Nexo ems100 Product Manual Download Page 41

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ems100

Product Manual, Issue 4

www.nexo.com

Page 41

4.5

Temperature sensor alarms

Sensor faults may also be identified by using the input test within the test routines (tSt).

Elstat controllers manage sensor failures as follows:

PF1 alarms: The controller will enter PF1 limp home mode.

PF2 alarms: The controller will continue running the compressor. The display alternates

between PF2 and the appliance sensor temperature indicating a fault.

Perform

the

analogue

sensor

test

Are

sensors

securely

fitted?

either

sensor

open

circuit?

Yes

Replace

controller

Replace

faulty

sensor

Yes

Secure

loose

sensor

Alarm

cleared?

Fault

cleared

Yes

4.6

Appliance sensor failure

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:

Audio alarm

Display

Audible alarm sounds five times every compressor cycle (compressor switches ON or

OFF) - if the buzzer is enabled.

All manuals and user guides at all-guides.com

all-guides.com

Summary of Contents for ems100

Page 1: ...ems100 PRODUCTMANUAL Issue 4 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 2: ...d 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 All manuals and user guides at all guides com ...

Page 3: ...11 1 10 Environmental ratings 11 2 ACCESSORIES 2 1 Temperature sensors 13 2 2 Door switch 15 2 3 Motion sensor 17 2 4 Transformer 19 3 USER GUIDE 3 1 Power up sequence 21 3 2 Function buttons 21 3 3 Indicators 22 3 4 Display codes 22 3 5 GDC Firmware menus 23 3 6 The menu arrangement 24 3 7 Menu access 25 3 8 Test routines tSt 25 3 9 Viewing the last three cooler faults witnessed by the controller...

Page 4: ...ppliance sensor failure 41 4 7 Freeze up protection 888 42 4 8 Refrigeration system failure rSF alarms 42 4 9 Condenser high temperature Ht alarms 44 5 PARAMETERS 5 1 Parameters by function 45 5 2 Parameter validation 46 5 3 Parameters definition 46 6 APPROVALS 6 1 Product Approvals 59 6 2 Bluetooth Approvals 60 7 GLOSSARY OF TERMS 7 1 Acronyms 61 7 2 Controller and accessory terms 61 All manuals ...

Page 5: ...such as defrost or teach and alarm conditions Also push buttons that enable the end users to cancel alarms and service technicians to run test routines Product temperature An appliance sensor measures temperature of the refrigeration compartment EMS controllers use the refrigeration temperature to manage the product temperature Refrigeration system high temperature alarm An optional condenser sens...

Page 6: ... the controller can be installed internally on the cooler but the remote motion sensor must be installed where it can see activity Item LED Indicator Name Function Colour 1 Compressor Compressor indicator Green 2 Evaporator fan Evaporator fan indicator Green 3 Saving temperature disable Saving temperature disable indicator Red 4 Motion Motion indicator Red Item Push Button Name Function 5 Set Acce...

Page 7: ...ED Display Displays the current status of the controller 11 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 142 mm 127 8 mm 47 8 mm 63 mm 120 mm 41 mm 103 mm All manuals and user guides at all guides com ...

Page 8: ... close to the floor water ingress may occur 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 An appropriate level of protection must be given...

Page 9: ...When accessing the programming port on the controller fascia remove the rubber cover and let it hang on the attaching strap This will prevent misplacing the port cover Note Do not remove programming port cover fully Detaching the cover from the controller fascia can damage the attaching strap On completion of controller programming ensure that the programming port cover is replaced inserting the l...

Page 10: ...inate these cables Use of straight connectors may exert excessive pressure on to that connector A Controller I Modem interface R Lights out B Appliance sensor J Motion sensor S Line in C RMD K 12VAC T Transformer D Evaporator sensor L Live U Evaporator fan E Door switch N Neutral V Lights F RJ45 Port M Stock product sensor W Compressor G Condenser sensor P Fan out H Display Q Compressor out Note A...

