Danfoss EKC 201

R E F R I G E R A T I O N A N D A I R C O N D I T I O N I N G

ADAP-KOOL®

Refrigeration control system

Controller for temperature control- EKC 201 and EKC 301

Manual

Refrigeration and Air Conditioning Controls

2 Manual RS.8A.V2.02 © Danfoss 02-2002 EKC 201/EKC 301

Introduction

ApplicationThe controller is a simple thermostat regulator in which somerefrigeration-technical functions have been integrated so thatit can replace a link-up of a group of thermostats and timers.The controller has been specially designed for refrigerationapplications, but may of course also be used for other formsof regulation where this is expedient.

The controller comes in several versions with a growingnumber of functions - from the simple one with just one relayto more advanced versions with three relays. All versions arefurthermore available with an alarm function. The number ofrelays will then be increased by one.

The relays are used for controlling:- compressor- fan- defrost- alarm

One of the connections to the controller is a digital input. Thisinput will register the position of a connected switch anddepending on the functions you want to use, it will work, asfollows:- activate a door alarm if the door remains open for longer

than allowed- start a defrost- or transmit the signal to the data communication

Advantages• One electronic controller is able to replace several tradi-

tional controllers and defrost clocks

• Can be supplied for panel as well as DIN-rail mounting

• Temperatures, times, operating conditions, parametercodes and alarm and fault codes can be read from thedisplay

• Three LEDs indicate the actual condition of the system:- refrigeration- defrost- fan running

• Easy to re-establish factory setting

• In the event of error function, the actual parameter code canbe displayed

• All alarms are indicated bya the three LEDs fashing at once

• Easy to install data communication at a later date

Accessories

The controller can be extended by one insertion module if theapplication warrants it.The controller comes prepared with plug and terminals, so allyou have to do is to push the module into place.

If you want to change theperiodical defrost, so that it canbe performed at specific times ofthe day, a clock module may befitted.

Up to six defrost cycles per daycan now be set. The module isprovided with battery backup.(Type = EKA 172)

If it is required that operation is totake place from a PC, a datacommunication module must beplaced in the controller.Two types of insertion modulesfor data communication can behad - they are LON modules withFFT10 interface or RS485interface.

For ForEKC 201 EKC 301

For ForEKC 201 EKC 301

EKC 201/EKC 301 Manual RS.8A.V2.02 © Danfoss 02-2002 3

Controller application overview

Example: Controller for application number 3 satisfiesrequirement for

• room temperature control (thermostat) by pump down orcompressor start/stop.

• time controlled defrost using hot gas or electricity

• fan motor control

noitcnuF.onnoitacilppA

1 2 3 4

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htiwtsorfeddellortnocerutarepmeTsagtohroyticirtcele

htiwtsorfeddellortnoc-emiTsagtohroyticirtcele

lortnocrotomnaF

Room temperature control by pump down.Natural defrost on pump down.

Application no. 1

Room temperature control by compressor start/stop.Natural defrost on compressor stop.

Application no. 2

Application no. 3

Application no. 4

Room temperature control by pump down.Temperature-controlled electric defrost.

Room temperature control by compressorstart/stop.Temperature-controlled electric defrost.

Room temperature control by pump down.Temperature-controlled hot gas defrost.

Room temperature control by compressorstart/stop.Time-controlled electric defrost.

Room temperature control by pump down.Time-controlled electric defrost.

Room temperature control by pump down.Time-controlled hot gas defrost.

Room temperature control by compressorstart/stop.Temperature-controlled electric defrost.

Room temperature control by pump down.Temperature-controlled hot gas defrost.

Room temperature control by pump down.Temperature-controlled electric defrost.


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Data

EKC 201 for panel mounting Weight: 150 g

EKC 301 for DIN-rail mounting Weight: 300 g

Transformer

* AC 15 load to EN 60947-5-1** Gold plating ensures make function with small contact loads

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Electrial connection

Application 1without alarm relay

Application 2without alarm relay

Application 3 and 4without alarm relay

12 V

230 V

12 V

12 V

230 V

230 V

230 V

Panel version DIN version


Application 1with alarm relay

Panel version DIN version

Application 2with alarm relay

Application 3 and 4with alarm relay

12 V

230 V

12 V

12 V

230 V

230 V

230 V

60 Hz:If the net frequency is 60 Hz there will be the following limitations:

EKC 201, 12 V: - Cable length between transformer and EKC must be max. 1 m.- Nothing but the EKC must be connected to the transformer's secondary side- Cable length between sensors and EKC must be max. 100 m

EKC 301: - Cable length between sensors and EKC must be max. 100 m


Light-emitting diodes on the frontplateThere are up to three LED’s on thefront plate. They signify the following:

refrigeration

defrost

fan operating

ButtonsIf you want to change a setting, the twobuttons will give you a higher or lowervalue depending on which button youpush. But before you can change thevalue, you require access to the menu.

