TRENDvent Service ENG_2015-02-04_09.indd
Contents
1. 25 8 FUNCTIONAL TEST A CAUTION Until all tests have been passed the device must not be used The tube system and a test lung are required for the functional test 1 Connect the tube system and the test lung to the ventilator 2 Connect the device to the mains power 8 Switch the ventilator on 4 Start ventilation by pressing the ON OFF key 8 1 CHECKING THE ACOUSTIC ALARM Switch the ventilator on using the main switch on the rear of the device A signal must sound 8 2 CHECKING THE ALARM BUTTON LIGHT After the device is started it carries out a self test of the alarm button The button must light up in the following order white gt red gt yellow gt white The light subsequently goes out 8 3 CHECKING THE DISPLAY Switch through all screens in the physician and patient mode and check that all display elements are present and legible and that the display s lighting is functioning If necessary check the Con trast and Brightness settings 8 4 CHECKING THE STATUS SCREEN FOR ERRORS When the device is started it carries out a self test If any errors are detected the status screen is automatically displayed Faulty parameters will be displayed by ERROR Possible errors must first be corrected before the device can be used 8 5 CHECKING THE DATE AND TIME Switch to the comfort screen and check the date and time If necessary correct the setting 8 6 CHECKING THE BATTERY OPERATION2. PCB Controller control and operating unit n Humidifier Blower gt system Internal q Y battery gt lt gt Sensors Valves Oxygen supply Controls Display Figure 15 Block diagram of entire device 5 2 BLOWER The blower provides a maximum pressure of 40 hPa at a flow of 200 l min It is installed in a sound insulated box On the air inlet side there is an air filter cassette with a coarse and a fine filter 5 3 PCB DC COMMUNICATION The DC communication printed circuit board enables the connection to the external power supply power supply unit or battery pack via the power interface as well as the connection of accesso ries remote alarm PC via the communication interfaces RS232 USB2 0 The appliance switch is also located on this PCB Furthermore the PCB also accommodates the motor controller with the accompanying block com mutation circuit A reed switch switches between the respiratory therapy and ventilation modes 5 4 SENSORS VALVES DISTRIBUTION OF THE COMPRESSED AIR For the distribution of the compressed air the device is composed of the following units e Blower 40 hPa at 200 l min e Air outlet standardized tube connector M22 with flow element and proportional valve e Check valve e Control valve e Oxygen block including 3 2 directional valve and self locking connection e Pressure measuring tube connection 3 5 mm e Control pressure tube connection 4 5 m
3. ALARM Remove the device from the mains power An alarm must sound and the message Battery Opera tion must appear in the display 8 7 CHECKING THE LEAKAGE ALARM Remove the test lung from the device After at most 15 seconds an alarm must sound and the message Leakage must appear in the display 8 8 CHECKING FREQUENCY TOO HIGH ALARM Connect the test lung to the TRENDvent Change to the physician mode and select PSV as the ventilation mode Set the frequency to 12 bpm and the alarm parameter Max Frequency to 20 bpm Start ventilation Simulate an increased respiration rate by squeezing the test lung until the alarm sound is triggered and the message Frequency too high appears on the display 26 9 DEVICE SETTINGS TESTS 9 1 FLOW SENSOR CALIBRATION The flow sensor calibration should be carried out as part of the annual maintenance or after the repair of relevant components This can be done automatically or manually IMPORTANT The flow sensor calibration should be carried out with a flow resistance of 7 mm 9 1 1 MEASUREMENT SETUP HOFFRICHTER i O Wum o Ge Airflow Pressure Meter APM ni 7 RS232 m cable Adapter for flow sensor calibration Flow sensor Airflow resistor 7 mm Figure 16 Measurement setup flow sensor calibration 9 1 2 MANUAL FLOW SENSOR CA
4. C4 Oxygen valve A1 Front panel blue brown red green grey white black no color no color 1 incl sinter element m PO l xio Figure 12 Tube connecting plan for devices up to serial number CAI1300550 4 11 TUBE CONNECTING PLAN 4 11 1 FOR DEVICES AS OF SERIAL NUMBER CAI1300551 E5 Holder flow element A16 Bellows E9 Proportional C6 Control air outlet C4 Oxygen valve A1 Front panel blue brown red green grey white black no color no color 1 incl sinter element m PO l xio Figure 13 Tube connecting plan for devices as of serial number CAI1300551 5 IMPORTANT COMPONENTS The TRENDvent ventilator comprises the following components e Blower e PCB DC communication e Sensors valves compressed air distribution e Power supply e PCB Controller control and operating unit e Interfaces 5 1 BLOCK DIAGRAMS 5 1 1 BLOCK DIAGRAM OF COMPRESSED AIR DISTRIBUTION Air inlet Filter A A Check Switch valve Blower Pressure sen O2 valve Flow sensor y sors excess 4 Proportional Pressure valve switch 4 Control valve Oxygen Air outlet Control tube Pressure connection connection measuring tube connection Figure 14 Block diagram of compressed air distribution 5 1 2 BLOCK DIAGRAM OF ENTIRE DEVICE Switching P power supply emote alarm N 100 240 V AC Nurse call Accessories PC 20 10 i i PCB DC communication
5. Changing the 9V rechargeable battery usnnsseeeennsssseeeennnnnneeennnnnn een nnnnenennnnnenen nn 22 Changing the batteries asus inenen eanna EE ask aan nn anni hen SERT pen 23 Changing the Miters srren een are E Ee e arena en 23 Exchanging the blower box eussssesseennnseennnennneennennnnenennnnnnnnnnnsnnnnennnsnnnn nenne eE EE 23 Assembling and closing the device umssssssennnnnseeeennnnneneeennnnneneeennnnneee nennen nr 25 FUNCTIONAL LOSE esien duveredatvanias sbaiedacdeas ehe peter ne nenne iR nase 26 Checking the ACOUSTIC alarm s rsssessensseeneennnnnnnnennneennnnnnnennnennneenennnnnernnnnnsnnnnnen nn 26 Checking the alarm button light 2 0 0 cececccceceeeeeceeeeeeeeeeceeaeeeeeeeeaaeeeeeesaaeaeeeeeesseeeseeeeees 26 Checking the display 2 0 0 2 ceeececeeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeeeeeaeeeeeeseaeeeeeeeseeeesereeeees 26 Checking the status screen for erforS uesseeeeesssasseeeennnnneneennnnnneeennnnnnennnnnnnnnnnnnn nennen 26 Checking the Battery operation alarm unsseeeennnssseeeennnnneeeennnnen een nenne nenn nennen 26 Checking the IE R ame arneeaegeneeeneee 26 Checking Frequency too high alarm sssssssseennnssseeeennnsneeeennnnene nn nnnnenennnnnnnen nn 26 Devise sellingsflesB an ae ea 27 Fow sensor CAMA OM yiisincsstacneesegusscaceaenemnnanebnd on aan nn E E a nina neh hr see anhand 27 Measurement SCtUD ccccccceceeeceeeeee
