Danfoss EKE 1A User Manual
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Danfoss EKE 1A User Manual

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

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Summary of Contents for Danfoss EKE 1A

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

  • Page 2: Table Of Contents

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Contents Introduction Portfolio overview Installation Environmental conditions: Mounting General Connection’s overview Cabling lengths for different connections Connecting Relay Outputs Temperature Sensor Mounting Power and signal sharing 3.7.1 Sharing Power Sources 3.7.2 Sharing input signal 3.7.3...
  • Page 3 Superheat controller, Type EKE 1A, 1B, 1C, 1D 6.2.2 Temperature Control Parameters 6.2.3 Offsetting Superheat, Temperature and OD Via External signal 6.2.4 Compressor feed Forward function Other features and modes 6.3.1 Startup and Defrost Modes 6.3.2 Protection features 6.3.3 Manual Mode 6.3.4...

  • Page 4: Introduction

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 1 Introduction 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 up to 20% with minimal effort.

  • Page 5: Portfolio Overview

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 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% • • • •...
  • Page 6 Stepper motor valves M12 Angle Cables EKE is compatible with Danfoss stepper motor valves i.e Danfoss ETS 5M, ETS 6, Various lengths of standard M12 cable are available for connecting stepper motor ETS, KVS, ETS Colibri®, KVS colibri®, CTR, CCMT.

  • Page 7: Installation

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 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...
  • Page 8 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 3: EKE 1A connection overview Master controller Optional MMIGRS2 Display CAN RJ 080G0294 (optional) *Note; IF Dl1(ON/Off) switch is not used it Pressure Transmitter must be turned off in Ratiometric 0.5 – 4.5 V...
  • Page 9 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 4: EKE 1B connection overview Master controller MMIGRS2 Display RS485 MODBus CAN RJ 080G0294 (optional) Supervisor MMIMYK network Gateway AKS Cable connection 060G1034 Pressure transmitter CAN RJ CAN RJ e.g. AKS 32R...
  • Page 10 • EKE 2U Backup power module is recommended to ensure closure of the electronic valves. in case of power failures • If Dl1(On/Off) switch is not used it must be short circuited • EKE 1A/1B/1D only support Ratiometric 0.5 to 4.5V pressure transmitter © Danfoss | Climate Solutions | 2022.06...
  • Page 11 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 6: EKE 1C - Back board connection overview Superheat controller Superheat controller EKE 1C - 080G5400 C1 NO1 Power power supply – C1 NC1 18 V Alarm Relay Power 24 V AC 24 V DC 2.5 A...
  • Page 12 • EKE 2U Backup power module is recommended to ensure closure of the electronic valves. in case of power failures • If Dl1(On/Off) switch is not used it must be short circuited • EKE 1A/1B/1D only support Ratiometric 0.5 to 4.5V pressure transmitter Figure 8: EKE 1D connection overview...

  • Page 13: Cabling Lengths For Different Connections

    • The stepper motor is connected to the “Stepper Valve” terminals (see terminal assignment) with Danfoss M12 connection cable. • To configure stepper motor valves other than Danfoss stepper motor valves, the correct valve parameters must be set as described in the Valve configuration section (see the configuration section for details).

  • Page 14: Connecting Relay Outputs

    • You can overcome this degradation by changing the settings for the valve driver. This guideline is based on the cable type being the same type as the standard Danfoss stepper motor cable Table 15: Recommended wire size and cable distance (twisted pair) between EKE controller and stepper motor valve Cable length 1 m –...

  • Page 15: Temperature Sensor Mounting

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 10: SPDT relay Power C1 NO1 Power Relay Normally open or normally closed (optional) Alarm ON/OFF solenoid valve  NOTE: The relays cannot be used for the direct connection of loads such as LEDs and ON/OFF control of EC motors. All loads with a switch-mode power supply must be connected to a suitable contactor or similar 3.6 Temperature Sensor Mounting...

  • Page 16: Power And Signal Sharing

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 3.7 Power and signal sharing 3.7.1 Sharing Power Sources The EKE 1x series can share common power supplies with multiple controllers because the power supply input of the EKE is galvanically isolated from the outputs. The external power supply must have enough power rating Watt/VA to operate multiple EKEs and most importantly enough power to run the valves.

