• The controller is used for temperature control refrigeration
appliances in supermarkets
• With many predened applications one unit will oer you many
options. Flexibility has been planned both for new installations
and for service in the refrigeration trade
Principle
The controller contains a temperature control where the signal
can be received from one or two temperature sensors.
The thermostat sensors are either placed in the cold air ow after
the evaporator, in the warm air ow just before the evaporator,
or both. A setting will determine how great an inuence the two
signals are to have on the control.
A measurement of the defrost temperature can be obtained
directly through the use of an S5 sensor or indirectly through
the use of the S4 measurement. Four relays will cut the required
functions in and out – the application determines which. The
options are the following:
• Refrigeration (compressor or relay)
• Fan
• Defrost
• Rail heat
• Alarm
• Light
• Fans for hotgas defrost
• Refrigeration 2 (compressor 2 or relay 2)
The dierent applications are described on page 6.
Advantages
• Many applications in the same unit
• The controller has integrated refrigeration-technical functions,
so that it can replace a whole collection of thermostats and
timers
• Can control two compressors
• Fixed MODBUS data communication
• Quick setup
• Two temperature references
• Digital inputs for various functions
• Clock function with super cap backup
• HACCP (Hazard Analysis and Critical Control Points)
- Temperature monitoring and registration of period with too
high temperature (see also page 19)
- Factory calibration that will guarantee a better measuring
accuracy than stated in the standard EN 441-13 without
subsequent calibration (Pt 1000 ohm sensor)
Data ..................................................................................................................... 26
Operation
Sensors
Up to two thermostat sensors can be connected to the controller.
The relevant application determines how.
A sensor in the air before the evaporator:
This connection is primarily used when control is based on area.
A sensor in the air after the evaporator:
This connection is primarily used when refrigeration is controlled
and there is a risk of a too low temperature near the products.
A sensor before and after the evaporator:
This connection oers you the possibility of adapting the
thermostat, the alarm thermostat and the display to the relevant
application. The signal to the thermostat, the alarm thermostat
and the display is set as a weighted value between the two
temperatures, and 50% will for example give the same value from
both sensors.
The signal to the thermostat, the alarm thermostat and the display
can be set independently of one another.
Defrost sensor
The best signal concerning the evaporator’s temperature
is obtained from a defrost sensor mounted directly on the
evaporator. Here the signal may be used by the defrost function,
so that the shortest and most energy-saving defrost can take
place.
If a defrost sensor is not required, defrost can be stopped based
on time, or S4 can be selected.
Control of two compressors
This control is used for controlling two compressors of the same
size. The principle for control is that one of the compressors
connects at ½ the dierential of the thermostat, and the other at
the full dierential. When the thermostat cuts in the compressor
with the fewest operating hours is started. The other compressor
will only start after a set time delay, so that the load will be
divided between them. The time delay has a higher priority than
the temperature.
When the air temperature has dropped by half the dierential the
one compressor will stop, the other will continue working and not
stop until the required temperature is achieved.
The compressors used must be of a type that is capable of starting
up against a high pressure.
Change of temperature reference
In an impulse appliance, for example, used for various product
groups. Here the temperature reference is changed easily with
a contact signal on a digital input. The signal raises the normal
thermostat value by a predened amount. At the same time the
alarm limits with the same value are displaced accordingly.
There are two digital inputs both of which can be used for the
following functions:
- Case cleaning
- Door contact function with alarm
- Starting a defrost
- Coordinated defrost
- Change-over between two temperature reference
- Retransmission of a contact’s position via data communication
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 rst push stops the refrigeration – the fans keep working
”Later”: The next push stops the fans
”Still later”: The next push restarts refrigeration
The dierent situations can be followed on the display.
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.
-++°C
1÷+Fan
2÷÷O
3++°C
Door contact function
In cold rooms and frost rooms the door switch can switch the light
on and o, start and stop the refrigeration and give alarm if the
door has remained open for too long.
