Danfoss EKE 1A User manual

User Guide
Superheat controller
Type EKE 1A, 1B, 1C, 1D
For commercial air conditioning and pvo4 refrigeration applications

1
2
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.7.1
3.7.2
3.7.3
4
4.1
4.1.1
4.1.2
4.2
4.3
5
5.1
5.1.1
5.1.2
5.1.3
5.1.4
5.2
5.3
6
6.1
6.1.1
6.1.2
6.2
6.2.1
Contents
Introduction 4
Portfolio overview 5
Installation 7
Environmental conditions: 7
Mounting 7
General Connection’s overview 7
Cabling lengths for dierent connections 13
Connecting Relay Outputs 14
Temperature Sensor Mounting 15
Power and signal sharing 16
Sharing Power Sources 16
Sharing input signal 17
Sharing pressure sensor signal 17
Applications 20
Controller Mode 20
Superheat control mode 20
Temperature control mode 20
Driver Mode 21
Typical EKE applications 22
User Interface 26
Conguration using MMI Display 26
MMIGRS2 Setup and service 27
MMIGRS2 Main screen 28
ERR31 Error Alarm on the external display - MMIGRS2 30
Service mode through MMIGRS2 30
Conguration using KoolProg Software: 31
Quick Conguration 38
Conguration 40
Driver Mode 40
Driver Mode using analog signal 40
Driver Mode using Communication Bus 40
Superheat Control Mode 41
Superheat Reference Calculation Parameters 42
Superheat controller, Type EKE 1A, 1B, 1C, 1D
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 2

6.2.2
6.2.3
6.2.4
6.3
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
7
8
8.1
8.1.1
8.1.2
8.1.3
8.1.4
8.1.5
8.1.6
8.1.7
8.1.8
8.2
9
10
11
12
Temperature Control Parameters 45
Osetting Superheat, Temperature and OD Via External signal 47
Compressor feed Forward function 49
Other features and modes 50
Startup and Defrost Modes 50
Protection features 52
Manual Mode 57
Valve conguration 58
Adding user Dened Refrigerant 60
Parameter List 61
Alarms and troubleshooting 72
Alarms 72
Conguration errors 72
Sensor alarms/errors 73
Stepper alarms/errors 74
Bus alarms/errors 74
Application alarms 75
Thermostat alarms 75
Stop state alarm 76
Manual mode alarm 76
Troubleshooting 76
Appendix 81
Ordering 82
Certicates, declarations, and approvals 83
Online support 84
Superheat controller, Type EKE 1A, 1B, 1C, 1D
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 3

1 Introduction
The exible pre-programmed EKE superheat controller from Danfoss provides ultimate software control, allowing
you to tailor the performance of your system to your exact requirements. EKE is ideal for controlling a wide range of
commercial air conditioning and refrigeration applications, such control helps you to achieve the highest eciency
in the system reducing the operational cost by up to 20% with minimal eort. EKE is generally used where there is a
requirement for accurate control of superheat or temperature control in connection with air conditioning and
refrigeration. The superheat is regulated to the lowest possible value within a short period of time. It regulates the
superheat of the evaporator by charging optimally even when there are great variations of load resulting in
reduction of energy consumption and operational cost
Typical Applications:
• Chillers
• Processing plant / Cabinet cooling
• Cold store (air coolers)
• A/C plant / Air conditioning
• Heat pumps. Residential Heat Pump
• Transport cooling
• Stepper Motor Driver
Superheat controller, Type EKE 1A, 1B, 1C, 1D
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 4

