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Maquet-Servo-i-Service-Manual

1. Event log Service Alarms Ventilator settings gt M Apnea periods gt paj Functions Latest E Time selection Service log H Technical alarms a Test results Preventive maintenance Ml Service report history E Configuration history E Latest T Time selection gt Report PM Replaced Exp membrane Edit _ configuration Adult alarm limits Pa limits i values NIV adult i alarms NIV infant alarms a f Displayed i O i tal t Copy configuration Set date and clock O2 cell adaptation Enter code 1973 to access the Biomed menues gt Display Event logs Possible selections e Latest logs e Selected time interval Display Service logs Possible selections e 21 latest logs e Selected time interval Enters date for a performed Preventive Maintenance into the Service Log Reset of breath counter in expiratory cassette User default configuration setup Copy configuration to from PC Card Date and time setup Measured O2 concentration will be adapted in relation to set value Servo i Ventilator System Using the Menu and Biomed key The Menu and Biomed functions are useful tools during service The adjacent flowchart shows the Biomed functions in System version 2 0
2. ooocooooo 3 10 CO Analyzer module optional 3 10 Control cable csctecesstereusntrtnarertdsaxetcancondsaanendaceewes 3 10 Revision 02 Service Manual 3 1 Description of functions About this chapter This text refers to the Functional Main Blocks diagram in chapter Diagrams Memory types used in the Servo 1 There are four different types of memories used in the Servo i e Flash memory For software storage Can be upgraded updated via a System SW Update Present on PC 1771 PC 1772 PC 1777 and PC 1784 e RAM For temporary storage of software and data Present on PC 1771 PC 1772 and PC 1777 e Non volatile memory RAM with battery back up For settings trends and logs Present on PC 1771 and PC 1772 e EEPROM For PC board information configuration calibration data etc Present on almost all PC boards and in the O cell User Interface Functional Main Blocks diagram marking U User Interface controls Setting of different parameter input values is made with the help of the following different interface devices e Main Rotary Dial rotary encoder with switch e Direct Access Control 4 each rotary encoders e Membrane buttons Integrated parts of the Touch screen assembly e Touch screen PC 1777 Panel Some features included on PC 1777 Panel are e SIMM Single In line Memory Module mounted on its connector P77 Memory type SDRAM e PC Card Sl
3. A complete set of flowcharts showing all Keys and Screen touch pad functions can be found in the Servo i Ventilator System User s Manual appendix User Interface Menu Pressing the fixed key Menu will open the Menu window on the User Interface The Menu is active in Standby and during ventilation mode but the available submenus differs Possible selections in the Menu window are e Alarm e Review e Options e Complience compensation e Copy e Biomed e Panel lock e Change patient category only during ventilation Biomed The Biomed submenu is intended only for Service Personnel and the code 1973 is required to access the Biomed submenus The Biomed menu is active in Standby and during ventilation mode but the available submenus differs Service Available only in Standby mode Event Log Displays Event logs Useful during troubleshooting Service Log Displays Service logs Useful during troubleshooting Report PM This button must be pressed when a Preventive Maintenance has been performed This will reset the timer that indicates operating hours until next Preventive Maintenance Replaced Exp membrane This button must be pressed when the Expiratory cassette membrane has been replaced This will reset the operating capacity meter breath counter in the expiratory cassette Service Manual Revision 02 Servo i Ventilator System Edit configuration Availab
4. PC 1777 Panel Troubleshooting Servo i Ventilator System Test description Recommended action if the test fails If the Alarm output connector test failed Internal tests continued 1 Replace PC 1789 Remote alarm connector 2 Replace PC 1772 Monitoring If the power test failed 1 Replace PC 1772 Monitoring Check the Barometric pressure value in the Status window Checks that the barometric pressure measured by the internal barometer is within 630 1080 hPa If that value is within 630 1080 hPa Checks that the measured barometric pressure values differs less than 8 hPa la Pepe rra Conte between BRE and MON 2 Replace PC 1772 Monitoring BRE MON 3 Barometer test Replace PC 1784 Expiratory channel 4 Replace the gas modules Replace one gas module at a time If that value is outside 630 1080 hPa 1 Replace PC 1772 Monitoring Gas supply pressure test Checks that the gas supply pressures Air and O measured by the internal gas supply pressure transducers are within 200 650 kPa 2 0 6 5 bar Checks that the measured supply gas pressure values differs less than 20 mbar between MON and BRE BRE MON Service Manual Check that the connected gas supply pressure Air and O is within the specified range Stan the unit in a ventilation mode and check the alarms e Ifan Air supply pressure alarm is activated replace the Gas module Air If an O supply pressur
5. The Gas Modules are provided with a mechanical key to prevent that the module is mounted in the wrong slot The key consists of a plastic guide mounted underneath the module and a corresponding guide mounted in the patient unit ID PROM Each Gas Module is provided with an ID PROM The ID information can be read by the Servo i System Connector muff The Connector Muff connects the Gas Module outlets to the Inspiratory Pipe inlet Inspiratory pipe The Inspiratory Pipe leads the gas from the Connector Muff to the Inspiratory Outlet The Inspiratory Pipe comprises e Housing and locking lever for the O Cell with its bacteria filter e Housing for the Safety Valve e Connection for measurement of inspiratory pressure The pipe is provided with internal flanges with the purpose to improve mixing of O and Air Service Manual Servo i Ventilator System O cell The O Cell is mounted in a housing on the Inspiratory Pipe and is protected by a bacteria filter SVX9015 Maintenance including exchange of bacteria filter according to the User s manual The bacteria filter must also be replaced during the Preventive maintenance The O cell gives an output voltage proportional to the partial pressure of oxygen inside the Inspiratory pipe At constant ambient pressure this output is proportional to the O concentration in percent In each O cell the output signal will stay at a fairly constant level usua
6. between PC 1777 and PC 1772 and the error code will thus not be shown on the display but will be logged Revision 02 Service Manual 6 13 Troubleshooting Servo i Ventilator System Error Error message Possible cause Recommended action code 1 Replace PC 1784 Expiratory channel BARO_LOWER_LIMIT_EXCEEDED 1 Check calibrate barometer 2 Replace PC 1772 Monitoring Note This alarm will be activated if the ambient pressure is below 650 hPa e g on a high altitude 0 REAL_TIME_CLOCK_ERR Check that System SW V1 02 05 or later is installed Update System SW if required Replace PC 1772 Monitoring PERSISTENT_CHECKSUM_ERR Restart the unit Replace PC 1772 Monitoring if not Error code 29 43 POWER_COMM_ERR Replace the Battery module s Replace PC 1775 Plug and play back plane Replace PC 1772 Monitoring 44 ALARM_LIM_XOR_ERR Restart the unit Mi Replace PC 1772 Monitoring ABNORMAL_SHUTDOWN 1 Restart the unit and run a Pre use check E e noenomeunary REMOTE_ALARM_ERR 1 Replace PC 1789 Remote alarm connector pee nicirormvmng pa WACO as pre a if not Error code 29 4 4 4 4 4 PRE_OXYGEN_PHASE_TOO_LONG 1 Replace PC1771 Control DISCONNECT_PHASE_TOO_LONG 1 Replace PC1771 Control ul 1 BACKPLANE_EEPROM_INVALID Replace PC1772 Monitoring 2 Replace PC1770 Main back plane 5 6 7 8 9 50 6 14 Service Manual Revision 02 Servo i Ventilator System Troubleshooting Er
7. cleaned or replaced during the Preventive maintenance Optional PC board slots Functional Main Blocks diagram marking X For optional equipment the Servo i is equipped with two extra PC board slots The optional Alarm output connector see below is mounted in one of the extra PC board slots Alarm output connector optional Functional Main Blocks diagram marking A PC 1789 Remote alarm connector containing the optional function Alarm output connector is mounted in the extra PC board slot located below PC 1778 DC DC amp Standard connectors The Alarm output connector enables connection of an external alarm signal system to the Servo i System High and medium priority alarms are transferred and the alarm output signal is active as long as the audio alarm is active on the ventilator The Alarm output connector has two contact functions NO Normally Open and NC Normally Closed In an alarm situation the open contact will close and the closed one will open The contacts are independent of polarity and can be used both with AC and DC systems Pin configuration and signal names in P67 Alarm output connector can be found in chapter Diagrams The Alarm output function must be enabled in the configuration software For further information refer to the Alarm output connector Reference Manual 3 10 Service Manual Servo i Ventilator System Battery modules optional The Batt
8. 10 min backup time remains in the connected Battery module s e No Battery module is connected MON Service Manual Check that the connected gas supply pressure Air and O is within the specified range Check the expiratory cassette e Check that the cassette is correctly seated in the cassette compartment If possible replace the expiratory cassette and check if the new cassette is accepted by the Pre use check If the new cassette was accepted by the Pre use check the fault was located to the cassette The fail with the old cassette may in this case be due to water collected at the pressure transducer filter inside the cassette Dry the old cassette properly Replace the gas modules Replace one gas module at a time Replace PC 1785 Expiratory channel connector Replace PC 1771 Control Replace PC 1772 Monitoring Replace PC 1784 Expiratory channel Check that the total remaining time for the Battery module s is gt 10 min If not allow the battery to charge and repeat the test Replace PC1775 Plug and play back plane Replace the Battery module s Troubleshooting Servo i Ventilator System Test Test description Recommended action if the test fails Patient circuit leakage Checks the patient circuit leakage with If the internal leakage test see above patient tubing connected using the has passed the leakage is to be inspiratory and expiratory pressure located to the pat
9. 11 Changed when needed Power consumption The power consumption depends on the operating mode and whether the internal batteries are being fast or trickle charged Mode Fast charging Trickle charging In operation 70 W 38 W Standby 65 W 33 W Off 35 W 6 W Revision 02 Service Manual Servo i Ventilator System Noise level Less than 50 dBA Packing materials The amounts of packing materials will vary depending on customer adaptation Materials for packing e Loading pallet Fulfils the USA requirements 7 CFR 319 40 May 25 th 1995 e Corrugated cardboard e Stretch film of Polyethylene PE e Shock absorbing material of expanded polyethylene EPE or expanded polypropylene EPP e Clamps of Polyethylene PE Servo i Ventilator System Important Notes 1 8 Service Manual Revision 02 Servo i Ventilator System Introduction 2 Introduction Only personnel trained and authorized by Maquet shall be permitted to perform WWW Main UNIS secsi iniaa acta dad 2 2 installation service or maintenance of the Servo User Interface setasencresssqsatedevesatenedanatosanstednyense 2 4 Make sure to prepare the Servo i properly before Patient Ulea caidos 2 6 disassembling and assembling Refer to section Servo i software Structure ooooonnocccccncconanananncnnos 2 9 Hazard notices in chapter Important CL E A E PM 2 9 Any servi
10. Modules regulates the inspiratory gas flow and gas mixture SVX9003 1 Filter 2 Inspiratory valve temperature sensor 3 Supply pressure transducer 4 Flow transducer Delta pressure transducer and net 5 Nozzle unit with valve diaphragm 6 Inspiratory solenoid The Gas Modules are factory calibrated Each Gas Module must not be disassembled further than described in chapter Preventive maintenance Revision 02 Service Manual Description of functions Gas inlet Gas supply is connected to the ventilators gas inlet nipples The design of the gas inlet nipples and their color markings vary according to the standard chosen Gas is to be connected from hospital central gas supply or from gas cylinders The Air supply may be connected from a compressor for medical air Filter The Filter protects the ventilator from particles in the gas delivered to the Gas Modules The filter must be replaced during the Preventive maintenance The filter housing and the filter cover are provided with matching guide pins These guide pins prevent mounting of the filter cover with gas inlet nipple on the wrong module A non return valve for the gas inlet is located in the filter cover This valve will suppress short pressure drops in the gas supply The non return valve is also designed to slowly evacuate compressed gas from the module if the gas supply to the module is disconnected Inspiratory