6. 5 4400 0027 E Seal air outlet 42100222 E8 Humidifier unlock key without spring 0001 4140 E6 E9 Proportional valve with spring connectors assembled 24 V 0001 4107 up to serial number CAI1300550 E6 E9 Proportional valve with spring connectors assembled 12 V 0001 4127 as of serial number CAI1300551 E10 Spring for humidifier unlock key 0 6x 4 5x 15 41000102 33 Pos Designation Article number Fi Housing for internal battery pack 4210 1006 E2 2x screw 2 2x 6 5 DIN 7981 F3 PCB battery charging 0001 4330 F4 Internal rechargeable battery pack Li lon without PCB battery changing 1600 0015 and housing 1 set Filter cassette closed with filters 0000 2058 Ribbon cable 24 pol for operation panel 3220 0089 Cable flow calibration assembled 0001 4112 Sinter element 41000173 Tube set inner with tube connecting plan up to serial number CAI1300550 0001 4108 Tube set inner with tube connecting plan as of serial number CAI1300551 0001 4125 Buchse f r Sauerstoffanschlusskabel 0001 4136 Rechargeable battery 9 V 1600 0017 Pressure switch 60 mbar 2300 0036 Lithium battery cell CR2032 3V 1600 0004 Assembly set flow element E4 2x seal E3 holder flow element fastening 0001 4147 element E5 fixing base and cable tie Maintenance kit 1 0001 4984 Maintenance kit 2a 0001 4985 Maintenance kit 2b 0001 4987 Maintenance kit 5 0001 4986 Replacement kit 1 up to serial number CAI1 300550 0001 4988 Replacement kit 2 up to s
7. arm 0001 4109 A6 Housing upper part complete without label band 0001 4102 A7 Bellows air inlet straight 4210 1032 A8 Back part assembled with PCB DC communication 0001 4328 A9 PCB controller 0001 4143 A10 Side housing part with handle 0001 4139 A11 Internal rechargeaable battery pack with housing and PCB 0001 4333 battery charging A12 Housing foot single 4400 0073 A13 4x lens head screw M3x8 for housing DIN 7985 4300 0072 A14 Housing lower part complete with housing foots and rating plate 0001 4101 A15 Cover check valve 4210 1009 A16 Bellows air outlet angled with cable tie 0001 4146 B1 Label band TRENDvent HOFFRICHTER 2200 0098 B2 Operation panel with sealings and nuts 0001 4145 B3 Seal operation panel 179x1 4 BA Display 15200018 B5 3x screws M2x3 DIN 7985 B6 Housing upper part 0001 4102 C1 Front panel without O2 block 0001 4104 C2 Piezo signal transmitter with PCB and cable 0001 4118 C3 O2 block 0001 4137 C4 O2 valve with cable assembled 0001 4105 C5 O2 connector 41000171 C6 Control valve 0001 4150 D1 PCB DC communication 0001 4327 D2 Back part without PCB DC communication with sticker Warning hints 0001 4103 D3 Holder for filter cassette 4210 1005 D4 Filter cassette open with filters 0000 2038 D5 Cover for connectors 4210 1035 D6 DC port 32100041 D7 Main switch 82100040 D8 Seal back part D9 4x lens head screw 2 2x6 5 DIN 7981 Bil Air outlet with spring connectors glued 0001 4133 E2 O ring 35x1
8. battery pack K8 e Cable control valve K9 e Cable humidifier connection E6 e Motor cable K10 7 6 CHANGING THE 9V RECHARGEABLE BATTERY The 9V rechargeable battery is included in the Maintenance kit 1 and should be changed annually Change the 9V rechargeable battery after the device has been disassembled as follows Cut the cable tie 2 Remove the 9V rechargeable battery from the holder Insert a new battery Ni MH HR 8 4 V 200 mAh IMPORTANT Ensure that the polarity and the fit in the holder are correct 4 Affix the 9V rechargeable battery to the PCB controller A9 using the cable tie 142 mm included in Maintenance kit 1 Cut off the cable tie s protruding end section with a side cutter 22 7 7 CHANGING THE BATTERIES The person responsible for carrying out the maintenance should decide whether for the sake of simplicity the entire internal battery pack with PCB should be changed If only changing the battery pack without PCB proceed as follows 1 Pull the battery pack cable F8 from the battery charging PCB F3 2 Loosen the two screws F2 on the battery charging PCB 8 Lift the clip fasteners at the top and bottom of the housing using a screwdriver or similar tool and push the two halves of the housing F1 apart 4 Take both of the batteries out of the housing Insert the new batteries into the housing Take care that the batteries on one side are some what raised and are correctly fitte
9. test has 2 functions e Testing the connected tube system and the device for leaks e Functional testing of the excess pressure switch Carry out the tightness test as follows 1 Seal the connection for the tube system with the blind plug APM art no 0000 4831 2 Connect the short tube of the blind plug APM to the control tube connection a and the long tube to the pressure measuring tube connection 5 Connect the device to the mains power Switch the device on Activate the Clinic mode Activate the Service screen using the lt or gt cursor key Select Tightness test using the Y cursor key or touch wheel Press the OK button Enter the PIN code 1302 using the cursor keys or touch wheel Pressing the OK button switches to the next number respectively OC ON m O0 gt amp 10 The tightness test is started The current pressure and current flow are displayed The pres sure is first increased to 50 hPa and a test is run to see whether the pressure at this value stays constant for a few seconds The pressure is subsequently increased further to 60 hPa If a value over 60 hPa is measured the excess pressure switch switches the device off and an error message for the pressure sensor is displayed in the status screen In this case please contact HOFFRICHTER A CAUTION In the case of a pressure sensor error the device must not be used 11 Monitor the flow value during the tightness test At values over 3
