Controller for temperature control

Controller for temperature control
Controller for temperature control
- EKC 102
REFRIGERATION AND
AIR CONDITIONING
Manual
Introduction
Application
• The controller is used for temperature control refrigeration appliances and cold room
• Defrost control
• For front panel 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 an S5 sensor.
One or two relays will cut the required functions in and out – the
application determines which:
• Refrigeration (compressor or solenoid valve)
• Defrost
• Alarm
• Refrigeration 2 (compressor 2)
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
• IP65 density from the front panel
• Can control two compressors
• Digital input for either:
- Door alarm
- Defrost start
- Start/stop of regulation
- Night operation
• 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)
The series
There are three controllers in the series:
A-model for simple regulation
B-model where an alarm function and possibly also a digital input
will be required
C-model where the defrost temperature also enjoys top priority
All these three controllers are without data communication.
If data communication or additional functions are required, we
refer you to the EKC 202 or EKC 204A series.
2
Manual
RS8DY302
©
Danfoss
07-2005
EKC 102
EKC 102A
Controller with one relay output and one temperature sensor.
Temperature control at start/stop of compressor.
Natural defrost at stop of compressor.
Instead of the compressor a solenoid valve may of course be
connected in the liquid line.
Heating function
The controller can also be used as a simple ON/OFF thermostat for
heating applications.
EKC 102B
Controller with two relay outputs, extra temperature sensor and
digital input.
Relay output 2 can be used for alarm function or for cutin and
cutout of a refrigeration step 2.
The extra temperature signal can be used for product sensor or for
condenser sensor with alarm function.
The digital input can be used for door alarm, defrost start, start/
stop of refrigeration or for night signal.
EKC 102C
Controller with two relay outputs, extra temperature sensor and
digital input.
Relay output 2 can be used for electric defrost or for an alarm
function.
Temperature signal 2 can be used for defrost stop based on
temperature or for product sensor.
In a 1:1 sysem and with the sensor mounted on the evaporator
the controller will be able to use the ”defrost on demand”
function. The function will start a defrost when the evaporator’s
refrigeration capacity drops due to icing-up.
The digital input can be used for door alarm, defrost start, start/
stop of refrigeration or for night signal.
EKC 102
Manual
RS8DY302
©
Danfoss
07-2005
3
Start of defrost
A defrost can be started in different ways
Interval:
Defrost is started at fixed time intervals, say, every
eighth 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 controller’s lower-most button
S5-temp.
In 1:1 systems the efficiency of the evaporator can
be followed. Icing-up will start a defrost.
Start-up
After a power cut the system can be started with a
defrost.
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
Refrigeration control with two compressors
The two compressors must be of the same size.
When the controller demands refrigeration it will first cut in the
compressor with the shortest operating time. After the time delay
the second compressor will be cut in.
When the temperature has dropped to ”the middle of the differential” the compressor with the longest operating time will be cut
out.
If the Compressor in operation is unable to lower the temperature
to the cutout point, the other compressor will be cut in again. This
happens when the temperature reaches the upper part of the
differential. If the temperature, on the contrary, remains ”stuck”
within the differential for two hours there will be a change-over
between the two compressors so that the operating time can be
equalised.
The compressors used must be of a type that is capable of starting
up against a high pressure.
Digital input
2 of the controllers has a digital input which 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
4
Manual
RS8DY302
©
Danfoss
07-2005
EKC 102
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.
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
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.
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 againt to enter the value.
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.
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
Manuel start or stop of a defrost
• Push the lower button for four seconds.
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
See the temperature at the other temperature sensor
• Push briefly the lower button
If no sensor has been mounted, ”non” will appear.
