202A

202B

202C

0: Stopped

1: Running during the whole phase

2: Running during the heating phase only

central plant choose 20 K (=off)

0=OFF

0=OFF

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=change reference (r40 will be activated) 8=alarm function when closed. 9=alarm func-

tion when open. 10=case cleaning (pulse signal). 11=Inject off when open.

1=ON during day operation. 2=ON / OFF via data communication. 3=ON follows the DI-

function, when DI is selected to door function or to door alarm

Alarm

Alarm

r12=-1)

input

played. There is stop based on time

defrost

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 r03.

The reference at any time can be seen in ”u28 Temp. ref”

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.

The controller’s setting range for the set point may be narrowed down, so that much too high or much too low values are not set accidentally – with resulting damages.

If the temperature at the products and the temperature received by the controller are not identical, an offset adjustment of the shown display temperature can be carried out.

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

°C=0. / °F=1

(Only °C on AKM, whatever the setting)

Compensation possibility through long sensor cable

With this setting refrigeration can be started, stopped or a manual override of the outputs can be allowed.

Start / stop of refrigeration can also be accomplished with the external switch function con- nected to the DI input.

Stopped refrigeration will give a ”Standby alarm”.

1: Start

0: Stop

-1: Manual control of outputs allowed

The thermostat’s reference will be the set point plus this value when the controller changes over

to night operation. (Select a negative value if there is to be cold accumulation.)

When the function is changed to ON the thermostat differential will be increased by the value in r40. Activation can also take place via input DI (defined in o02).

The thermostat reference and the alarm values are shifted by the following number of degrees

when the displacement is activated. Activation can take place via r39 or input DI

(start of night signal)

If one of the two limit values is exceeded, a timer function will commence. The alarm will not

become active until the set time delay has passed. The time delay is set in minutes.

The time delay is set in minutes.

The function is defined in o02.

This time delay is used during start-up, during defrost, and immediately after a 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.

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.

The limit value will also be raised in connection with reference displacement r39.

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

The limit value will also be raised in connection with reference displacement r39.

A cut-out/cut-in input will result in alarm when the time delay is passed. The function is defined

in o02.

If the S5 sensor is used for monitoring the condenser’s temperature you must set the value at which the alarm is to become activated. The value is set in °C.

The definition of S5 as a condenser sensor is accomplished in o70. The alarm is reset again to 10 K

below the set temperature.

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 to be stopped?

The running times are not observed when defrosts start.

0: Normal function where the relay cuts in when refrigeration is demanded

1: Reversed function where the relay cuts out when refrigeration is demanded (this wiring pro-

duces the result that there will be refrigeration if the supply voltage to the controller fails).

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 a safety defrost if one of the subsequent defrost starts is not received.

The controller also contains a real-time clock. By means of the settings of this clock and times for the required defrost times, defrost can be started at fixed times of the day. If there is a risk of power failure for periods longer than four hours, a battery module should be mounted in the controller. Defrost start can also be accomplished via data communication, via contact signals or manually

start-up.

Defrost can be accomplished with electricity, hot gas or brine.

The actual defrost will be stopped based on time or temperature with a signal from a temperature sensor.

Here you set whether defrost is to be accomplished with electricity or “non”. During defrost the defrost relay will be cut in.

When gas defrosting the compressor relay will be cut in during defrost.

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.

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 a 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.

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 will be the defrost time if d10 is selected to be 0)

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.

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).

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).

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.

Here you can set whether the fan is to operate during defrost. 0: Stopped (Runs during pump down)

1: Running during the whole phase

2: Running during the heating phase only. After that stopped

Here you define the defrost sensor. 0: None, defrost is based on time 1: S5

2: Sair

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.

The controller will follow the effectivity of the evaporator, and via internal calculations and measurements of the S5 temperature it will be able to start a defrost when the variation of the S5 temperature becomes larger than required.

Here you set how large a slide of the S5 temperature can be allowed. When the value is passed, a defrost will start.

The function can only be used in 1:1 systems when the evaporating temperature will become lower to ensure that the air temperature will be maintained. In central systems the function must be cut out.

With setting = 20 the function is cut out

Here you can start a manual defrost.