10. the front panel Take the PCB controller A9 and reconnect all cables and tubes according to the cable and tube connecting plans While connecting the tubes hold the pressure sensors tightly to avoid damaging their pins The further assembly is described in section 7 10 24 7 10 ASSEMBLING AND CLOSING THE DEVICE 1 NON Take the housing s back part A8 and connect the motor cable K10 with the DC communica tion PCB D1 Fit the housing s back part A8 into the housing s upper part A6 Connect the controller PCB A9 and the back part A8 with the DC communication PCB and position the controller PCB into the corresponding guides in the upper part of the housing A6 Check the position and fit of the back part Fit the cover for the check valve Ensure that the fastening tabs on both sides snap in audi bly and that the interior wall A17 sits behind the cover for the check valve It should also be ensured that the cover fit exactly onto the slot of the bellows A7 Fit the battery pack and connect the battery pack PCB F3 to the controller PCB A9 Insert both lateral housing parts A4 A10 Ensure that they sit correctly in the guides Finally check that all components and connections fit correctly Fit the lower part A14 and securely tighten all four screws A13 Ensure that none of the cables and tubes are squeezed Insert the filter cassette holder D3 with new filters into the back part A8
11. 32 e Adapter for flow sensor calibration art no 0000 4946 e Adapter for oxygen connection straight art no 4100 0104 e RS232 connection cable e Airflow resistor 7 mm art no 0000 7305 e Blind plug APM art no 0000 4831 e PC with following system requirements minimum requirements MS Windows XP Vista or 7 AMD Athlon Pentium Class x86 operating frequency gt 700 MHz 512 MB RAM recommended atleast 400 MB free hard disc space Microsoft NET Framework 2 0 Redistributable x86 2 MB graphics card with at least High Color 16 Bit Mouse one available serial interface USB Port e USB cable e HOFFRICHTER PC Software VENTcontrol art Nr 0001 4876 e Spray disinfectant e Device to check the electrical safety e g SECUTEST SII DIN EN 62353 2008 e Service manual user s manual ACAUTION All tools measuring equipment and aids possibly exposed to contamination must be cleaned after they have been used and treated with disinfectant 20 7 1 2 UNPACKING AND DISINFECTING ACAUTION To protect against germs the surface of the device and where present the humidifier must be treated with a disinfectant immediately after unpacking 7 1 3 CHECKING FOR EXTERNAL DAMAGE Before starting the service works check the device for external damage 7 1 4 DATA BACKUP We recommend that a backup is carried out before starting maintenance work Connect the device to aPC and use VENTcontrol to read
12. ACK PART D1 PCB DC communication N D2 Back part D3 Holder for filter cassette D4 Filter cassette I gt D9 4x Lens head L gt screw 2 2x6 5 D10 Coarse filter D8 Seal back wall Figure 8 Exploded view Back part 4 7 EXPLODED VIEW AIR OUTLET UNIT E9 Proportional valve K6 Proportional With cable E10 Spring valve cable E1 Air outlet without humidifier cable Y E3 Seal flow element E8 Humidifier Be ie unlock key E4 Flow element E5 Holder flow element E7 Seal air outlet f a E6 Humidifier cable K7 a NS assembled sensor cable a Figure 9 Exploded view Air outlet unit 4 8 EXPLODED VIEW BATTERY PACK F2 2x Screws 2 2x6 5 F1 Half of casing F3 PCB Battery charging K8 Cable battery pack F1 Half of casing F4 Internal battery pack 1 set Figure 10 Exploded view Battery pack 4 9 CABLE CONNECTING PLAN PCB CONTROLLER Connection E6 Cable humidifier Connection K7 Cable temperature sensor Connection Connection K3 Cable signal transmitter K6 Cable proportional valve Connection K5 Cable O2 valve K9 Cable control valve Connection KA Cable O2 sensor Figure 11 Cable connection plan PCB Controller 4 10 TUBE CONNECTING PLAN 4 10 1 FOR DEVICES UP TO SERIAL NUMBER CAI1300550 E5 Holder flow element A16 Bellows E9 Proportional C6 Control air outlet E x _r a A Sinter zn nr nen
13. LIBRATION Connect the flow sensor airflow resistor adapter and TRENDvent see Figure 16 on page 27 Activate the Clinic mode Activate the Service screen using the lt or cursor key Select Flow sensor calibration using the Y cursor key or touch wheel Press the OK button Enter the PIN code 1302 using the cursor key or touch wheel Pressing the Ok button switches to the next number respectively 7 The flow sensor calibration is performed at O 10 20 40 60 80 100 120 and 160 l min Pressing the esc button aborts the flow sensor calibration oa fw N gt 27 9 1 3 AUTOMATIC FLOW SENSOR CALIBRATION 1 Connect the flow measurement device to the TRENDvent using the RS232 connection cable see Figure 16 on page 27 Connect the flow sensor airflow resistor adapter and TRENDvent see Figure 16 on page 27 Activate the Clinic mode Activate the Service screen using the lt or gt cursor key Select Flow sensor calibration gt automatic using the Y cursor key or touch wheel Press the OK button Enter the PIN code 1302 using the cursor keys or touch wheel Pressing the OK button switches to the next number respectively N Ol ewo N 8 The flow sensor calibration starts automatically Pressing the esc button aborts the flow sensor calibration 9 2 TIGHTNESS TEST The tightness test should be carried out as part of the annual maintenance or after the repair of rel evant components The tightness
14. Quality makes the Difference m m m m Service Manual Ventilator CONTENTS 3 1 3 1 1 3 2 3 3 3 4 4 1 4 2 4 3 4 4 4 5 4 6 47 4 8 4 9 4 10 4 10 1 4 11 4 11 1 5 1 5 1 1 5 1 2 5 2 5 3 5 4 5 5 5 6 5 7 5 8 6 1 6 2 7 1 7 1 1 1 1 2 7 1 3 7 1 4 7 2 7 3 7 4 Symbols used in this service manual unsuunnnnonnnnnnnnnnnnnnnnennnnnnnnnnnnn nennen nn 4 Safety INiommallon anerkennen 4 Maintenance repair and safety related check u 4244ssnsnnennnnnnnnnnnnnn nennen nnnnnnnn 5 Maintenance 4sssnsseeenennnnnennnnnennnnennnneennnnnnneennennnnnennnnnnnennnnnnsnnsnnnnnssnsnnennnsnnrnnnnenn 5 Maintenance schedule sirieni ree e aaaea saha ESEA REEERE EEEE EEEE 5 REPAS enea e E O E E E a A E 6 FIYOISMIC preparatla esiaren E E reihe een 6 safety related CHECK nr seen e EAE GARESEN EEEE 6 Description Of devige tesisse a a een AAEE E AE 7 Housing display and control elements ssssssissesssrirttttttttttrrtt tnn EEEEEEEEEEEEEEEEEEEEEE EEEE EErEE 7 Operating Unisefin A EGEE UES EEEE EEE Te 9 Exploded view General layout 22uussnnsseeneeenneeesnennnnesnnnnnnnnennnnnnenennsnnnnnnnennnnnnnnnn 10 Exploded view Housing upper part ueeessssseeensssesnennnnnsennennnnnnnne nennen nnnnnn nenn nn nee 11 Exploded view Front panel ccccccceccccseeeeeeceeeeeeeeeeseeeeeeeeeseeeeeeeeeseeeeseeseneseetensaeeeeeeeas 12 Exploded View Back Ball
