Controller for controlling one evaporator EKC 414A Manual REFRIGERATION AND

Controller for controlling one evaporator EKC 414A Manual REFRIGERATION AND
Controller for controlling one evaporator
EKC 414A
REFRIGERATION AND
AIR CONDITIONING
Manual
Introduction
Application
The controller is a complete control unit for refrigeration appliances with integrated refrigeration-technical functions capable of
replacing a setup of thermostats and timers.
The relays are used for operating:
- Compressor
- Fan
- defrost
- Alarm
- Light
The controller can operate one evaporator.
The intended placing of the controller is “on/near the refrigeration
appliance” and the controller is therefore provided with plugs at
the sensor connection points. All sensors used must therefore be
fitted with a belonging plug.
Operation
The controller comes without operating buttons on the front
panel, and it will require no operation once it has been set and
started up.
When the controller is operated, it can be done in one of the following ways:
• Connection of an external display with operating buttons
- The display will currently show measurements and settings in
the menu system
- In case of malfunction the relevant error code will be shown on
the display
- Four light-emitting diodes will show the system’s actual function:
› refrigeration
› power for the AKV valve
› defrost
› fan operating
› when there is an alarm the three LED’s will flash
• Data communication
The controller can be hooked up with other products in the
series of ADAP-KOOL® refrigeration controls. The operation,
monitoring and data collection can then be performed from a
PC – either on site or at a service company.
Customer display
If the temperature in the appliance is to be visible to, say, customers, a display can be mounted.
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Manual
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Danfoss
Inject ON function
The expansion valve closes when the signal at the 230V input is
removed or receives a signal via the data communication. In this
way it is ensured that the expansion valve will not charge the
evaporator when the compressor has stopped.
(The threading of the function may be cancelled via a setting).
Digital input
A digital input can be defined for one of the following applications:
Door alarm
Defrost start
Night operation
Start/stop of regulation
Joint defrost start/stop with a master/slave function
Data communication
The controller is provided with LON RS 485 data communication.
More about this data communication on page 18.
05-2005
EKC 414A
Function
Liquid supply
The supply of liquid is controlled on the basis of signals from the
pressure transmitter, temperature sensor S2 and the air temperature. The sensors create a signal so that the superheat is continuously kept at a minimum whatever the operating conditions.
The AKV valve functions both as expansion valve and solenoid
valve. The valve opens and closes based on signals from the
controller.
Temperature control
The temperature is controlled on the basis of signals from one
or two temperature sensors. If there is only one sensor it may
optionally be placed in the air before or after the evaporator. If
there are two sensors, one must be placed before and one after
the evaporator. With a setting it is subsequently defined how
large an influence the individual sensor is to have on the control.
The actual temperature control can take place in two ways: as an
ordinary ON/OFF regulation with a belonging differential, or as
a modulating control there the temperature variation will not be
nearly as great as in ON/OFF control. There is however a limit to
the use of them as a modulating control can only be used in central plant. In a decentralised plant the thermostat function with
ON/OFF control should be selected.
In a central plant the thermostat function may either be selected
for ON/OFF control or modulating control.
On / Off control
Defrost
With a simple function defrost can be started x times per day and
night. But the controller may also receive a signal from a defrost
clock or from another unit via the data communication, so that
defrost will take place at defined times of the day or night.
An on-going defrost can be stopped based on temperature, normally the one measured with the S5 sensor, or it may be stopped
based on time. A combination with stop based on temperature
and with the time factor as a precautionary measure is also a possibility.
Modulating control
Clock module (accessory)
If the controller is mounted without data communication and
defrost has to be carried out at specific times, a clock module can
be mounted.
The controller comes prepared with plug and terminals so that the
module just has to be pushed in.
Subsequently, up to six defrosts per day can be set. The module
has battery back-up.
EKC 414A
Manual
RS8CK502
©
Danfoss
05-2005
3
Survey of functions
Function
Thermostat function
Reference
The thermostat regulates on the basis of the set value. A change of the set value can
be limited/ locked with 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.
Para- Operation via
meter data communication
Thermostat control
Cutout temp
r01
Differential
r02
Max Cutout
To avoid a too low setting of the reference, the min. allowable reference value must
be increased.
r03
Min Cutout
Temperature unit
Set here if the controller is to show temperature values in °C
or in °F.
r05
Temp. unit
°C=0
(Only °C on AKM, whatever the setting)
Correction of signal from S4 (Sout)
Compensation possibility through long sensor cable
r09
Adjust Sout
Correction of signal from S3 (Sin)
Compensation possibility through long sensor cable
r10
Adjust Sin
Start / stop of refrigeration
With this setting refrigeration can be started and stopped.
Start / stop of refrigeration can also be accomplished with the external switch function connected to the DI input.
r12
Main Switch
Night setback value
The thermostat’s set reference will be increased by this value when the controller
changes over to night operation. (Select a negative value if there is to be cold accumulation.)
r13
Night offset
Thermostat function
Here it is defined how the thermostat is to operate. Either as an ordinary ON/OFF thermostat or as a modulating thermostat.
1: ON/OFF thermostat
2: Modulating
r14
Therm. mode
Ref.
Dif.
Reference limitation
The controller’s setting range for the reference 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 reference, the max. allowable reference value must
be lowered.
