AK-CC 750A controllers are complete regulating units which
together with valves and sensors constitute complete evaporator
controls for refrigeration appliances and freezing rooms within
commercial refrigeration.
Generally speaking they replace all other automatic controls
containing, inter alia, day and night thermostats, defrost, fan control, rail heat control, alarm functions, light control, thermo valve
control, solenoid valve, etc.
The controller is equipped with data communication and is operated via a PC.
In addition to evaporator control the controller can give signals to
other controllers about the operating condition, e.g. forced closing of expansion valves, alarm signals and alarm messages.
Advantages
• Control of 1 to 4 evaporator sections
• Adaptive superheat control ensures optimum evaporator usage
in all operational circumstances.
• Electronic injection with AKV valve or stepper valve
• Traditional temperature regulation using on/off or modulating
control of solenoid valve for both DX and indirect brine system.
• Weighted thermostat and alarm thermostat
• Defrost on demand based on evaporator capacity
• Appliance cleaning function
• Light control using door switch or network signal depending on
day/night operation
• Rail heat pulsing depending on day/night operation or dew
point
• Monitoring of door alarm and control of light/refrigeration
depending on location of door switch.
• Log function for registration of historical parameter values and
alarm modes.
Control
The controller’s main function is to control the evaporator so that
the system constantly operates with the most energy-friendly
refrigeration.
A specific function for registration of the need for defrost will
adapt the number of defrosts so that no energy is wasted on unnecessary defrosts and subsequent cooling-down cycles.
Adaptive defrosting
The AK-CC 750A includes an adaptive defrosting function. By
using the injection valves opening degree as mass flow sensor for
the supply of refrigerant, the controller can monitor ice formation
on the evaporator. If the load is too large for the standard defrost
programme, the controller initiates additional automatic defrost
cycles to eliminate the need for expensive service calls due to
iced-up evaporators.
SW = 1.2x
Evaporator control of one, two, three or four evaporators
The great advantage of this series of controllers is that it can
be extended as the size of the plant is increased. It has been
developed for refrigeration control systems, but not for any
specific application – variation is created through the read-in
software and the way you choose to define the connections.
It is the same modules that are used for each regulation and the
composition can be changed, as required. With these modules
(building blocks) it is possible to create a multitude of various
kinds of regulations. But it is you who must help adjusting the
regulation to the actual needs – these instructions will assist
you to find your way through all the open questions so that the
regulation can be defined and the connections made.
Controller
Top part
Advantages
• The controller’s size can “grow” as systems grow
• The software can be set for one or more regulations
• Several regulations with the same components
• Extension-friendly when systems requirements are changed
• Flexible concept:
- Controller series with common construction
- One principle – many regulation uses
- Modules are selected for the actual connection requirements
- The same modules are used from regulation to regulation
Extension modules
Bottom part
The controller is the cornerstone of the regulation. The module has inputs and
outputs capable of handling small systems.
• The bottom part – and hence the terminals – are the same for all controller types.
• The top part is the intelligence with software. This unit will vary according to controller type. But it will always be supplied together with the bottom part.
• In addition to the software the top part is provided with connection for data communication and address setting.
Examples
A regulation with few connections can
be performed with the controller module
alone
If the system grows and more functions have to be controlled, the regulation can be
extended.
With extra modules more signals can be received and more relays cut in and out –
how many of them – and which – is determined by the relevant application.
If there are many connections one or more extension modules have to be mounted
Setup and operation of an AK controller must be accomplished via
the “AK-Service Tool” software program.
The programme is installed on a PC, and setup and operation of
the various functions are carried out via the controller’s menu
displays.
Displays
The menu displays are dynamic, so that different settings in one
menu will result in different setting possibilities in other menus.
A simple application with few connections will give a setup with
few settings.
A corresponding application with many connections will give a
setup with many settings.
From the overview display there is access to further displays for
the regulation.
At the bottom of the display there is access to a number of general
functions, such as “time table”, “manual operation”, “log function”,
“alarms”, and “service” (configuration).
Network linking
The controller can be linked up into a LON-network together with
other controllers in an ADAP-KOOL® refrigeration control system.
After the setup operation can be performed at a distance with,
say, our software program type AKM.
Users
The controller comes supplied with several languages, one of
which can be selected and employed by the user. If there are several users, they may each have their choice of language. All users
must be assigned a user profile which either gives access to full
operation or gradually limits the operation to the lowest level that
only allows you “to see”.
External display
An external display can be fitted in order to show the air temperatures around the evaporators.
In AK-CC 750A up to 4 displays can be mounted.
A graphical display with control buttons can also be fitted.
A number of light-emitting diodes makes it possible to follow the
signals that are received and transmitted by the controller.
Log
From the log function you can define the measurements
you wish to be shown.
The collected values can be printed, or you may export them to a
file. You can open the file in Excel or import in AKM.
(The Log function is only available via AK-ST 500.)
If you are in a service situation you can show measurements in a
trend function. The measurements are then made real-time and
displayed instantly.
■ Power
■ Comm
■ DO1 ■ Status
■ DO2 ■ Service Tool
■ DO3 ■ LON
■ DO4 ■ I/O Extension
■ DO5 ■ Alarm
■ DO6
■ DO7 ■ Display
■ DO8 ■ Service Pin
Slow flash = OK
Quick flash = answer from gateway/
installed in network
Constantly ON = error
Constantly OFF = error
Flash = active alarm/not acknowledged
Constant ON = Active alarm/acknowledged
Alarm
The display gives you an overview of all active alarms. If you wish
to confirm that you have seen the alarm you can cross it off in the
acknowledge field.
If you want to know more about a current alarm you can click on it
and obtain an information display on the screen.
A corresponding display exists for all earlier alarms. Here you can
upload information if you need further details about the alarm
history.
Adaptive defrost
AK-CC 750A is equipped with an adaptive defrost function. By
using an AKV valve (ETS/CCMT Valve) as mass flow sensor for the
supply of refrigerant the control can monitor ice formation on the
evaporator.
Function can cancel planned defrosts which are not necessary,
and on its own initiative start a defrost if the evaporator is about
to be blocked by rime and ice.
This section describes how the controller is designed.
The controller in the system is based on a uniform connection
platform where any deviations from regulation to regulation is
determined by the used top part with a specific software and
by which input and output signals the relevant application will
require. If it is an application with few connections, the controller
module (top part with belonging bottom part) may be sufficient.
If it is an application with many connections it will be necessary to
use the controller module plus one or more extension modules.
This section will give you a survey of possible connections plus
assistance in selecting the modules required by your actual application.
• Controller module – capable of handling minor plant requirements.
• Extension modules. When the numbers of evaporators becomes
greater and additional inputs or outputs are required, modules
can be attached to the controller. A plug on the side of the module will transmit the supply voltage and data communication
between the modules.
• Top part
The upper part of the controller module contains the intelligence. This is the unit where the regulation is defined and where
data communication is connected to other controllers in a bigger network.
• Connection types
There are various types of inputs and outputs. One type may, for
example, receive signals from sensors and switches, another may
receive a voltage signal, and a third type may be outputs with
relays etc. The individual types are shown in the table below.
Extension module with additional analog inputs
• Optional connection
When a regulation is planned (set up) it will generate a need for
a number of connections distributed on the mentioned types.
This connection must then be made on either the controller
module or an extension module. The only thing to be observed
is that the types must not be mixed (an analog input signal must
for instance not be connected to a digital input).
• Programming of connections
The controller must know where you connect the individual
input and output signals. This takes place in a later configuration
where each individual connection is defined based on the
following principle:
- to which module
- at which point (”terminals”)
- what is connected (e.g. pressure transmitter/type/
pressure range)
Extension module with additional
relay outputs and additional analog inputs.
External display
for appliance
temperature etc.
Bottom part
Controller with analog inputs and
relay outputs.
Top part
The module with additional relay outputs is
also available in a version where the top part
is provided with change-over switches so
that the relays can be overridden.
The module dimension is 72 mm.
Modules in the 100-series consist of one
module
Modules in the 200-series consist of two
modules
Controllers consist of three modules
There are several controllers in the series. The function is determined by the programmed software, but outwardly the controllers are identical – they all have the same connection possibilities:
11 analog inputs for sensors, pressure transmitters, voltage signals
and contact signals.
8 digital outputs, with 4 Solid state outputs and 4 relay outputs
Supply voltage
24 V a.c. or d.c. to be connected to the controller.
The 24 V must not be retransmitted and used by other controllers as it is not galvanically separated from inputs and outputs. In
other words, you must use a transformer for each controller. Class
II is required. The terminals must not be earthed.
The supply voltage to any extension modules is transmitted via
the plug on the right-hand side.
The size of the transformer is determined by the power requirement of the total number of modules.
The supply voltage to a pressure transmitter can be taken either
from the 5 V output or from the 12 V output depending on transmitter type.
PIN
Data communication
If the controller is to be included in a system, communication must take place via the LON connection.
The installation has to be made as mentioned in the separate instructions for LON communication.
Address setting
When the controller is connected to a gateway type AKA 245,
the controller’s address must be set between 1 and 119. (1-200 at
AK-SM..).
Service PIN
When the controller is connected to the data communication cable the gateway must have knowledge of the new controller. This
is obtained by pushing the key PIN. The LED “Status” will flash fast
when the gateway sends an acceptance message.
Operation
The configuration operation of the controller must take place from
the software programme “Service Tool”. The program must be
installed on a PC, and the PC must be connected to the controller
via the network plug on the front of the unit.
Light-emitting diodes
There are two rows with LED’s. They mean:
Left row:
• Voltage supply to the controller
• Communication active with the bottom PC board (red = error)
• Status of outputs DO1 to DO8
Right row:
• Software status (slow flash = OK)
• Communication with Service Tool
• Communication on LON
• Communication with AK-CM 102
• Alarm when LED flashes
- 1 LED that is not used
• Communication with display on RJ11 plug
• “Service Pin” switch has been activated
Address
■ Power
■ Comm
■ DO1 ■ Status
■ DO2 ■ Service Tool
■ DO3 ■ LON
■ DO4 ■ I/O Extension
■ DO5 ■ Alarm
■ DO6
■ DO7 ■ Display
■ DO8 ■ Service Pin
Keep the safety
distance!
Low and high
voltage must not
be connected to
the same output
group
Slow flash = OK
Quick flash = answer from gateway
Installation in network
Constantly ON = error
Constantly OFF = error
Flash = active alarm/not cancelled
Constant ON = Active alarm/cancelled
The supply voltage to the module comes from the previous module in the row.
AK-XM 204B only
Override of relay
Eight change-over switches at the front make it possible to override the relay’s function.
Either to position OFF or ON.
In position Auto the controller carries out the control.
Light-emitting diodes
There are two rows with LED’s. They indicate the following:
Left row:
• Voltage supply to the controller
• Communication active with the bottom PC board (red = error)
• Status of outputs DO1 to DO8
Right row: (AK-XM 204B only):
• Override of relays
ON = override
OFF = no override
AK-XM 204A AK-XM 204B
Fuses
Behind the upper part there is a fuse for each output.
Max. 230 V
AC-1: max. 4 A (ohmic)
AC-15: max. 3 A (Inductive)
AK-XM 204B
Override of relay
Keep the safety distance!
Low and high voltage
must not be connected to
the same output group
The module contains:
8 analog inputs for sensors, pressure transmitters, voltage signals
and contact signals.
8 relay outputs.
Supply voltage
The supply voltage to the module comes from the previous module in the row.
AK-XM 205B only
Override of relay
Eight change-over switches at the front make it possible to override the relay’s function.
Either to position OFF or ON.
In position Auto the controller carries out the control.
Light-emitting diodes
There are two rows with LED’s. They mean:
Left row:
• Voltage supply to the controller
• Communication active with the bottom PC board (red = error)
• Status of outputs DO1 to DO8
Right row: (AK-XM 205B only):
• Override of relays
ON = override
OFF = no override
AK-XM 205A AK-XM 205B
max. 10 V
Fuses
Behind the upper part there is a fuse for each output.
Max. 230 V
AC-1: max. 4 A (ohmic)
AC-15: max. 3 A (Inductive)
AK-XM 205B
Override of relay
Keep the safety distance!
Low and high voltage
must not be connected to
the same output group
The module contains:
8 analog inputs for sensors, pressure transmitters, voltage signals
and contact signals.
4 outputs for stepper motors.
Supply voltage
The supply voltage to the module comes from the previous module in the row. Here supplied with 5 VA.
The supply voltage to the valves must be from a separate supply,
which must be galvanically separated from the supply for the
control range.
(Power requirements: 7.8 VA for controller + xx VA per valve).
Separate voltage
supply is required
A UPS may be necessary if the valves need to open/close during a
power failure.
Light-emitting diodes
There is one row with LED’s. It indicate the following:
• Voltage supply to the module
• Communication active with the bottom PC board (red = error)
• Step1 to step4 OPEN: Green = Open
• Step1 to step4 CLOSE: Green = Close
• Red flash = Error on motor or connection
24 V d.c. Fx. 13 VA
max. 10 V
L = max. 30 m
Output:
24 V d.c.
20-500 step/s
Max phase current = 325 mA RMS
∑ P
= max. 21 VA
out
The connection to the valve must not
be broken using a relay
Display of important measurements from the controller, e.g.
appliance temperature.
Setting of the individual functions can be performed by using the
display with control buttons.
It is the controller used that determines the measurements and
settings that can occur.
Connection
The extension module is connected to the controller module via
a cable with plug connections. You have to use one cable per
module. The cable is supplied in various lengths.
Both types of display (with or without control buttons) can be
connected to either display output A, B, C and D.
When the controller starts up, the display will show the output
that is connected.
- - 1 = output A
- - 2 = output B
etc.
EKA 163B EKA 164B
Placing
The extension module can be placed at a distance of up to 15 m
from the controller module.
Point
No point has to be defined for a display module – you simply
connect it.
Graphic display MMIGRS2
Function
Setting and display of values in the controller.
Connection
The display connects to the controller via a cable with RJ11 plug
connections.
Supply voltage
Received from the controller via cable and RJ11 connector.
Termination
The display must be terminated. Mount a connection between the
terminals H and R.
(AK-CC 750A is terminated internally.)
Placing
The display can be placed at a distance of up to 3 m from the
controller.
Point / Address
No point has to be defined for a display – you simply connect it.
However, the address must be verified. See the instructions accompanying the controller.
The module is a new communication module, meaning the row of
extension modules can be interrupted.
The module communicates with the regulator via data communication and forwards information between the controller and the
connected extension modules.
Connection
Communication module and controller fitted with RJ 45 plug connectors.
Nothing else should be connected to this data communication; a
maximum of 5 communication modules can be connected to one
controller.
Communication cable
One metre of the following is enclosed:
ANSI/TIA 568 B/C CAT5 UTP cable w/ RJ45 connectors.
Positioning
Max. 30 m from the controller
(The total length of the communication cables is 30 m)
Max. 32 VA
Supply voltage
24 volt AC or DC should be connected to the communication
module.
The 24 V can be sourced from the same supply that supplies the
controller. (The supply for the communication module is galvanically separated from the connected extension modules).
The terminals must not be earthed.
The power consumption is determined by the power consumption of the total number of modules.
The controller strand load must not exceed 32 VA.
Each AK-CM 102 strand load must not exceed 20 VA.
Point
Connection points on the I/O modules should be defined as if the
modules were an extension of each other.
Address
The address for the first communication module should be set to
1. Any second module should be set to 2. A maximum of 5 modules can be addressed.
Termination
The termination switch on the final communication module
should be set to ON.
