ENGINEERING
TOMORROW
Installation Guide
Case controller Type EKC 224

Identification

Application

Dimensions

Mounting

Wiring diagrams

Application	Wiring diagrams
1
2
3
4

Note: Power connectors: wire size = 0.5 – 1.5 mm 2 , max. tightening torque = 0.4 Nm Low voltage signal connectors: wire size = 0.15 – 1.5 mm 2 , max. tightening torque = 0.2 Nm 2L and 3L must be connected to the same phase.

Data communication

Installation	Wiring
The EKC 22x controller can be integrated into a Modbus network via the RS-485 adapter (EKA 206) using an interface cable (080N0327). For installation details please refer to installation guide for EKA 206 – RS485 adapter.

Technical data

Features	Description
Purpose of control	Operating temperature sensing control suitable for incorporation into commercial air-conditioning and refrigeration applications
Construction of control	Incorporated control
Power supply	084B4055 – 115 V AC / 084B4056 – 230 V AC 50/60 Hz, galvanic isolated low voltage regulated power supply
Rated power	Less than 0.7 W
Inputs	Sensor inputs, Digital inputs, Programming key Connected to SELV limited energy <15 W
Allowed sensor types	NTC 5000 Ohm at 25 °C, (Beta value=3980 at 25/100 °C – EKS 211) NTC 10000 Ohm at 25 °C, (Beta value=3435 at 25/85 °C – EKS 221) PTC 990 Ohm at 25 °C, (EKS 111) Pt1000, (AKS 11, AKS 12, AKS 21)
Accuracy	Measuring range: -40 – 105 °C (-40 – 221 °F)
	Controller accuracy: ±1 K below -35 °C, ±0.5 K between -35 – 25 °C, ±1 K above 25 °C
Type of action	1B (relay)
Output	DO1 – Relay 1: 16 A, 16 (16) A, EN 60730-1 10 FLA / 60 LRA at 230 V, UL60730-1 16 FLA / 72 LRA at 115 V, UL60730-1
	DO2 – Relay 2: 8 A, 2 FLA / 12 LRA, UL60730-1 8 A, 2 (2 A), EN60730-1
	DO3 – Relay 3: 3 A, 2 FLA / 12 LRA, UL60730-1 3 A, 2 (2 A), EN60730-1
	DO4 – Relay 4: 2 A
Display	LED display, 3 digits, decimal point and multi-function icons, °C + °F scale
Operating conditions	-10 – 55 °C (14 – 131 °F), 90% Rh
Storage conditions	-40 – 70 °C (-40 – +158 °F), 90% Rh
Protection	Front: IP65 (Gasket integrated) Rear: IP00
Environmental	Pollution degree II, non-condensing
Overvoltage category	II – 230 V supply version – (ENEC, UL recognized) III – 115 V supply version – (UL recognized)
Resistance to heat and fire	Category D (UL94-V0) Temperature for ball pressure test statement According to Annex G (EN 60730-1)
EMC category	Category I
Approvals	UL recognition (US & Canada) (UL 60730-1) CE (LVD & EMC Directive) EAC (GHOST) UKCA UA CMIM ROHS2.0 Halo approval for flammable refrigerants (R290/R600a). R290/R600a end-use applications employing in accordance with the IEC60079-15 requirements.

Display operation

The buttons on the front of the display can be operated with short and long (3s) presses.

A	Status indication: LEDs light up at ECO/Night mode, cooling, defrost and fan running.
B	Alarm indication: Alarm icon flashes in case of an alarm.
C	Short press = Navigate back Long press = Initiate pulldown cycle. Display will show “Pud” to confirm start.
D	Short press = Navigate up Long press = Switch controller ON/OFF (setting r12 Main switch in ON/OFF position)
E	Short press = Navigate down Long press = Start defrosting cycle. Display will show the code “-d-“ to confirm start.
F	Short press = Change set point Long press = Go to parameter menu

Factory resetting

The controller can be set back to factory settings by using the following procedure:

1. Power OFF controller
2. Keep up “∧” and down “∨” arrow buttons pressed while reconnecting the supply voltage
3. When the code “Fac” is shown in the display, select “yes”

Note: The OEM factory setting will either be the Danfoss factory settings or a user defined factory setting if one has been made. The user can save his setting as OEM factory setting via parameter o67.

