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Elstat Nexo CMS200 Product Manual

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CMS200
PRODUCT MANUAL
Issue 6

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Ian De Gooijer
February 4, 2025

Hello! My fridge doesnt cool but it heats, how can i fix the settings?

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1 comments:
Mr. Anderson
February 10, 2025

To fix the cooling settings on your Elstat Nexo CMS200 fridge that heats instead of cools, follow these steps:

1. Check Temperature Settings: Ensure the temperature settings are correctly configured for cooling and not heating.
2. Verify Appliance Sensor: Confirm that the appliance sensor is reading the correct temperature and is properly connected. The controller should register a PF1 alarm if the sensor is disconnected.
3. Inspect Condenser and Fan: Check for any blockages in the condenser grill, ensure the condenser fan is functioning properly, and look for excessive freeze-up in the evaporator.
4. Adjust HT Parameter: Ensure the High Temperature (HT) parameter setting is appropriate for the ambient conditions.
5. Check for Refrigeration System Leaks: Inspect the system for any leaks that may affect cooling performance.
6. Perform a Half Reset: If required, reset the controller by following the half-reset procedure:
- Press the Set button.
- Enter the button sequence for the main menu.
- Press Set four times.
- Press Down twice.
- Press Up once.
- Press Defrost twice.
- Scroll to the half reset option and select it.

If the issue persists, consult a service technician.

This answer is automatically generated

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Summary of Contents for Elstat Nexo CMS200

  • Page 1 CMS200 PRODUCT MANUAL Issue 6...
  • Page 2 Copyright © Elstat Ltd 2017 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

    CMS200 Product Manual, Issue 6 CONTENTS 1. CONTROLLER WITH INTELLIGENCE 1.1  Control Display Module 1.2  Power Supply Module 1.3  Relay ratings 1.4  Temperature input ranges 1.5  Environmental ratings 2. ACCESSORIES 2.1  Temperature sensors 2.2  Door switch 2.3  Motion sensor 3. USER GUIDE 3.1  Power-up sequence 3.2  Function buttons 3.3  SubZero Firmware menus 3.4  The menu arrangement...
  • Page 4 Product Manual, Issue 6 CMS200 CONTENTS 5. COOLER AND CONTROLLER TROUBLESHOOTING TIPS 5.1  RSF Alarms 5.2  Door Switch Broken Alarms 5.3  Door Broken Alarms 5.4  Appliance Sensor Alarms 5.5  Condenser Sensor Alarms 5.6  Evaporator Sensor Alarms 5.7  Freeze-up protection (888) 5.8  Condenser high temperature (Ht) alarms 5.9  Other Problems 6. PARAMETER REFERENCE 6.1  Parameters by function...

  • Page 5: Controller With Intelligence

    Elstat’s game-changing Nexo platform is a powerful tool that connects drink brands directly to consumers at the point of sale, wherever they are in the world, to create sustainable and profitable relationships.
  • Page 6 Return/backward - De-selects menu options and parameters. Defrost Activates a manual defrost (only applicable if controller is set to timed defrost and temp is below termination temp). Logo Elstat logo LED Display 3-digit 7-segment LED display Sensor Motion sensor Page 6...
  • Page 7 CMS200 Product Manual, Issue 6 1.1.1 CDM Overall dimensions The overall dimensions of the CDM are shown in the following diagram: 30 mm 140 mm 111 mm 1.1.2 CDM Mounting The control display module is designed for panel mounting and is secured using the fitted clips. The aperture dimensions are as shown.