DisplayThe values are displayed with threedigits and by means of a setting youcan decide whether they are to beshown in °C or °F.

Operation

You obtain it by pushing the top buttonfor a couple of seconds -you will thenenter into the row of parameter codes.Find the parameter code you want tochange and then push the two buttonssimultaneously.When you have changed the value,save the new value by pushing the twobuttons simultaneously once more.

Briefly:

gives access to the menu

gives access to changing of values

saves a change

Temperature settingIf it is the temperature setting you wantto change, do not enter into the menu.Just push the two buttonssimultaneously, and you will be able tochange the temperature referencewhen the display responds by flashing.

Examples of operations

See the temperatur at the othercontrols sensor1. Push the two buttons simultaneously

See the temperatur at the defrostsensor1. Push the lower button

Set of a menu1. Push the upper button until a

parameter is shown2. Push one of the buttons and find the

parameter you want to change3. Push both buttons simultaneously

until the parameter value is shown4. Push one of the buttons and select

the new value5. Push both buttons again to conclude

the setting

Forced controlIn addition to the normal operation ofthe controller you can carry out anumber of forced control functionswhich you start in the following manner:

- Cut-out of alarm relay / see alarmcode

• Push the upper button

- Reading of defrost sensor’stemperature

• Push the lower button

- Manual start or stop of a defrost• Push the lower button for fourseconds

Operating the two pushbuttonsDisplayreadout

What the controller does automatically

Resultingcontroller

setup

Normaloperation

Room temp. 2

Normaloperation(or alarm)

Knowncodes

and settings

All parametersettings= factorysettings

Normaloperation

Normaloperation

Normaloperation

Alarm relaynot

activated

Alarm

Roomtemp.

Roomtemp.

Setvalue

Change

ChangeChange

Setvalue

Roomtemp.

Roomtemp.

Power off Poweron

Roomtemp.

Roomtemp.

Roomtemp.

Roomtemp.

Roomtemp.

Alarm code/Fault code

Alarm code/Fault code

Room temp.

Room temp.

Defrost operation

Defrost sensor temp.

Whatto do

Initialcontroller

setup

Reador

change roomtemp.setting

Reador changeparameter

codesand

settings

Re-establishall factorysettings

Readdefrostsensortemp.

Manuallystart of

a defrostoperation

Manuallystop of

a defrostoperation

Resetalarmrelay

Read codescause of

alarm mode

Normaloperation

Roomtemp. 1

Normaloperation(or alarm)

Unknowncodes

and settings

Unknownsettings

Normaloperationor alarm

Normaloperation

Defrostoperation

Alarmrelay

activated

Alarm relaynot

activated

Roomtemp.

Roomtemp.

Code

Roomtemp.

Roomtemp.

Roomtemp.

Roomtemp.

Roomtemp.

Roomtemp.


Menu survey

Factory settingIf 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 both buttons depressed at the same time as you reconnect the supply

voltage

Para- Controller Min. Max. Factory ActualSetting and read-off parameters meter application no. value value setting 5) setting

codes 1 2 3 4

Normal operation

Temperature controller, Temperature -60oC 50oC 3oC

Thermostat

Differential1) r01 0.1 K 20 K 2 K

Max. limitation of set temperature r02 -59oC 50oC 50oC

Min. limitation of set temperature r03 -60oC 49oC -60oC

Adjustment of temperature indication r04 -20 K 20 K 0.0 K

Temperature unit (°C/°F) r05 oC

Alarm

Upper deviation (above temp. setting + differential 2) A01 0 K 50 K 10 K

Lower deviation (below temp. setting 2) A02 -50 K 0 K -10 K

Temperature alarm delay A03 0 min 90 min 30 min

Door alarm delay A04 0 min 90 min 60 min

Compressor

Min. ON-time c01 0 min 15 min 0 min

Min. OFF-time c02 0 min 15 min 0 min

Cut-in frequency on sensor fault 3) c03 0 % 100 % 0 %

Compressor stop at open door (yes/no) c04 no

Defrost

Defrost method (EL/GAS) d01 EL

Defrost stop temperature d02 0oC 25oC 6oC

Interval between defrost starts d03 OFF 48 hour 8 hour

Max. defrost duration d04 0 min 180 min 45 min

Defrost time delay (after power up) d05 0 min 60 min 0 min

Drip-off time d06 0 min 20 min 0 min

Fan start delay after defrost d07 0 min 20 min 1 min

Fan start temperature d08 -15oC 0oC -5oC

Fan cut-in during defrost (yes/no) d09 no

Defrost sensor (yes/no) d10 yes

Temperature alarm delay after defrost d11 0 min 199 min 90 min

Delay of display view after defrost stop d12 0 min 15 min 1 min

Defrost at start-up d13 no yes no

Fan

Fan stop on compressor cut-out (yes/no) F01 no

Fan stop delay F02 0 min 30 min 0 min

Fan stop at open door (yes/no) F03 yes

Miscellaneous

Delay of output signal after start-up o01 0 s 600 s 5 s

Digital input signals 4) (0 = not used, 1 = door alarm,2 = defrost, 3 = bus, 4 = Main Switch) o02 0