2 Portfolio overview
Table 1: Portfolio overview
Features
EKE 1A
EKE 1B
EKE 1C
EKE 1D
Power supply
Power Supply Type
24 V AC / DC ± 20%
•
•
•
•
Battery Backup input
18-24 V DC
•
•
•
•
Class of insulation
Class II
Data communication
MODBus
RS 485 RTU
•
•
Wired CANbus
• (4 wires)
• (3 wires)
CANbus RJ 12
Danfoss MMI service port
•
•
•
•
Inputs:
Number of temperature
sensors
1
2
3
2
Temperature sensor types
PT1000
•
NTC 10K, type EKS
•
•
•
•
NTC 10K, type ACCPBT
•
•
•
•
NTC 10K, type Sensata
•
•
•
•
Number of Pressure sen-
sor
1
1
2(1)
1
Pressure Transmitter
types
Ratiometric 0.5 - 4.5 V
•
•
•
•
Voltage signal 0 – 10 V
•
•
•
•
Current signal 0 – 20 mA
•
Share Pressure Signal
Hardware (Up to 5 devi-
ces)
•
•
•
Via wired CANbus (not
possible to share ratio-
metric sensor)
•
•
Via MODbus
•
•
Number of external refer-
ences
1
1
1
1
External reference
0-20mA
•
User dened current
•
0-10V
•
•
•
•
0- 5V
•
•
•
•
User dened voltage( max
10V)
•
•
•
•
Digital input Dry contact
3
2
Outputs
Digital output
1
Relay
Normally Open
3A General purpose, 250V ac, 100k
Normally closed
2A General purpose, 250V ac, 100k
Relay Function
Alarm relay or LLSV (Liquid Line Solenoid Valve)
User interfaces
Koolprog Software tool
•
•
•
•
MMIGRS2 screen
•
•
•
•
Master controller
•
•
•
(1) The 2nd pressure sensor is connect to AI4 (1) The 2nd pressure sensor is connect to AI4
* The 2nd pressure sensor is mounted on AI4
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 5
Superheat controller, Type EKE 1A, 1B, 1C, 1D

Table 2: Accessories and Related products
MMIGRS2 Display
ACCCBI Cable
MMIMYK Gateway
User interface module MMIGRS2 Display.
ACCCBI cables for MMI display and gateway.
MMIMYK device is used as a gateway to connect EKEs
and the KoolProg PC software for parameter setting
or data logging.
Table 3: Accessories and Related products
Pressure Transducer
Temperature Sensor
Power Supply
AKS Pressure Transmitter,available with ratiometric
and 4 - 20 mA. NSK Ratiometric Pressure Probe. XSK
Pressure probe 4 - 20 mA.
PT 1000 AKS is a High precision temp. sensor AKS 11
(preferred), AKS 12, AKS 21 ACCPBT PT1000 NTC sen-
sors EKS 221 (NTC-10 Kohm) ACCPBT NTC Temp probe
(IP 67 / 68)
AK-PS Input: 100 - 240 V AC / 45 - 65 Hz Output: 24 V
DC: available with 18 VA, 36 VA and 60 VA ACCTRD IIn-
put: 230 V AC, 50 – 60 Hz Output: 24 V AC, available
with 12 VA, 22 VA and 35 VA
Table 4: Accessories and Related products
Stepper motor valves
M12 Angle Cables
EKE is compatible with Danfoss stepper motor valves i.e Danfoss ETS 5M, ETS 6,
ETS, KVS, ETS Colibri®, KVS colibri®, CTR, CCMT.
Various lengths of standard M12 cable are available for connecting stepper motor
valves.
Superheat controller, Type EKE 1A, 1B, 1C, 1D
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 6

Figure 1: Mounting
1
“Click” 3
2
Figure 2: De-mounting
3 Installation
3.1 Environmental conditions:
Table 5: Environmental conditions
Operating conditions
-20 – 60 °C, 90% RH non-condensing
Storage / Transport conditions
-30 – 80 °C, 90% RH non-condensing
Vibration and shock
According to IEC 60068-2-27 Ea
Integration
In Class I and / or II appliances
Index of protection
IP40 only on the front cover (General IP20)
PCB protection
None (no conformal coating)
Period of electric stress across insulating parts
Long
Resistance to heat and re
Category D
Immunity against voltage surges
Category II
Approvals
CE compliance:
This product is designed to comply with the following EU standards:
• Low voltage guideline: 2014/35/EU
• Electromagnetic compatibility EMC: 2014/30/EU and with the following norms:
- EN61000-6-1. EN61000-6-3
(immunity and emission standard for residential. commercial and light industrial environments)
- EN61000-6-2. EN61000-6-4
(immunity and emission standard for industrial environments)
- EN60730-1 and EN60730-2-9
(Automatic electrical controls for household and similar use)
• RoHS compliance to 2011/65/EU and no components from negative list acc. to 500B0751
3.2 Mounting
DIN rail mounting / demounting. The unit can be mounted onto a 35 mm DIN rail simply by snapping it into place
and securing it with a stopper to prevent sliding. It is demounted by gently pulling the stirrup located in the base of
the housing
3.3 General Connection’s overview
This is an overview of all the dierent possible installation of the EKE 1x series, the connection details will be
explained separately in the conguration section
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 7
Superheat controller, Type EKE 1A, 1B, 1C, 1D