Page 11: ... 5 C 5 F to 122 F 1 F Condenser sensor 50 C to 125 C 5 0 C 122 F to 257 F 10 F Evaporator sensor 15 C to 50 C 0 5 C 5 F to 122 F 1 F Note The NTC negative temperature coefficient thermistor from Elstat is rated at 35 C to 125 C 31 F to 257 F 1 10 Environmental ratings Characteristic Value IP Ingress Protection Rating IP45 Front Fascia IP24 All Over Maximum operating temperature 55 C 131 F Minimum ...

Page 12: ...Product Manual Issue 4 ems100 www nexo com Page 12 All manuals and user guides at all guides com ...

Page 13: ... by Elstat should be used The NTC thermistor is rated from 35ºC to 125ºC 31ºF to 257ºF 2 1 1 Appliance sensor The appliance sensor measures air temperature of the refrigerated compartment by measuring the return air temperature The diagram shows the recommended position of the appliance sensor The appliance sensor measures the air temperature after the air has been drawn over the products The retu...

Page 14: ...denser is approximately 75 blocked The temperature is then set as the value of the condenser high temperature 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 B C D E A Condenser hot gas pipe Condenser inlet pipe B Condenser C Compressor D Liquid pipe Condenser outlet pipe E HT Senso...

Page 15: ...se cable ties The head of the sensor is fragile and can be easily damaged Using cable ties to secure the sensor head or sensor cable invalidates the warranty 2 2 Door switch Door switches are used to detect door openings They are SELV 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 re...

Page 16: ... the gap z dimension is correct Y Vertical 0mm 0in 10mm 0 4in Measured when the door is closed and the gap z dimension is correct Z Gap 0mm 0in to 5mm 0 2in 2mm 0 07in The diagram below shows the horizontal vertical and gap alignment between the door switch and the activator for open and closed doors Z X Y To mount door switches on double door coolers two door switches must be connected in series ...

Page 17: ...ed location of the motion sensor is in the upper section or in header panel of the cooler to ensure the best motion detection and to lower the risk of the motion sensor being blocked by objects such as packages For the controllers without integrated motion sensor a remote motion sensor can be used The remote motion sensor head is supplied detached from the cable to allow the cable to be easily rou...

Page 18: ... mm 15 mm The motion sensor head must be fixed using counter sunk screws or bolts with the following characteristics Head countersunk maximum diameter 6 0mm 0 24in Thread maximum diameter 4 0mm 0 16in The screws must be tightened to a maximum torque of 0 5Nm 0 37lbfft Note Using rivets invalidates the warranty Overall dimensions of the motion sensor Dimensions of the mounting holes 20 5 mm 20 5 mm...

Page 19: ...exo com Page 19 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 All manuals and user guides at all guides com ...

Page 20: ...Product Manual Issue 4 ems100 www nexo com Page 20 All manuals and user guides at all guides com ...

Page 21: ...ameters Use as part of the controller password Selects menu options Selects parameters for change Use in the test routine Defrost Activates a manual defrost only applicable if temp is below termination temp Use as part of the controller password Use to de select menu options return Use in the test routine Up Scrolls up menus Increases parameter values Use as part of the controller password Increas...

Page 22: ...ing mode switching temperatures unless the saving temperature is disabled Saving temperature disable LED shows whether the saving mode temperature is disabled The cooler lights are off unless the light delay Ld parameter keeps the lights on for a short period after the controller switches to the saving mode The marketing mode Ar keeps the lights on for the duration of the saving mode Defrost mode ...

Page 23: ...sor failure Refer to Troubleshooting Temperature sensor alarms 3 5 GDC Firmware menus The table below describes the controller GDC firmware Sub menu Use the Up or Down buttons to scroll through the menu and the Set button to select Menu Display Description Parameter list Displays the parameters and the parameter values Test routine Enters the test routine that tests the relays temperature sensors ...