Access code o05 OFF 100 OFF

Used sensor type (Pt / PTC) o06 Pt/PTC

Real time clock (if fitted)

Six start times for defrost

All can be cut out by setting on OFF t01- t06 0 23 OFF

Hour setting t07 0 hour 23 hour 0 hour

Minute setting t08 0 min 59 min 0 min

Fault code display Alarm code display Status code display

E 1 Fault in controller A 1 High temperature alarm S 2 ON-time

E 2 Disconnected room sensor A 2 Low temperature alarm S 3 OFF-time

E 3 Short-circuited room sensor A 4 Door alarm S 4 Drip-off time

E 4 Disconnected defrost sensor

E 5 Short-circuited defrost sensor

E 6 Change battery + Check clock

Bus: With installed communication card, the position of the SPSTcontacts will be registered in the BUS system.Main Switch: Start/stop control

5) Factory settings are indicated for standard units. Other code numbershave customized settings.

1) The compressor relay closes when the room temperature exceedsthe setting value and differential.

2) Alarm is released and sensor failure is indicated, if the roomtemperature reaches 5°C or more outside the setting range–60° to +50°C.

3) After start-up and throughout three days and nights this value is used bythe controller. Afterwards the controller is capable by itself to calculatethe average value of previous cut-in times.

4) Function possibilities with SPST contact, connected to theterminals 3 and 4 are the following:Door alarm: If SPST is cut out, alarm signalling starts and the fan isstopped, cf. A04 or F03.Defrost: If SPST is cut in, defrost starts. (However, if d03 is not OFF,defrost will during contact break down start with the programmed timeintervalles).


Ordering

Transformer, 230/12 V

Code no. 084B7090

EKC 201, Controllers for panel mounting

EKC 301, controllers for DIN-rail mounting

Accessories

Plug-in modules

*) See installation guide for data communication, RC.8A.C

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Example on menu pictures

Data communication

Example

This page contains a description of a few of the extrafunctions you obtain, if the controller is extended with datacommunication.

Each controller is providedwith an insertion module.

The controllers aresubsequently connectedwith a two-core cable.

Up to 60 controllers can beconnected to one cable.

This cable is also connectedto a gateway type AKA 243.

This gateway will nowcontrol the communication toand from the controllers.

It will collect temperaturevalues, and it will receivealarms.

When there is an alarm, thealarm relay will be activatedfor two minutes.

The gateway can now beconnected to a modem.

When there is an alarm fromone of the controllers, thegateway will via the modemcall up the service company.

At the service company amodem, gateway and PCwith system software typeAKM have been installed.

All the controller’s functionscan now be operated fromthe different menu pictures.

The programme will forinstance upload all thecollected temperature valuesonce a day.

• Measurements are shownat one side and settings atthe other.

• You will also be able to seethe parameter names ofthe functions on page 4-8.

• With a simple change-overthe values can also beshown in a trend diagram.

• If you wish to check earliertemperature measure-ments, you can see themin the log collection.

AlarmsIf the controller is extendedwith data communication, itwill be possible to define theimportance of the transmit-ted alarms.The importance is definedwith the setting: 1, 2, 3 or 0.When the alarm then arisesat some time, it will result inone of the following activi-ties:

1 = AlarmThe alarm message is sentoff with alarm status 1. Thismeans that the gateway withaddress 125 in the systemwill have its alarm relayoutput activated for twominutes. Later, when thealarm ceases, the alarm textwill be retransmitted, butnow with status value 0.

2 = MessageThe alarm text is transmittedwith status value 2. Later,when the “message” lapses,the alarm text isretransmitted, but now withstatus value 0.

3 = AlarmAs “1”, but the mastergateway’s relay output is notactivated.

0 = Suppressed informationThe alarm text is stopped atthe controller. It is transmit-ted nowhere.


List of literatureTechnical brochure RD.8A.E

Contains the general informations from this manual.Instructions RI.8A.E

Here you can see how controllers are mounted and programmed.Installation guide for extended operation RC.8A.C

Here you can see how a data communication connection to ADAP-KOOL® can be established.Refrigeration controls with EKC LonWorks®.

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 toproducts 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.

RC

-ET

Date post:	17-Jul-2016
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