Data Sheet Superheat controller Type EKE 1A, EKE 1B, EKE 1C (sw 2.02) The flexible 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 efficiency in the system reducing the operational cost by upto 20% with minimal effort.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Table of content 1.0 1.1 1.2 1.3 1.4 Ordering Hardware comparison Product label and Identification Dimensions: EKE 1A, EKE 1B, EKE 1C EKE range 3 3 3 4 4 2.0 2.1 EKE superheat Controller Tools Accessories 5 6 3.0 3.1 3.2 3.3 Main features overview 7 Hardware 7 Software 8 Typical features used in various applications 9 4.0 4.1 4.2 4.3 Specification General specification Electrical specification Inputs / outputs 10 10 10 11 5.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 1.0 Ordering EKE controller Accessories Type Electronic controller EKE 1A Electronic controller EKE 1B Electronic controller EKE 1C Pack format Single pack Single pack Single pack Code no. 080G5300 080G5350 080G5400 MMIGRS2 Remote Display MMIMYK gateway ACCCBI telephone cable user interface connector 1.5 m Single pack Single pack Single pack 080G0294 080G0073 080G0075 *For detail codes on different available variants, check appendix 1.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Dimensions: EKE 1A, EKE 1B, EKE 1C All dimensions in mm. Weight: EKE 1C : 190 g EKE 1A / EKE 1B : 152 g 1.4 110 CAN RJ 130 1.3 70 60 Danfoss 80G8215.11 EKE 1B EKE 1C EKE range EKE 1A © Danfoss | DCS | 2019.04 DKRCC.PD.RS0.A4.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 2.0 EKE superheat Controller Tools KoolProg PC tool The KoolProg PC tool is the main tool to interact with the EKE injection controller. It connects via USB connection to the EKE service port via MMIMYK gateway. The MMIMYK can be used as USB to CAN converter to establish the point to point connection. MMIGRS2 Can be used: • For EKE 1A / EKE 1B / EKE 1C controllers as external display to change controller settings.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 2.1 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. Pressure Transducer Temperature Sensor Power Supply AKS Pressure Transmitter Available with ratiometric and 4 - 20 mA. PT 1000 AKS is a High precision temp.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 3.0 Main Feature overview 3.1 Hardware Digital inputs The number of available DI inputs differs in various model of EKE controller. This feature is especially useful for systems where the EKE is not connected to a system controller via data communication. In this case the digital inputs can be used to interact with the EKE. The available digital inputs DI can be used for the following functions: a. Injection control ON/OFF. b.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 3.2 Software Minimum Stable Superheat (MSS) The superheat control algorithm will attempt to regulate the superheat down to the lowest stable value between the minimum superheat setting, “Min SH” and the maximum superheat setting, “Max. SH” . LoadAp Superheat LoadAP is an abbreviation of “load defined reference”. LoadAP will adjust reference to be higher if load is higher. Load is indicated by the OD of valve.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C AC Air Handler Cold Room Standalone Multi evap on compress or pack Note: For acronyms and abbreviations see appendix 1 Controller Reversible Heat pump Driver Reversible Chillers (Air / Water) Detail Chiller (Cooling only) Feature Via RS485 RTU Typical features used in various applications Via Analog Signal 3.3 Hardware Features Data Comm.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 4.0 Specification 4.1 General specification Feature Description Power supply Galvanic isolation by switch mode power supply Input voltage rating (AC): 24 V AC ± 20 % (min.19.2 V AC - max. 28.8 V AC Input frequency (AC): 50 / 60 Hz Input voltage rating (DC): 24 V DC (min. 20 - max.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 4.3 Inputs / outputs I/O TYPE Analog inputs Max. 15 V input voltage. Do not connect voltage sources without current limitation (overall 80 mA) to analog inputs while unit is not powered. Open circuit HW diagnostics available for voltage input on: AI3, AI4 (EKE 1C) AI4 (EKE 1A and EKE 1B). 0–5V EKE 1C, AI3, AI4, and EKE 1A/EKE 1B, AI3. Accuracy ± 40 mV, resolution 1.2 mV. 0 – 10 V EKE 1C, AI3, AI4, and EKE 1A/EKE 1B, AI4.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C B. CAN - RJ COM 5V+ DI2 DI1 COM AI4 AI3 AI2 DI3 COM CAN RJ ANALOG / DIGITAL INPUT RS485 PWR 24V C. 2 EKE 1C connectors: Back Vbat STEPPER VALVE NC1 C1 NO1 A1 A2 B1 B2 Bat+ GND +/~ –/~ NC1 C1 DIGITAL OUTPUT DIGITAL OUTPUT Danfoss 80G8286.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 5.1 Master controller EKE 1A connection overview MMIGRS2 Display CAN RJ CANBus 080G0075 (optional) C NTC (S2) DI3 COM AKS cable connection 060G1034 1 AI4 (Voltage) DI2 Pressure transitter Radiometric 0.5 – 4.5 V DI1 (ON/OFF)* 080G0294 (optional) * Note: If Dl1(On/ Off ) switch is not used it must be turned off in Dl1 parameter configuration 3 MMIMYK Gateway 2 CAN RJ COM 5V+ DI2 DI1 COM AI4 AI3 AI2 DI3 COM e.g.