документацию Controller for temperature control - EKC 202A, B,C

документацию Controller for temperature control - EKC 202A, B,C
Controller for temperature control
- EKC 202A,B,C and EKC 302A,B
Manual
Introduction
Application
• The controller is used for temperature control refrigeration
appliances and cold room in supermarkets
• Control of defrost, fans, alarm and light
• EKC 202 for front panel mounting
• EKC 302 for DIN-rail mounting
Principle
The controller contains a temperature control where the signal
can be received from one temperature sensor.
The sensor is placed in the cold air flow after the evaporator or in
the warm air flow just before the evaporator.
The controller controls the defrost with either natural defrost or
electric defrost. Renewed cutin after defrost can be accomplished
based on time or temperature.
A measurement of the defrost temperature can be obtained
directly through the use of a defrost sensor.
Two to four relays will cut the required functions in and out – the
application determines which:
• Refrigeration (compressor or solenoid valve)
• Defrost
• Fan
• Alarm
• Light
The different applications are described on next page.
Advantages
• Integrated refrigeration-technical functions
• Defrost on demand in 1:1 systems
• Buttons and seal imbedded in the front (EKC 202)
• IP65 density from the front panel (EKC 202)
• Digital input for either:
- Door contact function with alarm
- Defrost start
- Start/stop of regulation
- Night operation
- Change-over between two temperature reference
- Case cleaning function
• Instant programming via programming key
• HACCP
Factory calibration that will guarantee a better measuring accuracy than stated in the standard EN 441-13 without subsequent
calibration (Pt 1000 ohm sensor)
Extra module
• The controller can afterwards be fitted with an insertion module
if the application requires it.
The controller has been prepared with plug, so the module
simply has to be pushed in.
Contents
Introduction........................................................................................................ 2
Operation............................................................................................................. 5
Menu survey........................................................................................................ 6
Functions.............................................................................................................. 8
2
Override..............................................................................................................15
Connections......................................................................................................16
Ordering.............................................................................................................18
Technical data...................................................................................................19
Manual RS8DZ702 © Danfoss 03-2012
EKC 202 / 302
EKC 202A / EKC 302A
Controller with two relay outputs, two temperature sensors and
digital input.
Temperature control at start/stop of compressor / solenoid valve
Defrost sensor
Electrical defrost / gas defrost
Alarm function
If an alarm function is required, relay number two may be used for
it.
Defrost is performed here with circulation of the air as the fans are
operating continuously.
EKC 202B / EKC 302B
Controller with three relay outputs, two temperature sensors and
digital input.
Temperature control at start/stop of compressor / solenoid valve
Defrost sensor
Electrical defrost / gas defrost
Relay output 3 is used for control of fan.
EKC 202C
Controller with four relay outputs, two temperature sensors and
digital input.
Temperature control at start/stop of compressor / solenoid valve
Defrost sensor
Electrical defrost / gas defrost
Control of fan
Relay output 4 can be used for an alarm function or for a light
function.
EKC 202 / 302
Manual RS8DZ702 © Danfoss 03-2012
3
Start of defrost
A defrost can be started in different ways
Interval:
Defrost is started at fixed time intervals, say, every eight hour
Refrigeration time:
Defrost is started at fixed refrigeration time inter-
vals, in other words, a low need for
refrigeration will ”postpone” the coming defrost
Contact
Defrost is started here with a pulse signal on a digital input.
Manual:
An extra defrost can be activated from the control-
ler’s lower-most button
S5-temp.
In 1:1 systems the efficiency of the evaporator can be followed. Icing-up will start a defrost.
Schedule
Defrost here can be started at fixed times of the day and night. But max. six defrosts
Network
A defrost can be started via data communication
All the mentioned methods can be used at random – if just one
them is activated a defrost will be started. When the defrost starts
the defrost timers are set at zero
A pulse signal
starts the
defrost
If you need coordinated defrost, this must be done via data communication.
