Nexo ems100 Product Manual
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Nexo ems100 Product Manual

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ems100
PRODUCT MANUAL
Issue 4

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Summary of Contents for Nexo ems100

  • Page 1 All manuals and user guides at all-guides.com ems100 PRODUCT MANUAL Issue 4...
  • Page 2 All manuals and user guides at all-guides.com Copyright © Elstat Ltd 2014 All Rights Reserved All information in this document is property of Elstat Ltd Commercial use and distribution of the contents of this publication is not allowed without express and prior written consent of Elstat Ltd...

  • Page 3: Table Of Contents

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 CONTENTS 1. CONTROLLER WITH INTELLIGENCE 1.1  Functionality 1.2  User interface 1.3  Overall dimensions 1.4  Mounting 1.5  Electrical connections 1.6  Programming port cover 1.7  Wiring diagram 1.8  Relay ratings 1.9  Temperature input ranges 1.10  Environmental ratings...
  • Page 4 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 CONTENTS 4. TROUBLESHOOTING 4.1  ‘Limp home’ functionality 4.2  Door open alarms 4.3  Door alarms ‘Limp home’ mode 4.4  Not cooling problems 4.5  Temperature sensor alarms 4.6  Appliance sensor failure 4.7  Freeze-up protection (888)

  • Page 5: Controller With Intelligence

    The energy management system (ems) controllers from Elstat are used in a variety of drinks coolers, optimising energy savings, without compromising on drinks serving temperature. The ems100 Nexo controller is designed for applications such as single door coolers, double door coolers and vending machines.

  • Page 6: User Interface

    1.2  User interface All Elstat controllers are made from food grade materials and are safe for internal installation. The ems100 controllers are available with either an integrated or a remote motion sensor. Controller with integrated motion detection Controller with remote motion detection...

  • Page 7: Overall Dimensions

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 Item On display Name Function Motion Sensor Detects motion LED Display Displays the current status of the controller Programmable Port Enables upload of parameters using a dongle 1.3  Overall dimensions The overall dimensions of the controller are shown in the following diagram.

  • Page 8: Mounting

    If mounted too close the floor, water ingress may occur at the mains or line voltage terminals. Cable routing to the ems100 controller is critical as water can trace or follow the cable downwards. Therefore, immediately prior to the connection to the controller, a drip loop must be formed in all wiring as shown.

  • Page 9: Electrical Connections

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 1.5  Electrical connections Item Description Connectors Compressor Line in Fan(s) Light(s) Product Sensor 12VAC Evaporator Sensor Door Condenser Sensor Appliance Sensor Remote Motion Detector (If applicable) 1.6  Programming port cover...

  • Page 10: Wiring Diagram

    To remove the potential for damage occurring to, and the potential for failure of, the crimped connection on the mating half of terminals 1 to 4 of the ems100 Nexo controller it is recommended that only right angle insulated 6.3mm tab connectors, complete with strain relief, are used to terminate these cables.

  • Page 11: Relay Ratings

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 1.8  Relay ratings Maximum IEC rating Maximum UL ratings Relay @100-240VAC @ 120VAC Compressor 10 (10) A, p.f. 0.6 16 FLA, 96 LRA Lights 4 (4) A, p.f. 0.6...
  • Page 12 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 Page 12 www.nexo.com...

  • Page 13: Accessories

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 2. ACCESSORIES 2.1  Temperature sensors Temperature sensors are available from Elstat with various cable lengths. To help identify sensor cables during the installation, Elstat can supply sensor cables with blue identification sleeves. For example, if the appliance sensor cable is plain black;...
  • Page 14 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 2.1.2 Condenser sensor This sensor measures the temperature of the refrigeration system. Excessive condenser temperature is usually due to poor preventive maintenance, such as poorly cleaned condenser, or condenser fan failure.