  • Page 17: Sharing Input Signal

    3.7.3 Sharing pressure sensor signal For EKE 1A, EKE 1B, EKE 1D up to 5 controllers can share one Ratiometric pressure transmitter readings. To get a correct acquisition on all the units all the three wires (GND, 5V and transmitter signal, output) must be routed to every unit ©...
  • Page 18 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 16: Signal sharing between EKE 1A, 1B, 1C, 1D EKE 1B EKE 1B EKE 1B Signal Supply (GND, 5V and transmitter signal, output) must be routed to every unit  NOTE:...
  • Page 19 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 17: Sensor Signal sharing Temperature sensor Pressure transmitter EKE 1C EKE 1C EKE 1C Jumper Jumper Receiving Sensor Signal via Modbus:EKE 1B/1C controllers can receive the external sensor values like Po, Pc, S2, S3 and S4 via Modbus.

  • Page 20: Applications

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 4 Applications EKE series devices are used where precise control of superheat in air conditioning system is needed. It helps achieving high energy efficiency and reliable operation EKE serves 2 main applications: •...

  • Page 21: Driver Mode

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 20: Temperature control application Preset OD / Defrost Heat / cool mode main switch Battery Power 24 V AC / 24 V DC External reference Optional connection EKE controller Mandatory connection...

  • Page 22: Typical Eke Applications

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 4.3 Typical EKE applications The EKE 1x series can be used for various refrigeration applications like Chiller, Reversible Chillers, Reversible Heat pump, AC air handler, cold room Standalone, Multi evaporators ext. Chiller (cooling only)
  • Page 23 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 24: Reversible Chiller Heating ETS Colibri® Reversible heat pump Figure 25: Air to water heat pump cooling ETS Colibri® controller controller © Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 23...
  • Page 24 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 26: Air to water heat pump cooling ETS Colibri® controller controller AC air handler Figure 27: AC air handler AC air handler ETS Colibri® Cold Room © Danfoss | Climate Solutions | 2022.06...
  • Page 25 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 28: Cold Room Cold room Cold room controller controller ETS Colibri® In door In door Out door Out door Multi evaporator Figure 29: Multi evaporator ETS Colibri® ETS Colibri® controller controller ©...

  • Page 26: User Interface

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 5 User Interface In this section the user interfaces are described. EKE 1x controllers can be used with 2 main user interfaces: • MMI display • KoolProg Software 5.1 Configuration using MMI Display MMIGRS2 is a graphical display.

  • Page 27: Mmigrs2 Setup And Service

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 31: MMIGR2 Back view CAN connector Termination Jumper between R and H For cable >3m (only EKE 1C) 2-way screw connector for power supply 4-way screw connector for CANbus network  NOTE: Even when connecting to the MMI via CAN RJ12 cable, it is still required to short R and H of the MMI.

  • Page 28: Mmigrs2 Main Screen

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 32: MMI setup and service Power on Login PW: Commissioning 300 Service 200 Daily 100 Press and hold enter Setup and service Status menu Reference QR code Control Controller info Defrost...
  • Page 29 Superheat controller, Type EKE 1A, 1B, 1C, 1D Table 18: Navigation through MMIGRS2 Unit Status Function Description Home screen Shows the operating status. Right x1 Active alarms Access to Active alarm list. Press UP and Down button to see complete list...

  • Page 30: Err31 Error Alarm On The External Display - Mmigrs2

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Table 19: Examples Parameter Navigation Parameter change(R012) Factory re-setting of display: Navigation and reading the status of the parameters For examples, parameter R012 (for the main switch). Pressing the bottoms X and ENTER at the same is possible.