Digital input
The digital input can be used for the following functions:
- Door contact function with alarm if the door has been open for
too long.
- Defrost start
- Start/stop of regulation
- Change-over to night operation
- Case cleaning
- Change to another temperature reference
- Inject on/off
Case cleaning function
This function makes it easy to steer the refrigeration appliance
through a cleaning phase. Via three pushes on a switch you
change from one phase to the next phase.
The first push stops the refrigeration – the fans keep working
”Later”: The next push stops the fans
”Still later”: The next push restarts refrigeration
The different situations can be followed on the display.
-
+
+
°C
1
÷
+
Fan
There is no temperature monitoring during case cleaning.
2
÷
÷
Off
3
+
+
°C
On the network a cleaning alarm is transmitted to the system unit.
This alarm can be ”logged” so that proof of the sequence of events
is provided.
Defrost on demand
1 Based on refrigeration time
When the aggregate refrigeration time has passed a fixed time,
a defrost will be started.
2 Based on temperature
The controller will constantly follow the temperature at S5.
Between two defrosts the S5 temperature will become lower
the more the evaporator ices up (the compressor operates for a
longer time and pulls the S5 temperature further down). When
the temperature passes a set allowed variation the defrost will
be started.
This function can only be used in 1:1 systems
4
Manual RS8DZ702 © Danfoss 03-2012
EKC 202 / 302
Operation
Display
The values will be shown with three digits, and with a setting you
can determine whether the temperature are to be shown in °C or
in °F.
Examples
Set menu
1. Push the upper button until a parameter r01 is shown
2. Push the upper 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 enter the value.
Light-emitting diodes (LED) on front panel
There are LED’s on the front panel which will light up when the
belonging relay is activated.
= Refrigeration
= Defrost
= Fan
Cutout alarm relay / receipt alarm/see alarm code
• Push briefly the upper button
If there are several alarm codes they are found in a rolling stack.
Push the uppermost or lowermost button to scan the rolling
stack.
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.
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 to select the setting
Defrost
During defrost a –d– is shown in the display. This view will
continue up till 15 min. after the cooling has resumed.
However the view of –d– will be discontinued if:
- The temperature is suitable within the 15 minutes
- The regulation is stopped with “Main Switch”
- A high temperature alarm appears
Manuel start or stop of a defrost
• Push the lower button for four seconds.
See the temperature at the defrost sensor
• Push briefly the lower button
If no sensor has been mounted, ”non” will appear.
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
100% tight
The buttons and the seal are imbedded in the front.
A special moulding technique unites the hard front plastic, the
softer buttons and the seal, so that they become an integral
part of the front panel. There are no openings that can receive
moisture or dirt.
EKC 202 / 302
Manual RS8DZ702 © Danfoss 03-2012
5
Menu survey
EKC 202: SW = 1.3x
EKC 302: SW = 1.0x
Parameters
Function
Max.value
Factory
setting
---
-50°C
50°C
2°C
r01
r02
r03
r04
r05
r09
r12
r13
r39
r40
0,1 K
-49°C
-50°C
-20 K
°C
-10 K
-1
-10 K
OFF
-50 K
20 K
50°C
49°C
20 K
°F
10 K
1
10 K
on
50 K
2K
50°C
-50°C
0.0 K
°C
0K
1
0K
OFF
0K
A03
A04
A12
A13
A14
A27
A37
0 min
0 min
0 min
-50°C
-50°C
0 min
0°C
240 min
240 min
240 min
50°C
50°C
240 min
99°C
30 min
60 min
90 min
8°C
-30°C
30 min
50°C
c01
c02
c30
c70
0 min
0 min
0 / OFF
OFF
30 min
30 min
1 / on
On
0 min
0 min
0 / OFF
On
d01
d02
d03
d04
d05
d06
d07
d08
d09
no
0°C
0 hours
0 min
0 min
0 min
0 min
-15°C
0
gas
25°C
48 hours
180 min
240 min
60 min
60 min
0°C
2
EL
6°C
8 hours
45 min
0 min
0 min
0 min
-5°C
1
0
0 hours
0K
2
48 hours
20 K
0
0 hours
20 K
no
0 min
-50°C
yes
30 min
50°C
no
0 min
50°C
0 hours
23 hours
0 hours
0 min
59 min
0 min
0 hours
0 min
1
1
0
23 hours
59 min
31
12
99
0 hours
0 min
1
1
0
0s
0
600 s
11
5s
0
0
OFF
0
Pt
no
0 min
1
240
ON
100
ntc
yes
60 min
3
0
OFF
0
Pt
no
20
1
OFF
ON
OFF
0: Stopped
1: Running
2: Running during pump down and defrost
Defrost sensor (0=time, 1=S5, 2=Sair)
d10
Max. aggregate refrigeration time between two defrosts
d18
Defrost on demand - S5 temperature’s permitted variation during frost build-up. On
d19
central plant choose 20 K (=off )
Fans
Fan stop at cutout compressor
F01
Delay of fan stop
F02
Fan stop temperature (S5)
F04
Real time clock
Six start times for defrost.