Defrost
Depending on the application you may choose between the following defrost methods:
Natural: Here the fans are kept operating during the defrost
Electric: The heating element is activated
Brine: The valve is kept open so that the brine can ow
through the evaporator
Hot gas: Here the solenoid valves are controlled so that the
hot gas can ow through the evaporator
Start of defrost
A defrost can be started in dierent ways
Interval: Defrost is started at xed time intervals, say, every
eighth hour
Refrigeration time:
Defrost is started at xed refrigeration time inter-
vals, in other words, a low need for
refrigeration will ”postpone” the coming defrost
Schedule: Here defrost can be started at xed times of the
day and night. However, max. 6 times
Contact: Defrost is started with a contact signal on a digital
input
Network: The signal for defrost is received from a system unit
via the data communication
S5 temp In 1:1 systems the eciency of the evaporator can
be followed. Icing-up will start a defrost.
Manual: An extra defrost can be activated from the control ler’s lower-most button
Hot gas application
All the mentioned methods can be used at random – if just one
them is activated a defrost will be started.
There are two ways in which coordinated defrost can be arranged.
Either with wire connections between the controllers or via data
communication
Wire connections
One of the controllers is dened to be the controlling unit and
a battery module may be tted in it so that the clock is ensured
backup. When a defrost is started all the other controllers will
follow suit and likewise start a defrost. After the defrost the individual controllers will move into waiting position. When all are in
waiting position there will be a change-over to refrigeration.
(If just one in the group demands defrost, the others will follow
suit).
Defrost via data communication
Defrosting is started by the override function in a system manager, which also coordinates the defrosting stop.
Defrost on demand
1 Based on refrigeration time
When the aggregate refrigeration time has passed a xed 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 work in 1:1 systems
Max. 10
System manager
Extra module
The controller can afterwards be tted 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.
External display
If an external display is connected to the controller, data communication can also be connected, though this requires the installation of a separate data communication module.
Here is a survey of the controller’s eld of application.
A setting will dene the relay outputs so that the controller’s
interface will be targeted to the chosen application.
On page 20 you can see the relevant settings for the respective
wiring diagrams.
S3 and S4 are temperature sensors. The application will determine whether either one or the other or both sensors are to be
used. S3 is placed in the air ow before the evaporator. S4 after
the evaporator.
A percentage setting will determine according to what the
control is to be based. S5 is a defrost sensor and is placed on the
evaporator.
DI1 and DI2 are contact functions that can be used for one of the
following functions: door function, alarm function, defrost start,
external main switch, night operation, change of thermostat reference, appliance cleaning, forced refrigeration or coordinated
defrost. See the functions in settings o02 and o37.
Refrigeration control with one compressor
The functions are adapted to small refrigeration systems which
either may be refrigeration appliances or cold rooms.
The three relays can control the refrigeration, the defrost and the
fans, and the fourth relay can be used for either alarm function,
light control or rail heat control
• The alarm function can be linked up with a contact function
from a door switch. If the door remains open longer than allowed there will be an alarm.
• The light control can also be linked up with a contact function
from a door switch. An open door will switch on the light and
it will remain lit for two minutes after the door has been closed
again.
• The rail heat function can be used in refrigeration or freezing
appliances or on the door’s heating element for frost rooms.
The fans can be stopped during defrost and they may also follow
a door switch’s open/close situation.
There are several other functions for the alarm function as well
as the light control, rail heat control and fans. Please refer to the
respective settings.
1
2
Hot gas defrost
This type of connection can be used on systems with hotgas
defrost, but only in small systems in, say, supermarkets – the
functional content has not been adapted to systems with large
charges. Relay 1’s change-over function can be used by the
bypass valve and/or the hot gas valve.
Relay 2 is used for refrigeration.
This group of applications can be used if the controller is to cut
two compressors in and out.
The functions can be compared with wiring diagrams 1 to 3, but
instead of controlling fans the relay is here used for compressor
2.
The two compressors must be of the same size. When the
controller demands refrigeration it will rst 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 operation time will be
cut out.
If the running compressor does not manage to reduce the temperature to the cutout point, the other compressor will be cut in
again. This happens when the temperature reaches the top part
of the dierential. If the temperature is instead ”stuck” in the differential for two hours, there will be a change-over between the
two compressors so that the operating time can be equalised.
The two compressors must be of a type that can start up against
a high pressure.
The compressors’s settings for ”Min On time” and ”Min O time”
will always have top priority during normal regulation. But if one
of the override functions is activated, the ”Min On time” will be
disregarded.
5
6
7
If the controller is to cut 2 compressor and 1 fan in and out, relay
4 must cut the fan in and out.
This function is activated in application 10.
Simple refrigeration with defrost
This application can be used where there is only regulation of
refrigeration and defrost.