When operation is ”modulating” the AKV valve will limit the flow of refrigerant so that
the temperature variation will be less than for the ON/OFF thermostat.
In a decentralised plant you must select the ON/OFF thermostat setting.
The thermostat’s settings for cutout value and differential must be identical no matter
which of the two functions is selected. E.g. 5 K, if S4 is the thermostat sensor, or 3 K, if
S3 is the thermostat sensor.
For modulating thermostats the differential must not be set lower than 5 K.
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EKC 414A
Selection of thermostat sensor
Here you define the sensor the thermostat is to use for its control function. S3, S4, or
a combination of them. With the setting 0%, only S3 is used (Sin). With 100%, only S4
(Sout)
Melt function
Only for control of refrigeration (-5 to +10°C). The function ensures that the evaporator will not be closed by frost. Here you set how often the function is to stop the
refrigeration and hence transform the frost to water (or ice if there is too much frost).
r15
Sout %
r16
Meltinterval
Melt period
Here you set how long an on-going melt function is to last.
r17
Melt period
NightSetback
OFF gives day operation
ON gives night operation
Alarm settings
Alarm Settings
The controller can give alarm in different situations.
When there is an alarm the light-emitting diodes (LED) will flash on the front panel of
EKA 162.
Delay on temperature alarm
If one of the two limit values A13 or A14 is exceeded, a timer function will be started.
The alarm will only become visible when a set time delay is passed.
The time delay is set in minutes.
A03
Alarm delay
Time delay for door alarm
If the digital input is used for a door monitoring function (see definition in the ”Miscellaneous” section) an alarm will not be given until a given period with open door
has elapsed.
The time delay is set in minutes..
A04
Door Open del
Time delay for cooling
This time delay is used during start-up, during defrost, immediately after a defrost,
and when the ON function has been used. 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).
A12
Pulldown del
A13
High Lim Air
A14
Low Lim Air
Reset alarm
The function resets all alarms when set
in pos. ON.
EKC error
Here you can read the alarm status.
Compressor control
Compressor function
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.
Min. ON-time (in minutes)
c01
Min. On time
Min. OFF-time (in minutes)
c02
Min. Off time
EKC 414A
Manual
RS8CK502
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Danfoss
05-2005
5
Defrost
A defrost can be started in five ways: via the data communication, via a signal at the
DI input, via clock module and setting, via an internal timer function or by a pushon
the lower of the displays’ control buttons. It is recommended to set the timer function even if one of the three first options is used. The timer function will then act as
safety period if the original defrost start should be overdue. The defrost itself can be
stopped based on time, or a temperature sensor can be placed on the evaporator so
that defrost can be stopped based on temperature value.
Defrost control
Defrost stop temperature
If a defrost sensor has been mounted on the evaporator, the defrost can be stopped
at a given temperature. The temperature value is set. If a defrost sensor has not been
mounted, the defrost will be stopped based on time.
Cf. d4 and d10.
Interval between defrost starts
It is recommended to start the defrost via the data communication or via a signal at
the DI input and then use this setting as precautionary measure if the normal defrost
signal should fail to appear (the time interval must be greater than the time between
two normal defrost starts).
But the interval function may also be used as a simple defrost start function where
the defrost is started periodically, say, every eight hours. If defrost is to be performed
at specific times of the day, the setting must be made accordingly. (The internal counter is zeroset after a power failure).
The time interval is reset at each defrost start.
Max. defrost duration
If you have chosen to stop defrost based on temperature, this setting will constitute a
safety period where the defrost will be stopped if no stop based on temperature has
taken place by then. If you have selected defrost stop based on time, this setting will
be the defrost time.
Time displacement of defrost cutins during start-up
The function is only relevant, if you have several refrigeration appliances or groups
where you would like the defrost to be displaced. This function is also only relevant if
you have selected defrost with interval start (d03).
The function delays the defrost by the set number of minutes, but for the very first
defrost it only does it when the controller has been energised.
Drip-off time
Here you set the time that is to elapse from the end of a defrost and until compressor
is to be resumed. (The time when water is dripping off the evaporator).
Fan start delay after defrost
Here you set the time that is to elapse from when the compressor is started after a
defrost and until the fan may resume operation. (The time where the water is “bound”
to the evaporator).
d02
Def. Stop Temp
d03
Def.Interval
d04
Max Def.time
d05
Time stagg.
d06
Drip Off time
d07
Fan Start Del.
Fan start temperature
The fan may also be started a little earlier than mentioned under “Delayed fan start
after defrost” if the defrost sensor registers a permissible value. Here you can set the
value for when the fan may start.
d08
Fan Start Temp.
Fan cut in during defrost
Here you set whether the fan is to operate during defrost.
If the ON function is selected, the settings in d07 and d08 are not relevant
Defrost sensor
Here you set whether the defrost sensor is to beS4, S5 or if there is not going to be a
defrost sensor at all.
0: S4 (Sout)
1: S5 (Sdef )
2: No defrost sensor. Defrost stop is based on time.
Defrost at power up
Here you set whether the controller is to start with a defrost when power is supplied
to the controller during start-up or after a power failure. The function ensures that
defrost will be performed on weak networks with frequent power failures.
d09
Fan During Def.
d10
Def Stop Sensor
d13
Def. At Power Up
Def. start
Here you can start a manual defrost
Hold After Def.