11. Revision 02 Servo i Ventilator System SVX9071 SVX9072 Revision 02 Preventive maintenance Internal fan filter e Remove the internal fan filter 1 e Check if the filter is damaged Replace damaged filter e f not damaged clean the filter The filter can be rinsed in water Shake out and make sure that the filter is free from excess water e Mount the new cleaned filter Internal fan e Connect the mains power cable e Set the On Off switch to Standby e Lower the locking catch 1 and disconnect the connector 2 This is done to protect the O cell during the Internal fan test e The temperatur sensor controlling the Internal fan is mounted in the cable connector 2 Carefully warm up the cable connector 2 and check that the Internal fan starts Use e g a light bulb or a heat fan to warm the connector e The Internal fan will start with half effect at approx 33 C 91 F and with full effect at approx 43 C 109 F Note The temperature must not exceed 70 C 158 F e Re connect the connector 2 and mount the inspiratory section cover It is also possible to check the Internal fan by running the unit in a ventilation mode and wait until the Internal fan starts If this test method is used all covers must be mounted in order to raise the temperature inside the compartment Expiratory cassette e Remaining operating capacity in for the membrane can be shown in the S
12. Servo i User s manual e User Interface panel cover Installation Instructions Battery module e Servo i User s manual e Battery module Installation Instructions CO Analyzer module Servo i e Servo i User s manual e CO Analyzer module Servo i Installation Instructions Humidifier holder and Humidifier e Servo i User s manual e Humidifier Operating Manual e Humidifier holder Installation Instructions Alarm output connector e Servo i User s manual e Alarm output connector Installation Instructions e Alarm output connector Reference Manual Introduction Servo i Ventilator System CEPAT Main rotary dial Special function keys Direct access knobs Mains indicator green Standby indicator yellow Start Stop Standby ventilation key Luminescence detector adjusts display brightness automatically 2 2 tS S Se 10 Loudspeaker grid 11 Cable reel 12 PC card slot with slot cover 13 Control cable between User Interface and Patient Unit 14 Service connector for PC 15 On Off switch User Interface 16 Panel holder The User Interface can be mounted onto the Mobile 17 Locking screw alternative mounting cart but can also easily be removed from the cart and mounted on the bed post or table shelf SVX9011 18 Locking arm rotation The User Interface can be rotated and tilted into a 19 Locking arm tilting suitable
13. and assembling section Handling PC boards for further information regarding ESD sensitive components Remove the Patient Unit front cover Refer to chapter Disassembling and assembling Carefully pull out PC 1771 and PC 1772 Note Do not remove the cable connector 1 Information stored in the PC board memory will be erased if the connector is removed If the battery on PC 1771 is disconnected user default configurations made via the Field Service System FSS and Pre use check results including transducer calibrations will be erased If the battery on PC 1772 is disconnected all trends all logs and Pre use check results including transducer calibrations will be erased There are two equal battery connectors 2 and 3 on the PC boards Connect the new battery to the un used connector The memory functions are now secured by the new battery Cut the cable ties holding the old battery 4 to the PC board Disconnect and remove the old battery Mount the new battery onto the PC board using new cable ties as shown in the illustration Insert the PC board into the correct PC board slot and reassemble the Patient Unit After any maintenance or service of the Servo i perform a Pre use check Refer to the Servo i Ventilator System User s manual Service Manual 5 3 Service procedures SVX9065
14. and assembling of the unit is required when replacing parts included in the Maintenance kit 5 000 hours If not stated otherwise refer to chapter Disassembling and assembling for instructions e The letters A D in the text below refers to the description of the Maintenance kit above e Prepare the unit as described in section Preparations above in this chapter Gas modules A Replace filters in the gas modules When replacing filter move the rubber seal from the old to the new filter Service Manual 7 3 Preventive maintenance Servo i Ventilator System B Replace plastic nozzle units in the gas modules After replacement of plastic nozzle units wait 10 minutes before connecting pressure to the gas modules SVX9068 Inspiratory pressure transducer filter C Replace the filter for the inspiratory pressure transducer Make sure that the filter is correctly seated into the rubber ring Refer to instructions in the Servo i Ventilator System User s manual chapter Maintenance Note This filter may already be replaced as a part of the Extended cleaning of Inspiratory channel performed in combination with the Preventive maintenance Bacteria filter for O cell D Replace the bacteria filter for the O cell Refer to instructions in the Servo i Ventilator System User s manual chapter Maintenance N o O x lt gt nm 7 4 Service Manual
15. both lamps at the same time Using the Field Service System FSS a time meter for the lamps can be shown This time meter must be reset after replacement of the lamps Service Manual 4 5 Disassembling and assembling Servo i Ventilator System Touch screen assembly To remove the Touch screen assembly 1 e Lift off the TFT Display Refer to section TFT Display e Remove the Main rotary dial 2 Pull off the Main rotary dial knob Remove the nut holding the Main rotary dial Lift off the Main rotary dial e Remove the Direct access controls 3 Remove the cover on each Direct access control knob Loosen the nut on each knob and pull off the knobs SVX9040 Remove the nut holding each Direct access control and lift off the controls Note When mounting the Main rotary dial and the Direct access controls on a new Touch screen assembly make sure that the knobs are easy to turn Label strips The touch screen assembly is delivered with label strips in different languages which have to be mounted before the unit is taken into operation Protective foils 1 separate the adhesive areas between the front panel film and the front panel Mount the label strips as follows e Select the two appropriate label strips One label strip for the Fixed keys on the upper right hand area and One label strip for the Special functions keys on the lower right hand are
16. generated on PC 1772 PC 1772 also contains a barometric transducer and the measured barometric pressure is supplied to the other sub units in the system Trending of measured parameters are performed by Monitoring A thermistor on PC 1772 monitors the temperature inside the Patient Unit An alarm is activated if the temperature is 77 5 C 170 9 F or higher Includes an ID PROM The ID information can be read by the Servo i System Note The System SW must be re installed if PC 1772 is replaced A lithium battery on PC 1772 power supplies the internal memory on the PC board If the battery on PC 1772 is disconnected or if the battery voltage is too low all logs and Pre use check results including transducer calibrations will be erased The lithium batteries must be replaced after 5 years Power supply Functional Main Blocks diagram marking P The main block Power Supply comprises conversion of mains power to internal power supply as well as the Module unit connections for optional Battery modules and or other optional modules The power modes in the Servo i System are e At Power up i e when the On Off switch is turned On all internal voltages will be enabled e At Power down the Power supply system will deactivate the hardware signal Power_Good H and at the same time keep the internal voltages 5 V and 3 3 V for at least 1 ms in order to let the different subsystems save their current settings in non v
17. log book Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards After any installation maintenance or service intervention in the Servo i perform a Pre use check Refer to the Servo i Ventilator System User s Manual for details Revision 02 Service Manual 9 1 Diagrams Servo i Ventilator System Standard and optional connectors o SS N26 External 12 V DC supply input N28 N70 Control cable 1 12V_UNREG_EXT_DC 1 12V_UNREG_PANEL 2 12V_UNREG_EXT_DC 2 GND 3 3 LED_CONTROL 4 GND 4 ON_OFF_CONTROL 5 GND 5 CAN_PANEL H 6 CAN_PANEL L 9 00 S N27 Optional equipment N29 RS232 1 GND t 2 DISABLE_VALVES_EXT L 2 CI_RDX_IS0 3 CAN_EXPANSION H 3 CI_TDX_ISO 4 CAN_EXPANSION L ETO 5 12V_UNREG_EXPANSION j eee f 8 9 P67 Alarm output connector option 1 NO Normally Open 2 NC Normally Closed 3 Common 4 Common SVX9002 9 2 Service Manual Revision 02 Servo i Ventilator System Diagrams Functional Main Blocks diagram E EXPIRATORY SECTION ty Ap fp A PC1786 EXP CHANNEL CASSETTE EXPIRATORY CASSETTE EXPIRATORY CHANNEL MA EXPIRATORY EXP VALVE ONE WAY 0 O A VALVE NEL CONNECTION FROM REAR FOR PC INSP PRESS SERVICE BE Op CELL QO es INSPIRATORY PIPE SAFETY VALVE SAFETY VALVE 0 CONNECTOR USER PULL
18. position Locking levers mounting devices 20 Serial number label The serial number stated on and some other items are shown in the illustration this label is the ID number of the User Interface above This serial number must always be refered to M E E when ordering service spare parts etc for the py E User Interface 2 Fixed keys for immediate access to special MOS For further information regarding operation of the User Interface refer to the User s manual 2 4 Service Manual Revision 02 Servo i Ventilator System Introduction SVX9013 N a D x lt gt n When the front panel section is removed from the rear cover the following parts are accessible 1 Touch screen assembly front cover frame included TFT Display Backlight lamps PC board Backlight inverter PC 1777 Panel including PC Card slot Loudspeaker Main rotary dial rotary encoder with switch E ge E Direct access controls rotary encoder Revision 02 Service Manual 2 5 Introduction Servo i Ventilator System CA IL SVX9014 Patient Unit The Patient Unit can be rotated on and pulled out of 10 Control cable connector the Servo i Mobile cart It can also be mounted onto ar E ETE E Servo Chel bace 11 alg port for data communication Items accessible from the outside of the Patient Unit 12 Expiratory outlet are shown in the illustration above 13 Inspiratory section cover Connector for extern
19. release button to the right 3 Remove the tool LO ce o x gt ep Continue to push the release button until the Battery module snaps out 5 Pull out the Battery module SVX9086 Control cable The control cable connectors must be connected carefully to avoid damages on the connector pins e Carefully find the correct position the connector pins and the guides in the connectors must correspond Do not turn the connector while inserting e When correct position is found insert the connector e Secure the connector with its locking ring The illustration shows the Patient Unit connector but the procedure for the User Interface connector is the same SVX9061 Service Manual Revision 02 IN I bh 00 Servo i Ventilator System Only personnel trained and authorized by Maquet shall be permitted to perform installation service or maintenance of the Servo i Make sure to prepare the Servo i properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards After any installation maintenance or service intervention in the Servo i perform a Pre use check Refer to the Servo i Ventilator System User s Manual for details Revision 02 S
20. the Servo i perform a Pre use check Refer to the Servo i Ventilator System User s Manual for details Revision 02 Preventive maintenance 7 Preventive maintenance o A A 7 2 Preparations arscnouencuneadetewneayeemamentoneaeceaneuieetteanenyes 7 2 A 7 2 Preventive maintenance ccceceeeeeeeeeeeteeeeeees 7 3 Maintenance kit 5 000 hours ceeeeeeee es 7 3 Performing the Preventive maintenance 7 3 Service Manual 7 1 Preventive maintenance Servo i Ventilator System General e A Preventive maintenance must be performed at least once every year as long as the unit is not used more than normal Normal operation is estimated to correspond to approx 5 000 hours of operation The Battery modules shall be replaced every three years The internal Lithium batteries on PC 1771 and PC 1772 shall be replaced every five years After or in combination with performing the Preventive maintenance described in this chapter a Routine cleaning and an Extended cleaning of Inspiratory channel must be performed For cleaning procedures refer to the Servo i Ventilator System User s manual In some parts of the Preventive maintenance as described in this chapter access to the Field Service System FSS is required Some optional equipment used with the Servo i but not covered by this Service Manual may also demand maintenance actions Refer to the optional equi
21. the recommended actions the FSS will make troubleshooting faster and easier Check if the fault remains after each performed service action Re run the complete Pre use check or run the concerned test using the FSS Text within brackets refers to the tested subsystem BRE Breathing MON Monitor PAN Panel Test description Recommended action if the test fails Internal technical tests e SW check e Reading EEPROM During system start up e Checksum EEPROM e Panel button stuck test e Audio test BRE MON PAN Start Pre use check Audio test MON PAN Internal tests Alarm output connector test Performed only if this option is installed MON Power failure test MON Revision 02 Service Manual Restart the unit Do not touch the User Interface during system start up Interfering with the knobs keys touch screen loudspeaker grid etc may affect the internal technical tests 2 Reinstall the System SW If possible check the Test results log in the More detailed mode FSS If the audio test failed 1 Make sure that the Patient Unit main cover and the User Interface rear cover are correctly mounted Otherwise the audio tests may fail 2 Check in the Test results log FSS if it was the Panel test or the Monitoring test that failed e If the Monitoring test failed Replace PC 1772 Monitoring e lf the Panel test failed Replace the loudspeaker or
