H3R7000技术资料(英文)

INTRODUCTIONREVISION PAGESINDEXREVISIONDATE MODIFICATIONA A 02/10/2010Document creationBPE section of the documentCONTENTSThis document contains 66 pages divided into 6 sections and numbered in accordance with the table below: SECTION PAGE DATE IND SECTION PAGE DATE IND SECTION PAGE DATE IND00 00 00 00 001 1 1 1 1 1 1 1 1 12 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2123451123456789101234567891011121314151617OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA34444444444444444112345678910111213141516OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10OCT10AAAAAAAAAAAAAAAAATABLE OF CONTENTSSection 00Introduction 1 Revision pages 1 Contents 2Table of contents 3.5Section 00. GENERAL INFORMATION10.1 Purpose and use of the equipment10.2 List of approved and non-approved equipment1Section 11.DETAILED DESCRIPTION OF THE EQUIPMENT11.1 General characteristics 11.1.1Mechanical properties 11.1.2Electrical ratings11.2 Detailed description of the condenser21.2.1Detailed description of the front of the condenser21.2.2Detailed description of the back of the condenser31.3 Functional description of the condenser 41.3.1 Functional description of the front elements of the condenser 4 - 51.3.2 Functional description of the rear elements of the condenser 61.3.3 Operating principle 71.3.4 General outline of the condenser 81.3.5 Electrical nomenclature 91.3.6 Electrical functional description 91.3.7 Circuit diagram10Section 22.OPERATION1 2.0 Steps to be taken 12.0.1 Prior to first use and set-up by the manufacturer 1 2.1 Normal operation procedure 12.1.1 Start-up procedure 12.1.2The usage menus 2 -13 2.1.3Shut-down procedure 14 2.1.4Start-up procedure after shutdown during the operating cycle 14 2.1.5Start-up procedure after an error or modification 14 2.1.6 Monitoring procedure authorising full load output capacity 15 2.1.7Safeguarding procedure during shutdown 15 2.2 Procedure to be followed in case of an accident 15 2.2.1Steps to be taken if the device does not cool down 15 2.2.2Steps to be taken if the device does not work 16 2.3 Periodic testing procedure 17not applicableSection 33.MAINTENANCE1 3.1 List of replaceable parts 1Not applicable3.2 Special tools and particular handling equipments 1Not applicable3.3 Tools and procedure for handling 13.4 Storage conditions 13.5 Preventive maintenance 1Not applicable3.6 Regulatory visits 13.7 Safeguarding of the equipment during shutdown 1Section 44.PLANS4.1 List of diagrams supplied by the manufacturer 1Not applicable4.2 List of plans, appendices and terminology in the RMM 14.2.1Terminology 2 - 34.2.2Text file example of samples saved on a USB flash drive 44.2.3Text file example of a stored sample on a USB flash drive 54.2.4Replacement of the printing paper roll 6 - 74.2.5Safety data sheet of refrigeration gas 8 - 134.2.6Technical specifications plan of the front of the condenser 144.2.7Technical specifications of the back of the condenser 15TRITIUM CONDENSER T160 02.10.10/AP : 1/10. GENERAL INFORMATION0.1 Purpose and use of the deviceThe device which the present G.E.E. (reference and maintenance manual) refers to is a tritium sampler called H3R 7000 which traps atmospheric tritium. It draws in the air in a room or in an environment through a cold trap and reheats it to transform the frost to water.This device is mainly used for low concentrations of tritium (vapour) in the atmosphere.The sampling requires about one hour and can be broken down into two parts:-50 minutes for the trapping and the recovery of the tritiated water sample in a flask.-10 minutes for the drying process and preparation for taking the following sample.The purpose is to collect a sampling in the flask of the beta activity concentration representative sample of the air to be checked over a very short period of time.The sample is labelled for purpose of identification and sent to a laboratory for a scintigraphicalanalysis.This documents presents the integral elements of the H3R 7000, its normal commissioning as well as the operations to be performed for its maintenance.TRITIUM CONDENSER T160 02.10.10/AP : 1/101. DESCRIPTION OF THE EQUIPMENT1.1GENERAL CHARACTERISTICS1.1.1 MECHANICAL PROPERTIES-Single shell frame in aluminium alloy.