Display codes

Display code	Description
-d-	Defrost cycle is in progress
Pod	A temperature pulldown cycle has been initiated
Err	The temperature cannot be displayed due to a sensor error
—	Shown in top of  display: The parameter value has reached max. Limit
—	Shown in bottom of  display: The parameter value has reached min. Limit
Lock	The display keyboard is locked
Null	The display keyboard has been unlocked
PS	The access code is required to enter the parameter menu
Ax/Ext	Alarm or error code flashing with normal temp. readout
OFF	Control is stopped as r12 Main switch is set OFF
On	Control is started as r12 Main switch is set ON (code shown in 3 seconds)
Face	The controller is reset to factory setting

Navigation

The parameter menu is accessed by pressing the “SET” key for 3 seconds. If an access protection code “o05” has been defined the display will ask for the access code by showing the code “PS”. Once the access code has been provided by the user, the parameter list will be accessed.

Get a good start

With the following procedure you can start regulation very quickly:

1. Press the “SET” button for 3 seconds and access the parameter menu (display will show “in”)
2. Press the down button “∨” to go to “cFg” menu (display will show “cFg”)
3. Press the right/“>” key to open the configuration menu (display will show r12)
4. Open the “r12 Main switch” parameter and stop control by setting it OFF (Press SET)
5. Open the “o61 application mode” and select the needed application mode (Press SET)
6. Open the “o06 Sensor type” and select the temperature sensor type used (n5=NTC 5 K, n10=NTC 10 K, Pct.=PTC, Pt1=Pt1000) – (Press “SET”).
7. Open the “o02 DI1 Configuration” and select the function associated to digital input 1 (Please refer to parameter list) – (Press “SET”).
8. Open the “o37 DI2 Configuration” and select the function associated to digital input 2 (Please refer to parameter list) – (Press “SET”).
9. Open the “o62 Quick setting” parameter and select the presetting that fits with the application in use (please refer to preset table below) – (Press “SET”).
10. Open the “o03 Network address” and set the Modbus address if required.
11. Navigate back to parameter “r12 Main switch” and set it in “ON” position to start control.
12. Go through the entire parameter list and change the factory settings where needed.

Selection of quick settings

Quick setting	1	2	3	4	5	6	7
	Cabinet MT Natural def. Stop on time	Cabinet MT El. def. Stop on time	Cabinet MT El. def. Stop on temp	Cabinet LT El. def. Stop on temp	Room MT El. def. Stop on time	Room MT El. def. Stop on temp	Room LT El. def. Stop on temp
r00 Cut-out	4 °C	2 °C	2 °C	-24 °C	6 °C	3 °C	-22 °C
r02 Max Cut-out	6 °C	4 °C	4 °C	-22 °C	8 °C	5 °C	-20 °C
r03 Min Cut-out	2 °C	0 °C	0 °C	-26 °C	4 °C	1 °C	-24 °C
A13 High Lim Air	10 °C	8 °C	8 °C	-15 °C	10 °C	8 °C	-15 °C
Al 4 Low Lim Air	-5 °C	-5 °C	-5 °C	-30 °C	0 °C	0 °C	-30 °C
d01 Def. Method	Natural	Electrical	Electrical	Electrical	Electrical	Electrical	Electrical
d03 Def.lnterval	6 hour	6 hour	6 hour	12 hour	8 hour	8 hour	12 hour
d10 DefStopSens.	Time	Time	S5 Sensor	55 Sensor	Time	S5 Sensor	S5 Sensor
o02 DI1 Config.					Door fct.	Door fct.	Door fct.

Programming key

Programming controller with Mass Programming Key (EKA 201)

1. Power up the controller. Make sure the controllers is connected to mains.
2. Connect the EKA 201 to the controller using the respective controller interface cable.
3. The EKA 201 will automatically start the programming process.