Heating function
This application is the same as under 1, but a heating function
has been added which protects the unit against too low temperature. The defrost function’s heating element is here used for
heating.
10
8
9
This application is used where the temperature can go below
the set cutout temperature for the refrigeration. To ensure that
the temperature will not become too low the heating element is
activated x degrees below the reference value.
The S3 sensor must be mounted. It supplies the signal when
there is heating.
Normally the temperature value from one of the two thermostat sensors S3 or S4 or a
mixture of the two measurements is displayed.
In o17 the ratio is determined.
ThermostatThermostat 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”
Dierential
When the temperature is higher than the reference + the set dierential, the compressor relay will be cut in. It will cut out again when the temperature comes down to
the set reference.
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.
To avoid a too high setting of the set point, the max. allowable reference value must
be lowered.
To avoid a too low setting of the set point, 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 oset 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 S4
Compensation possibility through long sensor cable
Correction of signal from S3
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.
Start / stop of refrigeration can also be accomplished with the external switch function connected to a 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.)
Selection of thermostat sensor
Here you dene 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.
(For application 9 and S3 sensor must be used)
Heating function
The function uses the defrost function’s heating element for raising the temperature.
The function enters into force a number of degrees (r36) below the actual reference
and cuts out again with a dierential of 2 degrees. Regulation is carried out with
100% signal from the S3 sensor. The fans will be operating when there is heating. The
fans and the heating function will stop if door function has been selected and the
door is opened.
Where this function is used an external safety cutout should also be installed, so that
superheating of the heating element cannot take place.
Remember to set D01 to electrical defrosting.
Parameter by operation via data
communication
Display air (u56)
Cutout °C
r01Dierential
r02Max cutout °C
r03Min cutout °C
r04Disp. Adj. K
r05Temp. unit
°C=0. / °F=1
(Only °C on AKM, whatever the setting)
When the function is changed to ON the thermostat reference will be displaced by
the value in r40. Activation can also take place via input DI1 or DI2 (dened in o02 or
o37).
r39Th. oset
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
AlarmAlarm settings
The controller can give alarm in dierent situations. When there is an alarm all the
light-emitting diodes (LED) will ash on the controller front panel, and the alarm relay
will cut in.
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 dened in o02 or in o37.
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 DI1 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The
function is dened in o02.
Delay of a DI2 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The
function is dened in o37
Signal to the alarm thermostat
Here you have to dene the ratio between the sensors which the alarm thermostat
has to use. S3, S4 or a combination of the two.
With setting 0% only S3 is used. With 100% only S4 is used
CompressorCompressor 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)c01Min. On time
Min. OFF-time (in minutes)c02Min. O time
r40Th. oset K
Night setbck
(start of night signal)
Forced cool.
(start of forced cooling)
With data communication the importance of the individual alarms can be
dened. Setting is carried out in the
“Alarm destinations” menu.
Settings indicate the time that has to elapse from the rst relay cuts in and until the
next relay has to cut in.
Reversed relay function for D01
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
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, as 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 relays must draw an external contactor (zero-crossing cancelled)
The LED on the controller’s front will show whether refrigeration is in progress.Comp Relay
DefrostDefrost control
The controller contains a timer function that is zero set 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 rst 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 xed times of the day.
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 dierent 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, gas, brine or
"non".
During defrost the defrost relay will be cut in.
(With brine the ”refrigeration control valve” will be kept open during defrost)
Defrost stop temperature
The defrost is stopped at a given temperature which is measured with a sensor (the
sensor is dened in d10).
The temperature value is set.
c05Step delay
c30Cmp relay NC
c70Ext. Relay
Here you can read the status of the
compressor relay, or you can forcecontrol the relay in the ”Manual
control” mode
d01Def. method
0 = non
1 = El
2 = Gas
3= Brine
d02Def. Stop Temp
Interval between defrost starts
The function is zero set 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.
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 rst defrost taking place when voltage is connected
to the controller.
The function will be active after each and every power failure.
Drip-o 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 o the evaporator).
d05Time Stagg.
d06DripO 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).
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 a lower value than the one set here.
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 dene the defrost sensor.
0: None, defrost is based on time
1: S5
2: S4
Pump down delay
Set the time where the evaporator is emptied of refrigerant prior to the defrost.
Drain delay (only in connection with hot gas)
Set the time where the evaporator is emptied of condensed refrigerant after the
defrost.