  • Page 8: Power Supply Module

    Product Manual, Issue 6 CMS200 1.1.3 CDM Electrical connections Modem interface RMD port (If applicable) Interface cable Evaporator sensor Door sensor Condenser sensor Appliance sensor Stock sensor RJ45 Port 1.2  Power Supply Module The power supply module (PSM) contains the power supply for the control unit and the relays to switch the following cooler components: Feature...
  • Page 9 CMS200 Product Manual, Issue 6 1.2.1 PSM Overall dimensions The overall dimensions of the PSM are shown in the following diagram: 134 mm 121 mm 1.2.2 PSM Mounting The power supply module is fitted with the following cables: High voltage cable terminated with 6-way connector for connecting to the compressor, lights, evaporator fan, and defrost heaters or valves.
  • Page 10 Product Manual, Issue 6 CMS200 The power supply module must be fixed using screws with the following characteristics: Head maximum diameter 7.8mm (0.31in) and minimum diameter 6.2mm (0.24in) Thread maximum diameter 4.8mm (0.19in). The screws must be tightened to a maximum torque of 0.5Nm (0.37lbfft). Note Using rivets to mount the power supply module invalidates the warranty.
  • Page 11 CMS200 Product Manual, Issue 6 1.2.3 PSM Electrical connections Description Colour Connectors Live Brown Evaporator fan Yellow Defrost heater Pink Neutral Blue Lights White Compressor 1.2.4 Wiring diagram A - Interface cable H - Control display module Q - Door switch B - Lights I - RMD R - Motion sensor C - Evaporator fan...

  • Page 12: Relay Ratings

    50ºC to 125ºC +/- 5.0ºC 122ºF to 257ºF +/- 10ºF Evaporator sensor -15ºC to 50ºC +/- 0.5ºC 5ºF to 122ºF +/- 1ºF Note The NTC thermistor from Elstat is rated at -35ºC to 125ºC (-31ºF to 257ºF). Page 12 www.nexo.com...

  • Page 13: Environmental Ratings

    CMS200 Product Manual, Issue 6 1.5  Environmental ratings Characteristic Power supply module Control display module IP Rating IPX5 IP65 Front Facia, IP24 All Over Maximum operating temperature Sub Zero PSM: 55°C (131ºF) 55ºC (131ºF) Minimum operating temperature 0ºC (32ºF) -10ºC (14ºF) Black polycarbonate, Food grade Black polycarbonate, Food grade Housing material...
  • Page 14 Product Manual, Issue 6 CMS200 Page 14 www.nexo.com...

  • Page 15: Accessories

    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; the condenser sensor cable can be purchased with a blue identification sleeve.
  • Page 16 (Ht) parameter. Ensure that the condenser sensor is fixed using a metal pipe clip (1) or foil tape (2) as shown. Elstat can supply pipe clips for 6-8 mm and 8-10 mm pipes. A - Condenser hot gas pipe (Condenser inlet pipe)

  • Page 17: Door Switch

    Door switches are used to detect door openings. They are SELV (safety extra low voltage) components that are able to create an open and closed circuit. The Elstat enhanced door switch, and activator, are over- moulded for increased physical protection and resistance to water ingress.
  • Page 18 60 mm Note Door switches and activators supplied by Elstat must not be installed using rivets. Using rivets invalidates the warranty. The alignment of the door switch and activator is critical for the correct operation of the door switch. The table details alignment tolerances.

  • Page 19: Motion Sensor

    CMS200 Product Manual, Issue 6 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 20 Product Manual, Issue 6 CMS200 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. 65 mm ...

  • Page 21: User Guide

    CMS200 Product Manual, Issue 6 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. For example, the temperature or USE. 3.2  Function buttons The controller buttons access the controller menus to view parameter values, reset the controller, and to run test routines.

  • Page 22: Subzero Firmware Menus

    Clears the self-learning matrix. Resets the parameters settings to the global default values and clears the self-learning matrix and statistics. Full reset Elstat use only. Downloads data from the controller to a computer for analysis. Data dump Elstat use only.

  • Page 23: The Menu Arrangement

    Selecting Hr - half re-set - will allow a half reset to be performed which will wipe the learning matrix, allowing the controller to re-learn outlet opening and closing times. Note The full reset is to be performed by Elstat personnel. The data dump is for Elstat use only for testing and development purposes. www.nexo.com Page 23...