Parameter list

Code	Short text manual	Min.	Max.	2	Unit	R/W	EKC 224 Appl.
							1	2	3	4
CFg	Configuration
r12	Main switch (-1=service /0=OFF / 1=0N)	-1	1	0		R/W	*	*	*	*
o61¹)	Selection of application mode (1)API: Cmp/Def/Fan/Light (2)AP2: Cmp/Def/Fan/Alarm (3)AP3: Cmp/ Al/F an/Light (4)AP4: Heat/Alarm/Light	1	4			R/W	*	*	*	*
o06¹)	Sensor type selection (0) n5= NTC 5k, (1) n10 = NTC 10k, (2)Pt = Pt1003, (3) Ptc = PTC 1000	0	3	2		R/W	*	*	*	*
o02¹)	Dell configuration (0) of=not used (1) SD=status, (2) doo–door function, (3) do=door alarm, (4) SCH=main switch, (5)nigh=day/night mode, (6) rd=reference displacement (7) EAL=external alarm, (8) defy=defrost, (9) Pod =pull I down, (10) SC=condenser sensor	0	10	0		R/W	*	*	*	*
037¹)	DI2 configuration (0) of=not used (1) SD=status, (2) doo–door function, (3) do=door alarm, (4) SCH=main switch, (5) nigh=day/night mode, (6) sled=ref refence displacement (7) EAL=external alarm, (8) def.=defrost, (9) Pad=pull down	0	9	0		R/W	*	*	*	*
o62¹)	Quick presetting of primary parameters 0= Not used 1 = MT, Natural defrost, stop on time 2 = MT, El defrost, stop on time 3= MT, El defrost, stop on temp. 4 = LT, El defrost stop on temp. 5 = Room, MT, El defrost, stop on time 6= Room, MT, El defrost, stop on temp. 7= Room, LT, El defrost, stop on temp.	0	7	0		RIW	*	*	*
o03¹)	Network address	0	247	0		R/W	*	*	*	*
r–	Thermostat
r00	Temperature setpoint	r03	r02	2.0	°C	R/W	*	*	*	*
r01	Differential	0.1	20.0	2.0	K	R/W	*	*	*	*
r02	Max. limitation of setpoint setting	r03	105.0	50.0	°C	R/W	*	*	*	*
r03	Min. limitation of setpoint setting	–40.0	r02	–35.0	°C	R/W	*	*	*	*
r04	Adjustment of the display’s temperature readout	–10.0	10.0	0.0	K	R/W	*	*	*	*
r05	Temperature unit rC / °F)	0/C	1/F	0/C		R/W	*	*	*	*
r09	Correction of the signal from Sair sensor	–20.0	20.0	0.0	°C	R/W	*	*	*	*
r12	Main switch (-1=service /0=OFF / 1=0N)	-1	1	0		R/W	*	*	*	*
r13	Displacement of reference during night operation	–50.0	50.0	0.0	K	R/W	*	*		*
r40	Thermostat reference displacement	–50.0	20.0	0.0	K	R/W	*	*	*	*
r96	Pull-down duration	0	960	0	min	R/W	*	*	*
r97	Pull-down limit temperature	–40.0	105.0	0.0	°C	R/W	*	*	*
A-	Alarm settings
A03	Delay for temperature alarm (short)	0	240	30	min	R/W	*	*	*	*
Al2	Delay for temperature alarm at pulldown (long)	0	240	60	min	R/W	*	*	*	*
A13	High alarm limit	–40.0	105.0	8.0	°C	R/W	*	*	*	*
A14	Low alarm limit	–40.0	105.0	–30.0	°C	R/W	*	*	*	*
A27	Alarm delay Dll	0	240	30	min	R/W	*	*	*	*
A28	Alarm delay DI2	0	240	30	min	R/W	*	*	*	*
A37	Alarm limit for condenser temperature alarm	0.0	200.0	80.0	°C	R/W	*	*	*
A54	Limit for condenser block alarm and comp. Stop	0.0	200.0	85.0	°C	R/W	*	*	*
A72	Voltage protection enable	0/No	1/Yes	0/No		R/W	*	*	*
A73	Minimum cut-in voltage	0	270	0	Volt	R/W	*	*	*
A74	Minimum cut-out voltage	0	270	0	Volt	R/W	*	*	*
A75	Maximum cut-in voltage	0	270	270	Volt	R/W	*	*	*
d—	Defrost
d01	Defrost method (0) non =None, (1) not = Natural, (2) E1 = Electrical, (3) gas = Hot gas	0	3	2		R/W	*	*	*
d02	Defrost stop temperature	0.0	50.0	6.0	°C	R/W	*	*	*
d03	Interval between defrost starts	0	240	8	hour	R/W	*	*	*
d04	Max. defrost duration	0	480	30	min	R/W	*	*	*
d05	lime offset for start of first defrost at start-up	0	240	0	min	R/W	*	*	*
d06	Drip off time	0	60	0	min	R/W	*	*	*
d07	Delay for fan start after defrost	0	60	0	min	R/W	*	*	*
d08	Fan start temperature	-40.0	50.0	-5.0	°C	R/W	*	*	*
d09	Fan operation during defrost	0/Off	1/ On	1/On		R/W	*	*	*
d10″	Defrost sensor (0=time, 1=Saar, 2=55)	0	2	0		R/W	*	*	*
d18	Max. comp. runtime between two defrosts	0	96	0	hour	R/W	*	*	*
d19	Defrost on demand – 55 temperatures permitted variation during frost build-up. On central plant choose 20 K (=off)	0.0	20.0	20.0	K	R/W	*	*	*