Page 24: ...dings there is a list for further options Selecting PS enters the parameter list and from here parameters and their values can be viewed checked and amended as required Selecting t St the test menu allows the three test routines to be carried out Unlike previous versions of the ems it is now possible to simply carry out the test required without having to perform all three Selecting Hr half re set...

Page 25: ...Press the Defrost button four times x 4 8 The display shows 3 8 Test routines tSt The test routine tests the following All load relays 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...

Page 26: ...sing the Up and Down buttons to scroll between tests Set to select the test required and Defrost to return to the test menu 3 8 2 The relay rEL test The relay test is used to test the function of the relays within the controller and can also be used to diagnose problems with the cooler components such as compressor and lights before beginning work on the cooler Step Action Display 1 From the test ...

Page 27: ...s Compressor relay disengaged Compressor stopped running and compressor LED is off Press Press Defrost to return to the relay test menu Follow the routine below for Light Action Button Display Test Check Press Light Press Select light Press Light relay engaged Cooler lights are on Press Light relay disengaged Cooler lights are off Press Press Defrost to return to the relay test menu All manuals an...

Page 28: ...n Press Fan relay disengaged Evaporator fan and the fan LED is off Press Press Defrost to return to the relay test menu Follow the routine below for Buzzer Action Button Display Test Check Press Buzzer Press Select buzzer Press Buzzer engaged Buzzer sound is on Press Buzzer disengaged Buzzer sound is off Press Press Defrost to return to the relay test menu All manuals and user guides at all guides...

Page 29: ...sonnel and repeated switching should be avoided due to inrush currents 3 8 3 The analogue input AnA test The analogue input test 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 Step Action Display 1 Press Defrost to return to the test menu 2 From the test tSt menu Pr...

Page 30: ...e analogue input test menu Press Door switch Press Door is open dO or closed CLO Opening and closing the door should make the display alternate between the two messages Press Press Defrost to return to the analogue input test menu Press Condenser sensor input Press Condenser sensor temperature Displayed temperature is as expected Press Press Defrost to return to the analogue input test menu All ma...

Page 31: ...ess For future use Stock sensing hardware currently unavailable 3 8 4 The motion sensor PIr test The motion sensor test checks that the PIR Passive Infra red sensor is picking up activity Step Action Display 1 Press Defrost to return to the analogue input test menu 2 Press Defrost to return to the test menu 3 From the test menu Press the Down button to scroll to the PIR input test All manuals and ...

Page 32: ...h detected movement The motion LED flashes for each detected movement Press Press the Defrost button to exit the test Press Press the Defrost button to return to the test menu 3 9 Viewing the last three cooler faults witnessed by the controller FLt It is possible to view the last three faults and understand problems that have occurred with the cooler Step Action Display 1 Press the Set button 2 Th...

Page 33: ...perators pressing the Down button 3 10 Half reset Hr Half resets 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 fr...

Page 34: ...d 4 Press the Set button three times x 3 5 Press the Down button once x 1 6 Press the Up button twice x 2 7 Press the Defrost button four times x 4 8 The display shows 9 Press the Down button to scroll to the half re set option 10 Press the set button to select the half reset option The display will alternate between Hr and nO 11 Press the Up button to change nO to yES 12 Press the set button to p...

Page 35: ...vity counts The controller then scrolls through the statistics pausing for 20 seconds at each statistic before returning to normal operation The 3 digit display can show values from 0 to 999 For values of 1000 and above the display shows the value as a rounded decimal number For example 1 1 represents 1100 1 2 represents 1200 and so on Display Statistic Description Activity frequency Value of the ...

Page 36: ...ounts since first powered up or last full reset Saving temperature disable Value of the standby temperature disable PEr parameter Possible values are OFF or ON OFF Saving temperature disable is switched off ON Saving temperature disable is switched on All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 37: ...er lights off in the 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 The limp home functionality has been added to the ems100 Nexo controller in order to allow time for the end user to contact a se...

