Danfoss AK-CC 525A User guide

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User Guide

Controller for appliance control

AK-CC 525A

ADAP-KOOL® Refrigeration control systems

Introduction

Application

Complete refrigeration appliance control.

Advantages

• Energy optimisation of the whole refrigeration appliance

• Quick set-up with predeﬁned 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 ﬂow before the evaporator (S3) or after the evaporator (S4) respectively. A setting for thermostat, alarm thermostat and display reading determines the inﬂuence the two sensor values should have for each individual function. 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.

Functions

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

• Switch between thermostat settings via digital input

• Adaptive control of superheat

• Start of defrost via schedule, digital input or network

• Natural or electric defrost

• Stop of defrost on time and/or temperature

• Coordination of defrosting among several controls

• Pulsing of fans when thermostat is satisﬁed

• Door function

• Light control

• Factory calibration that will guarantee a better measuring accuracy than stated in the standard EN 13485 without subsequent calibration (Pt 1000 ohm sensor)

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

Appliance examples

Application

The controller can be set so that relay DO3 is used for one of the

following functions:

• Cooling Here the relay is active when cooling is necessary.

• Rail heat Here the relay controls the eﬀect to the rail heat.

DO3

Contents

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

Regulating functions ....................................................................................... 3

Survey of functions .......................................................................................... 9

Operation .......................................................................................................... 19

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Menu survey .....................................................................................................20

Connections ..................................................................................................... 24

Data ..................................................................................................................... 26

Ordering ............................................................................................................27

Regulating functions

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:

• Pressure sensor Po 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 signiﬁcant pressure diﬀerence between the evaporators in question.

Temperature control

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

The actual temperature control can take place in two ways: as an ordinary ON/OFF regulation with a diﬀerential, 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 inﬂuence the alarm monitoring. Minimum and maximum limits can be set for alarm temperature and time delays. A longer time delay can be set for high temperature alarm. This time delay is active after defrosting and start-up.

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Thermostat displacement

Thermostat displacement can be used beneﬁcially for appliances where diﬀerent product types are stored which require diﬀerent temperature conditions. It is possible to change between two different thermostat settings via a contact signal on a digital input. During a thermostat displacement, the alarm limits will be displaced accordingly.

Night setback of thermostat value

In refrigeration appliances there may be big load diﬀerences 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 eﬀect 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.

• Alarm limits are not displaced during night operation.

Appliance shut-down

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

Defrost

Depending on the application you may choose between the following defrost methods: Natural: Here the fans are kept operating during the defrost Electric: The heating element is activated Gas: Simple hotgas defrost where compressor is running

during defrost.

Defrost sequence

1) Pump down

2) Defrost

3) Waiting position after defrost (coordinated defrost only)

4) Drip oﬀ

5) Delay of fan

Start of defrost

A defrost can be started in diﬀerent ways Interval: Defrost is started at ﬁxed 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 ﬁxed refrigeration time

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

Schedule: Here defrost can be started at ﬁxed 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 Manual: An extra defrost can be activated from the display lower-

most button or via parameter setting

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.

Defrost on demand

1 Based on refrigeration time

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

Max. 10

System manager

Melting function

This function will stop the air ﬂow in the evaporator from being reduced by frost created by uninterrupted operation for a long time. The function is activated if the thermostat temperature has remained in the range between -5°C and +10°C for a longer period than the set melting interval. The refrigeration will then be stopped during the set melting period. The frost will be melted so that the air ﬂow and hence the evaporator’s capacity will be greatly improved.

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.

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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 period (appliance with night lid)

(The function is not actual when r14=2, i.e. modulating regulation).

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

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.

Period time

The light function can be deﬁned in three ways:

- the light is controlled via a signal from a door contact. Together with this function a time delay can be set so that the light is kept 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 oﬀ when "r12" (Main switch) is set to oﬀ (see o98).

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 displacement

- General alarm monitoring

- Case shut down

- Coordinated defrost (DI2 only)

- Forced closing of valve (DI 3 only)

Function Input/Settings menu Setting

DI1 DI2 DI3

o02 o37 o84

Not used + + + 0

Follows DI’s status + + + 1

Door contact function + + + 2

Door alarm + + + 3

Start defrost + + + 4

Main switch + + + 5

Nighttime operation + + + 6

Thermostat displacement + + + 7

DI alarm when closed + + 8

DI alarm when open + + 9

Coordinated defrost + 13

Forced close + 14

Case shutdown + + + 15

Example If DI1 is used to start a defrost cycle, o02 must be set to 4.

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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. Otherwise, the defrost cycle is stopped immediately once the signal is received. The function is deﬁned in o90. The signal can be received from the DI3-input or via the data communication. During a forced closing the fans can be deﬁned to be stopped or in operation.

Door contact

The door contact function can via the digital inputs be deﬁned for two diﬀerent 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.