The controller should permanently be set to = ON.
Warning
Additional modules may only be installed following the installation of the final module. (Here following module no. 11; see the
sketch.)
After configuration, the address must not be changed.
Be aware of the following when the number of extension modules
is being planned. A signal may have to be changed, so that an additional module may be avoided.
• An ON/OFF signal can be received in two ways. Either as a
contact signal on an analog input or as voltage on a low or highvoltage module.
• An ON/OFF output signal can be given in two ways. Either with
a relay switch or with solid state. The primary difference is the
permitted load and that the relay switch contains a cutout
switch.
Mentioned below is a number of functions and connections that
may have to be considered when a regulation has to be planned.
There are more functions in the controller than the ones mentioned here, but those mentioned have been included in order
that the need for connections can be established.
Functions
Clock function
Clock function and change-over between summer time and winter time are contained in the controller.
The clock setting is maintained for at least 12 hours at a power
failure.
The clock setting is kept updated if the controller is linked up in a
network with a system manager.
Start/stop of regulation
Regulation can be started and stopped via the software. External
start/stop can also be connected.
Alarm function
If the alarm is to be sent to a signal transmitter, a relay output will
have to be used.
Extra temperature sensors and pressure sensors
If additional measurements have to be carried out beyond the
regulation, sensors can be connected to the analog inputs.
Forced control
The software contains a forced control option. If an extension
module with relay outputs is used, the module’s top part can be
with change-over switches – switches that can override the individual relays into either OFF or ON position.
Data communication
The controller module has terminals for LON data communication.
The requirements to the installation are described in a separate
document. Literature number RC8AC.
In principle there are the following types of connections:
Analog inputs ”AI”
This signal must be connected to two
terminals.
Signals can be received from the following
sources:
• Temperature signal from Pt 1000 ohm
temperature sensor
• Pulse signal or reset signal
• Contact signal where the input is shortcircuited or ”opened”, respectively
• Voltage signal from 0 to 10 V
• Signal from pressure transmitter AKS 32,
AKS 32R, AKS 2050 or MBS 8250.
The supply voltage is supplied from the
module’s terminal board where there is
both a 5 V supply and a 12 V supply.
When programming the pressure transmitter’s pressure range must be set.
ON/OFF voltage inputs ”DI”
This signal must be connected to two
terminals.
• The signal must have two levels, either 0 V
or ”voltage” on the input.
There are two different extension
modules for this signal type:
- low-voltage signals, e.g. 24 V
- high-voltage signals, e.g. 230 V
When programming the function must be set:
• Active when the input is without voltage
• Active when voltage is applied to the
input.
ON/OFF output signals ”DO”
There are two types, as follows:
• Relay outputs
All relay outputs are with change-over
relay so that the required function can be
obtained when the controller is without
voltage.
• Solid state outputs
Primarily for AKV valves which connect
quickly. But output can cut an external
relay in and out, as with a relay output.
The output is only found on the
controller module.
When programming the function must be set:
• Active when the output is activated
• Active when the output is not activated.
Analog output signal ”AO”
This signal is to be used if a control signal is
to be transmitted to an external valve or to
fans with EC motors.
When programming the signal range must
be defined: 0-5 V, 1-5 V, 0-10 V or 2-10 V.
Pulse signal for the stepper motors.
This signal is used by valve motors of the
type ETS, KVS, CCMT and CTR.
The valve type should be set during programming.
Limitations
As the system is very flexible regarding the number of connected
units you must check whether your selection complies with the
few limitations there are.
The complexity of the controller is determined by the software,
the size of the processor, and the size of the memory. It provides
the controller with a certain number of connections from which
data can be downloaded, and others where coupling with relays
can be performed.
The controller is not made for use on plate heat exchanger.
✔ The number of extension modules must be limited so that the
total power will not exceed 32 VA (including controller).
✔ No more than 5 pressure transmitters may be connected to one
controller module.
✔ No more than 5 pressure transmitters may be connected to one
extension module.
Common pressure transmitter
If several controllers receive a signal from the same pressure transmitter, the supply to the affected controllers must be wired so that
it is not possible to switch off one of the controllers without also
switching off the others. (If one controller is switched off, the signal will be pulled down, and all the other controllers will receive a
signal which is too low)
Design of a evaporator control
Procedure:
1. Make a sketch of the system in question
2. Check that the controller’s functions cover the required
application
3. Consider the connections to be made
4. Use the planning table. / Note down the number of connections
./ add up
5. Are there enough connections on the controller module? – If
not, can they be obtained by changing an ON/OFF input signal
from voltage signal to contact signal, or will an extension
module be required?
6. Decide which extension modules are to be used
7. Check that the limitations are observed
8. Calculate the total length of modules
9. The modules are linked together
10. The connection sites are established
11. Draw a connection diagram or a key diagram
12. Size of supply voltage/transformer
Follow these 12
steps
1
Sketch
Make a sketch of the system in question.
2
Evaporator and refrigerator appliance
functions
Application
Control of cold room or freezing roomx
Control of refrigeration or freezing appliancesx
Regulation of evaporators1 - 4
Thermostat function
Common thermostat function for all sectionsx
Thermostat function for each sectionx
On/off thermostat with AKV / ETS or solenoid valvex
Modulating thermostat with AKV / ETS valvex
Change between two thermostat references (thermostat band)x
Day/night switchx
Displacement of reference via analog input signalx
Thermostat sensor before or after evaporatorx
Thermostat sensor both before and after the evaporator (weighted
thermostat)
Alarm thermostat (weighted)x
Common functions
Fan control (pulsation or EC motor)x
Rail heat control (pulsation)x
Compressor control. Relay active when refrigeration is demandedx
The built-in week diagram can be used for raising the thermostat
reference, but it is also possible to use an external ON/OFF signal
or a signal via the network.
Product sensors
Each appliance section has a separate product sensor which can
be used for monitoring/registering the temperature.
Appliance cleaning function
A switch function with pulse pressure will activate the function
whereupon refrigeration will be stopped. The fans continue
operating.
”Later”: Next push on the switch will stop the fans.
”Still later”: Next push on the switch will restart refrigeration.
When a display is mounted at the appliance the various situations
may be followed by the readout:
Normal operation: Appliance temperature
1st push: Fan
2nd push: OFF
3rd push: Appliance temperature
Miscellaneous
Dedicated alarm for refrigerant leakx
Alarm prioritiesx
Sensor correctionx
Option for connection of separate display4
Separate thermostats5
Separate pressostats5
System signals via data communication
Signal for P0-optimasationx
Night setbackx
Inject ON-signal (forced closing)x
Light controlx
Coordinated defrostx
Forced coolingx
A bit more about the functions
Common thermostat
The thermostat temperature can be either a weighting of the S3
and S4 sensors in section A.
Alternatively, the thermostat temperature can be a minimum
value, a maximum value or an average value of all S3 or S4 sensors
for the refrigeration sections used.
Modulating thermostat
AKV / stepper:
The function can only be used on central plant.
The opening degree of the valve is adjusted so that an accurate,
constant temperature is maintained. .
Solenoid valve:
This function can be used on both central systems and on indirect
refrigeration appliances. The valve's duty cycle is adapted so that
optimum temperature regulation is achieved on the basis of a
specific time period. The valve's duty cycle is desynchronised so
that an even load is achieved across the entire system
Appliance shut down
Signal about shutdown can be received via data communication
or from a contact on a On/Off input.
Door switch function
In freezing and cold rooms the door switch is used for switching
the light on and off, for starting and stopping the refrigeration,
and for sounding the alarm if the door has been open for a long
time
Light function
The light function can be activated by the door switch, the internal time diagram or a signal via the network.
Defrost sensor S5
On long evaporators it may be necessary to mount two sensors in
order to ensure the correct defrost of the evaporator. The sensors
are for example named S5A-1 and S5A-2.
“Inject ON” override function
The function closes expansion valves on the evaporator control
when all compressors are stopped.
The function can take place via the data communication, or it may
be wired via a relay output.
Adaptive defrost
The function requires signals from S3 and S4 as well as from
condensing pressure Pc. The expansion valve must furthermore
be type AKV.
The function cannot be used in combination with pulsation of
fans.
If you want to know more about the functions, go to
chapter 5.
Changeover between two thermostat references
The function is used for appliances where contents are frequently
changed and where a different thermostat reference is required.
Changeover between the two references can take place by means
of a switch function.
Here is a survey of the possible connections. The texts can be read
in context with the planning table in point 4.
Analog inputs
Temperature sensors each section
• S3 air sensor at evaporator inlet
• S4 air sensor at evaporator outlet (one of the S3/S4 sensors may
be omitted)
.• S5 defrost sensor. Two may be used for long sections
• Product sensor. Extra sensor that only checks the product tem-
perature
• S2 gas sensor at evaporator outlet (control of AKV valve).
• Saux 1-4, extra sensors, which can be used for general
thermostats or monitoring.
Pressure transmitters
• P0 For registration of the evaporating pressure (control of AKV
valve).
• Pc For registration of the condensing pressure. Can be used in
connection with adaptive defrost, or the signal can be received
via data communication.
• Paux 1-3, extra transmitters, which can be used for general
pressostats or monitoring.
A pressure transmitter type AKS 32R can supply signals to five
controllers
Voltage signal
Ext. Ref. is used if the thermostat reference is to be displaced
with a signal from another control.
• General 0-10 V inputs. Up to 5 inputs, which can be used for
monitoring and alarm function.
• External start/stop of regulation
• Pulse pressure (on a analogue input) used for the ”appliance
cleaning” function
• Switch for changeover between two temperature referenc
• Inject ON. Signal from a compressor control
• Pulse pressure (on a analogue input) for start of defrost
• Pulse pressure (on a analogue input) for opening/closing Night
blind
• Door switch in coldroom
• External day/night signal (raises the temperature reference when
Night blind is used)
• Up to 10 general DI inputs for signals from other automatic controls serving to activate the controller’s alarm function
On/off-output
Relay outputs
• Defrost (one each section)
• Rail heat
• Fan motor
• Light
• Compressor (demand on cooling)
• Alarm relay
• Solenoid valve (EVR)
• Drain valve, Suction line valve
• Night blind
• Drip tray heat recovery
• General functions
AKV Solid state outputs
The solid state outputs on the controller module are primarily
used for AKV valves, but may also be used for the functions mentioned under ”relay outputs”.
(The output will always be “OFF” when the controller is hit by
power failure).
On/Off-inputs
Contact function (on an analog input) or voltage signal (on an
extension module)
Example
• Freezing appliance with three sections
• AKV is used for injections (S2 and P0)
• Electric defrost with stop based on temperature (S5)
• Two thermostat sensors per section (S3 and S4)
• Control of fans and rail heat
• External start/stop (Main switch)
• Switch signal for appliance cleaning
• 3 display for monitoring of appliance temperature
Analog output
• 0-10 V signal for valve regulation or fan with EC motor
• Stepper signal to ETS/CCMT valve
Data from this example is used in the planning table on the
next page.
The result is that the following modules should be used:
• AK-CC 750A controller
• AK-XM 101A
• 3 pcs. EKA 163B
If the result had demonstrated that an additional output was
needed, AK-XM 205A or B would have been the required extension.
The table helps you establish whether there are enough inputs
and outputs on the basic controller.
If there are not enough of them, the controllers must be
extended by one or more of the mentioned extension
modules.
Note down the connections you will require and add them
up
If you use many extension modules the controller’s length will
grow accordingly. The row of modules is a complete unit which
cannot be broken.
If the row becomes longer than desired, the row can be broken by
using AK-CM 102.
The module dimension is 72 mm.
Modules in the 100-series consist of one module
Modules in the 200-series consist of two modules
The controller consist of three modules
The length of an aggregate unit = n x 72 + 8
or in an other way:
Module Type Number at Length
Controller module 1 x 224 = 224 mm
Extension module 200-series _ x 144 = ___ mm
Extension module 100-series _ x 72 = ___ mm
Total length = ___ mm
9
Linking of modules
Start with the controller module and then mount the selected
extension modules. The sequence is of no importance.
However, you must not change the sequence, i.e. rearrange the
modules, after you have made the setup where the controller
is told which connections are found on which modules and on
which terminals.
The modules are attached to one another and kept together by a
connection which at the same time transmits the supply voltage
and the internal data communication to the next module.
Example continued:
Controller module + 1 extension module in 100-series =
224 + 72 = 296 mm.
Example
Mounting and removal must always be performed when there is
no voltage.
The protective cap mounted on the controller’s plug connection
must be moved to the last vacant plug connection so that the
plug will be protected against short-circuit and dirt.
When the regulation has started the controller will all the time
check whether there is connection to the connected modules. This
status can be followed by the light-emitting diode.
When the two catches for the DIN rail mounting are in open position the module can be pushed into place on the DIN rail – no
matter where in the row the module is found.
Removal is likewise carried out with the two catches in the open
position.
All connections must be programmed with module and point, so
in principle it does not matter where the connections are made, as
long as it takes place on a correct type of input or output.
• The controller is the first module, the next one is 2, etc.
• A point is the two or three terminals belonging to an input or
output (e.g. two terminals for a sensor and three terminals for a
relay).
The preparation of the connection diagram and the subsequent
programming (configuration) should take place at the present
time. It is most easily accomplished by filling in the connection
survey for the relevant modules.
Principle:
Name On module On Point Function
fx Compressor 1 x x ON
fx Compressor 2 x x ON
fx Alarm relay x x OFF
fx Main switch x x Close
fx P0 x x AKS 32R 1-6 bar
The connection survey from the controller and any extension
modules are uploaded from the paragraph "Module survey. E.g.
controller module:
SignalModulePoint Terminal
1 (AI 1)1 - 2
2 (AI 2)3 - 4
3 (AI 3)5 - 6
4 (AI 4)7 - 8
Signal type /
Active at
Module Point
Mind the numbering.
The right-hand part of the
controller module may look like
a separate module. But it isn’t.
Tip
The Appendix shows 80 general installation types.
If your plant closely resembles one of those shown, you
can use the connection points indicated for it.
- Columns 1, 2, 3 and 5 are used for the programming.
- Columns 2 and 4 are used for the connection diagram.
Supply voltage is only connected to the controller module. The
supply to the other modules is transmitted via the plug between
the modules. The supply must be 24 V +/-20%. One transformer
must be used for each controller. The transformer must be a class
II. The 24 V must not be shared by other controllers or units. The
analog inputs and outputs are not galvanically separated from the
supply.
The + and – 24V input must not be earthed.
If using stepper motor valves, the supply for these must be provided from a separate power supply. See AK-XM 208C.
It will also be necessary to safeguard the voltage to the controller
and valves using UPS.
Example continued:
Controller module 8 VA
+ 1 extension module in 100-series 2 VA
------
Transformer size (least) 10 VA
Transformer size
The power consumption grows with the number of modules used:
Module Type Number á Effect
Controller 1 x 8 = 8 VA
Extension module 200-series _ x 5 = __ VA
Extension module 100-series _ x 2 = __ VA
Total ___ VA
Common pressure transmitter
If several controllers receive a signal from the same pressure transmitter, the supply to the affected controllers must be wired so that
it is not possible to switch off one of the controllers without also
switching off the others. (If one controller is switched off, the signal will be pulled down, and all the other controllers will receive a
signal which is too low)
Remove the protective cap from the connection plug on the
right-hand side of the basic module.
Place the cap on the connection plug to the right of the extension module that is to be mounted on the extreme right-hand
side of the AK assembly.
2. Assemble the extension module and the basic
module
The basic module must not be connected to voltage.
