Danfoss AK-CC 550 User guide

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User Guide

Controller for appliance control

AK-CC 550

ADAP-KOOL® Refrigeration control systems

Contents

Introduction ....................................................................................................... 2

Operation ............................................................................................................ 4

Applications .....................................................................................................12

Survey of functions ........................................................................................ 15

Introduction

Application

Complete refrigeration appliance control with great exibility to adapt to all types of refrigeration appliances and cold storage rooms.

Advantages

• Energy optimisation of the whole refrigeration appliance

• One controller for several dierent refrigeration appliances

• Integrated display at the front of the controller

• Quick set-up with predened settings

• Built-in data communication

• Built-in clock function with power reserve

Principle

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 to register the temperature near the required product in a certain place within the appliance. The temperature of the evaporator is registered with the S5 sensor which can be used as a defrosting sensor. In addition to the outlet to the electronic injection valve of the type AKV, the controller has 5 relay outputs which are dened by the use selected – the individual usage options are described in detail on page 12.

Operation .......................................................................................................... 26

Menu survey .....................................................................................................28

Connections ..................................................................................................... 32

Data ..................................................................................................................... 34

Ordering ............................................................................................................35

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 defrosting based on evaporator performance

• Start of defrost via schedule, digital input or network

• Natural, electric or hot gas defrost

• Stop of defrost on time and/or temperature

• Coordination of defrosting among several controls

• Pulsing of fans when thermostat is satised

• Case cleaning function for documentation of HACCP procedure

• Rail heat control via day/night load or dew point

• Door function

• Control of two compressors

• Control of night blinds

• Light control

• Heat thermostat

• Factory calibration that will guarantee a better measuring accu-

racy than stated in the standard EN 441-13 without subsequent calibration (Pt 1000 ohm sensor)

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

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Appliance examples

Applications

Here is an overview of the controller’s usage options. A setting will congure input and outputs so that the controller’s operation interface is directed at the selected application. The current settings for the respective uses can be found on page

28.

Application 1-8

These uses are applied to standard appliances or cold storage rooms with one valve, one evaporator and one refrigeration section. The sensors are used according to standard principles. The output functions change depending on the selected application.

Application 9

This use is for refrigeration appliances with one valve, two evaporators and two refrigeration sections. Here the temperature and alarm monitoring are always controlled using the S4 sensor. The S3 sensor is used for display readings. The product sensor is replaced by an extra defrosting sensor S5B for the second evaporator.

Application 10

This use is for refrigeration appliances with one valve, one evaporator and two refrigeration sections. Here temperature is always controlled using the S4 temperature. The S6 sensor is placed in the S3B position. The S3B sensor uses alarm limits, etc which are normally used for the S6 sensor. The two S3 temperatures are used for alarm monitoring and display readings for each refrigeration section. There are separate alarm limits for each refrigeration section.

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Operation

Liquid injection

Liquid injection in the evaporator is controlled by an electronic injection valve of the type AKV. The valve functions as both expansion valve and solenoid valve. The valve opens and closes using signals from the controller. The function contains an adaptive algorithm which independently adjusts the valve’s opening so that the evaporator constantly supplies optimum refrigeration.

Superheat can be measured via one of the two following principles:

• Pressure sensor P0 and temperature sensor S2 For this use 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 used by several controllers, but only if there is no signicant pressure dierence between the evaporators in question.

• Two temperature sensors S1 and S2 Use of the S1 sensor means that location is particularly important. The sensor must be located so as to read the evaporating temperature during injection without the presence of too much pressure drop. Danfoss recommends that the S1 sensor be located on the rst pipe bend on the evaporator.

Placement of the S1 sensor is crucial for a safety signal and with this a satisfactory control.

Temperature control

The actual temperature control can take place in two ways: as an ordinary ON/OFF regulation with a dierential, or as a modulating control there the temperature variation will not be nearly as great as in ON/OFF control. There is however a limit to the use of a modulating control as it can only be used in central plant. In a decentralised plant the thermostat function with ON/OFF control should be selected. In a central plant the thermostat function may either be selected for ON/OFF control or modulating control.

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 alarms. This time delay is applicable during defrosting, appliance cleaning and start-up.

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Thermostat bands

Thermostat bands can be used benecially for appliances where dierent product types are stored which require 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.

Night setback of thermostat value

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

• via an external switch signal.

• via a signal from the data communication system.

Product sensor

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

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 signal – as a rule via a key switch placed on the appliance. 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.

Alarm monitoring There are no temperature alarms during appliance cleaning.

- + + °C

1 ÷ + Fan

2 ÷ ÷ O

3 + + °C

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Defrost

Depending on the application you may choose between the following defrost methods: Natural: Here the fans are kept operating during the defrost Electric: The heating element is activated Hotgas: Here the solenoid valves are controlled so that the hotgas can ow through the evaporator

Defrost sequence

1) Pump down

2) Defrost

3) Waiting position after defrost

4) Draining (drain delay. Hotgas only)

5) Drip o

6) Delay of fan

Hot gas defrost (application 6 only)

This type of connection can be used on systems with hotgas defrost, but only in small systems in, say, supermarkets – the functional content has not been adapted to systems with large charges Relay 2 is used for suction valve Relay 4’s change-over function can be used by the bypass valve and/or the hotgas valve. Must not be used together with PMLX and GPLX valves, unless a time delay relay is installed, which ensures that the PMLX/GPLX valve is closed completely before the hotgas is turned on.

Hot gas application

Drip tray heating element

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

Start of defrost

A defrost can be started in dierent ways Interval: Defrost is started at xed time intervals, say, 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.

Refrigeration time: Defrost is started at xed refrigeration time

intervals, in other words, a low need for refrigeration will ”postpone” the defrost

Schedule: Here defrost can be started at xed times of the

day and night. However, max. 6 times Contact: Defrost is started with a contact signal on a digital input Network: The signal for defrost is received from a system unit via the data communication Adaptive defrost: Here defrosting is started based on intelligent

registering of evaporator performance. Manual: An extra defrost can be activated from the controller’s

lower-most button All the mentioned methods can be used at random – if just of them is activated a defrost will be started.

Stop of defrost

Defrosting can be stopped by either:

• Time

• Temperature (with time as safety).

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Coordinated defrost

There are two ways in which coordinated defrost can be arranged. Either with wire connections between the controllers or via data communication

Wire connections The digital input DI2 is connected between the current 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 unit handles the coordination. The controllers are gathered in defrosting groups and the system unit 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 unit 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.

Max. 10

System manager

Defrost on demand

1 Based on refrigeration time

When the aggregate refrigeration time has passed a xed time, a defrost will be started.

2 Adaptive defrosting based on monitoring of evaporator per-

formance

This function is based on a registration of the air ow through

the evaporator. By using the AKV valve as mass owmeter for the

refrigerant ow it is possible to compare the energy input on the

refrigerant side with the energy output on the air side. Via this

comparison the air ow through the evaporator can be deter-

mined and hence also the amount of ice/frost build-up on the

evaporator surface. If the ice/frost build-up reduces the capac-

ity of the evaporator the function will carry out an additional

defrost.

Enter in the weekly defrost schedule the number of defrosts corresponding to the basic load. If the load of the evaporator is increased beyond this, defrost on demand will add the required additional defrosts. The function requires the following connections:

- Expansion valve type AKV

- Temperature signal from both S3 and S4

- Temperature signal from the condensing pressure Tc which is to be distributed via the network from the system manager. If the controller can not load the Tc signal, the measurement is replaced by a constant.

NOTE. The S3 and S4 sensors must be placed in the air ow/channel immediately before/after the evaporator. Min. time between defrosts

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

Reset If the adaptive defrost function registers problems with the defrost, it will show an error message and the function will no longer carry out extra defrosts. In this event a manual reset of the function via d22 should be carried out. When the reset function is activated it will start a defrost so that the subsequent tuning will take place on an evaporator with no ice/frost build-up.

Note The function "Adaptive defrost” should only be activated when the evaporator runs under normal operational conditions.

Melting function

This function will stop 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

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 hours. If the controller is equipped with data communication, the clock

will automatically be updated from the system unit. 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.

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Control of two compressors

The two compressors must be of the same size. 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 cutout 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 compressors’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, the ”Min On time” will be disregarded.

Railheat

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

Pulse control according to day and night

Various ON periods can be set for day and night operation. A period time is set as well as the percentage part of the period in which the rail heat is ON.

Pulse control according to dew point

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

During defrosting

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

Rail heat

Dew point

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Fan

Pulse control

To obtain energy savings it is possible to pulse control the power supply to the fans at the evaporators. Pulse control can be accomplished in one of the following ways:

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

- during night operation and during the thermostat’s cutout pe-

riod (appliance with night lid)

(This function is not present when r14 = 2, i.e. modulating regula-

tion.)

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

Cutout 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 power supply from large fans. In order to prevent this situation the controller can stop the fans if the temperature at S5 exceeds a set limit value.

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 three ways:

- the light is controlled via a signal from a door contact. Together

with this function a time delay can be set so that the light is kept on for a period of time after the door has been closed.

- the light is controlled via the day/night function

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

unit. Here there are two operational options if data communication should fail:

- The light can go ON

- The light can stay in its current mode.

The light load must be connected to the NC switch on the relay. This ensures that the light remains on in the appliance if power to the controller should fail. The light is switched o when "r12" (Main switch) is set to o (see o98). The light is switched o when the appliance cleaning function is activated.

Night blind

Motorised night blind can be controlled automatically from the controller. The night blinds will follow the status of the light function. When the light is switched on, the night blinds opens and when the light is switched 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 input is activated, the night blinds will open and the refrigeration appliance can be lled with new products. If the input is activated again, the blinds close again. When the night blind function is used, the thermostat function can control with 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 open when the appliance cleaning function is activated. A setting can dene that the night blind is open when "r12" (Main switch) is set to o (see o98).