  • Page 24: Menu Access

    Product Manual, Issue 6 CMS200 3.5  Menu access To enter the controller’s menus follow the routine below. Step Action Display Press the Set button The display shows: Enter the button sequence of the Main menu entry password Press the Set button four times (x 4) Press the Down button twice (x 2) Press the Up button once (x 1) Press the Defrost button twice (x 2)
  • Page 25 CMS200 Product Manual, Issue 6 3.6.1 Entering the test routine menu Step Action Display Press the Set button The display shows: Enter the appropriate password to access the main menu. The display shows: Press the Down button to scroll to the test (tSt) menu The display shows: Press the Set button to enter the test menu.
  • Page 26 Product Manual, Issue 6 CMS200 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 Compressor stopped running and Press disengaged compressor LED is off Press Press Defrost to return to the relay test menu.
  • Page 27 CMS200 Product Manual, Issue 6 Follow the routine below for Fan: Action Button Display Test Check Press Press Select fan Press Fan relay engaged Evaporator fan is on Press Fan relay disengaged Evaporator fan is off Press Press Defrost to return to the relay test menu. Follow the routine below for Buzzer: Action Button...
  • Page 28 Product Manual, Issue 6 CMS200 Follow the routine below for Heater: Action Button Display Test Check Press Heater Press Select heater Press Heater relay engaged Evaporator heater is on Heater relay Press Evaporator heater is off disengaged Press Press Defrost to return to the relay test menu. Follow the routine below for All outputs: Action Button...
  • Page 29 CMS200 Product Manual, Issue 6 3.6.3 The analogue input test The analogue input test (AnA) checks the connection between sensors and the controller are sound. Performing this test before starting work on the cooler can diagnose any loose connections or sensor probe faults.
  • Page 30 Product Manual, Issue 6 CMS200 Action Button Display Test Check Press Press Defrost to return to the analogue input test menu Press Condenser sensor input Condenser sensor Displayed temperature is as Press temperature expected Press Press Defrost to return to the analogue input test menu Press Evaporator sensor input Evaporator sensor...
  • Page 31 CMS200 Product Manual, Issue 6 3.6.4 The motion sensor test The motion sensor test (PIr) checks that the PIR (Passive Infra-red) sensor is picking up activity. Step Action Display Press Defrost to return to the analogue input test menu Press Defrost to return to the test menu From the test menu: Press the Down button to scroll to the PIR input test.

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

    Product Manual, Issue 6 CMS200 3.7  Viewing the last three cooler faults witnessed by the controller It is possible to view the last three faults (FLt) and understand problems that have occurred with the cooler. Step Action Display Press the Set button The display shows: Enter the appropriate password to access the main menu The display shows:...

  • Page 33: Half Reset

    CMS200 Product Manual, Issue 6 3.8  Half reset Half resets (Hr) are used to clear controller’s self learning matrix in the event that the controller has learned incorrect opening times due to being unable to detect activity correctly. The matrix may require clearing for reasons such as: The cooler has been moved from one store, to another - with different opening times The cooler has been prevented from learning due to an obstruction in front of the motion sensor...
  • Page 34 Product Manual, Issue 6 CMS200 Step Action Display Press the Up button to change ‘nO’ to ‘yES’ Press the set button to perform half reset The controller should reset and begin the power-up sequence. Page 34 www.nexo.com...

  • Page 35: Viewing Statistics

    CMS200 Product Manual, Issue 6 3.9  Viewing statistics Depending on the model, 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. Compressor: Number of compressor cycles and total compressor runtime.
  • Page 36 Product Manual, Issue 6 CMS200 Display Statistic Description Lowest temperature measured by the appliance sensor during Lowest temperature the last 24 hours. 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: Alarms And Troubleshooting

    CMS200 Product Manual, Issue 6 4. ALARMS AND TROUBLESHOOTING The CMS200 controllers can be set to sound a buzzer with alarm conditions. The following table shows examples of alarms that could be displayed on an CMS200 controller. Problem or Alarm Meaning Action Refrigeration Refer to Cooler &...

  • Page 38: Door Alarms 'Limp Home' Mode

    Product Manual, Issue 6 CMS200 4.3  Door alarms ‘Limp home’ mode The limp home aspect of this alarm ensures that the cooler continues to operate with limited disruption to the end user while determining if the door switch or the door itself is at fault. The cooler will operate during this period, cooling the products, while a service engineer visit is scheduled.

  • Page 39: Temperature Sensor Alarms

    3BarStack: An audio alarm sounds continuously. 4.4  Temperature sensor alarms Elstat controllers manage sensor failures as follows: PF1 alarms: CMS200 controllers will enter PF1 limp home mode. PF2 alarms: CMS200 controllers continue running the compressor and alternate the display between PF2 and the appliance sensor temperature indicating a fault.