Figure 3: EKE 1A connection overview
–/~
+/~
GND
Bat+
A1
A2
B1
B2
NO1
C1 NC1
–/~
+/~
GND
Bat+
A1
A2
B1
B2
NO1
C1 NC1
–
+
+
V
–/~
+/~
GND Bat+
A1
A2 B1 B2
NO1 C1
NC1 –/~
+/~
GND Bat+
A1
A2 B1 B2
NO1 C1
NC1
COM
5V+ DI2
DI1 COM
AI4
AI3
AI2
DI3 COM
CAN RJ
COM
5V+ DI2
DI1 COM
AI4
AI3
AI2
DI3 COM
CAN RJ
1
2
3
C
CAN RJCAN RJ
COM
5V+
DI2 DI1 COM AI4 AI3 AI2 DI3 COM
CAN RJ
COM
5V+
DI2 DI1 COM AI4 AI3 AI2 DI3 COM
C1 NC1
Power
C1 NO1
Power
fu
Master controller Optional
Pressure Transmitter
Ratiometric 0.5 – 4.5 V AKS cable
connection
060G1034
e.g. AKS 32R
Power supply
24 V AC
± 20%
24 V DC
± 20%
2.5 A
T se
(optional)
Batt
backup
(optional)
ON/OFF
solenoid
valve
Alarm
orange
yellow
red
black
brown
black
orange
yellow
Relay
Normally open or
normally closed
(optional)
white
black
red
green
ETS 6 valve
ETS 5M
ETS / KVS
Colibri ®
CCMT / CTR valve
MMIGRS2 Display
MMIMYK
Gateway
080G0294 (optional)
CANbus
DI2
DI1 (ON/OFF)*
COM
AI4 (voltage)
NTC (S2)
DI3
CAN RJ
080G0075 (opt.)
KoolProg PC tool
Danfoss
80G311.10
18
Superheat controller
EKE 1A - 080G5300
*Note; IF Dl1(ON/Off)
switch is not used it
must be turned off in
Dl1 parameter
configuration
Table 6: EKE 1A pinout
COM
Common
DI3
Digital input 3
Software congurable DI
AI2
Analog input NTC 10K
S2
AI3
Analog inputs 0 – 5 V / Ratiometric pressure transmitter
Pe
AI4
analog inputs 0 – 10 V
External Reference signal
COM
Common
DI1
Digital input 1
Main switch (hardware)
DI2/3
Digital input 2 and 3
Software congurable DI
5V+
Power output for Ratiometric pressure transmitter 0 – 5V
COM
Common
NOTE:
• If Dl1(On/O) switch is not used it must be short circuited
• EKE 2U Backup power module is recommended to use to ensure closure of the electronic valves. in case of power
failures
Superheat controller, Type EKE 1A, 1B, 1C, 1D
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 8