t01-t06
Setting of hours.
0=OFF
Six start times for defrost.
t11-t16
Setting of minutes.
0=OFF
Clock - Setting of hours
t07
Clock - Setting of minute
t08
Clock - Setting of date
t45
Clock - Setting of month
t46
Clock - Setting of year
t47
Miscellaneous
Delay of output signals after start-up
o01
Input signal on DI1. Function:
o02
0=not used. 1=status on DI1. 2=door function with alarm when open. 3=door alarm
when open. 4=defrost start (pulse-pressure). 5=ext.main switch. 6=night operation
7=change reference (r40 will be activated) 8=alarm function when closed. 9=alarm function when open. 10=case cleaning (pulse pressure). 11=Inject off when open.
Network address
o03
On/Off switch (Service Pin message)
o04
Access code 1 (all settings)
o05
Used sensor type (Pt /PTC/NTC)
o06
Display step = 0.5 (normal 0.1 at Pt sensor)
o15
Max hold time after coordinated defrost
o16
Configuration of light function (relay 4)
o38
1=ON during day operation. 2=ON / OFF via data communication. 3=ON follows the DIfunction, when DI is selected to door function or to door alarm
Activation of light relay (only if o38=2)
o39
6
Controller
EKC
EKC
202B
202C
/302B
Min.value
Codes
Normal operation
Temperature (set point)
Thermostat
Differential
Max. limitation of set point setting
Min. limitation of set point setting
Adjustment of temperature indication
Temperature unit (°C/°F)
Correction of the signal from Sair
Manual service(-1), stop regulation(0), start regulation (1)
Displacement of reference during night operation
Activation of reference displacement r40
Value of reference displacement (activation by r39 or DI)
Alarm
Delay for temperature alarm
Delay for door alarm
Delay for temperature alarm after defrost
High alarm limit
Low alarm limit
Alarm delay DI1
High alarm limit for condenser temperature (o70)
Compressor
Min. ON-time
Min. OFF-time
Compressor relay must cutin and out inversely (NC-function)
External relays (Zero crossing control – only EKC 302)
Must be 'ON' when connecting to external relays
Defrost
Defrost method (none/EL/gas)
Defrost stop temperature
Interval between defrost starts
Max. defrost duration
Displacement of time on cutin of defrost at start-up
Drip off time
Delay for fan start after defrost
Fan start temperature
Fan cutin during defrost
EKC
202A /
302A
Manual RS8DZ702 © Danfoss 03-2012
Actual
setting
EKC 202 / 302
Case cleaning. 0=no case cleaning. 1=Fans only. 2=All output Off.
Access code 2 (partly access)
EKC 202 only. Save the controllers present settings to the programming key. Select your
own number.