  • Page 40: Refrigeration System Failure Alarms

    Product Manual, Issue 6 CMS200 4.6  Refrigeration system failure alarms Refrigeration system failure (rSF) alarms trigger if the set point (SP) temperature is not reached within the time defined by the compressor runtime (Ct) parameter. The limp home aspect of this alarm ensures that the cooler continues to operate with limited disruption to the end user.

  • Page 41: Cooler And Controller Troubleshooting Tips

    CMS200 Product Manual, Issue 6 5. COOLER AND CONTROLLER TROUBLESHOOTING TIPS 5.1  RSF Alarms Refrigeration system failure (rSF) alarms trigger if the set point (SP) temperature is not reached within the time defined by the compressor runtime (Ct) parameter. The controller has detected a problem with the cooling system, please check: Electrical connection from the output of the controller to the compressor Compressor circuit failure (including fuse protection if fitted) Adequate airflow through condenser –...

  • Page 42: Condenser Sensor Alarms

    Product Manual, Issue 6 CMS200 5.5  Condenser Sensor Alarms The controller has detected an open circuit on the condenser input, please check: The condenser sensor is properly connected to the condenser input on the controller The condenser sensor is reading the correct temperature – Temperature versus resistance: Thermistor is Negative Temperature Coefficient (NTC) The condenser input on the controller is in working order –...

  • Page 43: Other Problems

    CMS200 Product Manual, Issue 6 5.9  Other Problems 5.9.1 Cooler lights do not switch ON/OFF as expected Note: Enter the service mode via the APP or the In-code test routine via the front panel of controller to ensure that the controllers intended operation is not affecting the result. Ensure electrical connection from the output of the controller to the lights If applicable - Ensure the physical switch for the lights is switched ON.
  • Page 44 Product Manual, Issue 6 CMS200 5.9.5 If the compressor has failed The vast majority of all compressor failures are due to a problem with the system, that causes the compressor to fail. If you don’t find this problem with the system and correct it, a replacement compressor would also soon fail.

  • Page 45: Parameter Reference

    CMS200 Product Manual, Issue 6 6. PARAMETER REFERENCE Operation parameters define the alarms, self-learning, lights management, and also the delay to saving and the saving temperature disable. The parameter values vary between different cooler types, cooler characteristics, operating environments, brand requirements, and operational preferences. Parameter settings are defined by customers and can be loaded and edited automatically, via the XML files, or manually.