In our example one extension module is to be fitted to the basic
module. The sequence is thus:
All the subsequent settings that affect the two extension modules are
determined by this sequence.
When the two snap catches for the DIN rail mounting are in the open
position, the module can be pushed into place on the DIN rail – regardless of where the module is on the row.
Disassembly is thus done with the two snap catches in the open position.
Warning
Keep signal cables separate from
cables with high voltage.
The screen on the pressure transmitter
cables must only be connected at the
end of the controller.
Case cleanng
2. Connect LON communication network
The installation of the data communication must comply with
the requirements set out in document RC8AC.
3. Connect supply voltage
Is 24 V, and the supply must not be used by other controllers or
devices. The terminals must not be earthed.
4. Follow light-emitting diodes
When the supply voltage is connected the controller will go
through an internal check. The controller will be ready in just
under one minute when the light-emitting diode ”Status” starts
flashing slowly.
5. When there is a network
Set the address and activate the Service Pin.
When the controller is set correct on the network the LED "status" will flash quickly for 10 minutes.
6. The controller is now ready to be configured.
Internal communication
between the modules:
Quick flash = error
Constantly On = error
■ Power
■ Comm
■ DO1 ■ Status
■ DO2 ■ Service Tool
■ DO3 ■ LON
■ DO4 ■ I/O Extension
■ DO5 ■ Alarm
■ DO6
■ DO7 ■ Display
■ DO8 ■ Service Pin
Status on output 1-8
Slow flash = OK
Quick flash = answer from gateway
in 10 min. after network
installation
Constantly ON = error
Constantly OFF = error
External communication
Flash = active alarm/not acknowledged
Constant ON = Active alarm/acknowledged
We have decided to work on the basis of the example we went
through previously, i.e. a frost appliance with 3 evaporators.
The example is shown overleaf.
PC with the program “Service Tool” is connected to the controller.
The controller must be switched on first and the LED “Status” must
flash before the Service Tool programme is started.
For connecting and operating the "AK service tool" software,
please see the manual for the software.
The first time the Service Tool is connected to a new version of a controller the start-up of the Service Tool will take longer than usual while
information is retrieved from the controller.
Time can be followed on the bar at the bottom of the display.
Start Service Tool programme
Login with user name SUPV
Select the name SUPV and key in the access code.
When the controller is supplied the SUPV access code is 123.
When you are logged into the controller an overview of it will always
appear.
(In case the overview is empty. This is because the controller has not yet
been set up.)
The red alarm bell at the bottom right tells you that there is an active
alarm in the controller. In our case the alarm is due to the fact that the
time in the controller has not yet been set.
Press the orange setup button with the spanner at the bottom
of the display.
2. Select Authorization
When the controller is supplied it has been set with standard authorization for different user interfaces. This setting should be changed and
adapted to the plant. The changes can be made now or later.
You will use this button again and again whenever you want to get to
this display.
On the left-hand side are all the functions not shown yet. There will be
more here the further into the setup we go.
Press the line Authorization to get to the user setup display.
3. Change setting for the user ‘SUPV‘
4. Select user name and access code
Mark the line with the user name SUPV.
Press the button Change
This is where you can select the supervisor for the specific system and a
corresponding access code for this person.
The controller will utilize the same language that is selected in the
service tool but only if the controller contains this language. If the
language is not contained in the controller, the settings and readings
will be shown in English.
5. Carry out a new login with the user name and the
new access code
To activate the new settings you must carry out a new login to the controller with the new user name and the relevant access code.
You will access the login display by pressing the icon at the top left
corner of the display.
The controller can only be configured when
it is unlocked.
It can only be adjusted when it is locked.
Changes to the input and output settings
are only enabled when the controller is
“Locked”
The values can be changed when it is locked,
but only for those settings that do not affect
the configuration.
In general
Many settings are dependent on previous settings. This is shown by the fact that a function
can only be seen (and thus set) if an earlier
parent function allows access to this subordinate function
If you want to know more about the different configuration options, they are listed below.
The number refers to the number and picture in the
column on the left.
3Main Switch
Used to start and stop regulation.
When the main switch is set to Off, all outputs
are in standby mode and all alarms are
cancelled.
The main switch must be set to Off before the
Configuration lock can be Unlocked.
Configuration lock
The controller can only be fully configured
when the configuration lock is set to Unlocked.
The settings are only applied when it is set
to Locked again. At this point, the controller
checks the functions set and compares them
with the input and output settings.
Important settings can then no longer be
changed unless the configuration is unlocked
again.
4. Select Unlocked
Select Unlocked and press OK.
For example, the “Configuration lock” line will not
be shown if the main switch is set to On. Only
when the main switch is set to Off, and regulation
has therefore been stopped, is it possible to set
the configuration lock.
All system settings can be changed by pressing
in the blue field with the setting and then indicating the value of the required setting.
3Controller name
In the first field you enter a name for what the
controller will be controlling.
Main frequency
Set frequency.
Alarm language
Select the language that alarm text should be
displayed in here.
Alarm text can be in a different language to
the operating language.
Clock
When the time is set the PC’s time can be
transferred to the controller.
When the controller is connected to a network, date and time will automatically be set
by the system unit in the network. This also
applies to change-over Daylight saving.
Power failure, the clock will be kept running
for at least 12 hours.
When the installation type is to be
configured, it can be done in two
ways:
Either one of these two
In the example, we have decided
to use the second method. Here we
select:
• 3 evaporators
• AKV valve
• Refrigerant = R134a
• Defrost
• Defrost = electric
4. Other settings
After the selection of application we
will go through the other setup displays
to check whether changes will have to
be made on some of the predefined
settings.
In our example we have to select a
refrigerant, (which is done on the
screen shown above) and we must
add external start/stop settings (which
is done in the subsequent “Common
functions” screen).
• Check the settings opposite the
individual functions
This setting give a choice between a number of predefined combinations, which at the same time determine
the connection points.
At the end of the manual there is an overview of the options and connection points.
After configuration of this function, the controller will
shut down and restart. After the restart, a large number
of settings will have been made. These include the connection points. Continue with the settings and check the
values.
If you change some of the settings, the new values will
come into force.
Number of evaporators
Select the number of evaporators that you want the
controller to regulate.
Valve type
Select the relevant type of valve here.
AKV valve
LLSV, solenoid valve (at thermostatic expansion valve).'
STEP (ETS / CCM / CCMT valve)
AO (analog voltage)
Scaling factor for step valve and AO
The valve capacity can be minimized here.
LLSV, Solenoid valve (at stepper valve)
LLSV delay off
Delay time after stepper begins to close until solenoid
valve closes.
Refrigerant
Here you can select from a range of pre-defined refrigerants. If you cannot find the refrigerant you want in the
list, select “User-defined”. You can then set 3 constants
which represent the refrigerant. You can obtain these 3
constants from Danfoss.
Defrost control
Select whether you want the evaporators to regulate
with defrost.
Defrost type
You can select either natural defrost or electrical defrost,
hotgas defrost or warm brine defrost.
The setup menu has now changed.
It now shows more settings all of
which are based on the selected
plant type.
For example, earlier we selected 3
evaporators. This means that 3 sections are now displayed.
In our example we select:
• On/off thermostat
• Individual thermostat on each
section
• Night setback
• No melt function, as this is a frost
appliance
The settings are shown here in the
display.
Depending on your settings, further settings may then
be available for the selected functions.
This list in the right-hand column contains all the possible functions that may be made available in one way
or another.
If you want to know more about the individual functions than the brief description below, you will find
additional information in Chapter 5 of the manual.
3 Thermostat type
Choose from the following thermostat functions:
• 1 valve for all /common ON-OFF thermostat
Here, only one valve is used for all evaporators. The temperature is controlled by an ON/OFF thermostat on the
basis of the settings in the A section.
• 1 valve per evap/ common ON/OFF thermostat
Here, one valve per evaporator is used. The temperature
is controlled in all evaporator sections by an ON/OFF
thermostat on the basis of the settings in the A section.
• 1 valve per evaporator / individual ON/OFF thermostat
Here, one valve per evaporator is used. The temperature
is controlled individual by ON/OFF in each evaporator
section.
• 1 valve per evaporator /individual modulating thermostat
Here, one valve per evaporator is used. The temperature is
controlled individually in each evaporator section according to a modulating principle
External reference via voltage
Select whether to use an external voltage signal for displacement of the thermostat reference.
Offset at max. signal
Offset value at max. signal (5 or 10V).
Offset at min. signal
Offset value at min. signal (0,1 or 2V).
Day/ night control
Select whether the thermostat temperature is raised for
night operation
(Night offset values must be set in the individual sections
and in Kelvin)
Night displacement via DI
Select whether night displacement is to take place with
an input signal. (Alternatively, the signal can be generated
from the internal weekly schedule or from the system
administrator via data communication.)
Thermostat band
Select whether you want the thermostat to switch between two reference settings (the values can be set in the
individual sections)
Select whether the switch should be initialised by pulse
pressure or by a switch.
Thermostat band select via DI
Select whether the reference is to be made with a signal on
a DI input.
Melt function
Select whether you want the controller to perform a melting function
Melt interval
Set the time period between two melting intervals
Melt time
Set the melting time
Flood Evap
Choose from the following functions:
• Disconnected. Liquid flow is not permitted
• Liquid flow SH only. Stopped by a signal from the system
device.
• Liquid flow Common DI. Stopped by a common DI signal
Example:
The settings are shown here in the
display.
There are several pages, one after
the other.
The black bar in this field tells you
which of the pages is currently
displayed.
Move between the pages using the
+ and - buttons.
Repeat the steps above for each
section.
In our example, the settings are the
same for all 3 sections.
Stepper valve
ETS 12½, 25, 50, 100, 250, 400, CCM, CCMT or User selection.
At User selection: + Max operating steps, Hysterese, Step rate,
Holding current, Overdrive init, Phase current, Soft landing unit,
Failsafe pos.
Thermostat temperature
In the case of a common thermostat: Choose which sensors are to
be included in temperature regulation: Weighted S3A-S4A, lowest
of all S3s, average of all S3s, highest of all S3s, lowest of all S4s,
average of all S4s or highest of all S4s.
Air temperature S4 Day
Sensor selection for the thermostat during day operation
At 100%, only S4 is used. At a lower value, S3 is also used in the
thermostat function. At 0%, only S3 is used in the thermostat
function.
Air temperature S4 Night
As above, but for night operation
Cutout 1
The thermostat’s cutout temperature - Thermostat band 1
Differential 1
Differential on regulation according to Thermostat band 1
Cutout 2
The thermostat’s cutout temperature - Thermostat band 2
Differential 2
Differential on regulation according to Thermostat band 2
Night setback
Displacement of the reference during night operation
Display control
Select whether you want to connect to display type EKA 163B /
EKA 164B to indicate the appliance temperature for section A. Settings are: non, weighted S3/S4 or product temperature sensor.
Display unit
Select whether you want temperatures and pressure displayed in
SI units (°C) or US units (°F)
Display S4 %
Sensor selection for the temperature shown on the display
At 100%, only S4 is used. At a lower value, S3 is also used. At 0%,
only S3 is displayed.
Display Offset
Any offset for the display readout
Max. Disp -d- delay
Max. duration of -d- in display.
S4 Frost protection
Select whether an alarm is triggered in the case of low S4 temperature
S4 Frost limit
Set the alarm level for the S4 sensor.
4Alarm thermostat
Select whether you want to activate the alarm thermostat
Alarm air S4%
Set the weighting of the S4 sensor for the alarm thermostat
High alarm limit 1
Alarm limit for high temperature alarm, thermostat band 1
High alarm limit 2
Alarm limit for high temperature alarm, thermostat band 2
High delay
Time delay for a high temperature alarm
High delay pulldown
Time delay during pull-down and after defrost
Low alarm limit 1
Alarm limit for a low temperature alarm, thermostat band 1
Low alarm limit 2
Alarm limit for a low temperature alarm, thermostat band 2
Low delay
Time delay for a low temperature alarm
Product sensor
Indicate whether a product sensor is used
High alarm limit 1
Alarm limit for high product temperature, thermostat band 1
High alarm limit 2
Alarm limit for high product temperature, thermostat band 2
Example:
The settings are shown here in the
display.
If the controller’s internal defrost
schedule is used to start defrost,
the start times must be set using
the everyday user interface. See
page 65.
Note!
If the injection is controlled with a analog signal to a 3rd
party valve the setting "Adaptive defrost" is not recommended.
3 Defrost control
Select whether you want the controller to control defrost.
Defrost type
Choose a defrost method (electric / natural / hot gas or warm
brine)
Adaptive defrost
The function can be set to: "Not used"/"Monitor ice"/"Permit
cancellation of defrost for day (Skip day)"/"Skip day/
night"/"Full adaptive defrost".
Min. time between defrosts
Set how often defrosting is allowed.
Pc signal for AD (Adaptive defrost)
Choose which signal is to be followed: an internal signal (Local) or a signal via data communications (Network).
Defrost schedule
Choose which schedule is to be followed: an internal schedule or an external schedule from the system unit
Defrost start via DI
Select whether defrost should start when a signal is received
on a DI input
Max. defrost interval between defrosts
Defrost is started at the set interval if it is not started using
other methods (manual start, weekly schedule, network, DI).
If defrost is started using a schedule, “Max. interval” should be
set to a value greater than the longest period between two
defrosts in the schedule.
Fan run during defrost
Specify whether the fans should be on during defrost.
Defrost stop method
Define whether defrost is to be concluded with:
• Time, Temperature individual in each section or Temperature common for all sections
Defrost term sensor
Select the sensor that you want to give the signal for defrost
stop
Stop temperature A, B, C, D
Set the temperature at which defrost should stop
Max. defrost time
Defrost will stop after this period, even if the defrost temperature has not been reached
Min. defrost time
Defrosting cannot be stopped until the set time has expired.
The setting has higher priority than "Max. defrost time"
Pump down delay
Time delay before defrost when the fluid injection stops and
the evaporator is emptied of liquid
Hot gas delay
Delay time before opening of hot gas valve
Drip off delay
Time delay after defrost to allow water droplets to drip off
the evaporator before refrigeration is restarted
Drain delay
Delay in which the drain valve is kept open in order to ensure
pressure equalisation
Fan delay
Maximum permitted fan delay following defrost
Fan start temperature
The fans will start when the temperature at the defrost sensor falls below this value.
Drip tray heater
Set whether there is to be heating in the drip tray
Drip tray heater delay
Set heating time (time from the point at which defrost stops )
Max. Hold time
Maximum hold time that the controller will wait for the signal
to restart refrigeration (used with coordinated defrost)
Show advanced adaptive defrost
All settings for this function are expert settings.
Example:
The settings are shown here in the
display.
Example:
The settings are shown here in the
display.
3Common functions for fans and rail heat
Fan control
Select required fan control:
• Single fan (one relay)
• two speed fan (two relais)
• EC fan (analogue voltage output)
• VSD fan (analogue voltage output + one start relay)
Fan pulsing at cutout
Select whether you want the fans to pulse during the
thermostat’s cutout period. Pulsing can be restricted to
either: “night operation only” (appliance with night cover)
or “both day and night operation” (cold storage room)
Fan eco during thermostat cutout
Select when the fans should run on low speed:
• Never
• Both day and night
• Night only
Fan ON % (at single fan)
Set how long the fans should be ON during pulsing. Enter
as a percentage of the pulse period.
