Danfoss 084B4082 AK-CC55 Single Coil Case Controller

Identification

Dimensions

Principle

The controller is provided with labels from the factory indicating a generic application. When selecting the required application, specific labels are provided so that you can mount the relevant one.

Data communication

It is important that the installation of the data communication cable is performed correctly with sufficient distance to high voltage cables.

AKV info

AKS 32R info

The signal from one pressure transmitter can be received by up to 10 controllers. There must not be a significant pressure drop from the pressure transmitter’s position in the suction line to the individual evaporators.

Coordinated defrost via cable connections

Max. 10 The following controllers can be connected in this way: EKC 204A, AK-CC 210, AK-CC 250, AK-CC 450, AK-CC 550 and AK-CC55. Refrigeration is resumed at the same time when all controllers have terminated defrost.

External display AK-UI55

Display: 084B4075 / 084B4076 / 084B4077
Cable 3 m: 084B4078 Cable 6 m: 084B4079

Technical data

Electrical specifications

Sensor and measuring data

Input and output relay specifications

NOTE:

•  DO2 to DO6 are 16 A relays.
• Max. load must be observed.
•  DO5 / DO6 is recommended for load with high inrush current e.g. EC Fan and LED light.
•  All relays are sealed for use with flammable refrigerant like Propane R290.
• Compliance with EN 60 335-2-89: 2010 Annex BB.

Function data

Environmental conditions

Electric noise

Cables for sensors, low voltage DI inputs and data communication must be kept separate from other electric cables:

• Use separate cable trays
• Keep a distance between cables of at least 10 cm
• Long cables at the low voltage DI input should be avoided

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 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. Special reference is made to the necessity of signals to the controller when the compressor is stopped and to the need of liquid receivers before the compressors. Your local Danfoss agent will be pleased to assist with further advice, etc.

Replacing AK-CC 550A with AK-CC55

Be aware when exchanging an AK-CC 550A controller with a new AK-CC55 controller – new wiring principles!

• Pressure sensor has new connection – signal and ground are switched
• SPDT relays have a new wiring scheme – NO and NC terminals are switched (e.g. defrost heater on when it should be off)
• Modbus has new connection scheme (A,B and screen)
• New AK-UI55 displays and cables with 6 wires vs. 4 wires for EKA 16x

AK-CC55 does not support two EEC coils connected to one AKV output. Pressure transmitter can be shared between AK-CC 550 and AK-CC55. DI2 defrost coordination can be wired between AK-CC 550 and AK-CC55.

Operation with setting display

Display AK-UI55 Set
The values will be shown with three digits, and with a setting you can determine whether the temperature is to be shown in °C or in °F.

The display can give the following messages:

• Defrost is in progress
• The temperature cannot be displayed due to a sensor error
• The display cannot load data from the controller. Disconnect and then reconnect the display
• Lost display communication
• The alarm button is activated. The first alarm code is then shown
• At top position of the menu or when max. value has been reached, the three dashes are shown in the top of the display At bottom position of menu or when min. value has
• been reached, the three dashes are shown in the bottom of the display The configuration is locked. Unlock by pressing (for 3 seconds) on the ‘up arrow’ and ‘down arrow’
• simultaneously
• The configuration is unlocked
• The parameter has reached min. or max. limit
• A password is required for access to the menu
• Appliance cleaning has been initiated. The fans are running
• Appliance cleaning is activated and the appliance can now be cleaned
• The main switch is set to Off
• The main switch is set to service / manual operation
• Flashes: Will display in event of a refrigerant leakage alarm, but only if the refrigerant is set up for CO2

Factory setting

If you need to return to the factory-set values, do the following:

• Cut off the supply voltage to the controller
• Keep up “∧” and down “∨” arrow buttons depressed at the same time as you reconnect the supply voltage
• When FAc is shown in the display, select “yes”.

Parameter grouping at display operation

Get a good start

With the following procedure you can start regulation very quickly:

1. Open parameter r12 and stop the regulation (in a new and not previously set unit, r12 will already be set to 0 which means stopped regulation)
2.  Select application based on the wiring diagrams on pages 2-4
3. Open parameter o61 and set the application number
4. For network. Set the address in o03
5. Then select a set of presets from the “Food type” help table
6. Open parameter r89 and set the number for the array of presettings. The few selected settings will now be transferred to the menu
7. Set the desired cut-out temperature r00
8. Set the weighted thermostat air temperature between S4 and S3 sensor r15
9. Set the weighted thermostat air temperature between S4 and S3 during night operation r61
10. Set the weighted alarm air temperature between S4 and S3 A36
11. Set the weighted display readout between S4 and S3 o17
12. Select refrigerant via parameter o30
13. Set the pressure transmitter min. and max. range via parameter o20 and o21
14. Set the desired defrost method in d01
15.  Set the interval time between defrost starts in d03
16. Set the desired defrost sensor in d10
17. Set the maximum defrost time in d04
18. Set the defrost stop temperature in d02
19. Open parameter r12 and start the regulation
20.  Go through the parameter list and change the factory values where needed.
21. Get the controller up and running on network:
    • MODBUS: Activate scan function in system unit
    • If another data communication card is used in the controller:
      • Lon RS485: Activate the function o04
      • Ethernet: Use the MAC address

Food type

Fault message

Documents / Resources

Danfoss 084B4082 AK-CC55 Single Coil Case Controller [pdf] Installation Guide 084B4082, AK-CC55 Single Coil Case Controller, Single Coil Case Controller, Coil Case Controller, 084B4082, Case Controller

References

• User Manual