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 5.2 EKE 1B connection overview Master controller MMIGRS2 Display RS485 MODBus CANBus 080G0075 (optional) cable connection 060G1034 1 NTC (S2) NTC (S3 / S4) (optional) EKE 080G0294 (optional) DI2 DI1 (ON/OFF)* COM AO2 (0 / 10 V) supervisor network RS485 RTU MODBus CAN RJ 3 MMIMYK Gateway CAN RJ COM 5V+ DI2 DI1 COM AI4 AI3 AI2 DI3 AI1 COM COM 5V+ DI2 DI1 COM AI4 AI3 AI2 DI3 AI1 COM D– D+ RGND Pressure transmitter Radiometric 0.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 5.3.1 EKE 1C - Front board connection overview 1 * Note: If Dl1(On/Off ) switch is not used it must be short circuited (COM) (DI2) (DI1 (ON/OFF*) (COM) NTC / PT1000 (S2) NTC / PT1000 (S3 / S4) (optional) AKS cable connection 060G1034 AI4 (V / I) NTC (S3 / S4) (optional) Pressure Transmitter Ratiometric 0.5 – 4.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Connection for 4 - 20 mA pressure Transmitter 1 3 EKE 1C analog input at terminal 1 - 5. For other transmitter types, check the following table. Danfoss 80G298.10 Pressure transmitter 4 - 20 mA e.g. AKS 33 Note: EKE 1A/1B only supports ratiometric 0.5 to 4.5V pressure transmitter.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Installation 6.1 General installation This section describes a typical installation in brief, for detail please refer to the EKE Installation guide Danfoss 84N403.10 Note: Always install compatible electronic sensors and expansion valve of suitable capacity as close to the evaporator as possible. Under size or over sized valve in the system may impact the performance of the system.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Temperature sensor Pressure transmitter Jumper EKE 1B/1C controllers can receive the external sensor values like Po, Pc, S2, S3 and S4 via bus communication. In some applications, the suction pressure and/or the refrigerant temperature on the evaporator outlet, is measured by a system controller. This is often the case if the suction pressure is used to trigger low temperature/pressure alarms by the systems main controller.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 6.4 Shared input signal EKE accepts shared analogue voltage signal. Ext ref signal i.e 0 -10 V can also be shared in EKE 1A and 1B 6.5 Shared DI inputs EKE controller is provided with voltage free contacts. DI terminals must not connect with external power supply. DI cannot be shared. IF DI signal requires sharing , a work-around is to provide each DI with its own relay (or optocoupler).
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Note: Never lay power cables and probe cables in the same conduits (including those in the electrical panels) 6.7.1 Cable length Separate the sensor and digital input cables as much as possible (at least 10 cm) from the power cables to the loads to avoid possible electromagnetic disturbance. Use separate cable trays. Long DI input should be avoided. Min 10-15 cm Danfoss 84B3206.10 6.7 Cabling EKE controller supports the following max.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 7.0 Stepper motor valve EKE controller can driver all stepper motor valve from Danfoss. The connection of the Danfoss stepper motor should be done as shown on the connection diagram/ table. For stepper motor valve from other manufactures, it is necessary to get the right electrical connection information from valve manufacturer as described in the following section. ETS Electric expansion valves KVS Electric regulating valves 7.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 7.2 Stepper motor valve parameters Note: Change of valve type requires that the controller is in stopped state. I067 – Valve Configuration Danfoss stepper motor valve must be selected from Valve configuration list. On selecting the valve, the controller will automatically load pre-defined default values. The user is not required to set other stepper motor parameters for a selected valve from the valve configuration list.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C I064 – Valve step mode Stepper motor can be driven with various step excitation method. The selection of the right method depends on the valve requirements as well as operating conditions of an application. The valves can be driven in full step 1/1, half step 1/2, or in microsteps (1/4, 1/8, 1/16). Danfoss recommends to use 1/8 stepping mode as this provides a good balance between torque and speed and ensures smooth operation.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 7.3 Useful Valve parameters for various application The following valve parameters can be used in various application as needed. Valve OD% (IO29 - Valve step positioning) 100 OD% Limiting max. OD% (IO66 - default 100) (IO64 - Valve step mode) Full step Valve speed IO31 Danfoss 80G346.10 Half step Valve OD during stop (IO69 - default 0) Limiting min.