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 eectivity 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
Delay of the hot gas injection
Can be used when vales of the type PMLX and GPLX are used. Time is set so that the
valve is closed completely before the hot gas is turned on.
If you wish to see the temperature at the defrost 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.Defrost Relay
d07FanStartDel
d08FanStartTemp
d09FanDuringDef
d10DefStopSens.
d16Pump dwn del.
d17Drain del
d18MaxTherRunT
d19CutoutS5Dif.
d23--
Defrost temp.
Def Start
Here you can start a manual defrost
Here you can read the defrost relay
status or you can force-control the
relay in “Manual control” mode.
Hold After Def
Shows ON when the controller is
operating with coordinated defrost.
Defrost State
Status on defrost
1= pump down / defrost
Here you can select whether the fan is to be stopped when the compressor is cut out
F01Fan 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.
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.
The LED on the controller’s front will indicate whether a defrost is going on.Fan Relay
HACCPHACCP
HACCP temperature
Here you can see the temperature measurement that transmits signal to the function
Last too high HACCP temperature was registered in connection with: (Value can be
read out).
H01: Temperature exceeding during normal regulation.
H02: Temperature exceeding during power failure. Battery backup controls the times.
H03: Temperature exceeding during power failure. No control of times.
Last time the HACCP temperature was exceeded: Yearh03Last time the HACCP temperature was exceeded: Monthh04Last time the HACCP temperature was exceeded: Dayh05Last time the HACCP temperature was exceeded: Hourh06Last time the HACCP temperature was exceeded: Minuteh07Last exceeding: Duration in hoursh08Last exceeding: Duration in minutesh09Peak temperature
The highest measured temperature will continuously be saved when the temperature
exceeds the limit value in h12. The value can be read out until the next time the temperature exceeds the limit value. After that it is overwritten with the new measurements.
Selection of function
0: No HACCP function
1: S3 and/or S4 used as sensor. Denition takes place in h14.
2: S5 used as sensor.
Alarm limit
Here you set the temperature value at which the HACCP function is to enter into
force. When the value becomes higher than the set one, the time delay starts.
Time delay for the alarm (only during normal regulation).
When the time delay has been passed the alarm is activated.
Selection of sensors for the measuring
If the S4 sensor and/or the S3 sensor is used, the ratio between them must be set.
At setting 100% only S4 is used. At setting 0% only S3 is used.
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.
MiscellaneousMiscellaneous
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 - DI1
The controller has a digital input 1 which can be used for one of the following functions:
O: 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 “A4” 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 “A4” is passed, there will be alarm.
4) Defrost. The function is started with a pulse signal. The controller will register when
the DI input is activated. The controller will then start a defrost cycle. If the signal
is to be received by several controllers it is important that ALL connections are
mounted the same way (DI to DI and GND to GND).
5) Main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when the input is put in 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 signal. Cf. also description on
page 4.
11) Forced refrigeration at hotgas defrost when the input is short-circuited.
Data communication
If the controller is built into a network with data communication, it must have an
address, and the system manager of the data communication must then know this
address.
The installation of the data communication cable has been mentioned in a separate
document “RC8AC”.
The address is set between 0 and 240.
The address is sent to the system manager when menu o04 is set to 'ON', or when the
system manager's scanning function is activated.
IMPORTANT: Before setting o04 or the scanning function is activated, you MUST set
o61. Otherwise you will send the incorrect data set (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) 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.
Select signal for the display S4%
Here you dene the signal to be shown by the display.
S3, S4, or a combination of the two.
With setting 0% only S3 is used. With 100% only S4.
o01DelayOfOutp.
o02DI 1 Cong.
Denition takes place with the numerical value shown to the left.
(0 = o)
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
o03
an equal footing with the
other controllers in ADAP-KOOL®
refrigeration controls.
The controller has a digital input 2 which can be used for one of the following functions:
O: 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 “A4” is passed, an alarm
will be given and refrigeration resumed.
3) Door alarm. When the input is open it signals that the door is open. When the time
setting in “A4” is passed an alarm will be given.
4) Defrost. The function is started with a pulse signal. The controller will register when
the DI input is activated. The controller will then start a defrost cycle. If the signal
is to be received by several controllers it is important that ALL connections are
mounted the same way (DI to DI and GND to GND).
5) Main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when the input is put in pos. OFF.