Shows ON when the controller is
operating with coordinated defrost.
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Manual
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Danfoss
05-2005
EKC 414A
Injection control
Injection control
Max. value for the superheat reference
Min. value for the superheat reference
MOP temperature
If no MOP function is required, select pos. OFF
n09
n10
Max SH
n11
MOP temp.
(A value of 15 corresponds to OFF)
Min SH
The settings in n13 to n18 are adapted to evaporators in central plants. In decentralised plants it may be necessary to make
adjustments. HOWEVER, they should only be carried out by trained staff.
AKV valve’s time period in seconds
Should only be set to a lower value if it is a decentralised plant and the suction pressure fluctuates a lot and in line with the opening of the AKV valve.
The value should only be changed by specially trained staff.
n13
AKV period
Adaptive control
With adaptive control the controller will itself adjust the valve’s opening degree so
that the evaporator all the time has the minimum permissible superheat (MSS). If the
function is set in pos. OFF, the settings in n16 and n17 will be used in the control. The
OFF setting should only be made by specially trained staff
n14
Adap. inject
Average opening degree
The controller registers the valve’s opening degree continuously and uses the value in
its regulation (in the KP factor for the injection algorithm).
The value should only be changed by specially trained staff.
n16
AKV Dim
Start-up time for signal reliability
The controller uses the value for each thermostat cutin where the evaporator is to be
charged quickly.
(In a decentralised plant the value must be lower than the factory setting – a high
value may result in a flooded evaporator).
The value should only be changed by specially trained staff.
Stability factor for regulation of superheat
With a higher value the control function will allow a greater fluctuation of the superheat before the reference is changed.
The value should only be changed by specially trained staff.
n17
Start OD%
n18
Stability
Forced closing
The AKV valve will close when the function is set in pos. ON.
(It will also close when the "Inject ON " input is de-energised).
n36
Inject Close
EKC 414A
Manual
RS8CK502
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Danfoss
05-2005
7
Fan control
Fan control
In addition to the fan functions during defrost the fans may also be stopped as a function of the compressor operation and if necessary a door function.
Fan stop on compressor cut out
Here you can select whether the fan must be stopped when the compressor is cut
out.
F01
Fan stop co
Delayed 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 after the compressor has stopped. Here you 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, start-up after a defrost, or if the AKV-ON
signal is interrupted.
With setting +50°C the function is interrupted.
Miscellaneous
F04
Fan Stop Temp.
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
Delay Of Outp.
Digital input control
The controller has a digital input “DI” which can be used for one of the following functions:
1) Door alarm. Connect a door switch and the controller will register when the DI
input is open. Subsequently, the controller will allow the function ”door alarm”.
2) Defrost. A contact function with returm spring is fitted. 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).
3) Night operation. Connect a switch. When the switch is cut in, there will be night
operation.
4) Main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when the input is put in pos. OFF.
5) Coordinated defrost with cable connections. See wiring diagram. (If coordinated
defrost via data communication is used, setting 5 must not be used).
0) Setting should be 0 (OFF) when the DI input is not used
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.
These settings can only be made when a data communication module has been
mounted in the controller and the installation of the data communication cable has
been completed.
This installation is mentioned in a separate document “RC.8A.C”..
o02
Di 1 Config
The address is set between 1 and 60
The address is sent to the gateway when the menu is set in pos. ON
Access code
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
OFF.
o03
o04
o05
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05-2005
Miscellaneous
EKC 414A
Sensor type (S3, S4, S5) = (Sin, Sout, Sdef )
Normally a Pt 1000 sensor with great signal accuracy is used. But you may also use a
PTC sensor (R25 = 1000) in special situation.
Frequency
Set the net frequency.
o06
Coordinated defrost with wire connections
Connections to the controller must be made as described on page 12.
Off: No coordinated defrost with wire connections
1: Master (only one controller in the group can be master)
2: Slave
If output (DO) is not used, the setting must be 0.
If the function is set in the slave prior to being set in the main controller, this will start
a defrost. This can be avoided by setting the main controller before the slave. It will
however depend on the setting at the DI input.
o13
DO 1 Config
Not used = 0
Master = 1
Slave = 2
Max. standby time after coordinated defrost
When a controller has completed a defrost it will wait for a signal which tells that the
refrigeration may be resumed. If this signal fails to appear for one reason or another,
the controller will itself start the refrigeration when this standby time has elapsed.
Select sensor signal for the display
With a % value you can set whether the display should show the S3 temperature, the
S4 temperature or a mixture of the two.
With setting 0%, only the S3 temperature is shown.
With setting 100%, only the S4 temperature is shown.
o16
Max Hold time
o17
Disp. Sout %
Manual control of outputs
In connection with service the individual relay outputs and the digital output can be
changed to pos. ON.
Off: No override
1: Compressor relay is ON
2: Defrost relay is ON
3: Fan relay is ON
4: Alarm relay is OFF
5: Signal to slave controllers that defrost is required
6: The AKV output is ON
7: Light relay is On
Remember to reset the function to OFF when forced control is terminated.
o18
Pressure transmitter’s working range
According to the pressure a pressure transmitter with a given working range is used.