8.0 Modbus communication Master D Danfoss 80G8269.01 Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 5V R Pull up EKE 1A Applicable 1B D+ 1C LT - LT Ballanced pair D- Pull down Common D R D Slave 1 R Slave 2 Details about the Modbus communication can be found in “EKD / EIM Data communication MODbus RS 485 RTU design guide”. The brief on EKE MODbus RS – 485 RTU has been explained below. EKE controller uses half duplex standard MODbus RTU protocol.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 8.3 RS485 bus function codes overview Function code (0x03) (0x06) (0x10) (0x2B) 8.4 Example: MODBus communication Note: In bus communication, only MET (SI) system can be used. Metric unit (MET): temperature, temperature offset and pressure units in MMIGRS2 display °C , K and Bar Gauge respectively Note: setpoint needs to be scale by X10 . i.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 9.0 User interface: Display MMIGRS2 EKE 1A 1B 1C Applicable MMIGRS2 is a remote interface. It’s fitted with a graphic display. The connection with each EKE controller is made through the CAN RJ or CANbus network. All the information about the user interface is loaded inside the EKE controller; that’s why there is no need of programming the MMIGRS2 interface.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 9.2 Main screen On the main screen the following data are displayed: • the main analog inputs measurements or other information • the icon indicating if unit is operating in superheat mode or temperature mode. • shows the status of the controller • the alarm or service icon. Up Escape/Cancel Right Left Enter Down Homescreen Controller name Primary readout Operating status Evap. temperature Evap.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Unit Status Note: Setup and service menu (requires Log-In Password to be assigned in commissioning menu) Key Function Description Home screen Shows the operating status. Right x1 Active Alarm Access to Active alarm list. Press UP and Down button to see complete list. Right x 2 Trend SH 25 min Shows logged Superheat graph for 25 minutes. Right x 3 Detail Status Shows detail operating status. Press UP and Down to see complete list.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 10.0 Setup wizard via MMIGRS2 display When all connections to the controller have been made, after the power is switched on, the Danfoss logo will appear for 5 seconds, then the Home screen will be displayed. To access the Wizard: press and hold enter to access the Login screen, the commissioning password is 300, scroll down the Setup and service menu and select “Setup wizard”. The Wizard workflow is: a. Language selection; b.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 11.0 User interface KoolProg Warning! For updated EKE software versions it is required to install the latest KoolProg software versions to have the full compatibility KoolProg KoolProg is a software tool that can configure the EKE Controllers in fast and easy way. The main feature of the KoolProg are listed as follows.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Note: In offline mode, upload the file to the controller, by pressing Export button. Offline mode • Create your own configuration files on your PC without having to connect a controller. • Import a parameter configuration file to your PC from a connected controller. Save the file and download it to other controllers of the same model. • Select the most frequently used parameters as your favorites.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 11.3 Service Menu Active Alarms Search Parameter Favorites Note: Active alarms, Readouts are only available in Online mode i.e service and test Parameter Group Detail Parameter info Search feature will only display the parameters relevant to your settings. Example I035, I034 min max external voltage reference only apperars if you select R102 as 'Valve driver' and I033 as 'Voltage to OD' 11.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 12.0 Configuration 12.1 Quick guide for parameter selection Note: I036 , I037 Ext ref. current available on EKE 1C only Note: Some important Parameters e.g Superheat close function, Pcontrol, valve neutral zone are enabled in a default settings. Make sure that you activate other feature/function/ alarm as per the application requirement before you start the controller.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 12.2 Before starting controller checklist When the electric wires have been connected to the controller. the following points have to be attended to before the regulation starts: Before using EKE controller, there are compulsory settings that have to be made for each individual application.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C IO Configuration Input Output configuration EKE Controller EKE 1A EKE 1B EKE 1C Parameters DI 1 Not Used Main Switch Bus -> Start /Stop Main Switch Bus -> Start /Stop Main Switch For EKE 1A O003 For EKE 1B and 1C O002 DI 2 Not Used Defrost start * Manual Preset OD Heat / Cool Not Used Defrost start * Manual Preset OD Heat / Cool Not Used Defrost start * Manual Preset OD Heat / Cool [O022 DI2 configuration] DI 3 Not Used Defrost s