15. ance kit 5 Setting the device back to factory settings 30 Safety related check 6 Documentation 31 Table 1 Maintenance intervals Before every recommissioning Safety related check 6 Documentation 31 When changing patients prepa Hygienic preparation in accordance with the TRENDvent hygiene ration the preparation of con concept taminated devices e g MRSA Table 2 Additional work 3 2 REPAIRS Repairs to the device may only be carried out by an authorized service agency The following should be carried out in the case of a repair Wipe disinfect the device surface e g Mikrozid Liquid Check the error description and error analysis Carry out the repairs Final inspection consisting of Safety related test see section 3 4 on page 6 Checking the electrical safety of the power supply see section 9 6 on page 31 Final work section 10 on page 31 Packaging of the device according to the packing instructions in section 13 2 1 on page 36 Shipping according to the shipping instructions in section 13 2 2 on page 36 3 3 HYGIENIC PREPARATION During preparation preparation on changing patients as well as preparation after contamination e g MRSA the device should be treated according to the TRENDvent hygiene concept 3 4 SAFETY RELATED CHECK The safety related check must be carried annually after repairs and before every recommissioning This consists of a visual inspection of the device for external dama
16. d and that cables are not trapped or squeezed Push the two halves of the housing together Plug the battery pack cable onto the battery charging PCB Fix the battery charging PCB to the housing using the two screws oe ON Perform a battery test IMPORTANT When using new batteries without a PCB art no 1600 0015 a battery test must be per formed see section 9 4 after assembling the device 7 8 CHANGING THE FILTERS Pull the filter cassette holder D3 from the device Slide the filter cassette out from the filter cassette holder D4 Remove the coarse filter black D10 Remove the fine filter white G7 OE O N Insert a new coarse filter followed by a new fine filter into the filter cassette 7 9 EXCHANGING THE BLOWER BOX The blower box is contained in Maintenance kit 5 and should be exchanged after a runtime of 15000 hours or every 5 years or displaying in the device or displaying via bargraph in VENTcon trol Open and disassemble the device according to section 7 2 and subsequently complete the fol lowing steps 1 Press the ferrite core out of the retaining clip 2 Disconnect all cables and tubes from the PCB controller AQ in the following order Ribbon cable temperature sensor K7 Cable humidifier connection E6 Cable proportional valve K6 Cable oxygen valve K5 Cable control valve K9 Cable signal transmitter K3 Cable oxygen sensor K4 All tubes While doing
17. ed devices 3 MAINTENANCE REPAIR AND SAFETY RELATED CHECK IMPORTANT All procedures performed are to be recorded 3 1 MAINTENANCE The ventilator should be serviced in accordance with the maintenance schedule by an authorized service agency 3 1 1 MAINTENANCE SCHEDULE Maintenance interval Action required Weekly Clean the air filters coarse filter Monthly or earlier in case of Replace the air filters coarse and fine filter heavy contamination Every 6 months Carry out battery quick test 19 Every 6 months during storage Charging the batteries 19 Every 12 months Opening and disassembling the device 21 Maintenance kit 1 Cleaning and disinfection 22 Check the silicone tubes 22 Check the cables and connections 22 Changing the 9V rechargeable battery 22 Assembling and closing the device 25 Changing the filters 23 Flow sensor calibration 2m Tightness test 28 O2 valve test 29 Check the electrical safety of the external power supply Sil Safety related check 6 Documentation Sill Every 2 years Changing the internal batteries Maintenance kit 2a or 2b Changing the battery pack without PCB with battery test or 28 Changing the battery pack with PCB without battery test Safety related check 6 Documentation Si Every 15000 h blower run time Exchanging the blower box 23 or every 5 years or displaying Flow sensor calibration 27 in the device or displaying Tightness test 28 via bargraph in VENTcontrol O2 valve test 29 Mainten
18. eeeceeeaeeeeeceaae cesses saaeeeeeeeseaeaeeeeeseceseetesneneeresaaenneeseas 27 Manual flow sensor calibration 44444444ennnneenennnnnneennnnnnnnnnnnnnneneennnnnn nennen nn 27 Automatic flow sensor calibration r2244snnnnneeeennnnnnnneennnnnenee nennen EEEE een 28 VIGIMUMOSS AOS Css serscnrueasa a e E scan cemusdark ususe eicwea sas Ea a 28 O2 WAIVE leS eere Arn E O saageigsedasapeagieed avsectaoteniaactaensata nests 29 Battery toS i enep enpe E R E EE OA E 30 Setting the device back to factory settings u seeesnsssseeeeennnsneeeennnnnn nennen nenn nennen 30 Check the electrical safety of the external power sUpPIy uemeesssesennnnssenenennnnnenen en 31 Final W rks ansie elek 31 Maintenance kits spare part list 44440 nnnennnnnnnnnnnnnnennnnnnnnn nennen nnnnen nn 32 Maintenance Kits eensssseeeennnnnneeeennnnnneeeennnnnnenennnnnnnennnnnennennnnneennnnnnnnrenennnnnnnnnennnnn nee 32 Spare part E E A 33 Disposal ivssceeitronan cence en E nenne 35 Device and COMPONENTS nn ne en een anna nenn denen nee re 35 Packaging nenne ehem E ren Seduduadex caishdva seen E 35 ACM SS inc A naeh ted uaa EE sehe he eh an ccatedimamas E 35 OXYGEN SCMSOM sci An hen E E ehem anne nahen sat ddanden eauashesesdennataseveses A 35 Shipping Inst ellons aussen a e a e e k aas 36 Shipping instructions for contaminated medical technology cccccseeeecseeecseeeeeeeseeeeeneess 36 Pick Up aa
19. enee nenne 19 Operating unit DiSpl y erisir E E E EEDE EE E EEE EEEE 19 Interfaces ennenen r E E E TEE EAE E E EEEO D EENES 19 Battery maintenance ee Re nee 19 Perform the battery quick test snsseseeennssseneeenneeesnennnnneennnnnnsnnnnnnnnnsnnnnssnnnnnnnennnnnnnnnn 19 Charging the batteries 4440000ss4nennnsenennnnnnnnnnennnnennnnnneeennnnnnersnnnnnnennnnnnnsnsnnen een 19 SEIVIEING ee ee 20 Preliminary steps E E a E 20 Tools and measuring equipment uusssssseesnessseeennnnnneneennnnnnnneennnnneneeennnnn een nnren nn 20 Unpacking and disinfecting cccccccceccseeeeeeceaeeeeeeeesaeeeeeeeeseeeeeeeeeseceeeeeesseeneeteeaaeneeeeees 21 Checking for external damage ccccccceceececeeeeeeeeeeeeaeeeeeceeaaeeeeeeeaaeeeeeesaaeaeeeeeesseeeeeeeenees 21 Data DACKUD ss un una een E an ie he en en Eee an Deere dene hen 21 Opening and disassembling the device uunsssseeesnsssseeeennnneneeennnnen een nennen nn nnnen nn 21 AEE A EA T S E E A A 22 Check the silicone tubes uusssssseeennsseeennnnnnnneeennnnnenennnnnneeennnnnnennnnnnennnnnnnrrren nn 22 18 7 6 7 7 7 8 7 9 7 10 8 8 1 8 2 8 3 8 4 8 6 8 7 8 8 9 9 1 9 1 1 9 1 2 9 1 3 9 2 9 3 9 4 9 5 9 6 10 11 11 1 11 2 12 12 1 12 2 12 3 12 4 13 13 1 13 121 13 1 2 13 1 3 13 2 13 2 1 Check the cables and CONNECTIONS sessessessesensennennn nenne nn nn nenne nennen nennen nenne nenn 22