d30	Defrost delay after pull-down (0 = OFF)	0	960	0	min	R/W	*	*	*
F—	Fan
F1	Fan at stop of compressor (0) FFC = Follow comp., (1) Foo = ON, (2) FPL = Fan pulsing	0	2	1		R/W	*	*	*
F4	Fan stop temperature (55)	-40.0	50.0	50.0	°C	R/W	*	*	*
F7	Fan pulsing ON cycle	0	180	2	min	R/W		*	*
F8	Fan pulsing OFF cycle	0	180	2	min	R/W	*	*	*
c—	Compressor
c01	Min. ON-time	0	30	1	min	R/W	*	*	*
c02	Min. OFF-time	0	30	2	min	R/W	*	*	*
c04	Compressor OFF delay at door open	0	900	0	sec	R/W	*	*	*
c70	Zero crossing selection	0/No	1/Yes	1/Yes		R/W	*	*	*
o—	Miscellaneous
o01	Delay of outputs at start-up	0	600	10	sec	R/W	*	*	*	*
o2″	DI1 configuration (0) of=not used (1) SD=status, (2) doo=door function, (3) do=door alarm, (4) SCH=main switch (5) nigh=day/night mode, (6) rd=reference displacement, (7) EAL=external alarm, (8) def.=clearest, (9) Pod=pull down, (10) SC=condenser sensor	0	10	0		R/W	*	*	*	*
o3″	Network address	0	247	0		R/W	*	*	*	*
5	Access code	0	999	0		R/W	*	*	*	*
006″	Sensor type selection (0) n5 = NTC 5k, (1) n10 = NTC 10k, (2)Pt = Pt1000, (3) Ptc = PTC 1000	0	3	2		R/W	*	*	*	*
o15	Display resolution (0) 0.1, (1)0.5, (2)1.0	0	2	0		R/W	*	*	*	*
o16	Max. standby lime after coordinated defrost	0	360	20	min	R/W	*	*	*
o37′.	Dl? configuration (0) of=not used (1) Sack=status, (2) doo=door function, (3) do=door alarm, (4) SCH=main switch, (5) nigh=day/night mode, (6) redo=ref Terence displacement, (7) EAL=external alarm, (8) defy=def ran, (9) Pod=pull I down	0	9	0		R/W	*	*	*	*
o38	Configuration of light function (0) on=always on, (1) Dan=day/night (2) doo=based on door action, (3) .NET = Network	0	3	1		R/W	*		*	*
o39	Light control via network (only if o38=3(.NET))	0/Off	1/ On	1/On		R/W	*		*	*
061″	Selection of application mode (1) API: Cmp/Def/Fan/Light (2) AP2: Cmp/Def/Fan/A 6 ram (3) AP3: Cmp/Al/Fan/Light (4) AP4: Heat/Alarm/Light	1	4	1		R/W	*	*	*	*
o62’s	Quick presetting of primary parameters 0= Not used 1= MT, Natural defrost, stop on time 2 = MT, El defrost, stop on time 3= MT, El defrost, stop on temp. 4= LT, El defrost stop on temp 5 = Room, MT, El defrost, stop on time 6= Room, MT, El defrost, stop on temp. 7= Room, LT, El defrost, stop on temp.	0	7	0		R/W	*	*	*
67	Replace the controllers factory settings with the present settings	0/No	1/Yes	0/No		R/W	*	*	*	*
91	Display at defrost (0) Air=Sari temperature / (1) Fret=freeze temperature/ (2) -d-r-v-d-s is displayed	0	2	2		R/W	*	*	*
P—	Polarity
P75	Invert alarm relay (1) = Invert relay action	0	1	0		R/W	*	*	*
P76	Keyboard lock enable	0/No	1/Yes	0/No		R/W	*	*	*	*
u—	Service
u00	Control state 50: Normal, 51: Wart after defrosting. 52: Min ON timer, 53: Min OFF timer, 54: Drip oft 510: r12 Main switch set OFF, 511: Thermostat cut-out 514: Defrosting, $15: Fan delay, 517: Door open, 520: Emergency cooling, 525: Manual control, 530: Pulldown cycle, 532: Power up delay, S33: Heating	0	33	0		R	*	*	*	*
u01	Sair Air temperature	-100.0	200.0	0.0	°C	R	*	*	*	*
u09	S5 Evaporator temperature	-100.0	200.0	0.0	°C	R	*	*	*	*
u10	Status of DI1 input	0/Off	1/ On	0/Off		R	*	*	*	*
u13	Night condition	0/Off	1/ On	0/Off		R	*	*	*	*
u37	Status of DI2 input	0/Off	1/ On	0/Off		R	*	*	*	*
u28	Actual thermostat reference	-100.0	200.0	0.0		R	*	*	*	*
u58	Compressor/ Liquid line solenoid valve	0/Off	1/ On	0/Off		R	*	*	*
u59	Fan relay	0/Off	1/ On	0/Off		R	*	*	*
u60	Defrost relay	0/Off	1/ On	0/Off		R	*	*
u62	Alarm relay	0/Off	1/ On	0/Off		R		*	*	*
u63	Light relay	0/Off	1/ On	0/Off		R	*		*	*
LSO	Firmware version readout					R	*	*	*	*
u82	Controller code no.					R	*	*	*	*
u84	Heat relay	0/Off	1/ On	0/Off		R				*
U09	Sc Condenser temperature	-100.0	200.0	0.0		R	*	*	*