Shows ON when the controller is operating with coordinated defrost.

1= pump down / defrost

Here you can select whether the fan is to be stopped when the compressor is cut out

(Yes = Fan stopped)

If you have chosen to stop the fan when the compressor is cut out, you can delay the fan stop when the compressor has stopped.

Here you can set the time delay.

The function stops the fans in an error situation, so that they will not provide power to the appli- ance. 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.

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. When mounting a battery module the clock function can preserved longer.

(EKC 202 only)

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.

The controller has a digital input 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 will be resumed.

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. 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 place. OFF.

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

7) Reference displacement when DI1 is short-circuited. Displacement with “r40”.

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

9) Separate alarm function. An 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. Cf. also description on page 4.

11) Inject on/off. Off when DI is open.

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.

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.

The installation of the data communication cable has been mentioned in a separate document, “RC8AC”.

The address is set between 1 and 240, gateway determined

The address is sent to the system manager when the menu o04 is set to ‘ON’, or when the system manager’s scanning function is activated. (o04 is only to be used if the data communication is LON.)

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).

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 or an NTC sensor (5000 Ohm at 25°C).

All the mounted sensors must be of the same type.

PTC = 1

NTC = 2

Yes: Gives steps of 0.5°

No: Gives steps of 0.1°

When a controller has completed a defrost, it will wait for a signal that tells the refrigeration may be resumed. If this signal fails to appear for one reason or another, the controller will

itself starts the refrigeration when this standby time has elapsed.

1) The relay cuts in during day operation

2) The relay to be controlled via data communication

3) The relay to be controlled by the door switch defined in either o02 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.

The light relay can be activated here (if 038=2)

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 Off.

2 = Cleaning with stopped fans. All outputs are Off.

If the function is controlled by a signal at the DI input, the relevant status can be seen here in the

menu.

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.

With this function, the controller’s settings can be transferred to a programming key. The key can contain up to 25 different sets. Select a number. All settings except for Address (o03) will be copied. When copying has started, the display returns to o65. After two seconds, you can move into the menu again and check whether the copying was satisfactory.

Showing of a negative figure spells problems. See the significance in the Fault Message section.

This function downloads a set of settings previously saved in the controller. Select the relevant number.

All settings except for Address (o03) will be copied. When copying has started the display returns to o66. After two seconds, you can move back into the menu again and check whether the copying was satisfactory. Showing of a negative figure spells problems. See the significance

in the Fault Message section.

With this setting you save the controller’s actual settings as a new basic setting (the earlier fac-

tory settings are overwritten).

Maintain the setting at 0 if the sensor has been defined as defrost sensor in D10. If D10 has been set at 0 or 2 the S5 input can be used as product sensor or condenser sensor. Here you define which:

0: Defrost sensor

1: Product sensor

2: Condenser sensor with alarm

Here you define the application for relay 4: 1: Defrost (EKC 202A) or Light (EKC 202C) 2: Alarm

1=Night

There are two kinds of error reports – it can either be an alarm occurring during the daily opera- tion, 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:

1 = alarm

0: Copying concluded and OK

4: Copying key not correctly mounted

5: Copying was not correct. Repeat copying 6: Copying to EKC incorrect. Repeat copying

7: Copying to copying key incorrect. Repeat copying

8: Copying not possible. Order number or SW version do not match 9: Communication error and timeout

10: Copying still going on

(The information can be found in o65 or o66 a couple of seconds after copying has been

started).

Function via data communication

Functions to be used in the gateway’s override function

– – – HoldAfterDef u60 Def.relay

Day/night control Time schedule

PTC 1000 or

NTC-M2020 (5000 ohm / 25°C)

Accuracy

Controller

±0.5 K between -35 to +25°C

±1 K above +25°C

sensor

±0.005 K per grad

Digital inputs

Use auxiliary relays when the cable is longer

Max. 1 mm² on sensors and DI inputs

Relays*

Environments

-40 to +70°C, During transport

Buttons and packing are embedded in the front.

4 hours

Approvals

EKC 202: UL approval acc. UL 60730

LVD tested acc. EN 60730-1 and EN 60730-2-9, A1, A2

EMC tested acc. EN 61000-6-3 and EN 61000-6-2