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Digital inputs

There are two digital inputs DI1 and DI2 with contact function and one digital input DI3 with high voltage signal. They can be used for the following functions:

- Retransmission of contacts position via data communication

- Door contact function with alarm

- Starting a defrost

- Main switch - start/stop of cooling

- Night setback

- Thermostat bands switch

- General alarm monitoring

- Case cleaning

- Forced cooling

- Override of night blinds

- Coordinated defrost (DI2 only)

- Forced closing of valve (DI 3 only)

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. (However not at low pressure – LP). If a defrost cycle is in progress, the forced closing status will not be re-established until the defrost is completed. The signal can be received from the DI3-input or via the data communication. During a forced closing the fans can be dened to be stopped or in operation.

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 switch 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.

Heating function

The heating function is used to prevent the temperature becoming too low, e.g. in a cutting room, etc. The limit for when the heating function cuts o is set as an oset value under the current cutout 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.

Refrigeration

Neutral zone

Heat

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Data communication

The controller has xed built-in MODBUS data communication.

If there is a requirement for a dierent form of data communication, a Lon RS 485 or DANBUSS module can be inserted in the controller. The connection must then be to terminal RS 485.

(To use a Lon RS 485 module and gateway type AKA 245 the module must be Version 6.20 or higher.)

Display

The controller has one plug for a display. Here display type EKA 163B or EKA 164B (max. length 15m) can be connected. EKA 163B is a display for readings. EKA 164B is both for readings and operation. The connection between display and controller may be with a cable which has a plug at both ends.

If the distance between display and controller is greater than 15

Address o03 > 0

m, the connection must take another form. An extra module must also be mounted in the controller if data communication is used. The built-in MODBUS data communication is used so that the display connection and the data communication to the other controllers must take place via a module. The module can be: Lon RS 485, DANBUSS or MODBUS. When a display is to be connected to the built-in MODBUS, the display can advantageously be changed to one of the same type, but with Index A (version with screw terminals). The controllers address must be set higher than 0 in order for the display to be able to communicate with the controller. If connection of two displays is required, one must be connected to the plug (max. 15 m) and the other must then be connected to the xed data communication.

Important

All connections to the data communication MODBUS, DANBUSS and RS 485 must comply with the requirements for data communication cables. See literature: RC8AC.

Override

The controller contains a number of functions which can be used together with the override function in the master gateway/system manager.

Function via data communication Function in gateway/system manager Used parameters in AK-CC 550

Start of defrosting Defrost control / Time schedule / Defrost group --- Def start

Coordinated defrost Defrost control / Defrost group --- HoldAfterDef / - - - DefrostState

Prevent defrost start --- Disable Def

Day/Night schedule Day/Night control / Time schedule / Light zone --- Night setback

Light control Day/Night control / Time schedule O39 light Remote

Forced closing Forced Close / Injection ON / AKC ON --- Forced cl.

Forced cooling --- Forced cool

Railheat link to dew point / Enhanced railheat --- Dew point

P0 optimization P0 Optimization The controller supports P0 optimization

Adaptive defrost / Adaptive defrost. System manager only - - - Tc TempMean

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Applications

Here is a survey of the controller’s eld of application.

A setting will dene the relay outputs so that the controller’s interface will be targeted to the chosen application.

On page 20 you can see the relevant settings for the respective wiring diagrams.

S3 and S4 are temperature sensors. The application will determine whether either one or the other or both sensors are to be used. S3 is placed in the air ow before the evaporator. S4 after the evaporator. A percentage setting will determine how the control is to be based. S5 is a defrost sensor and is placed on/in the ns of the evaporator. S6 is a product sensor, but in application 9 and 10 it has a dierent use. DI1, DI2 and DI3 are contact functions that can be used for one of the following functions: door function, alarm function, defrost start, external main switch, night operation, change of thermostat reference, appliance cleaning, forced refrigeration or coordinated defrost. DI3 has a 230 V input. See the functions in settings o02, o37and o84.

General: The ten uses are all adapted for commercial refrigeration systems in the form of either refrigeration appliances or cold storage rooms. In general all have outputs for:

• AKV valve

• Fan

• Defrost

In addition they have dierent uses and thereby input and outputs.

Application 1-4

Standard applications. This is for standard use where the vital dierence is only dierent combinations of the following functions/outputs:

• Alarm

• Rail heat

• Compressor

• Light

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The following uses have some special functions which in brief are:

Application 5 ”Two-compressor” operation. The two compressors must be of the same size. On start-up (after defrosting, operational stop, etc.) both compressors are started with a set time shift. One compressor starts at half the dierential so that an optimum adaptation of compressor capacity takes place for the current load in the appliance/room. There is automatic runtime equalisation between the compressors. For a more detailed description please refer to earlier sections in the manual.

Application 6

Hot gas defrosting. Hot gas defrosting is adapted to commercial appliances/rooms with limited system lling. One relay controls the main valve in the suction line. A changeover relay controls both the hot gas valve and the drain valve. This means that there is no time delay between stops of hot gas and start of draining.

Application 7

Control of night blinds Night blinds follow the status of the light function – when the light is switched on, the night blinds are up and when the light is switched o, the night blinds are down. In addition a digital input provides the option of forced opening of the blinds so that the appliance can be lled with products.

Application 8 Heat thermostat The heat thermostat is typically used if the temperature is to be controlled within narrower limits, e.g. for cutting rooms, etc. The heating thermostat can be set as a dierence in relation to the cutout limit for the refrigeration thermostat so that simultaneous refrigeration and heating are avoided.

Application 9 Two refrigeration sections – two defrost outputs This application is for refrigeration appliances with one valve, two evaporators and two refrigeration sections. The temperature is controlled and is always alarm monitored according to the S4 temperature. For this the product sensor is used as a defrosting stop sensor for evaporator no. 2.

Application 10

Two refrigeration sections – individual alarm/ display via S3 This application is for refrigeration appliances with one valve, one evaporator and two refrigeration sections. The temperature is always controlled according to the S4 temperature. The product sensor is used as an extra S3 sensor for section no. 2. Alarm monitoring and display readings take place individually via the "S3" sensors in each refrigeration section.

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Connection signs

The controller is provided with signs from the factory indicating application 1. If you employ another use, signs are provided so that you can mount the relevant one. It is only the lower sign that needs to be mounted.

The number is indicated on the left-hand side of the signs. Use the sign with the current application number. One of the signs applies to both applications 4 and 10.

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Survey of functions

Function Para-

meter

Normal display

Normally the temperature value from one of the two thermostat sensors S3 or S4 or a mixture of the two measurements is displayed. In o17 the ratio is determined.

Thermostat Thermostat control Set point

Regulation is based on the set value plus a displacement, if applicable. The value is set via a push on the centre button. The set value can be locked or limited to a range with the settings in r02 and r 03. The reference at any time can be seen in "u91 Cutout temp".

Dierential

When the temperature is higher than the reference + the set dierential, the compressor relay will be cut in. It will cut out again when the temperature comes down to the set reference.

Ref. Dif.

Setpoint limitation

The controller’s setting range for the setpoint may be narrowed down, so that much too high or much 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.

To avoid a too low setting of the setpoint, the min. allowable reference value may be increased.

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.

Temperature unit

Set here if the controller is to show temperature values in °C or in °F.

Correction of signal from S4

Compensation possibility due to long sensor cable

Correction of signal from S3

Compensation possibility due to long sensor cable

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 AKV outlet and the relay outlets can be force-controlled by the respective reading parameters (u23, u58, etc.). Here the read value can be overwritten.) Start / stop of refrigeration can also be accomplished with the external switch function connected to a DI input. Stopped refrigeration will give a ”Standby alarm”.

Night setback value

The thermostat’s reference will be the setpoint plus this value when the controller changes over to night operation. (Select a negative value if there is to be cold accumulation.)

Thermostat function

Here it is dened how the thermostat is to operate. Either as an ordinary ON/OFF thermostat or as a modulating thermostat. 1: ON/OFF thermostat 2: Modulating When operation is ”modulating” the AKV valve will limit the ow of refrigerant so that the temperature variation will be less than for the ON/OFF thermostat. The dierential (r01) must not be set lower than 2K for "modulating". In a decentralised plant you must select the ON/OFF thermostat setting.

Selection of thermostat sensor

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

Melt function

Only for control of refrigeration (-5 to +10°C). The function ensures that the evaporator will not be blocked by frost. Here you set how often the function is to stop the refrigeration and hence transform the frost to water (or ice if there is too much frost).

Melt period

Here you set how long an on-going melt function is to last.

Parameter by operation via data communication

Display air (u56)

Cutout °C

r01 Dierential

r02 Max cutout °C

r03 Min cutout °C

r04 Disp. Adj. K

r05 Temp. unit

°C=0. / °F=1 (Only °C on AKM, whatever the setting)

r09 Adjust S4

r10 Adjust S3

r12 Main Switch

1: Start 0: Stop

-1: Manual control of outputs allowed

r13 Night oset

r14 Therm. mode

r15 Ther. S4 %

r16 MeltInterval

r17 Melt period

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Set point 2 The thermostat’s cutout value when the thermostat band 2 is activated via a digital input.

Correction of signal from S6

Compensation possibility due to long sensor cable

Selection of thermostat sensor S4% during night operation with night blinds

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

Heat function

Set the size of the Neutral Zone for changeover from cooling to heating Time delay on transition from refrigeration phase to heating phase.

(there is not time delay on transition from heating phase to refrigeration phase).

Alarm Alarm settings

The controller can give alarm in dierent situations. When there is an alarm all the light-emitting diodes (LED) will ash on the controller front panel, and the alarm relay will cut in.

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.

Time delay for door alarm

The time delay is set in minutes. The function is dened in o02 , o37 or in o84. Time delay for cooling (long alarm delay) This time delay is used during start-up, during defrost and after appliance cleaning. There will be change-over to the normal time delay (A03) when the temperature has dropped below the set upper alarm limit. The time delay is set in minutes.

Upper alarm limit

Here you set when the alarm for high temperature is to start. The limit value is set in °C (absolute value). The limit value will be raised during night operation. The value is the same as the one set for night setback, but will only be raised if the value is positive.