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 102
Manual
RS8DY302
©
Danfoss
07-2005
5
Menu survey
EKC 102A
SW = 1.1x
Parameters
Function
Normal operation
Temperature (set point)
Thermostat
Differential
Max. limitation of setpoint setting
Min. limitation of setpoint setting
Adjustment of temperature indication
Temperature unit (°C/°F)
Correction of the signal from Sair
Manual service (-1), stop regulation (0), start regulation (1)
Compressor
Min. ON-time
Min. OFF-time
Compressor relay must cutin and out inversely
(NC-function)
Defrost
Defrost method (0=none / 1=natural)
Defrost stop temperature
Interval between defrost starts
Max. defrost duration
Displacement of time on cutin of defrost at start-up
Defrost sensor (0=time, 1=Sair)
Defrost at start-up
Miscellaneous
Delay of output signals after start-up
Access code
Used sensor type (Pt /PTC/NTC)
Refrigeration or heat (rE=refrigeration, HE=heat)
Display step = 0.5 (normal 0.1 at Pt sensor)
Save the controllers present settings to the programming
key. Select your own number.
Load a set of settings from the programming key (previously saved via o65 function)
(Can only be set when regulation is stopped (r12=0)
Replace the controllers factory settings with the present
settings
Service
Status on relay
Can be controlled manually, but only when r12=-1
Codes
Min.value
Max.value
Factory
setting
---
-50°C
99°C
2°C
r01
r02
r03
r04
r05
r09
r12
0,1 K
-49°C
-50°C
-20 K
°C
-10 K
-1
20 K
99°C
99°C
20 K
°F
10 K
1
2K
99°C
-50°C
0K
°C
0K
1
c01
c02
c30
0 min
0 min
OFF
30 min
30 min
On
0 min
0 min
OFF
d01
d02
d03
d04
d05
d10
d13
0
0°C
0 hours
0 min
0 min
0
no
1
25°C
48 hours
180 min
240 min
1
yes
1
6°C
8 hours
45 min
0 min
0
no
o01
o05
o06
o07
o15
o65
0s
0
Pt
rE
no
0
600 s
100
ntc
HE
yes
25
5s
0
Pt
rE
no
0
o66
0
25
0
o67
OFF
On
OFF
u58
Actual
setting
Regulation starts when the voltage is
on.
Fault code display
A45
Standby mode
Alarm code display
E1
Fault in controller
E29
Sair sensor error
Status code display
S0
Regulating
S2
ON-time Compressor
S3
OFF-time Compressor
S11
Refrigeration stopped by thermostat
S14
Defrost sequence. Defrosting
S20
Emergency cooling
S32
Delay of output at start-up
non
The defrost temperature cannot be
displayed. There is no sensor
-dDefrost in progress / First cooling
after defrost
PS
Password required. Set password
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
6
Manual
RS8DY302
©
Danfoss
07-2005
EKC 102
EKC 102B and EKC 102C
SW = 1.1X
Parameters
EKC
102B
EKC
102C
Min.value
Function
Codes
Normal operation
Temperature (set point)
---50°C
Thermostat
Differential
r01
0,1 K
Max. limitation of setpoint setting
r02
-49°C
r03
-50°C
Min. limitation of setpoint setting
Adjustment of temperature indication
r04
-20 K
Temperature unit (°C/°F)
r05
°C
Correction of the signal from Sair
r09
-10 K
Manual service, stop regulation, start regulation (-1, 0, 1)
r12
-1
Displacement of reference during night operation
r13
-10 K
Alarm
Delay for temperature alarm
A03
0 min
Delay for door alarm
A04
0 min
Delay for temperature alarm after defrost
A12
0 min
A13
-50°C
High alarm limit
Low alarm limit
A14
-50°C
High alarm limit for condenser temperature (o69)
A37
0°C
Compressor
Min. ON-time
c01
0 min
Min. OFF-time
c02
0 min
Time delay for cutin of comp.2
c05
0 sec
Compressor relay must cutin and out inversely
c30
OFF
(NC-function)
Defrost
Defrost method (0=none / 1=natural)
d01
0
d02
0°C
Defrost stop temperature
Interval between defrost starts
d03
0 hours
Max. defrost duration
d04
0 min
Displacement of time on cutin of defrost at start-up
d05
0 min
Defrost sensor 0=time, (B:1=Sair.) (C: 1=S5, 2=Sair)
d10 1=Sair 1=S5
0
Defrost at start-up
d13
no
Max. aggregate refrigeration time between two defrosts
d18
0 hours
Defrost on demand - S5 temperature’s permitted variation
d19
0K
during frost build-up. On central plant choose 20 K (=off )
Miscellaneous
Delay of output signals after start-up
o01
0s
Input signal on DI1. Function:
o02
0
(0=not used. , 1= door alarm when open. 2=defrost start
(pulse-pressure). 3=ext.main switch. 4=night operation
o05
0
Access code 1 (all settings)
Used sensor type (Pt /PTC/NTC)
o06
Pt
o15
no
Display step = 0.5 (normal 0.1 at Pt sensor)
Access code 2 (partly access)
o64
0
Save the controllers present settings to the programming
o65
0
key. Select your own number.