6) Night operation. When the input is short-circuited, there will be regulation for
night operation.
7) Reference displacement when DI2 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.
10) Case cleaning. The function is started with a pulse signal. Cf. also description on
page 4.
11) Forced refrigeration at hot gas defrost when the input is short-circuited.
12) The input is used for coordinated defrost in conjunction with other controllers of
the same type
Conguration of light function (relay 4 in applications 2 and 6)
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 dened in either o02 or o37 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 o.
Activation of light relay
The light relay can be activated here, but only if dened in o38 with setting 2.
Rail heat during day operation
The ON period is set as a percentage of the time
Rail heat during night operation
The ON period is set as a percentage of the time
Rail heat cycle
The period of time for the aggregate ON time + OFF time is set in minutes
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 O.
2 = Cleaning with stopped fans. All outputs are O.
If the function is controlled by a signal at the DI1 or DI2 input, the relevant status can
be seen here in the menu.
Selection of application
The controller can be dened in various ways. Here you set which of the 10 applications is required. On page 6 you can see a survey of applications.
This menu can only be set when regulation is stopped, i.e. “r12” is set to 0.
Transfer a set of presetting to the controller
It is possible to select a quick setting of a number of parameters. It depends on
whether an application or a room is to be controlled and whether defrost is to be
stopped based on time or based on temperature. The survey can be seen on page 22.
This menu can only be set when regulation is stopped, i.e. “r12” is set to 0.
o37DI2 cong.
o38Light cong
o39Light remote
o41Railh.ON day%
o42Railh.ON ngt%
o43Railh. cycle
o46Case clean
o61--- Appl. Mode (only output in Danfoss
only)
o62-
After the setting the value will return to 0. Any subsequent adjustment/setting of
parameters can be made, as required.
Access code 2 (Access to adjustments)
There is access to adjustments of values, but not to conguration 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.
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).
Temperature measured with S5 sensoru09S5 temp.
Status on DI1 input. on/1=closedu10DI1 status
Temperature measured with S3 sensor
Status on night operation (on or o) 1=closed
Temperature measured with S4 sensoru16S4 air temp
Thermostat temperatureu17Ther. air
Read the present regulation referenceu28Temp. ref.
Status on DI2 output. on/1=closedu37DI2 status
Temperature shown on display
Measured temperature for alarm thermostatu57Alarm air
** Status on relay for coolingu58Comp1/LLSV
** Status on relay for fanu59Fan relay
** Status on relay for defrostu60Def. relay
** Status on relay for rail heatu61Railh. relay
** Status on relay for alarm
** Status on relay for light
** Status on relay for valve in suction lineu64SuctionValve
** Status on relay for compressor 2u67Comp2 relay
*) Not all items will be shown. Only the function belonging to the selected applica-
In an error situation the LED’s on the front will ash 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 more keep on 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:1 = alarm
A1: High temperature alarmHigh t. alarm
A2: Low temperature alarmLow t. alarm
A4: Door alarmDoor Alarm
A5: Information. Parameter o16 is expiredMax Hold Time
A15: Alarm. Signal from DI1 input DI1 alarm
A16: Alarm. Signal from DI2 inputDI2 alarm
A45: Standby position (stopped refrigeration via r12 or DI input)Standby mode
A59: Case cleaning. Signal from DI1 or DI2 inputCase cleaning
A60: High-temperature alarm for the HACCP functionHACCP alarm
Max. def time
E1: Faults in the controllerEKC error
E6: Fault in real-time clock / reset the clock.-
E25: Sensor error on S3S3 error
E26: Sensor error on S4S4 error
E27: Sensor error on S5S5 error
Alarm destinations
The importance of the individual
alarms can be dened with a setting
(0, 1, 2 or 3)
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
EKC State:
(Shown in all menu displays)
visible, you can see an operating status on the display. Push briey (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:
S0: Regulating0
S1: Waiting for end of the coordinated defrost1
S2: When the compressor is operating it must run for at least x minutes.2
S3: When the compressor is stopped, it must remain stopped for at least x minutes.3
S4: The evaporator drips o and waits for the time to run out4
S10: Refrigeration stopped by main switch. Either with r12 or a DI-input10
S11: Refrigeration stopped by thermostat11
S14: Defrost sequence. Defrost in progress14
S15: Defrost sequence. Fan delay — water attaches to the evaporator15
S17: Door is open. DI input is open17
S20: Emergency cooling *)20
S25: Manual control of outputs25
S29: Case cleaning29
S30: Forced cooling30
S32: Delay on outputs during start-up32
S33: Heat function r36 is active33
Other displays:
non: The defrost temperature cannot be displayed. There is stop based on time
-d-: Defrost in progress / First cooling after defrost
PS: Password required. Set password
*) Emergency cooling will take eect when there is lack of signal from a dened S3 or S4 sensor. The regulation will continue with a registered average
cutin frequency. There are two registered values – one for day operation and one for night operation.