20. erial number CAI1 300550 0001 4989 Replacement kit 1 1 as of serial number CAI1300551 0001 4990 Replacement kit 2 1 as of serial number CAI1300551 0001 4991 Table 7 Spare parts list 34 12 DISPOSAL Proper disposal saves natural resources and prevents harmful substances being released into the environment 12 1 DEVICE AND COMPONENTS The device or components must not be disposed of with the household waste They must be dis posed of at a communal collection point or public waste disposal authority 12 2 PACKAGING The packaging can be disposed with the normal household waste 12 3 BATTERIES Batteries must not be disposed of with the household waste They must be disposed of at a local retailer or at a communal collection point 12 4 OXYGEN SENSOR The oxygen sensor must not be disposed of with the household waste It should be disposed of correctly by incineration in a hazardous waste incineration plant Local official regulations should be observed 35 13 SHIPPING INSTRUCTIONS 13 1 SHIPPING INSTRUCTIONS FOR CONTAMINATED MEDICAL TECHNOLOGY The following shipping instructions apply to contaminated medical technology which is delivered to HOFFRICHTER GmbH for processing 13 1 1 PICK UP The dealer medical technician or authorised personnel picks up the contaminated medical technol ogy from the patient A local surface disinfection of the equipment and accessories with microcide liquid spray MRSA active takes
21. g must be proper and robust and must not be contaminated The box should be sealed carefully with packing tape 13 2 2 SHIPPING The accompanying documents must contain the following information which must be visible to the recipient Zu Ihrer Information Dieses Gerat wurde nur oberflachendesinfiziert Es erfolgte keine hygienische Aufbereitung For your information This device was disinfected only at the surface There was no hygienic treatment Shipping takes place by appropriate logistics companies 36 HOFFRICHTER GmbH Mettenheimer StraBe 12 14 19061 Schwerin Germany Phone 49 385 39925 0 Fax 49 385 39925 25 E Mail info hoffrichter de www hoffrichter de TRENDventService ENG_2015 02 04_09
22. ge a functional check see page 26 a visual inspection of the accessories in accordance with the manufacturer s instructions respi ratory tubes oxygen sensor etc The safety related check carried out must be documented 4 DESCRIPTION OF DEVICE 4 1 HOUSING DISPLAY AND CONTROL ELEMENTS Display Unlocking button for Operating unit humidifier G1 Connection for tube system humidifier FR Contact sockets for humidifier Handle Oxygen sensor cable connection jack 2 5 mm 0 G4 Oxygen O G2 Control tube connection e Y connection at 4 5mm G5 Oxygen O G3 Pressure measuring output gt tube connection MW a 3 5 mm Figure 1 Front view of device Tube system switch Sign for power supply Main switch DC Mains socket 24V 5A Com Service connection RS232 interface RJ11 6 4 Remote alarm LED Air inlet with integrated filter cassette fine and coarse filter detachable Remote alarm connection RJ10 4 4 e lt PC connection USB interface Typ B Connection cover Figure 2 Rear view of device PE Se py G7 Fine filter oz Pt Figure 3 Holder filter cassette 4 2 OPERATING UNIT Power LED Battery LED TRENDvent esc button Touch wheel with 4 cu
23. he following kits for the various replacement and maintenance cycles Maintenance kit 1 art no 0001 4984 Every 12 months Quantity 1 Rechargeable battery 9V 1 Cover check valve 1 Coarse filter 1 Fine filter Table 3 Maintenance kit 1 Maintenance kit 2a art no 0001 4985 Every 2 years Quantity 1 Maintenance kit 1 1 set Internal rechargeable battery pack Li lon without PCB battery changing and housing battery test necessary Table 4 Maintenance kit 2a or Maintenance kit 2b art no 0001 4987 Every 2 years Quantity 1 Maintenance kit 1 1 set Internal rechargeaable battery pack with housing and PCB battery charging Table 5 Maintenance kit 2b Maintenance kit 5 art no 0001 4986 After 15000 h blower runnning time or every 5 years or displaying in the device or displaying via bar graph in VENTcontrol Quantity 1 Maintenance kit 1 1 Blower box 1 Cable tie 142 mm 4 Cable tie 71 mm Table 6 Maintenance kit 5 32 11 2 SPARE PART LIST Pos Designation Article number Al Front panel assembled without oxygen block 0001 4104 A2 Air outlet with contact springs and flow element assembly set 0001 4110 up to serial number CAI1 300550 A2 Air outlet with contact springs and flow element assembly set 0001 4153 as of serial number CAI1300551 A3 Blower Box 0001 4505 A4 Side housing part without handle 4210 1019 A5 Inner frame with foam clips check valve and magnet
24. he next number respectively ne a 10 The O2 valve test is started The current pressure and current flow are displayed The flow value must correspond approximately with the value at which the oxygen is introduced If the flow value displayed is lower or zero then the O2 valve is not working properly The same applies if the pressure value is larger than zero 29 9 4 BATTERY TEST If the maintenance of the device is carried out in the workshop we recommend that a test of the internal batteries is carried out The battery test must be carried out every 2 years as well as after changing the single batteries maintenance kit 2a The test takes max 4 hours NOTICE For the battery test a tube system or other accessories must not be connected to the device Carry out the battery test as follows Connect the device to the mains power Switch the device on Activate the Clinic mode Activate the Service screen using the lt or gt cursor key Select Battery Check using the Y cursor key or touch wheel Press the OK button Enter the PIN code 1302 using the cursor keys or touch wheel Pressing the OK button switches to the next number respectively ae gee DO 8 After the PIN code has been entered the battery test which consists of two phases will start a Phase 1 Battery is charged max 3h depending on the battery s charge status b Phase 2 Battery is discharged with a constant load approx 1h The d
