Danfoss AK-CC55 Single Coil Installation guide

Installation Guide

Danfoss

84B3240

113

180 60

84B3241

Case/room controller (EEV)

084R8053

Type AK-CC55 Single Coil

Identification

084B4082

084B4083

Principle

AN294432763974en-000501

Dimensions

Danfoss

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AN294432763974en-000501 | 1

Danfoss

84B3247

84B3248

84B3249

84B8271

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.

1.

P

132

0 – 10 V/

PWM

40

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

s

5V

115 – 230 V AC

LN
1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

2.

S2 S3 S4 S5 S6 DI1/

Pe

AKVAlarm Comp.DefrostLight Fan

P

DI2AO1

AI7

B-A

MODBUS

85

+

115 – 230 V AC

1

DI3

Danfoss

132

0 – 10 V/

PWM

40

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

s

5V

115 – 230 V AC

LN
1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

S2 S3 S4 S5 S6 DI2AO1

Pe

AKVRailheatComp.DefrostLight Fan

DI1/
AI7

B-A

MODBUS

85

+

115 – 230 V AC

2

DI3

3.

P

132

40

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

s

5V

115 – 230 V AC

LN
1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

S2 S3 S4 S5 S6 DI2AO1

Pe

2 | AN294432763974en-000501

0 – 10 V/

PWM

DI1/
AI7

AKVAlarm Comp.DefrostRailheatFan

B-A

MODBUS

Danfoss

3

85

+

DI3

115 – 230 V AC

Danfoss

© Danfoss | Climate Solutions | 2021.12

4.

P

132

0 – 10 V/

PWM

40

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

s

5V

S2 S3 S4 S5 S6 DI2AO1

Pe

DI1/
AI7

B-A
MODBUS

85

+

4

115 – 230 V AC

LN

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

5.

P

AKVAlarm RailheatDefrostLight Fan

DI3

115 – 230 V AC

Danfoss

84B3250

132

0 – 10 V/

PWM

40

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

s

5V

115 – 230 V AC

LN

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

S2 S3 S4 S5 S6 DI2AO1

Pe

AKV Suction Drain HG LightFan

DI1/
AI7

B-A
MODBUS

85

+

115 – 230 V AC

5

DI3

Danfoss

84B3251

6.

P

132

0 – 10 V/

PWM

40

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

s

5V

115 – 230 V AC

LN

1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

S2 S3 S4 S5 S3B DI2AO1

Pe

AKVAlarm RailheatDefrostLight Fan

DI1/
AI7

B-A
MODBUS

85

+

115 – 230 V AC

6

DI3

Danfoss

84B3252

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AN294432763974en-000501 | 3

84B3253

U

84B3254

.

84B3266

P

132

0 – 10 V/

PWM

40

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

s

5V

S2 S3 S4 S5 S3B S5B DI2AO1

Pe

B-A

MODBUS

85

+

7

115 – 230 V AC

LN
1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

8.

P

132

40

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

s

5V

Pe

115 – 230 V AC

LN
1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

AKVAlarm Defrost BDefrost ALight Fa n

AB

RH

010

S2 S3 S4 S5 S6 DI2AO1

AKVAlarm Humidity DefrostLight Fan

DI1/
AI7

0 – 10 V/

PWM

B-A

MODBUS

85

+

DI3

115 – 230 V AC

DI3

115 – 230 V AC

Danfoss

8

Danfoss

9.

P

132

40

41 42 43 44 45 46 47 48 49 50 51 52 53 54 60 61 70 71 83 84

s

5V

115 – 230 V AC

LN
1 2 3 7 8 9 10 11 12 13 14 21 22 30 3115 16 17 18 19 20

S2 S3 S4 S5 S6 DI2AO1

Pe

4 | AN294432763974en-000501

DI1/
AI7

AKV DO2 DO3 DO4

0 – 10 V/

PWM

Custom set-up

DO5 DO6

B-A

MODBUS

9

85

+

DI3

115 – 230 V AC

Danfoss

© Danfoss | Climate Solutions | 2021.12

Data communication Important

AKS 32R

AKV info

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

AKS 32R info

Coordinated defrost via
cable connections

230 V AC (115 AC)

out

Black

Brown

Blue

230 V or 115 V
AC coil
Max. 0.5 A

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.

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.

External display
AK-UI55

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Danfoss

84B8239

Refrigeration is resumed at the same time when
all controllers have terminated defrost.

Display
084B4075 / 084B4076 / 084B4077

Cable 3 m: 084B4078
Cable 6 m: 084B4079

(L: Max. 100 m)

AN294432763974en-000501 | 5

Technical data

Electrical specifications Function data

Electrical data Value

Supply voltage AC [V] 115 V / 230 V, 50/60 Hz
Power consumption [VA] 5 VA
Power ON indicator Green LED
Electrical cable dimensioning [mm] Max. 1.5 mm multi-core cable

Sensor and measuring data

Sensor and measuring data Value

Sensor S2, S6 Pt 1000 AKS11
Sensor S3, S4, S5 Pt 1000 AKS11

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

Function data Value

Display LED 3 digit
External display, AK-CC55 Single Coil UI 1 external display
External display, AK-CC55 Single Coil 2 external displays
External display connection RJ12
Max. display cable length [m] 100 m
Data communication built-in MODBUS
Data communication option AK-OB55 Lon RS485 module

Clock battery backup power reserve 4 days
Mounting DIN rail

Environmental conditions

Environmental conditions Value

Ambient temperature range, operating [°C] 0 – 55 °C
Ambient temperature range, transport [°C] -40 – 70 °C
Enclosure rating IP IP20
Relative humidity range [%] 20 – 80%, non-condensing
Shocks/Vibrations No shocks and vibrations

(Not AK-CC55 Compact)

allowed

Input and output relay specifications

Input and
output relay
specifications

Digital input DI1

Digital input DI3 115 V / 230 V AC
Solid state

output

Relays DO2

Analogue
output/ PWM

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.