Fan duty cycle (at single fan)
Set the fan’s operation period for pulsing
Fan day (at EC or VSD)
Fan speed during normal day operation
Fan night (at EC or VSD)
Fan speed during normal night operation
Fan day eco (at EC or VSD)
Fan speed during day operation and thermostat cutoutFan night eco (at EC or VSD)
Fan speed during night operation and thermostat cutout
EC min start speed (at EC or VSD)
Lowest speed the first 10 seconds after start
Fan stop on S5
Select whether the fans should stop if the S5A temperature is too high. Used to stop the fans if refrigeration is not
working.
Fan stop temp.
Set the temperature limit for the S5A sensor at which the
fans stop
Rail heat control
Select whether to use pulsing/rail heat control. Non/Timer
or Dew point.
Rail ON at day
Set how long the rail heat should be ON for during day
operation. Enter as a percentage of the rail heat pulse
period
Rail heat at night
Set how long the rail heat should be ON for during night
operation. Enter as a percentage of the rail heat pulse
period.
Dew point max. limit
At a dew point above this value, rail heat is 100%.
Dew point min limit
At a dew point below this value, rail heat is controlled
with the next setting "Min ON".
Rail heat Min ON%
Period in which the dew point is below the min. limit.
Rail heat cycle time
Rail heat pulse period.
Rail heat during defrost
Select whether you want the rail heat to be OFF during
defrost.
4Common functions for compressor and case cleaning
Compressor control
Select whether you want to use compressor control
Min. ON time
Set the minimum runtime for the compressor once it has
started
Min. Restart time
Set the minimum time between the compressor stopping
Example:
The settings are shown here in the
display.
Case cleaning via DI
Select whether to use a digital input to activate
the case cleaning function. Alternatively the
case cleaning function can be activated from the
display or using a parameter setting
Defrost at case cleaning
Select whether to activate the case cleaning
function with a defrost sequence. Used for frost
appliances to achieve fast defrost of the appliance before cleaning.
Appliance shutdown
Select function for light and fans when appliance shut down
5Common functions for door, light etc.
Door switch mode
Select the function of any door switch. The door
switch can be used in one of the following two
ways:
• Alarm only, if the door has been left open for
too long
• Stop refrigeration and fans when the door is
open, along with an alarm if the door has been
left open for too long
Light off delay
Set how long the light should remain on after
the door has been closed (requires a light
control to be set up and controlled via the door
switch)
Restart refrig. delay
Set how long the door may be open before
refrigeration and fans are restarted. Prevents
exposure of the products to too high a temperature if someone forgets to close the door.
Door alarm delay
If the door has been open for more than the time
delay set here, a door alarm is triggered
Light control
Select whether the light should be controlled by
a door switch, a day/night signal or by a signal
via data communication
Light at Main SW = Off
Choose whether the light is to be switched off
when the main switch is set to off, or if the light
is to follow the standard light control.
Control of Blinds control
Set whether the blinds are to be controlled by
a relay.
Open/close blinds via DI
Set whether the controller is to receive a signal
which activates the blinds. This must be a pulse
signal.
Fan stop during close night blinds
Set the number of seconds the fans must be
switched off.
Refrigerant leak
A DI input is reserved for the refrigerant alarm
Alarm delay
Time delay before alarm is transmitted
Forced closing via DI
Select whether a digital input is used for the
forced closing of injection
Fan at forced closing
Select whether or not you want the fans to operate during forced closing and whether defrosting is to be permitted during this period.
Alarm relay
Select the alarm relay function.
The alarm relay must be activated by alarm
priorities:
• low to high
• low to medium
• high
The alarm relay can be activated either by all
alarm priorities from low to high or only by high
priority alarms
Ext. main switch
Select whether you want a main switch via a
digital input. When the main switch is set to Off,
all regulation is stopped, all outputs are set to
standby and all alarms are cancelled.
In our example we are not using
this function so the image is more
for information purposes.
The name of the function can be xx
and the alarm text can be entered
further down the screen).
3 - General alarm input
This function can be used to monitor all kinds of digital
signals.
In our example we are not using this function
so the image is more for information
purposes.
The name of the function can be xx and the
alarm text can be entered further down the
screen).
3 - Thermostats
The general thermostats can be used to monitor
the temperature sensors that are used in the
control, as well as 4 extra temperature sensors.
Each thermostat has a separate outlet to control
external automation.
No. of thermostats
Set the number of general thermostats. (1-5)
For each thermostat adjust
• Name
• Which of the sensors is used
Actual temp.
Temperature measurement on the sensor that is
attached to the thermostat
Actual state
Actual status on the thermostat outlet
Cut out temp.
Cut-out value for the thermostat
Cut in temp.
Cut-in value for the thermostat
High alarm limit
High alarm limit
Alarm delay high
Time delay for high alarm
Alarm text high
Indicate alarm text for the high alarm
Low alarm limit
Low alarm limit
Alarm delay low
Time delay for low alarm
Alarm text low
Indicate alarm text for low alarm
Via the +- button you can move to
similar settings for the pressure control
functions. (Not used in the example)
3b - Pressostats
There are equal settings for up to 5 pressostat
functions
In our example we are not using this function
so the image is more for information
purposes.
The name of the function can be xx and the
alarm text can be entered further down the
screen).
The values ”Min. and Max. Readout” are your
settings representing the lower and upper
values of the voltage range. 2V and 10V, for
example. (The voltage range is selected during
the I/O setup).
For each voltage input defined the controller
will reserve a relay output in the I/O setup.
It is not necessary to define this relay if all
you require is an alarm message via the data
communication.
3 - Voltage inputs
The general volt inlet can be used to monitor
external voltage signals. Each volt inlet has a
separate outlet to control external automatic
controls.
No. of voltage inp.
Set the number of general voltage inputs,
specify 1-5:
Name
Actual value
= read-out of the measurement
Actual state
= read-out of outlet status
Min. readout
State read-out values at minimum voltage signal
Max. readout
State read-out values at maximum voltage signal
Cutout
Cut-out value for outlet (scaled value)
Cutin
Cut-in value for outlet (scaled value)
Cutout delay
Time delay for cut-out
Cut in delay
Time delay for cut-in
Limit alarm high
High alarm limit
Alarm delay high
Time delay for high alarm
Alarm text high
Set alarm text for high alarm
Limit alarm low
Low alarm limit
Alarm delay low
Time delay for low alarm
Alarm text low
Indicate alarm text for low alarm
The following displays will depend on the earlier definitions. The
displays will show which connections the earlier settings will require.
The tables are the same as shown earlier.
• Digital outputs
• Digital inputs
• Analog outputs
• Analog inputs
Important!
An AKV function can only be set for module 1
and only for points 12, 13, 14 and 15
3. Configuration of Digital outputs
Press the +-button to go on to the
next page
4. Setup On/off input functions
Press the +-button to go on to the
next page
LoadOutput
AKV ADO1112-
AKV BDO2113-
AKV CDO3114-
FanDO4115ON
Defrost A
Defrost B
Defrost CDO7118ON
Rail heatDO8119ON
We set up the controller’s digital outputs by keying in which module
and point on this module each one of these has been connected to.
We furthermore select for each output whether the load is to be active
when the output is in pos. ON or OFF.
FunctionInput
External start/stopAI323Closed
Case cleaning (pulse
pressure)
We set up the controller’s digital input functions by keying in which
module and point on this module each one of these has been connected
to.
We furthermore select for each output whether the function is to be active when the output is in pos. Closed or Open.
DO5116ON
DO6117ON
AI424Closed
Module
Module
PointActive at
PointActive at
3 - Outputs
The possible functions are
the following:
AKV or solenoid valve
LLSV_ (Solenoid valve)
Defrost (el/hot gas)
Common defrost
Suction line valve
Drain valve
Drip tray heat
Night blind
Compressor
Rail heat
Light
Fan
Alarm
Thermostat 1 - 5
Pressostat 1 - 5
Voltage input 1 - 5
4 - Digital inputs
The possible functions are
the following:
Night displacement
Door alarm
Forced closing
Ext. Main switch
Thermostat band
Defrost start
Case cleaning
Appliance shutdown
Open / close Night blinds
DI alarm input 1-10
Refrigerant alarm (CO2)
Analog output
(settings are not shown)
The possible signals are as
follow:
0 – 10 V
2 – 10 V
0 – 5 V
1 – 5V
The type of Step valve defined in earlier sectons.
Very many functions have an alarm connected.
Your choice of functions and settings has connected all the relevant
alarms that are current. They will be shown with text in the three
pictures.
All alarms that can occur can be set for a given order of priority:
• ”High” is the most important one
• ”Log only” has lowest priority
• ”Disconnected” gives no action
The interdependence between setting and action can be seen in the
table.
3. Set priorities for Temperature alarms
Press the +-button to go on to the next page
Setting
HighXXXX1
MediumXXX2
LowXXX3
Log onlyX4
Disconnected
In our example we select the settings shown here in the display
LogAlarm relay selectionNet-
NonHighLow - High
work
AKM dest.
4. Set Alarm priorities for sensor error
In our example we select the settings shown here in the display
The controller will now make a comparison of selected functions and define inputs and outputs. The result can be seen in
the next section where the setup is controlled.
The setup of the controller has now been locked. If you subsequently
want to make any changes in the controller’s setup, remember first to
Before the control starts, we check that all the settings are as they should
be.
The overview display will now show one line for each of the general
functions. Behind each icon there is a number of displays with the
different settings. It is all these settings that have to be checked.
3. Settings for thermostat
4. Move on with the next display for the section. Here
the alarm thermostat
Press the blue overview button at the bottom left of the
display.
5. Settings for alarm thermostat
Remember the settings at the bottom of the pages – the ones that can
only be seen via the ”Scroll bar”.
Page 2 shows a summary of the temperature
sequence over the past 24
hours.
Remember the settings at the bottom of the pages – the ones that can
Turn the right-hand address switch so that the arrow will point
at 3.
The arrow of the two other address switches must point at 0.
2. Push the Service Pin
Press down the service pin and keep it down until the Service
Pin LED lights up.
The controller has to be remote-monitored via a network. In this net-
work we assign address number 3 to the controller.
The same address must not be used by more than one controller in the
same network.
Requirement to the system unit
The system unit must be a gateway type AKA 245 with software version
6.0 or higher. It is capable of handling up to 119 AK controllers.
Alternatively, it can be an AK-SM 720. It is capable of handling up to 200
AK controllers.
3. Wait for answer from the system unit
Depending on the size of the network it may be up to one
minute before the controller receives an answer as to whether
it has been installed in the network.
When it has been installed the Status LED will start to flash
faster than normal (once every half second). It will continue
with this for about 10 minutes
4. Carry out new login via Service Tool
If the Service Tool was connected to the controller while you
installed it in the network, you must carry out a new login to
the controller via the Service Tool.
If there is no answer from the system unit
If the Status LED does not start flashing faster than normal, the controller has not been installed in the network. The reason for this may be
one of the following:
The controller has been assigned an address out of range
Address 0 cannot be used.
If the system unit in the network is an AKA 243B Gateway only the addresses between 1 and 10 can be used.
The selected address is already being used by another controller or
unit in the network:
The address setting must be changed to another (vacant) address.
The wiring has not been carried out correctly.
The termination has not been carried out correctly.
The data communication requirements are described in the document:
”Data communication connections to ADAP-KOOL® Refrigeration Controls” RC8AC.
Press the blue overview button at the bottom left of the display.
2. Go to the Alarm list
Press the blue button with the alarm bell at the bottom of the
display.
3. Check active alarms
In our case, we have a series of alarms. We will tidy them up so that we
only have those that are relevant.
4. Remove cancelled alarm from the alarm list
Press the red cross to remove cancelled alarms from the alarm
list.
5. Check active alarm again
In our case an active alarm remains because the control has stopped.
This alarm must be active when control has not started. We are now
ready for the startup of control.
Please note that active plant alarms are automatically cancelled when the
main switch is in pos. OFF.
If active alarms appear when the control is started the reason for these
should be found and remedied.
Press the blue overview button with the log symbol.
2. Log display
3. New logs
The top line gives access to definition of new logs and to
changes of already established logs.
The next line enables you to see a selection of the defined logs
Here is the start display for new logs
Start by defining which type of log has to be defined
Here it is determined which parameters have to be included
in the setup of data.
Select a function here, then a parameter, and finish with OK.
Press hereafter "Arrow right"
Here is the survey of all the parameters that are collected in
the log.
If a parameter has to be removed from the log collection, you
must select the parameter and then press "Arrow left".
AK-CC 750A controllers are complete regulating units which
together with valves and sensors constitute complete evaporator
controls for refrigeration appliances and freezing rooms within
commercial refrigeration.
Generally speaking they replace all other automatic controls containing, inter alia, day and night thermostats, defrost, fan control,
rail heat control, alarm functions, light control, etc.
The controller is equipped with data communication and is operated via a PC.
In addition to evaporator control the controller can give signals to
other controllers about the operating condition, e.g. forced closing of expansion valves, alarm signals and alarm messages..
Examples
The controller has been designed to control one of the following
four plant types.
Through the programming you determine which one.
Evaporator control of one, two, three or four evaporators
(ETS)
Control of cool or defrost room
The controller’s main function is to control the evaporator so that
the system constantly operates with the most energy-friendly
refrigeration.
A specific function for registration of the need for defrost will
adapt the number of defrosts so that no energy is wasted on unnecessary defrosts and subsequent cooling-down cycles.
Among the different functions can briefly be mentioned:
• Control of up to four evaporator sections
• Electronic injection with AKV or stepper valve
• ON/OFF or modulating temperature control
• Weighted thermostat and alarm thermostat
• Defrost on demand based on evaporator capacity
• Appliance cleaning function
• Appliance shutdown via data communication
(The functions may not be mixed across the various sections of
the evaporator.)
The complete survey of controllers and functions can be seen in
the manual chapter 2 in section "Design o a evaporator control".
Control of cool or defrost appliance
• The refrigerant is either regulated by means of:
Up to 4 valves can be connected to the controller; one for every
solid state output.
It is possible to use electrically controlled expansion valves type
AKV (ETS) for regulation, or else injection can take place using
thermostatic expansion valves (TEV) in which the temperature
is regulated using solenoid valves in the liquid line (LLSV), e.g.
Danfoss type EVR.
(ETS)
The thermostat function can be defined in different ways depending on which application it is used for. For example:
• regulation principle /
• what sensors are to be used /
• whether the user wishes to toggle between two temperature
settings, etc.
It is necessary for at least one air sensor to be fitted for every evaporator section. This is applicable irrespective of which thermostat
function is selected – including "no" thermostat. The thermostat's
cut-out temperature also has to be set to the correct air temperature as this value is used by the injection function.
The thermostat can control the temperature via:
• a signal from the S3/S4 sensors in section A, or
• min/max or average temperatures in all the sections used (see
the section on sensor selection)
AKV valve
This principle can also be used with electronic expansion valves
type AKV; e.g. refrigeration appliances where one valve is used for
two evaporators. These appliances are specially designed for this
application as the evaporator area is divided over two refrigeration
sections in order to achieve a consistent load over the two circuits.
One valve for every evaporator + common ON/OFF thermostat
Here, one valve is used per evaporator and the temperature is
controlled according to the ON/OFF principle in accordance with
the thermostat settings in section A
.
Thermostat type= ON/OFF
One common valve for all evaporators + common ON/OFF thermostat
A line up of refrigeration appliances which are to be regulated to
the same temperature is a typical example.
The temperature is controlled according to the ON/OFF principle
in accordance with the thermostat settings in section A.