EKC 202 only. Load a set of settings from the programming key (previously saved via o65
function)
Replace the controllers factory settings with the present settings
Re alternative application for the S5 sensor (maintain the setting at 0 if it is used as
defrost sensor, otherwise 1 = product sensor and 2 = condenser sensor with alarm)
Select application for relay 4: 1=defrost/light, 2= alarm
Service
Temperature measured with S5 sensor
Status on DI1 input. on/1=closed
Status on night operation (on or off ) 1=closed
Read the present regulation reference
Status on relay for cooling (Can be controlled manually, but only when r12=-1)
Status on relay for fans (Can be controlled manually, but only when r12=-1)
Status on relay for defrost. (Can be controlled manually, but only when r12=-1)
Temperature measured with Sair sensor
Status on relay 4 (alarm, defrost, light). (Can be controlled manually, but only when
r12=-1)
Factory setting
If you need to return to the factory-set values, it can be done in this way:
- Cut out the supply voltage to the controller
- Keep upper and lower button depressed at the same time as you recon­nect the
supply voltage
Fault code display
E1
Fault in controller
E6
Change battery + check clock
E 27
S5 sensor error
E 29
Sair sensor error
o46
o64
o65
0
0
0
2
100
25
0
0
0
o66
0
25
0
o67
o70
OFF
0
On
2
OFF
0
1
2
2
o72
defrost /
Alarm
Light /
Alarm
u09
u10
u13
u28
u58
u59
u60
u69
u71
Alarm code display
A1
High temperature alarm
A2
Low temperature alarm
A4
Door alarm
A5
Max. Hold time
A 15
DI 1 alarm
A 45
Standby mode
A 59
Case cleaning
A 61
Condenser alarm
Status code display
S0
Regulating
S1
Waiting for end of the coordinated defrost
S2
ON-time Compressor
S3
OFF-time Compressor
S4
Drip-off time
S10
Refrigeration stopped by main switch
S11
Refrigeration stopped by thermostat
S14
Defrost sequence. Defrosting
S15
Defrost sequence. Fan delay
S16
Refrigeration stopped because of open DI
input
S17
Door open (open DI input)
S20
Emergency cooling
S25
Manual control of outputs
S29
Case cleaning
S32
Delay of output at start-up
non
The defrost temperature cannot be displayed. There is stop based on time
-dDefrost in progress / First cooling after
defrost
PS
Password required. Set password
Start-up:
Regulation starts when the voltage is on.
1 Go through the survey of factory settings. Make any necessary changes
in the respective parameters.
2 For network. Set the address in o03 and then transmit it to the gateway/
system unit with setting o04.
EKC 202 / 302
Manual RS8DZ702 © Danfoss 03-2012
7
Functions
Here is a description of the individual functions.
A controller only contains this part of the functions. Cf. the menu survey.
Function
Parameter
Parameter by operation via data communication
Normal display
Normally the temperature value from thermostat sensor Sair is displayed.
Display air (u69)
Thermostat
Thermostat control
Set point
Regulation is based on the set value plus a displacement, if applicable. The value is set via a push
on the centre button.
The set value can be locked or limited to a range with the settings in r02 and r03.
The reference at any time can be seen in ”u28 Temp. ref”
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.
Cutout °C
r01
Differential
To avoid a too high setting of the set point, the max. allowable reference value must be lowered.
r02
Max cutout °C
To avoid a too low setting of the set point, the min. allowable reference value must be increased.
r03
Min cutout °C
Correction of the display’s temperature showing
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.
Temperature unit
Set here if the controller is to show temperature values in °C or in °F.
r04
Disp. Adj. K
r05
Temp. unit
°C=0. / °F=1
(Only °C on AKM, whatever the setting)
Correction of signal from Sair
Compensation possibility through long sensor cable
r09
Adjust Sair
Start / stop of refrigeration
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 connected to the DI input.
Stopped refrigeration will give a ”Standby alarm”.
Night setback value
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.)
Activation of reference displacement
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).
r12
Main Switch
Value of reference displacement
The thermostat reference and the alarm values are shifted the following number of degrees
when the displacement is activated. Activation can take place via r39 or input DI
Ref.