Figure 4: EKE 1B connection overview
Danfoss 80G318.10
COM 5V+ DI2 DI1 COM AI4 AI3 AI2 DI3 COM
L H GND
CAN RJ
–/~ +/~ GND Bat+ A1 A2 B1 B2 NO1 C1 NC1
COM 5V+ DI2 DI1 COM AI4 AI3 AI2 AI1 COM
CAN RJ
–/~ +/~
GND Bat+ A1 A2 B1 B2
NO1 C1 NC1
–
+
+
18 V
1
2
3
COM 5V+ DI2 DI1 COM AI4 AI3 AI2 DI3 COM
L H GND
CAN RJ
–/~ +/~ GND Bat+ A1 A2 B1 B2 NO1 C1 NC1
COM 5V+ DI2 DI1 COM AI4 AI3 AI2 AI1 COM
CAN RJ
–/~ +/~ GND Bat+ A1 A2 B1 B2 NO1 C1 NC1
C1 NC1
Power
C1 NO1
Power
Superheat controller
EKE 1D - 080G5360
Master controller
Pressure transmitter
e.g. AKS 32R
Power supply
24 V AC
± 20%
24 V DC
± 20%
2.5 A
T fuse
(optional)
Batt
backup
(optional)
ON/OFF
solenoid
valve
Alarm
Relay
Normally open or
normally closed
(optional)
AKS Cable
connection
060G1034
* Note: If Dl1(On/Off) switch is not
used it must be short circuited
RS485 MODBus
RS485 RTU MODBus
Supervisor
network
EKE
MMIGRS2 Display
MMIMYK
Gateway
KoolProg
PC tool
080G0294 (optional)
CANBus
080G0075 (opt.)
DI2
DI1 (ON/OFF)*
COM
AI4 (0 / 10 V)
NTC (S2)
NTC (S3/S4)
Optional
CAN RJ
orange
yellow
red
black
brown
black
orange
yellow
white
black
red
green
ETS 6 valve
ETS 5M
ETS / KVS
Colibri ®
CCMT / CTR valve
Table 7: EKE 1B pinout
COM
Common
AI
Analog inputs NTC 10K
S3/S4 selectable via software
AI2
Analog input NTC 10K
S2
AI3
Analog inputs 0 – 5 V / Ratiometric pressure transmitter
Pe
AI4
analog inputs 0 – 10 V
External Reference signal
COM
Common
DI1
Digital input 1
Main switch (hardware)
DI2/3
Digital input 2 and 3
Software congurable DI
5V+
Power output for Ratiometric pressure transmitter 0 – 5V
COM
Common
NOTE:
• If Dl1(On/O) switch is not used it must be short circuited
• EKE 2U Backup power module is recommended to use to ensure closure of the electronic valves. in case of power
failures
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 9
Superheat controller, Type EKE 1A, 1B, 1C, 1D

Figure 5: EKE 1C - Front board connection overview
R120 CANH CANL GND RGND D+ D-
CAN RJ
COM DI2 DI1 COM
COM 5V+ DI2 DI1 COM AI4 AI3 AI2 DI3 COM
15V+ 5V+ COM AI5 AI4 AI3 AI2 AI1 COM
1
2
3
CCC
R120 CANH CANL GND RGND D+ D-
CAN RJ
COM DI2 DI1 COM
COM 5V+ DI2 DI1 COM AI4 AI3 AI2 DI3 COM
15V+ 5V+ COM AI5 AI4 AI3 AI2 AI1 COM
*
Superheat controller
*
Danfoss 80G315.10
Superheat controller
EKE 1C - 080G5400
NTC S3/S4
(optional)
Master controller
Pressure Transmitter
Ratiometric 0.5 – 4.5 V AKS cable
connection
060G1034
NTC/PT 1000 (S2)
NTC/PT 1000 (S3/S4)
(Optional)
COM
DI2
DI1 (ON/OFF)
COM
AI4 (V/I)
e.g. AKS 32R
RS485 RTU MODBus
CANBus Local network
CANBus
MMIMYK
Gateway
EKE /
master
controller
MMIGRS display
080G0294 (optional)
supervisor
network
KoolProg
PC tool
CAN RJ
080G0075 (optional)
Note: If Dl1(On/Off ) switch
is not used it must be short
circuited
Table 8: EKE 1C pinout
COM
Common
AI1
Analog inputs temperature NTC 10K / PT1000
S3/S4 selectable via software
AI2
Analog inputs temperature NTC 10K / PT1000
S2
AI3
Analog inputs voltage / current
Pe
AI4
Analog inputs voltage / current
Ext. Ref. or Pc
AI5
Analog inputs NTC temperature
S3/S4 selectable via software
COM
Common
5V+
Power outputs for Ratiometeric pressure transmitter 0 – 5V
15V+
Power output for current signal pressure transmitter
DI1
Digital input 1
Main switch (hardware)
DI2
Digital input 2
Software congurable DI
24V+
Not used in EKE 1C
AO1
Not used in EKE 1C
NOTE:
• EKE 2U Backup power module is recommended to ensure closure of the electronic valves. in case of power failures
• If Dl1(On/O) switch is not used it must be short circuited
• EKE 1A/1B/1D only support Ratiometric 0.5 to 4.5V pressure transmitter
Superheat controller, Type EKE 1A, 1B, 1C, 1D
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 10