Lower alarm limit

Here you set when the alarm for low temperature is to start. The limit value is set in °C (absolute value).

Upper alarm limit for thermostat 2 (Thermostat band 2)

(Same function as for thermostat 1)

Lower alarm limit for thermostat 2 (Thermostat band 2)

(Same function as for thermostat 1)

Upper alarm limit for S6 temperature at thermostat 1 A22 HighLim1 S6 Lower alarm limit for S6 temperature at thermostat 1 A23 LowLim1 S6 Upper alarm limit for S6 temperature at thermostat 2 (Thermostat band 2) A24 HighLim2 S6 Lower alarm limit for S6 temperature at thermostat 2 (Thermostat band 2) A25 LowLim2 S6 S6 temperature alarm delay

The alarm is activated if one of the relevant alarm limits A22, A23, A24 or A25 is exceeded. The time delay is set in minutes. (Alarms will not activate when the setting is set to the maximum value.)

Delay of a DI1 alarm

A cut-out/cut-in input will result in alarm when the time delay has been passed. The function is dened in o02. Delay of a DI2 alarm A cut-out/cut-in input will result in alarm when the time delay has been passed. The function is dened in o37 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 Time delay on S6 (product sensor) for pull-down (long alarm delay) This time delay is used for start-up, during defrosting, immediately after a defrost and after an appliance clean. A change is carried out to standard time delay (A26) when the temperature has reached below the set upper alarm limit. The time delay is set in minutes.

r21 Cutout2 temp

r59 Adjust S6

r61 Ther.S4% Ngt

r62 Heat NZ

r63 HeatStartDel

Night setbck (start of night signal. 0=Day, 1=Night) Forced cool. (start of forced cooling) Forced close (Forced stop of cooling)

With data communication the importance of the individual alarms can be dened. Setting is carried out in the “Alarm destinations” menu via AKM.

A03 Alarm delay

A04 DoorOpen del

A12 Pulldown del

A13 HighLim Air

A14 LowLim Air

A20 HighLim2 Air

A21 LowLim2 Air

A26 Al. Delay S6

A27 AI.Delay DI1

A28 AI.Delay DI2

A36 Alarm S4%

A52 PullD del.S6

Reset alarm Ctrl. Error (EKC error)

16 Manual RS8EN702 © Danfoss 2016-03 AK-CC 550

Compressor Compressor control

The compressor relay works in conjunction with the thermostat. When the thermostat calls for refrigeration the compressor relay be operated.

Running times

To prevent irregular operation, values can be set for the time the compressor is to run once it has been started. And for how long it at least has to be stopped.

The running times are not observed when defrosts start.

Min. ON-time (in minutes) c01 Min. On time Min. OFF-time (in minutes) c02 Min. O time

Time delay for couplings of two compressors

Settings indicate the time that has to elapse from the rst relay cuts in and until the next relay has to cut in. The LED on the controller’s front will show whether refrigeration is in progress. Comp Relay

Defrost Defrost control

The controller contains a timer function that is zeroset after each defrost start. The timer function will start a defrost if/when the interval time is passed. The timer function starts when voltage is connected to the controller, but it is displaced the rst time by the setting in d05. If there is power failure the timer value will be saved and continue from here when the power returns. This timer function can be used as a simple way of starting defrosts, but it will always act as safety defrost if one of the subsequent defrost starts is not received. The controller also contains a real-time clock. By means of settings of this clock and times for the required defrost times, defrost can be started at xed times of the day. Defrost start can also be accomplished via data communication, via contact signals or manual start-up. All starting methods will function in the controller. The dierent functions have to be set, so that multiple defrosts are avoided.. Defrost can be accomplished with electricity, hotgas or brine. The actual defrost will be stopped based on time or temperature with a signal from a temperature sensor.

Defrost method

Here you set whether defrost is to be accomplished with electricity, gas, or (none). During defrost the defrost relay will be cut in.

Defrost stop temperature

The defrost is stopped at a given temperature which is measured with a sensor (the sensor is dened in d10).

The temperature value is set.

c05 Step delay

Here you can read the status of the compressor relay.

d01 Def. method

0 = O 1 = El 2 = Gas

d02 Def. Stop Temp

Interval between defrost starts

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, as the interval time will otherwise start a defrost which a little later will be followed by 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. The interval time is not active when set to 0.

Max. defrost duration

This setting is a safety time so that the defrost will be stopped if there has not already been a stop based on temperature or via coordinated defrost.

Time staggering for defrost cutins 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 (d03). The function delays the interval time d03 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.

d03 Def Interval

(0=o)

d04 Max Def. time

d05 Time Stagg.

AK-CC 550 Manual RS8EN702 © Danfoss 2016-03 17

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 DripO time

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 water is “tied” to the evaporator).

Fan start temperature

The fan may also be started a little earlier than mentioned under “Delay of fan start after defrost”, if the defrost sensor S5 registers a lower value than the one set here.

Fan cut in during defrost

Here you can set whether 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 Defrost sensor Here you dene the defrost sensor. 0: None, defrost is based on time 1: S5 2: S4 3: Sx. For application 1 to 8 and 10 defrosting is stopped when both S5 and S6 have

reached the set temperature (Both sensors must be placed on the evaporator). For application 9 defrosting is stopped individually on the two sections of S5 / S5B

Pumpdown delay

Set the time where the evaporator is emptied of refrigerant prior to the defrost.

Drain delay (only in connection with hotgas)

Set the time where the evaporator is emptied of condensed refrigerant after the defrost.

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 cut out.

Delay on stop of heating in the drip tray

The time applies from the time the defrost stops by time or temperature to the time the heating element in the drip tray needs to be disconnected.

Adaptive defrosting

An adaptive defrosting is an extra defrost in addition to the scheduled defrosts. Here the adaptive defrost is set for when it can start a defrost if the need arises: 0: Never 1: Only alarm on ice over 2: It may only start during day operation 3: It may start both during day and night operation 4: It can only start during night operations

Restart of adaptive defrosting

The function starts a defrost and when it is complete, the tuning function restarts so that the evaporator’s data can be registered. MUST ONLY BE ACTIVATED DURING STANDARD OPERATION. If you wish to see the temperature at the defrost sensor, push the controller’s lowermost button. (May be changed to another function in o92.)

If you wish to start an extra defrost, push the controller’s lowermost button for four seconds. You can stop an ongoing defrost in the same way

d07 FanStartDel

d08 FanStartTemp

d09 FanDuringDef

d10 DefStopSens.

d16 Pump dwn del.

d17 Drain del

d18 MaxTherRunT

d20 Drip Tray del

d21 AD mode

d22 AD reset

Defrost temp.

Def Start Here you can start a manual defrost

Hold After Def Shows ON when the controller is operating with coordinated defrost.

Disable def. Defrost in progress can be stopped

Defrost State Status on defrost 1= pump down / defrost

Parameter for cooling function Integration time

Expert setting for injection function The value should only be changed by specially trained sta.

Max. value for the superheat reference n09 Max SH Min. value for the superheat reference n10 Min SH MOP temperature

If no MOP function is required, select pos. OFF

18 Manual RS8EN702 © Danfoss 2016-03 AK-CC 550

n05 Tn sec

n11 MOP temp

(A value of 15 corresponds to OFF)

Temperatureglide (only when using of S1-temperature sensor)

If a zeotrope refrigerant is used, a value for temperature glide must be set.

AKV valve’s time period in seconds

Should only be set to a lower value if it is a decentralised plant and the suction pressure uctuates a lot and in line with the opening of the AKV valve.

Startup time for signal reliability

If the controller does not obtain a reliable S1 signal within this period of time it will in other ways try to create a stable signal. (A too high value may result in a ooded evaporator). The value should only be changed by specially trained sta.

Average opening degree

The controller continuously registers the valve’s opening degree and uses the value in its regulation. The value should only be changed by specially trained sta.

Signal reliability at startup

The regulation uses the value as start value for the valve’s opening degree for each thermostat cutin. In connection with adaptive control the controller continuously calculates a new value. The value should only be changed by specially trained sta. Stability factor for regulation of superheat (Stability) With a higher value the control function will allow a greater uctuation of the superheat before the reference is changed. The value should only be changed by specially trained sta. (Factory setting = 4.0)

Ampication factor

Expert setting for injection function The value should only be changed by specially trained sta.

Integration time

Expert setting for injection function The value should only be changed by specially trained sta.

Choice of sensor for superheat function (can only be set if "r12" = 0) 1: Pressure transmitter type AKS 32R 2: Temperature sensor S1 (Pt1000 Ohm at 0°C)

Fan Fan control 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. With setting +50°C the function is interrupted.

Pulse operation of fan

0: No pulse operation 1: Pulse operation when the thermostat does not call for refrigeration 2: Pulse operation when the thermostat does not call for refrigeration, but only during night operation

Pulse operation period for fan

Here the overall pulse time is set. The sum of ON-to and OFF time.

ON time for fan

Here the % part of the period the fans are to be in operation is set. The LED on the controller’s front will indicate whether a defrost is going on. Fan Relay

n12 Glide

n13 AKV Period

n15 StartUp time

n16 AKV Dim.

n17 Start OD %

n18 -

n23 MTR Kp factor

n24 MTR Tn sec

n57 Pe/S1 select

F04 FanStopTemp.

F05 FanPulseMode

F06 Fan cycle

F07 Fan ON %

Here you can read the fan relay status, or force-control the relay in “Manual control” mode.

Internal defrosting schedule/clock function

(Not used if an external defrosting schedule is used via data communication.) Up to six individual times can be set for the defrost start throughout the day.

Defrost start, hour setting t01-t06

Defrost start, minute setting (1 and 11 belong together, etc.) When all t01 to t16 equal 0 the clock will not start defrosts.

Real-time clock:: Setting the clock is only necessary when there is no data communication.