-Front sides (control panel) encased in anti-scratch LEXAN.-Body painted in leather-grain gentian blue RAL 5010.-Epoxy polyester paint.-Weight 15kg-Carried using 3 handles.-Dimensions length 576mm Width 390mm Height 423mm.1.1.2ELECTRICAL RATINGS-Supply voltage 230v AC (-10% + 15%) 50 Hz.-Power 1200w.-Circuit-breaker 6A switch-rated 30 mA.-Power input on filtered socket in conformity with CEI 950.Désignation / typeCode article 016Désignation / typeCodearticle 050051053052503010015110054203120403AP1300KIT13411203341240334125033731001502002134096528768780587121577712864CSTM WG 340010431493006033413603Carrying handles Feet out of rubber Sampling flask 125mL USB baseRef.Ref.Protective cap USB Indicator USB LCD graphic displayPushbutton of order PrinterHumidity and temperature sensor Flask stand Ventilation grate Filter cartridge Flask grate1.2 DESCRIPTION OF THE CONDENSER1.2.1 DESCRIPTION ON THE FRONT OF THE CONDENSER0550561150130421493287234501040579931901BDésignation / typeCode article Désignation / typeCode article 111DLKSDS105Circuit breaker+switch rating of 30mA Mains power supply Time-delay fuse 6,3A F1TCooling block ventilator Descriptive labelRef.Ref.1.2.2 DESCRIPTION ON THE BACK OF THE CONDENSER1.3 FUNCTIONAL DESCRIPTION OF THE CONDENSER1.3.1 FUNCTIONAL DESCRIPTION OF THE COMPONENTS ON THE FRONT OF THE CONDENSER- The carrying handlesEach device is equipped with 3 carrying handles. These handles can be used for the transportation of the device by 2persons.ATTENTION: do not tilt the condenser by more than 15°, otherwise there is a risk of deterioration for the chiller.- LCD graphics displayThe graphical display displays the various parameters of the operating condition of the device. Backlighting enables the display to be read in the dark.- The push control buttonsThe control buttons S1 - S2 - S3 give access to various functions and interact with the display.- The humidity and temperature sensor module The RH-T°C module contains a highly sensitive digital sensor integrated in a ventilated tube to avoid deviations. it transmits the information to the PCB to display the absolute humidity in g/m 3.- The USB lightThe flashing of the red LED light during the operation of the condenser indicates that the temperature and humidity parameters are stored every minute on the USB flash drive.- The USB base and its protective capThe USB connector allows for the USB flash drive to be connected in case the user wishes to record the information on a USB flash drive at the end of a cycle.- The printerThe printer prints an adhesive identification label of the sample that will be placed on the flask at the end of sampling.- The ventilation grate and filter cartridgeThe stainless steel ventilation grate is the entry of air drawn in by the exchanger fan ; make sure to leave sufficient space in its surrounding environment. The filter cartridge allows for anti-dust protection to be installed.- The flask standThe sampling flask stand is made of stainless steel; it is a sliding-drawer system which allows for the flask to be positioned under the condensation collector tray.- The sampling flask1.3.2FUNCTIONAL DESCRIPTION OF THE COMPONENTS AT THE BACK OF THE CONDENSER- The mains power supplyThis is the electrical current input, this unit contains:-The sector power supply unit, called power socket which allows for the device to be powered with the aid of the power cord supplied along with the condenser.- the EMC mains filter, which reduces the level of interference created by the components of the condenser and emitted by the network in conformity with the standard EMC EN 55022/B.- The main switch M/A, its main function is switching on and shutdown of the electronic control card and its subassemblies (display, fan and chiller). It is placed in front of the differential circuit-breaker.- The fuse holder equipped with a 6.3A time-delay fuse F1T 5x20 green tube to protect the electrical elements. - The circuit-breaker with switch rating of 30mAThe circuit-breaker 6A MERLIN GERIN is coupled to a differential switch 30mA ; it protects the user against electrical defects on the inside of the condenser in conformity with the standard NFC 1500.