coil / Single Coil UI

ACMA (EMC)

RCM

Australia/New Zealand

Single Coil / Single Coil UI

LVE/EMC/RoHS

EAC

Russia, Kazakhstan, belarus

Single Coil / Single Coil UI

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 Bluetooth

ANATEL

ANATEL ID

Brazil

AK-UI55 Bluetooth

SUBTEL

N/A

Chile

AK-UI55 Bluetooth

RoHS

EAC

Russia, Kazakhstan, Belarus

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 Single Coil and AK-CC55 Single Coil UI

Certicates, declar

ations, 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 56: Controller

Table 57: Display module

Table 58: Option module

Controllers/displays/option module:

CB certificate including all deviation according to IEC 60730-1 and 2-9

Relays:

T

ested according to IEC 60079-15

AK-CC55 Single Coil and AK-CC55 Single Coil UI

Statements for the AK-UI55 Bluetooth display

FCC COMPLIANCE STATEMENT

 CAUTION:

Changes or 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.

modications not expressly approved could void your authority to use this equipment This device

Online support

Play Store

App Store

oss oers a wide range of support along with our products, including digital product information, software,

Danf mobile apps, and expert guidance. See the possibilities below.

The Danfoss Product Store

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.

Get local information and support

Local Danfoss websites are the main sources for help and information about our company and products. Find product availability, get the latest regional news, or connect with a nearby expert—all in your own language.

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 AK-CC55 Single Coil, AK-CC55 Single Coil UI User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Introduction

Portfolio overview

Function overview

Connectivity

Data communication

AK-CC55 Single Coil and Single Coil UI

External display

Controller functionality

Functions

Injection control

Adaptive superheat control

Adaptive liquid control

Liquid injection by use of stepper valve

Oil recovery

Adaptive liquid control (option 1 and 2)

Fixed opening degree (option 3 and 4)

Safety

Temperature control

Food temperature sensor

Temperature monitoring

Thermostat bands

Night setback of thermostat value

Temperature sensor types

Appliance cleaning

Appliance shutdown

Defrost control

Electrical defrosting

Hot gas defrosting

Natural defrost

Start of defrost

Stop of defrost

Defrost sequence

Real-time clock

Coordinated defrost

Adaptive defrosting

Melt function

Control of two compressors (only with custom set-up)

Rail heat

Light function

Night blind

Humidity control

Heating function (only with custom set-up)

Digital inputs

Forced closing

Door contact

Display

Override

Applications

AK-CC55 connections and application options

Application set-ups and IO connections

AK-CC55 Single Coil connections

Data communication

AKV info

External solid state relay for rail heat

AKS 32R info

Coordinated defrost via cable connections

External display AK-UI55

Connections

Replacing AK-CC 550 with AK-CC55

Operation

Operation via data communication

Direct operation

Operation via AK-UI55 Set

Parameter groups when operating via display

Get a good start

AK-UI55 display menu (SW ver. 1.7x)

Thermostat

Alarm settings

Compressor

Defrost

Defrost schedule

Injection control

Fan control

Humidity control

Miscellaneous