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 dierent from factory (0)
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
HACCP = HACCP function is active
The other LED’s on the front panel will light up when the belonging relay is activated.
= Refrigeration
= Defrost
= Fan running
The light-emitting diodes will ash 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 knob 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 again to conclude the setting.
Reading the temperature at defrost sensor
• Push short the lower button
Manuel start or stop of a defrost
• Push the lower button for four seconds.
See HACCP registration
1. Give the middle button a long push until h01 appears
2. Select required h01-h10
3. See value by giving the middle button a short push
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
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.
Examples
Set menu
1. Push the upper button until a parameter r01 is shown
2. Push the upper or the lower button and nd 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 freeze the value.
Get a good start
With the following procedure you can start regulation very quickly:
1 Open parameter r12 and stop the regulation (in a new and not
previously set unit, r12 will already be set to 0 which means
stopped regulation.)
2 Select electric connection based on the drawings on page 6 to 7
3 Open parameter o61 and set the electric connection number in
it
4 Now select one of the preset settings from the table on page 22.
5 Open parameter o62 and set the number for the array of preset-
tings. The few selected settings will now be transferred to the
menu.
6 Open parameter r12 and start the regulation
7 Go through the survey of factory settings. The values in the grey
cells are changed according to your choice of settings. Make any
necessary changes in the respective parameters.
8 For network. Set the address in o03 and start the scan function
in the system manager.
Cutout alarm relay / receipt alarm/see alarm code
• Push short 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.
This function will follow the appliance temperature and sound an
alarm if the set temperature limit is exceeded. The alarm will come
when the time delay has elapsed.
When the temperature exceeds the limit value it will continuously
be registered and the peak value will be saved until the later readout. Saved together with the value will be the time and duration
of the temperature exceeding.
Examples of temperature exceeding:
Exceeding during normal regulation
The readout of the various values in the HACCP function can take
place with a long push on the middle button.
The readouts are, as follows:
h01: The temperature
h02: Readout of the controller’s status when temperature was
exceeded:
H1 = normal regulation.
H2 = power failure. Times are saved.
H3 = power failure. Times not saved.
h03: Time. Year
h04: Time. Month
h05: Time: Day
h06: Time. Hour
h07: Time. Minute
h08: Duration in hours
h09: Duration in minutes
h10: The registered peak temperature
(Setup of the function takes place just like the other setups. See
menu survey on the next page).
Exceeding in connection with power failure where the controller
can keep on registering the time performance.
Exceeding in connection with power failure when the controller
has lost its clock function and hence also its time performance.