- The cooling block and ventilationThe fan works by suction and rejects the air through the rear airing plates that passes in the fins of the exchangers. This zone as well as the air inlet should compulsorily be at a minimum distance of 25mm from a partition. The chiller has a refrigerating capacity of 270w and an electric power of 770w. It works with the refrigerant R 404A (see safety sheet on page 8 to 14, section 4).- descriptive labelIt allows for the device, the manufacturer and serial number as well as the date of manufacture to be identified.1.3.3WORKING PRINCIPLESThe cooling system's ventilator on the front side, optionally fitted with a dust filter holder The compressor on the plates of the heat exchanger n°1.This water vapour is transformed into ice and accumulates on the plates during the 4 way solenoid valve in the funnel .1.3.4GENERAL LAYOUT OF THE CONDENSERReference document / RevSDEC FranceREFERENCE AND MAINTENANCE MANUALTRITIUM CONDENSERT160 02.10.10/ASECTION1P : 9/10 1.3.5 ELECTRICAL PARTS LISTMARKINGS NAME AND DESCRIPTION MANUFACTURERCODE 050Panel assembly cable USB/A 0.8m MOLEX9652876051Anti-dust cap 847000003MOLEX87805870525mm built-in red LED light MENTOR1215777053Graphical display WINSTAR WG12864C – TMI WINSTAR WG12864C054Touch button IP67ITW31493000556A circuit-breaker + 30mA differential switch SCHNEIDER0130421056Power supply unit 250v 6A SCHURTER4932872057Time-delay fuse 6.3A 5x20 green tube SCHURTER9,931,901B058Sensor T-RH SHT75 1590514SENSIRION1590514062Condenser control card 3400104SDEC3400104063Power supply unit HB5-3/OVP-AG POWER ONE1208815064Switch mode power supply unit 9/36w POWER ONE06854048080Silicone heating resistor 230v 180w ALPER3430114081Heating resistor 130031 230v 1kw EBM PAPST1300310824-way Solenoid valve 1115011DANFOSS1115011083220-240 50Hz coil 1115021DANFOSS1115021110Printer AP1300KIT1ALKA AP1300KIT1 111230v fan 37700/200PLACET DLKSDS105 112Tangential turbine QLK45/2400A32EBM PAPST4349832113Fan 82AV-1305-200-28NMB092210170114Fan 82AV-1305-172-34NMB092210140115Fan 40x40 5v 121-7968SEPA12179681.3.6 FUNCTIONAL DESCRIPTION OF ELECTRICS- The control circuit boardThe circuit board manages the operation of the cooling block, the 4-way valve, the ventilation, the heating and theinformation provided by the humidity and temperature sensor. It is equipped with a microcontroller with flash memory, of- The displayThe display acts as an interface between the user and the device. It displays the information originating from the circuit board. It is a backlight LCD graphical display which interacts with command keys S1 -S2 - S3.1.3.7Fuse 6,3ACircuit breaker +differential switch Mechanical earthingELECTRIC DIAGRAM OF THE CONDENSERVentilator exchangers30 mA2. OPERATION2.0 - STEPS TO BE TAKEN2.0.1 Prior to first use and set-up by the manufacturerCheck that the device has not been tilted during its transport, otherwise leave it standing for 8 hoursCheck that the device is placed on a horizontal workspace and at a minimum distance of 300mm from a partition.2.1- NORMAL OPERATION2.1.1- Start-up procedure.- Preliminary- Connect the power cord to the device and to a mains socket 230v/16A.- Check that the sampling flask is on its stand.- Switching on the equipment.- Put the circuit-breaker located at the back right of the condenser in the ON position.- Switch the On/Off switch at the back left of the condenser to I.- Operation check- Check the displayThis is the first display while switching on; it remains for 3 or 4 seconds, which is the time ittakes for the device to be initialised. In the top right corner, the device number appears (no.0012 in the example).This is the second display; it is displayed continuously while awaiting a command.- If the operator wishes to start the standard cycle, he presses the S2 key.