22. too low user default configurations made via the Field Service System FSS and Pre use check results including transducer calibrations will be erased The lithium batteries must be replaced after 5 years PC 1772 Monitoring Functional Main Blocks diagram marking M The main block Monitoring comprises microprocessor uP calculation of parameters and monitoring of alarm limits with control of alarms as well as back up alarm The main block Monitoring cooperates with the Loudspeaker in the User Interface The PC 1772 Monitoring handles all supervision and alarms in the system It activates pressure reducing mechanisms including activation of the safety valve in case of excessive breathing system pressure All alarms are conveyed and displayed on the front panel and the alarm sound is also generated In case of malfunction in the loudspeaker located on PC 1777 Panel a back up sound generating device buzzer on PC 1772 will be activated automatically This buzzer is monitored by a microphone at startup and during the Pre use check The following voltages are supervised o 24 V e 12V e 12V e 5V e 3 3 V Revision 02 Servo i Ventilator System The buzzer on PC 1772 Monitoring generates the alarm signal in case of 5 V or 3 3 V power failure The buzzer and 5 V 3 3 V failure logic is powered by back up capacitors in case of power failure The alarm signal used by the optional Alarm output connection is
23. valve temperature sensor The temperature of the supplied gas is measured by the Inspiratory Valve Temperature Sensor This sensor is situated in the gas flow The output signal from this sensor is used to compensate for the gas density variations due to temperature Supply pressure transducer The pressure of the supplied gas is measured by the Supply Pressure Transducer The output signal from this transducer is amplified It is then used to calculate the absolute pressure of the gas to compensate for gas density variations due to pressure Flow transducer The gas flows through a net resistance which Causes a pressure drop The pressure is measured on both sides of this net and the differential pressure value is then amplified Description of functions Nozzle unit The plastic Nozzle Unit contains a valve diaphragm The valve diaphragm controlled by the Inspiratory Solenoid regulates the gas flow through the Gas Module The complete plastic nozzle unit must be replaced during the Preventive maintenance After replacement allow the diaphragm to settle during approx 10 minutes before gas pressure is connected to the Gas Module Inspiratory solenoid The gas flow through the Gas Module is regulated by the Inspiratory Solenoid via the Nozzle Unit The current supplied to the solenoid is regulated so that the gas module will deliver a gas flow according to the settings on the User Interface Gas module key
24. when replacing PC 1770 a spare part that is factory programmed for the concerned ventilator must be used For further information refer to chapter Description of functions 4 12 SeviceManual Revision 02 Servo i Ventilator System SVX9047 SVX9048 SVX9050 Revision 02 Disassembling and assembling Inspiratory channel Removal of the inspiratory channel as well as replacement of O cell filter is described in the User s manual chapter Maintenance Safety valve membrane To remove the safety valve membrane e Remove the inspiratory channel e Release the latches 1 one on each side of the safety valve housing and lift off the membrane holder 2 e The membrane 3 and the valve seat 4 are now accessible e g for inspection and cleaning PC 1780 Pneumatic back plane To remove PC 1780 e Remove the inspiratory channel including filter for the inspiratory pressure transducer e Remove the screws 1 e Carefully lift the mounting plate 2 and disconnect the O cell connector and the safety valve pull magnet connector from PC 1780 e Lift off the mounting plate 2 The safety valve pull magnet is mounted on this plate e Pull out the gas modules to disconnect them from PC 1780 e Remove the threaded studs 3 e Disconnect and lift off PC 1780 4 Note When assembling the mounting plate 2 must be adjusted to correspond with the inspiratory channel latche
25. 4 60 V underrange is present 1 Replace PC 1778 DC DC amp Standard Connectors Expiratory cassette Technical error in Expiratory cassette or in the 1 Replace the expiratory cassette communication with the cassette Replace PC 1785 Expiratory channel If the technical alarm Expiration flow meter connector Exp cassette power failure is logged together with error code Technical error in Expiratory cassette see recommended action for this specific fault If technical alarm Expiration flow meter Exp cassette power failure is present 1 Replace PC 1778 DC DC amp Standard Connectors Replace PC 1784 Expiratory channel Technical error in Expiratory cassette Revision 02 Service Manual 6 17 Troubleshooting Servo i Ventilator System Notes 6 18 Service Manual Revision 02 Servo i Ventilator System Only personnel trained and authorized by Maquet shall be permitted to perform installation service or maintenance of the Servo i Make sure to prepare the Servo i properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a log book Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards After any installation maintenance or service intervention in
26. 6 15 Troubleshooting Servo i Ventilator System Error Error message Possible cause Recommended action code 20004 PANEL_AUDIO_FAILED 1 Restart the unit Do not touch the User Interface during system start up Interfering the knobs keys touch screen loudspeaker grid etc may affect the internal technical tests 2 Check that System SW V1 03 00 or later is installed Update System SW if required 3 Replace the loudspeaker 4 Replace PC 1777 Panel 20005 PANEL_PERSISTENT_CHECKSUM_ERR 1 Replace PC 1772 Monitoring Communication error between PC 1777 Panel 1 Restart the ventilator and perform a Pre use and PC 1772 Monitoring check 2 Check the Control cable that connects the Patient Unit with the User Interface 3 Replace PC 1778 DC DC amp Standard connectors 4 Replace PC 1772 Monitoring 2 O O E ab gt p n L qu 10 0b xX 6 16 Service Manual Revision 02 Servo i Ventilator System Troubleshooting Error Error message Possible cause Recommended action code Expiratory Flow Meter 40001 Technical error in Exp flow meter Replace the expiratory cassette If the technical alarm Expiration flow meter 2 Replace PC 1784 Expiratory channel PC 1784 60 V underrange is logged together with error code 40001 see recommended action for this specific fault 3 Replace PC 1785 Expiratory channel connector If technical alarm Expiration flow meter PC 178
27. 7 Maintenance kit 5 000 hours 7 3 Menu key 5 4 Mobile cant 2 2 2 3 Module unit 2 6 2 7 3 10 4 10 Monitoring SW 2 9 N N26 connector 9 2 N27 connector 9 2 N28 connector 9 2 N29 connector 9 2 N70 connector 9 2 Non volatile memory 3 2 Revision 02 Index O O cell 2 8 3 4 On Off switch 2 4 Option Upgrade 5 6 Optional equipment connector 2 6 9 2 Optional PC board slots 3 10 P P67 connector 9 2 Panel holder 2 4 Panel SW 2 9 Patient Unit 2 2 4 8 PC 1770 Main back plane 2 7 3 7 4 12 PC 1771 Control 2 7 3 8 4 9 PC 1772 Monitoring 2 7 3 8 4 9 PC 1775 Plug and play back plane 2 7 3 9 4 10 PC 1777 Panel 2 5 3 2 4 3 4 4 PC 1778 DC DC amp Standard connectors 2 7 3 9 4 11 PC 1780 Pneumatic back plane 2 7 3 5 4 13 PC 1781 Expiratory pressure transducer 3 7 PC 1781 Inspiratory pressure transducer 3 7 PC 1784 Expiratory channel 2 7 3 8 4 9 PC 1785 Expiratory channel connector 2 7 3 7 4 15 PC 1786 Expiratory channel cassette 2 8 PC 1789 Remote alarm connector 2 7 4 12 PC boards 4 2 PC card slot 2 4 Power supply 3 9 Pressure transducer 3 7 Pre use check Troubleshooting 6 3 Preventive maintenance 1 5 R RAM 3 2 Recycling 1 4 RS 232 2 6 RS232 connector 9 2 Service Manual 8 3 Index Servo i Ventilator System S U Safety inspection 7 6 Ultrasonic flowmeter 2 8 Safety valve 2 8 3 5 User Interface 2 2 2 4 4 3 7 6 Safety valve membrane 4 13 User Interface co
28. MAQUET Servo i Ventilator System Service Manual CRITICAL CARE 2 GETINGE Servo i Ventilator System Important Notes 1 200 Service Manual Revision 02 Important Contents LIMBO Cascais 2 Introduction cccecccccnccsnccencccessnesss 3 Description of functions 4 Disassembling and assembling 5 Service procedures mmmmoncononcononon 6 Troubleshooting omomcocononconononoas 7 Preventive maintenance 8 0 0 A 9 Diagrams sis Revision 02 Service Manual Servo i Ventilator System EE E DE LGI GEERS GE DE EE Servo i Ventilator System Important General e Service documentation for the Servo i Ventilator System consists of User s manual The User s manual is an indispensable complement to the Service Manual for proper servicing Service Manual Installation Instructions Spare Parts information Documentation for all optional equipment included in the Servo i System is also available The Servo i Ventilator System is referred to as the Servo i troughout this manual There are two serial number labels on the unit One label is attached to the Patient Unit close to the supply gas inlets The serial number stated on this label is the ID number of the Patient Unit The serial number is also stored in the SW memory as the System ID One label is attached t
29. MUFF INTERFACE MAGNET PNEGAIATIC a BACK PLANE CXM g O AIR O2 5 PRESSURE GAS INLET JO T TRANSDUCERS Ee 2 O PC1780 a PC1778 Aa DC DC amp STANDARD PATIENT CONNECTORS la UNIT E CAN BUS De e PC1770 CONTROL ad N PC1771 CONTROL Pam sena EP a 00 N9 P9 SUPPLY 5 M PC1772 MONITORING ae e BP P21A B Q gt PS1 X Ix Qx ee ee ee a AC DC O E CONVERTER PC1789 REMOTE ALARM CONNECTOR Qe Ee QUAN AAA ES F E P66 ALARM OUTPUT FUNCTIONAL MAIN BLOCKS ALARM OUTPUT CONNECTOR L CONTROL BEREEREEBEEBEEHEEHEHEHEHEHEEREEHEEHEEHEHEHEEREEHEHEEREHEHEHBSEBEeBEeEeBEHeEHeEeEeEeEeEeeeeeeee E a a EXPIRATORY SECTION NEBULIZER eres al z EXPIRATORY CHANNEL TOES T OPTIONAL O INSPIRATORY SECTION OPTIONAL MODULES LP a MONITORING En Pa POWER SUPPLY e e paa dect PBI a R MN PRESSURE TRANSDUCERS Boe el Ht USER INTERFACE P7 N7 a 1 1 32 P7 N7 Nw 9 OPTIONAL PC BOARD SLOT a laa pane Baa rm INTERNAL AMBOS Lo FAN o pa Dad CONNECTOR ban PC1775 CONNECTOR a PLUG INCLUDING C AN BUS i fP35 ae ID PROM COMMUNICATING ree eee eet epee E PLAY CONVERTER WITH MONITORING al BACK PLANE ED COOLING AIR FLOW SVX9000 04 04 19 MICRO PROCESSOR Revision 02 Service Manual 9 3 MAQUET Critical Care AB SE 171 95 Solna Sweden Phon
30. Manual isi Servo i Ventilator System Disassembling and assembling User Interface To separate the front panel section from the rear cover e Disconnect the control cable 1 e Remove the screws 2 e Lift off the rear cover from the front panel section All parts inside the front panel section are now accessible With power supply connected to the Servo i there are energized electrical components inside the unit e g the backlight lamps that are supplied with 660 V by the Backlight Inverter All personnel must exercise extreme caution if fault tracing or adjustments are performed with power supply connected and with the user interface rear cover removed SVX9020 The main parts of the User Interface are e Rear cover 3 e PC 1777 Panel 4 e Backlight Inverter 5 e Support plate 6 e TFT Display 7 including Backlight lamps e Touch screen assembly 8 SVX9021 Revision 02 Service Manual 4 3 Disassembling and assembling Servo i Ventilator System 2 2 PC 1777 Panel thins To remove PC 1777 Panel 1 e Carefully disconnect all cable connectors from PG 1777 e Remove the screws 2 holding PC 1777 e Lift off PC 1777 Note When replacing PC 1777 Panel it can be necessary to re install the System SW For further information refer to section Replacing PC boards in this chapter SVX9022 Backlight Inverter To remove the PC board Backlight Inverter 3 e Carefully disco
31. ONE COMEN rsraroeonea picada de sseniel suecos PC 1771 PC 1772 and PO 1784 senscocaionena AC DC Converter cccccssescceseseseeeesenseeeeseees Module unit including PC 1775 PC 1778 DC DC amp Standard connectors 4 11 Internal A 4 11 PC 1789 Remote alarm connector 0 4 12 PC 1770 Main back plane cccceeeeees 4 12 Inspiratory channel cccscccsseeessseeeeeeseeees 4 13 Safety valve membrane cccccsseceeseeeeeeeees 4 13 PC 1780 Pneumatic back plane 4 13 Gas MOQUI S R 4 14 PC 1785 Expiratory channel connector 4 15 Expiratory valve Coll cc cscccsseecseeeseeeeseees 4 15 Expiratory cassette membrane 0 cccee 4 16 Fixed battery module cccccceeeeeeeeeeeeees 4 18 A o soscecrictsnnctstesedencsasseueresgacuSecemacusnaers 4 18 Revision0O2 Service Mama A Disassembling and assembling General Disassembling of the main units in the Servo i System is described in this chapter If not stated otherwise the assembling procedure is the reverse of the described disassembling procedure The illustrations in the Servo i Spare Parts List are very useful as a guide when disassembling and assembling the Servo i System Preparations Before disassembling or assembling the Servo i e Set the On Off switch on the User Interface to Off e Disconnect the mains power cable e Disconnect the gas supplies wall and
32. Ventilator System Patient Unit Front cover To remove the Patient Unit front cover 1 e Remove the screw covers and the screws 2 e Remove the two ventilation covers 3 e Remove the two screws 4 SVX9042 SVX9043 e Carefully lift off the Patient Unit front cover 1 Note When assembling the unit make sure that the inspiratory and expiratory pressure transducer tubes and the PC 1785 and expiratory valve coil cables are not damaged by the Patient Unit front cover 1 With power supply connected to the Servo i there are energized electrical components inside the unit All personnel must exercise extreme caution if fault tracing or adjustments are performed with power supply connected and with the Patient Unit front cover removed Y Y o o x lt gt N 4 8 Service Manual Revision 02 Servo i Ventilator System Disassembling and assembling PC 1771 PC 1772 and PC 1784 e Remove the Patient Unit front cover e PC 1771 Control 1 Release the locks on the PC board guides Carefully pull out the PC board e PC 1772 Monitoring 2 Disconnect PC 1789 cable connector 3 This is the cable for the optional PC 1789 Remote alarm connector Release the locks on the PC board guides Carefully pull out the PC board e PC 1784 Expiratory channel 4 Disconnect pressure transducer tubes 5 and 6 Disconnect PC 1785 cable connector 7 Disconnect Exp valve coil cable c