Dierential***r010.1 K20.0K2.0 K
Max. limitation of set point setting***r02-49.0°C50°C50.0°C
Min. limitation of set point setting***r03-50.0°C49.0°C-50.0°C
Adjustment of temperature indicationr04-20.0 K20.0 K0.0 K
Temperature unit (°C/°F)r05°C°F°C
Correction of the signal from S4r09-10.0 K+10.0 K0.0 K
Correction of the signal from S3r10-10.0 K+10.0 K0.0 K
Manual service, stop regulation, start regulation (-1, 0, 1)r12-110
Displacement of reference during night operationr13-10.0 K10.0 K0.0 K
Denition and weighting, if applicable, of thermostat sensors
- S4% (100%=S4, 0%=S3)
The heating function is started a number of degrees below the
thermostats cutout temperature
Activation of reference displacement r40r39OFFONOFF
Value of reference displacement (activate via r39 or DI)r40-50.0 K50.0 K0.0 K
Alarm
Delay for temperature alarmA030 min240 min 30 min
Delay for door alarm***A040 min240 min 60 min
Delay for temperature alarm after defrostA120 min240 min 90 min
High alarm limit***A13-50.0°C50.0°C8.0°C
Low alarm limit***A14-50.0°C50.0°C-30.0°C
Alarm delay DI1A270 min240 min 30 min
Alarm delay DI2A280 min240 min 30 min
Signal for alarm thermostat. S4% (100%=S4, 0%=S3)A360%100%100%
Compressor
Min. ON-timec010 min30 min0 min
Min. OFF-timec020 min30 min0 min
Time delay for cutin of comp.2c050 sec999 sec0 sec
Compressor relay 1 must cutin and out inversely
(NC-function)
External relays (zero-crossing control)
Must be 'ON' when connecting to external relays
Defrost
Defrost method (none/EL/GAS/BRINE)d01nobriEL
Defrost stop temperatured020.0°C25.0°C6.0°C
Interval between defrost startsd030 hours 48 hours 8 hours
Max. defrost durationd040 min180 min 45 min
Displacement of time on cutin of defrost at start-upd050 min240 min0 min
Drip o timed060 min60 min0 min
Delay for fan start after defrostd070 min60 min0 min
Fan start temperatured08-15.0°C0.0°C-5.0°C
Fan cutin during defrost
ParametersEL-diagram number (page 6 to 9)
r150%100%100%
r36-15.0 K-3.0 K-15.0 K
c300
c70OFFONON
d09021
Min.value
OFF
Max.value
1
ON
SW = 1.1x
Factory
setting
0
OFF
0: Stopped
1: Running
2: Running during pump down and defrost
Defrost sensor (0=time, 1=S5, 2=S4)d10020
Pump down delayd160 min60 min0 min
Drain delayd170 min60 min0 min
Max. aggregate refrigeration time between two defrostsd180 hours 48 hours 0 hours
Defrost on demand - S5 temperature’s permitted variation during frost build-up. On central plant choose 20 K (=o)
Delay of hot gas defrostd230 min60 min0 min
Fan
Fan stop at cutout compressorF01noyesno
Delay of fan stopF020 min30 min0 min
Fan stop temperature (S5)F04-50.0°C50.0°C50.0°C
HACCP
Actual temperature measurement for the HACCP functionh01
Last registered peak temperatureh10
Selection of function and sensor for the HACCP function. 0 = no
HACCP function. 1 = S4 used (maybe also S3). 2 = S5 used
Alarm limit for the HACCP functionh12-50.0°C50.0°C8.0°C
Time delay for the HACCP alarmh130 min. 240 min. 30 min.
Select signal for the HACCP function. S4% (100% = S4, 0% = S3)h140%100%100%
Real time clock
Six start times for defrost.
Setting of hours.
0=OFF
Six start times for defrost.
Setting of minutes.
0=OFF
Clock - Setting of hours***t070 hours 23 hours 0 hours
Clock - Setting of minute***t080 min59 min0 min
Clock - Setting of date***t451311
Clock - Setting of month***t461121
Clock - Setting of year***t470990
Delay of output signals after start-upo010 s600 s5 s
Input signal on DI1. Function:
0=not used. 1=status on DI1. 2=door function with alarm when
open. 3=door alarm when open. 4=defrost start (pulse-signal).
5=ext.main switch. 6=night operation 7=change reference
(activate r40). 8=alarm function when closed. 9=alarm function
when open. 10=case cleaning (pulse signal). 11=forced cooling
at hot gas defrost.
Network address (0 =o)o0302400
On/O switch (Service Pin message)
IMPORTANT! o61 must be set prior to o04
Access code 1 (all settings)o0501000
Used sensor type (Pt /PTC/NTC)o06PtntcPt
Display step = 0.5 (normal 0.1 at Pt sensor)o15noyesno
Max hold time after coordinated defrosto160 min60 min20
Select signal for display view. S4% (100%=S4, 0%=S3)o170%100%100%
Input signal on DI2. Function:
(0=not used. 1=status on DI2. 2=door function with alarm when
open. 3=door alarm when open. 4=defrost start (pulse-signal).
5=ext. main switch 6=night operation 7=change reference
(activate r40). 8=alarm function when closed. 9=alarm function
when open. 10=case cleaning (pulse signal). 11=forced cooling
at hot gas defrost.). 12=coordinated defrost)
Conguration of light function (relay 4)
1=ON during day operation. 2=ON / OFF via data communication. 3=ON follows the DI-function, when DI is selected to door
function or to door alarm
Activation of light relay (only if o38=2)o39OFFONOFF
Rail heat On time during day operationso410%100%100
Rail heat On time during night operationso420%100%100
Rail heat period time (On time + O time)o436 min60 min10 min
Case cleaning. 0=no case cleaning. 1=Fans only. 2=All output
O.