Page 38: ...mal operation if DIS parameter is set to 0 the controller display will alternate between 5 In saving mode the controller display will alternate between 6 The compressor switches on when the SP set point and dIF differential are exceeded 7 The compressor runs for a maximum of twenty 20 minutes 8 The compressor switches off either after twenty 20 minutes or when the appliance sensor temperature has ...

Page 39: ...r than the time defined by the alarm delay Ad parameter If the door is closed and a door open alarm is registered this may indicate problems with the cooler door or the door switch Follow the chart to troubleshoot door open alarms on coolers with a door switch Ensure cooler door closed No No No See Alarms for further information Apply handheld activator magnet against the door switch Ensure area i...

Page 40: ...wiring and fuses Is controller on Is power available at the controller main connector Replace controller Is the compressor LED on Is compressor running Refrigeration system fault Is controller indicating a fault Power available at controller compressor connector See Alarms Is the controller in defrost dEF displayed Compressor fault No No Yes Yes Yes Yes No Yes No No Yes No No Replace controller Al...

Page 41: ...itted Is either sensor open circuit Yes Replace controller No Replace faulty sensor Yes Secure loose sensor Alarm cleared Fault cleared Yes No 4 6 Appliance sensor failure 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 des...

Page 42: ...ature falls below 0 C 32 F or if the appliance sensor fails Has the ambient temperature dropped below dtt freeze up protect No No Remove appliance sensor Yes Cooling switched off as per specification Replace controller Yes Change appliance sensor 4 8 Refrigeration system failure rSF alarms Refrigeration system failure rSF alarms trigger if the set point SP temperature is not reached within the tim...

Page 43: ...e buzzer is enabled In Ready mode In Saving mode 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 The fault clears and no...

Page 44: ...cuit Replace sensor No Ensure condenser area free from obstruction Reset alarm press Down button on the controller once Has Ht alarm cleared Yes Is the condenser fan running with the compressor Yes Is the Ht value set to correct value for cooler Yes Fault cleared No Wait until the temperature has dropped below the Ht value No Investigate fan problem No Manually set Ht to the correct value Reset al...

Page 45: ...Temperature Celsius or Fahrenheit CF Set point SP and Differential dIF Saving set point SSP Saving differential Sd and Saving temperature disable PEr Appliance sensor calibration 1 CA1 Operation Saving restart Sr Delay to saving mode dS Freeze up protection dtt Compressor rest time rt Defrost Defrost interval dE and Defrost duration dd Defrost termination temperature dtd Uninterrupted pull down IP...

Page 46: ...beeps of the buzzer The controller will display the clashing parameters when the back button is pressed just before byE is displayed and the controller reboots when exiting the parameter listings The controller will only display one broken rule at a time even if all rules are broken Priority order as above 5 3 Parameters definition 5 3 1 Set point SP Display Description Defines the compressor cut ...

Page 47: ...iance sensor Range 4 0 to 4 0 C 7 to 7 F Global default 0 0 C 0 F 5 3 4 Compressor rest time rt Display Description Defines the minimum time between compressor cycles The compressor rest time ensures that the pressures in the refrigeration system have time to equalize during compressor off cycles The compressor rest time rt helps to avoid the following passing peak current through the windings of ...

Page 48: ...to the Saving mode Considerations Set in multiples of 30 Should only take affect once Delay to saving dS has completed Range 0 to 120 minutes Global default 00 no delay 5 3 7 Saving restart period Sr Display Description Cooler runs at the ready mode temperatures for the duration of this period to ensure that the product is at the ready mode temperatures prior to retail outlet opening time Consider...

Page 49: ...on to set the EMS controller to Celsius C or Fahrenheit F Considerations A global reset sets EMS controllers using Fahrenheit F to Celsius C Applies to all temperature settings and values Range 00 C or 01 F Global default 00 C 5 3 10 Saving differential Sd Display Description Defines the compressor cut in temperature when added to the saving set point SSP temperature during the Saving mode Conside...