33. a of the User Interface e Discard all other label strips SVX9028 Fixed keys label e Insert the fixed keys label strip 2 e Check its position through the button windows of the front panel film Adjust if necessary Align the label strip with great care Once installed the process cannot be reversed SVX9029 SVX9030 LI Service Manual Revision 02 Servo i Ventilator System Disassembling and assembling e While holding the label strip in correct position remove the protective foils 8 and 4 e Press the label strip against the adhesive area SVX9031 SVX9032 e Remove the protective foil 5 e Press the front panel film 6 firmly against the front panel to ensure proper adhesion SVX9033 SVX9034 Special functions keys label e Insert the Special functions keys label strip 7 e Check its position through the button windows of the front panel film Adjust if necessary Align the label strip with great care Once installed the process cannot be reversed SVX9035 e While holding the label strip in correct position remove the protective foils 8 and 9 SVX9036 e Press the label strip against the adhesive area e Remove the protective foil 10 e Press the front panel film 11 firmly against the front panel to ensure proper adhesion SVX9038 SVX9039 Revision 02 Service Manual 4 7 Disassembling and assembling Servo i
34. al 12V DC power supply 19 Serial number label The serial number stated on Fuse F1 for external 12V DC power supply this label is the ID number of the unit This serial 1 Handle 2 Gas inlet for Air ad cul 15 Module unit for connecting optional modules 3 Gas inlet for O e g up to six Battery modules 4 Equipotentiality terminal 16 Connector for Servo Ultra Nebulizer Servo i 5 Mains supply connector incl fuses F11 and F12 17 Inspiratory outlet 6 Internal fan with filter 18 Alarm output connector optional T 8 g number must always be refered to when ordering service spare parts software updates upgrades etc Optional connector 2 6 Service Manual Revision 02 Servo i Ventilator System Introduction When the Patient Unit front cover is removed the following parts are accessible 1 PC 1772 Monitoring 2 PC 1771 Control 3 PC 1784 Expiratory channel with the two connected PC 1781 Inspiratory and Expiratory Pressure Transducers 4 Expiratory valve coil Module unit including PC 1775 Plug and play back plane AC DC Converter Internal fan Mains supply inlet PC 1778 DC DC amp Standard connectors 0 PC 1785 Expiratory channel connector 4 E E E PC 1789 Remote alarm connector optional not shown in the illustration SVX9045 a 12 The PC boards as listed above are directly or indirectly connected to the PC 1770 Main back plane 13 The gas modules th
35. al equipment e N28 Control cable e N29 RS232 Pin configuration and signal names can be found in chapter Diagrams Includes an ID PROM The ID information can be read by the Servo i System PC 1775 Plug and play back plane Connects the Optional Modules that are inserted in the Module Unit PC 1775 also controls e Charging discharging of the Battery modules e Switching between Mains Battery External 12 V power supply e Internal fan using input signals from the Temperator sensor in the O cell connector Includes an ID PROM The ID information can be read by the Servo i System Description of functions Module unit Connection slots for 6 optional modules e g Battery modules or CO Analyzer module Internal fan The Internal Fan forces cooling air through the Patient Unit The cooling air flow inside the Patient Unit is indicated in the Functional Main Block Diagram The cooling air outlets are located in the expiratory section The Internal Fan is controlled by the Temperature Sensor in the O cell connector via electronics on PC 1775 Plug and play back plane The fan will start with half effect at approx 33 C 91 F and with full effect at approx 43 C 109 F When the temperature drops below approx 37 C 99 F the fan turns to half effect and when the temperature drops below approx 27 C 81 F the fan stops The air inlet is protected by a filter that must be
36. an create leakage in the cassette SVX9058 e Place the membrane onto the cassette as shown in the illustration SVX9057 Service Manual Revision 02 IN I O Servo i Ventilator System o o S oO x lt gt 0 SVX9058 Revision 02 Disassembling and assembling e Squeeze the retaining ring pliers and carefully press the membrane in place into the cassette as shown in the illustration e Carefully release and remove the retaining ring pliers e Check that the membrane is not deformed by the retaining ring If necessary remove the membrane and redo the complete mounting procedure e Mount the expiratory cassette onto the Patient Unit e Reset the operating capacity meter after replacement of the membrane To access the reset button select Menu Biomed Service Note If the metal washer has been separated from the membrane it is important that the washer is correctly mounted The washers raised hub 1 must be facing outwards as shown in the adjacent illustration Service Manual 4 17 Disassembling and assembling Servo i Ventilator System Fixed battery module If the upper slot in the Module unit is equipped with a latch a tool and two hand operation is required to remove the Battery module To release the fixed battery module 1 Push a suitable tool e g a small hexagonal wrench or a screwdriver through the hole as shown in the illustration 2 At the same time push the
37. ane buttons Press all membrane buttons Barometric pressure e Select Status General on the User Interface Check that the Barometric pressure value shown on the User Interface corresponds to the actual Barometric pressure value at the local site The value shown on the User Interface may not differ more than 5 from the actual barometric pressure e f the value shown on the User Interface differs more than 5 from the actual barometric pressure the barometer in Servo i must be calibrated FSS is required Gas supply pressure transducers e Connect the gas supplies Air and O e Select Status General on the User Interface e Disconnect the gas supply one gas at the time e Check that the corresponding supply pressure value in the Status window drops Service Manual Servo i Ventilator System Battery modules e Check the status of the Battery modules used Check the manufacturing date of the Battery modules Manufacturing date year week is printed on the battery label The batteries must be replaced after 3 years Check that the battery housing is not damaged Press the battery power symbol button and check that the green LEDs are lit All 4 LEDs must be lit if the battery is fully charged If required an extended check of the Battery modules can be performed This extended check is described in chapter Service procedures Lithium batteries e Check manufacturing date for the lithi
38. assembly The Touch screen implies the touch function of the front panel screen and is interactive with information displayed on the TFT Display The front panel frame with the touch screen membrane buttons and DIM sensor forms the Touch screen assembly and must be handled as one complete part The DIM sensor measures the ambient light and the screen brightness is automatically adjusted TFT Display with Backlight The TFT Display is a Thin Film Transistor Screen for color display of picture and alphanumeric data The Backlight consists of two fluorescent tubes lamps mounted behind the TFT Screen They are driven from the Backlight Inverter Estimated lifetime with acceptable brightness level for the lamps is 30 000 hours Using the Field Service System FSS a time meter for the lamps can be shown The time meter must be reset after replacement of the lamps Revision 02 Servo i Ventilator System Patient unit Inspiratory section Functional Main Blocks diagram marking l The main block Inspiratory Section conveys the breathing gas from its gas inlets for Air and O supply to the patient breathing system It comprises the following main functions e Gas Modules Air and O e Connector Muff e Inspiratory Pipe e O Cell e Temperature Sensor e Inspiratory Pressure Tube e Safety Valve incl pull magnet e Inspiratory Outlet e PC 1780 Pneumatic Back Plane Gas modules Air and O The Air and O Gas
39. battery capacity alarm is not activated within the specified time The operating time is dependent on the number of Battery modules connected refer to the Servo i Ventilator System User s manual Check that the time between the Limited battery capacity alarm and the No battery capacity alarm is more than 7 minutes SVX9063 Note All alarms are time stamped and stored They can be displayed in the Event log Allow the backup battery to recharge before clinical use of the Servo i For Charging time refer to the Servo i Ventilator System User s manual After any maintenance or service of the Servo i perform a Pre use check Refer to the Servo i Ventilator System User s manual 5 2 Service Manual Revision 02 Servo i Ventilator System Revision 02 Service procedures Replacing the lithium batteries on PC 1771 and PC 1772 The lithium batteries must be replaced after 5 years A Technical error message will appear on the screen if the battery voltage level is too low Always replace booth batteries at the same time to keep the same replacement date for both batteries Preparations e Set the On Off switch on the control unit to Off e Disconnect the mains power cable e Disconnect the gas supplies wall and or cylinder e Remove patient tubing Replacing the lithium battery e The lithium batteries are mounted on ESD sensitive PC boards Refer to chapter Disassembling
40. ce or maintenance must be noted in a log book A caueeee roeeeckaeon 2 9 Discard disposable replaced and left over parts ASRIEL ALALE E E E E E 2 9 in accordance with appropriate industrial and environmental standards AG E E ii o A 2 9 After any installation maintenance or service System ID A a ra 2 9 intervention in the Servo i perform a Pre use check Refer to the Servo i Ventilator System User s Manual for details Revision 02 Service Manual 2 1 Introduction SVX 001Xa User Interface Servo i Mobile Cart Servo i Ventilator System Main units The Servo i is available in different main configurations e Infant e Adult e Universal These main configurations are as standard equipped with a number of ventilation modes suitable for each patient category Further ventilation modes can be installed via software Option Upgrades The Servo i can be divided into the following main units e User Interface The User Interface contains all controls used to set the ventilation and monitoring parameters Ventilation parameters as well as other important information are shown on the User Interface display e Patient Unit The Patient Unit contains pneumatics and electronics for gas supply to the patient Power supply and battery back up is also contained in the Patient Unit The Control cable connects the User Interface and the Patient Unit The Servo i shown in the illustration is mounted onto t
41. created for each ventilator and can only be installed on this ventilator Serial number of the ventilator must be stated when ordering an Option Upgrade Software installation procedure Further information regarding the different softwares and the software installation procedure can be found in the Installation Instructions enclosed with the PC Cards The Installation Instructions is also available on the MAQUET Critical Care SW download web site Service Manual Servo i Ventilator System Field Service System General e The Field Service System FSS is a software provided to facilitate troubleshooting service and maintenance of the Servo i Ventilator System e To access the Field Service System a Service card PC Card and an access code must be used The access code is unique for each Service card e The Service card is personal and must not be handed over to anyone else e lt is only possible to access the Field Service System with the Servo i in Standby mode e The Field Service System must not be activated with a patient connected the Servo i Field Service System functions In the Field Service System it is possible to e Display information regarding the ventilator including options and parts installed e Calibrate the internal barometer e Display service and event logs e Run complete or selected test sequences e Create and save service reports e Export selected logs to a PC Card e Create user
42. default configurations Revision 02 Servo i Ventilator System Troubleshooting Only personnel trained and authorized 6 Troubleshooting by menue sell paraten to perom General syrena R 6 2 installation service or maintenance of the Servo i Pre use check ccccccccseeeceececseeeeeeeesaeeeceeeseeees 6 3 Make sure to prepare the Servo i properly before Technical error COd8S occccononocononocononnnnnonenonanos 6 11 disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted ina log book Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards After any installation maintenance or service intervention in the Servo i perform a Pre use check Refer to the Servo i Ventilator System User s Manual for details Revision 02 Service Manual 6 1 Troubleshooting Servo i Ventilator System Possible causes to malfunction not mentioned in the following troubleshooting guides are e The system has not been correctly assembled after cleaning maintenance or service e Disconnection or bad connection in cable connectors PC board connectors and interconnection boards e Disconnected or defective gas tubes These possible causes to malfunction must always be concidered during troubleshooting General Before starting troubleshooting try to eliminate all pos