In the event of a power failure of less than four hours, the clock function will be saved. Clock: Hour setting t07

Clock: Minute setting t08

Clock: Date setting t45

Clock: Month setting t46

AK-CC 550 Manual RS8EN702 © Danfoss 2016-03 19

t11-t16

Clock: Year setting t47

Miscellaneous Miscellaneous 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.

Digital input signal - DI1

The controller has a digital input 1 which can be used for one of the following functions: O: The input is not used

1) Status display of a contact function

2) Door function. When the input is open it signals that the door is open. The refrigeration and the fans are stopped and light switched on. When the time setting in “A04” is passed, an alarm will be given and refrigeration will be resumed (o89).

3) Door alarm. When the input is open it signals that the door is open. When the time setting in “A04” is passed, there will be alarm.

4) Defrost. The function is started with a pulse signal. The controller will register when the DI input is activated. The controller will then start a defrost cycle.

5) Main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when the input is put in pos. OFF.

6) Night operation. When the input is short-circuited, there will be regulation for night operation.

7) Thermostat band changeover. Switch to thermostat 2 (r21).

8) Separate alarm function. Alarm will be given when the input is short-circuited.

9) Separate alarm function. Alarm will be given when the input is opened. (For 8 and 9 the time delay is set in A27)

10) Case cleaning. The function is started with a pulse signal. See also description on page 5.

11) Forced refrigeration at hotgas defrost when the input is short-circuited.

12) Night cover

If the controller is built into a network with data communication, it must have an address, and the master gateway of the data communication must then know this address.

o01 DelayOfOutp.

o02 DI 1 Cong.

Denition takes place with the numerical value shown to the left.

(0 = o)

DI state (Measurement) The DI input’s present status is shown here. ON or OFF.

The address is set between 0 and 240, depending on the system unit and the selected data communication. If the system unit is gateway type AKA 245, the version must be

6.20 or higher.

The address is sent to the gateway when the menu is set in pos. ON IMPORTANT: Before you set o04, you MUST set o61. Otherwise you will be transmitting incorrect data.

(The function is not used when the data communication is MODBUS)

Access code 1 (Access to all settings)

If the settings in the controller are to be protected with an access code you can set a numerical value between 0 and 100. If not, you can cancel the function with setting 0. (99 will always give you access).

Sensor type for S3, S4, S5, S6

Normally a Pt 1000 sensor with great signal accuracy is used. But you can also use a sensor with another signal accuracy. That may either be a PTC 1000 sensor. All the mounted sensors S3-S6 must be of the same type. Max. standby time after coordinated defrost When a controller has completed a defrost it will wait for a signal which tells that the refrigeration may be resumed. If this signal fails to appear for one reason or another, the controller will itself start the refrigeration when this standby time has elapsed.

Select signal for the display S4%

Here you dene the signal to be shown by the display. S3, S4, or a combination of the two. With setting 0% only S3 is used. With 100% only S4.

Pe. Working range for pressure transmitter - min. value

Pe. Working range for pressure transmitter - max. value

Refrigerant setting (only if "r12" = 0) Before refrigeration is started, the refrigerant must be dened. You may choose between the following refrigerants 1=R12. 2=R22. 3=R134a. 4=R502. 5=R717. 6=R13. 7=R13b1. 8=R23. 9=R500. 10=R503. 11=R114. 12=R142b. 13=Userdened. 14=R32. 15=R227. 16=R401A. 17=R507. 18=R402A. 19=R404A. 20=R407C. 21=R407A. 22=R407B. 23=R410A. 24=R170. 25=R290. 26=R600. 27=R600a. 28=R744. 29=R1270. 30=R417A. 31=R422A

Warning: Wrong selection of refrigerant may cause damage to the compressor.

Other refrigerants: Here Setting 13 is selected and then three factors -Ref.Fac a1, a2 and a3 - via AKM must be set.

o03

o04

o05 Acc. code

o06 SensorCong

Pt = 0 PTC = 1

o16 Max HoldTime

o17 Disp. S4%

o20 MinTransPres

o21 MaxTransPres

o30 Refrigerant

20 Manual RS8EN702 © Danfoss 2016-03 AK-CC 550

Digital input signal - D2

The controller has a digital input 2 which can be used for one of the following functions: O: The input is not used.

1) Status display of a contact function

2) Door function. When the input is open it signals that the door is open. The refrigeration and the fans are stopped. When the time setting in “A04” is passed, an alarm will be given and refrigeration resumed. (o89).

3) Door alarm. When the input is open it signals that the door is open. When the time setting in “A04” is passed an alarm will be given.

4) Defrost. The function is started with a pulse signal. The controller will register when the DI input is activated. The controller will then start a defrost cycle. If the signal is to be received by several controllers it is important that ALL connections are mounted the same way (DI to DI and GND to GND).

5) Main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when the input is put in pos. OFF.

6) Night operation. When the input is short-circuited, there will be regulation for night operation.

7) Thermostat band changeover. Switch to thermostat 2 (r21)

8) Separate alarm function. Alarm will be given when the input is short-circuited.

9) Separate alarm function. Alarm will be given when the input is opened.

10) Case cleaning. The function is started with a pulse signal. See also description on page 5.

11) Forced refrigeration at hotgas defrost when the input is short-circuited.

12) Night blinds. When the input is short-circuited the night blinds will be activated.

13) The input is used for coordinated defrost in conjunction with other controllers of the same type

Conguration of light function

1) Light is controlled via day/night status

2) Light is controlled via data communication and "Light remote o39"

3) Light is controlled by door contact, dened in either o02, o37 or o84 where the setting is selected to either 2 or 3. 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.

Activation of light relay

The light relay can be activated here, but only if dened in o38 with setting 2.

Rail heat during day operation

The ON period is set as a percentage of the time

Rail heat during night operation

The ON period is set as a percentage of the time

Rail heat cycle

The period of time for the aggregate ON time + OFF time is set in minutes

Case cleaning

The status of the function can be followed here or the function can be started manually. 0 = Normal operation (no cleaning) 1 = Cleaning with fans operating. All other outputs are O. 2 = Cleaning with stopped fans. All outputs are O. If the function is controlled by a signal at the DI1, DI2 or DI3 input, the relevant status can be seen here in the menu.

Selection of application

The controller can be dened in various ways. Here you set which of the 10 applications is required. On page 12 you can see a survey of applications.

This menu can only be set when regulation is stopped, i.e. “r12” is set to 0.

Transfer a set of pre-settings to the controller

An option exists to select quick settings for a number of parameters. This is based on whether an appliance or a room needs to be controlled or whether the defrosting must be stopped by time or by temperature. The overview can be seen on page 27.

This menu can only be set when the control is stopped, i.e. When "r12" is set at 0.

o37 DI2 cong.

o38 Light cong

o39 Light remote

o41 Railh.ON day%

o42 Railh.ON ngt%

o43 Railh. cycle

o46 Case clean

o61 Appl. Mode

o62 -

On setting the value will fall back to 0. A subsequent adjustment/setting of parameters can be carried out as required.

Access code 2 (Access to adjustments)

There is access to adjustments of values, but not to conguration settings. If the settings in the controller are to be protected with an access code you can set a numerical value between 0 and 100. If not, you can cancel the function with setting 0. If the function is used, access code 1 (o05) must also be used.

Save as factory setting

With this setting you save the controller’s actual settings as a new basic setting (the earlier factory settings are overwritten).

AK-CC 550 Manual RS8EN702 © Danfoss 2016-03 21

o64 Acc. code 2

o67 -

Digital input signal - DI3 (high voltage input)

The controller has a digital input 3 which can be used for one of the following functions: O: The input is not used.

1) Status display of 230 V signal

2) Door function. When the input is 0 V it signals that the door is open. The refrigeration and the fans are stopped. When the time setting in “A04” is passed, an alarm will be given and refrigeration resumed. (o89)

3) Door alarm. When the input is 0 V it signals that the door is open. When the time setting in “A04” is passed an alarm will be given.

4) Defrost. The function is started with a pulse signal. (puls on 230 V)

5) Main switch. Regulation is carried out when the input is 230 V, and regulation is stopped when the input is 0 V.

6) Night operation. When the input is 230 V, there will be regulation for night opera-

tion.

7) Thermostat band changeover. Switch to thermostat 2 (r21)

8) Not used.

9) Not used.

10) Case cleaning. The function is started with a pulse signal (pulse on 230 V). See also description on page 5.

11) Forced refrigeration at hotgas defrost when the input is 230 V.

12) Night cover

13) Not used

14) Cooling stopped with the function "Forced closing"

Rail heat control

The rail heat can be controlled in several ways: 0: The function is not used 1: Pulse control is used with a timer function following the day/night operation (o41 and o42) 2: Pulse control is used with a dew point function. This function requires that a signal is received about the dew point value. The value is measured by a system manager and sent to the controller via the data communication.

Dew point value where the rail heat is minimum

This function is discussed earlier in the manual.

Dew point value where the rail heat is maximum

This function is discussed earlier in the manual.

Lowest permitted rail heat eect

Here the % part of the eect to be achieved when the dew point value is minimum.

Start of refrigeration when door is open

If the door has been left open, refrigeration must be started after a set time. That time can be set here.

Fan for "Forced Closing"

You can set whether fans should be operational or stopped if the function "Forced closing" is activated here. On "No or 0" the fans are stopped. On "Yes or 1" they will be operational.

Alternative display

A reading can be displayed by pressing the lower button on the controller. This reading is set from the factory so that the defrosting stop temperature is displayed. A dierent setting will give the following reading: 1: (Defrost stop temperature = factory setting) 2: S6 temperature 3: S5B temperature (Application 9 only)

Display of temperature during normal operation

1: Air temperature. Weighted S3 + S4 2: Product temperature S6

o84 DI3 cong.

o85 Railh. mode

o86 DewP Min lim

o87 DewP Max lim

o88 Rail Min ON%

o89 DoorInjStart

o90 Fan ForcedCl

o92 Displ menu 2

o97 Disp. Ctrl.

Light and night blinds denition

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.

