Danfoss 084B4082 AK-CC55 Single Coil Case Controller Installation Guide

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

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%
RH measuring| 0 – 10 V

Ri > 10K ohm Accuracy +/- 0,3% FS

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

Digital input| DI3| 115 V / 230 V AC
Solid state output| DO1 (for AKV coil)| 115V / 230 V AC Max. 0.5 A

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 DO5 DO6| 115 V / 230 V AC

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

Load min.: 1VA

Inrush: DO5 DO6 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 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

 | SET|
---|---|---
Set
(PS)| <
 | cFg| SET
<|
r–| Menu groups

See also the following pages.

A–
c–
d–
n–
F–
t–
h–
o–
p–
q–
u–
<|
r12| Main switch
---|---
o61| Application
o03| MODBUS address
r89| Food type
r00| Cut-out temperature
r15| Ther. sensor S4 %
r61| Ther. sensor S4% night
A36| Alarm sensor S4%
o17| Display air S4%
o30| Refrigerant type
o20| Min. transmitter range
o21| Max. transmitter range
d01| Defrost method
d03| Defrost interval
d10| Defrost sensor
d04| Max. defrost time
d02| Defrost stop temperature
<|
<| Info button,

3 s: Information for service use

---|---
Inf
StA| SET| See control state message

See selected application

App| SET
in| SET|  | di1/ AI7| | Read input status
out| SET|  | do1| Akv| Read output status|  | di2|
buS| SET| MODBUS quality

See SW version

| do2| *| di3| *
SoF| SET| do3| | AI1| PE
<|  | do4| *| AI2| S2
(Return)

Output status

When you want info on a relay

| do5| | AI3| S3
do6| | AI4| S4
Ao1| *| AI5| S5
output, the dot will show                                       (Return)

whether the relay is activated

(energized) for, e.g.:

| AI6| **
<|

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

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

Fault message

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
E28| S6 product temp. A – Sensor error| Sensor signal is out of range. Please check the sensor for correct operation
E34| S3 Air ON evap. B – Sensor error| Sensor signal is out of range. Please check the sensor for correct operation
E37| S5 Evaporator B – Sensor error| Sensor signal is out of range. Please check the sensor for correct operation
E59| Humidity sensor – 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
A13| S6 high product temperature A| The S6 Product temperature has been above the max alarm limit for a longer time period than the set alarm delay.
A14| S6 low product temperature A| The S6 Product temperature has been below the min alarm limit for a longer time period than the set alarm delay.
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
A70| High temperature alarm B| The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.
A71| Low temperature alarm B| The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.
AA2| CO2 leak detected| CO2 is leaking from the refrigerantion system
AA3| Refrigerant leak detected| Refrigerant is leaking from the refrigeration system
a02| High humidity alarm| The humidity level is too high
a03| Low humidity alarm| The humidity level is too low
a04| Wrong IO configuration| Inputs and outputs have not been configured correctly
X02| Evaporator is icing up| The adaptive defrost function has detected heavy ice formation on evaporator.
X03| Flash gas detected| The adaptive defrost function has detected heavy flash gas in front of injection valve
Z01| Max defrost time exceeded A| The last defrost cycle has stopped on time instead of set temperature
A34| Fan alarm| Alarm from digital input monitoring function
A43| Valve driver alarm| Alarm from digital input monitoring function
Data communication: The importance of individual alarms can be defined with a setting. The setting must be carried out in the group “Alarm destinations”

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