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 13.0 EKE Application EKE serves 3 different main applications • Driver Mode • Controller Mode - Superheat controller - Temperature controller • Service Mode 13.1 Driver Mode A master is commanding the valve open degree to the EKE controller. The control signal can be: • Analog signal e.g.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 13.2 Controller Mode EKE is a PI controller for stepper motor valve that controls the superheat of the evaporator based on a pressure P and a temperature (S2) sensors. Danfoss 80G8222.01 EKE 1X P TT S2 EEV In superheat mode the controller will control the superheat to be stable and close to the superheat reference. This will give the optimal utilization of heat exchanger and there by maximum cooling capacity.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 14.0 Driver mode: Using Analog signal EKE Applicable 1A 1B 1C The signal can be used to drive the valve’s opening degree to a desired position. This feature is basically used in a service mode to drive the stepper motor valve to the desired level. This can be done even if the EKE controller is not activated by the MAIN SWITCH . Voltage Current Valve Opening Degree % Valve Opening Degree % - - Danfoss 80G8271.01 14.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 15 Manual Mode EKE 1A 1B 1C Applicable 15.1 Manual OD from preset parameter via DI When DI 2 /DI 3 is configured as Preset OD, the valve OD will be positioned as defined by valve OD parameter [I078 - Preset OD] . DI Configuration as Preset OD Valve OD I078 Preset OD Auto OD Danfoss 80G353.10 Auto OD DI (as Preset OD) =OFF Digital input Manual Preset via DI 15.2 Manual control of Relay 15.3 Manual control Valve 15.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C The graph explains the switching between automatic and manual mode. Auto control Manual mode ON Auto control Danfoss 80G301.10 Valve OD 15.5 Switching between Auto and manual mode Time © Danfoss | DCS | 2019.04 DKRCC.PD.RS0.A4.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 16.0 Temperature control EKE has 2 methods of controlling temperature: • ON/OFF thermostat • Modulating thermostat (MTR) The need for cooling can either be defined by the incoming media (S3) or the outgoing media (S4). 16.1 ON/OFF thermostat The temperature in the appliance is registered by one or two temperature sensors which are located in the air flow before the evaporator (S3) or after the evaporator (S4) respectively.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 16.2 Modulating thermostat (MTR) EKE Applicable 1A 1B 1C - Modulating temperature regulation maintains a more constant temperature and also equalize the load on the system so that the compressors attains better operating conditions: • • • This function is typically used on central systems or brine systems. Each of the individual evaporator sections is controlled individually using a modulating thermostat function.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Cut-in/Cut-out vs MTR Temperature MTR Cut-in / Cut-out Cut-out Cut-in 1 /2 Differential Danfoss 80G307.10 Differential TemperatureSetpoint Time Where to use: MTR is used in a system where the compressor capacity is regulated to match the load . MTR will keep continious operation, Where as ON/OFF thermostat is used in single stage compressor or multi stage compressor where the system is in cut in - cut out mode. © Danfoss | DCS | 2019.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Danfoss 80G8225.01 In superheat mode the controller will control the superheat to be stable and closer to the superheat reference. This will give the optimal utilization of heat exchanger and there by maximum cooling capacity. If superheat is too low, the flow in the expansion is decreased and superheat will be higher. Pressure (P) 17.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 17.2 MSS EKE 1A 1B 1C Applicable The controller will search for the minimum stable superheat between an upper and lower boundry. If the superheat has been stable for a period, the superheat reference is decreased. If the superheat becomes unstable. the reference is raised again. This process continues as long as the superheat is within the bounds set by the user.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 17.3 Fixed reference EKE 1A 1B 1C Applicable Fixed reference is normally uses in systems where the load and the operating condition of the unit is stable . This can also be used in systems that periodically on/off the unit in a short run time for example process chiller that maintains the outlet media temperature to a specific set point .