  • Page 31: Configuration Using Koolprog Software

    Superheat controller, Type EKE 1A, 1B, 1C, 1D  NOTE: This mode only has a home screen and do not have any menu structure. All function is carried out using the “Escape”, “Up”, “Down” and “Enter” buttons on MMIGRS2 Service mode is only available via MMIGRS2 display. This function is not possible in KoolProg...
  • Page 32 • Find all the technical documentation for each controller model within one location 4.2.1 Setting Up KoolProg KoolProg software supports wide range of Danfoss product, so first you need to select the EKE 1x series from the preferences. Figure 38: Setting Up KoolProg Then if you want to setup, click the set parameter and select a new project ©...
  • Page 33 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 39: Setting Up KoolProg Then select the EKE variant you have Figure 40: Setting Up KoolProg Figure 41: Setting Up KoolProg  NOTE: • The product code number and product versions are found in the product label.
  • Page 34 Superheat controller, Type EKE 1A, 1B, 1C, 1D The KoolProg wizard, is a tool that allows you to quickly set the parameters for your specific application. The workflow for the wizard is as follows: The Wizard is a quick tool for configuration, the workflow is as follows...
  • Page 35 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 46: Configuration using KoolProg wizard 4.2.3 KoolProg Set parameters menu The main menu is used to get a configuration file with the desired settings that can be uploaded to EKE 1x devices, you can customize the parameter according to your specific application.
  • Page 36 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 48: Uploading the settings to EKE Table 20: KoolProg main Menu Summary Parameter Group Setup description Reference Main switch, Mode selection General control parameter for example selecting control mode, protection function ext.., it is divided into 3...
  • Page 37 Superheat controller, Type EKE 1A, 1B, 1C, 1D 4.2.5 KoolProg On-line service Menu: The service menu allows a quick analyze controller behavior and program patterns by using the graphical tool. It is also possible to make online changes to parameter configurations and monitor live status of inputs and outputs.

  • Page 38: Quick Configuration

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 53: Logging parameters as graphs 5.3 Quick Configuration Apart from wizard setup, users can also use the following section which describes quick parameter settings for general applications. For both mode Controller Mode or Driver Mode. The parameters are explained in more detail in the following section.
  • Page 39 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 54: Quick guide for parameter selection Driver Controller Make sure that main switch is OFF before changing Start : Main switch= Off the settings. The setting will depend on the system requirement.

  • Page 40: Configuration

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 6 Configuration 6.1 Driver Mode In this mode The EKE 1x is acting as stepper motor valve driver, where master is commanding the valve opening degrees to the EKE controller. In this mode, no sensor is needed as we are not doing any superheat control. The control signal can be: •...

  • Page 41: Superheat Control Mode

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Table 22: Driver Mode using Communication Bus Parameter Function Description Mode selection, select 1 to operate as valve driver RI02 Operation mode 1 = valve Driver, Select reference configuration, 1- Modbus to OD| the controller receives opening degrees from...

  • Page 42: Superheat Reference Calculation Parameters

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Function Selector Description Pe transmitter Select based on the supported I086 Selection of the used pressure sensor. configuration pressure sensors Control Basic User defined refrigerant is possible by Selecting R user and define An-...
  • Page 43 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Function Description It is recommended to set the SH close setpoint 2k below the minimum SH. N119 SH close setpoint Default value =2 K (recommended). I082 S2 sensor configuration -Selection of the used evaporator temperature sensor S2...
  • Page 44 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 61: Load AP Applicable Figure 62: Load AP parameters 100 % 90 % 10 % Min. SH Max. SH Superheat Table 26: Load AP parameter Parameter Function Description R102 Operation mode...

  • Page 45: Temperature Control Parameters

    These modes require one extra temperature sensor S3 or S4, the user can select only one sensor not both.  WARNING: Superheat control with Thermostatic Mode is not available on EKE 1A. ON/OFF thermostat In this mode, if temperature is above the set point + differential cooling is started with maximum cooling capacity.
  • Page 46 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 66: ON/OFF thermostat “Warm” brine / water Plate heat exchanger “Cooled” brine / water Expansion valve  WARNING: Need for Defrosting During cooling is not considered. If defrosting is needed another system must ensure defrosting is done when needed.

  • Page 47: Offsetting Superheat, Temperature And Od Via External Signal

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Modulating thermostat (MTR) When the temperature is well above the MTR set point (The MTR reference is defined by temperature set point + ½ differential) cooling capacity is at maximum and superheat is controlled to be on superheat reference. When temperature is getting close to the MTR reference the cooling capacity gradually reduce so that the temperature can be stable on the MTR reference and the superheat will be floating.
  • Page 48 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 70: Offsetting Superheat, Temperature and OD Via External signal Offset Offset R006 R006 Ext. ref offset max. Ext. ref offset max. R106 I036 Ext. ref offset min Ext ref. current low...