This working range must be set in the controller (e.g. –1 to 12 bar).
Min. value
Max. value
"Inject ON" settings
Here you define which functions are to be active when the "Inject ON" input does not
receive signals or when ”n36” is put in pos. ON:
1: The fan relay is activated. There is alarm monitoring.
2: The fan relay is not activated. There is alarm monitoring.
3: The fan relay is not activated. There is no alarm monitoring.
4: The fan relay is activated. There is no alarm monitoring.
For 3 and 4 applies that a defrost cannot be started (any defrost in progress will be
terminated in the normal way).
If the “Inject on” input is not wired the setting must be selected to 5, 6, 7 or 8.
The function is as mentioned under 1-4. (1=5, etc.).
Refrigerant setting
Before refrigeration is started, the refrigerant must be defined. You may choose between the following refrigerants
1=R12. 2=R22. 3=R134a. 4=R502. 5=R717. 6=R13. 7=R13b1. 8=R23. 9=R500.
10=R503. 11=R114. 12=R142b. 13=Userdefined. 14=R32. 15=R227. 16=R401A.
17=R507. 18=R402A. 19=R404A. 20=R407C. 21=R407A. 22=R407B. 23=R410A.
24=R170. 25=R290. 26=R600. 27=R600a. 28=R744. 29=R1270. 30=R417A
Warning: Wrong selection of refrigerant may cause damage to the compressor.
EKC 414A
Manual
RS8CK502
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Danfoss
05-2005
o12
Sensor Config
Pt=0
PTC =1
50 / 60 Hz
(50=0, 60=1)
020
o21
o29
MinTransPress
MaxTransPress
Inject Cl. Cfg
o30
Refrigerant
9
Service
Service
A number of controller values can be printed for use in a service situation
Read the temperature at the S5 (Sdef ) sensor (calibrated value)
Read status of input DI
Read the duration of the ongoing defrost or the duration of the last completed
defrost.
Read the temperature at the S3 (Sin) sensor (calibrated value)
u09
u10
u11
u12
Sdef temp.°C
DI 1 status
Defrost time (Depicted in the ”Defrost
control” illustration)
Sin air temp
Read status at the day-/night operation (night operation: on/off )
u13
Read status at the ON input
Read status at the DO output
Read the temperature at the S4 (Sout) sensor (calibrated value)
u14
u15
u16
Night Cond (Depicted in the ”Thermostat control” illustration)
Inject ON
DO 1 status
Sout Air Temp.
Read the temperature according to which the thermostat function regulate
u17
Ther. air
Read the ongoing cutin time for the thermostat or the duration of the last completed
cutin
Read the temperature at the S2 sensor
u18
Ther. runtime (Depicted in the ”Thermostat control” illustration)
S2 temp.
Read superheat
u21
Read the control’s actual superheat reference
u22
Read the valve’s actual opening degree
Read the evaporating pressure in bar
Read the evaporating pressure in degrees
u23
u25
u26
u20
SH (Depicted in the ”Injection control”
illustration)
SH ref. (Depicted in the ”Injection
control” illustration)
AKV OD%
Evap. pres. P0
Evap. temp. T0
Compressor relay
Here you can read the relay status.
Defrost relay
Here you can read the relay status.
Fan relay
Here you can read the relay status.
Alarm relay
Here you can read the relay status.
Light relay
Here you can read the relay status.
Factory setting
If you need to zeroset the controller and reset the factory-set values, do it like this:
switch off the supply voltage – keep both buttons pushed in at the same time as you
reconnect the supply voltage.
Manual control
Set in pos. OFF whereupon the
required output can be force-controlled. Remember to reset the function
to OFF.
AKV OD% set
Alarm set
Comp. set
Defrost set
Fan set
Light set
DO1 set
Fault message
Alarm text
In an error situation the LED’s on theEKA 162 will flash and the relay will be activated.
If you push the top button in this situation you can see the alarm report in the display.
There are two kinds of error reports - it can either be an alarm occurring during the
daily operation, or there may be a defect in the installation.
A-alarms will not become visible until the set time delay has expired.
E-alarms, on the other hand, will become visible the moment the error occurs.
(An A alarm will not be visible as long as there is an active E alarm).
High temperature alarm
Low temperature alarm
The importance of the individual
alarms can be defined with a setting
(0, 1, 2 or 3) in the menu Alarm destinations. See AKM literature.
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Manual
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Danfoss
05-2005
A1
A2
High Temp. air
Low temp. air
EKC 414A
Door alarm
The ”o16” function is activated during a coordinated defrost
Control problem
No refrigerant selected
Defrost stopped based on time instead of, as wanted, on temperature
A4
A5
A10
A11
-
Door alarm
Max Hold Time
Inject. prob.
No Rfg. sel.
Max Def. Time
Fault in controller
Defrost sensor disconnected
Short-circuited defrost sensor
Change battery and check clock
S4 (Sout) sensor disconnected
Short-circuited S4 (Sout) sensor
S3 (Sin) sensor disconnected
Short-circuited S3 (Sin) sensor
S2 sensor disconnected
Short-circuited S2 sensor
Pressure transmitter error
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. (The operating status cannot be
seen, however, if there is an active A or E alarm).