43. e 46 8 730 70 00 www maquet com MAQUET Critical Care AB 2004 All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior permission of the copyright owner in writing Subject to alterations without prior notice Issued by MAQUET Critical Care AB SE 171 95 Solna Sweden Servo i Ventilator System Service Manual Order No 65 43 230 E407E Printed in Sweden Price group 7 0404 Revision 02 April 2004 English edition MAQUET 2 GETINGE
44. e O cell and the safety valve pull magnet are connected to the PC 1780 Pneumatic back plane Y o D x lt gt m Revision 02 Service Manual 2 7 Introduction Servo i Ventilator System The upper part of the Patient Unit contains the inspiratory section and the expiratory section The main parts of the inspiratory section are the 14 Two gas modules Air and O for regulation of the inspiratory gas 15 Connector muff 16 Inspiratory pipe with housings for the O cell and for the safety valve 17 O cell incl bacteria filter 18 Safety valve SVX9120 19 Temperature sensor inside the O cell connector 20 Inspiratory pressure transducer tube incl bacteria filter to connect the inspiratory pressure transducer The expiratory cassette 21 is a complete unit and must not be disassembled It contains the following parts e Expiratory inlet with moisture trap e PC 1786 Expiratory channel cassette E e Ultrasonic flowmeter e Heating foil to keep a stable temperature in the expiratory gas e Pressure transducer connection incl bacteria filter to connect the expiratory pressure transducer N N OQ XxX gt ep e Expiratory valve incl valve membrane e Expiratory one way valve The expiratory valve coil mounted under the expiratory cassette compartment controls the valve membrane in the cassette PC 1786 inside the expiratory cassette is electrically conn
45. e alarm is activated replace the Gas module O Replace PC 1771 Control Replace PC 1772 Monitoring Revision 02 Servo i Ventilator System Troubleshooting Test description Recommended action if the test fails Internal leakage test Revision 02 Checks the internal leakage with test tube connected using the inspiratory and expiratory pressure transducers Checks that the leakage at 80 cm H O is max 10 ml min If message Leakage or Excessive leakage appears 1 Check that the test tube is correctly connected Check the expiratory cassette Checks that the measured pressure values differs less than 5 cm H O between Insp and Exp BRE e Check that the cassette is correctly seated in the cassette compartment If possible replace the expiratory cassette and check if the new cassette is accepted by the Pre use check If the new cassette was accepted by the Pre use check the fault was located to the cassette To repair the old cassette check that the expiratory valve membrane is clean and correctly seated in the cassette Replace the membrane if required Check that the pressure transducer tubes filters are correctly mounted Check the inspiratory section e Check that the inspiratory pipe is correctly mounted in the inspiratory section Check that the safety valve membrane is clean and correctly seated in the inspiratory pipe Check that the safety valve closes prope
46. ected to PC 1784 Expiratory channel via PC 1785 Expiratory channel connector 2 8 Service Manual Revision 02 Servo i Ventilator System Servo i software structure PC1777 PANEL PANEL S W Pc1784 BREATHING his al hule al dd vaa SYSTEM ID PC1770 SW SVX9143 General The Servo i SW installed in the ventilator will contain all available system functionality The software is separated into different subsystems and stored on some of the PC boards The separation of the software is handled by the installation program The Servo i software is divided into the following software subsystems e Breathing e Monitoring e Panel e System ID Revision 02 Service Manual Introduction Breathing The Breathing SW controls the delivery of gases to the patient This subsystem is responsible for the breathing system that is e Ventilation control and regulation e Inspiratory channel e Expiratory channel e Nebulizer control software option The Breathing SW is stored on PC 1771 Control and PC 1784 Expiratory Channel New software can be installed via a System SW Update The System SW must be re installed if PC 1771 or PC 1784 is replaced The Breathing SW is executed by microprocessors on PC 1771 and PC 1784 Monitoring The Monitoring SW controls all monitoring and alarm functions in the system including trends of measured values Events such as alarms and change of settings will also be logged T
47. ement is also used when calculating the 22 mm 10 mm tube connector for the expiratory expiratory flow tube of the patient breathing system The inlet is designed to make condensed water drip out and allow use of a water trap for such water to be collected Expiratory inlet bacteria filter can be connected to protect the cassette from contamination Heating foil An electrical Heating Foil applied on the outside of the expiratory pipe where the Ultrasonic Flowmeter is situated The purpose of the Heating Foil to reduce condensation and maintain a stable temperature in the expiratory gas 3 6 Service Manual Revision 02 Servo i Ventilator System Bacteria filter and expiratory pressure tube Via a Bacteria Filter inside the cassette the Expiratory Pressure Tube connects the cassette to the Expiratory Pressure Transducer The filter and the connector are integrated parts of the cassette The filter protects the transducer on PC 1781 Pressure Transducer from contamination Expiratory valve The Expiratory Valve consists of a membrane in the cassette that is operated by the axis of the Expiratory Valve Coil The valve is fully open as long as no power Is supplied to the coil Operating capacity for the membrane is estimated to 10 000 000 breathing cycles When this limit is passed or if the membrane for some reason has become defective it must be replaced Refer to instructions in chapter Disassembling and assembling Remai
48. ervice procedures 5 Service procedures Checking the Battery modules 5 2 Replacing the lithium batteries on POG I771 and PG T772 arranca 5 3 Using the Menu and Biomed key 00000 5 4 Ney AAN q 5 4 A 5 4 Software installation ooocooonccccnconcnnconaninnononnoos 5 6 General usina A O E E 5 6 Software information cccccscccecsssseeeeseeseeeens 5 6 Software installation procedure 006 5 6 Field Service System ccccssscessseeeeeeeeeseeseeens 5 6 A e 5 6 Field Service System functions ccoocccccoo 5 6 Service Manual 5 1 Service procedures Servo i Ventilator System Checking the Battery modules Check the manufacturing date of the Battery module Manufacturing date year week is printed on the battery label The batteries must be replaced after 3 years Allow the Battery modules to charge until it is fully charged To display battery status Press the battery power symbol button on the battery All four LEDs must be lit SVX9062 Or Select Status General on the User Interface Check that Battery backup time is more than 30 minutes on the concerned battery With gas patient tubes and test lung connected let the Servo i run in a ventilation mode Disconnect mains power to the unit to allow battery operation Let the Servo i run in battery operation and check that the No
49. ery module is rated 12 V 3 5 Ah Battery backup time is approx 0 5 hour battery Up to six backup Battery modules can be connected to the Module unit SVX9019 Press the battery power symbol button to check the battery status The lit sections of the battery power scale show remaining capacity e f no section is lit the battery is fully discharged e g due to long storage time and requires up to 12 hours battery charging time e f one section is lit or flashing the battery requires approx 3 hours battery charging time The battery lifetime is limited and the batteries must thus be replaced after 3 years Manufacturing date year week is printed on the battery label Each battery includes an ID PROM The ID information can be read by the Servo i System CO Analyzer module optional The CO Analyzer module is an optional accessory that is connected to the Module unit The CO Analyzer option allows for continuous monitoring shown in a waveform capnogram and as numericals on the screen The CO Analyzer module is via a cable connected to a Capnostat sensor mounted on an airway adapter at the Y piece The sensor uses a solid state and IR based optical system with no moveable parts It measures the difference between a reference light beam and one filtered for CO wavelength The CO Analyzer function must be enabled in the configuration software Control cable This Control Cable connects the Patient U
50. f the Servo i Only Maquet genuine spare parts must be used PC boards spare parts must always be kept in a package for sensitive electronic devices Maquet will not otherwise assume responsibility for the materials used the work performed or any possible consequences of same e The device complies to standards and requirements as stated in the Servo i Ventilator System User s manual Service Manual 1 5 Servo i Ventilator System Important Environmental declaration Purpose This environmental declaration is for a Servo i basic unit including the carrier and one battery Letters codes within brackets refers to the Functional Block Diagram in chapter Diagrams Components with special environmental concern Components listed below shall be disposed of in an environmentally safe way Printed circuit boards e PC 1770 Main back plane e PC 1771 Control including a Lithium battery C e PC 1772 Monitoring including Lithium battery M e PC 1775 Plug and Play back plane P e PC 1777 Panel U e PC 1778 DC DC amp Standard connectors P e PC 1780 Pneumatic back plane l e PC 1781 Pressure transducer 2 pcs T e PC 1784 Expiratory channel F e PC 1785 Expiratory channel connector E e PC 1786 Expiratory channel cassette E e PC 1789 Remote alarm connector A Other electronics e TFT assembly including backlight U e Touch screen U e O cell containing Pb I e Air module containing m
51. g book provided It is recommended that maintenance and service is done as a part of a service contract with Maquet Preventive maintenance must be performed at least once every year as long as the unit is not used more than normal Normal operation is estimated to correspond to approx 5 000 hours of operation Details are found in this Service Manual chapter Preventive maintenance three years The Battery modules shall be replaced every The internal Lithium batteries on PC 1771 and PC 1772 shall be replaced every five years Worn out batteries must be recycled or disposed of properly according to local regulations Recycle facilities may not be available in all areas Batteries must not be disposed of with ordinary waste Discard all other disposable replaced and left over parts in accordance with appropriate industrial and environmental standards When working with ESD sensitive components always use a grounded wrist band and a grounded work surface Adequate service tools must always be used Revision 02 fs X A A Servo i Ventilator System If any significant difference is found between the product and this document please contact Maquet for further information e We reserve the right to modify products without amending this document or advising the user Only personnel trained and authorized by Maquet shall be permitted to perform installation service or maintenance o
52. gas supply pressure Air and O is within the specified range Replace the O cell Replace the gas modules Replace one gas module at a time Replace PC 1771 Control Replace PC 1772 Monitoring Revision 02 Servo i Ventilator System Troubleshooting Test description Recommended action if the test fails Flow transducer test Battery switch test Revision 02 Checks the inspiratory flow transducer Calibrates and checks the expiratory flow transducer Calibrates at 60 O and checks at 100 and 21 O As different gas mixtures are used during this test calibration of the expiratory flow transducer will only be performed if both gases are connected The check using the connected gas 100 alt 21 O will however be performed The Flow transducer test will pass if the result of this check corresponds to the old calibration factor from a previous Pre use check The same expiratory cassette must be used The new calibration factor for the expiratory flow transducer may not differ more than 10 to 15 from factory calibration During this test the different subsystems concerned are compared The difference between the subsystems must not be more than 0 3 l min BRE MON Checks that the power supply switches to battery when mains power is disconnected Checks that the power supply switches back to mains power when re connected This test will not be performed if e Less than
53. he Monitoring SW is stored on PC 1772 Monitoring New software can be installed via a System SW Update The System SW must be re installed if PC 1772 is replaced The Monitoring SW is executed by the microprocessor on PC 1772 Panel The Panel SW controls all user interaction as well as software updating to all subsystems via the PC Card interface The Panel SW is stored on PC 1777 Panel New software can be installed via a System SW Update The System SW must be re installed if PC 1777 is replaced The Panel SW is executed by the microprocessor on PC 1777 System ID The System ID SW is a configuration file stored on PC 1770 Main Back Plane that is unique for each ventilator The System ID SW will enable the functions selected for this ventilator To change the functions of the ventilator a new System ID S W can be installed via an Option Upgrade When replacing PC 1770 Main Back Plane a spare part that is factory programmed for the concerned ventilator must be used Introduction Servo i Ventilator System Notes 2 10 Service Manual Revision 02 Servo i Ventilator System Description of functions 3 Description of functions Only personnel trained and authorized by Maquet shall be permitted to perform Tm About this Chapter occcconcoccnccccncoconcononcnananonon installation service or maintenance of Memory types used in the Serv