  • Page 49: Compressor Feed Forward Function

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Function Description Define how the external reference signal is used 1 = V->SH: Displacement of SH reference given by External voltage signal. 2 = V->Max OD: Maximum opening degree of the valve given by external voltage signal 3 = V->Temp: Displacement of temperature given External voltage signal.

  • Page 50: Other Features And Modes

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Table 33: Compressor feed Forward Parameter Function Description N135 Comp. speed feed forward function 0 = Off | 1 = On, default Off R100 Compressor Capacity compressor capacity value in percentage via Modbus The point where SH control is starting to slow.
  • Page 51 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Function Description Startup N102 0 = Prop. Ctrl mode Minimum Min value: 1 second | Max value: 240 seconds N104 startup If the SH crosses the reference between minimum startup time, and startup time the Proportional control is disabled.

  • Page 52: Protection Features

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Table 35: Start OD without protection Parameter Function Description N102 Startup mode 2 = Minimum OD without protection Min value: 1 second | Max value: 600 seconds N105 Startup time After startup time the Startup OD is Disabled, and controller will switch to the set control mode.
  • Page 53 Superheat controller, Type EKE 1A, 1B, 1C, 1D • Fail safe operation • Superheat close • LOP (Low operating pressure) • MOP (Maximum operating pressure) • HCTP (High condensing temperature protection) • Min. S4 (Minimum S4 temperature) Figure 77: Protection features (limiters)
  • Page 54 Superheat controller, Type EKE 1A, 1B, 1C, 1D Table 39: Thermostat Failsafe mode Thermostat Failsafe mode Description Thermostat sensor error. User can via parameter [N144] Thermostat sensor error action] configure the rel- Thermostat operation needs the signal selected in [R015 Sensor select] to oper- evant option.
  • Page 55 Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 79: Lowest Operating Compressor start Valve is opening to avoid Te going lower Outdoor temp Te evaporator temperature Lop setpoint Superheat Table 42: Lowest Operating Pressure (LOP) Parameters Parameter Function Description...
  • Page 56 Superheat controller, Type EKE 1A, 1B, 1C, 1D Table 43: Maximum Operating Pressure (MOP) Parameters Parameter Function Description N130 MOP function 0 = Off | 1 = On, default value = Of N011 MOP setpoint Setpoint unit is saturated temperature in evaporator. If the suc- tion pressure reaches the set MOP limit, the valve will close faster irrespective of superheat.

  • Page 57: Manual Mode

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Figure 83: Minimum S4/leaving media °C “Warm” brine / water Plate heat exchanger S4 min S4 min “Cooled” brine / water Time Electric expansion valve  NOTE: 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.

  • Page 58: Valve Configuration

    Function Description Danfoss stepper motor are easily 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.
  • Page 59 Superheat controller, Type EKE 1A, 1B, 1C, 1D Table 51: Parameters Non-Danfoss valves: for Danfoss vales these parameters are preconfigured, if the user decides to use a valve from a different manufacturer, then these parameters must be provided by the user.

  • Page 60: Adding User Defined Refrigerant

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Table 52: Common Valve parameters (For Danfoss/Non-Danfoss valves) Parameter Function Description For some application, it is required that the valve remains open after the control- ler is off. This parameter defines that OD in %.

  • Page 61: Parameter List

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 7 Parameter List Table 54: Parameter list Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index Reference Refrigeration R012 Main switch 3001 550B 0 = Off | 1 = On...
  • Page 62 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index 0 = no valve | 1 = User- Def | 2 = ETS 12C | 3 = ETS 24C | 4 = ETS 25C | 5 = ETS 50C | 6 = ETS 100C | 7 = ETS 6 | 8 = ETS 12.5 |...
  • Page 63 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index 0 = Not defined | 1 = EKS S2 sensor 221 | 2 = ACCPBT I040 configura- 3105 550C...
  • Page 64 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index Pc current I038 3122 550C Pc current I039 3123 550C high 0 = Not defined | 1 = AKS...
  • Page 65 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index Ext ref. con- 0 = Not Used | 1 = V->SH I090 figuration | 2 = V->Max OD 0 = Not Used | 1 = V->SH | 2 = V->Max OD | 3 = V-...
  • Page 66 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index 0 = Prop. Ctrl | 1 = Fix OD Startup N102 3023 550B w prot | 2 = Fix OD wo...
  • Page 67 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index Compressor speed feed- N135 3055 550B 0 = Off | 1 = On forward function FF low ca- Compressor...
  • Page 68 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index Low Min S4 A100 1200 3081 550C delay Low Min S4 A101 3082 550C band Upper tem- A001 perature...
  • Page 69 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index Controller G001 3167 550C address 0 = 0 | 1 = 1200 | 2 = 2400 | 3 = 4800 | 4 =...
  • Page 70 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index User con- X037 4074 550F 0 = Off | 1 = On trols LEDs User control Green LED X038...
  • Page 71 Superheat controller, Type EKE 1A, 1B, 1C, 1D Parameter Modbus Can In‐ Can Sub‐ Label Variants Default Unit Enumeration name index DI defrost U110 4033 550F 0 = Off | 1 = On start U111 DI preset OD 4034 550F...