Dif.
Set point limitation
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.
1: Start
0: Stop
-1: Manual control of outputs allowed
r13
Night offset
r39
Th. offset
r40
Th. offset K
Night setbck
(start of night signal)
8
Manual RS8DZ702 © Danfoss 03-2012
EKC 202 / 302
Alarm
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 controller front panel, and the alarm relay will cut in.
A03
With data communication the importance
of the individual alarms can be defined.
Setting is carried out in the “Alarm destinations” menu.
Alarm delay
A04
DoorOpen del
A12
Pulldown del
A13
HighLim Air
A14
LowLim Air
A27
AI.Delay DI
A37
Condtemp Al.
Alarm delay (short alarm delay)
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 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.
Time delay for cooling (long alarm delay)
This time delay is used during start-up, during defrost, 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.
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.
The limit value will also be raised in connection with reference displacement r39.
Lower alarm limit
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.
Delay of a DI alarm
A cut-out/cut-in input will result in alarm when the time delay is passed. The function is defined
in o02.
High alarm limit for condenser temperature
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 condenser sensor is accomplished in o70. The alarm is zeroset again 10 K
below the set temperature.
Reset alarm
Compressor
Compressor control
The compressor relay works in conjunction with the thermostat. When the thermostat calls for
refrigeration will 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
Reversed relay function for compressor relay
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 produces the result that there will be refrigeration if the supply voltage to the controller fails).
External relay (only EKC 302)
Here it is possible to force the build in relays to connect in the voltage's zero crossing. The lifetime of the relays is increased, or the load can be increased.
The function should not be activated if contactors are connected to one or more of the controller's relays. This will result in a reduction of the contactors lifetime.
0: The load is connected directly to the controller's relays (zero-crossing activated)
Relay contact and controller supply must use same phase.
1: The controller's relay must draw a external contactor (zero-crossing cancelled)
c30
Cmp relay NC
c70
Ext. Relay
EKC 202 / 302
Manual RS8DZ702 © Danfoss 03-2012
9
Defrost
Defrost control
The controller contains a timer function that is zeroset after each defrost start.
The timer function will start a defrost if/when the interval time is passed.
The timer function starts when voltage is connected to the controller, but it is displaced the 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. If there is a risk of power
failure for periods longer than four hours, a battery module should be mounted in the controller.
(only possible in EKC 202)
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
defrosts do not ”come tumbling” one after the other.
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.
Defrost method
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.
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.
d01
Def. method
d02
Def. Stop Temp
Interval between defrost starts
The function is zeroset and will start the timer function at each defrost start. When the time has
expired the function will start a defrost.
The function is used as a simple defrost start, or it may be used as a safeguard if the normal
signal fails to appear.
If master/slave defrost without clock function or without data communication is used, the interval time will be used as max. time between defrosts.
If a defrost start via data 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 will be the defrost time if d10 is selected to be 0)
Time staggering for defrost cut ins during start-up
The function is only relevant if you have several refrigeration appliances or groups where you
want the defrost to be staggered in relation to one another. The function is furthermore only
relevant if you have chosen defrost with interval start (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).
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).
d07
FanStartDel
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 another allowable value than the one set here.
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: Sair
d09
FanDuringDef
d10
DefStopSens.
10
Manual RS8DZ702 © Danfoss 03-2012
EKC 202 / 302
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.
Defrost on demand – S5 temperature
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
d18
MaxTherRunT
d19
CutoutS5Dif.
If you wish to see the temperature at the S5 sensor, push the controller’s lowermost button.
Defrost temp.
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
Def Start
Here you can start a manual defrost.
Hold After Def
Shows ON when the controller is
operating with coordinated defrost.
Defrost State
Status on defrost
1= pump down / defrost
Fan
Fan control
Fan stopped at cut-out compressor
Here you can select whether the fan is to be stopped when the compressor is cut out
F01
Fan stop CO
(Yes = Fan stopped)
Delay of fan stop when compressor is cut out
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.