54. he optional Servo i Mobile cart Service Manual Revision 02 Servo i Ventilator System A number of optional equipment can be added to the Servo i Ventilator System For further information refer to the documents listed below Servo i Mobile cart e Mobile cart with drawers e Mobile cart without drawers e Mobile cart for Compressor Mini Refer to e Servo i User s Manual e Servo i Mobile cart Installation Instructions Servo Ultra Nebulizer Servo i Refer to e Servo i User s Manual e Servo Ultra Nebulizer Servo i Installation Instructions Compressor Mini Refer to e Servo i User s manual e Compressor Mini Operating Manual e Compressor Mini Service Manual e Compressor Mini Installation Instructions Servo i Holder Refer to e Servo i User s Manual e Servo i Holder Installation Instructions Servo i Shelf base Refer to e Servo i User s Manual e Servo i Shelf base Installation Instructions Support Arm 177 e Servo i User s manual e Support Arm 177 Installation Instructions Revision 02 Service Manual Introduction Gas trolley e Servo i User s manual e Gas trolley Installation Instructions Gas cylinder restrainer e Servo i User s manual e Gas cylinder restrainer Installation Instructions IV Pole Servo i e Servo i User s manual e IV Pole Servo i Installation Instructions User Interface panel cover e
55. ient circuit Check for transducers leakage or replace the patient circuit Checks that the leakage at 50 cm H O is max 80 ml min Will allow the system to calculate a compensation for circuit compliance if the leakage requirements are met BRE Alarm state test Checks that no Technical error alarms Refer to section regarding Technical are active during the Pre use check error alarms for further information MON External alarm system If the option Alarm Output Connector is 1 Check the external alarm system test enabled the user can test the external alarm system 2 Replace PC 1789 Remote alarm connector The external alarm output signal is activated and the user must verify the external alarm The result of the test does not affect the outcome of the Pre use Check 6 10 Service Manual Revision 02 Servo i Ventilator System Troubleshooting Technical error codes The table below shows recommended actions in Some of the Error codes are intended only for case of Technical error alarms R amp D not for field service If so the text N A is stated in the Recommended action column Error Error message Possible cause Recommended action code 1 POWER_FAILURE_MINUS_12_VOLTS_ Replace PC 1778 DC DC amp Standard TOO_LOW i e lt 13 2 V Connectors POWER_FAILURE_MINUS_12_VOLTS_ 1 Check status of external battery if TOO_HIGH i e gt 10 8 V connected 2 Replace PC 1778 DC DC a
56. l trained and authorized Index by Maquet shall be permitted to perform W Alfabetic index cccescesesssessesessersessersesseereestens 8 2 installation service or maintenance of the Servo i Make sure to prepare the Servo i properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted ina log book Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards After any installation maintenance or service intervention in the Servo i perform a Pre use check Refer to the Servo i Ventilator System User s Manual for details Revision 02 Service Manual 8 1 Index Servo i Ventilator System A AC DC Converter 2 7 3 9 4 9 Alarm output connector 2 3 2 6 3 10 9 2 Assembling guidelines 4 2 B Backlight inverter 2 5 3 2 4 3 4 4 Backlight lamp 2 5 4 3 4 5 Bacteria filter for O cell 7 4 Barometric pressure 7 6 Battery module 1 5 2 3 3 10 4 18 5 2 7 2 7 6 Biomed key 5 4 Breathing SW 2 9 C Cable reel 2 4 CO Analyzer module 2 3 3 10 Compressor Mini 2 3 Connector muff 2 8 3 4 4 14 Control cable 2 4 3 10 4 18 Control cable connector 2 6 D Direct access control 2 5 Direct access knobs 2 4 E EEPROM 3 2 Environmental declaration 1 6 Equipotentiality terminal 2 6 ESD sensitive components 1 4 Expiratory ca
57. le only in Standby mode Default Alarm limits can be changed in this window Adult alarm limits and Infant alarm limits e Pressure Upper alarm limit e Minute Volume Lower and Upper alarm limit e Respiratory Rate Lower and Upper alarm limit e End Exp Pressure Lower alarm limit e End Tidal CO Lower and Upper alarm limit e Apnea time Upper alarm limit Default configuration regarding General and Units cannot be changed in this window Access to the Field Service System FSS is required Displayed values The Measured value boxes on the User Interface shows different parameters Some of these parameters are fixed and some are selectable in this window NIV adult alarms and NIV infant alarms e Pressure Upper alarm limit e Minute Volume Lower and Upper alarm limit e Respiratory Rate Lower and Upper alarm limit e End Exp Pressure Lower alarm limit e End Tidal CO Lower and Upper alarm limit The alarms listed above except Pressure alarm can be permanently silenced in this window Default configuration regarding General and Units cannot be changed in this window Access to the Field Service System FSS is required Copy configuration Available only in Standby mode Default user configuration can be copied to from a PC Card Default configuration regarding General Units and Alarm limits will be copied Useful when applying the same user configurati
58. lly within 10 17 mV in normal air and at standard barometric pressure during the life time of the cell The life time of the cell is affected by the O concentration With a concentration at the cell in and expected cell life time in hours the following applies at 25 C 77 F O Conc x Expected cell life 500 000 hours The O cell is automatically calibrated each time a Pre use check is performed if O is connected to the ventilator If the ventilator has continually been in use for a long time the measured O concentration may drop due to normal degradation of the O cell This will activate a nuisance alarm For further information refer to the User s manual chapter section O cell adjustment Note Pre use check is recommended to use to calibrate the O cell An ID PROM is integrated into each O cell Its ID information and remaining lifetime can be read by the Servo i Revision 02 Servo i Ventilator System Temperature sensor A Temperature Sensor is integrated into the connector on top of the O Cell This sensor measures the temperature inside the Inspiratory Section The output signal corresponding to the temperature in the Inspiratory Section is used for regulation of the Internal Fan The electronics for this regulation is located on PC 1775 Plug and play back plane Inspiratory pressure tube The Inspiratory Pressure Tube connects the Inspira tory Pipe with the Inspiratory Pressure Tran
59. mp Standard Connectors Replace PC 1775 Plug and play back plane POWER_FAILURE_12_VOLTS_TOO_LOW Check status of external battery if connected Replace PC 1778 DC DC amp Standard Connectors Replace PC 1775 Plug and play back plane POWER_FAILURE_24 VOLTS TOO LOW Replace PC 1778 DC DC amp Standard Connectors 2 Replace the gas modules Replace one gas module at a time and check that this technical error code will not appear POWER_FAILURE_24 VOLTS TOO HIGH Replace PC 1778 DC DC amp Standard Connectors T INSP_VALVE_RANGE_ERR Replace PC 1771 Control 2 Replace PC 1772 Monitoring 3 Replace the gas modules Replace one gas module at a time and check that this technical error code will not appear TECH_ERR_INSP_PAUSE_HOLD_TIME_ 1 Replace PC 1771 Control EXCEEDED TECH_ERR_EXP_PAUSE_HOLD_TIME_ 1 Replace PC 1771 Control EXCEEDED Revision 02 Service Manual 6 11 Troubleshooting Servo i Ventilator System Error Error message Possible cause Recommended action code VALVES_DISABLED Replace PC 1784 Expiratory channel Replace PC 1771 Control Replace PC 1778 DC DC amp Standard Connectors Replace PC 1772 Monitoring SAFETY_VALVE_OPEN Check inspiratory channel Replace safety valve pull magnet Replace PC 1784 Expiratory channel BRE_NODE_DISCON E PC 1771 Control PANEL NODE DISCON Check the control cable Replace PC 1777 Panel Replace PC 1778 DC DC amp Standard Con
60. nectors ok h h O 1 hh Note This error indicates communication failure between PC 1777 and PC 1772 and the error code will thus not be shown on the display but will be logged s paeo ooer WA 7 or row ua noveo conar NA O T 6 12 Service Manual Revision 02 Servo i Ventilator System Troubleshooting Error Error message Possible cause Recommended action code 25 TECH_ MON_DEVICE_COMM_ERR Depending on ID If repeated replace parts as follows Report to MCC HSC for further information PC 1772 Monitoring PC 1775 Plug and play back plane PC1778 DC DC amp Standard Connectors PC 1781 Inspiratory pressure transducer PC 1781 Expiratory pressure transducer O2 cell or O2 cell cable or PC 1772 Monitoring PC 1784 Expiratory channel or PC 1772 Monitoring Gas module Air or PC 1772 Monitoring 34 Gas module O2 or PC 1772 Monitoring 35 PC 1772 Monitoring 256 PC 1771 Control 512 PC 1777 Panel 784 N A 27 TECH_ERR_BUZZER_FAILURE 1 Replace PC 1772 Monitoring hi Note If the Patient Unit front cover is removed this error may be activated 28 PANEL_AUDIO_FAIL 1 Replace the loudspeaker 2 Replace PC 1777 Panel Note If the User Interface rear cover is removed this error may be activated 34 PANEL_NODE_CONNECT_TIMEOUT 1 Check the control cable 2 Replace PC 1777 Panel 3 Replace PC 1778 DC DC amp Standard Connectors Note This error indicates communication failure
61. ning operating capacity in for the membrane can be shown in the Status window Select Status Exp cassette to check Remaining membrane capacity The operating capacity meter must be reset after replacement of the membrane Expiratory valve coil The movable axis of the Expiratory Valve Coil controls the opening of the Expiratory Valve by pushing the valve membrane into desired position The power supply to the coil is regulated so that the remaining pressure in the patient system towards the end of the expiration time is kept on the PEEP level according to front panel setting Expiratory outlet with expiratory one way valve The gas from the patient system leaves the ventilator via this Expiratory Outlet Backflow via the cassette is prevented by the Expiratory One Way Valve Its rubber membrane and valve seat are integrated parts of the Expiratory Outlet PC 1786 Expiratory channel cassette The PC 1786 Expiratory Channel Cassette is a connection board integrated into the Expiratory Cassette for the Ultrasonic Flowmeter and for the Heating Foil lt connects to PC 1785 mounted in the expiratory cassette compartment Includes an ID PROM The ID information can be read by the Servo i System Revision 02 Service Manual Description of functions PC 1785 Expiratory channel connector The PC 1785 Expiratory Channel Connector is a connector board including signal filters that is mounted in the expiratory cassette compa
62. nit and the User Interface The cable can be partly winded up under a rubber cover on the rear of the User Interface Revision 02 Servo i Ventilator System Disassembling and assembling 4 Disassembling and Only personnel trained and authorized by Maquet shall be permitted to perform W9 assembling installation service or maintenance of the Servo Ecne narices rieles Make sure to prepare the Servo i properly before Preparations oocccooccccocncnnonccnnnononnnonanccnnncnananonono disassembling and assembling Refer to section Handling PC boardS AAA Hazard notices in chapter Important Aa senice or malnicnaacemustbencicd ne Replacing PC boards meioiianicido nda log book Assembling guidelines ooocccoccnnccocnnnononcononaso Discard disposable replaced and left over parts Tightening torque ooccccccnnonccnocnnonnnnarnonnonnanannos in accordance with appropriate industrial and environmental standards Threadlocking adhesives occoonccccnnccconocncnnonono After any installation maintenance or service User Interface cocccconnnnconocooncnnconcconnnnnnencccanannnos A EIU tte tae ies om E PC 1777 Panel cccccccccccsscseseseseseseseseseseseenees User s Manual for details Backlight inverter ccccsseccsssseeseseeessneerens MAILS cessa eei Ei Backlight lamps ccccssececeeeeceeeeeeeeesaeeesaees Touch screen assembly ccoocccoccnccncnconcnnnnns Patent CIE aeiiaaie do tic PL
63. nnect the cable connector 4 e Carefully disconnect the backlight lamp cable connectors 5 e Remove the screws 6 holding PC board Backlight Inverter e Lift off PC board Backlight Inverter oO N oO x lt gt N TFT Display Note Disassembling of the TFT Display must be performed in a clean and dustfree environment as the TFT Display is sensitive to contaminants The TFT Display is mounted under the support plate 7 To remove the TFT Display e Disconnect the three touch screen flat cables 8 e Disconnect the four Direct access control cables 9 e Disconnect the Main rotary dial cable 10 e Remove the screws 11 holding the support plate e Lift off the support plate assembly including TFT Display and PC boards SVX9024 4 40 2 Service Manual Revision 02 Servo i Ventilator System SVX9025 ai ain bee SVX9026 1 SVX9027 Revision 02 Disassembling and assembling e Remove the screws 12 holding the TFT Display to the support plate e Carefully disconnect the cable 13 from PC 1777 as shown in the illustration and or from the TFT Display connector Backlight lamps To access the Backlight lamps e Lift off the TFT Display Refer to section TFT Display e Remove the screws 14 holding the lamp On older units the lamps are mounted with a snap in holder e Lift off the lamp 15 Note The Backlight lamp kit includes two lamps Always replace