25. hen no electrical power is applied to the device If the main switch is switched off and the power supply is connected the internal battery is charged electrical power is still applied to the device Repair and maintenance tasks may only be carried out by suitably qualified authorized and competent personal Oxygen sensors contain a caustic liquid Avoid skin or eye contact if there is a sensor leak For oxygen sensors no adjustment or repair work is required Components carrying oxygen must not come into contact with oils or fats There is a risk for fire and explosion For hygienic reasons it is recommended to wear disposable gloves when you carry out a task on the device Before the next tasks please wipe the device with a commercial disinfecting solution e g Mikrozid Liquid The documents delivered with the device must be checked when the device arrives at the Service department Should anything point to contamination of the device e g MRSA this device should be treated separately according to the TRENDvent hygiene concept transport storage processing Special hygienic measures are necessary when a maintenance or repair task is carried out on a machine contaminated by MRSA Methicillin Resistant Staphylo coccus Aureus In all circumstances protective clothing must be worn such as gloves lab coat and face mask Please refer to the TRENDvent hygiene concept for further information on the handling of MRSA contaminat
26. isplay indicates the progress of the battery test as a percentage After the 2nd phase has ended the capacity of the battery is displayed If the capacity is gt 80 the test is considered to be passed If the capacity is lower or the message ERROR is displayed in the status screen both batteries or the entire battery pack must be replaced 9 5 SETTING THE DEVICE BACK TO FACTORY SETTINGS The device s standard factory values can be found in the user s manual To reset the device to the factory settings proceed as follows Activate the Service screen using the lt or gt cursor key 2 Select Factory settings using the Y cursor key or touch wheel Enter the PIN code 1302 using the cursor keys or touch wheel Pressing the OK button switches to the next number respectively 4 After the PIN code has been entered the device restarts 5 The contrast setting Set Contrast is shown in the display The display contains two bars with black and white outer fields The fields in the center should be medium gray see fig ure To set this press A to increase the con trast and W to decrease the contrast 6 Press the OK button IMPORTANT If the contrast is not set within 1 minute the device will sound an alarm up until the contrast is set 30 9 6 CHECK THE ELECTRICAL SAFETY OF THE EXTERNAL POWER SUPPLY Testing the electrical safety of the external power supply should be carried out as part of the annual
27. l min there may be a leak in the tube system and it should be replaced 28 9 3 O2 VALVE TEST The O2 valve test should be carried out as part of the annual maintenance or after the repair of rele vant components If it has been assured that the device is exclusively used without an oxygen sup ply the O2 test can be omitted NOTICE During the O2 valve test a tube system must not be connected to the device It should fur thermore be noted that ventilation is switched off IMPORTANT We recommend that a flow sensor calibration is carried out before the O2 valve test The O2 valve test checks that the O2 valve is functioning properly Carry out the O2 valve test as follows Connect the device to the mains power 2 Connect the tube from the oxygen source to the oxygen connection adapter Insert the O2 connection adapter into the oxygen connection 2 NOTICE Only the O2 connection adapter supplied may be used to connect oxygen Otherwise there is a risk that the back stop in the connection is damaged Fats or oils must not be used as lubricants in the area around the O2 connection There is a risk for fire and explosion Switch the device on Activate the Clinic mode Activate the Service screen using the lt or gt cursor key Select O2 Valve Check using the Y cursor key or touch wheel Press the OK button Enter the PIN code 1302 using the cursor keys or touch wheel Pressing the OK button switches to t
28. m e Connection for oxygen sensor jack 2 5 mm 5 5 POWER SUPPLY The device is supplied with power via an AC DC switching power supply or the internal battery The device can also be provided with an external power supply using the AKKUPACK uni Ask your spe cialist dealer about this 5 6 PCB CONTROLLER CONTROL AND OPERATING UNIT The controller PCB is the main structural element of the device It contains the controllers for opera tion and controls the sensors pressure temperature components for measuring voltage and cur rent for acoustic and visual alarms and the generation of supply voltage 5 7 OPERATING UNIT DISPLAY The operating unit is made of float glass and is 202 x 110mm in size The material is approx 3mm thick All elements are described in Figure 4 on page 9 The display is 81 x61 mm in size and has a resolution of 320 x 240 pixels 5 8 INTERFACES The device has an USB interface for connection to a PC This interface enables the PC software VENTcontrol to be used to communicate with the device and software updates can be carried out There is also a connection for the nurse call or a remote alarm box For the flow sensor calibration the device has an RS282 interface 6 BATTERY MAINTENANCE 6 1 PERFORM THE BATTERY QUICK TEST The battery quick test verifies whether the device in case of a power failure can be operated on bat tery for at least one hour When the device is used the battery quick test must be pe
29. maintenance and during repair work General information The TRENDvent ventilation system consists of an external SK II power supply and the ventilator which is operated at 24 V direct current To meet the protection class Il requirements the ventilation system has been designed with a BF application part of the DIN standards EN 60601 1 A2 1995 and EN 60601 1 2006 Tests The tests are carried out by a device safety tester e g SECUTEST SIII working in accordance with the DIN EN 62353 2008 standard The leakage currents should be determined by direct mea surement The ventilation system should be tested with a BF application part according to protection class Il The accompanying protection class II power supply is tested in the system Any faults in the power supply are detected in the test of the entire system according to protection class Il Device leakage current The device leakage current is measured by the device safety tester e g SECUTEST SIII with a probe at the housing at the O2 sensor connection The test is passed if the device leakage current limits comply with the standard DIN EN 62353 2008 Table 2 10 FINAL WORKS All maintenance or repair work must be recorded Furthermore the Service checklist should be filled in and a testing seal including the date and the tester s mark should be applied at a suitable place on the device 31 11 MAINTENANCE KITS SPARE PART LIST 11 1 MAINTENANCE KITS Use t