The status number means the following:
Waiting for end of the coordinated defrost
E1
E4
E5
E6
E7
E8
E9
E10
E15
E16
E20
Contr. fault
Sdef error
Sdef error
Sout error
Sout error
Sin error
Sin error
S2 error
S2 error
P0 inp. error
(Measurement)
EKC state
(The operating status can be read in
the AKM programme, even if there is
an active A or E alarm).
S1
1
When the compressor is operating it must run for at least x minutes.
S2
2
When the compressor is stopped, it must remain stopped for at least x minutes.
S3
3
The evaporator drips off and waits for the time to run out
S4
4
Refrigeration stopped by the internal or external start/ stop
S10
10
Thermostat is cut-out
S11
11
Defrost sequence. Defrost in progress
S14
14
Defrost sequence. The fan waits for the time to run out
S15
15
Refrigeration stopped due to open ON input or stopped regulation
S16
16
Door is open. DI input is open
S17
17
Melt function in progress. Refrigeration is interrupted
S18
18
Modulating thermostat control
S19
19
Emergency cooling due to sensor error
S20
20
Start-up phase 2. Evaporator being charged
S22
22
Adaptive control
S23
23
Start-up phase 1. Signal reliability from sensors is controlled
S24
24
Manual control of outputs
S25
25
No refrigerant selected
S26
26
Delay on outputs during start-up
Password required. Set password
non
PS
0
EKC 414A
Manual
RS8CK502
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05-2005
11
Connection
Cable length between an external display and EKC 414A must be max. 15 m
AKS 32R:
1= Black
2= Blue
3= Brown
Coordinated defrost via cable connections
1
2
4
1
2
4
1
2
4
Coordinated defrost via data communication
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Manual
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05-2005
EKC 414A
Necessary connections
S2
Pt 1000 ohm sensor. Refrigeration outlet (S2)
S3
Air temperature sensor before evaporator (S3)
S4
Air temperature sensor after evaporator (S4)
It is application determined whether S3 or S4 or both has
to be mounted.
S3, S4 and S5 may either be Pt 1000 ohm or Ptc 1000 ohm,
but they must all be of the same type.
20 - 22 Signal from pressure transmitter type AKS 32R
23 - 24 Supply voltage 230 V 50/60 Hz
25, 26 Protective earth connection
27 - 28 Expansion valve type AKV (230 V d.c.)
40 - 41 230 V signal for start/stop of regulation
(the connection can be left out with setting in o29).
Application dependent connections
1-2
Output signal on terminal 2, if there is coordinated defrost with cable connections
3-4
Input signal from a contact function or signal on terminal
4, if there is coordinated defrost with cable connections
D1
Possibility of connecting an external display type EKA
161
D2
Possibility of connecting an external display with operating knobs type EKA 162
S5
Defrost sensor on the evaporator (S5). (The sensor can
either be Pt 1000 ohm or Ptc 1000 ohm)
29 - 31 Alarm relay
There is connection between 29 and 31 in alarm situations and when the controller is de-energised
32 - 33 Compressor relay
34 - 35 Defrost relay
36 - 37 Fan relay
38 - 39 Light relay
There is connection between 38 and 39
when control performed during day operation
43 - 44 Data communication
It is important that the installation of the data communication cable be done correctly. Cf. separate literature No.
RC.8A.C...
Gateway AKA 243B must be version 5.3x or newer version.
The wire switch to the left of terminal 43 will terminate
with 120 ohm in closed position.
Installation considerations
Accidental damage, poor installation, or site conditions, can give
rise to malfunctions of the control system, and ultimately lead to a
plant breakdown.
Every possible safeguard is incorporated into our products to
prevent this. However, a wrong installation, for example, could still
present problems. Electronic controls are no substitute for normal,
good engineering practice.
Danfoss wil not be responsible for any goods, or plant components, damaged as a result of the above defects. It is the installer's
responsibility to check the installation thoroughly, and to fit the
necessary safety devices.
Special reference is made to the necessity of signals to the
controller when the compressor is stopped and to the need of
liquid receivers before the compressors.
Your local Danfoss agent will be pleased to assist with further
advice, etc.
Plug
The controller comes factory-mounted with one part of a plug
connection. The other part is of the type Phoenix and AMP
with the following type designations:
Connection Type
1-2:
MC1,5/2-ST-3,81
3-4:
""
Display:
AMP ital mod 2, housing 280 359,
crimp contact 280 708-2
Display:
""
S2:
AMP ital mod 2, housing 280 358,
crimp contact 280 708-2
S3:
""
S4:
""
S5:
""
20-22:
MC1,5/3-ST-3,81
23-25:
MSTB2,5/3-ST-5,00
26-28:
""
29-31:
""
32-33:
MSTB2,5/2-ST-5,00 or MSTB2,5/8-ST-5,00
34-35:
""
36-37:
""
38-39:
""
40-41:
MC1,5/2-ST1-5,08
43-44:
MC1,5/2-ST-3,81
The screw terminals (Phoenix plug) are not bypacked for some of the code
numbers.
Sensors and display supplied with plug.
EKC 414A
Manual
RS8CK502
©
Danfoss
05-2005
13
Operation
Operation of the controller can take place
via data communication or from a separate display. Operation via data communication may be performed via the AKM
programme and a text that can be seen in
the earlier section ”Survey of functions”.