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 17.5 Delta temperature reference EKE 1A Applicable 1B 1C - SH reference is calculated as a ratio between the media temperature and evaporator temperature. This reference mode is only possible if media temperature (S3) sensor is available. Evaporator temperature is calculated by knowing pressure and refrigerant.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 18.0 SH or Temp Reference via External signal Superheat reference or temperature reference can be offset by external analog signal. SH reference is not allowed to offset the signal below SH min. Parameter (R006 Ext. ref offset max. ,R106 Ext. ref offset min. ) define the range of the offset, parameter (I034, I035) and (I036, I037) define the signal range of the external signal (default is 0-10 V and 4-20mA) Offset Offset R106 Ext.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 18.3 Compressor feed forward SH reference EKE 1A Applicable 1B 1C - When a compressor speed changes, system dynamics change correspondingly. An adaptive controller is preferred to meet the control performance requirement on both functionality and safety. Feed forward compressor speed implemented in EKE controllers acts as an advantageous functionality to handle such situations.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 19.1 Priority of limiters With the many number of limiters there could be conflict in which limiter is the dominant one. The priority of the limiters are as follows : 1. Superheat close (it is always important to avoid liquid back to the compressor) 2. LOP (Low operating pressure) 3. HCTP (High condensing temperature protection) 4. Min. S4 (Minimum S4 temperature) 5.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 19.2 Superheat close EKE 1A 1B 1C Applicable SH close secures that superheat is kept on or above SH close set point. This is done in order to avoid liquid getting back to the compressor. If the media inlet temperature drops or if compressor goes down in capacity the superheat may drop below the SH close setpoint. SH close is a fast control function which reduces the flow in the expansion valve to bring superheat up to SH close setpoint.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 19.4 High condensing temperature protection EKE 1A 1B - - 1C Danfoss 80G8230.01 Applicable High condensing temperature protection will make sure that the load on the condenser is reduced in case the high condensing temperature is reached. This protection prevents discharge pressure from exceeding a set maximum pressure by reducing injection valve OD.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C EKE Applicable 1A 1B 1C - This feature is also known as freeze protection. Minimum S4 limit will make sure that the temperature of leaving media out of the evaporator is kept on or above of min S4 limit. An undershoot below the Min S4 is possible, so a frost protection is still needed to secure that the compressor is stopped before the braze plate heater is destroyed by ice.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 19.6 Maximum Operating Pressure (MOP) EKE 1A 1B 1C Applicable Maximum Operating Pressure (MOP) will make sure that the evaporating pressure (P0) is kept below the MOP setpoint. During startup and pulldown it might be needed to keep the suction pressure low to avoid overload of the compressor. If MOP is active P0 is kept on the MOP setpoint. An overshoot is possible. The MOP setpoint is kept by reducing the flow in the expansion valve.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 20.0 Start up EKE 1A 1B 1C Applicable 20.1 P - Control Sometimes in one to one applications. the valve does not open sufficiently on start-up and troublesome low pressure trips happen. The following features allows the valve to open faster as well as to to reach the optimal operating conditions quickly. P-control function quickly stabilize the system's superheat by reaching optimal operating conditions in shorter period of time.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 21.0 Defrost Sequence EKE 1A 1B 1C Applicable Defrost Sequence Defrost Sequence is not initiated by the EKE, but must be initiated by the master controller. In a standalone configuration, the defrost mode is not possible It is however possible to enter a special.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 22.0 Reversible systems, dual setting of control parameters EKE 1A 1B EKE superheat controller is designed to be capable of controlling superheat for a reversible system with bi-flow injection valve (cooling / heating mode). System dynamics in these two operation modes are normally different, hence the EKE controller has been designed to handle dual setting feature i.e to set parameters individually for cooling and heating.