30. nun aaa aan 12 Exploded view Air outlet Unit elek 13 Exploded view Battery pack cccccccecccceeeeeeceeeeeeeeeesaaeeeeeeeaeeeaeeeeeseeeeetesneeeeseesaenneeeeas 13 Cable connecting plan PCB controller u ssseennsssseeennnnnneeennnnen en nennen ennnnnenen nn 14 TUBES COMMECUNGMPIAM sacsiscstasdacsacectewersncewededeadsdwanexsansbbueskeldvaneseaededaewenndeaddsn nies AEA 15 For devices up to serial number CAI GOO550 ee ceeeececeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeneas 15 TUBE connecting Plan asus sen nenne 16 For devices as of serial number CAI1 300551 2 uussssssseennnseeennnnnnnnnnenennnn nennen 16 Important components 4444444444nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnenerennnennnnnnn nn 17 Block diagrams ccccccccececcece ee eeeee cess 1111k ease a eeeeeeeeeaeeeeeeseeeeeeeeeseeeeeeeeeeeneeeeeeeeeeeeeeeeeeeneeneas 17 Block diagram of compressed air distribution usssssennnsseeeennnnnnenennnnnnnnne nenne 17 Block diagram of entire device nnssseesennsssseeeennnsennennnnnnnnennnnnnenennnnnrenennnnnn nenn nn 18 ESIOW Cle ee ee een In Reh Eee ee een 18 PCB DG COMMUMIGATION an ee een ee ee de Nas aan enden 18 Sensors Valves distribution of the compressed a lf 4444ssnsseennnnnneeeeennnnnnnen een 18 POW SUBP rre e re Ben eyes era ee nenne ee Henne 19 PCB controller Control and operating unit 4 444sseennnseneennnnnnneeennnnn
31. o ee see een 36 Packaging for SHIPPING sense ee anne 36 SHIPPING sn ee btvaxtaxeuaieaneenbhodeletokdedaaenden Des Ener a a a ree Tee e 36 Shipping devices after maintenance or repairs eeesssssseeeeennneeeeennnnneennn nennen nenn nennen 36 Packaging for SNIPING ss nee ehe ehe ern 36 SAMPON IE eats shee ncs e a shwenesen a c EPENTTERNE E ES A TEE NEEHONRNTEEEE 36 1 SYMBOLS USED IN THIS SERVICE MANUAL Important information is denoted by symbols in this service manual Be sure to follow these instruc tions in order to avoid accidents personal injury and material damage In addition the local accident prevention regulations and general safety regulations in force in the area of use must be observed A This symbol denotes general safety instructions Follow these instructions to avoid accidents personal injury or material damage AWARNING This symbol denotes hazardous situations that may lead to serious injuries or death ACAUTION This symbol denotes hazardous situations that may lead to moderately severe injuries NOTICE This symbol denotes situations that may lead to material damage or damage to the device IMPORTANT This symbol denotes information tips and instructions for the efficient error free use of the device 2 SAFETY INFORMATION Before you start with the maintenance fully read and understand the contents of this Service Manual There is a danger of short circuiting of the capacitors and battery even w
32. out and save the device data Notes on the following sections of text The numbers in brackets designate the position numbers according to the exploded drawings sec tion 4 3 on page 10 to section 4 10 on page 15 and the spare parts list section 11 2 on page 33 7 2 OPENING AND DISASSEMBLING THE DEVICE During the maintenance work check for any moisture in the device Damp areas should be wiped and disinfected Before assembly ensure that the affected areas are sufficiently dry 5 Switch off the device using the main switch and disconnect it from the mains power as well as all connected components e g humidifier Remove the filter cassette holder D3 Place the device with the upper side on a soft surface If the HOFFRICHTER warranty seal is still in place remove it Oo ON Unscrew the four screws on the underside of the device using a long screwdriver Phillips tip PH1 x 200 10 Lift off the lower part of the housing A14 Ensure that the screws do not fall out and are lost 11 Remove both lateral housing parts A4 A10 12 Detach the battery pack A11 from the controller PCB AQ by pulling the battery charging PCB F3 away from the controller PCB 13 Detach the controller PCB AQ from the DC communication PCB D1 14 Tilt the housing s back part A8 outwards and pull the motor cable off from the DC communi cation PCB D1 15 Remove the back part A8 16 Dismantle the cover for the check
33. place followed by carefully placing the objects in bags with the use of disposable gloves mask and disposable apron The proper disposal of disposable materials is respected 13 1 2 PACKAGING FOR SHIPPING The packaging of equipment accessories in sterile welding foil followed by shrink wrap or packing in PVC or PE bags tear resistant and sealed by tape or tie wrap takes place at the dealer s or in the service departments Power cable ventilation equipment user s manual and other accessories with minimal risk of infec tion must be properly disposed of Hint CAUTION CONTAMINATED EQUIPMENT or CAUTION MRSA CONTAMINATED EQUIPMENT must be visibly placed on the packaging The packaging must be proper and robust and must not be contaminated The box is conscien tiously sealed with packing tape 13 1 3 SHIPPING The delivery note must be on the outside of the equipment packaging Notice on delivery note CAUTION CONTAMINATED EQUIPMENT or CAUTION MRSA CON TAMINATED EQUIPMENT Shipping takes place by appropriate logistics companies 13 2 SHIPPING DEVICES AFTER MAINTENANCE OR REPAIRS The shipping instructions apply to medical technology which is sent back to the customer or dealer by the Service department after maintenance or repairs 13 2 1 PACKAGING FOR SHIPPING The device is packaged in PVC or PE bags tear proof The bag must be sealed securely e g tape or cable ties The packagin