Operation from EKA 162 is described
below:
EKA 162
EKA 161
Display with operating buttons and LED
indication of relay
functions:
Display for mounting on refrigeration
appliance.
Refrigeration
AKV valve
The buttons (EKA 162 only)
When you want to change a setting, the
two 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 two buttons simultaneously.
When you have changed the value, save
the new value by once more pushing the
two buttons simultaneously.
Or briefly:
Gives access to the menu (or
cutout an alarm)
The showing in the
display follows the
showing in EKA
162
Gives access to changes
Temperature setting
When it is the temperature setting you
wish to change, do not enter the menu.
Push both buttons simultaneously and you
will be allowed to change the temperature
reference when the display answers back
by flashing.
Forced control
In addition to the normal way of operating
the controller you are now able to perform a number of forced control functions
which you start, as follows:
- Cut out alarm relay / check alarm code
• Push the upper button
- Read the defrost stop temperature
• Push the lower button
- Manual start or stop of defrost
• Push the lower button for four seconds
Saves a change
Defrost
Fan
Examples of operations
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Or examples put in another way:
Set the temperature
1. Push the two buttons simultaneously
2. Push one of the buttons and select the
new value
3. Push both buttons again to conclude
the setting
Set a menu
1. Push the upper button until a parameter is shown
2. Push one of the buttons and find the
parameter you want to change
3. Push both buttons simultaneously until
the parameter value is shown
4. Push one of the buttons and select the
new value
5. Push both buttons again to conclude
the setting
Examples of displays:
-d- Display going on
180 Sensor has not been mounted
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Manual
RS8CK502
©
Danfoss
������
05-2005
EKC 414A
Menu survey
SW: 1.1x
Para
Min.
meter
Function
Normal display
Shows the temperature at the selected
sensor
Define view in O17
If you wish to see selected defrost stop
temperature, give the lower button a brief
push (1 sec.)
no= stop on temperature not selected
Thermostat
Factory
settings
Max.
-
°C
Start-up time for signal reliability
Should only be changed by trained staff.
Stability factor for superheat control.
Changes should only be made by trained
staff
Forced closing.. AKV valve shut in pos. ON
n17
5%
70%
30.0
n18
0
10
4
n36
OFF
ON
OFF
F01
Fan
-
no
yes
no
Delayed fan stop when compressor is cut out F02
Safety function. The fan stops if the S5 temF04
perature reaches this value
Miscellaneous
0 min
30 min
0
-50.0
50.0/off
50.0
o01
0 sec.
600 sec
5
o02
OFF
5
0
Fan stop on compressor cut out
°C
Differential
Max. limitation of thermostat’s setting
temperature
Min. limitation of thermostat’s setting
temperature
Temperature unit (°C/°F)
r01
0.1 K
10.0 K
2.0
r02
-49°C
50°C
50.0
r03
-50°C
49°C
-50.0
r05
°C
°F
0/°C
Correction of signal from S4 (Sout)
r09
-10.0 K
10.0 K
0.0
Correction of signal from S3 (Sin)
r10
-10.0 K
10.0 K
0.0
Delay of output signal after start-up
Define digital input signal (DI:
OFF=not used, 1=Door alarm, 2=defrost
start, 3=Night operation, 4=External start/
stop, 5 = Coordinated defrost with cable
connections
Network address (range = 0-60)
o03
0
990
0
Start/Stop of refrigeration
Reference displacement during night operation
Define thermostat function
1=ON/OFF, 2=Modulating
Definition and weighting, if applicable, of
thermostat sensors
100%=S4 (Sout), 0%=S3 (Sin).
The thermostat temperature can be seen
in U17
Time between melt periods
r12
OFF
ON
OFF
ON/OFF switch (service-pin message)
o04
OFF
ON
OFF
r13
-20.0 K
20.0 K
0.0
Access code
o05
OFF
100
OFF
Used sensor type for S3, S4 and S5 (Pt / PTC)
o06
Pt
Ptc
0/Pt
o12
50 Hz
60 Hz
50
o13
0
2
0
o16
1 min
30 min
20
o17
0%
100%
Duration of melt periods
Set supply voltage frequency
Define digitalt output signal (DO:
0=not used
Coordinated defrost with cable connections:
1=Master, 2= Slave
Max. standby time after coordinated defrost
Display S4 % (Sout)
0%=S3 (Sin)
100%=S4 (Sout)
Manual control of outputs:
OFF=No override
1: Compressor reay is ON
2: Defrost relay is ON
3: Fan relay is ON
4: Alarm relay is OFF
5: DO output is ON
6: AKV output is ON
7: Light relay is ON
When manual control is terminated, the setting must be changed to OFF
Pressure transmitter working range – min.
value
Pressure transmitter working range – max.
value
Inject-ON definition
When the ON input is cut out refrigeration
is stopped.
Here you define how the fan relay and the
alarm function are to act:
1 = Fan relay = ON, alarm monitoring active
2 = Fan relay = OFF, alarm monitoring active
3 = Fan relay = OFF, no alarm monitoring
4 = Fan relay = ON, no alarm monitoring
5 to 8= as 1 to 4, but without connection to
terminal 40-41.