The thermostat can control the temperature via:
• a signal from the S3/S4 sensors in section A, or
• min/max or average temperatures in all the sections used (see
the section on sensor selection)
One valve for every evaporator + individual ON/OFF thermostat
Here, one valve is used per evaporator and the temperature is
controlled individually in each evaporator section according to the
ON/OFF principle.
The thermostat in every section controls the temperature via the
S3/S4 sensors in every section (where appropriate, see the section
on sensor selection).
The thermostat in each section controls the temperature via the
S3/S4 sensors in each section.
During cooling and in the case of major load variations in which
the temperature falls outside of the thermostat limits, injection
is regulated so that the evaporator operates with the minimum
possible stable superheating. This ensures that the cooling process
takes place as quickly as possible.
In the case of stable loads, the thermostat will reduce the opening time for the AKV valve, so the through flow of refrigerant is
restricted to precisely the amount that is required to maintain the
temperature at the required reference (area control).
The reference temperature will be the set cut-out temperature +
half the difference.
The cut-out temperature and difference are set as in the case of
a standard On/Off thermostat. The difference should not be set
to less than 2K. (In the case of a smaller difference, load changes
could interfere with the modulating thermostat function.)
One solenoid valve for each evaporator + modulating thermostat
Here, one valve is used per evaporator and the temperature is
controlled individually in each evaporator section according to the
modulating thermostat principle.
Thermostat type = Modulating
Modulating temperature regulation maintains a more constant
temperature and also equalises the load on the system so that the
compressors have better operating conditions.
• This function can only be used on:
- central systems with AKV valves
- central systems with solenoid valves
- brine systems with solenoid valves.
• Each of the individual evaporator sections is controlled individually using a modulating thermostat function.
• Cut-out value and difference must be set as with an ON/OFF
thermostat.
One AKV valve for each evaporator + modulating thermostat
Here, one valve is used per evaporator and the temperature is
controlled individually in each evaporator section according to the
modulating thermostat principle.
With solenoid valves, a pulse modulating principle is used with an
adjustable period. The valve is opened and closed within a period
(e.g. 5 minutes). A PI controller calculates how long the valve
needs to be open in order to maintain the most constant temperature.
The reference temperature will be the set cut-out temperature +
half the difference.
The cut-out temperature and difference are set as in the case of
a standard On/Off thermostat. The difference should not be set
to less than 2K. (In the case of a smaller difference, load changes
could interfere with the modulating thermostat function.)
The current load on the appliance can be read off in the form of
the valve's opening time as a percentage of the set period.
To achieve even loading on the compressors, a desynchronising
function has been built in which ensures that the times for solenoid valve opening are displaced.
Within the same controller
If several valves are used on the same controller, the opening
times are displaced in relation to one another. For example, if two
valves are used, the opening of these is displaced in relation to
one another by half a period.
Between controller
Displacement of the opening of the solenoid valves takes place
on the basis of the controllers' address settings. If a period time of
300 seconds (factory default) is used, the opening of the solenoid
valves for the A section will be displaced by 15 seconds x last digit
in the address setting, e.g.:
Addresses 0, 10, 20: are shifted by 0 seconds
Addresses 1, 11, 21: are shifted by 15 seconds, etc.
This desynchronisation between controller takes place during
start-up and once a day at around midnight, 00:00
Address / Section
10 / A
10 / B
If AKV (stepper) valves are used, at least one sensor must always
be used in every section, irrespective of the choice of thermostat
function. This measurement is used by the injection function for
the superheat controller.
Common thermostat
When a common thermostat is used, the thermostat settings in
section A are used to control the air temperature.
The thermostat temperature can be either a weighting of the
S3 and S4 sensors in section A, as described for the individual
thermostat. This will typically be used in cold storage rooms and
freezer rooms in which several evaporators are controlled according to a common temperature.
11 / A
11 / B
12 / A
12 / B
22 / A
22 / B
Thermostat sensor
Individual thermostat
When individual thermostat control is used in every section, the
temperature is controlled on the basis of the air temperature sensors S3, S4 or both.
Alternatively, the thermostat temperature can be a minimum
value, a maximum value or an average value of all S3 or S4 sensors for the refrigeration sections used. This will typically be used
where one solenoid valve is used for several appliance sections
and where it is necessary to ensure that the thermostat is taking
into account the temperature in all sections.
Min. S4 /
Max. S4 /
S4 average
Min. S3 /
Max. S3 /
S3 average
Definition of the thermostat temperature takes place using one
setting, which is based on the S4 value. With a setting of 100%,
only the S4 measurement will be used. With a setting of 0%, only
S3 will be used. With a value between 0 and 100%, both measurements will be used.
Swithc between two thermostat band (two references)
It is a good idea to use this function for refrigeration appliances
containing impulse purchases where the products are often
exchanged. Via a switch function it is possible to change between
two thermostat settings depending on the products contained in
the appliance. The change-over between two thermostat bands
is activated via a contact or via a pulse signal of at least three
seconds’ duration – as a rule via a key switch placed on the appliance. When the switch is activated the thermostat settings as well
as the limits for the alarm thermostat and the product sensor will
change.
The changeover between the two thermostat bands can also be
seen on the display, but only if the shift is set to take place with a
pulse signal.
When a change-over is activated the display will show to which
thermostat band the change goes.
Displacement of reference for thermostat
The signal may be a 0-5V, 0-10V, 1-5V or 2-10V voltage signal. Two
offset values must be set, one indicating the displacement at minimum signal and another indicating the displacement at maximum
signal. The displacement will apply to all sections.
The displacement will not affect the alarm limits.
Melting function
This function will stop the air flow in the evaporator from being reduced by frost created by uninterrupted operation for a long time.
The function is activated if the thermostat temperature has
remained in the range between -5°C and +10°C for a longer
period than the set melting interval. The refrigeration will then be
stopped during the set melting period. The frost will be melted
so that the air flow and hence the evaporator’s capacity will be
greatly improved.
The settings for melting interval and melting period are common
to all sections, but the controller will displace the melting time for
the different sections so that no synchronisation will take place.
If there are several controllers in the same defrost group the time
between the two meltings should be set differently in the individual controllers. In this way a synchronisation of the thermostats’
cutin times will be avoided.
Timer for compressor relay
If a compressor relay has been selected, the relay’s timer function
will have higher priority than the thermostat function.
In refrigeration appliances there may be big load differences
between the shop’s opening and closing hours, especially if Night
blinds/curtains are used. The thermostat reference may be raised
here without it having any effect on the product temperature.
Change-over between day and night operation can take place, as
follows:
• via the built-in weekly schedule
• via an external switch signal
• via a signal from the data communication
When night operation starts the thermostat reference will be displaced with an offset value that normally will be positive. It must
however be negative if cold accumulation is to take place.
When a Night blind is used the distribution of air in the appliance
will change radically. A change of the thermostat’s weighted S3/
S4 ratio will therefore be required. As a rule the S4 share is set at a
lower value during the night than during the day.
The thermostat reference can be displaced via an external voltage
signal which is particularly useful for process cooling.
The function is used for sounding the alarm before the product
temperature at the refrigeration site becomes critical.
You can set alarm limits and time delays for high and low temperatures. Alarm will be given if the set limit is exceeded, but not until
the time delay has expired.
There will be no alarms when refrigeration has been stopped due
to cleaning of the appliance or if the main switch is set in pos. OFF.
The alarm sensor may be chosen independently of the sensor used
for the thermostat function.
Alarm sensor
The alarm sensor may be selected as either S3 or S4, or a
weighted value of both of them.
The setting is performed as a percentage value of S4.
The weighting need not be the same as for the thermostat
function. In other words, the thermostat may regulate according to S4 and the alarm thermostat may give alarm according
to S3.
Alarm limits
Different alarm limits can be set for the individual sections. The
alarm limits are set as absolute values in °C.
If thermostat bands are used, separate limits can be set for each
thermostat band. The alarm limits are not affected if there is an
external reference displacement via a voltage signal.
During night operation the value for upper limit will raise with
the same value as night operation is raised with (a negative
night setback will not change the limit value).
Curve 1: Cooling stage
(1): Time delay has been exceeded. . Alarm be
comes active.
Curve 2: Normal regulation where the temperature
becomes too high
(2): Time delay has been exceeded. . Alarm be
comes active.
Curve 3: Temperature becomes too low
(3): Time delay has been exceeded. . Alarm be
comes active.
If regulation is carried out with two thermostat bands there will be
a set of alarm limits for each band. Time delays will be common to
the two bands.
Product sensor with alarm function
An extra temperature sensor may be connected to each section.
The sensor will function independently of the other functions.
Alarm limits and time delays can be set, as for the alarm thermostat.
Time delay
Three time delays are set for alarms:
- For too low temperature
- For too high temperature during normal regulation
- For too high temperature during cooling down
• after activation of internal or external start/stop
• during a defrost
• after a power failure
• after appliance cleaning.
The time delay will apply until the actual air temperature has
dropped below the “upper alarm limit”..
Example
Frost alarm
If the thermostat is controlled according to the S3 temperature
or a weighting of S3/S4, there could be a risk (on the refrigeration
shelves) that the evaporator’s S4 discharge temperature may become so cold that the products at the back of the shelves become
exposed to unintended frost temperatures.
To prevent this, the controller has a built-in frost
alarm. If the S4 temperature falls below a set frost
limit an alarm will be given so that the cause of the
cold outlet temperature can be found and corrected.
N: Thermostat cut-in value
OUT: Thermostat cut-out value
Lim: Alarm limit for high temperature and low temperature
S: Alarm ceases
To obtain energy savings it is possible to reduce the power supply
to the fans at the evaporators. The reduction can be done:
- during the thermostat’s cutout period (cold room)
- during night operation and during the thermostat’s cutout period (appliance with Night blind)
It can be controlled by one of the following 4 fan types:
Single speed fan
One relay is used here to control the fans. This relay can be pulse
controlled, but only when all sections/evaporators are cut out
.
A period of time is set as well as the percentage of this period of
time where the fans have to be operating.
2-speed fans
Two relays are used here to control the fans. One relay will provide full speed for the fans, and when the second relay triggers,
the speed of the fan motors is reduced. The relay for reduced
speed will be referred to as 'eco' in the setup of outputs.
Fan with EC motor
Here the controller must use an analogue output module that
can deliver the desired voltage to the EC motor. 0 - 10 V, 2 - 10 V,
0 - 5 V or 1 - 5 V.
The desired fan speed is given as a percentage of the output
signal i.e. 0 - 100 %. For example, 90 % during normal daytime
operation and 70 % during eco operation.
Different values can be set for the four operating modes: Normal
day, Normal night, Day with thermostat disconnected, Night with
disconnected thermostat.
A minimum start speed can be set. This setting will only apply for
10 seconds after the start.
Fans that are controlled by a frequency converter (VSD)
The controller must use an analog output module for these with a
starting relay for on/off control of the converter.
The settings are the same as for EC motors
Rail heat control
It is possible to pulse-control the power to the rail heat in order to
save energy. Pulse control can either be controlled according to
day/night load or dew point.
Pulse control according to day and night
Various ON periods can be set for day and night operation.
A period time is set as well as the percentage part of the period in
which the rail heat is ON.
Pulse control according to dew point
In order to use this function a system manager of the type AK-SM
720, 850, AK-SC 255 or 355 is required which can measure dew
point and distribute the current dew point to the appliance
controllers. For this the rail heat’s ON period is controlled from the
current dew point.
Effect
Railheat.
Min. ON%
Dew point
Two dew point values are set in the appliance control:
• One where the effect must be max. i.e.100%.
• One where the effect must be min.
At a dew point which is equal to or lower than the value, the effect
will be the value indicated in "Rail heat min ON%".
In the area between the two dew point values the controller will
manage the power to be supplied to the rail heat.
The current dew point and duty cycle for rail heat can be read off
Stop of fans if cooling is missing
If the refrigeration in a breakdown situation stops, the temperature
in the cold room may rise quickly as a result of the power supply
from large fans. In order to prevent this situation the controller can
stop the fans if the temperature at S5 exceeds a set limit value.
The function can also be used as a sort of MOP function during
start-up with a hot evaporator. The fans will not start until the S5
temperature has been reached below the set limit value. In other
words, the evaporator and hence the compressor wll not be so
heavily loaded during the startup phase.
The function uses the S5 sensor from section A.
The function is not active when refrigeration has stopped.
If the dew point signal cannot be distributed to a controller, the
rail heat will revert to day/night control.
During defrost the rail heat will always be 100% ON.
If rail heat ON is selected, it will run at 100% during defrost + the
time after defrost if the thermostat temperature is above the cut-
in limit (but max. 15 minutes).
Compressor control
The controller has a function that can be used for compressor
control. When the function is selected ON a relay will automatically
follow the status of the thermostat functions. The relay is ON when
the thermostat demands refrigeration. If the thermostat function
is selected OFF the compressor output will constantly be ON.
A minimum ON time and a minimum restart time for the relay
belong to the function.
The relay will be OFF during defrost.
There is display of:
- operating hours during the past 24 hours
- total number of operating hours
- number of couplings during the past 24 hours
- total number of couplings
Appliance cleaning
This function makes it easy for the shop’s staff to carry out a
cleaning of the appliance according to a standard procedure.
Function
Appliance cleaning is activated via a pulse signal of minimum
three seconds’ duration – as a rule via a key switch placed on the
appliance. It can however also be activated via data communication. Appliance cleaning is carried out via three phases:
1 - at the first activation the refrigeration is stopped, but the fans
keep on operating in order to defrost the evaporators. ”Fan” is
shown on the display.
2 - at the second activation the fans are also stopped and the
appliance can now be cleaned. ”OFF” is shown on the display.
3 - At the third activation refrigeration is recommenced. The
display will show the actual appliance temperature.
To carry out cleaning of a frost appliance as quickly as possible
cleaning can be started with a defrost sequence.
When appliance cleaning is activated a cleaning alarm is transmitted to the normal alarm recipient. A later processing of these
alarms will document that the appliance has been cleaned as
often as planned. The function saves information on when the last
appliance cleaning was carried out and how long it lasted.
Appliance shutdown
This function makes it possible to shut down a refrigeration appliance using data communication or a switch signal.
When the signal is received, refrigeration and alarm monitoring
stops.
Fans and lights will do the following depending on the setup:
• Fans continue. The light will follow the standard setup.
• Fans stop immediately. The light immediately switches off.
• Fans stop when the delay time expires. The light will follow the
standard light control.
• Fans stop when the delay time expires. The light switches off
when the delay time expires.
The shutdown delay time is adjustable and applies to both fans
and lights.
Any night curtain output will follow the light function.
Door contact
The door contact function can be defined for two different
applications:
- Door alarm
The controller monitors the door contact and delivers an alarm
message if the door has been opened for a longer period than
the set alarm delay.
- Stop of refrigeration + door alarm
When the door is opened the refrigeration is stopped, i.e. the
injection and the fan are stopped. If the door remains open
for a longer time than the set restart time, refrigeration will be
resumed. This will ensure that refrigeration is maintained even
if the door is left open or the door contact should be defective.
If the door remains open for a longer period than the set alarm
delay an alarm will also be sounded.
In both applications the alarm function will also contain a local
reminder which is activated when 75% of the set time has been
passed. This reminder only appears on the connected display and
the intention of it is that the door must be closed before the alarm
for open door is released.
From the controller the following can be read:
- the duration of the last open period
- the total open period during the past 24 hour
- number of openings during the past 24 hours
Defrost has higher priority than the door function. That is to say,
refrigeration and fans will not be started until defrost is complete.
The door contact function can also activate the light function so
that the light is turned on and kept on for a period of time after
the door has again been closed. Cf. the section on light function.