  • Page 72: Alarms And Troubleshooting

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 8 Alarms and troubleshooting Depending on the application, the EKE 1x series implements error codes and alarms to help the user troubleshoot and correct parameters easily. When an alarm occurs, the following actions generally ensue: •...

  • Page 73: Sensor Alarms/Errors

    Superheat controller, Type EKE 1A, 1B, 1C, 1D Label Alarm description Actions during ac‐ Trigger (how the alarm IS How to clear the alarm Remark tive raised) E107 SH min higher than Auto operation SH max lower than SH low Adjust SH max or SH low, SH NO10 SH min.

  • Page 74: Stepper Alarms/Errors

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 8.1.3 Stepper alarms/errors Table 57: Stepper alarms/errors Label Alarm description Actions during ac‐ Trigger (how the alarm IS How to clear the alarm Remark tive raised) E103 No valve configured Auto operation...

  • Page 75: Application Alarms

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 8.1.5 Application alarms Table 59: Application alarms Label Alarm description Actions during ac‐ Trigger (how the alarm IS How to clear the alarm Remark tive raised) A994 Low S4 media outlet Injection active and Min S4...

  • Page 76: Stop State Alarm

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 8.1.7 Stop state alarm Table 61: Stop state alarm Label Alarm Actions during ac‐ Trigger (how the alarm IS How to clear the alarm Remark descrip‐ tive raised) tion W002 Standby Controller is in stop state...
  • Page 77 Superheat controller, Type EKE 1A, 1B, 1C, 1D Symptom Possible cause/Reaction Solution Liquid hammer in compres- Superheat reference set too low. • Increase the SH reference by changing the SH min. sor (noisy or unusual com- max. parameter. pressor sound) and /or frost Superheat is too low.
  • Page 78 Superheat controller, Type EKE 1A, 1B, 1C, 1D Symptom Possible cause/Reaction Solution Superheat outside the de- Wrong valve selected or its valve parameter. • Check the right valve type and its setting. fined range or does not Loss of refrigerant in the system.
  • Page 79 Superheat controller, Type EKE 1A, 1B, 1C, 1D Symptom Possible cause/Reaction Solution Flash gas Loud refrigerant or undercharged refrigerant. • Charge the system with appropriate refrigerant capaci- • Check for leakage is the system. • If the valve is placed much higher than condenser tweet check pressure difference.
  • Page 80 Installation guide. • For other valves than Danfoss, check with valve suppli- er for the right connection. Wrong connection of wires at cable joint, if there is exten- • Check for the right color configuration at the joint.

  • Page 81: Appendix

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 9 Appendix Table 64: Appendix 1: Acronyms and abbreviations used in this document Full name Abbreviation Compressor Comp. Capacity Controller cont Actual Temperature at evaporator outlet Media inlet temperature Media out temperature...

  • Page 82: Ordering

    Superheat controller, Type EKE 1A, 1B, 1C, 1D 10 Ordering Table 65: Product part numbers Description Pack format CodeNo. Electronic controller EKE 1A Single pack 080G5300 Electronic controller EKE 1B Single pack 080G5350 Electronic controller EKE 1C Single pack 080G5400...

  • Page 83: Certificates, Declarations, And Approvals

    Some approvals may change over time. You can check the most current status at danfoss.com or contact your local Danfoss representative if you have any questions.

  • Page 84: Online Support

    Danfoss cannot accept any responsibility for possible errors in catalogues, brochures, videos and other material.

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