- Or if the operator wishes to go to the settings menu, he presses the S3 key.2.1.2 The user menusThe standard menu mode.The device is set in factory to operate in a standard sampling mode with the saved parameters.These parameters are the result of several tests conducted by the French Navy, the French Institute for Radiological Protection and Nuclear Safety (MARINE, IRSN) and by our laboratory. The cycles guarantees sampling under normal conditions; in other words, a relative temperature and humidity of:T°C = or > 0°C and RH = or > 5g/m3.PRESS S2 BRIEFLYThis is the third display; the cooling block compressor starts up.The display shows the day, hour, sampling number (004) and the water quantity ingrams/m3 contained in the surrounding air at the time of sampling, and the name of thecurrent cycle (sampling) is shown at the bottom of the display. It also shows the remainingduration of the cycle in figures (26min. 18s.) and graphically, the clock hands moveanticlockwise (from right to left), is displayed as a countdown.It is the fourth display, the trapping has finished, the inversion cycle of solenoid valve isstarted. The exchanger is reheated and the accumulated frost melts and flows into thesampling flask. The display shows the heating in process and the remaining duration ofthe cycle, is displayed as a countdown.This is the fifth display, the condensation water is in the sampling flask.The cooling block is stopped; the exchangers and the condensation collector are dried toprevent the possibility of drops of water remaining. Potential drops of water remaining inthe exchangers and the condensation collector. The display shows drying in progressand the remaining duration of the cycle, is displayed as a countdown.This is the sixth display, the sampling cycle has finished, the printer prints the sampleidentification label. The display prompts the operator to remove the flask from the deviceby pulling the sliding support. It indicates the number of the sample (in the example0004), after this it is necessary to switch the device off using the switch at the back leftside. After having torn off the label from the printer, affix it on the flask. The label isadhesive but can be removed and restuck in case it is badly positioned.Description of the label- the number of the device no. 0004.- the number of the sample no. 0006.- The date and time of the start of the sampling- the quantity of water in the ambient air at the start of the sampling.- the date and time of the end of the sampling- the quantity of water in the ambient air at the end of the sampling.Description of the printerTO CHANGE THE ROLLSEE IN SECTION 4TRITIUM CONDENSERT160 02.10.10/AP : 4/17 SEQUENCE OF STANDARD SAMPLING CYCLEThe settings menu.To go to the settings menu, press S3 at the level of the start-up display; this menu will give access to the settingssubmenus listed below:- Expert modeThis menu allows you to regulate the duration of the sampling cycle.- ProgrammingAllows you to program a deferred start-up of the sampling.- DateSetting of time and date.- USBAllows you to activate the save option on a USB flash drive. This allows the user to save the logbook of the device with the last hundred samples. (see listing in section 4)- StorageGives access to the reading of the storage of the samples and allows you to save the data of sampling on a USB key, if required. In fact, every minute of recording, the T°/ RH sensor transmits information about the quantity of water in the ambient air during the sampling in absolute values. (see listing in section 4)- MaintenanceThis menu can be accessed only by the manufacturer.STANDARD SAMPLING 1 HOURCOOLINGTRAPPINGSAMPLINGCONDENSATIONPREPARATIONSUBSEQUENT SAMPLING NORMAL CHILL CYCLEINVERSION OFCHILL CYCLENORMAL CHILLCYCLEPRINTINGLABELVENTILATEDHEATINGDRYING OFCONDENSATIONTRAY CORE TIME 43min.SET 5min.SET 10s.SET 5s.SET 10min- COMPRESSOR- FANCHILL- FANCOMPRESSOR- COMPRESSOR- FANCHILL- FANCOMPRESSOR- 4-WAY VALVE- COMPRESSOR- FANCHILL- FANCOMPRESSOR- PRINTER- FANCOMPRESSOR- TURBINE- THERMALRESISTOR- FANCOMPRESSOR- TURBINE- RESISTOR TRAYTRITIUM CONDENSERT160 02.10.10/AP : 5/17 Synopsis of the settings menurtmdryingThe expert mode menu.PRESS ON S3 BRIEFLYThis is the first display of the settings menu after pressing briefly on S3 (>) from the start-up display, the user can access expert mode by pressing the S2 button for OK.PRESS S2 BRIEFLYThe second display requests the access code; this code is saved in the deviceparameters at in factory. To enter these, use the buttons S1 (-) and S3 (+), then confirmeach number with the button S2 (OK).After the code is entered, press the button S2 (OK) to enter the expert menu.In case of error, the display indicates CODE ERROR