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 23.0 Fail safe operation In the case of sensor error, the EEV controller will go into an emergency mode ( “safe mode”), where the valve opening degree is defined by desired OD scheme as described below. User can read the failure status via [U118 Operation status] SH control Failsafe mode Configuration Description SH control signal fails.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 24.0 Service Mode Service mode is designed to provide a very simple way of operating the valve for diagnoistic and service purpose. There is neither application nor protection in this mode. The user can open and close the valve using simple button presses on MMIGRS2 . Service screen Note: Service mode is only available via MMIGRS2 display.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 25.0 Alarms 25.1 Actions following an alarm When an alarm occurs, the following actions generally ensue: • the “Alarm” or “Warning” relay is activated • an icon and the alarm code is displayed on the screen On units with an LCD display, the list of active alarms appears with the relative description The alarms are reset automatically. The alarm is deactivated as soon as the alarm condition ceases.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 26.0 Label Alarm and error table Modbus PNU Bit No. Alarm Description Actions during active Trigger (how the alarm is raised) How to clear the alarm Remark CONFIGURATION ERRORS E101 1901 9 Configuration error Auto operation blocked Active when: - DI2 and DI3 have the same mapping configuration. - AI1 and AI5 have the same mapping configuration.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Label MODbus PNU Bit No.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Label MODbus PNU Bit No. Alarm Description Actions during active Trigger (how the alarm is raised) How to clear the alarm Remark STEPPER ALARMS / ERRORS E103 1901 2 No valve configured Auto operation blocked I067 valve configuration set none I067 valve configuration set a valve from the list No valve selected.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Label MODbus PNU Bit No.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C 27.0 Trouble shooting ID 1 2 Symptom Regulation does not start on using control modes i.e. MSS Suction pressure too low Possible cause / Reaction DI is not connected, if defined as ON/OFF hardware switch. Sensor / transmitter error. Alarm configuration conflict i.e. S2 sensor not defined or no refrigerant selected. Alarm: standby mode active i.e. Parameter R012 is OFF. Solution • Turn on DI switch. Pressure drop across evaporator too high.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C ID 6 Symptom High superheat Possible cause / Reaction Lack of sub-cooling. 7 Too high or too low measured superheat Wrong sensor type, refrigerant type, pressure transmitter type and/or range. 8 a. Measured Superheat is higher than reference - more than 5K for 5 - 10 min. Load condition has changed and the superheat • TN can be adjusted to 20% lower and Kp can be adjusted to be controller is too slow to adapt to the change.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C ID 12 Symptom Takes too long to settle SH at reference point Possible cause / Reaction Too low gain Kp and KpTe or long integration time Tn. At start up, the pull down time for SH or temp. is longer. Wrong selection of the valve. Wrong selection of the reference point. 13 Start up problem Low pressure cut out at start up. Unsynchronized signals. High Superheat after startup. Solution • 1.Increase Kp by factor of 1.5. • 2.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C ID Symptom Possible cause / Reaction Solution 18 Hunting or fluctuation valve position Too high gain (Kp and KpTe) or too low integration time (Tn). • 1.Decrease Kp by factor of 1.5. • 2. Increase Tn 25% of the set value. • Perform 1 and 2 in loop if needed. s2 thermal contact. • Check mounting of S2 sensor, Check the installation guide section temperature sensor mounting. Fluctuating AI signal for SH reference.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C ID Symptom Possible cause / Reaction Solution 24 Fluctuating pressure signal Change in load of the system. Faulty pressure sensor. Flash gas in the system. • Observe the change in the load of the system. • Replace faulty pressure transmitter. • Check the section flash gas. 25 Compressor thermal cut MOP is not enable, or wrongly defined. out (Mop is not working or going higher than set Change in operating condition.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Appendix Appendix 1 Acronyms and abbreviations used in this document. Full name Abbreviation Compressor Comp.