64. ntrol Replace PC 1772 Monitoring If Expiration valve test failed 1 Check the expiratory cassette e f possible replace the expiratory cassette and check if the new cassette is accepted by the Pre use check If the new cassette was accepted by the Pre use check the fault was located to the cassette To repair the old cassette check that the expiratory valve membrane is clean and correctly seated in the cassette Replace the membrane if required 2 Replace the Expiratory valve coil Troubleshooting Servo i Ventilator System Test description Recommended action if the test fails Safety valve test O cell test Checks and if necessary adjusts the opening pressure for the safety valve to 117 3 cm H O Checks the hardware signals related to the safety valve functions BRE MON Calibrates and checks the O cell at 21 O and 100 O Checks if the O cell is worn out 2 As different gas mixtures are used during this test calibration and check of O cell will not be performed if one gas is missing BRE MON Service Manual 1 Check the inspiratory section e Check that the inspiratory pipe is correctly mounted in inspiratory section Check that the safety valve membrane is clean and correctly seated in the inspiratory pipe Replace the safety valve pull magnet Replace PC 1784 Expiratory channel Replace PC 1772 Monitoring Check that the connected
65. ntrols 3 2 Safety valve pull magnet 4 13 User Interface panel cover 2 3 Serial number label 1 4 2 4 2 6 User s manual 1 4 Serial port 2 6 Service card 5 6 Service connector 2 4 Service contract 1 4 Servo Ultra Nebulizer 2 3 2 6 Servo i Holder 2 3 Servo i Shelf base 2 3 Servo i SW 2 9 Software installation 5 6 Spare parts information 1 4 Special function keys 2 4 Special functions keys label 4 7 Special waste 1 4 Standard and optional connectors 9 2 Standby indicator 2 4 Start Stop Standby ventilation key 2 4 Support Arm 177 2 3 Support plate 4 3 System ID 3 7 System ID SW 2 9 System SW Update 5 6 System version 1 4 y Technical error codes Troubleshooting 6 11 Technical training 1 4 Temperature sensor 2 8 3 5 TFT Display 2 5 4 3 4 4 TFT Display with Backlight 3 2 Threadlocking adhesives 4 2 Tightening torque 4 2 Touch screen assembly 2 5 3 2 4 3 4 6 Tuch screen 2 4 8 4 Service Manual Revision 02 Servo i Ventilator System Diagrams Only personnel trained and authorized 9 Diagrams by Maquet shall be permitted to perform MY Standard and optional connectors 9 2 installation service or maintenance of the Servo i Functional Main Blocks diagram o 9 3 Make sure to prepare the Servo i properly before disassembling and assembling Refer to section Hazard notices in chapter Important Any service or maintenance must be noted in a
66. o the Servo i Make sure to prepare the Servo i properly before User Interface nena disassembling and assembling Refer to section User Interface Controls o cccconnnnccconononnonos Hazard notices in chapter Important PO AECL Panel eerror Erei A SEEE Or UNENANCE MIUS EDE mole iid Loudspeaker vusunciaanors deals rar log book Discard disposable replaced and left over parts BackKiQnt INV senpena RETKE in accordance with appropriate industrial and Touch screen assembly occooccccccnccnccccnccnnnns na MOMA Slanegies TFT Display with Backlight cccccccssssseseeseeee After any installation maintenance or service Patient UD rra iaa intervention in the Servo i perform a Pre use check Refer to the Servo i Ventilator System Inspiratory SECTION occcoccccccocnncoconoconanononanonos User s Manual for details Expiratory Section mesias PC 1770 Main back plane scceceeeeees Pressure transducers ccccscecceeeeseeeeeeseeseees PC 1784 Expiratory Chamel occcccccccncnoo PC 1771 CONTO ouscccsicarenentaie netas naie cito PG 1772 Monitoring secucocsoiacccocacanacasidonerincanents So A tener panscinetestianscu Module UNT cicesercetcetvnsscacsuetcovewaceusevestdeexcsiacenes Internal fan ca cetbenet cic o iopsocioniciceccilacubes s Optional PG board slots isoasininsinciinac is Alarm output connector optional 3 10 Battery modules optional
67. o the rear side of the User Interface close to the On Off switch The serial number stated on this label is the ID number of the User Interface System version number can be found in the Status window on the User Interface Make sure that the version of the User s manual corresponds to the System version Text inside a box is used to highlight important information In addition to the Important information given here and in the related documents e g in the User s manual always pay attention to applicable local and national regulations Responsibility for the safe functioning of the equipment reverts to the owner or user in all cases in which service or repair has been done by a non professional or by persons who are not employed by or authorized by Maquet and when the equipment is used for other than its intended purpose Important Symbols used in this manual ESD sensitive components When handling ESD sensitive devices established procedures must be observed to prevent damage Special waste Discard disposable replaced and left over parts in accordance with appropriate industrial and environmental standards A A a a Recycling Recycle if possible Recycling facilities may not be available in all areas Technical training Refers to the Technical training supplied by Maquet Service contract Refers to the Service contract supplied by Maquet Hazard notices Service Manual Befo
68. of functions PC 1784 Expiratory channel Functional Main Blocks diagram marking F The main block Expiratory channel comprises microprocessor control to achieve measurement of expiratory flow The output signal Exp Flow is used in the main block Control Electronics including microprocessor uP for handling of e All electronic connections to and from the Expiratory Section functions e Measurement of airway pressures in both Inspiratory Section and Expiratory Section e Control of the Safety Valve functions in the Inspiratory Section A thermistor on PC 1784 monitors the temperature inside the Patient Unit An alarm is activated if the temperature is 77 5 C 170 9 F or higher Includes an ID PROM The ID information can be read by the Servo i System Note The System SW must be re installed if PC 1784 is replaced PC 1771 Control Functional Main Blocks diagram marking C The main block Control comprises microprocessor control of Breathing pattern for all different ventilation modes Electronics including microprocessor uP control to achieve 1 Regulation of Inspiratory flow which is used during inspiration time in Volume Control VC mode 2 Regulation of Inspiratory pressure which can be used during inspiration time in any mode 3 Regulation of a constant Inspiratory flow which is used during expiration time in all modes 4 Respiratory timing pattern including frequency as well as distrib
69. olatile memory Power down can be caused by Turning the On Off switch Off Mains failure and no back up battery connected The system is powered from a battery but the battery voltage is too low for proper operation of the system In this Off mode only charging of Battery modules is enabled if the system is connected to mains All other circuitry is un powered In Standby all circuitry is powered from the Power supply but no breathing will be active The operator can set all parameters including breathing mode during Standby Revision 02 Service Manual Description of functions Mains inlet Inlet for mains power supply including grounding connection The Servo i System will automatically adjust to the connected mains power if the mains power is within specified range No voltage or frequence setting is required The mains inlet is equipped with two mains power fuses F11 and F12 rated 2 5 A AC DC Converter Converts the connected AC Power inlet voltage 85 250 V AC to the internal DC supply voltage 12 V_Unreg PC 1778 DC DC amp Standard connectors Converts the internal DC supply voltage 12 V_Unreg into the following internal DC supply voltages e 24V e 12V e 12V e 5 V e 3 3 V All standard connectors are located on this board The connectors are the following e N26 External 12 V DC supply input The connectors is equipped with a fuse F1 rated 10 A e N27 Option
70. on on a number of units Set date and clock Available only in Standby mode Date and time setting can be changed in this window Service procedures O cell adaptation Available only during ventilation Adjustment of the O concentration reading Refer to the Servo i Ventilator System User s Manual chapter Operating your Servo i Operating Adjustments for further information Revision 02 Service Manual 5 5 Service procedures Software installation General e Before starting any software upgrade or update check the version of the Installed System SW see System SW version in the General Status window System SW stored on the PC Card It is not recommended to install System SW with lower version number than already installed in the Servo Ventilator System e After any installation maintenance or service intervention in the Servo i perform a Pre use check according to instructions in the Servo i Ventilator System User s manual Software information There are two different intentions for software installation System SW Update A System SW Update will install a new System SW version in the Servo i Ventilator System System SW Updates are not dependent on the serial number of the ventilator and will not alter the installed options Option Upgrade An Option Upgrade will change the function of the Servo i Ventilator System An Option Upgrade is individually
71. onnector 8 SVX9088 Release the locks on the PC board guides Carefully pull out the PC board Note When replacing PC 1771 Control PC 1772 Monitoring or PC 1784 Expiratory Channel it can be necessary to re install the System SW For further information refer to section Replacing PC boards in this chapter AC DC Converter e Remove the Patient Unit front cover e Disconnect cable connectors 1 and 2 e Remove the screws and nuts 3 e Remove the screw 4 e Carefully lift out the AC DC Converter 5 oO N O O x lt gt 09 SVX9075 Revision 02 Service Manual 4 9 Disassembling and assembling Servo i Ventilator System Module unit including PC 1775 Plug and play back plane e Remove the Patient Unit front cover e Remove the AC DC Converter e Disconnect the nebulizer cable connector 1 e Remove the screw 2 e Remove the screws 3 e Disconnect the Module unit PC 1775 from PC 1770 Main back plane at the connector 4 e Carefully lift out the Module unit 5 Note When assembling the unit make sure that the spacer 6 is in position with its flat side facing down The spacer designed as a wedge should be pushed inwards before the screws 3 are tightened pa 175 svx9077 SVX9078 PC 1775 Plug and play back plane is mounted on the Module unit with the screws 7 SVX9079 4 10 Service Manual Revision 02 Servo i Ventilator System s
72. or tank e Disconnect Battery modules e Make sure that all gas conveying parts are cleaned according to instructions in the Servo i Ventilator System User s manual After any service intervention in the Servo i perform a Pre use check according to instructions in the Servo i Ventilator System User s manual Handling PC boards The PC boards contain components that are highly sensitive to static electricity Those who come into contact with circuit boards containing sensitive components must take certain precautions to avoid damaging the components ESD protection When working with ESD sensitive components always use a grounded wrist band and grounded work surface Adequate service tools must also be used PC boards spare parts must always be kept in protective packaging for sensitive electronic device PC boards must not be inserted or removed while the mains power or battery power is applied to the PC boards Remove and insert the PC boards very carefully to avoid damage to the connectors Servo i Ventilator System Replacing PC boards The Servo i software is distributed on different subsystems located on the following PC boards e PC 1771 Control e PC 1772 Monitoring e PC 1784 Expiratory Channel e PC 1777 Panel When delivered as spare parts these PC boards are equipped with a System SW version that may differ from the version on the unit to be repaired To keep the S
73. ot intended for connection insert of a PC Card PC Cards are used to Download software into the different flash memories situated on PC boards marked uP and into the EEPROM on PC 1770 Main Back plane Transfer patient and system data for further transfer to a computer Service purpose e Microprocessor on this board includes control of the functions of the User Interface 3 2 Service Manual Servo i Ventilator System e ID PROM The ID information can be read by the Servo i e On Off switch Switch to Power up or Power down the Servo i Refer to section Power supply e Connection for PC P86 Ethernet port intended for test and service purpose Connected via a service cable For future options e Microphone used to monitor of sounds from the Loudspeaker Note The System SW must be re installed if PC 1777 is replaced Loudspeaker For generation of sound e g alarm Connected to P72 on PC 1777 Panel The loudspeaker generates different tones with individual sound volumes At start up and during Pre use check the function of the loudspeaker is monitored by the microphone on PC 1777 During operation it is continuously monitored through Current sensing Backlight Inverter PC board with driving stage for backlight lamps mounted behind the TFT Display The supply voltage delivered by the Backlight Inverter is 660 V The Backlight Inverter is connected to P73 on PC 1777 Panel Touch screen
74. pments documentation Example on such optional equipment are Humidifier Compressor Mini Preparations e Make sure that the Servo i works properly before performing any maintenance e Set the On Off switch on the User Interface to Off e Disconnect the mains power cable e Disconnect the gas supplies wall and or cylinder e Remove patient tubing e f fitted remove bacteria filter from the expiratory inlet Equipment e Standard service tools e Barometer or information about the actual barometric pressure e Access to the Field Service System FSS Recommended but not required e Preventive maintenance kit containing all parts needed during the maintenance 7 2 Service Manual Revision 02 Servo i Ventilator System o O o 2 gt 0 Revision 02 Preventive maintenance Preventive maintenance Maintenance kit 5 000 hours Only original parts from the manufacturer must be used Spare parts and maintenance kits can be ordered from your local Maquet representative When performing this maintenance a Maintenance kit 5 000 hours should be used The following parts shall be replaced and they are included in the Maintenance kit 5 000 hours A Filters for the gas modules B Nozzle units for the gas modules C Bacteria filter for the inspiratory pressure transducer D Bacteria filter for the O cell Performing the Preventive maintenance e Disassembling