  • Page 15: Door Switch

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 2.1.3 Evaporator sensor The evaporator sensor measures the temperature of the evaporator. The evaporator sensor should be placed in the immediate proximity of the evaporator. Mount the sensor head inside the evaporator cooling fins, as shown.
  • Page 16 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 Overall dimensions for the door switches are as shown. 40 mm 60 mm Note Door switches and activators supplied by Elstat must not be installed using rivets. Using rivets invalidates the warranty.

  • Page 17: Motion Sensor

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 Insert the white wire of the first cable into the connector of the second cable ensuring that the terminal is in the correct orientation. Connect the red wire from the first cable and the white wire from the second cable together using a butt splice or similar.
  • Page 18 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 For a motion sensor that is not mounted flush with the panel, the diagram shows the minimum recommended clearances to ensure motion detection. For example, if the motion sensor is mounted 15mm behind the panel, a 30mm diameter aperture is required.

  • Page 19: Transformer

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 2.4  Transformer The ems100 Nexo controller is powered up via the transformer that is available in two options: 120vAC/50-60Hz - 12vAC Transformer 230vAC/50-60Hz - 12vAC Transformer www.nexo.com Page 19...
  • Page 20 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 Page 20 www.nexo.com...

  • Page 21: User Guide

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 3. USER GUIDE 3.1  Power-up sequence 8. 8. 8. to confirm that all segments of the display are functioning correctly Platform type and firmware version. (example) Checksum of the parameter set. (example) The display then shows the appropriate display code.

  • Page 22: Indicators

    All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 3.3  Indicators Indicator Name Function Colour Compressor On when the compressor is running. Green On when the evaporator fan is running. Green On if the saving temperature is disabled.

  • Page 23: Gdc) Firmware Menus

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 Display State Description Problems may occur if the ambient temperature falls below 0°C Freeze-up (32°F) or if the appliance sensor fails. protection Refer to Troubleshooting - Freeze-up protection (888)

  • Page 24: The Menu Arrangement

    All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 3.6  The menu arrangement Set button - press to select - use to increase value - use to decrease value Defrost button - press to return Up button - press to scroll up Down button - press to scroll down Enter  Parameter password List (PS) And so on... Test Menu Relay Test  Compressor  (tSt) (rEL) (CP) Light (LIt) Fault List Analogue (FLt) Test (AnA) (FAn)

  • Page 25: Menu Access

    Analogue inputs (temperature sensors and door switch) Motion sensor Should a problem be suspected with ems100 Nexo controller it is recommended that the test routine is carried out before disconnecting or replacing the controller. The test routine can detect any loose or disconnected cables and check that the controller is connected properly to the lights, fan and compressor.
  • Page 26 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 3.8.1 Entering the test routine menu Step Action Display Press the Set button The display shows: Enter the appropriate password to access the menu. The display shows: Press the Down button to scroll to the test (tSt) menu...
  • Page 27 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 Follow the routine below for Compressor: Action Button Display Test Check Press Select compressor Compressor relay Compressor is running and Press engaged compressor LED is on Compressor relay...
  • Page 28 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 Follow the routine below for Fan: Action Button Display Test Check Press Press Select fan Evaporator fan and the fan LED is Press Fan relay engaged Evaporator fan and the fan LED is...
  • Page 29 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 Follow the routine below for All outputs: Action Button Display Test Check Press All outputs Press Select all outputs Press All outputs engaged All outputs are on Press...
  • Page 30 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 Then follow the routine: Action Button Display Test Check Appliance sensor input Appliance sensor Displayed temperature is as Press temperature expected Press Press Defrost to return to the analogue input test menu...
  • Page 31 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 Action Button Display Test Check Press Evaporator sensor input Evaporator sensor Displayed temperature is as Press temperature expected Press Press Defrost to return to the analogue input test menu...

  • Page 32: Viewing The Last Three Cooler Faults Witnessed By The Controller (Flt)

    All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 Then follow the routine: Action Button Display Test Check Press Press the Set button to enter the motion sensor test. Place your hand about 300mm from the motion sensor Move your hand from left to right.