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Appendix 3 Accessing the BIOS menu (LCD display only) MMIGRS2 Display setting By pressing simultaneously the ESC and ENTER keys for 5 seconds at power up. you enter into a special BIOS menu; you can go through the voices of the menu using the UP and DOWN keys. confirm your selection with the ENTER key or discard it with the ESC key.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Appendix 5 In applications with flammable refrigerants it is recommended to install a safety fuse of 2.5 Amp per Motor coil for ETS Colibri® valves in accordance to IEC 60127. Flammable application Danfoss 80G8239.10 Fuse None ATEX zone ATEX zone Appendix 6 Factory Reset © Danfoss | DCS | 2019.04 Factory reset will triggered by the parameter [B007 – Apply defaults], which will reset to ‘0’ after power up and after Factory Reset.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Appendix 7 Overdrive enable The opening degree needs to be above this value, before the overdrive will become enabled. When the overdrive is enabled the valve will overdrive once it is closed to 0%. The amount of extra steps is defined by the parameter [I072 - Overdrive] and is scaled as a percentage of the full opening.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Appendix 8 Typical EKE 1A. 1B. 1C applications with Stepper motor valve. A. Chiller cool only S4 E Danfoss R64-3032.10 Chiller (cooling only) ETS Colibri® C S3 Pe S2 EKE controller Reversible chillers (Air to water) Reversible Chiller Cooling Danfoss R64-3030.10 B. S4 E C ETS Colibri® S4 S3 S3 P P e SS2 EK EKE co controller Danfoss R64-3030.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Reversible heat pump Air to water heat pump cooling Danfoss R64-3039.10 C. E ETS Colibri® C EK EKE co controller Pe S2 Danfoss R64-3036.10 Air to water heat pump heating C ETS Colibri® E EK EKE co controller Pe S2 © Danfoss | DCS | 2019.04 DKRCC.PD.RS0.A4.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C AC air handler AC air handler E Danfoss R64-3040.10 D. ETS Colibri® S4 S3 C Pe S2 Cold room Cold room EKE controller Danfoss R64-3038.10 E. C ETS Colibri® S3 E S2 Pe In door Out door Multi evaporator F. Multi evaporator C ETS Colibri® ETS Colibri® EKE ccontroller cont E E S4 S3 S2 © Danfoss | DCS | 2019.04 S2 Danfoss R64-3037.10 EKE ccontroller ont Pe DKRCC.PD.RS0.A4.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C If the parameter is config locked it means that the value can only be changed when the main switch is OFF Default The default value of the parameter (factory setting) Par min./Par max. Parameter minimum and Parameter maximum range. Par. Scale This shows the scaling factor of the value *1) means that there is no scaling *10) means that the read value is 10 times larger than the actual value Par. scale Default Par. min. Par. max.
IO configuration Analogue Input Digital Input Digital Output Sensor configuration Temperature sensor type Pe and Pc Pressure transmitter I020 AI1 configuration 1B/1C I021 AI4 configuration 1C I022 AI5 configuration 1C I080 AI4 configuration 1A/1B O002 DI1 configuration 1B/C 3098 3099 3100 3260 3101 1 1 1 1 1 0 0 0 0 1 0 0 0 0 0 2 2 2 1 1 O022 DI2 configuration 3102 1 0 0 3 RW O037 DI3 configuration 3103 1 0 0 3 RW O013 DO1 configuration 3104 1 0 0 2 RW I040 S2 sensor configuratio
External reference signal I090 Ext ref. configuration 1A 3280 1 0 0 2 RW I089 Ext ref. configuration 1B 3278 1 0 0 6 RW O010 Ext ref. configuration 1C 3126 1 0 0 9 RW 3127 3128 3129 3130 10 10 10 10 20 4 10 0 4 0 0 0 3282 1 0 I033 Driver reference configuration 1C 3131 1 I079 AI4 lowpass bandwidth 3257 1 I037 Ext ref. current high I036 Ext ref. current low I035 Ext ref.
50 0 100 RW x 1 0 0 1 RW x 3056 3057 4002 4003 10 1 1 10 25 2 0 0 0 1 0 0 4004 10 0 3058 1 3059 % Par. min. Default Remark Locked by mainswitch x EEPROM Access 1 RW Par. max. 0 Par. scale x x x x x x x x x x x x x x x x PNU RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW Unit Par. name Group Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Control Advanced N117 SH close function N119 SH close setpoint N120 SH close Tn divide N121 SH close Kp factor N126 Min.
Alarm and Errors Display MMIGRS2 A100 Low Min S4 delay A101 Low Min S4 band A001 Upper temperature alarm A002 Lower temperature alarm A003 Temperature alarm delay A034 Battery alarm A103 MOP alarm delay A104 MOP alarm differential A105 LOP alarm delay A106 LOP alarm differential A107 Cond.temp alarm delay A113 Cond. temp.
x x 0 = Off | 1 = On 1 RW x x 0 = Off | 1 = On X003 Modbus defrost start 4045 1 0 0 1 RW x x 0 = Off | 1 = On X004 Modbus main switch 4046 1 0 0 1 RW x x 0 = Off | 1 = On -1 200 RW x x Access Par. min. Main Group Remark EEPROM 1 RW 0 Par. max. 0 0 Default 0 1 Par. scale 1 4044 PNU 4043 X002 Modbus preset OD Unit X001 Modbus Heating Par.