F02
Fan del. CO
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.
F04
FanStopTemp.
Real-time clock
The controller (EKC 202) can accommodate one insertion module which may either be a data
communication module or a battery module for the real-time clock.
The battery module is used in conjunction with the real-time clock and will keep the clock going
during lengthy power failures.
Real-time clock
You can set up to six individual times for defrost starts for each 24-hour period. There is also a
date indication used for registration of temperature measurements.
Defrost start, hour setting
Defrost start, minute setting (1 and 11 belong together, etc.)
When all t01 to t16 equal 0 the clock will not start defrosts.
Clock: Hour setting
(Times cannot be set via data communication. Settings are only relevant when there
is no data communication).
t01-t06
t11-t16
t07
Clock: Minute setting
t08
Clock: Date setting
t45
Clock: Month setting
t46
Clock: Year setting
t47
EKC 202 / 302
Manual RS8DZ702 © Danfoss 03-2012
11
Miscellaneous
Miscellaneous
Delay of output signal after start-up
After start-up or a power failure the controller’s functions can be delayed so that overloading of
the electricity supply network is avoided.
Here you can set the time delay.
o01
DelayOfOutp.
Digital input signal - DI
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 pressure. 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) Reference displacement when DI1 is short-circuited. Displacement with “r40”.
8) Separate alarm function. Alarm will be given when the input is short-circuited.
9) Separate alarm function. Alarm will be given when the input is opened. (For 8 and 9 the time
delay is set in A27)
10) Case cleaning. The function is started with a pulse pressure. Cf. also description on page 4.
11) Inject on/off. Off when DI is open.
Address
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.
o02
DI 1 Config.
Definition takes place with the numerical
value shown to the left.
(0 = off )
The address is set between 1 and 240, gateway determined
o03
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.)
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
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 sensor (1000 ohm at 25°C) or an NTC sensor
(5000 Ohm at 25°C).
All the mounted sensors must be of the same type.
Display step
Yes: Gives steps of 0.5°
No: Gives steps of 0.1°
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.
Configuration of light function
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.
Activation of light relay
The light relay can be activated here (if 038=2)
Case cleaning
The status of the function can be followed here or the function can be started manually.
0 = Normal operation (no cleaning)
1 = Cleaning with fans operating. All other outputs are 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.
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.
o04
DI state
(Measurement)
The DI input’s present status is shown here.
ON or OFF.
After installation of data communication
the controller can be operated on an equal
footing with the other controllers in ADAPKOOL® refrigeration controls.
The installation of the data communication cable has been mentioned in a separate
document “RC8AC”.
12
Manual RS8DZ702 © Danfoss 03-2012
o05
-
o06
SensorConfig
Pt = 0
PTC = 1
NTC = 2
o15
Disp. Step = 0.5
o16
Max HoldTime
o38
Light config
o39
Light remote
o46
Case clean
o64
-
EKC 202 / 302
Copy the controller’s present settings (EKC 202 only)
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.
Copy from the programming key (EKC 202 only)
This function downloads a set of settings earlier 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.
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).
Other application for S5 sensor
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
o65
-
o66
-
o67
-
o70
S5 Config
Relay 4
Here you define the application for relay 4:
1: Defrost (EKC 202A / 302A) or Light (EKC 202C)
2: Alarm
o72
DO4 Config
- - - Night Setback
0=Day
1=Night
Service
Service
Temperature measured with S5 sensor
u09
S5 temp.
Status on DI input. on/1=closed
u10
DI1 status
Status on night operation (on or off ) 1=night operation
u13
Night Cond.
Read the present regulation reference
u28
Temp. ref.
* Status on relay for cooling
u58
Comp1/LLSV
* Status on relay for fan
u59
Fan relay
* Status on relay for defrost
u60
Def. relay
* Temperature measured with Sair sensor
u69
Sair temp
* Status on relay 4 (alarm, defrost or light function)
u71
DO4 status
*) Not all items will be shown. Only the function belonging to the selected application can be
seen.
