Danfoss AK-CC55 Case-Room Controller Installation Guide

Danfoss AK-CC55 Case-Room Controller Installation Guide

Identification

Dimensions

Principle

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

Data communication

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

AKV info

(Application 5 – 9)

Coordinated defrost via cable connections

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

(L: max. 100 m)

AKS 32R info

(Application 5 – 9)

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.

Relay info

(Application 1 – 4)

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.

Technical data

Electrical specifications

Sensor and measuring data

PTC 1000 EKS111 NTC5K EKS211

NTC10K EKS221 sensor

(All 3 must be of the same type)

Temperature measuring accuracy| Pt1000: -60 – 120 °C. ±0.5 K

PTC1000: -60 – 80 °C. ±0.5 K

NTC5K: -40 – 80 °C. ±1.0 K

NTC10K: -40 – 120 °C. ±1.0 K

Pt1000 sensor specification| ±0.3 K at 0 °C

±0.005 K per degree

Pe measuring| AKS 32R Ratiometric pressure transmitter: 10 – 90%

Input and output relay specifications

Input and output relay specifications| Input/ output| Description
---|---|---
Digital input| DI1 DI2| Signal from dry contact functions Requirements to contacts: Gold plating Cable length must be max. 15 m

Use auxiliary relays when the cable is longer Open loop: 12 V (SELV)

Contact 3.5 mA

Solid state output| DO1 (for AKV coil)| 115 V / 230 V AC

Max. 0.5 A (No overload protection!) Max. 1 x 20 W AKV for 115 V AC

2 x 20 W AKV for 230 V AC

Note : 2 EC coils are not supported.

Relays| DO2 DO3 DO4| 115 V / 230 V AC

Load max.: CE. 8 (6)A UL. 8A res. 3FLA 18LRA

Load min.: 1VA

Inrush: DO2 DO3 TV-5 80A

Analogue output/ PWM| AO1| 0 / 10 V Pulse Width Modulated (PWM) max. 15 mA.

0 – 10 V variable, max. 2 mA

NOTE:

• DO2 to DO4 are 16 A relays
• Max. load must be observed
• DO2 / DO3 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

Operation with setting display

Display AK-UI 55 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

Lights up in event of:
Energy optimization Cooling Defrosting Fan operation

Up arrow / Down arrow / Arrow to left:
Navigation in the menu and setting of values.

Long press (3 seconds) will start a defrost, “-d-” is shown in the display. Ongoing defrosting can be stopped by a long press.

SET:
Long press (3 seconds) gives access to the “SEt” menu.
If the operation is locked with a password, “PS” is shown. Enter the code.

Shows the setting for a chosen parameter / saves a changed setting.
Short press gives access to entering of the thermostat’s cut-out limit.

The display can give the following messages:

• -d- Defrost is in progress
• Err The temperature cannot be displayed due to a sensor error
• Err1 The display cannot load data from the controller. Disconnect and then reconnect the display
• Err2 Lost display communication
• ALA 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
• Loc The menu operation is locked. Unlock by pressing (for 3 seconds) on the ‘up arrow’ and ‘down arrow’ simultaneously
• UnL The menu operation is unlocked
• – – – The parameter has reached min. or max. limit
• PS A password is required for access to the menu
• Fan Appliance cleaning has been initiated. The fans are running
• OFF Appliance cleaning is activated and the appliance can now be cleaned
• OFF The main switch is set to Off
• SEr The main switch is set to service / manual operation
• CO2 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

Output status
When you want info on a relay output, the dot will show whether the relay is activated (energized) for e.g.:
do4 = not activated
do.4 = activated

*)
The output’s function.
(Determined at configuration).
The DOs and AOs can also be forced controlled from this menu, when r12
Main switch has been set in position “service”.
Forced control of a function can also be performed in codes q11 to q27.

**)
The input’s function.
(Determined at configuration).

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 (only application 5-9)
13. Set the pressure transmitter min. and max. range via parameter o20 and o21 (only application 5-9)
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

Food type

Setting of presettings (r89). After setting 1-5, setting is returned to 0.
Food type =| 1
Vege- tables| 2
Milk| 3
Meat/ fish| 4
Frozen food| 5
Ice cream
---|---|---|---|---|---
Temperature (r00)| 8 °C| 0 °C| -2 °C| -20 °C| -24 °C
Max. temp. setting (r02)| 10 °C| 4 °C| 2 °C| -16 °C| -20 °C
Min. temp. setting (r03)| 4 °C| -4 °C| -6 °C| -24 °C| -28 °C
Upper alarm limit (A13)| 14 °C| 8 °C| 8 °C| -15 °C| -15 °C
Lower alarm limit (A14)| 0 °C| -5 °C| -5 °C| -30 °C| -30 °C
Upper alarm limit for S6 (A22)| 14 °C| 8 °C| 8 °C| -15 °C| -15 °C
Lower alarm limit for S6 (A23)| 0 °C| -5 °C| -5 °C| -30 °C| -30 °C
Can only be set when r12=0.
Fault message

In an error situation the alarm LED on the front will be on and the alarm relay will be activated (depending on priority). If you push the alarm button for 3 seconds you can see the alarm report in the display.
(Alarm priorities can be changed. See the User Guide.) Here are the messages that may appear:
Code| Alarm text| Description
E01| Hardware failure| The controller has a hardware failure
E06| Clock lost time| Clock has lost valid time
E20| Pe Evap. pressure A – Sensor error| Sensor signal is out of range. Please check the sensor for correct operation
E24| S2 Gas outlet A – Sensor error| Sensor signal is out of range. Please check the sensor for correct operation
E25| S3 Air ON evap. A – Sensor error| Sensor signal is out of range. Please check the sensor for correct operation
E26| S4 Air OFF evap. A – Sensor error| Sensor signal is out of range. Please check the sensor for correct operation
E27| S5 Evaporator A – Sensor error| Sensor signal is out of range. Please check the sensor for correct operation
A01| High temperature alarm A| The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.
A02| Low temperature alarm A| The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.
A04| Door open alarm| The door has been open for a too long time
A05| Max defrost hold time exceeded| The controller has been waiting longer time than permitted after a co-ordinated defrost.
A11| Refrigerant not selected| The refrigerant has not been selected hence control can not be initiated
A15| DI alarm 1| Alarm signal from digital input signal
A16| DI alarm 2| Alarm signal from digital input signal
A45| Main switch set OFF| The controller manin switch has been set to either Stop or Manaual control. Alternatively a digital input set up for “main switch” function, has stopped control
A59| Case in cleaning mode| A case cleaning operation has been started on a case
AA2| CO2 leak detected| CO2 is leaking from the refrigerantion system
AA3| Refrigerant leak detected| Refrigerant is leaking from the refrigeration system
a04| Wrong IO configuration| Inputs and outputs have not been configured correctly
Data communication
The importance of individual alarms can be defined with a setting. The setting must be carried out in the group “Alarm destinations”

Additional information not relevant for safe installation and use can be found on Danfoss Store:

For more detailed information, please see the respective User Guide.

Danfoss A/S
Climate Solutions • danfoss.com • +45 7488 2222

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