o66
0
Load a set of settings from the programming key (previously saved via o65 function)
(Can only be set when regulation is stopped (r12=0)
o67
OFF
Replace the controllers factory settings with the present
settings
Select application for Saux sensor (0=not used, 1=product
o69
0
sensor, 2=condenser sensor)
o70
0
Select application for S5 sensor (0=defrost sensor, 1=
product sensor)
o71 Comp. / Defrost/
1
Select application for relay 2: 1=compressor-2 / defrost, 2=
Alarm
Alarm
alarm relay
Service
Temperature measured with Saux sensor
u03
Temperature measured with S5 sensor
u09
Status on DI1 input. on/1=closed
u10
Status on relay for cooling
u58
Can be controlled manually, but only when r12=-1
Status on relay 2
u70
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
EKC 102
Manual
RS8DY302
©
Danfoss
Max.value
Factory
setting
50°C
2°C
20 K
50°C
49°C
20 K
°F
10 K
1
10 K
2K
50°C
-50°C
0K
°C
0K
1
0K
240 min
240 min
240 min
50°C
50°C
99°C
30 min
60 min
90 min
8°C
-30°C
50°C
30 min
30 min
999 sec
On
0 min
0 min
5 sec
OFF
1
25°C
48 hours
180 min
240 min
1 (2)
yes
48 hours
20 k
1
6°C
8 hours
45 min
0 min
0
no
8 hours
2K
600 s
4
5s
0
100
ntc
yes
100
25
0
Pt
no
0
0
25
0
On
OFF
2
0
1
0
2
1
07-2005
Actual
setting
Regulation starts when the
voltage is on.
Alarm code display
A1
High temperature alarm
A2
Low temperature alarm
A4
Door alarm
A45
Standby mode
A61
Condenser alarm
Fault code display
E1
Fault in controller
E27
S5 sensor error
E29
Sair sensor error
E30
Saux sensor error
Status code display
S0
Regulating
S2
ON-time Compressor
S3
OFF-time Compressor
S10
Refrigeration stopped by main
switch
S11
Refrigeration stopped by
thermostat
S14
Defrost sequence. Defrosting
S17
Door open (open DI input)
S20
Emergency cooling
S25
Manual control of outputs
S32
Delay of output at start-up
non The defrost temperature
cannot be displayed. There is
no sensor
-dDefrost in progress / First cooling after defrost
PS
Password required. Set
password
7
Functions
Here is a description of the individual functions.
A controller only contains this part of the functions. Cf. the menu
survey.
Function
No.
Normal display
Normal display shows the temperature value from the
thermostat sensor Sair.
Thermostat
Set point
Regulation is based on the set value. 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.
Differential
When the temperaure 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 must be lowered.
To avoid a too low setting of the setpoint, the min. allowable reference value must be increased.
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.