and will return to the previousdisplay.PRESS S2 BRIEFLYThe display requests the desired duration of the sampling; i.e. the time during which thecold trap is in operation. Following the same principle, use the buttons S1 (-) and S3 (+),then confirm with the button S2 (OK). The maximum duration is 60 minutes.PRESS S2 BRIEFLYThe display requests the desired duration of the heating; i.e. the cycle inversion time ofthe cold trap which becomes hot and melts the ice on the fins of the exchanger. Use thebuttons S1 (-) and S3 (+), then confirm with the button S2 (OK). The maximum durationis 10 minutes.PRESS S2 BRIEFLYThe display requests the duration of the drying of the condenser and the condensationcollector tray; this is the time during which the thermals resistors are operationals and thetangential turbine dries up the fins of the exchanger. Use the buttons S1 (-) and S3 (+),then confirm with the button S2 (OK).The maximum duration is 20 minutes.PRESS S2 BRIEFLYReturn to the start-up display, the duration of the sampling cycle has been taken intoaccount according to the parameters modified in expert mode, in the example 1Hr10min. The maximum duration of a sampling cycle in expert mode is 1Hr 30 min.Press thebutton S2 to start-up the sampling cycle or S3 to return to the settings menu.SEQUENCE OF THE EXPERT SAMPLING CYCLE.The programming menu.This is the first display of the programming menu; press the button S2 (OK) to enter the menu.PRESS S2 BRIEFLYThe second display requests the date and time of desired start-up, use the buttons S1 (-)and S3 (+) to increase or decrease the parameters and confirm with the button S2 (OK).PRESS S2 BRIEFLYThe third display indicates the date and time that the deferred start-up was saved and the requested date and time for the start of the sampling. The time elapses and counts down to zero.SAMPLING IN EXPERT MODECOOLING TRAPPING SAMPLING CONDENSATION PREPARATIONSUBSEQUENT SAMPLING NORMAL CHILL CYCLE INVERSION OF CHILL CYCLE NORMAL CHILLCYCLEPRINTING LABEL VENTILATED HEATINGDRYING OF CONDENSATIONTRAYADJUSTABLE RANGE1 to 60min.ADJUSTABLE RANGE 1 to 10min.SET 10s.SET 3s.ADJUSTABLE RANGE1 to 20min.- COMPRESSOR - FAN CHILL - FANCOMPRESSOR- COMPRESSOR - FAN CHILL - FANCOMPRESSOR - 4-WAY VALVE- COMPRESSOR - FAN CHILL - FANCOMPRESSOR- PRINTER- FANCOMPRESSOR - TURBINE - THERMAL RESISTOR HEATING- FANCOMPRESSOR - TURBINE- RESISTOR TRAYAUTOMATIC START-UPThe fourth display indicates that sampling is in progress, the device starts up and samplingcommences. THE DEVICE TAKES THE LAST MODE INTO ACCOUNT SAVED BEFORETHE DEFERRED START-UP.The fifth display indicates the end of the sampling as in the standard cycle, stop the deviceand remove the flask with its label.The date settings menu.PRESS ON S3 BRIEFLYAfter briefly pressing S3 (>) from the expert menu, the date menu appears; press thebutton S2 (OK) to enter the menu.PRESS S2 BRIEFLYTo set the date and time, use the buttons S1 (-) and S3 (+) to decrease or increase thevalues and confirm every number with the button S2 (OK).After confirming the minutes, press briefly on S2 (OK) and you will return to the datesettings display. To return to the start-up, press the button S1 (<) until the display returnsor press S3 (>) to continue in the settings menu.The USB menu.PRESS ON S3 BRIEFLYAfter briefly pressing S3 (>) in the date settings display, you will arrive at the USB menu.This menu will give you the possibility of confirming the option of saving data on a USBflash drive.This option allows you to record relative humidity in g/m3 every minute duringthe upcoming sampling.PRESS S2 BRIEFLYAfter briefly pressing the button S2 (OK), the display asks you the questionno/yes, use the buttons S1 (no) or S3 (yes), then confirm your choice with S2 key, if youchoose no, you will return to the settings menu on the previous display.ATTENTION: IF YOU AGREE TO THE USB OPTION, THE DISPLAY WILL PROMPTYOU FOR THE FLASH DRIVE TO START UP THE SAMPLING CYCLE.PRESS ON S3 BRIEFLYPress briefly on S3 = yes,PRESS S2 BRIEFLYReturn to the settings menu.The sampling storage menu.PRESS ON S3 BRIEFLYAfter briefly pressing S3 (>), you will reach the storage menu. This menu allows you tosearch for a sampling in the memory, either by number or