34. rformed out by the provider or user every 6 months However a monthly check is recommended 1 Make sure that the batteries are fully charged 100 2 _ Disconnect the device from the mains and operate the device 1 hour on battery power 3 The test is passed if after 1 hour the battery capacity is gt 10 and the alarm Internal Bat tery low has not occurred If the battery capacity has gone below 10 and the alarm Internal Battery low has occurred the batteries must be replaced by an authorized service technician 4 Charge the batteries up to 100 by operating the devices via mains 6 2 CHARGING THE BATTERIES During the storage charge the batteries every 6 months up to 100 capacity by operating the devices via mains 7 SERVICING 7 1 PRELIMINARY STEPS 7 1 1 TOOLS AND MEASURING EQUIPMENT To carry out maintenance the tools and equipment are required as follows e Respiratory device TRENDvent e Valve tube system e Test lung with following specifications Compliance 25 ml mbar V 500 ml PEEP 0 mbar Resistance 20 mbar I s Tidal volume max 1000 ml e Screwdriver long Phillips tip PH1 x 200 e Side cutter e Compressed air supply or stationary compressed air connection e Soft brush and vacuum cleaner e Soft underlay e Disposable gloves e TRENDvent power supply art no 0001 4206 and mains cable art no 3110 0023 e Airflow Pressure Meter 0 200 l min e g HOFFRICHTER APM art no 0000 48
35. rsor buttons OK button Alarm button Heating button ON OFF button Figure 4 Operating unit elements 4 3 EXPLODED VIEW GENERAL LAYOUT A5 Inner frame A6 Housing upper complete part complete A17 Interior wall Bellows air inlet straight A4 Side housing part A8 Back part assembled without handle gt j BI B A2 Air outlet with AS Blower Box kid flow element D i Motor cable AGEE ES Y C6 Control valve LE gt controller with cable n gt Q J gt e A1 Front panel i lg A10 Side housing part A16 Bellows air A15 Cover Siy with handle outlet angled check vae SS A11 Battery pack complete A14 Housing lower part complete A12 4x Housing foot A13 4x Lens head screw gt for housing M8 x 8 8 Day So 4 Figure 5 Exploded view General layout 4 4 EXPLODED VIEW HOUSING UPPER PART AN B1 Label band B2 Operation panel K1 Ribbon cable B3 Seal operation operation panel panel B4 Display K2 Ribbon cable display B6 Housing upper part e B7 8x Hexagonal nuts M2 5 Figure 6 Exploded view Housing upper part 4 5 EXPLODED VIEW FRONT PANEL C6 Control valve os With cable CS N K9 Control valve i cable C2 Piezo signal transmitter with PCB and cable K3 Signal transmitter cable O2 sensor C1 Front panel K5 02 valve cable C5 02 connector Figure 7 Exploded view Front panel 4 6 EXPLODED VIEW B
36. th a side cutter Place the inner frame onto the upper part of the housing A6 Ensure that the inner frame sits exactly in the corresponding guides and no tubes get squeezed Take the front panel and plug the O2 connection tube no color onto the blower box accord ing to the tube connecting plan see Figure 12 on page 15 Fasten the O2 connection tube with the 71 mm cable tie Maintenance kit 5 Cut off the protruding end section with a side cutter Tie up the signal transmitter cable K3 proportional valve cable K6 and control valve cable K9 on the air outlet s right hand side with a cable tie 71 mm Maintenance kit 5 Place those three cables into the slender cable run on top of the air outlet unit Then tie them together with the humidifier cable E6 on the left hand side of the air outlet using a cable tie 71 mm Maintenance kit 5 Affix the whole cable harness together with the temperature sensor cable K7 to the fixing base at the top of the flow element holder using a cable tie 71 mm Maintenance kit 5 Make sure not to squeeze the temperature sensor cable K7 by overtightening the cable tie Cut off the protruding cable tie end sections with a side cutter Press the ferrite core into the retaining clip on the inner frame Connect the O2 valve cable K5 to the control valve cable K9 Ensure the correct polarity Plug the tube with the white marking onto the control tube connection white on the inner side of
37. that hold the pressure sensors tightly to avoid damaging their pins Ribbon cable operation panel K1 Ribbon cable display K2 3 Pull off the O2 connection tube from the blower box and dispose of it 23 N OP Oi E 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Remove the 3 cable ties and dispose of them Pull the tube with the white marking off of the front panel Lift out the inner frame A5 and set it down somewhat offset Pull off the bellows A16 from blower box A3 and flow element holder E5 and dispose of the cable tie Pull the motor cable K10 through the opening of the inner frame and remove the blower box from the inner frame Pull off the bellows A7 from the blower box A3 and dispose of the cable tie Take the new blower box and fit the bellows A7 to the air inlet and fit the bellows A16 to the air outlet Ensure that the bellows with the slots sit correctly in the blower box Insert the new blower box into the inner frame and at the same time feed the motor cable K10 through the opening in the inner frame Ensure that the bellows A7 with the slot sit cor rectly in the inner frame Pull the motor cable upwards in the slit at the back of the inner frame Slip the angled air outlet bellows A16 onto the flow element holder E5 Fasten the bellows with the 142 mm cable tie Maintenance kit 5 Cut off the cable tie s pro truding end section wi
38. valve A15 Take care to avoid breaking the tabs off 21 7 3 CLEANING Carefully clean the interior using the brush and vacuum cleaner 2 Clean areas that are difficult to access using compressed air Then remove any loose particles using the vacuum cleaner 8 Remove any stubborn soiling from the interior and exterior of the upper and lower parts using a cloth which has been moistened with a mild soap solution 4 Ifa humidifier is present wash out the water container and spray disinfect it Treat stubborn calcification with 5 vinegar solution 7 4 CHECK THE SILICONE TUBES Check every silicone tube used in the device for signs of mechanical damage ageing and for cor rect seating and if necessary replace acc to tube connecting plan see Figure 12 on page 15 e Oxygen connection tubes on the blower box A3 and the O block C3 e Pressure measuring tubes on the pressure sensors e Pressure measuring tubes on the flow element holder E5 e Excess pressure tube on the pressure switch and air outlet E1 e Tubes on the control valve C6 7 5 CHECK THE CABLES AND CONNECTIONS Check every connecting and supply cable for correct seating and signs of damage If necessary correct or replace e Ribbon cable operation panel K1 e Ribbon cable display K2 e Cable signal transmitter K3 e Cable oxygen sensor K4 e Cable oxygen valve K5 e Cable proportional valve K6 e Ribbon cable temperature sensor K7 e Cable
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