Conguration of the alarm relay

The alarm relay will be activated upon an alarm signal from the following groups: 1 - High temperature alarms 2 - Low temperature alarms 4 - Sensor error 8 - Digital input is activated for alarm 16 - Defrost alarms 32 - Miscellaneous 64 - Injection alarms The groups that are to activate the alarm relay must be set by using a numerical value which is the sum of the groups that must be activated. (E.g. a value of 5 will activate all high temperature alarms and all sensor errors. 0 will cancel the relay function)

22 Manual RS8EN702 © Danfoss 2016-03 AK-CC 550

o98 Light MS = O

P41 Al.Rel. Conf.

Service Service

Temperature measured with S5 sensor u09 S5 temp. Status on DI1 input. on/1=closed u10 DI1 status Read the duration of the ongoing defrost or the duration of the last completed

defrost. Temperature measured with S3 sensor u12 S3 air temp Status at the day-/night operation (night operation: on/o) u13 Night Cond. Temperature measured with S4 sensor u16 S4 air temp Thermostat temperature u17 Ther. air Read the ongoing cutin time for the thermostat or the duration of the last com-

pleted cutin Read the temperature at the S1 sensor u19 S1 temp. Read the temperature at the S2 sensor u20 S2 temp. Read superheat u21 Superheat Read the control’s actual superheat reference u22 SH ref. Read the valve’s actual opening degree u23 AKV OD % Read the evaporating pressure u25 Evap.press Pe Read the evaporating temperature u26 Evap.temp Te Read the temperature at the S6 sensor u36 S6 temp Status on DI2 output. on/1=closed u37 DI2 status Air temperature. Weighted S3 + S4 u56 Display air Measured temperature for alarm thermostat * Status on relay for cooling u58 Comp1/LLSV * Status on relay for fan u59 Fan relay * Status on relay for defrost u60 Def. relay * Status on relay for railheat u61 Railh. relay * Status on relay for alarm u62 Alarm relay * Status on relay for light u63 Light relay * Status on relay for valve in suction line u64 SuctionValve * Status on relay for compressor 2

* Temperature measured with S5B sensor

* Status on relay for hot gas

* Status on relay for heating element in drip tray

* Status on relay for night blinds

* Status on relay for defrost B

* Status on relay for heat function

* Readout of the actual rail heat eect in %

Readout of which thermostat used for regulation: 1= Thermostat 1, 2= Thermostat 2

Status on input DI3 (on/1 = 230 V)

Readout of the actual cutin value for the thermostat

Readout of the actual cut out value for the thermostat

Status on function "Adaptive defrost" 0: O. Function is not activated 1: Error. A reset must be carried out using d22 2: Reset is activated. New tuning is in progress 3: Normal 4: Light build-up of ice 5: Medium build-up of ice 6: Heavy build-up of ice

*) Not all will be displayed. Only the function belonging to the selection application is displayed.

u11 Defrost time

u18 Ther runtime

u57 Alarm air

u67 Comp2 relay u75 S5 temp. B

u80 Hotgas valve

u81 Drip tray

u82 Blinds relay

u83 Def. relay B

u84 Heat relay

u85 Rail DutyC %

u86 Ther. band

u87 DI3 status

u90 Cutin temp.

u91 Cutout temp.

U01 AD state

AK-CC 550 Manual RS8EN702 © Danfoss 2016-03 23

Operating status (Measurement)

The controller goes through some regulating situations where it is just waiting for the next point of the regulation. To make these “why is nothing happening” situations

Ctrl. state:

(Shown in all menu displays) visible, you can see an operating status on the display. Push briey (1s) the upper button. If there is a status code, it will be shown on the display. The individual status codes have the following meanings:

Normal regulation S0 0 Waiting for end of the coordinated defrost S1 1 When the compressor is operating it must run for at least x minutes. S2 2 When the compressor is stopped, it must remain stopped for at least x minutes. S3 3 The evaporator drips o and waits for the time to run out S4 4 Refrigeration stopped by main switch. Either with r12 or a DI-input S10 10 Refrigeration stopped by thermostat S11 11 Defrost sequence. Defrost in progress S14 14 Defrost sequence. Fan delay — water attaches to the evaporator S15 15 Refrigeration stopped due to open ON input or stopped regulation S16 16 Door is open. DI input is open S17 17 Melt function in progress. Refrigeration is interrupted S18 18 Modulating thermostat control S19 19 Emergency cooling due to sensor error S20 20 Regulation problem in the injections function S21 21 Start-up phase 2. Evaporator being charged S22 22 Adaptive control S23 23 Start-up phase 1. Signal reliability from sensors is controlled S24 24 Manual control of outputs S25 25 No refrigerant selected S26 26 Case cleaning S29 29 Forced cooling S30 30 Delay on outputs during start-up S32 32 Heat function r36 is active S33 33

Other displays:

The defrost temperature cannot be displayed. There is stop based on time non Defrost in progress / First cooling after defrost where the temperature remains above

-d-

the thermostat band Password required. Set password PS Regulation is stopped via main switch OFF

*) Emergency cooling will take eect when there is lack of signal from a dened S3 or S4 sensor. The regulation will continue with a registered average

cutin frequency. There are two registered values – one for day operation and one for night operation.

24 Manual RS8EN702 © Danfoss 2016-03 AK-CC 550

Fault message

In an error situation the LED’s on the front will ash and the alarm relay will be activated. If you push the top button in this situation you can see the alarm report in the display. There are two kinds of error reports - it can either be an alarm occurring during the daily operation, or there may be a defect in the installation. A-alarms will not become visible until the set time delay has expired. E-alarms, on the other hand, will become visible the moment the error occurs. (An A alarm will not be visible as long as there is an active E alarm). Here are the messages that may appear:

Code / Alarm text via data communication

A1/--- High t.alarm

A2/--- Low t. alarm

A4/--- Door alarm

A5/--- Max hold time

A10/--- Inject prob.

A11/--- No Rfg. sel.

A13/--- High temp S6 Temperature alarm. High S6 1

A14/--- Low temp S6 Temperature alarm. Low S6 2

A15/--- DI1 alarm DI1 alarm 8

A16/--- DI2 alarm DI2 alarm 8

A45/--- Standby mode Standby position (stopped refrigeration via r12 or DI input) -

A59/--- Case clean Case cleaning. Signal from DI input -

A74/--- AD fault Error in the adaptive defrost function 16

A75/--- AD Iced Evaporator is iced up. Reduction of air ow 16

A76/--- AD not defr. Defrost of evaporator is not satisfactory 16

E1/--- Ctrl. error Faults in the controller 32

E6/--- RTC error Check clock 32

E20/--- Pe error Error on pressure transmitter Pe 64

E23/--- S1 error Error on S1 sensor 4

E24/--- S2 error Error on S2 sensor 4

E25/--- S3 error Error on S3 sensor 4

E26/--- S4 error Error on S4 sensor 4

E27/--- S5 error Error on S5 sensor 4

E28/--- S6 error Error on S6 sensor 4

E37/--- S5 error B Error on S5B sensor 4

---/--- Max Def.Time Defrost stopped based on time instead of, as wanted, on temperature 16

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"

Settings from System manager High 1 X X X X Middle 2 X X X Low 3 X X X Log only X Disabled

Description Alarm relay groups (P41)

High temperature alarm

Low temperature alarm

Door alarm

The ”o16” function is activated during a coordinated defrost

Control problem

No refrigerant selected

Settings from AKM (AKM destination)

Log Alarm relay Send via

Non High Low-High

Network

AK-CC 550 Manual RS8EN702 © Danfoss 2016-03 25

Operation

Display

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.

Light-emitting diodes (LED) on front panel

The LED’s on the front panel will light up when the relevant relay is activated.

= Refrigeration = Defrost = Fan running

The light-emitting diodes will ash when there is an alarm. In this situation you can download the error code to the display and cancel/sign for the alarm by giving the top button a brief push.

The buttons

When you want to change a setting, the upper and the lower buttons will give you a higher or lower value depending on the button you are pushing. But before you change the value, you must have access to the menu. You obtain this by pushing the upper button for a couple of seconds - you will then enter the column with parameter codes. Find the parameter code you want to change and push the middle buttons until value for the parameter is shown. When you have changed the value, save the new value by once more pushing the middle button.

Get a good start

With the following procedure you can start regulation very quickly:

1 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.)

2 Select electrical connection based on the drawings on page 12

and 13

3 Open parameter o61 and set the electric connection number in

4 Now select one of the preset settings from the table on page 27.

5 Open parameter o62 and set the number for the array of preset-

tings. The few selected settings will now be transferred to the menu.

6 Open parameter n57 and select method for measuring of

evaporator pressure Pe or S1 (factory setting is Pe pressure transmitter)

7 If pressure transmitter Pe is used you must select refrigerant via

parameter o30

8 Open parameter r12 and start the regulation

9 Go through the survey of factory settings. The values in the grey

cells are changed according to your choice of settings. Make any necessary changes in the respective parameters.

Examples

Set menu

1. Push the upper button until a parameter r01 is shown

2. Push the upper or the lower button and nd that parameter you want to change

3. Push the middle button until the parameter value is shown

4. Push the upper or the lower button and select the new value

5. Push the middle button again to freeze the value.

Cutout alarm relay / receipt alarm/see alarm code

• A short press of the upper button

If there are several alarm codes they are found in a rolling stack. Push the uppermost or lowermost button to scan the rolling stack.

Set temperature

1. Push the middle button until the temperature value is shown

2. Push the upper or the lower button and select the new value

3. Push the middle button again to conclude the setting.

Reading the temperature at defrost sensor (Or product sensor, if selected in o92.)

• A short press of the lower button

Manuel start or stop of a defrost

• Push the lower button for four seconds.