Light function
The function can be used for controlling the light in a refrigeration
appliance or in a cold room. It can also be used for controlling a
motorised night curtain.
The light function can be defined in three ways:
- the light is controlled via a signal from a door contact. Together
with this function a time delay can be set so that the light is kept
burning for a period of time after the door has been closed.
- the light is controlled via the day/night function
- the light is controlled via the data communication from a system
unit.
It is possible to set whether the light is to be switched on or off
when the main controller switch is activated.
This is set in the function "Light at main switch=off".
If "Light at main switch=off" is set to ON, the normal light function
will be maintained when the main switch is switched off.
If OFF is selected for this setting, the light will stay off when the
main switch is switched off.
Night blind
Motorised night blind can be controlled automatically from the
controller. The night blinds will follow the status of the light
function. When the light is switched on, the night blinds opens
and when the light is switched off, the night blinds close again.
When the night blinds are closed, it is possible to open them using
a switch signal on the digital input. If this input is activated, the
night blinds will open and the refrigeration appliance can be filled
with new products. If the input is activated again, the blinds close
again.
When the night blind function is used, the thermostat function
can control with different weighting between the S3 and S4
sensors. A weighting during day operation and another when the
blind is closed.
A night blind is open when the appliance cleaning function is
activated.
To ensure the correct position of the night blind the fans can be
switched off in the period during which the night blinds roll down.
Forced closing
The AKV (stepper) valves can be closed with an external signal
(the “Inject ON signal”). The function must be used in connection
with the compressor’s safety circuit, so that there will be no injection of liquid into the evaporator when the compressor is stopped
by the safety controls. (However not at low pressure – LP).
The signal can also be received from the DI-input or be received
via the data communication.
During a forced closing the fans can be defined to be stopped or
in operation.
Defrosting can also be permitted or omitted during this period.
If defrosting has been requested within 10 minutes of the end of
forced closing, defrosting will restart the moment forced closing
ends.
Alarm relay
If the controller is to give alarm at a relay output, the relay must be
defined.
A setting determines when the relay is activated:
- Only for alarms with “high” priority
- For alarms with “low” and “medium” priority
- For alarms with “low”, “medium” and “high” priority.
The controller can receive a signal from a leak detector. This signal
will not activate the alarm relay; but the alarm will be shown on
any displays that are connected.
Start/stop of regulation (main switch)
A software setting is used for starting and stopping the regulating
function.
ON = normal regulating function
OFF = Regulation stopped. All outputs will be set in standby
mode. All alarms are stopped. An alarm can however be transmitted to the effect that regulation has stopped.
The function applies to all sections.
You can also define an external switch for start/stop of the regulation.
If an external switch is defined regulation will only be carried out
when both switches are in position ”ON”.
General alarm inputs (10 units)
An input can be used for monitoring an external signal.
The individual signal can be adapted to the relevant use as it is
possible to give the alarm function a name and to indicate your
own alarm text.
A time delay can be set for the alarm.
General thermostat functions (5 units)
The function may freely be used for alarm monitoring of the plant
temperatures or for ON/OFF thermostat control. An example could
be thermostat control of the fan in the compressor compartment.
The thermostat can either use one of the sensors used by the
regulation (Ss, Sd, Sc3) or an independent sensor (Saux1, Saux2,
Saux3, Saux4).
Cutin and cutout limits are set for the thermostat. Coupling
of the thermostat’s output will be based on the actual sensor
temperature. Alarm limits can be set for low and high temperature,
respectively, including separate alarm delays.
The individual thermostat function can be adapted to the relevant
application as it is possible to give the thermostat a name and to
indicate alarm texts.
General pressure control functions (5 units)
The function may freely be used for alarm monitoring of plant
pressure or for ON/OFF pressure control regulation.
General voltage input with ancillary relay (5 units)
5 general voltage inputs are accessible for monitoring of
various voltage measurements of the installation. Examples are
monitoring of a leak detector, moisture measurement and level
signal - all with ancillary alarm functions. The voltage inputs can
be used to monitor standard voltage signals (0-5V, 1-5V, 2-10V or
0-10V). If required, one can also use 0-20mA or 4-20mA if external
resistance is placed at the inlet to adjust the signal to the voltage.
A relay outlet can be attached to the monitoring so that one can
control external units.
For each inlet, the following can be set/read out:
- Freely definable name
- Selection of signal type (0-5V, 1-5V, 2-10V, or 0-10V)
- Scaling of read-out so it corresponds to measuring unit
- High and low alarm limit including delay times
- Freely definable alarm text
- Attach a relay output with cut in and cut-out limits including
delay times
The pressure control can either use one of the sensors used by the
control function (Po, Pc) or an independent sensor (Paux1, Paux2,
Paux3).
Cutin and cutout limits are set for the pressure control. Coupling of
the pressure control’s output will be based on the actual pressure.
Alarm limits can be set for low and high pressure, respectively,
including separate alarm delays.
The individual pressure control function can be adapted to the
relevant application as it is possible to give the pressure control a
name and indicate alarm texts.
Up to four valves can be connected. One for each solid state
output.
Control can be carried out with electrically operated expansion
valves type AKV, ETS or CCMT.
Or injection can take place with thermostatic expansion valves
(TEV) where the temperature will then be regulated with solenoid
valves type EVR or similar.
If both a stepper valve and a solenoid valve are installed in the
liquid line, any liquid trapped between the two valves will be
returned if the valve is a Danfoss EVR.
Functions:
• Disconnected. Liquid flow is not permitted
• Liquid flow is permitted. Stopped by a common DI signal
• Liquid flow is permitted. Stopped by a signal from the system device. The
signal is common to all sections.
When regulating with a flooded evaporator, three separate superheat
settings are used.
It is the installer’s responsibility to ensure that signal loss to the
controller will not result in liquid throughput to the compressor.
Danfoss accepts no responsibility for damage resulting from
inadequate installation.
Scaling factor for the valve
The valve’s staging area can be limited when a step valve is
chosen or it can be guided using an analogue output signal. The
setting applies to all sections.
Pressure transmitter signal
One pressure transmitter can supply signals to several controllers
if they regulate refrigeration points on the same suction line. But if
a valve is mounted in an evaporator’s suction line, say, a KVP / KVQ
or PM, the pressure transmitter must be placed before the valve.
The signal can now only be used by the relevant controller.
Refrigerant
Adaptive superheat with AKV (stepper) valve
The evaporating temperature is measured with pressure transmitter P and the superheat with the pressure transmitter and the S2
sensor.
SH closed
The function contains an adaptive algorithm that independ-
Before regulation can be commenced, the refrigerant must be
defined.
You can directly select one of the current refrigerants:
ently adjusts the valve’s opening degree, so that the evaporator
constantly delivers optimum refrigeration at lowest possible
superheat.
The superheat reference will be limited by the settings for min.
and max. superheat.
If the superheat is very low, the valve may be closed very quickly
using the "SH closed" setting.
If a new refrigerant is demanded which is not as yet contained
on the list you may select ”User-defined” which is subsequently
set with data for the refrigerant in question. The values can be
ordered from Danfoss.
Warning: Incorrect selection of refrigerant can cause damage to
the compressor.
When the superheat has dropped to 1 K over the "SH closed" limit,
this function will reduce the degree of opening of the valve so
that the valve will with certainty remain closed if the superheat
fall to the "SH closed" value. To ensure that the close function does
not generate the general superheat regulation, the "SH closed"
setting must be at least 1K lower than "SH min".
MOP control
(MOP = Max. Operating Pressure)
The MOP function limits the valve’s degree of opening as long as
the evaporating temperature measured by S1 is higher than the
set MOP temperature. The function can only be active when the
Flooded evaporator
This function allows liquid flow in the evaporator, but only when a signal
is received. If the signal disappears, then the regulation switches over to
“adaptive superheat”.
AKV injection valve function is ON.
Start/stop of injection
The injection can be stopped separately for each evaporator section.
There is a common defrost start for all evaporator sections. Defrost
stop can be common or individual when based on temperature.
Refrigeration will not be re-started until defrost has been accomplished in all sections.
Fan control during defrost
Choose whether the fans should be running or stopped during the
defrost sequence.
Coordinated defrost
If there are several controllers that are to perform defrost at the
same time they can be grouped from the system unit. The system
unit will start the defrosts, and when the defrost of the individual
controllers is later finished they will go into ”stand-by” position
until all the defrosts have been terminated. Refrigeration is then
resumed.
Drip tray heating element
It is possible to control a heating element in the drip tray for hot
gas defrost. When defrost is commenced, the heating element is
activated. The heating element remains activated until a set time
after defrost has ended by time or temperature.
Defrost type
Hot gas defrost
During hot gas defrost, the controller regulates valves in the liquid
line, hot gas valves, a suction line valve and a drain valve.
A time delay can be set which defers opening of the hot gas valve.
Defrost start
Defrost can be started in several ways. Once started it will continue
until a ”defrost stop” signal is received.
- Manual defrost
Manual defrost can be enabled via a setting in the controller or
via the bottom button on the display.
After activation the setting moves back to position OFF when the
defrost has been completed.
Electric defrost
When there is electric defrost, the individual sections’ heating elements are controlled separately.
Natural defrost
Defrost is accomplished here by the fans circulating air through
the evaporator.
Warm brine defrost
Warm brine defrost can be used on indirect refrigeration systems
with solenoid valves. During warm brine defrost, the solenoid
valve is kept open during defrost so that the warm brine can run
through the "evaporator".
- External signal on input
Defrost start is done with a signal on a DI input. The signal must
be an impulse signal of at least three seconds’ duration. Defrost
starts when the signal moves from OFF to ON.
- Schedule – weekly programme
Defrost can be started via an internal schedule or via an external
schedule placed in the network's system unit.
• Internal schedule
Defrost is started by means of a weekly programme that is set
in the controller. The times have relation to the controller’s
clock function. Up to eight defrosts per 24 hours can be set. The
schedule can be found via the ”Overview display” / ”Defrost” /
”Schedule”.
• External schedule
Defrost is started via a signal from the network's system unit
- Interval
Defrost starts with set intervals, e.g. every eight hours. An interval must ALWAYS be set to a "higher" value than the period set
between two defrosts when a schedule or network signal is used.
Defrost according to intervals ensures that defrost always takes
place, even if no signal is received from the network's system
unit.
- Adaptive defrost
This function can cancel planned defrosts which are not necessary, and on its own initiative it can start a defrost if the evaporator is about to be blocked by rime and ice.
(The "Adaptive defrost" function is described at the end of the
section.)
Defrost sequence
Every defrost runs through the following sequence:
- waiting position (used for coordinated defrost) (state 4)
- drip-off (injection delay) (state 5)
- Pressure equalisation where the drain valve opens (hot gas
defrost only) (state 6)
- fan delay (state 7)
Emptying of evaporator (state 1)
Before the defrost heating elements are started it is possible to
carry out emptying of the evaporator. During a set time delay (hot
gas delay), the valve in the liquid line remains closed, the fans run
and the evaporator is drained of refrigerant. When the delay time
has expired it will continue to state 3.
For large evaporators there should be two S5 sensors – S5-1 and
S5-2. The defrost is stopped when both temperatures have attained the set value.
If the defrost time exceeds the set max. defrost time, the defrost
stops. This will happen even if the defrost stop temperature has
not been reached (max. defrost time will function as safeguard).
When the defrost is stopped on time, the alarm message “Max.
def. period exceeded” will appear for the section in question. If
the alarm is not acknowledged within five minutes, it will automatically be cancelled.
When there is an error in a defrost sensor, an alarm appears and
the defrost stop will then be based on time in the relevant section. Defrost stop for the remaining sections will still be based on
temperature.
Defrost (state 3)
• Electric defrost
The electric heating elements are activated here.
• Natural defrost
Here, the fans run in order to defrost the evaporator using air
circulation alone.
• Hot gas defrost
Here, the drain valve and suction line valve are closed. The hot
gas valve opens in order to feed hot gas through the evaporator.
• Warm brine defrost
Here, the solenoid valve is held open so that warm brine can be
fed through the evaporator.
Defrost stop
There are four kinds of defrost stop to choose from.
• Individual stop using temperature and with time as security
In the case of electric and hot gas defrost, one output per evaporator is used here, i.e. an individual heating element / hot gas
valve per evaporator.
• Common stop using temperature and with time as security
In the case of electric and hot gas defrost, only one output is
used for all evaporators, i.e. one output for heating element /
common hot gas valve.
Example of hot gas usage with common hot gas valve for all
evaporators
The temperatures of each evaporator are measured using a sensor. Once all the evaporator temperatures are equal to or greater
than the set temperature for defrost stop, defrosting is stopped in
all sections and the defrost sequence continues.
The selection of defrost stop sensor as well as the "safeguard"
stop on time if stop temperature can not reached is exactly as
described for individual stop.
• Stop based on time
A fixed defrost time is set here. When this time has elapsed, the
defrost will be stopped and cooling will be resumed. (When stop
on time the controllers does not check whether one or more of
the evaporators still require defrost.
Example of hot gas usage with individual stop per evaporator
The temperatures of each evaporator are measured using a sensor. When this temperature is then equal to or greater than the
set temperature for defrost stop, defrost stops in the section in
question. The defrost sequence continues only when all sections
have completed defrost.
When there is electric defrost, S5 is normally selected as defrost
sensor, but S3, S4 or S2 may also be selected (S3 is an air sensor
placed in the evaporator inlet, and S4 is an air sensor placed in
the evaporator outlet).
• Minimum defrost time
A time can be set which must pass before defrosting can be concluded. This time setting has higher priority than Max. defrost
time.
• Manual stop
Defrost in progress can be stopped manually by enabling the
"Stop defrosting" function."
If a signal on forced closing during a defrost is received, the selected setting determines whether defrosting is to be stopped.
Coordinated defrost (state 4)
Via a system unit it is possible to perform a group defrost with
other appliance controllers. The system unit will in that case start
a defrost with a start signal via the data communication. When the
first section of a controller has finished defrost, the controller starts
the “Max. hold time” function and when all sections have finished
defrost, this is recorded by the system unit. The controller will
then move into waiting position until it receives a signal to restart
refrigeration. This happens when all controllers in the group have
concluded their defrosts. If this message has not been received
within the “Max. holding time” time, the controller will resume
refrigeration under all circumstances.
Drip-off delay (state 5)
A time delay can be put in so that any drops of water may drip
off the evaporator before refrigeration is resumed. In this way it is
ensured that the evaporator as far as possible is free from water
when refrigeration is restarted.
Drain delay / pressure equalisation during hot gas defrost
(state 6)
When the drip delay is completed, it is possible to add a drain
delay in which the smaller drain valve opens up to the suction line
so that pressure equalisation takes place. Once the drain delay has
expired, the main valve in the suction line opens and cooling is
resumed.
Example
Below is an example of a defrost sequence using hot gas defrost.
The following are used in the example:
- Hot gas defrost with common hot gas valves
- Defrost using the evaporators is stopped individually using the
S5 temperature
- The fans are stopped during defrost
The defrost sequence will be as follows:
Delayed fan start (state 7)
Regardless of whether the fans are running or have stopped
during the defrost sequence, the fans can be stopped during this
delay.
Drops of water left on an evaporator after defrost should be bound
to the evaporator (primarily used in freezing rooms).
After defrost, the liquid injection is started, the evaporator is
cooled down, but the fans will be started a little later. During this
period the controllers operate the expansion valve by force, but
they constantly monitor the superheat.