Railheat (o61=2)

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

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.

During defrosting

During defrosting rail heat will be active, as selected in setting d27.

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Data communication

The controller has ﬁxed built-in MODBUS data communication.

If there is a requirement for a diﬀerent 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 AKA 245 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 m, the connection must take another form. An extra module must also be mounted in the controller if data

! Address o03 > 0

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 ﬁxed 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 525A

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.

P0 optimization P0 Optimization The controller supports P0 optimization

Case shutdown Day/night control / Time schedule --- Case shutdown

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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 r- - 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".

Diﬀerential

When the temperature is higher than the reference + the set diﬀerential, 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 oﬀset 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 deﬁned how the thermostat is to operate. Either as an ordinary ON/OFF thermostat or as a modulating thermostat. 1: ON/OFF thermostat 2: Modulating

Parameter by operation via data communication

Display air (u56)

r00 Cutout °C

r01 Diﬀerential

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 oﬀset

r14 Therm. mode

When operation is ”modulating” the AKV valve will limit the ﬂow of refrigerant so that the temperature variation will be less than for the ON/OFF thermostat. The diﬀerential (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 deﬁne 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.

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r15 Ther. 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).

r16 MeltInterval

Melt period

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

Thermostat displacement

The thermostat reference can be displaced in a positive or negative direction when a signal is received on a DI input. The value is set in Kelvin. When the reference displacement is active, the two alarm limits, A13 and A14, will be displaced accordingly.

Alarm A- - Alarm settings

The controller can give alarm in diﬀerent situations. When there is an alarm all the light-emitting diodes (LED) will ﬂash on the external display, 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 deﬁned in o02 , o37 or in o84.

Time delay for cooling (long alarm delay) This time delay is used during start-up and during defrost. 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).

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 deﬁned 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 deﬁned in o37

Signal to the alarm thermostat Here you have to deﬁne 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

Compressor c- - 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. Oﬀ time The LED on the display will show whether refrigeration is in progress. u58 comp7/LLSV

r17 Melt period

r40 Th. oﬀset K

Night setbck (start of nightsignal. 0=Day, 1=Night)

Forced close (Forced stop of cooling)

With data communication the importance of the individual alarms can be deﬁned. 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

A27 AI.Delay DI1

A28 AI.Delay DI2

A36 Alarm S4%

Reset alarm

Here you can read the status of the compressor relay.

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Defrost d- - 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 ﬁrst 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 ﬁxed 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 diﬀerent functions have to be set, so that multiple defrosts are avoided. 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 electrical heaters, hotgas or "Oﬀ".

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 deﬁned in d10).

The temperature value is set.

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 communication 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. (The setting is the defrost time if d10 is set to 0.)

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 ﬁrst defrost taking place when voltage is connected to the controller. The function will be active after each and every power failure.

Drip-oﬀ 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 oﬀ the evaporator).

d01 Def. method

0 = Oﬀ 1 = El 2 = Gas

d02 Def. Stop Temp

d03 Def Interval

(0=oﬀ)

d04 Max Def. time

d05 Time Stagg.

d06 DripOﬀ 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.

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d07 FanStartDel

d08 FanStartTemp

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 deﬁne the defrost sensor. 0: None, defrost is based on time 1: S5 2: S4

Pumpdown delay

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

Rail heat during defrost 0=oﬀ. 1=on. 2=Pulsating

Max. duration of -d- in the display

Controls the readout of "-d-" after defrost, thus "-d-" is shown until the temperature is ok, set delay has expired, or a temperature alarm will occur.

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

Fan F- - 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 external display will indicate whether a defrost is going on.

Parameter for cooling function n- - 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

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 ﬂuctuates a lot and in line with the opening of the AKV valve.

d09 FanDuringDef

d10 DefStopSens.

d16 Pump dwn del.

d18 MaxTherRunT

d27 Railh. at def.

d40 Disp. d del.

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

F04 FanStopTemp.

F05 FanPulseMode

F06 Fan cycle

F07 Fan ON %

n11 MOP temp

(A value of 15 corresponds to OFF)

n13 AKV Period

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Miscellaneous o- - 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: Oﬀ: 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 displacement.

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)

15) Case shut down when the input is activated.

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 Conﬁg.

Deﬁnition takes place with the numerical value shown to the left.

(0 = oﬀ)

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 (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

Normally a Pt 1000 sensor with great signal accuracy is used. But you can also use a PTC 1000 sensor with another signal accuracy. All the mounted sensors S3-S5 must be of the same type.

Local readout of software version o08 SW version

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 deﬁne 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 deﬁned. 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=Userdeﬁned. 14=R32. 15=R227. 16=R401A. 17=R507. 18=R402A. 19=R404A. 20=R407C. 21=R407A. 22=R407B. 23=R410A. 24=R170. 25=R290. 26=R600. 27=R600a. 28=R744. 29=R1270. 30=R417A. 31=R422A. 32=R413A. 33=R422D. 34=R427A. 35=R438A. 36=R513A. 37=R407F.