10 For network. Set the address in o03

11 Send address to system unit:

• MODBUS: Activate scan function in system unit

• If another data communication card is used in the controller:

- LON RS485: Activate the function o04

- DANBUSS: Activate the function o04

- Ethernet: Use the MAC address

26 Manual RS8EN702 © Danfoss 2016-03 AK-CC 550

Auxiliary schedule for settings (quick-setup)

Case Room

Defrost stop on

time

Preset settings (o62) 1 2 3 4 5 6

Temperature (SP)

Max. temp. setting (r02)

Min. temp. setting (r03)

Sensor signal for thermostat. S4% (r15)

Alarm limit high (A13)

Alarm limit low (A14)

Sensor signal for alarm funct.S4% (A36)

Interval between defrost (d03)

Defrost sensor: 0=time, 1=S5, 2=S4 (d10)

DI1 cong. (o02)

Sensor signal for display view S4% (017)

2°C -2°C -28°C 4°C 0°C -22°C

6°C 4°C -22°C 8°C 5°C -20°C

0°C -4°C -30°C 0°C -2°C -24°C

8°C 6°C -15°C 10°C 8°C -15°C

-5°C -5°C -30°C 0°C 0°C -30°C

0% 100% 0%

6 h 6h 12h 8h 8h 6h

0 1 1 0 1 1

Case cleaning (=10) Door function (=2)

Note: For applications 9 and 10 the sensor weighting for the S3/S4 sensors is not used for the thermostat, alarm thermostat and display readings as the sensor uses are predened.

Defrost stop

on S5

100% 0%

Defrost stop on

time

Defrost stop

on S5

AK-CC 550 Manual RS8EN702 © Danfoss 2016-03 27

Menu survey

Parameter EL-diagram page 12 or 13

Function Code 1 2 3 4 5 6 7 8 9 10

Normal operation

Temperature (setpoint) - - - 1 1 1 1 1 1 1 1 1 1 -50°C 50°C 2

Thermostat

Dierential r01 1 1 1 1 1 1 1 1 1 1 0.1 K 20 K 2

Max. limitation of setpoint setting

Min. limitation of setpoint setting

Adjustment of temperature indication

Temperature unit (°C/°F)

Correction of the signal from S4

Correction of the signal from S3

Manual service, stop regulation, start regulation (-1, 0, 1)

Displacement of reference during night operation

Dene thermostat function 1=ON/OFF, 2=Modulating

Denition and weighting, if applicable, of thermostat sensors - S4% (100%=S4, 0%=S3)

Time between melt periods

Duration of melt periods

Temperature setting for thermostat band 2 . As dierential

r02 1 1 1 1 1 1 1 1 1 1 -49°C 50°C 50 r03 1 1 1 1 1 1 1 1 1 1 -50°C 49°C -50 r04 1 1 1 1 1 1 1 1 1 1 -10 10 0

r05 1 1 1 1 1 1 1 1 1 1 0/°C 1/F 0/°C r09 1 1 1 1 1 1 1 1 1 1 -10 K 10 K 0 r10 1 1 1 1 1 1 1 1 1 1 -10 K 10 K 0 r12 1 1 1 1 1 1 1 1 1 1 -1 1 0 r13 1 1 1 1 1 1 1 1 1 1 -50 K 50 K 0 r14 1 1 1 1 1 1 1 1 1 1 1 2 1

r15 1 1 1 1 1 1 1 1 0 % 100 % 100

r16 1 1 1 1 1 1 1 1 1 1 0 hrs 10 hrs 1 r17 1 1 1 1 1 1 1 1 1 1 0 min. 30 min. 5 r21 1 1 1 1 1 1 1 1 1 1 -50°C 50°C 2

use r01

Correction of the signal from S6 r59 1 1 1 1 1 1 1 1 1 -10 K 10 K 0

Denition and weighting, if applicable, of thermostat sensors when night cover is on. (100%=S4, 0%=S3)

Heat function

r61 1 0 % 100 % 100

r62 1 0 K 50 K 2

Neutral zone between refrigeration and heat function

Time delay at switch between refrigeration and heat

r63 1 0 min. 240 min. 0

function

Alarms

Delay for temperature alarm

Delay for door alarm

Delay for temperature alarm after defrost

High alarm limit for thermostat 1

Low alarm limit for thermostat 1

High alarm limit for thermostat 2

Low alarm limit for thermostat 2

High alarm limit for sensor S6 at thermostat 1

Low alarm limit for sensor S6 at thermostat 1

High alarm limit for sensor S6 at thermostat 2

Low alarm limit for sensor S6 at thermostat 2

S6 alarm time delay With setting = 240 the S6 alarm will be omitted

Alarm time delay or signal on the DI1 input

Alarm time delay or signal on the DI2 input

Signal for alarm thermostat. S4% (100%=S4, 0%=S3)

A03 1 1 1 1 1 1 1 1 1 1 0 min. 240 min. 30 A04 1 1 1 1 1 1 1 1 1 1 0 min. 240 min. 60 A12 1 1 1 1 1 1 1 1 1 1 0 min. 240 min. 90 A13 1 1 1 1 1 1 1 1 1 1 -50°C 50°C 8 A14 1 1 1 1 1 1 1 1 1 1 -50°C 50°C -30 A20 1 1 1 1 1 1 1 1 1 1 -50°C 50°C 8 A21 1 1 1 1 1 1 1 1 1 1 -50°C 50°C -30 A22 1 1 1 1 1 1 1 1 1 -50°C 50°C 8 A23 1 1 1 1 1 1 1 1 1 -50°C 50°C -30 A24 1 1 1 1 1 1 1 1 1 -50°C 50°C 8 A25 1 1 1 1 1 1 1 1 1 -50°C 50°C -30 A26 1 1 1 1 1 1 1 1 1 0 min. 240 min. 240

A27 1 1 1 1 1 1 1 1 1 1 0 min. 240 min. 30 A28 1 1 1 1 1 1 1 1 1 1 0 min. 240 min. 30 A36 1 1 1 1 1 1 1 1 0 % 100 % 100

Delay for S6 (product sensor alarm) after defrost A52 1 1 1 1 1 1 1 1 1 0 min. 240 min. 90

Compressor

Min. ON-time c01 1 1 1 1 0 min. 30 min. 0 Min. OFF-time c02 1 1 1 1 0 min. 30 min. 0

Time delay for cutin of comp.2

c05 1 0 sec 999 sec 5

Defrost

Defrost method: 0=none, 1= EL, 2= Gas d01 1 1 1 1 1 1 1 1 1 1 0/O 2/gAs 1/EL

Defrost stop temperature

Interval between defrost starts

Max. defrost duration

Displacement of time on cutin of defrost at start-up

Drip o time

Delay for fan start after defrost

Fan start temperature

Fan cutin during defrost

d02 1 1 1 1 1 1 1 1 1 1 0°C 50°C 6 d03 1 1 1 1 1 1 1 1 1 1 0 hrs/O 240 hrs 8

d04 1 1 1 1 1 1 1 1 1 1 0 min. 360 min. 45 d05 1 1 1 1 1 1 1 1 1 1 0 min. 240 min. 0

d06 1 1 1 1 1 1 1 1 1 1 0 min. 60 min. 0 d07 1 1 1 1 1 1 1 1 1 1 0 min. 60 min. 0 d08 1 1 1 1 1 1 1 1 1 1 -50 °C 0 °C -5

d09 1 1 1 1 1 1 1 1 1 1 0 2 1 0: Stopped 1: Running 2: Running during pump down and defrost

Defrost sensor: 0 =Stop on time, 1=S5, 2=S4, 3=Sx

d10 1 1 1 1 1 1 1 1 1 1 0 3 0 (Application 1-8 and 10: both S5 and S6. Application 9: S5 and S5B)

Min.-value Max.-value

Factory

setting

SW = 1.5x

Actual

setting

Continued Code 1 2 3 4 5 6 7 8 9 10 Min. Max. Fac. Actual

Pump down delay

d16 1 1 1 1 1 1 1 1 1 1 0 min. 60 min. 0

Drain delay (used at hot gas defrost only) d17 1 0 min. 60 min. 0

Max. aggregate refrigeration time between two defrosts

Heat in drip tray. Time from defrosting stops to heating

d18 1 1 1 1 1 1 1 1 1 1 0 hrs 48 hrs 0/OFF d20 1 0 min. 240 min. 30

in the drip tray is switched o Extra defrost with adaptive function allowed:

d21 1 1 1 1 1 1 1 1 1 1 0 4 0 0=none, 1=monitoring only, 2=Day only, 3=Both day and night, 4=Night only

Reset of the "Adaptive defrosting function" (starts a

d22 1 1 1 1 1 1 1 1 1 1 0/OFF 1/ON 0/OFF defrost and starts subsequent new tuning)

Injection control function

Injection algorithm

n05 1 1 1 1 1 1 1 1 1 1 30 sec 600 sec 150 Only for trained personnel

Max. value of superheat reference

Min. value of superheat reference

n09 1 1 1 1 1 1 1 1 1 1 3°C 20°C 12

n10 1 1 1 1 1 1 1 1 1 1 3°C 20°C 3 MOP temperature. O if MOP temp. = 15.0 °C n11 1 1 1 1 1 1 1 1 1 1 -50°C 15°C 15 Glide for Ezotrope refrigerant (at S1-measurement only) n12 1 1 1 1 1 1 1 1 1 1 0 K 10 K 0 Period time of AKV pulsation

Only for trained personnel

Injection algorithm

Only for trained personnel

Injection algorithm

Only for trained personnel

Injection algorithm

Only for trained personnel

Injection algorithm

Only for trained personnel

Injection algorithm

Only for trained personnel

Injection algorithm

Only for trained personnel

Selection of signal to superheat measurement: 1=

n13 1 1 1 1 1 1 1 1 1 1 3 sec 6 sec 6

n15 1 1 1 1 1 1 1 1 1 1 30 sec 600 sec 180

n16 1 1 1 1 1 1 1 1 1 1 10 % 75 % 30

n17 1 1 1 1 1 1 1 1 1 1 5 % 70 % 30

n18 1 1 1 1 1 1 1 1 1 1 0 10 4

n23 1 1 1 1 1 1 1 1 1 1 1 50 6

n24 1 1 1 1 1 1 1 1 1 1 100 sec 1800 sec 900

n57 1 1 1 1 1 1 1 1 1 1 1 2 1 pressure transmitter AKS32R, 2= Temperature sensor S1