Selection of EL diagram. See overview page 6-7*o611101
Download a set of predetermined settings. See overview next
page.
Access code 2 (partly access)***o6401000
Replace the controllers factory settings with the present settings
Service
Status codes are shown on page 17S0-S33
Temperature measured with S5 sensor***u09
Status on DI1 input. on/1=closedu10
Temperature measured with S3 sensor***u12
Status on night operation (on or o) 1=closed***u13
Temperature measured with S4 sensor***u16
Thermostat temperatureu17
Read the present regulation referenceu28
Status on DI2 output. on/1=closedu37
Temperature shown on displayu56
Measured temperature for alarm thermostatu57
Status on relay for cooling**u58
Status on relay for fan**u59
Status on relay for defrost**u60
Status on relay for railheat**u61
Status on relay for alarm**u62
Status on relay for light**u63
Status on relay for valve in suction line**u64
Status on relay for compressor 2**u67
*) Can only be set when regulation is stopped (r12=0)
**) Can be controlled manually, but only when r12=-1
***) With access code 2 the access to these menus will be limited
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 recon nect the supply voltage
S3 and S4 are thermostat sensors.
A setting determines whether S3 or S4 or both of them are to be
used.
S5 is a defrost sensor and is used if defrost has to be stopped
based on temperature.
Digital On/O signals
A cut-in input will activate a function. The possible functions are
described in menus o02 and o37.
External display
You can connect an external display. The display is connected
MODBUS input. See next page.
Relays
The general uses are mentioned here. See also page 6 to 7 where
the dierent applications are shown.
DO1: Refrigeration. The relay will cut in when the controller demands refrigeration
DO2: Defrost. The relay will cut in when defrost is in progress
DO3: For either fans or refrigeration 2
Fans: The relay will cut in when the fans have to operate
Refrigeration 2: The relay will cut in when refrigeration step 2
has to be cut in
DO4: For either alarm, rail heat, light or hot gas defrost
Alarm: Cf. diagram. The relay is cut in during normal operation and cuts out in alarm situations and when the controller
is dead (de-energised)
Rail heat: The relay cuts in when rail heat is to operate
Light: The relay cuts in when the light has to be switched on
Hot gas defrost: See diagram. The relay will cut out when
defrost has to be done
Data communication
Fixed MOD-bus.
If data communication is used, it is important that the installation
of the data communication cable is performed correctly.
See separate literature No. RC8AC…
AK-CC 350 can also use LON RS 485, but this requires a data communication module type EKA 175. The connections must be made
to terminals 18 to 21.
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
Supply voltage230 V a.c. +10/-15 %. 2.5 VA, 50/60 Hz
Sensors 3 pcs o
either
Accuracy
DisplayLED, 3-digits
External display EKA 163A / EKA 164A
Digital inputs
Electrical connection cable
Relays*
Data communication
Environments
EnclosureIP 20
Escapement
reserve for the
clock
Approvals
* DO1 is 20 A relay. DO2 and DO3 are 16 A relays. DO4 is a 10 A relay. 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.
Pt 1000 or
PTC (1000 ohm) 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
Pt 1000
sensor
±0.3 K at 0°C
±0.005 K per grad
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
IEC60730
10 (6) A & (5 FLA, 30 LRA)1)
DO1
DO2
16 (8) A & (10 FLA, 60 LRA) 2)
6 (3) A & (3 FLA, 18 LRA)1)
10 (6) A & (5 FLA, 30 LRA)2)
DO3
6 (3) A & (3 FLA, 18 LRA)1)
10 (6) A & (5 FLA, 30 LRA)2)
DO4**4 (1)A Min. 100 mA**
MODBUS
AK-CC 350 can be expanded with LON or MODBUS
0 to +55°C, During operations
-40 to +70°C, During transport
20 - 80% Rh, not condensed
No shock inuence / vibrations
4 hours
EU Low Voltage Directive and EMC demands re CEmarking complied with
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
Capacitive load
The relays cannot be used for the direct connection of capacitive loads
such as LEDs and on/o control of EC motors.
All loads with a switch mode power supply must be connected with a
suitable contactor or similar.
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 specications 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.