Correction of signal from Sair
Compensation possibility through 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.
1 = regulation
0 = regulation is stopped
-1 = regulation is stopped - override allowed.
Stopped regulation 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 the function is used for
”quick cooling”.)
Alarm
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
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.
8
r01
Manual
RS8DY302
©
r02
r03
r04
r05
r09
r12
r13
A03
A04
Danfoss
Time delay for cooling (long alarm delay)
This time delay is used during start-up (recovery time),
during defrost, in the cooling phase 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.
Lower alarm limit
Here you set when the alarm for low temperature is to
start. The limit value is set in °C (absolute value).
High alarm limit for condenser temperature
If the Saux 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. There is
no alarm delay. The alarm disappears again when the
temperature has dropped 10 degrees. Definition of Saux
takes place in o69.
Compressor
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)
Min. OFF-time (in minutes)
Time delay for couplings of two compressors
Settings indicate the time that has to elapse from the
first relay cuts in and until the next relay has to cut in.
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). (When two compressors are
cut in and out the two relays will operate in opposite
directions).
Defrost
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.
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.
Defrost start can also be accomplished 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 or natural
defrost.
The actual defrost will be stopped based on time or temperature with a signal from a temperature sensor.
07-2005
A12
A13
A14
A37
c01
c02
c05
c30
EKC 102
Defrost method
Here you set whether defrost is to be accomplished with
electricity, natural or "non".
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.
When there is defrost with clock function on the DI input
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.
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.
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.
Defrost sensor
Here you define the defrost sensor.
0: None, defrost is based on time
EKC 102A: 1=Sair
EKC 102B: 1=Sair.
EKC 102C: 1=S5. 2=Sair
Defrost during start-up
Here you can set if the controller is to start with a defrost
if the power has been cut.
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
If you wish to see the temperature at the S5 sensor, push
the controller’s lowermost button.
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
The LED on the controller’s front will indicate whether a
defrost is going on.
EKC 102
Manual
RS8DY302
©
d01
d02
d03
d04
d05
d10
d13
d18
d19
Danfoss
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 - DI
The controller has a digital input which can be used for
one of the following functions:
Off: The input is not used
1) Door function. 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
2) Defrost. The function is started with a pulse pressure
of at least two seconds’ duration. The controller will
register when the input is reopened. 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).
3) Main switch. Regulation is carried out when the input
is short-circuited, and regulation is stopped when the
input is put in pos. OFF.
4) Night operation. When the input is short-circuited,
there will be regulation for night operation.
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.
Function options
The thermostat’s function is defined, as follows:
rE: Refrigeration. The relay cuts in when lower temperatures are required.
HE: Heating. The relay cuts in when higher temperatures
are required (remember to cancel defrost functions
and compressor functions). With this function the
thermostat’s differential will lie below the setpoint
(the relay will cut in at setpoint minus differential).
Display step
Yes: Gives steps of 0.5°
No: Gives steps of 0.1°
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.
Copy the controller’s present settings
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
Application (o61) and 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.
07-2005
o01
o02
o05
o06
o07
o15
o64
o65
9
Copy from the programming key
This function downloads a set of settings earlier saved in
the controller. Select the relevant number.
When copying has started the display returns to o66.
After two seconds you can move back into the mennu
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).
Extra sensor
Here you define the application for the Saux sensor.
0: None, no sensor is connected
1: Product sensor
2: Condenser temperature sensor with alarm function
S5 sensor
Here you define the application for the S5 sensor.
0: Defrost sensor
1: Product sensor
Relay 2
Here you define the application for relay 2
EKC 102B: 1=compressor. 2=alarm
EKC 102C: 1=defrost. 2=alarm
Service
Temperature measured with Saux sensor
Temperature measured with S5 sensor
Status on DI1 input. on/1=closed
Status on relay for refrigeration
Status on relay 2 (refrigeration, alarm or defrost)
o66
o67
o69
o70
o71
u03
u09
u10
u58
u70
Operating status
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 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:
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
several, you can continue pushing 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
A2: Low temperature alarm
A4: Door alarm
AA45: Standby position (stopped refrigeration via r12 or DI
input)
A61: Condenser temperature alarm
E1: Faults in the controller
E27: Sensor error on S5
E29: Sensor error on Sair
E30: Sensor error on Saux
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).
