Danfoss AK-CC55 User manual

User Guide
Case controller for semi plug-in
Type AK-CC55 Water Loop
SW Ver. 1.2x
For refrigeration appliances and cold storage rooms.

Contents
Introduction 5
Connectivity 7
Data communication 7
AK-CC55 Water Loop 7
External display 7
Controller functionality 9
Functions 9
Temperature control 9
Temperature monitoring 10
Thermostat bands 10
Night setback of thermostat value 10
Temperature sensor types 10
Compressor and Pump control 11
Voltage signal 13
Frequency signal 14
PWM signal 14
Condenser monitoring and control 16
Appliance cleaning 18
Appliance shutdown 18
Defrost control 18
Electrical defrosting 19
Hot gas defrosting 19
Natural defrost 19
Start of defrost 19
Stop of defrost 20
Defrost sequence 20
Real-time clock 21
Coordinated defrost 21
Melt function 22
Rail heat 22
Fan 23
Light function 24
Night blind (only with custom set-up) 24
Heating function (only with custom set-up) 25
Digital inputs 25
AK-CC55 Water Loop
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Door contact 26
Display 26
Override 26
Applications 28
AK-CC55 Water Loop connections and application options 29
Wiring diagram 30
Wiring 33
Special wiring details 34
Data communication 34
External solid state relay for rail heat 34
Coordinated defrost via cable connections 34
External display AK-UI55 35
Operation 36
Operation via data communication 36
Smart phone and app via AK-UI55 Bluetooth display 36
Operation via AK-UI55 Set 36
Parameter groups when operating via display 38
Get a good start 38
AK-UI55 display menu (SW ver. 1.2x) 40
Thermostat 40
Alarm settings 40
Compressor 41
Defrost 41
Fan control 42
Defrost schedule 42
Miscellaneous 42
Control 43
DO cong and manual 44
Service 45
Operation via AK-UI55 Bluetooth 47
AK-CC55 Connect menu (SW ver. 1.2x) 48
Start / Stop 48
Conguration 48
Thermostat control 50
Alarm limits and delays 51
AK-CC55 Water Loop
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Defrost control 52
Defrost schedules 53
Compressor/Pump control 54
Condenser control 55
Fan control 56
Railheat control 56
Light/Blinds/Cleaning control 57
Display control 57
Alarm relay priorities 58
Miscellaneous 59
Advanced 59
Fault message 60
Operating status 61
Product specication 62
Technical data 62
Electrical specications 62
Sensor and measuring data 62
Input and output relay specications 62
Function data 62
Environmental conditions 63
Dimensions 63
Ordering 64
Certicates, declarations, and approvals 65
Statements for the AK-UI55 Bluetooth display 66
Online support 67
AK-CC55 Water Loop
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Introduction
Application
Refrigeration appliance control for semi plug-in cabinets with a water cooled condenser.
Advantages:
• Broad application coverage for single compressor, dual compressor, variable speed compressor and variable speed
brine pump
• Quick set-up with predened settings
• Easy conguration and service using a mobile app with Bluetooth
• Robust and precise temperature control via variable speed control of compressor or brine pump
• Oil return management ensuring a long lifetime of the variable speed compressor
• Safety monitoring of high condenser brine inlet temperature
• Option for second condenser outlet brine temperature
• Safety monitoring of compressor and/or variable speed drive
Principle
The temperature in the appliance is registered by one or two temperature sensors located in the air ow before the
evaporator (S3) or after the evaporator (S4) respectively. A setting for thermostat, alarm thermostat and display
reading determines the inuence the two sensor values should have for each individual function.
The temperature of the evaporator is registered with the S5 sensor which can be used as a defrosting sensor.
On the condenser side, an S7 sensor is to be mounted at the brine inlet temperature and optionally an S8 sensor can
be mounted at the brine outlet.
The outputs will be congured based on the selected application and for some applications some of the digital
outputs can be user dened.
Application coverage
The AK-CC55 Water Loop controller has a broad application coverage and supports the following main applications:
Figure 1: Application 1,2,5 and 6
Danfoss 84B8288
S8
S4
S5
S3
S7
Single compressor application with either on/o or variable speed control of the compressor.
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AK-CC55 Water Loop