38=R1234ze. 39=R1234yf. 40=R448A. 41=R449A. 42=R452A.

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 SensorConﬁg

Pt = 0 PTC = 1

o16 Max HoldTime

o17 Disp. S4%

o20 MinTransPres

o21 MaxTransPres

o30 Refrigerant

AK-CC 525A Manual RS8HB302 © Danfoss 2016-07 13

Digital input signal - D2

The controller has a digital input 2 which can be used for one of the following functions: Oﬀ: 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 displacement

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.

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

15) Case shut down when input is activated.

Conﬁguration 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, deﬁned 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 oﬀ.

4) As "2" but if there are any 15-minute network errors, the light will switch on.

Activation of light relay

The light relay can be activated here, but only if deﬁned 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

Selection of application

The controller can be deﬁned in various ways. Here you set which of the 2 applications is required.

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 19.

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

o37 DI2 conﬁg.

o38 Light conﬁg

o39 Light remote

o41 Railh.ON day%

o42 Railh.ON ngt%

o43 Railh. cycle

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 conﬁguration 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).

14 Manual RS8HB302 © Danfoss 2016-07 AK-CC 525A

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: Oﬀ: 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 operation.

7) Thermostat displacement

14) Cooling stopped with the function "Forced closing"

15) Case shut down when the input is activated.

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).

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.

Defrosting and fan operation during forced closing

You can set whether fans should be operational or stopped if the function “Forced closing” is activated here. 0: The fans will be stopped and defrosting will be permitted. 1: The fans will run and defrosting will be permitted. 2: The fans will be stopped and defrosting will not be permitted during a forced closing. 3: The fans will run and defrosting will not be permitted during a forced closing.

Light deﬁnition

0: Light is switched oﬀ when the main switch is oﬀ 1: Light is independent of main switch.

Conﬁguration of 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 enabled for alarm 16 - Defrosting 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 error and will cancel relay function

Internal defrosting schedule/clock function t- (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 Clock: Year setting t47

o84 DI3 conﬁg.

o85 Railh. mode

o89 DoorInjStart

o90 Fan ForcedCl

o98 Light MS = Oﬀ

P41 Al.Rel. Conf.

t11-t16

Case shut down

AK-CC 525A Manual RS8HB302 © Danfoss 2016-07 15

Service u- - 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/oﬀ) 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 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 Status on DI2 output. on/1=closed Air temperature. Weighted S3 + S4 u56 Display air Measured temperature for alarm thermostat u57 Alarm air 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

Readout of the actual rail heat eﬀect in %

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

u11 Defrost time

u18 Ther runtime

u37 DI2 status

u85 Rail DutyC %

u87 DI3 status

u90 Cutin temp.

u91 Cutout temp.

16 Manual RS8HB302 © Danfoss 2016-07 AK-CC 525A

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 brieﬂy (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 oﬀ 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 Delay on outputs during start-up S32 32 Case shut down S45 45

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 is still above

-d-

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

*) Emergency cooling will take eﬀect when there is lack of signal from a deﬁned S3 or S4 sensor or signal from the pressure transmitter is outside signal

range. The regulation will continue with a registered average cutin frequency. There are two registered values – one for day operation and one for night operation.

AK-CC 525A Manual RS8HB302 © Danfoss 2016-07 17

Fault message

In an error situation the LED’s on the display will ﬂash 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.

A15/--- DI1 alarm DI1 alarm 8

A16/--- DI2 alarm DI2 alarm 8

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

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

E6/--- RTC error Check clock 32

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

E24/--- S2 error

E25/--- S3 error

E26/--- S4 error

E27/--- S5 error

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

Data communication

The importance of individual alarms can be deﬁned 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

Error on S2 sensor 4

Error on S3 sensor 4

Error on S4 sensor 4

Error on S5 sensor 4

Settings from AKM (AKM destination)

Log Alarm relay Send via

Non High Low-High

Network

18 Manual RS8HB302 © Danfoss 2016-07 AK-CC 525A

Operation (only external)

External 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)

The LED’s on the external display will light up when the relevant relay is activated. o = Refrigeration

o = Defrost o = Fan running

The light-emitting diodes will ﬂash 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.

Examples

Set menu

1. Push the upper button until a parameter "cfg" is shown

2. Push the upper, middle or the lower button and ﬁnd 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.

Get a good start

With the following procedure you can start regulation very quickly:

cFg (System settings) 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 the min. range for the pressure transmitter (o20)

3 Select the max. range for the pressure transmitter (o21)

4 Select refrigerant (o30)

5 Set application in o61: DO3 = Cooling or Rail heat.

6 Now select one of the preset settings from the table

Auxiliary schedule for settings (quick-setup)

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 conﬁg. (o02)

Sensor signal for display view S4% (017)

Case Room

Defrost stop on Defrost stop on

time S5 time S5

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

100% 0%

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

- Door function (=2)

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

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

8 For network. Set the address in o03

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

9 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

stack.