Refrigerant setting
1=R12. 2=R22. 3=R134a. 4=R502. 5=R717.
6=R13. 7=R13b1. 8=R23. 9=R500.
10=R503. 11=R114. 12=R142b. 13=User
defined. 14=R32. 15=R227. 16=R401A.
17=R507. 18=R402A. 19=R404A. 20=R407C.
21=R407A. 22=R407B. 23=R410A. 24=R170.
25=R290. 26=R600. 27=R600a. 28=R744.
29=R1270. 30=R417A
o18
OFF
7
OFF
020
-1 bar
5 bar
-1
021
6 bar
36 bar
12
o29
1
8
5
o30
0
30
0
r14
1
2
1
r15
0%
100%
100
r16
0h
10 h
1
r17
0 min
10 min.
5
Alarm time delay
A03
0 min.
120 min 30
Door alarm time delay
A04
0 min.
90 min.
Time delay during cooling
A12
0 min.
240 min 120
High alarm limit
Low alarm limit
Compressor
Min. ON-time
Min. OFF-time
Defrost
Defrost stop temperature
Interval between defrost starts
Max. defrost duration
Time displacement of defrost cut-ins during
start-up
Drip-off time
A13
A14
-50°C
-50°C
50°C
50°C
5.0
-30.0
c01
c02
0 min
0 min
50 min
50 min
0.0
0.0
d02
d03
d04
0
OFF
0
25°C
6.0
48 h
8
180 min 45
d05
0
240 min 0
d06
0
60 min
0
Fan start delay after defrost
d07
0
60 min
0
Fan start temperature
d08
-15
0°C
-5.0
Fan cut-in during defrost (yes/no)
d09
no
yes
no
Defrost sensor
0=S4 (Sout) , 1=S5 (Sdef), 2=non. Stop on time
d10
0
2
2
Defrost at power up
d13
no
yes
no
RTC module (if installed)
see RTC instructions
t01 to
t16
Alarm
60
Injection control function
Max. value of superheat reference
n09
3.0 K
15.0 K
12.0
Min. value of superheat reference
n10
3.0 K
10.0 K
3.0
MOP temperature
AKV valve’s time period
Should only be changed to OFF by trained
staff
Adaptive control
Should only be changed to OFF by trained
staff
Average opening degree
Should only be changed by trained staff
n11
-50.0°C
15°C/off 15°C
n13
3 sec.
6 sec.
6
n14
OFF
ON
on
n16
10%
75%
30.0
EKC 414A
Manual
RS8CK502
©
Danfoss
05-2005
100
15
Continued from previous page
Parameter
The controller can give the following messages:
E1 Error message
Fault in controller
E4
Defrost sensor disconnected
Service
The following readouts can be performed via the belonging parameter
°C
Defrost sensor S5 Sdef
u09
Status on DI-input
u10
Defrost time
u11
min.
Air temperature S3 (Sin)
u12
°C
Status on night operation (on or off )
u13
Status on ON-input
u14
Status on DO-output
u15
Air temperature S4 (Sout)
u16
°C
Thermostat temperature
u17
°C
Thermostat cut-in time
u18
min.
Temperature at S2
u20
°C
Superheat
u21
K
Superheat reference
u22
K
AKV valve’s actual opening degree
u23
%
Evaporating pressure
u25
bar
Evaporating temperature
u26
°C
E5
Shortcircuited defrost sensor
E6
Change battery and check clock
E7
S4 (Sout) sensor disconnected
E8
Shortcircuited S4 (Sout)
E9
S3 (Sin) sensor disconnected
E10
Shortcircuited S3 (Sin) sensor
E15
S2 sensor disconnected
E16
Shortcircuited S2 sensor
E20
A1
AKS 32R fault
Alarm message
Low temperature alarm
A4
Door alarm
A5
Function ”O16” activated during a coordinated
defrost
A10
Control problem
A11
S1
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 both buttons depressed at the same time as you reconnect the supply voltage
No refrigerant selected
Status message
Manual
RS8CK502
©
Danfoss
Waiting for end of the coordinated defrost
S2
Waiting for end of compressor ON time
S3
Waiting for end of compressor OFF time
S4
Defrost sequence. Evaporator drips off and
waits for the time to expire
S10
Refrigeration stopped by the internal or external start/stop function
S11
Thermostat cut out
S14
S15
S16
Defrost sequence. Defrost in progress
Defrost sequence. Fan waiting for time to elapse
Refrigeration stopped due to open ON input
S17
Door is open. Input DI is open
S18
Melt function in progress (refrigeration interrupted)
S19
Modulating thermostat control
S20
Emergency refrigeration due to sensor error
S22
Start-up phase 2. Evaporator is charged
S23
Adaptive control
S24
Start-up phase 1. Signal reliability from the sensors is checked
S25
Manual control of outputs
S26
No refrigerant selected
non
Time delay on outputs during start-up
PS
16
High temperature alarm
A2
05-2005
Password required. Set password
EKC 414A
Data
Ordering
Supply voltage
230 V +10/-15%, 50/60 Hz, 5 VA
Sensors
Pt 1000 ohm for refrigerant temperatures
Pt 1000 ohm or PTC (R25 = 1000 ohm) for air temperatures
Controller sensor
system
Display/
operation
1 digital
input
Display unit with operating buttons
Measuring range
-60 to +50°C
Accuracy
±0.5°C
for sensor temperature =
-35 to +50°C
The controller has no display or operating buttons on
front panel.