Figure 2: Application 3 and 4
Danfoss 84B8289
S7
S3
S4
S5
S8
Dual compressor application with either sequential or cyclic on/o control of the two compressor circuits.
Figure 3: Application 7 and 8
S3
S5
S4
Danfoss 84B8298
Variable speed control of a feeding brine pump.
AK-CC55 Water Loop
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Figure 5: AK-CC55 Water Loop Figure 6: AK-CC55 Water Loop with external display.
Danfoss 84B8235
Connectivity
The diagram outlines the connectivity options presented by AK-CC55 for the design of system functionality.
Figure 4: Connectivity
Remote Display Service App
AKA 245: LON units
only and max 250
controller parameters
System Manager
Display Bus
Modbus
Modbus LON/ TCP/IP (SNMP)
Modbus LON/ TCP/IP (SNMP)
Bluetooth
AK-UI55 Bluetooth
AK-UI55 Set
AK-UI55 Info
Smart Device
(iOS or Android)
AK-CC55 Connect
AK-CC55 Single Coil UI
AK-CC55 Multi Coil
AK-CC55 Compact
KoolProg
Case Controller
Danfoss 80G8333
Data communication
The AK-CC55 Water Loop controller has built-in MODBUS data communication only.
AK-CC55 Water Loop
An application mode setting will congure inputs and outputs for the desired use. There are eight applications to
choose from.
Temperature control is performed by on/o control of a single or dual compressor, variable speed control of a
compressor or a brine pump.
AK-CC55 Water Loop is without display, and can be extended with one external display (see Figure 5 and Figure 6):
External display
There are three versions available with dierent functions:
• AK-UI55 Info: Temperature display.
• AK-UI55 Set: Temperature display with control buttons on the front.
• AK-UI55 Bluetooth: Temperature display with Bluetooth communication, for use with AK-CC55 Connect Mobile
app.
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AK-CC55 Water Loop

Figure 7: AK-UI55 Info Figure 8: AK-UI55 Set Figure 9: AK-UI55 Bluetooth
AK-CC55 Water Loop
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1.
2.
Controller functionality
Functions
• ON/OFF temperature control via a single or dual compressor
• Precise temperature control via variable speed control of compressor or brine pump
• Variable speed control via voltage (0 – 10 V), frequency or PWM signal
• Oil return management for extended lifetime of compressor
• Resonance avoidance range for eliminating mechanical noise from unit
• Safety monitoring of condenser inlet temperature and compressor safety chain
• Switch between thermostat bands via digital input
• Start of defrost via schedule, runtime, digital input, network or setting display
• Natural, electrical or simple hot gas defrost
• Stop of defrost on time and/or temperature
• Coordination of defrosting among several controllers in a line-up
• Pulsing or ECO control of fans when thermostat is satised
• Appliance cleaning function for documentation of HACCP procedure
• Rail heat control via day/night load or dew point
• Door function
• Control of night blinds
• Light control
• Heat thermostat
• High accuracy inputs:
◦to guarantee a better measuring accuracy than stated in the standard EN ISO 23953-2 without subsequent
calibration (Pt1000 ohm sensor)
• Integrated MODBUS communication
Temperature control
The temperature in the appliance is registered by one or two temperature sensors which are located in the return air
before the evaporator (S3) or after the evaporator (S4) respectively. A setting for the thermostat, night thermostat,
alarm thermostat and display reading determines how much the two sensor values should inuence each individual
function, e.g. 50% of S4 will produce an equal value from both sensors.
The actual temperature control can take place in two ways:
As an ordinary ON/OFF regulation with a dierential, or
As a modulating control where the temperature variation will not be nearly as high as in ON/OFF control.
Figure 10: Control methods
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AK-CC55 Water Loop

Temperature monitoring
Just as is possible for the thermostat, the alarm monitoring can be set with a weighting between S3 and S4 so that
you can decide how much the two sensor values should inuence the alarm monitoring. Minimum and maximum
limits can be set for alarm temperature and time delays. A longer time delay can be set for high temperature alarm.
This time delay is active for pull-down, after defrosting, appliance cleaning and start-up.
Thermostat bands
Thermostat bands can be used benecially for appliances where dierent product types are stored, which requires
dierent temperature conditions. It is possible to change between the two dierent thermostat bands via a contact
signal on a digital input. Separate thermostat and alarm limits can be set for each thermostat band.
For the defrost control, separate defrost stop temperature and max. defrost time can be set for each thermostat
band. For the compressor control it is possible to disable the second compressor in thermostat band 2 if required.
Figure 11: Thermostat band function with two dierent band settings
Night setback of thermostat value
In refrigeration appliances there may be big load dierences between the shop’s opening and closing hours,
especially if night lids/blinds are used. The thermostat reference may be raised here without it having any eect on
the product temperature.
Change-over between day and night operation can take place as follows:
• via an external switch connected to a digital input.
• via a signal from the data communication system.
Figure 12: Thermostat band function with Night setback
Temperature sensor types
For the S3, S4, S5, S7 and S8 sensors, the user can select between the following sensor types:
0 = Pt1000 (Danfoss AKS 11)
1 = PTC1000 (Danfoss EKS 111)
2 = NTC 5k (Danfoss EKS 211)
3 = NTC 10k (Danfoss EKS 221)
4 = User-dened
AK-CC55 Water Loop
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