Input/
output

DI2

DO1 (for
AKV coil)

DO3
DO4
DO5
DO6

AO1 0 / 10 V Pulse Width Modulated

Description

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

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.

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

(PWM) max. 15 mA.
0 – 10 V variable, max. 2 mA

6 | AN294432763974en-000501

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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

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

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.

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)

AK-CC 550A

C NC NO

AK-CC55

C NO NC

• 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.

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AN294432763974en-000501 | 7

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.

Lights in event of alarm — press on alarm button — alarm relay is reset — alarm code displayed — e.g. “A1”

Alarm codes are shown on page 18.

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

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 configuration is locked. Unlock by pressing (for 3 seconds) on the ‘up arrow’ and ‘down arrow’ simultaneously
UnL The configuration 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
CO Flashes: Will display in event of a refrigerant leakage alarm, but only if the refrigerant is set up for CO

Long press (3 seconds) gives access to the

information menu “InF”.

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.

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".

8 | AN294432763974en-000501

© Danfoss | Climate Solutions | 2021.12

Parameter grouping at display operation

84B8272

SET button,

(Return)

Danf

84B8279

(Return)

SET

Set

cFg

<

SET

(PS)

<

r-- o03

A-- r89

c-- r00

d--

n--

F--

t--

h--

o--

p--

q--

u--

<

(Return)

Menu groups

See also the following pages.

3 s: Configuration settings

PS: Password (if any)

Main switch

r12

Application

o61

MODBUS address

Food type

Cut-out temperature

Ther. sensor S4 %

r15

Ther. sensor S4% night

r61

Alarm sensor S4%

A36

Display air S4%

o17

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

<

<

Inf

StA SET

App SET

in SET

out SET

buS SET do2

SoFSET do3

< do4

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.

Danfoss

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

Info button,
3 s: Information for service use

See control state message

See selected application

MODBUS quality

See SW version

(Return)

di1/
AI7

do1 Akv di2 **

do5

do6

Ao1

*

*

*

*

*

*

di3 **

AI1 PE

AI2 S2

AI3 S3

AI4 S4

Read output status

AI5 S5

AI6 **

<

(Return)

**

Read input status

oss

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 =

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

1

Vege­tables2Milk

3

Meat/

fish

4

Frozen

food

5

Ice

cream

© Danfoss | Climate Solutions | 2021.12

AN294432763974en-000501 | 9

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:

Alarm text

Code

Hardware failure

E01

Clock lost time

E06

Pe Evap. pressure A - Sensor error

E20

S2 Gas outlet A - Sensor error

E24

S3 Air ON evap. A - Sensor error

E25

S4 Air OFF evap. A - Sensor error

E26

S5 Evaporator A - Sensor error

E27

S6 product temp. A - Sensor error

E28

S3 Air ON evap. B - Sensor error

E34

S5 Evaporator B - Sensor error

E37

Humidity sensor - Sensor error

E59

High temperature alarm A

A01

Low temperature alarm A

A02

Door open alarm

A04

Max defrost hold time exceeded

A05

Refrigerant not selected

A11

S6 high product temperature A

A13

S6 low product temperature A

A14

DI alarm 1

A15

DI alarm 2

A16

Main switch set OFF

A45

Case in cleaning mode

A59

High temperature alarm B

A70

Low temperature alarm B

A71

CO2 leak detected

AA2

Refrigerant leak detected

AA3

High humidity alarm

a02

Low humidity alarm

a03

Wrong IO configuration

a04

Evaporator is icing up

X02

Flash gas detected

X03

Max defrost time exceeded A

Z01

Fan alarm

A34

Valve driver alarm

A43

Data communication: The importance of individual alarms can be defined with a setting. The setting must be carried out in the group "Alarm destinations"

Description

The controller has a hardware failure

Clock has lost valid time

Sensor signal is out of range. Please check the sensor for correct operation

Sensor signal is out of range. Please check the sensor for correct operation

Sensor signal is out of range. Please check the sensor for correct operation

Sensor signal is out of range. Please check the sensor for correct operation

Sensor signal is out of range. Please check the sensor for correct operation

Sensor signal is out of range. Please check the sensor for correct operation

Sensor signal is out of range. Please check the sensor for correct operation

Sensor signal is out of range. Please check the sensor for correct operation

Sensor signal is out of range. Please check the sensor for correct operation

The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.

The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.

The door has been open for a too long time

The controller has been waiting longer time than permitted after a co-ordinated defrost.

The refrigerant has not been selected hence control can not be initiated

The S6 Product temperature has been above the max alarm limit for a longer time period than the set alarm delay.

The S6 Product temperature has been below the min alarm limit for a longer time period than the set alarm delay.

Alarm signal from digital input signal

Alarm signal from digital input signal

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

A case cleaning operation has been started on a case

The alarm temperature has been above the max alarm limit for a longer time period than the set alarm delay.

The alarm temperature has been below the min alarm limit for a longer time period than the set alarm delay.

CO2 is leaking from the refrigerantion system

Refrigerant is leaking from the refrigeration system

The humidity level is too high

The humidity level is too low

Inputs and outputs have not been configured correctly

The adaptive defrost function has detected heavy ice formation on evaporator.

The adaptive defrost function has detected heavy flash gas in front of injection valve

The last defrost cycle has stopped on time instead of set temperature

Alarm from digital input monitoring function

Alarm from digital input monitoring function

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.

10 | AN294432763974en-000501

© Danfoss | Climate Solutions | 2021.12