  • Page 33: Half Reset (Hr)

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 Step Action Display The display shows: Press the Down button and scroll to FLt The display shows: Press the Set button to select The last three faults, or alarms, to occur are displayed for example:...
  • Page 34 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 A half reset will not: Adjust, change or alter any of the parameters, or their values, as set by the OEMs or Brands. Fix any issues with cable connection...

  • Page 35: Viewing Statistics

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 3.11  Viewing statistics Depending on the model, the controllers start gathering a variety of statistics when first powered up. Statistics provide information on the following, dependent on firmware: Activity: Number of motion counts and door openings.
  • Page 36 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 Display Statistic Description Total number of motion counts since first powered up or last Motion counts full reset Value of the standby temperature disable PEr parameter. Possible values are: OFF or ON.

  • Page 37: Troubleshooting

    Saving mode. 4.1  ‘Limp home’ functionality As the ems100 Nexo acts as a diagnostic device, and manages various operational functions of the cooler it serves to prevent faults from becoming critical to the cooler, for example over working of the compressor.

  • Page 38: Door Alarms 'Limp Home' Mode

    The cooler will operate during this period, cooling the products, while a service engineer visit is scheduled. The table below describes how the ems100 Nexo controls the cooler during this time and what the end user will see:...
  • Page 39 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 If in Saving mode and set point is achieved within twenty (20) cycles the controller reverts to normal operation and alternately displays: d0/3Bars. An audio alarm sounds for ten (10) seconds, every ten (10) minutes.

  • Page 40: Not Cooling Problems

    All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 4.4  Not cooling problems Follow the chart below to troubleshoot problems of the cooler not cooling properly leaving the cooler cabinet or product warm. Cooler or product is  Check cooler wiring  warm and fuses Is power...

  • Page 41: Temperature Sensor Alarms

    The limp home aspect of this alarm ensures that the cooler continues to operate with limited disruption to the end user. The cooler will operate, cooling the products, while a service engineer visit is scheduled. The table below describes how the ems100 Nexo controls the cooler during this time and what the end user will see:...

  • Page 42: Freeze-Up Protection (888)

    All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 While the controller displays the above, the controller is managing the compressor and the fans: The compressor cycles fifteen (15) minutes off, then five (5) minutes on. The fan switches on with the compressor on cycle, then cycles when the compressor is in the off cycle as set by the FCO (fan cycle on) and FCF (fan cycle off) parameters.
  • Page 43 The refrigeration system will operate - cooling the products - while a service engineer visit is scheduled. The table below describes how the ems100 Nexo controls the cooler during this time and what the end user will see:...

  • Page 44: Condenser High Temperature (Ht) Alarms

    All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 4.9  Condenser high temperature (Ht) alarms Condenser high temperature (Ht) alarms alert to problems with the refrigeration system such as a blocked condenser or faulty condenser fan. Follow the chart to troubleshoot condenser high temperature (Ht) alarms.

  • Page 45: Parameters

    Parameter settings are defined by customers and can be loaded and edited automatically, via the XML files, or manually. This section lists the full set of parameters relevant to the ems100 controller, with their descriptions, ranges and default values detailed for reference.