Page 50: ...pressor continuously until the product reaches the set point SP temperature During this time defrost cycles do not occur Considerations Must be set as follows Above the saving set point SSP plus saving differential Sd temperature Above the defrost termination dtd temperature Not used on Sub Zero version Range 0 0 to 60ºC 32 to 140ºF Global default 20ºC 68ºF 5 3 13 Freeze up protection dtt Display ...

Page 51: ...e defrost parameters Range 0 to 199 hours Global default 06 hours 5 3 15 Defrost duration dd Display Description Defines the maximum time of a defrost cycle Considerations If icing up occurs review the values of the defrost parameters Range 1 to 199 minutes Global default 15 minutes 5 3 16 Fan cycle on FCO Display Description Defines the active period of the evaporator fan while the compressor is ...

Page 52: ... not detect door openings therefore it does not Update the self learning matrix for door activity Manage the evaporator fan for door activity Sound door alarms if the door is left open Range 00 to 30 minutes Global default 00 disabled 5 3 19 Buzzer duration b1 Display Description Defines the duration of the buzzer for door open alarm conditions If the door remains open after the buzzer duration b1...

Page 53: ...s should the air temperature rise quickly due to a door opening Increasing the value for the display stability d2 slows the rate of change of the displayed temperature Considerations Use the global default value for normal operation Range 1 to 254 Global default 46 5 3 22 Low voltage LO Display Description Defines the minimum voltage allowed before switching off the compressor The low voltage LO v...

Page 54: ...allowed before switching off the compressor The high voltage HI values are 10 of the actual line in voltages see table below Considerations Must not be used with an external voltage stabiliser Must only be used with an Elstat supplied transformer Global default 0 disabled 110 120V line 220 240V line voltage HI voltage HI Disabled 0 220 22 120 12 230 23 130 13 240 24 140 14 250 25 260 26 270 27 Not...

Page 55: ...frigeration system by monitoring the condenser sensor On reaching the condenser high temperature Ht the controller disables the compressor and activates an alarm Considerations Is not used with CO2 R744 coolers Requires a condenser sensor To set the condenser high temperature Ht measure the refrigeration system temperature when the condenser is 75 blocked To disable set below 50ºC or 122ºF Range 0...

Page 56: ...our period the controller restarts the 48 hour period The controller must complete the 48 hour period to determine the activity frequency before starting the 1 day or 7 day learning period 5 3 27 Fan set point FSP Display Description Prevents excessive condensation on the evaporator in environments where warm and presumed humid air is present by operating the evaporator fan If the fan set point FS...

Page 57: ...d Range 00 disabled or 01 enabled Global default 01 enabled 5 3 29 Saving temperature disable PEr Display Description Disables the saving mode temperatures so that the controller maintains the Ready mode temperatures at all times Disabling the Saving mode temperatures does not affect the light functionality Considerations None Range 00 off or 01 on Global default 00 off 5 3 30 Learning period LP D...

Page 58: ...iption Sets the cooler lights to remain on at all times for display purposes The coolers lights will remain on during saving mode Considerations Does not affect saving temperature Range 00 off or 01 on Global default 00 off 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 Considerations Input will still be operat...

Page 59: ... 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 FCC Part 15 107 15 109 Electromagnetic Compatibility EMC EMC EN55014 1 EN55014 2 EN61000 6 1 EN61000 6 3 EN61000 3 2 EN61000 3 3 European Telecommunications Standards Institute ETSI EN301 48...

Page 60: ...784 87 European Telecommunications Standards Institute ETSI EN300 328 V1 8 1 Federal Communications Commission FCC Part 15C 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 Fo...

Page 61: ... terms The table below describes the meanings of some of the terms used frequently within the manual in relation to the controller and accessories Term Meaning Ready mode The cooler is operational and cooling products to the set point Saving mode The cooler is saving energy and cooling products to the saving set point Appliance sensor A sensor which measures the temperature inside the cooler cabin...

Page 62: ...tion 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 www elstatgroup com All manuals and user guides at all guides com ...

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