EKC 202 / 302
Manual RS8DZ702 © Danfoss 03-2012
13
Fault message
In an error situation the LED’s on the front 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. If there are
further push again to see them.
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:
A1: High temperature alarm
Alarms
A2: Low temperature alarm
Low t. alarm
A4: Door alarm
Door Alarm
A5: Information. Parameter o16 is expired
Max Hold Time
A15: Alarm. Signal from DI input
DI1 alarm
A45: Standby position (stopped refrigeration via r12 or DI input)
Standby mode
A59: Case cleaning. Signal from DI input
Case cleaning
A61: Condenser alarm
Cond. alarm
E1: Faults in the controller
EKC error
E6: Fault in real-time clock. Check the battery / reset the clock.
-
E27: Sensor error on S5
S5 error
E29: Sensor error on Sair
Sair error
1 = alarm
High t. alarm
When copying settings to or from a copying key with functions o65 or o66, the following information may appear:
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).
Alarm destinations
The importance of the individual alarms
can be defined with a setting (0, 1, 2 or 3)
Warning ! Direct start of compressors *
To prevent compressor breakdown parameter c01 and c02 should be set according to suppliers requirements or in general :
Hermetic Compressors c02 min. 5 minutes
Semihermetic Compressors c02 min. 8 minutes and c01 min. 2 to 5 minutes ( Motor from 5 to 15 KW )
* ) Direct activating of solenoid valves does not require settings different from factory (0)
14
Manual RS8DZ702 © Danfoss 03-2012
EKC 202 / 302
Override
The controller contains a number of functions that can be used together with the override function in the master gateway / System
Manager.
Function via data communication
Functions to be used in the gateway’s
override function
Used parameter in EKC 202
and EKC 302
Start of defrosting
Defrost control
Time schedule
- - - Def.start
Coordinated defrost
Defrost control
- - - HoldAfterDef
u60 Def.relay
Night setback
Day/night control
Time schedule
- - - Night setbck
Light control
Day/night control
Time schedule
o39 Light Remote
EKC 202 / 302
Manual RS8DZ702 © Danfoss 03-2012
15
Connections
EKC 202A
EKC 202B
EKC 202C
or
EKC 302A
or
EKC 302B
or
Digital On/Off signal
A cut-in input will activate a function. The possible functions are
described in menu o02.
Power supply
230 V a.c.
Sensors
Sair is thermostat sensors.
S5 is a defrost sensor and is used if defrost has to be stopped
based on temperature. It may however also be used as product
sensor or condenser sensor.
16
Relays
The general connections are:
Refrigeration. The contact will cut in when the controller demands refrigeration
Defrost.
Fan.
Alarm. The relay is cut out during normal operation and cuts
in in alarm situations and when the controller is dead
(de-energised)
Light.
The contact will cut in when the controller
demands light.
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
Manual RS8DZ702 © Danfoss 03-2012
EKC 202 / 302
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..
Data communication
EKC 202:
MODBUS or LON-RS485 via insert cards.
EKC 302:
Fixed MODBUS or
LON-RS485/MODBUS via insert card.
See also below when using external
display
Extenal display on EKC 302
Only in standalone
Do not connect anything other than a display on data communication.
The distance to the display must not exceed 200 m.
An address has to be set in o03 (0 can not be used).
The display will self find the controller address.
EKC 302
External display plus data communication
EKC 302
+
+
EKC 202 / 302
Manual RS8DZ702 © Danfoss 03-2012
EKA 175 (LON RS485)
EKA 178B (MODBUS)
17
Ordering
Type
Function
Supply voltage
Code no.