Remark 0 0 20 R x x x x Access 1 Default EEPROM Locked by mainswitch Par. max. Par. min. Par. scale 4005 0 = Power up | 1 = Stop | 2 = Manual | 3 = Service | 4 = Safe State | 5 = Defrosting | 6 = Valve driver | 7 = Ther. Cutout | 8 = Emer. cooling | 9 = SH ctrl err.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C User interface module MMIGRS2 Functional description MMIGRS2 is a remote interface. It’s fitted with a graphic display that allows user to use it as external display or parameter configuration tool. The connection with every unit of the EKE range is made through the CANbus network. All the information about the user interface is loaded inside the EKE controller; that’s why there is no need of programming the MMIGRS2 interface.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C User interface module MMIGRS2 Dimensions 68 88 Danfoss 80G8079.01 137 150 16 19 138 110 ± 0.5 0.1 (x4 ) 88 Danfoss 80G8079.01 .8 ± 69 76 ± 0.5 ø2 150 Technical data TECHNICAL DATA Power supply 31.7 MMIGRS2 - from the MCX through the RJ11 telephone connector - 12/30 V DC (separate power supply is recommended) - 24 V AC +10% / -15% (separate power supply is recommended) - maximum power consumption: 1.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Gateway Functional description MMIMYK is the advanced “all in one” device that performs up to three different functions: • Programming module • Gateway • Data logger It has a bright graphic display and a keyboard that enable to configure the module to run several functions. It has also a slot for MMC card (Multi Media Card) to extend the memory capacity.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Gateway MMIMYK 12 Vdc 24 Vac + R H L GND GND D+ D- CAN RS485 105 - Danfoss 80G8077.01 Functional description 72 Technical data © Danfoss | DCS | 2019.04 TECHNICAL DATA OLED DISPLAY Display Format Active visible area 31 MMIMYK Graphic OLED 128x64 dots 35x17.5 mm KEYBOARD Number of keys Keys function 4 Set by the application software MEMORY Internal MMC 2 MB Expansion slot (Multi Media Card) up to 2 GB DKRCC.PD.RS0.A4.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Accessory - Transformers ACCTRD Functional description ACCTRD are safety transformers from 230 V AC to 24 V AC protected against short circuit and fully packed into epossidic resin for DIN rail mounting.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Accessory - Transformers AK-PS Functional description AK-PC are safety transformers from 230 V AC to 24 V DC for DIN rail mounting.. Approval Compliance: • CE • UL • RoHS Technical data TECHNICAL DATA POWER SUPPLY AK-PS 150 Primary voltage Frequency AC 100 - 240 V 50/60 HZ Secondary voltage Secondary current 24 V AC 1.5 Amp. Product part numbers DESCRIPTION CODE NO. AK-PS 150, Supply volt. AC 100 - 240 V, Freq. 50/60 HZ, 24V DC, 1.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Accessory - Probe ACCPBT 080G0205 - ACCPBT, NTC TEMPERATURE PROBE, IP68 6X40, 10 KΩ @ 25°C, 1.5m CABLE 080G0206 - ACCPBT, NTC TEMPERATURE PROBE, IP68 6X40, 10 KΩ @ 25°C, 3m CABLE 080G0207 - ACCPBT, NTC TEMPERATURE PROBE, IP68 6X40, 10 KΩ @ 25°C, 6m CABLE 080G0209 - ACCPBT, PT1000 TEMPERATURE PROBE, IP68 6X40, 1.
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C Dimensions Product part numbers AKS 12 Functional description Type designation Temperature range Sensor type Sensor Element Tolerance Cable type Cable length Code number MBT 153 - 0990 - 0350 -50 to 100 °C 1 X NTC 10K ± 0.1 °C at 0 - 70 °C PVC 3.5 m 084Z2284 MBT 153 - 0550 - 2000 -50 to 100 °C 1 X NTC 10K ± 0.
Accessory - Cable ACCCBI Functional description Product part numbers The ACCCBI connecting cables can provide all different needs for connection between MCX controller and MMI user interface. DESCRIPTION ACCCBI, TELEPHONE CABLE USER INTERFACE CONNECTOR, 1.5m CABLE ACCCBI, TELEPHONE CABLE USER INTERFACE CONNECTOR, 3m CABLE CODE NO. 080G0075 080G0076 System components © Danfoss | DCS (rm) | 2019.04 DKRCC.PD.RS0.A4.