by date, and to display it.It also allows you to save the device log with the status of the last hundred samples (seelisting of storages in section 4)PRESS S2 BRIEFLYAfter briefly pressing S2 (OK), you enter the storage menu, the display indicates thesample number (no. 0018), by pressing the button S1 (<), you can go back up to no.0001. The starting date and time and end date and time of every sampling is indicated.The device stores the hundred last samplings in its memory, but the numbering can goup to 9999.PRESS S2 BRIEFLYIf you wish to save the device log (see listing in section 4), the display asks whether youwant to save it on a USB flash drive yes or no. Press S1 (<) for no and you return to thestorage menu display. Press S3 (>) for yes.PRESS ON S3 BRIEFLYPress briefly S3 (>), and the display will request you to insert the USB flashdrive.INSERTING THE USB FLASH DRIVEThe device detects the flash drive and informs the user to wait for a fewseconds.The device shows the rest of the usable memory on the key in million octets orin giga octets according to the capacity of the USB key.Saving begins and the user is informed of the progress of the saving by a graph.You are automatically returned to the storage menu after it has finished saving.The Maintenance menu.PRESS ON S3 BRIEFLYAfter briefly pressing S3 (>), you will reach the maintenance menu; this menu isreserved for the manufacturer. To access it you need an input code, which isnot provided with the device.TRITIUM CONDENSER T160 02.10.10/AP : 13/17PRESS S2 BRIEFLYThe user presses the button S2 (OK), the display will ask for the code, to leave thismenu, it is enough to stop the device with the On/Off button on the back left and torestart it, the device returns to the start-up display.If the user enters the incorrect code, it will show CODE ERROR and will return to themaintenance menu display.The Return Menu.After pressing S3 (>) from the maintenance menu, you will reach the return menu.By pressing the button S2 (OK), you will return to the start-up display.PRESS S2 BRIEFLYThe start-up display appears; pressing S2 (OK) starts the sampling in the standard modeby default or in expert mode if the user entered the expert mode menu.2.1.3 - Shut-down procedure.It is possible to stop the device at any time during its operation.- to stop the condenser, press the On/Off button on the back left side of the device.2.1.4 - START-UP PROCEDURE AFTER THE STOP DURING AN OPERATING CYCLE.After power-off recycle:- Switch over the On/Off switch at the back left of the condenser to I.the device takes back its sampling in progress and the display indicates resuming sampling, after a few seconds the sampling display appears and the device resumes its cycle from the point where it had stopped.The display indicates the resumption of the sampling.After approximately three seconds, the sampling in progress display appears at the sametime as the device starts up.2.1.5 - START-UP PROCEDURE IN CASE OF AN ERROR OR MODIFICATION.After power-off recycle:- Switch over the On/Off switch at the back left of the condenser to I.- As soon as the display lights up, press the button S2 for 3 seconds and the display will return to the start-updisplay. It is a RAZ (reset) of the parameters of the current operation.Press S2 for 3 seconds after the display lights up.The display returns to start-up.2.1.6 – MONITORING PROCEDURE PERMITTING FULL OPERATIONAL CAPACITY.- Display of the parameters on the display:Duration of current sampling.The name of the current cycle.The water quantity in g/m3.- Cooling block in operationAppearance of ice on the fins of the exchanger after a few minutes' operation.2.1.7 – SAFEGUARDING PROCEDURE DURING SHUTDOWN.- Short period of up to 48 hours.Not applicable- Long period of more than 48 hours.Place the guard plate on the air intake grate to avoid the deposition of dust on the fins of the exchanger; this deposition could result in the accumulation of contamination.2.2 – PROCEDURE TO BE FOLLOWED IN CASE OF AN ACCIDENT.2.2.1 - Steps to be taken if the device does not cool down.- The device is working, there is a display, the cooling block compressor works but there is no refrigeration; there is no ice on the fins of the exchanger.。