S0: Regulating
S2: When the compressor is operating it must run for at least x
minutes.
S3: When the compressor is stopped, it must remain stopped for at
least x minutes.
S10: Refrigeration stopped by main switch. Either with r12 or a
DI-input
S11: Refrigeration stopped by thermostat
S14: Defrost sequence. Defrost in progress
S17: Door is open. DI input is open
S20: Emergency cooling
S25: Manual control of outputs
S32: Delay on outputs during start-up
Other displays:
non: The defrost temperature cannot be displayed. There is no
sensor
-d-: Defrost in progress. /First cooling after defrost
PS: Password required. Set password
10
Manual
RS8DY302
©
Danfoss
07-2005
EKC 102
Connections
EKC 102A
EKC 102B
EKC 102C
or
or
or
Power supply
230 V a.c.
Sensors
Sair is thermostat sensors.
Saux is an extra sensor for measuring fx. the condenser temperature.
S5 is a defrost sensor and is used if defrost has to be stopped
based on temperature.
Digital On/Off signals
A cut-in input will activate a function. The possible functions are
described in menu o02.
Relays
The general connections are:
Relay 1
Refrigeration. The contact will cut in when the controller
demands refrigeration
Relay 2
Alarm. The relay is cut out during normal operation and cuts
in in alarm situations and when the controller is dead
(de-energised)
Refrigeration 2. The contact will cut in when refrigeration step 2
has to be cut in
Defrost. The contact will cut in when defrost is in progress
The controller cannot be hooked up with a monitoring unit
type m2.
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
Ordering
Type
Function
Code no.
EKC 102A
Temperature controller
084B8500
EKC 102B
Temperature controller with alarm function
084B8501
EKC 102C
Temperature controller for electric defrost
084B8502
EKA 182A
Copy key EKC - EKC
084B8567
Temperature sensors: Please refer to literature no. RK0YG
EKC 102
Manual
RS8DY302
©
Danfoss
07-2005
11
Data
Supply voltage
Sensors
Accuracy
Display
Digital inputs
Electrical connection cable
230 V a.c. +15/-15 %. 1,5 VA
Pt 1000 or
PTC (1000 ohm / 25°C) or
NTC-M2020 (5000 ohm / 25°C)
Measuring range -60 to +99°C
±1 K below -35°C
Controller
±0,5 K between -35 to +25°C
±1 K above +25°C
±0.3 K at 0°C
Pt 1000 sensor
±0.005 K per grad
LED, 3 digits
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 on supply and relays.
Max. 1 mm2 on sensors - and DI inputs.
Terminals are mounted on the circuit board
Refrigeration
Relays
Environments
Density
Approvals
Weight = 170 g
SPDT, Imax. = 10 A ohmic/
6 A AC 15* inductive
(It is a 16 A relay, but conductor
lanes and derating mean that 10 A
must not be exceeded).
Alarm/
Defrost/
Refrigeration 2
0 to +55°C, During operations
-40 to +70°C, During transport
20 - 80% Rh, not condensed
No shock influence / vibrations
IP 65 from front.
Buttons and packing are imbedded in the front.
EU Low Voltage Directive and EMC demands re CEmarking complied with
LVD tested acc. EN 60730-1 og EN 60730-2-9, A1, A2
EMC tested acc. EN50082-1 og EN 60730-2-9, A2
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.
12
Manual
RS8DY302
© Danfoss
07-2005
RC-EM
* AC 15 load to EN 60947-5-1
EKC 102
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