Operation takes place via a separate, connected display or via data communication
It is possible to connect two displays with 0.1% reading
accuracy in the measuring range:
EKA 161, LED, three digits
EKA 162, LED, three digits, two operating buttons
If a contact function is connected, ir can be used for
door alarm, defrost start, night operation or start/stop
of the regulation
If other EKC 414 units are connected, coordinated
defrost can be performed via cable connections
May in conjunction with the digital input be used for
coordinated defrost via cable connections
230 V input
0 V: regulation stopped. The compressor relay, the defrost relay, the fan relay and the light relay are cut out.
230 V a.c.: regulation
(The function can be opted out).
Sensor conSensors with AMP plug
nection
AKV connecMax. 1
tion
Environments
EKC 414A
084B8002
EKA 161
084B7019
EKA 162
084B7039
Realtime clock
084B7179
084B7097
EKA 172
084B7069
References
Description
Type
Temperature sensor Pt 1000
with AMP plug
AKS 11
Temperature sensor Ptc 1000
with AMP plug
EKS 111
Pressure transmitter
AKS 32R
Expansion valve
AKV
Please see catalogue/
technical brochure
RK.0Y.G
RK.0Y.G / RD.8A.B
Montage
Compressor relay
SPST NO, Imax. = 6 A ohmic/ 3 A
AC 15* inductive
Defrost relay
SPST NO, Imax. = 6 A ohmic / 3 A
AC 15* inductive
Fan motor relay
SPST NO, Imax. = 6 A ohmic / 3 A
AC 15* inductive
Light relay
SPST NO, Imax. = 6 A ohmic / 3 A
AC 15* inductive
Alarm relay
SPDT, Imax. = 6 A ohmic / 3 A AC
15* inductive
When the unit is mounted on a wall,
the two points on the DIN fastening are
cut off.
0 to +55°C, During operations
-40 to +70°C, During transport
20 - 80% Rh, not condensed
EKC 414A
No shock influence / vibrations
Mounting
On DIN rail or on wall
Density
IP 20
Weight
0.4 kg
Approvals
Code no.
Type
Cable for display unit (2 m with plug,
24 pcs)
Cable for display unit (6 m with plug,
24 pcs)
1 digital
output
Relays
Description
Refrigeration control controller with
plug connections and data communication
Display unit
EU Low Voltage Directive and EMC demands re CEmarking complied with.
LVD-tested acc. to EN 60730-1 and EN 60730-2-9
EMC-tested acc. to EN 50081-1 and EN 50082-2
IP 20
*
AC 15 load acc. to EN 60947-5-1
Only for front mounting (IP 40)
Only connection via plugs
Display type EKA 161 / 162
EKC 414A
Manual
RS8CK502
©
Danfoss
05-2005
17
Data communication
This page contains a description of a few of the possibilities you
will have with data communication.
It is important that the installation of the data communication
cable is carried out correctly. Please refer to separate literature No.
RC.8A.C
Example
The controller has been
prepared for data communication.
The data communication
takes place via a two-core
twisted cable.
Up to 60 controllers may be
connected to one cable.
This cable is also connected to
a gateway.
The gateway can now be connected to a modem.
This gateway will now control
the communication to and
from the controllers.
When an alarm occurs from
one of the controllers, the
gateway will - via the modem
- make a phone call to the
service company.
It will collect temperature values and it will receive alarms.
When there is an alarm the
alarm relay will be activated for
two minutes.
At the service company a
modem, gateway and PC with
system software type AKM
have been installed.
All the controllers’ functions
can now be operated from the
various menu displays.
The programme will for example upload all the collected
temperature values once a day.
Example of menu display
Alarms
If the controller is extended
with data communication, it
will be possible to define the
importance of the transmitted
alarms.
The importance is defined with
the setting: 1, 2, 3 or 0. When
the alarm then arises at some
time, it will result in one of the
following activities:
• Measurements are shown at
one side and settings at the
other.
• With a simple change-over
the values can also be
shown in a trend diagram.
• You will also be able to see
the parameter names of the
functions on page 4-11.
• If you wish to check earlier
temperature measurements,
you can see them in the log
collection.
18
Manual
RS8CK502
©
Danfoss
1 = Alarm
The alarm message is sent off
with alarm status 1. This means
that the gateway with address
125 in the system will have its
alarm relay output activated
for two minutes. Later, when
the alarm ceases, the alarm
text will be retransmitted, but
now with status value 0.
05-2005
2 = Message
The alarm text is transmitted
with status value 2. Later, when
the “message” lapses, the alarm
text is retransmitted, but now
with status value 0.
3 = Alarm
As “1”, but the master gateway’s
relay output is not activated.
0 = Suppressed information
The alarm text is stopped at
the controller. It is transmitted
nowhere.
EKC 414A
EKC 414A
Manual
RS8CK502
©
Danfoss
05-2005
19
List of literature
Instructions
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.
20
Manual
RS8CK502
©
Danfoss
05-2005
RC-ET
RI.8G.R
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®.
EKC 414A
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