EKC 202A
Refrigeration controller
EKC 202B
Refrigeration controller with fan function
EKC 202C
Refrigeration controller for electric defrost
084B8523
EKA 178A
Data communication module. MOD-bus
084B8564
EKA 179A
Data communication module. RS 485- LON
084B8565
EKA 181A
Battery and buzzer module that will protect the clock in case of lengthy
power failure
084B8566
EKA 181C
Battery module that will protect the clock in case of lengthy power failure
EKA 182A
Copy key EKC - EKC
Type
Function
EKC 302A
Refrigeration controller with MODBUS data communication
EKC 302B
Refrigeration controller r with fan function and MODBUS
data communication
084B4163
EKA 175
Data communication module LON RS485
084B8579
EKA 178B
Data communication module MODBUS
084B8571
EKA 163A
External display option
084B8562
EKA 164A
External operation option
084B8563
084B8521
230 V
084B8522
0848577
084B8567
Supply voltage
Code no.
084B4162
230 V
Temperature sensors: please refer to lit.no. RK0YG
Type
Funcion
EKA 183A
Programming key
Code no.
084B8582
Copy tool for setting of EKC. For further details refer to Technical Brochure RD8BJ
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Manual RS8DZ702 © Danfoss 03-2012
EKC 202 / 302
Technical data
Supply voltage
230 V a.c. +10/-15 %. 2.5 VA, 50/60 Hz
Pt 1000 or
Sensors 3 pcs off
PTC (1000 ohm / 25°C) or
either
NTC-M2020 (5000 ohm / 25°C)
Measuring
-60 to +99°C
range
±1 K below -35°C
Accuracy
Controller
±0.5 K between -35 to +25°C
±1 K above +25°C
Pt 1000
±0.3 K at 0°C
sensor
±0.005 K per grad
Display
LED, 3-digits
External display
Digital inputs
Electrical connection cable
EKA 163A / EKA 164A
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
Max. 1 mm2 on sensors and DI inputs
Weight = 200 g
IEC60730
EKC 202
DO1
10 (6) A & (5 FLA, 30 LRA)
DO2
DO3
10 (6) A & (5 FLA, 30 LRA)
6 (3) A & (3 FLA, 18 LRA)
DO4**
DO1
Relays*
EKC 302
DO2
DO3
DO4**
Data communication
Environments
Density
4 (1) A, Min. 100 mA**
10 (6) A & (5 FLA, 30 LRA)
1)
16 (8) A & (10 FLA, 60 LRA)
2)
6 (3) A & (3 FLA, 18 LRA)
1)
10 (6) A & (5 FLA, 30 LRA)
2)
6 (3) A & (3 FLA, 18 LRA)
1)
10 (6) A & (5 FLA, 30 LRA)
2)
4 (1)A Min. 100 mA**
EKC 202: Via insert card
EKC 302: Fixed MODBUS. Can be expanded with LON or
MODBUS via insert card
0 to +55°C, During operations
-40 to +70°C, During transport
20 - 80% Rh, not condensed
No shock influence / vibrations
EKC 202: IP 65 from front.
Buttons and packing are imbedded in the front.
EKC 302: IP 20
Escapement
reserve for the
clock
4 hours
Approvals
EU Low Voltage Directive and EMC demands re CEmarking complied with
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
* EKC 202: DO1 and DO2 are 16 A relays. DO3 and DO4 are 8 A relays. Above max. load must be
kept.
EKC 302: DO1 are 20 A relays. DO2 and DO3 are 16 A relays. DO4 are 10 A relays. The max. load
listed above must be observed when connecting without zero-crossing control. When connecting
with zero-crossing control, the load must be increased to the value indicated by 2)
** Gold plating ensures make function with small contact loads
1) With external relay (c70=ON) (zero-crossing control disabled)
2) Without external relay (c70=OFF) (zero-crossing control enabled)
Relay contact and controller supply must use same phase and the load (compressor) must phase
compensated to Cos ϕ = 1.
EKC 202 / 302
Manual RS8DZ702 © Danfoss 03-2012
19
20
Manual RS8DZ702 © Danfoss 03-2012
EKC 202 / 302
ADAP-KOOL®
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.
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