1) Parameter can only be changed when the parameter r12 Main switch is in OFF position.

Alarm codes

In an alarm situation the display will alternate between readout of the actual air temperature and readout of the alarm codes of active alarms.

Code	Alarms	Description	Network alarm
E29	Sari sensor error	Air temperature sensor is defect or electrical connection is lost	— Sari Error
E27	Def sensor error	S5 Evaporator sensor is defect or electrical connection is lost	— S5 Error
E30	SC sensor error	SC Condenser sensor is defect or electrical connection is lost	— SC Error
A01	High temp alarm	Air temperature in cabinet is too high	— High alarm
A02	Low temp alarm	Air temperature in cabinet is too low	— Low t. Alarm
A99	High Volt alarm	Supply voltage is too high (compressor protection)	— High Voltage
AA1	Low Volt alarm	Supply voltage is too low (compressor protection)	— Low Voltage
A61	Condenser alarm	Condenser temp. too high – check air flow	— Cond Alarm
A80	Cond. block alarm	Condenser temp. too high – Manual reset of alarm required	— Cond Blocked
A04	Door alarm	Door has been open for too long	— Door alarm
A15	DI Alarm	External alarm from DI input	— DI Alarm
A45	Standby Alarm	Control has been stopped by “r12 Main switch”	— Standby mode

1) The condenser block alarm can be reset by setting r12 Main switch OFF and ON again or by powering down the controller.

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© Danfoss | Climate Solutions | 2023.05

Documents / Resources

Danfoss EKC 224 Case Controller [pdf] Installation Guide EKC 224, Case Controller, EKC 224 Case Controller, Controller

References

• User Manual