The temperature at which the fans are to be started is set (measured always with the S5 sensors). The max. permissible time delay
in minutes is set.
The time delay for fan start will not commence until the time delay
for liquid injection, if applicable, has run out.
Only when all the S5 sensors register a lower temperature than the
set will the fans be started. If all S5 sensors do not register a lower
temperature than the set by the delay time has elapsed, the fans
will start. At the same time alarm is given that Maximum delay
time for fan is exceeded for the section in question. If the alarm
is not acknowledged within five minutes, it will automatically be
cancelled.
If some of the S5 sensors are defective, the signal from sensors that
remain intact will be used.
• Pump down (state 1)
The AKV (ETS) valve closes, the heating element in the drip tray is
activated and the fans run.
• Time delay before the next phase (hot gas time delay, state 2)•
Defrost (state 3)
The fans stop, the main valve and the drain valve in the suction
line are closed and the hot gas valve opens.
Defrost is terminated when the S5 sensor has reached its stop
temperature.
• Hold (state 4)
If coordinated defrost is being used, the controller will wait for
a release signal from the network's system unit before continuing with the sequence. Alternatively, the hold stops once the
maximum hold time has expired.
• Drip delay (state 5)
Cooling is delayed so that any drops of water can run off the
evaporator.
• Drain delay / pressure equalisation (state 6)
The drain valve opens so that pressure equalisation takes place
in the evaporator.
• Fan delay (state 7)
The main valve in the suction line opens and liquid injection is
resumed. The fans are delayed so that the remaining drops of
water are bound to the evaporator. The fans start when the required fan start temperature has been reached on the S5 sensor,
• Drip tray heating element
The drip tray heating element is switched off when the set delay
time has expired. This delay time is applicable from the end of
defrost (state 3).
Adaptive defrost
This function can cancel planned defrosts which are not necessary, and on its own initiative it can start a defrost if the evaporator is about to be blocked by rime and ice.
This function is based on a registration of the air flow through the
evaporator. By using the AKV (stepper) valve as mass flowmeter
for the refrigerant flow it is possible to compare the energy admission on the refrigerant side with the energy emission on the air
side. Via this comparison the air flow through the evaporator can
be determined and hence also the amount of ice/frost build-up on
the evaporator surface.
Automatic adaptation to the evaporator
When adaptive defrost is activated it will carry out an automatic
tuning in order to adapt itself to the relevant evaporator. The first
tuning takes place after the first defrost so that tuning can be carried out on an evaporator without ice/rime formation. New tuning
subsequently takes place after each defrost (but not at night with
night blinds). In a few cases it may happen that the function is not
correctly adapted to the relevant evaporator. This is usually because the automatic adjustment has been made under abnormal
operating conditions at start-up/on testing the system. This will
result in the function reporting an error state. If this happens, a
manual reset of the function should take place while briefly setting the function switch to "OFF".
Status display
For each evaporator it is possible to display the current operating
status for adaptive defrost:
0: OFF Function not activated
1: Error Reset to be carried out
2: Tuning Function carries out automatic tuning
3: OK - no ice build-up
4: Slight ice build-up
5: Medium ice build-up
6: Heavy ice build-up
Restrictions and sensor signals:
The following connections/signals must be used:
- Expansion valve type AKV/ETS/CCMT
- Temperature signal from both S3 and S4
It is essential that the S3 and S4 sensors are located in the air
flows of the evaporator inlet and evaporator outlet. The sensors
must be mounted in such a way that the effects of external heat
sources, such as fan motors, are minimised as far as possible.
- Pressure signal from condensation pressure Pc
The Pc signal can be received from a pressure transmitter which
is connected to the controller, or it may be received via data
communications from the system unit.
(Several controllers may share the same Pc signal.)
If the controller does not receive a Pc signal, it will use a constant
value for the condensation pressure.
- Adaptive defrosting cannot be used if one of the following
refrigerants are used for regulation: R23, R513B, R13B1 or userdefined.
schedule in the system unit. Other defrost start signals will always
result in defrost.
This function will only cancel defrost if all evaporator sections so
permit.
Function selection
This function can be set to operate in one of the following ways:
0. OFF:
The function is stopped. Any alarms are removed and the function is reset.
1. Monitoring only::
The function is used exclusively to monitor the formation of
ice on the evaporator – the function will not cancel planned
defrosts.
If the function detects severe ice/rime formation on an evaporator, an alarm "Appliance A – air flow reduced" is transmitted.
The alarm is removed at the start of the next defrost.
2. Skipping of defrosts by day (appliances with night blinds)
This setting is used if function is only to cancel unnecessary
defrosts by day, and if night blind is used for the appliance.
This function undertakes new tuning only when defrost takes
place during day operation.
The controller MUST be set to night state when night time cover
is set for the appliance – this may take place via a schedule in
the controller or alternatively via a signal from the system unit.
This is because there is a risk of the function detecting the
formation of rime/ice on the evaporator when night blind is set
for the appliance. (A greater reduction in air flow may occur as
a consequence of a small distance between night blinds and
products.
It is important for night time cover to be removed from the
appliance when the controller switches to day operation. If not,
there is a risk of incorrect tuning, and hence missing data for
cancelling defrosts. Correct tuning will take place only after the
next defrost.
3. Skip defrost day and night (refrigeration rooms and appliances
without night blind)
This setting is used if the function is to cancel defrosts for rooms
and appliances without night blind.
New tuning of the function takes place after each defrost.
4. Full adaptive defrost
This setting is used if the function is to start defrosts on its
own initiative. The setting can ideally be used in refrigeration/
frost rooms where the time of defrost is not as important. In
refrigeration/frost rooms, this setting can ensure major savings
as defrosts take place only when necessary. Scheduled defrosts
will always be carried out. That is to say, a basic schedule can
be input and the adaptive function will then start extra defrosts
itself where necessary..
Minimum time between defrosts
It is possible to enter a minimum time between defrosts. In this
way it can be avoided that planned defrosts according to the
weekly schedule be carried out immediately after the termination
of a adaptive defrost. The time span is from the termination of a
adaptive defrost and until a planned defrost is again allowed.
This function can only cancel planned defrosts which start from
a defrost schedule – either an internal schedule or an external
Documentation on saving
It is possible to read the number of planned defrosts and the
number of cancelled defrosts.
Alarms
• Appliance not defrosted
If this function detects ice formation shortly after defrost, the
"Appliance not defrosted" alarm is generated. This error may be
due to the evaporator not being defrosted correctly as a consequence of faults in heating elements or fans. After this alarm, the
function will not cancel defrosts.
This alarm is removed at the start of the next defrost, at which
point cancellation of defrosts will be permitted again.
• Air flow reduced
If this function detects severe ice formation on the evaporator,
the alarm "Appliance X – air flow reduced" is transmitted. This error will typically be due to severe ice formation on the evaporator, but it may also be due to reduced air flow as a consequence
of severe over stacking of goods or dropout of fans. After this
alarm, the function will not cancel defrosts.
This alarm is removed at the start of the next defrost, at which
point cancellation of defrosts will be permitted again.
• Sensor error
The controller cannot carry out a tuning calculation for use in
the adaptive defrosting.
After this alarm, the function will not cancel defrosts.
This alarm is removed at the start of the next defrost, at which
point cancellation of defrosts will be permitted again.
• Flash gas alarm
This function will monitor whether there is any flash gas at the
expansion valve. If flash gas is detected over a fairly long period,
the alarm "Appliance X – Flash gas alarm" is triggered.
This alarm is removed when flash gas disappears or at the start
of the next defrost.
• Valve
The function is suitable for application of a valve from Danfoss.
Valves from other manufacturers is not recommended.
The different alarms that can be generated by the controller can
be given a priority.
“priority” will activate the alarm relay if it has been so defined. The
alarms are entered in the alarm log and also transmitted to the
data communication if connected.
The “Log only” priority will as mentioned only be entered in the
alarm log.
SettingLogSelection Alarm relayGrid
NonHigh
HighXXXX1
MediumXXXX2
LowXXXX3
Log OnlyX
Disabled
Low - Mid-
dle
Low -
High
Sensor correction
The input signal from all connected sensors can be corrected. A
correction will only be necessary if the sensor cable is long and has
a small cross-sectional area. All displays and functions will reflect
the corrected value.
Clock function
The controller contains a clock function, that can be used together
with schedules for defrost and day/night operation.
In the event of a power failure, the time setting will be remembered for at least 12 hours
If the controller is linked up to a System Manager via the data communication, the System Manager will reset the clock.
Signals via data communication
The controller contains a number of functions that can be activated/overridden by the network’s system unit:
work
AKM dest.
Forced refrigeration
The controller will undertake refrigeration when this signal is
received. Refrigeration will continue until the signal is removed.
The function will ignore the thermostat function, but forced
cooling will be stopped if there is a low temperature alarm. (If a
setting means that forced cooling and defrosting are required at
the same time, defrosting will have the higher priority.)
Display signal
The air temperatures measured at the evaporator can be read from
a display. This display must be of display type EKA 163B or EKA
164B. The display is normally mounted on the appliance so that
the customer can see the air temperature. Up to four displays per
controller can be fitted.
Connection is effected by means of wires with plug connectors.
The display can be placed on an appliance front, for example.
When a display with operating buttons is selected, the unit can be
operated with ease by means of a menu system as well as displaying temperatures and operating situations.
Display signal
Temperature display can be selected for a product sensor, or
alternatively a weighted condition between air sensors S3 and S4.
Setting is expressed as a percentage of the S4 signal.
The display is independent of the thermostat function.
An Offset can be set for the display.
Values are displayed by means of three digits, and one setting
allows you
to decide whether the temperature is to be displayed in °C or °F.
Night operation
The day/night operation of the individual controllers can be controlled from a central weekly schedule in the system unit.
LEDs on the front
The LEDs will come on when the associated relay is activated:
2nd LED = refrigeration
3rd LED = defrost
Interruption of injection
The system unit can ensure that all appliance and room controllers
force-close their valves if all compressors in the belonging central
plant stop due to operation breakdowns and are prevented from
starting again.
4th LED = ventilator operational
The LEDs will flash when an alarm has been triggered.
In this situation, you can call up the error code on the display by
briefly pressing the top button. At the same time, any alarm relays
will be deactivated.
Light control
In appliance controllers the light can be controlled via a central
weekly schedule in the system unit.
The buttons
When you want to change a setting, the top and bottom buttons
will give a higher or a lower value depending on which button
Coordinated defrost
Several appliance controllers can be grouped in the system unit
so that they will start a defrost at the same time and subsequently
start up after defrost at the same time.
you press. Before you can change the value, you must access the
menu. This is done by holding down the top button for a couple
of seconds; this takes you into the list of parameter codes. Find the
parameter code you want to change, then press the centre button to display the parameter value. When you have changed this
Adaptive defrosting
value, save the new value by pressing the centre button again
By using the "Adaptive Defrosting" function the controller must receive a condensing pressure signal Pc. This signal must be received
from the System Manager.
Examples:
Setting a menu
1. Press the top button to display a parameter
Optimization of suction pressure
The appliance/room controllers can supply the necessary information to the system unit so that it can optimise the suction pressure
2. Press the top or bottom button and find the parameter you
want to set
4. Press the top or bottom button and set the new value
5. Press the centre button again to save the value.
Read the temperature at the defrost sensor)
• Briefly press the bottom button
Manual start or stop of defrost
• Press the bottom button for 4 seconds.
Read codes
Normally the selected temperature signal can be read from the
display, but under certain conditions the display may show other
codes in order to notify the user of various operating states.
FunctionDisplay read
Main switchWhen the "main switch" is set to OFF, the display will
DefrostDuring defrost, the display will read "-d-".
Case cleaning
PASRequirement for access code. If operation of the display
AlarmThe three LED's will flash if an alarm is triggered. The
CO2FLASHING. There is a signal from a refrigerant leak
- - - When three dashes appear, the valid temperature read-
th1/th2When the thermostat bank is changed by pressing a
AL 1Alarm from section A. 2=B. etc.
- - 1
- - 2
read "OFF"
The display will switch to normal temperature display
when the thermostat temperature is in place, but not
until after the delay period “Max. Disp. -d- delay”.
When appliance cleaning is activated, the display will
read "Fan" to indicate that the fans are running in order
to defrost the evaporator. When the second stage of appliance cleaning is activated, the display reads "OFF" in
order to indicate that the appliance can now be cleaned
as all outputs are in standby position.
is to be protected by an access code, both the definition and the access code must be set in the controllers'
authorisation menu for the local display (LOCD).
alarm code can be viewed by pressing the top button.
sensor
ing is faulty (sensor switched off or short-circuited), or
else the display has been deactivated.
button, the display will display for 10 seconds which
thermostat band is active.
Initiation, Display is connected to output A
Output B. etc.
Get off to a good start when use of display
The following procedure will start regulation as quickly as possible:
1. Open parameter r12 and stop regulation (in a new appliance not
set previously, r12 will already be set to 0, which means regulation stopped)
2. Open parameter o93 and set the configuration lock to a value of
0 (=OFF)
3. Open parameter 062 = Select a predefined use on the basis
of the electrical connections which appear at the end of the
manual. After configuration of this function, the controller will
shut down and restart.
4. Once the controller has restarted, open parameter 093 and the
configuration lock is opened = value 0.
5. If AKV (stepper) valves are used, you must also select refrigerant
via parameter o30.
6. Open parameter r12 and start regulation.
7. When there is a network: set the address for the address switch
in the controller.
8. Send this address to the system unit by activating a service pin.
Menu overview:
A display can be connected for each evaporator section. In each
display, the following settings/readings can be undertaken for the
evaporator section in question.
Parameter
name
r12Main switch:
r22Select thermostat band:
r37Setting of cut-out value for the thermostat in section
r38Setting of cut-out value for thermostat band 2
o30Setting of refrigerant (must be set if AKV / stepper
o46Case cleaning function. Set:
P81Selection of pre-set application group:
o62(P81 must be set before o62 can be set)
o93Configuration lock
u17Actual air temperature for the thermostat in section
u20Actual temperature at S2 sensor. Section A/B/C/D
0: Case cleaning not started
1: Only fan running (evaporator defrost)
2: All outputs are OFF (cleaning may be carried out)
x
1= group 1: o62 + page 98-101
2= group 2: o62 + page 102-105
x
Selection of predefined configuration.
This setting will give a choice from a series of predefined combinations, which at the same time establish
the connection points.
At the end of the manual there is an overview of the
options and connection points.
After configuration of this function, the controller will
shut down and restart.
x
You can only select a preset configuration or change
refrigerant when the configuration lock is open.
0 = Configuration open
1 = Configuration locked
When selecting a Danfoss stepper motor valve, all settings are factory set. Here, it is only necessary to select the type of valve.
If a valve from other manufacturers is used the following settings
has to be made. Get data from the valve manufacturer:
Max Operating Steps.
The number of steps that correspond to a valve position of 100%.
This value is limited to a range of 0 - 10,000 steps.
Hysteresis
The number of steps needed to correct for mechanical hysteresis
when a reduction gear is part of the valve design.
This adjustment is only applied, if an additional opening of the
valve is requested.
If this is the case the valve opens an additional amount equal to
this value, before driving the valve in the closing direction by this
same value.
This value is limited to 0 – 127 steps.
Step Rate
The desired valve drive rate in steps per second.
This value is limited to 20 – 500 steps / sec.
Holding Current
The percent of the programmed Max Phase Current that should
be applied to each phase of the stepper output when the valve is
stationary. If required, this current ensures that the valve maintains its last programmed position. This value is limited to a range
of 0 – 70% given in 10% steps.