  • Page 46: Parameter Validation

    Product Manual, Issue 6 CMS200 6.2  Parameter validation The CMS200 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 CMS200 Product Manual, Issue 6 6.3.3 Calibration 1 (CA1) Display Description Calibrates or adds an offset to temperatures measured by the appliance sensor. Considerations Applied to all temperatures measured on the appliance sensor. Range -4.0 to 4.0°C (-7 to 7°F) Global default 0.0°C (0°F) 6.3.4 Compressor rest time (rt) Display...
  • Page 48 Product Manual, Issue 6 CMS200 6.3.6 Lights delay (Ld) Display Defines the delay to switch off the cooler lights after the controller switches to the Description Saving mode. Set in multiples of 30. Considerations Should only take affect once Delay to saving (dS) has completed. Range 0 to 120 minutes (in multiples of 30 minutes) Global default...
  • Page 49 CMS200 Product Manual, Issue 6 6.3.9 Celsius or Fahrenheit (CF) Display Description Option to set the controller to Celsius (°C) or Fahrenheit (°F). • A global reset sets controllers using Fahrenheit (°F) to Celsius (°C). Considerations • Applies to all temperature settings and values. Range 0 (°C) or 1 (°F) Global default...
  • Page 50 Product Manual, Issue 6 CMS200 6.3.12 Freeze-up protection (dtt) Display Defines the temperature to stop further cooling to prevent freeze-up due to low Description temperature. Considerations Must be set below the set point (SP) temperature. Range -10 to 10ºC (14 to 50ºF) Global default -6.0ºC (21ºF) 6.3.13 Defrost interval (dE)
  • Page 51 CMS200 Product Manual, Issue 6 6.3.15 Fan cycle on (FCO) Display Description Defines the active 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. Range 1 to 30 minutes Global default...
  • Page 52 Product Manual, Issue 6 CMS200 6.3.18 Buzzer duration (b1) Display Defines the duration of the buzzer for door open alarm conditions. Description If the door remains open after the buzzer duration (b1), the controller switches off the compressor for the duration of RT before starting door open ‘limp home’ mode. The controller switches off the compressor after the duration defined by alarm delay Considerations (Ad) + buzzer duration (b1 ).
  • Page 53 (LO) values are 10% of the actual line in voltages (see table below). • Must not be used with an external voltage stabiliser Considerations • Must only be used with the following Elstat supplied power supply modules (PSM): 30001-0102 or 30002-0102 Global default...
  • Page 54 Elstat Sub Zero PSM part number- 30001-0102, (120V) variant, or 30002-0102, (240V) variant. If Elstat ems 75 SZ PSM part number 3101-0102, (120V) variant, or part number 33102- 0102, (240V) variant, are used then the voltage management operation and the alarms that it will produce cannot be relied upon to accurately reflect the state of the mains power supply, and subsequent damage may occur to the cooler.
  • Page 55 CMS200 Product Manual, Issue 6 6.3.23 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. Considerations • If icing up occurs, review the values of the defrost parameters. Range -5 to 22ºC (23 to 72ºF) Global default...
  • Page 56 Product Manual, Issue 6 CMS200 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 High frequency 2 door openings or 6 motion counts The controller runs continuously for 48 hours in the ready mode.
  • Page 57 CMS200 Product Manual, Issue 6 6.3.27 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. The following alarm conditions trigger the buzzer: Refrigeration system failure (rSF), Sensor failure (PF1, PF2, PF3) and Ht alarms. Considerations Door alarms sound the buzzer as standard.
  • Page 58 Product Manual, Issue 6 CMS200 6.3.30 Display (dIS) Display Defines whether the controller displays the temperature (3.0 for example), or the Description word USE during the Ready mode. Considerations Controllers will always display alarms regardless of the dIS setting. Range 0 (USE) or 1 (temperature) Global default 1 (temperature) 6.3.31 Marketing mode (Ar)
  • Page 59 CMS200 Product Manual, Issue 6 6.3.33 Defrost termination method (dtF) Display Provides the option to end a defrost cycle as follows: • on the defrost duration (dd) only • on defrost duration (dd) or defrost termination temperature (dtd). Description If the defrost termination method (dtF) is set to use the defrost duration (dd) or the defrost termination temperature (dtd), the EMS controller ends the defrost cycle on the first to occur.
  • Page 60 Product Manual, Issue 6 CMS200 6.3.35 Defrost heater (dHr) Display Enables the use of an auxiliary relay to switch a defrost heater or solenoid valve. The Description defrost heater is a heating element located below the evaporator. Considerations None 0: Do not use a defrost heater. 1: Switch on the defrost heater during the defrost cycle and run the evaporator fan.

  • Page 61: Approvals

    CMS200 Product Manual, Issue 6 7. APPROVALS 7.1  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 North America (including Canada) - UL mark (Component Recognition) UL60730-1 / CSA E60730-1 UL60730-2-9 / CSA E60730-2-9 Federal Communications Commission (FCC)

  • Page 62: Bluetooth Approvals

    Instituto Federal de Telecomunicaciones (IFETEL) NOM-121-SCT1-2009 IC (Industry Canada) RSS-GEN, RSS-102, RSS-247 * Note Elstat Bluetooth Module This product is approved by ANATEL, according to the procedures regulated by Resolution 242/2000, and meets applied technical requirements. For more information, see the ANATEL site www.anatel.gov.br...

  • Page 63: Glossary Of Terms

    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. A cooler type which determines a firmware variant Elstat uses on Sub Zero Cooler certain products.
  • Page 64 CMS200 Product Manual Installation & set up guide Accessories User guide Troubleshooting Elstat Ltd Astra Business Centre, Roman Way, Preston, Lancashire PR2 5AP, UK www.nexo.com info@nexo.com...

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