Fan

Fan stop temperature (S5)

Pulse operation on fans: 0=No pulse operation, 1=At

F04 1 1 1 1 1 1 1 1 1 1 -50°C 50°C 50

F05 1 1 1 1 1 1 1 1 1 1 0 2 0 thermostat cuts out only, 2= Only at thermostat cut outs during night operation

Period time for fan pulsation (on-time + o-time) F06 1 1 1 1 1 1 1 1 1 1 1 min. 30 min. 5 On-time in % of period time F07 1 1 1 1 1 1 1 1 1 1 0 % 100 % 100

Real time clock

Six start times for defrost. Setting of hours. 0=OFF

Six start times for defrost. Setting of minutes. 0=OFF

Clock - Setting of hours

Clock - Setting of minute

Clock - Setting of date

Clock - Setting of month

Clock - Setting of year

Miscellaneous

Delay of output signals after start-up

Input signal on DI1. Function: 0=not used. 1=status on DI1. 2=door function with alarm when open. 3=door alarm when open. 4=defrost start (pulse-signal). 5=ext.main switch. 6=night operation 7=thermostat band changeover (activate r21). 8=alarm function when closed. 9=alarm function when open. 10=case cleaning (pulse signal). 11=forced cooling at hot gas defrost, 12=night cover

Network address (0=o)

On/O switch (Service Pin message) IMPORTANT! o61 must be set prior to o04

t01 -

1 1 1 1 1 1 1 1 1 1 0 hrs 23 hrs 0

t06

t11 -

1 1 1 1 1 1 1 1 1 1 0 min. 59 min. 0

t16

t07 1 1 1 1 1 1 1 1 1 1 0 hrs 23 hrs 0

t08 1 1 1 1 1 1 1 1 1 1 0 min. 59 min. 0

t45 1 1 1 1 1 1 1 1 1 1 1 day 31 day 1

t46 1 1 1 1 1 1 1 1 1 1 1 mon. 12 mon. 1

t47 1 1 1 1 1 1 1 1 1 1 0 year 99 year 0

o01 1 1 1 1 1 1 1 1 1 1 0 sec 600 sec 5

o02 1 1 1 1 1 1 1 1 1 1 0 12 0

o03 1 1 1 1 1 1 1 1 1 1 0 240 0

o04 1 1 1 1 1 1 1 1 1 1 0/O 1/On 0/O

(used at LON 485 and DANBUSS only)

Access code 1 (all settings)

Used sensor type : 0=Pt1000, 1=Ptc1000, o06 1 1 1 1 1 1 1 1 1 1 0/Pt 1/Ptc 0/Pt

Max hold time after coordinated defrost

Select signal for display view. S4% (100%=S4, 0%=S3)

Pressure transmitter working range – min. value

Pressure transmitter working range – max. value

o05 1 1 1 1 1 1 1 1 1 1 0 100 0

o16 1 1 1 1 1 1 1 1 1 1 0 min. 360 min. 20

o17 1 1 1 1 1 1 1 1 0 % 100 % 100

o20 1 1 1 1 1 1 1 1 1 1 -1 bar 5 bar -1

o21 1 1 1 1 1 1 1 1 1 1 6 bar 200 bar 12

Continued Code 1 2 3 4 5 6 7 8 9 10 Min. Max. Fac. Actual

Refrigerant setting:

o30 1 1 1 1 1 1 1 1 1 1 0 31 0 1=R12. 2=R22. 3=R134a. 4=R502. 5=R717. 6=R13. 7=R13b1. 8=R23. 9=R500. 10=R503. 11=R114. 12=R142b. 13=User dened. 14=R32. 15=R227. 16=R401A. 17=R507. 18=R402A. 19=R404A. 20=R407C. 21=R407A. 22=R407B. 23=R410A. 24=R170. 25=R290. 26=R600. 27=R600a. 28=R744. 29=R1270. 30=R417A. 31=R422A.

Input signal on DI2. Function: (0=not used. 1=status on DI2. 2=door function with alarm when open. 3=door alarm when open. 4=defrost start (pulse-signal). 5=ext. main switch 6=night operation 7=thermostat band changeover (activate r21). 8=alarm function when closed. 9=alarm function when open. 10=case cleaning (pulse signal). 11=forced cooling at hot gas defrost.). 12=night cover, 13=coordinated defrost)

Conguration of light function: 1=Light follows day /night

o37 1 1 1 1 1 1 1 1 1 1 0 13 0

o38 1 1 1 1 1 1 1 1 1 4 1 operation, 2=Light control via data communication via ‘o39’, 3=Light control with a DI-input, 4=As "2", but light switch on and night cover will open if the network cut out for more than 15 minutes.

Activation of light relay (only if o38=2) On=light o39 1 1 1 1 1 1 1 1 0/O 1/On 0/O

Rail heat On time during day operations

Rail heat On time during night operations

Rail heat period time (On time + O time)

Case cleaning. 0=no case cleaning. 1=Fans only. 2=All output O.

Selection of EL diagram. See overview page 12 and 13

Download a set of predetermined settings. See overview page 27.

Access code 2 (partial access)

Replace the controllers factory settings with the present settings

Input signal on DI3. Function: (high voltage input) (0=not used. 1=status on DI2. 2=door function with alarm when open. 3=door alarm when open. 4=defrost start (pulse-signal). 5=ext. main switch 6=night operation,

o41 1 1 1 1 1 1 1 0 % 100 % 100

o42 1 1 1 1 1 1 1 0 % 100 % 100

o43 1 1 1 1 1 1 1 6 min. 60 min. 10

*** o46 1 1 1 1 1 1 1 1 1 1 0 2 0

* o61 1 1 1 1 1 1 1 1 1 1 1 10 1 * o62 1 1 1 1 1 1 1 1 1 1 0 6 0

*** o64 1 1 1 1 1 1 1 1 1 1 0 100 0

o67 1 1 1 1 1 1 1 1 1 1 0/O 1/On 0/O

o84 1 1 1 1 1 1 1 1 1 1 0 14 0

7=thermostat band changeover (activate r21). 8=Not used. 9=Not used. 10=case cleaning (pulse signal). 11=forced

cooling at hot gas defrost, 12=night cover. 13=Not used.

14=Refrigeration stopped (forced closing)) Rail heat control

o85 1 1 1 1 1 1 1 0 2 0 0=not used, 1=pulse control with timer function (o41 and o42), 2=pulse control with dew point function

Dew point value where the rail heat is minimum o86 1 1 1 1 1 1 1 -10°C 50°C 8 Dew point value where the rail heat is 100% on o87 1 1 1 1 1 1 1 -9°C 50°C 17 Lowest permitted rail heat eect in % o88 1 1 1 1 1 1 1 0 % 100 % 30 Time delay from "open door” refrigeration is started o89 1 1 1 1 1 1 1 1 1 1 0 min. 240 min. 30 Fan operation on stopped refrigeration (forced closing):

o90 1 1 1 1 1 1 1 1 1 1 0/no 1/yes 1/yes no/0=Fan O, yes/1=Fan On

Denition of readings on lower button:

o92 1 1 1 1 1 1 1 1 1 1 1 3 1 1=defrost stop temperature, 2=S6 temperature, 3=S5_B temperature

Display of temperature

o97 1 1 1 1 1 1 1 1 1 1 1 2 1

1= u56 Air temperature 2= u36 product temperature

Light and night blinds dened

o98 1 1 1 1 1 1 1 1 1 1 0 1 0

0: Light is switch o and night blind is open when the main switch is o 1: Light and night blind is independent of main switch

Conguration of alarm relay

P41 1 1 1 1 1 0 127 111

Continued Code 1 2 3 4 5 6 7 8 9 10 Min. Max. Fac. Actual

Service

Temperature measured with S5 sensor

Status on DI1 input. on/1=closed

u09 1 1 1 1 1 1 1 1 1 1 u10 1 1 1 1 1 1 1 1 1 1

Actual defrost time (minutes) u11 1 1 1 1 1 1 1 1 1 1

Temperature measured with S3 sensor

Status on night operation (on or o) 1=on

Temperature measured with S4 sensor

u12 1 1 1 1 1 1 1 1 1 1 u13 1 1 1 1 1 1 1 1 1 1 u16 1 1 1 1 1 1 1 1 1 1

Thermostat temperature u17 1 1 1 1 1 1 1 1 1 1 Run time of thermostat (cooling time) in minutes u18 1 1 1 1 1 1 1 1 1 1 Temperature of evaporator inlet temp u19 1 1 1 1 1 1 1 1 1 1 Temperature of evaporator outlet temp. u20 1 1 1 1 1 1 1 1 1 1 Superheat across evaporator u21 1 1 1 1 1 1 1 1 1 1 Reference of superheat control u22 1 1 1 1 1 1 1 1 1 1 Opening degree of AKV valve ** u23 1 1 1 1 1 1 1 1 1 1 Evaporating pressure Po (relative) u25 1 1 1 1 1 1 1 1 1 1 Evaporator temperature To (Calculated) u26 1 1 1 1 1 1 1 1 1 1

Temperature measured with S6 sensor

u36 1 1 1 1 1 1 1 1 1

(product temperature)