AKS 32R info
The signal from one pressure transmitter can
be received from up to 5 controllers
Graphic display MMIGRS2
Overdrive at Valve Init
During valve initialization, the amount to overdrive the valve,
beyond the 0% position, to ensure that the valve has fully closed.
This value is limited to a range of 0 - 31%.
Phase Current
The current applied to each phase of the stepper motor during
actual valve movement. This value is limited to 7 bits and a range
of 0 – 325 mA given in 10ma steps. Verify the range against the
stepper valve controller in the actual design.
Please be aware, that this value hat to be set in a RMS value. Some
valve manufacturers are using peak current!
Soft Landing after Valve Init
At power on the valve is performing a valve Initialization i.e.
closing the valve with “Max Operating Steps” plus “Overdrive At
Valve Init “steps to generate a zero point calibration of the system
. Hereafter a “Soft landing after Valve Init” is made to minimize the
closing force on the valve seat with a few opening steps according
to setting of “Hysteresis” or min 20 steps
Failsafe Position
During failsafe mode of operation (e.g., resulting from a loss of
communications to this module), specifies the default valve position. This value is limited to a range of 0 – 100%.
A display gives access to most of the controller functions .
For access, connect the display to the controller and activate the address
on MMIGRS2. (A separate power supply does not need to be connected)
Power is supplied directly from the controller via the cable.
Setting:
1.Press both the "x" and "enter" buttons and hold in for 5 seconds. The
BIOS menu is then displayed.
2. Select the "MCX selection" line and press "enter"
3. Select the "Man selection" line and press "enter"
4. The address will be displayed. Check that it is 001, press "enter".
Data will then be collected from the controller.
Light-emitting diodes on the controller
Internal communication
between the modules:
Quick flash = error
Constantly On = error
Status of output 1-8
Slow flash = OK
Quick flash = answer from gateway
■ Power
■ Comm
■ DO1 ■ Status
■ DO2 ■ Service Tool
■ DO3 ■ LON
■ DO4 ■ I/O extension
■ DO5 ■ Alarm
■ DO6
■ DO7 ■ Display
■ DO8 ■ Service Pin
remains on for 10 mins after network
registration
Constantly ON = error
Constantly OFF = error
External communication
Communication to AK-CM 102
Flash = active alarm/not acknowledged
Constant ON = Active alarm/acknowledged
The controller offers quite a number of status displays which
are invaluable in connection with operational start-up and
optimisation.
Thermostat function
Display of S3 air admission
Display of S4 air emission
Display of weighted S3/S4 thermostat temperature
Min., Max. and Average thermostat temperature / 24 hours
Average thermostat coupling in % / 24 hours
Running time for cutin period in progress or for the last cutin
period
Alarm thermostat
Display of weighted S3/S4 alarm temperature
Min., Max. and Average alarm temperature / 24 hours
Percentage of time where the alarm temperature was outside the
limits / 24 hours
Product sensor
Display of the temperature at the product sensor
Min., Max and Average of product temperature / 24 hours
Percentage of time where the product temperature was outside
the limits / 24 hours
Injection function
AKV /ETS/CCMT opening degree in %
Average opening degree / 24 hours
Evaporating pressure
S2 gas temperature
Superheat
Superheat reference
Defrost
Actual defrost status
Degree of icing-up of evaporator
Duration of on-going or last defrost
Average duration of the last ten defrosts
Duration of cooling-down after defrost
Defrost sensor temperature
Number of planned and skipped defrosts
Compressor
Operating time last 24 hours
Total operating time
Number of couplings last 24 hours
Total number of couplings
Door contact
Door contact status
Duration of last opening
Number of openings last 24 hours
Opening time last 24 hours
Rail heat
Dew point
Actual duty cycle
Appliance cleaning
Time of last cleaning
Duration of last cleaning
Input and output status
Status display of all inputs and outputs
Manual overriding of all outputs
NB: Not all displays are available via AKM – Cf. the AKM menu
description for further details.
Regulating status
The controller goes through some regulating situations. You can
see the actual situation here.
When operating with AK-ST the text is written on the screen for
the section. When operating from AKM the operating status is a
numerical value.
The values are, as follows:
0: Refrigeration stopped from Main Switch
1: Start-up phase for the injection function
2: Adaptive regulation of the superheat
3: 4: Defrost
5: Start-up after defrost
6: Forced closing
7: Injection function failure
8: Sensor error and emergency refrigeration
9: Modulating thermostat control
10: Melting function is active
11: Open door
12: Case cleaning
13: Thermostat cutout
14: Forced refrigeration
15: Shut down
Defrost state
During and immediately after a defrost the defrost status will be:
1: Evaporator is emptied
3: Defrost
5: Evaporating pressure is lowered
6: The liquid injection is delayed
7: Fan delay
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 will 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.
Particular attention is drawn to the need for a “force closing” signal
to controllers in the event of compressor stoppage, and to the
requirement for suction line accumulators.
Your local Danfoss agent will be pleased to assist with further
advice, etc.
The controller is not built for use on plate heat exchangers.
NH3 + AKVA
Please contact Danfoss if you require help concerning the positioning of sensors, transmitters, etc.
High air temp. (A,B,C,D)The air temperature has been above the high alarm limit for longer time than set delay
Low air temp. (A,B,C,D)The air temperature has been below the low alarm limit for longer time than set delay
Frost protection, too low S4
(A,B,C,D)
High Prod. temp. (A,B,C,D)The product temperature has been above the high alarm limit for longer time than set delay
Low prod. temp. (A,B,C,D)The product temperature has been below the low alarm limit for longer time than set delay
The air off temperature (S4) is below the set frost protection limit
Pressure transmitter signal for evaporating pressure faulty
S2A temp. sensor signal faulty
S3A temp. sensor signal faulty
S4A temp. sensor signal faulty
S5-1A temp. sensor signal faulty
S5-2A temp. sensor signal faulty
Product temp. sensor signal faulty
(B,C,D)
Saux1 temp. sensor signal faulty
Saux2 temp. sensor signal faulty
Saux3 temp. sensor signal faulty
Saux4 temp. sensor signal faulty
Pressure transmitter signal for condensing pressure faulty
Paux1 pressure transmitter signal faulty
Paux2 pressure transmitter signal faulty
Paux3 pressure transmitter signal faulty
Various alarms
Standby mode
MediumControl stopped,
The control has been stopped via the setting ”Main switch” = ON or via the ex ternal Main switch input
MainSwitch=OFF
Refrigerant changed
Refrigerant leak alarmRefrigerant leakA signal is being received from a leak detector
LowRefrigerant changed
The refrigerant setting has been changed
(The alarm relay on AK-CC 750A will not be activated)
Case cleaning
Door open pre alarm
Door open alarm
Injection problem A, B, C, D
Max def period A,B,C,D
HighCase cleaning initiated
LowDoor open pre alarm
MediumDoor open alarm
MediumInjection problem (A,B,C,D)
LowMax defrost time exceeded
A case cleaning has been initiated
The door has been open for longer time than 75% of the set alarm delay
The door has been open for longer time than set alarm delay
The AKV valve can not control the superheat of the evaporator
The last defrost cycle has terminated on time instead of temperature
(A,B,C,D)
Max fan del exceeded
A,B,C,D
Max hold time A,B,C,D
Air flow alarm A,B,C,D
AD – Case A not defrosted
(B,C,D)
AD – Fault case A,B,C,D
LowMax fan del ay time exceeded
(A,B,C,D)
LowMax defrost hold time
(A,B,C,D)
LowAD - Case X - Air flow reduced
LowAD - Case X not defrosted
LowAD - Sensor error A,B,C,D
The fans have been started on time instead of temperature after a defrost
After a defrost cycle the evaporator has restarted cooling as it did not get a release signal via the defrost coordination setup in the network manager (AKA gateway)
The air flow at the evaporator is greatly reduced – either as a consequence of severe ice formation, a fan fault or
other obstruction.
The air flow is continuously reduced after defrost has been carried out
The alarm priority can not be altered on system alarms
MediumClock has not been set
MediumSystem Critical exception
MediumSystem alarm exception
MediumAlarm destination disabled
MediumAlarm route failure
HighAlarm router full
MediumDevice is restarting
MediumIO module error
LowManual override IO
Flash gas has been detected at the valve for a relatively long time
The temperature for thermostat no. x has been below the low alarm limit for longer time than set delay
The temperature for thermostat no. x has been above the high alarm limit for longer time than set delay
The pressure for pressostat no. x has been below the low alarm limit for longer time than set delay
The pressure for pressostat no. x has been above the high alarm limit for longer time than set delay
The voltage signal has been below the low alarm limit for longer time than set delay
The voltage signal has been above the high alarm limit for longer time than set delay
Alarm on general alarm input DI x
Check supply to the actual valve
Time has not been set
A unrecoverable critical system failure has occurred – exchange the controller
A minor system failure has occurred – power off controller
When this alarm is activated the alarm transmission to the alarm receiver has been deactivated.
When the alarm is cleared the alarm transmission to the alarm receiver has been activated.
Alarms can not be transmitted to alarm receiver – check communication
The internal alarm buffer has an overrun – this might occur if the controller can not send the alarms to the alarm
receiver. Check communication between controller and AKA gateway.
The controller is restarting after flash updating of the software
There is a communication fault between the controller module and the extension modules – the fault must be corrected as soon as possible
The input/ output in question has been put in manual control mode via the AK-ST 500 service tool software
The controller has a setting where you can choose between various
types of installation. If you use these settings, the controller will
suggest a series of connection points for the different functions.
These points are shown below.
Even if your installation is not 100% as described below, you can
still use the function. After use, you need only adjust the divergent
settings.
The given connection points in the controller can be changed if you
wish.
Room
Appl.
No. of
Def.
type
AKV
type
Air
sensor
Controller - (Module no. 1 point 1-19)Module 2= AK-XM 205)App.no at setting
1AirS3 + S4S2A S3A S4AFor. cl. Main s. PoAKV ALightRail heat Comp.FanAlarm23
1AirS3 + S4S2A S3A S4ABlinds For. cl. Main s. PoAKV ALightBlinds Rail heat Comp.FanAlarm69
1ElS3 + S4S2A S3A S4A S5AFor. cl. Main s. PoAKV A Def. A LightRail heat Comp.FanAlarm2425
2 evap. 1ElS3 + S4S2A S3A S4A S5-1A S5-2A S6AFor. cl. Main s. PoAKV A Def. A LightRail heat Comp.FanAlarm52
1ElS3 + S4S2A S3A S4A S5ABlinds For. cl. Main s. PoAKV A Def. A LightBlinds Rail heat Comp.FanAlarm65
CO21ElS3 + S4S2A S3A S4A S5AFor. cl. Main s. PoAKV A Def. A LightRail heat Comp.FanAlarm54
CO2
1ElS3 + S4S2A S3A S4A S5-1A S5-2A S6AFor. cl. Main s. PoAKV A Def. A LightRail heat Comp.FanAlarm59
2 evap.
1GasS3 + S4S2A S3A S4A S5AFor. cl. Main s. PoAKV A Def.DrainSuction Rail heat Comp.FanAlarm2627
1GasS3 + S4S2A S3A S4A S5AFor. cl. Main s. PoAKV A Def.DrainSuction LightComp.FanAlarm4546
1GasS3 + S4S2A S3A S4A S5AFor. cl. Main s. PoAKV ADef.BlindsRail heatComp.FanAlarmSuctionDrain
2AirS3 + S4S2A S3A S4AS2B S3B S4BFor. cl. Main s. PoAKV A AKV B LightRail heat Comp.FanAlarm28
2AirS3 + S4S2A S3A S4AS2B S3B S4B Blinds For. cl. Main s. PoAKV A AKV B LightBlinds Rail heat Comp.FanAlarm70
2ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B Def. ADef. B Rail heat Comp.FanAlarm2930
2ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B Def. ADef. B LightComp.FanAlarm4950
2 evap. 2ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV BDef. ADef. BS6AS6BS5-2AS5-2BRail heatComp.FanAlarm
2ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV BDef. ADef. BBlindsRail heatComp.FanAlarm
CO22ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B Def. ADef. B Rail heat Comp.FanAlarm55
CO22ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV BDef. ADef. BRail heatComp.FanAlarm
CO2
2ElS3 + S4S2A S3A S4A S5-1A S2B S3B S4B S5-1B For. cl. Main s. PoAKV A AKV BDef. ADef. BS6AS6BS5-2AS5-2BRail heatComp.FanAlarm
2 evap.
2GasS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B Def. ADef. BSuction Comp.FanAlarm3133
2GasS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV BDef. ADef. BRail heatComp.FanAlarmSuctionDrain
2GasS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV BDef. ADef. BBlindsRail heatComp.FanAlarmSuctionDrain
3AirS3 + S4S2A S3A S4A S2B S3B S4B S2C S3CS4CMain s. PoAKV A AKV B AKV CLightRail heat Comp.FanAlarm35
3AirS3 + S4S2A S3A S4AS2B S3B S4BFor. cl. Main s. PoAKV A AKV B AKV CRail heat Comp.FanAlarmS2CS3CS4C
3AirS3 + S4S2A S3A S4AS2B S3B S4B Blinds For. cl. Main s. PoAKV A AKV B AKV CRail heat Comp.FanAlarmS2CS3CS4C
3ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B AKV CDef. ADef. BDef. CS2CS3CS4CS5CRail heatComp.FanAlarm
3ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B AKV CDef. ADef. BDef. CS2CS3CS4CS5CBlindsRail heatComp.FanAlarm
CO23ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B AKV CDef. ADef. BDef. CS2CS3CS4CS5CRail heatComp.FanAlarm
3GasS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B AKV CDef. ADef. BDef. CS2CS3CS4CS5CRail heatComp.FanAlarmSuctionDrain
3GasS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B AKV CDef. ADef. BDef. CS2CS3CS4CS5CBlindsRail heatComp.FanAlarmSuctionDrain
4AirS3 + S4S2A S3A S4AS2B S3B S4BFor. cl. Main s. PoAKV A AKV B AKV CAKV D Rail heat Comp.FanAlarmS2CS3CS4CS2DS3DS4D
4AirS3 + S4S2A S3A S4AS2B S3B S4B Blinds For. cl. Main s. PoAKV A AKV B AKV CAKV D Rail heat Comp.FanAlarmS2CS3CS4CS2DS3DS4D
4ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B AKV CAKV D Def. ADef. BDef. CDef. DS2CS3CS4CS5CS2DS3DS4DS5DRail heatComp.FanAlarm
4ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B AKV CAKV D Def. ADef. BDef. CDef. DS2CS3CS4CS5CS2DS3DS4DS5DRail heatComp.FanAlarm
CO24ElS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B AKV CAKV D Def. ADef. BDef. CDef. DS2CS3CS4CS5CS2DS3DS4DS5DRail heatComp.FanAlarm
4GasS3 + S4S2A S3A S4A S5A S2B S3B S4B S5BFor. cl. Main s. PoAKV A AKV B AKV CAKV D Def. ADef. BDef. CDef. DS2CS3CS4CS5CS2DS3DS4DS5DRail heatComp.FanAlarmSuctionDrain
4GasS3 + S4S2A S3A S4A S5A S2B S3B S4BFor. cl. Main s. PoAKV A AKV B AKV CAKV D Def. ADef. BDef. CDef. DS2CS3CS4CS5CS2DS3DS4DS5DRail heatComp.FanAlarmSuctionDrain
type
Air
sensor
Controller - (Module no. 1 point 1-19)Module 2= AK-XM 205)App.no at setting