10 Open parameter r12 and start the regulation

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.

(Menu groups) 11 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.

Reading the temperature at defrost sensor

• A short press of the lower button

Manuel start or stop of a defrost

• Push the lower button for four seconds.

Menu survey

Password

Temperature PS cFg

out

Conﬁguration

➞

Service

ALA S2 o30 Refrigerant type

Service

System settings

r12 Main switch

o20 Min. transmitter range

tE o21 Max. transmitter range

A-- rHt / CoP S3 o61 Relay DO3 function

c-- dEF S4 o62 Preset settings

d-- FAn S5 o03 Modbus address

f-- Lgt di1 o04 Service pin (for LON only)

n-- ESc

Menu groups

r12 = service (-1)

Read output status. /

Override output when



Read input status

di2 ESc



o-- Return di3 Return

t-- ESc

Connections

DI1 DI2

DO1 DO2 DO3 DO4 DO5 DO6 DI3 (od) (ALA) (CoP) (dEF) (FAn) (Lgt)

DI1

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

DI2

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

Pressure transmitter

AKS 32R

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 signiﬁcant pressure decreases between the evaporators to be controlled.

Pt 1000 ohm sensor

S3, S4, S5

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 conﬁguration)

S5, defrost sensor, placed on the evaporator.

EKA Display

If there is 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.)

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.)

Supply voltage

230 V a.c., 50/60 Hz

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.

DO3

Refrigeration or Rail heat

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

DO4

Defrost

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

DO5

Fan

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

DO6

Light

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

DI3

Digital input signal. The signal must have a voltage of 0 / 230 V a.c.. The function is deﬁned 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 ﬁt 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.

Coordinated defrost via cable connections

Coordinated defrost via data communication

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 550A,

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

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. (115 V a.c.) +10/-15 %. 5 VA, 50/60 Hz

Sensor S2 Pt 1000

Sensor S3, S4, S5

Accuracy

Measuring of Pe

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*

Environments

Density IP 20

Mounting DIN-rail or wall

Weight 0.4 Kg

Data communication

Power reserve for the clock

Approvals

Pt 1000 or PTC 1000 ohm (All 3 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

DO2, DO5, DO6 4 (3) A

0 to +55°C, During operations

-40 to +70°C, During transport

20 - 80% Rh, not condensed

No shock inﬂuence / vibrations

Fixed MODBUS

Extension options

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

4 hours

EU Low Voltage Directive and EMC demands re CEmarking complied with LVD tested acc. EN 60730-1 and EN 60730-2-9, A1, A2 EMC tested acc. EN 61000-6-2 and EN 61000-6-3 UL ﬁle no. E31024

±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.)

UL** (240 V a.c.)

4 A Resistive 3 FLA, 18 LRA

LON RS485

MODBUS

DANBUSS

AKV info !!

(115 V a.c.)

230 V a.c. coil

(115 V a.c.)

AKS 32R info

(only 230 V version))

* DO3 and DO4 are 16 A relays. DO2, DO5 and DO6 are 8 A relays. Max. load must be observed. **) UL-approval based on 30000 couplings.

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

Capacitive load

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

There cannot be a signiﬁcant drop in pressure between the pressure transmitter’s position in the suction line and the S2 temperature in the individual evaporators.

Ordering

Type Function Supply Code no.

AK-CC 525A

Case controller with MODBUS data communication with connection plugs

Case controller with MODBUS data communication without connection plugs (industrial pack 12 pcs.)

Case controller with MODBUS data communication with connection plugs

Bag with 12 set connection plugs 084B8162

230 V

115 V 084B8017

084B8019

084B8119

EKA 175

EKA 178B Data communication module MODBUS 084B8571

EKA 176 Data communication module DANBUSS for Gateway 084B8583

EKA 176A Data communication module DANBUSS for 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

Data communication module LON RS 485

External display with operation buttons and plug for direct connections

084B8579

084B8575

Order examples:

Installation Data communication Connection Code no.

MODBUS 084B8019 (AK-CC 525A)

LON 084B8019

DANBUSS (gateway connection) 084B8019

MODBUS 084B8019

L < 15 m

LON / DANBUSS 084B8019

MODBUS / LON / DANBUSS 084B8019

084B8579

084B8583

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

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

084B8562 (Display) 084Bxxxx (Data module)

L > 15 m

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 specifications 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 525A User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Regulating functions

Survey of functions

Menu survey

Connections

Data

Ordering