Status on DI2 output. on/1=closed

Air temperature . Weighted S3 and S4

Measured temperature for alarm thermostat

Status on relay for cooling

Status on relay for fan

Status on relay for defrost

Status on relay for railheat

Status on relay for alarm

Status on relay for light

Status on relay for valve in suction line

Status on relay for compressor 2

Temperature measured with S5B sensor

Status on relay for hot gas- / drain valve ** u80 1

Status on relay for heating element in drip tray

Status on relay for night blinds ** u82 1 Status on relay for defrost B ** u83 1

Status on relay for heat function

u37 1 1 1 1 1 1 1 1 1 1 u56 1 1 1 1 1 1 1 1 1 1

u57 1 1 1 1 1 1 1 1 1 1 ** u58 1 1 1 1 ** u59 1 1 1 1 1 1 1 1 1 1 ** u60 1 1 1 1 1 1 1 1 1 ** u61 1 1 1 1 1 1 1 ** u62 1 1 1 1 1 ** u63 1 1 1 1 1 1 1 1 ** u64 1 ** u67 1

u75 1

** u81 1

** u84 1

Readout of the actual rail heat eect u85 1 1 1 1 1 1 1 1: Thermostat 1 operating, 2: Thermostat 2 operating u86 1 1 1 1 1 1 1 1 1 1 Status on high voltage input DI3 u87 1 1 1 1 1 1 1 1 1 1 Readout of thermostats actual cut in value u90 1 1 1 1 1 1 1 1 1 1 Readout of thermostats actual cut out value u91 1 1 1 1 1 1 1 1 1 1 Readout of status on the adaptive defrost

U01 1 1 1 1 1 1 1 1 1 1

0: O. Function is not activated 1: Error. A reset must be carried out using d22 2: Reset is activated. New tuning is in progress 3: Normal 4: Light build-up of ice 5: Medium build-up of ice 6: Heavy build-up of ice

*) Can only be set when regulation is stopped (r12=0) **) Can be controlled manually, but only when r12=-1 ***) With access code 2 the access to these menus will be limited

Factory setting If you need to return to the factory-set values, it can be done in this way:

- Cut out the supply voltage to the controller

- Keep upper and lower button depressed at the same time as you reconnect the supply voltage

Connections

Overview of outputs and applications.

See also electrical diagrams earlier in the manual

DI1

Digital input signal. The dened function is active when the input is short-circuited/ opened. The function is dened in o02.

DI2

Digital input signal. The dened function is active when the input is short-circuited/ opened. The function is dened in o37.

Pressure transmitter or temperature sensor S1

Pe / AKS 32R (pressure measurement recommended)

Connect to terminal 30, 31 and 32. (Used cable 060G1034: Black=30, Blue=31, Brown=32) The signal from one pressure transmitter can be received by up to 10 controllers. But only if there are no signicant pressure decreases between the evaporators to be controlled. See drawing page 34.

S1 (correct location is important to ensure correct measurements)

Pt 1000 ohm sensor Connect to terminal 31 and 32.

Pt 1000 ohm sensor

S3, S4, S5, S6

Pt 1000 ohm sensor or PTC 1000 ohm sensor. All have to be of the same type.

S3, air sensor, placed in the warm air before the evaporator S4, air sensor, placed in the cold air after the evaporator

(the need for either S3 or S4 can be deselected in the conguration)

S5, defrost sensor, placed on the evaporator

Application DO1 DO2 DO3 DO4 DO5 DO6 DI1 DI2 DI3 AI1 AI2 AI3 AI4 AI5 AI6

• • •

suction

Blinds

heat

hotgas

2 1

• • •

S6, product sensor or defrost sensor B or air sensor B.

The conguration determines which.

EKA Display

If there is be external reading/operation of the controller, display type EKA 163B or EKA 164B can be connected.

RS485 (terminal 51, 52, 53)

For data communication, but only if a data communication module is inserted in the controller. The module can be a LON RS485, DANBUSS or a MODBUS. Terminal 51 = screen Terminal 52 = A (A+) Terminal 53 = B (B-) (For LON RS485 and gateway type AKA 245 the gateway must be version 6.20 or higher.)

RJ45

For data communication, but only if a TCP/IP module is inserted in the controller. (OEM specic)

MODBUS

For data communication. Terminal 56 = screen Terminal 57 = A+ Terminal 58 = B(Alternatively the terminals can be connected to an external display type EKA 163A or 164A, but then they cannot be used for data communication. Any data communication must then be carried out by one of the other methods.)

P0/S1 S2 S3 S4 S5 S6

P0/S1 S2 S3 S4 S5 S5B

P0/S1 S2 S3 S4 S5 S3B

Supply voltage

230 V a.c.

DO1

Connection of expansion valve type AKV or AKVA. The coil must be a 230 V a.c. coil.

DO2

Alarm

There is a connection between terminal 7 and 8 in alarm situations and when the controller is without power.

Rail heat and heating element in drip tray

There is connection between terminal 7 and 9 when heating takes place.

Night blind

There is connection between terminal 7 and 9 when the night blind is up.

Suction line valve

There is connection between terminal 7 and 9 when the suction line must be open.

DO3

Refrigeration, Rail heat, Heat function, Defrost 2

There is connection between terminal 10 and 11 when the function must be active.

Heating element in drip tray

There is connection between terminal 10 and 11 when heating takes place.

DO4

Defrost

There is connection between terminal 12 and 14 when defrosting takes place.

Hot gas / drain valve

There is connection between terminal 13 and 14 during normal operation. There is connection between terminal 12 and 14 when the hot gas valves must open.

DO5

Fan

There is connection between terminal 15 and 16 when the fan is on.

Coordinated defrost via cable connections

DO6

Light relay

There is connection between terminal 17 and 18 when the light must be on.

Rail heat, Compressor 2

There is connection between terminal 17 and 19 when the function must be active.

DI3

Digital input signal. The signal must have a voltage of 0 / 230 V AC. The function is dened in o84.

Data communication

If data communication is used, it is important that the installation of the data communication cable is performed correctly. See separate literature No. RC8AC…

Electric noise

Cables for sensors, DI inputs and data communication must be kept separate from other electric cables:

- Use separate cable trays

- Keep a distance between cables of at least 10 cm

- Long cables at the 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, for example, could still present problems. Electronic controls are no substitute for normal, good engineering practice. Danfoss will not be responsible for any goods, or plant components, damaged as a result of the above defects. It is the installer's responsibility to check the installation thoroughly, and to 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.

Max. 10

The following controllers can be connected up in this way: EKC 204A, AK-CC 210, AK-CC 250, AK-CC 450, AK-CC 550,

Refrigeration is resumed when all controllers have “released” the signal for defrost.

Coordinated defrost via data communication

The setting of controllers to coordinate their defrosting takes place in the gateway/system manager.

Refrigeration is resumed when all controllers have “released” the signal for defrost.

Data

Supply voltage 230 V a.c. +10/-15 %. 5 VA, 50/60 Hz

Sensor S2, (S1) Pt 1000

Sensor S3, S4, S5, S6

Accuracy

Measuring of Pe

Display LED, 3-digits

External display EKA 163B or 164B. (any EKA 163A or 164A)

Digital inputs DI1, DI2

Digital input DI3 230 V a.c.

Electrical connection cable

Solid state output

Relays*

Pt 1000 or PTC 1000 ohm (All 4 must be of the same type)

Measuring range -60 to +120°C

Controller

Pt 1000 sensor

Pressure transmitter

Signal from contact functions Requirements to contacts: Gold plating Cable length must be max. 15 m Use auxiliary relays when the cable is longer

Max.1.5 mm2 multi-core cable

DO1 (for AKV coil)

DO3, DO4 4 (3) A

±1 K below -35°C ±0.5 K between -35 to +25°C ±1 K above +25°C

±0.3 K at 0°C ±0.005 K per grad

AKS 32R

Max. 240 V a.c. , Min. 28 V a.c. Max. 0.5 A Leak < 1 mA Max. 1 pcs. AKV (2 pcs. if EEC coils are used)

CE (250 V a.c.)

AKV info !!

DO2, DO5, DO6 4 (3) A

0 to +55°C, During operations

Environments

Density IP 20

Mounting DIN-rail or wall

Weight 0.4 Kg

Data communication

Power reserve for the clock

Approvals EU Low Voltage Directive and EMC demands re CE-

* DO3 and DO4 are 16 A relays. DO2, DO5 and DO6 are 8 A relays. Max. load must be observed.

Capacitive load

The relays cannot be used for the direct connection of capacitive loads such as LEDs and on/o control of EC motors. All loads with a switch mode power supply must be connected with a suitable contactor or similar.

-40 to +70°C, During transport

20 - 80% Rh, not condensed

No shock inuence / vibrations

Fixed MODBUS

LON RS485

Extension options

The controller cannot be hooked up with a monitoring unit type m2.

4 hours

marking complied with LVD tested acc. EN 60730-1 and EN 60730-2-9, A1, A2 EMC tested acc. EN50082-1 and EN 60730-2-9, A2

DANBUSS

TCP/IP

MODBUS

230 V a.c. coil

AKS 32R info

The signal from one pressure transmitter can be received by up to ten controllers.

Ordering

Type Function Code no.

AK-CC 550

EKA 175 Data communication module LON RS 485 084B8579

EKA 178B Data communication module MODBUS 084B8571

EKA 176 Data communication module DANBUSS + gateway 084B8583

EKA 176A Data communication module DANBUSS + AK-PI 200 084B8591

EKA 163B External display with plug for direct connection 084B8574

EKA 164B

EKA 163A External display with screw terminals 084B8562

EKA 164A External display with operation buttons and screw terminals 084B8563

Case controller with MODBUS data communication Sensor connections are with screw terminals

External display with operation buttons and plug for direct connections

084B8020

084B8575

Examples of order

Installation Data communication Connection Code no.

MODBUS 084B8020 (AK-CC 550)

LON 084B8020

DANBUSS 084B8020

MODBUS 084B8020

LON / DANBUSS 084B8020

084B8579

084B8583

084B8574 (Display) 084B7299 (Cable, 6 m)

084B8574 (Display) 084B7299 (Cable, 6 m) 084Bxxxx (Data module)

L < 15 m

MODBUS / LON / DANBUSS 084B8020

L > 15 m

084B8562 (Display) 084Bxxxx (Data module)

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alternations can be made without subsequential changes being necessary in specications already agreed. All trademarks in this material are property of the respecitve companies. Danfoss and Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

ADAP-KOOL®

Danfoss AK-CC 550 User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Operation

Applications

Survey of functions

Operation

Menu survey

Connections

Data

Ordering