  • Page 46: Parameter Validation

    5.2  Parameter validation The ems100 Nexo controller validates the parameter values that have been manually set by the user by checking that the values do not clash with each other. Below is the set of rules the controller validates the parameter values against: SP must be >...
  • Page 47 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 5.3.2 Differential (dIF) Display Defines the compressor cut-in temperature when added to the set point (SP) Description temperature during the Ready mode. If the differential (dIF) is set too low, for example, less than 2.0°C the compressor may Considerations cycle on the minimum compressor rest time (rt).
  • Page 48 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 5.3.5 Delay to saving (dS) Display Defines the delay in switching to the Saving mode from Ready mode. Description The delay starts at the end of the last active 30 minute period of the Ready mode.
  • Page 49 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 5.3.8 Refrigeration system failure (Ct) Display Defines the maximum continuous runtime of the compressor without reaching the set point (SP) temperature. Description If the set point (SP) temperature is not reached within this time, the controller enters the RSF Limp home mode.
  • Page 50 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 5.3.11 Saving set point (SSP) Display Description Defines the compressor cut-out temperature during the Saving mode. Considerations Must be set above the set point (SP). Range 0.0 to 9.9°C (32 to 50°F) Global default 7.0°C (45°F)
  • Page 51 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 5.3.14 Defrost interval (dE) Display Defines the period between the end of defrost cycle and beginning of the next defrost Description cycle. A time-based defrost cycle helps improve evaporator efficiency.
  • Page 52 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 5.3.17 Fan cycle off (FCF) Display Description Defines the inactive period of the evaporator fan while the compressor is switched off. Considerations Fan cycle is the fan cycle on (FCO) time + the fan cycle off (FCF) time.
  • Page 53 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 5.3.20 Motion sensor enable (Sn) Display Description Enables the input from the motion sensor. Considerations Must be disabled if a motion sensor is not fitted. Range 00 (disabled) or 01 (enabled)
  • Page 54 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 110-120V line 220-240V line voltage voltage Disabled Note: Voltage measurement is accurate to typically ± 10% Caution Low voltage protection is not calibrated and actual performance can be influenced by several factors.
  • Page 55 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 5.3.24 Defrost termination temperature (dtd) Display Defines the temperature to end the defrost cycle. Description Ending defrost cycles on temperature minimizes the duration of defrost cycles. • Must be set above the set point (SP) plus differential (dIF) temperature.
  • Page 56 All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 The table below describes the values for activity frequency (AF). Value Name Description Low frequency 1 door opening or 1 motion count Medium frequency 1 door opening or 3 motion counts...
  • Page 57 All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 5.3.28 Buzzer enable (b0) Display Enables or disables a warning buzzer for alarm conditions. Door open alarms always Description sound the warning buzzer regardless of this parameter setting. Following alarm conditions trigger the buzzer: Refrigeration system failure (rSF) Sensor failure (PF1, PF2).
  • Page 58 5.3.33 Shelf data enable (ShF) Display Description Option to allow the Nexo controller to log stock sensing data to be sent to the cloud. Input will still be operational when viewed via the test routine (tSt). Considerations Stock sensing hardware currently unavailable.

  • Page 59: Approvals

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 6. APPROVALS 6.1  Product Approvals Conformité Européene / European Conformity (CE) EN60730-1 EN60730-2-9 European Norms Electrical Certification (ENEC) EN60730-1 EN60730-2-9 International Electrotechnical Commission (IEC) IEC60730-1 IEC60730-2-9 Glow wire: IEC60335-1...

  • Page 60: Bluetooth Approvals

    All manuals and user guides at all-guides.com Product Manual, Issue 4 ems100 6.2  Bluetooth Approvals Agência Nacional de Telecomunicações (ANATEL) Resolução Anatel nº 242 * See note below Bluetooth Special Interest Group (SIG) Bluetooth ® Qualified Design La Comisión Nacional de Comunicaciones (CNC) Resolución SC 729/80 - Resolución SC 784/87...

  • Page 61: Glossary Of Terms

    All manuals and user guides at all-guides.com ems100 Product Manual, Issue 4 7. GLOSSARY OF TERMS 7.1  Acronyms The table below explains the meanings of the most common acronyms used in this manual. Acronym Meaning ems or Energy Management The Elstat range of products in this group are all energy management System systems.
  • Page 62 All manuals and user guides at all-guides.com ems100 Product Manual Installation & set up guide Accessories User guide Troubleshooting Elstat Ltd Astra Business Centre, Roman Way, Preston, Lancashire PR2 5AP UK T: +44 161 227 7200 F: +44 161 227 7201...

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