75. r test Revision 02 Calibrates and checks the inspiratory and expiratory pressure transducers The new zero value for the pressure transducers may not differ more than 6 cm H O from factory calibration With the inspiratory pressure transducers used as a reference a new gain factor is set for the expiratory pressure transducer The new gain factor may not differ more than 5 from factory calibration During this test the different subsystems concerned are compared The difference between the sub systems must not be more than 1 cm H O at 60 cm H O Expiratory valve coil test Measures offset and gain in the valve coil BRE MON Service Manual Check that System SW V1 03 01 or later is installed Update System SW if required Check the Test results log in the More detailed mode FSS If Pressure transducer test failed 1 Check the expiratory cassette e f possible replace the expiratory cassette and check if the new cassette is accepted by the Pre use check If the new cassette was accepted by the Pre use check the fault was located to the cassette The fail with the old cassette may in this case be due to water collected at the pressure transducer filter inside the cassette Dry the old cassette properly Check replace PC 1781 Pressure transducer Insp and Exp To locate the faulty pressure transducer replace one transducer at a time Replace PC 1771 Co
76. re disassembling or assembling of the Servo i make sure that the On Off switch is set to Off Mains power cable is disconnected Gas supply is disconnected wall and or cylinder Battery modules are disconnected The Servo i is cleaned according to instructions in the User s manual chapter Routine cleaning and chapter Regular maintenance section Extended cleaning of inspiratory channel With power supply connected to the Servo i there are energized electrical components inside the unit All personnel must exercise extreme caution if fault tracing or adjustments are performed with power supply connected and with user interface and patient unit covers removed Revision 02 Important Important Installation e Only personnel trained and authorized by Maquet shall be permitted to install the Servo i The installation and handing over procedures are described in the Servo i Ventilator System Installation Instructions Functional check To the responsible service personnel e The contents of this document are not binding e After any installation maintenance or service intervention in the Servo i perform a Pre use check according to instructions in the Servo i Ventilator System User s manual Service e The Servo i must be serviced at regular intervals by personnel trained and authorized by Maquet Any maintenance or service must be noted in a lo
77. rly when the Pre use check is started distinct clicking sound from the valve If the safety valve opens during this test the opening pressure may not be correctly calibrated see Safety valve test below Run the Safety valve test and repeat the complete Pre use check Service Manual 6 5 Troubleshooting Servo i Ventilator System Test Test description Recommended action if the test fails Internal leakage test If message Pressure Transducer continued difference gt 5 cm H O appears 1 Check that the pressure transducer tubes and the inspiratory filter are correctly mounted Check that both PC 1781 Pressure transducer Insp and Exp are correctly mounted If the Pressure transducer test also fails see below refer to the recommended actions if Pressure transducer test failed If message System volume too small appears 1 Replace the gas modules Replace one gas module at a time If message System volume too large appears 1 Check that the correct test tube is used during the Pre use check If the Flow transducer test also fails See below replace the gas modules Replace one gas module at a time Refer to troubleshooting as described for Leakage or Excessive leakage above 6 6 Service Manual Revision 02 Servo i Ventilator System Troubleshooting Test description Recommended action if the test fails Pressure transduce
78. ror Error message Possible cause Recommended action code Breathing 10001 BATTERY_MIN_VOLTAGE 1 Replace battery on PC 1771 Control 10002 BRE_I2C_ERROR 1 Replace PC 1771 Control 10003 BRE_FATAL_MEMORY_ERROR 1 Restart the unit 2 Replace PC 1771 Control 20001 PANEL_DEVICE_ERROR 1 Replace PC 1777 Panel 20002 PANEL_BACKLIGHT_BROKEN If the display is lit and the error code is shown on the display 1 Replace PC 1777 Panel This error message may also be logged immediately before the No battery capacity alarm when the unit is running in battery If the display is not lit the display is dark mode 1 Replace backlight lamps 2 Replace PC board Backlight Inverter Note If one of the lamps is broken the other lamp will automatically be switched off Thus with a failure on a backlight lamp or likely also on PC board Backlight Inverter the User Interface display will become dark This error code will in such case not be possible to see but will be logged 20003 PANEL_BUTTON_STUCK Restart the unit Do not touch the User Interface during system start up Interfering the knobs keys touch screen loudspeaker grid etc may affect the internal technical tests Check that System SW V1 03 00 or later is installed Update System SW if required Check the user interface membrane buttons FSS Replace the touch screen Replace PC 1777 Panel Revision 02 Service Manual
79. rtment It connects to PC 1786 mounted in the Expiratory Cassette when the cassette is docked to the expiratory cassette compartment PC 1770 Main back plane Interconnection board for the PC boards in the lower part of the patient unit The ventilators System ID Serial No configuration time stamp for preventive maintenance etc is stored in an EEPROM on PC 1770 Thus when replacing PC 1770 a spare part that is factory programmed for the concerned ventilator must be used As the preventive maintenance time stamp will be reset when replacing PC 1770 a new time stamp must be set via the Biomed menu In order to make this new time stamp correct the preventive maintenance must be performed Refer to chapter Preventive maintenance Pressure transducers Functional Main Blocks diagram marking T PC 1781 Inspiratory pressure transducer The pressure conveyed via the pressure tube connected to this block is led to and measured by its differential pressure transducer With differential reference to the ambient pressure the output signal is proportional to the measured pressure thus giving a linear measurement in the range 40 cm H O to 160 cm H O Technical limitation Pressure exceeding 400 cm H O must be avoided Includes an ID PROM The ID information can be read by the Servo i System PC 1781 Expiratory pressure transducer Function identical to PC 1781 Inspiratory Pressure Transducer Description
80. s Service Manual 4 13 Disassembling and assembling Servo i Ventilator System Gas modules To remove the gas modules e Remove the inspiratory section cover e Loosen the screw 1 e Lift off the gas module bracket 2 SVX9051 e Pull out and lift off both gas modules Note 1 When assembling make sure that the connector muff properly seals around the inspiratory pipe 1 The connector muff must not be pushed too far onto the nozzle units 2 Note 2 The gas modules used in Servo i are factory adjusted for this purpose When replacing gas modules make sure to use only Servo i gas modules Similar gas modules intended for the SV 300 300A or KION KION i Systems must not be used 59 OS o O x lt gt 09 Service Manual Revision 02 K I mb K Servo i Ventilator System Disassembling and assembling PC 1785 Expiratory channel connector To remove PC 1785 e Remove the Patient Unit front cover e Disconnect the PC 1785 cable connector 1 e Remove the screws 2 e Pull down and lift off PC 1785 3 Note When assembling make sure that the rubber seal 4 is correctly seated around PC 1785 SVX9054 Expiratory valve coil To remove the expiratory valve coil e Remove the Patient Unit front cover e Disconnect the connectors 2 and 3 from PC 1784 e Disconnect the tubes 4 and 5 from PC 1784 e Disconnect the inspiratory pressure tube from the inspiratory pipe inside the in
81. sducer A bacteria filter protects the pressure transducer on PC 1781 Pressure Transducer from contamination Maintenance including exchange of bacteria filter according to User s manual The bacteria filter must also be replaced during the Preventive maintenance Safety valve The movable axis of the Safety Valve Pull Magnet controls the opening and closing of the safety valve membrane in the Inspiratory Pipe The pull magnet is electrically activated closed from the main block Expiratory Channel SVX9016 When the Safety Valve is not activated the weight of the pull magnet axis in combination with the design of the valve membrane pushes the pull magnet axis downwards This actuates the Safety Valve to be opened and the inspiratory gas is let out from the Inspiratory Pipe via the Safety Outlet thus enabling a decrease in the inspiratory pressure The Safety Outlet is covered by a plastic grid This is normal safety pop off function The opening conditions for the safety valve are e The ventilator is switched Off or Standby e The pressure inside the inspiratory pipe is 5 cm H O above the preset Upper Pressure Alarm limit This condition is controlled by the Monitoring subsystem e The pressure inside the inspiratory pipe is 7 cm H O above the preset Upper Pressure Alarm limit This condition is controlled by the Breathing subsystem Revision 02 Service Manual Description of functions e The press
82. sibilities of operational errors If the malfunction remains use the troubleshooting guides below as well as the information in chapter Description of functions to locate the faulty part Perform actions step by step and check that the malfunction is eliminated When the fault is corrected carry out a complete Pre use check as described in the Servo i Ventilator System User s manual The troubleshooting guides below are focused only on technical problems Information about clinical related problems can be found in the Servo i Ventilator System User s manual For functionality enhancement the latest released version of the System SW is always recommended 6 2 Service Manual Revision 02 Servo i Ventilator System Pre use check The Servo i demands the user to start the automatic Pre use check at every start up of the unit It is also possible to select the Pre use check via the Standby menu The Servo i Ventilator System User s Manual describes how to perform this Pre use check The Pre use check description on the following pages gives more detailed information about the Pre use check This information can be used e g during troubleshooting of the unit Troubleshooting Some of the recommended actions described below refer to the Field Service System FSS The Service card is required to access the FSS Troubleshooting can of course be performed without access to the FSS but for some of
83. spiratory section not visible in this illustration e Remove the two screws 6 e Lift off the cassette compartment 1 SVX9055 a e Remove the screws 7 e Lift off the expiratory valve coil 8 oO LO o O x lt gt N Revision 02 Service Manual 4 15 Disassembling and assembling Servo i Ventilator System Expiratory cassette membrane The expiratory cassette is a complete unit and must not be disassembled The only part that can be replaced is the valve membrane Operating capacity for the membrane is estimated to 10 000 000 breathing cycles When this limit is passed or if the membrane for some reason has become defective it must be replaced Remaining operating capacity in for the membrane can be shown in the Status window Select Status Exp cassette to check Remaining membrane capacity The operating capacity meter must be reset after replacement of the membrane It is very important for the function of the expiratory valve that the valve membrane is removed and mounted correctly as described below To remove the valve membrane from the cassette e Carefully remove the membrane including retaining ring using a suitable retaining ring pliers SVX9057 To mount the valve membrane into the cassette e Place the retaining ring 1 correctly into the membrane It is very important that the valve membrane and the membrane seat in the cassette is clean Dirt particles c
84. ssette 2 8 3 6 7 5 Expiratory cassette membrane 3 7 4 16 Expiratory inlet 2 6 Expiratory one way valve 2 8 Expiratory outlet 2 6 Expiratory section 3 6 Expiratory valve 2 8 Expiratory valve coil 2 7 2 8 4 15 External 12V DC power supply connector 2 6 9 2 E Field Service System 5 6 Fixed key 2 4 Fixed keys label 4 6 Flash memory 3 2 Front cover 4 8 Functional check 1 5 Functional Main Blocks diagram 9 3 Fuse F1 2 6 Fuse F11 2 6 Fuse F12 2 6 G Gas cylinder restrainer 2 3 Gas inlet 2 6 Gas module 2 8 3 3 4 14 7 3 Gas supply pressure transducer 7 6 Gas trolley 2 3 Hazard notices 1 4 Heating foil 2 8 Humidifier 2 3 Humidifier holder 2 3 Inspiratory channel 4 13 Inspiratory outlet 2 6 3 5 Inspiratory pipe 2 8 3 4 4 14 Inspiratory pressure transducer filter 7 4 Inspiratory pressure transducer tube 2 8 3 5 Inspiratory section 3 3 Inspiratory section cover 2 6 Installation 1 5 8 2 Service Manual Revision 02 Servo i Ventilator System Installation Instructions 1 4 Internal fan 2 6 2 7 3 10 4 11 7 5 Internal fan filter 7 5 IV Pole 2 3 L Label strips 4 6 Lithium battery 1 5 5 3 7 2 7 6 Locking arm rotation 2 4 Locking arm tilting 2 4 Locking screw 2 4 Loudspeaker 2 5 3 2 Loudspeaker grid 2 4 Luminescence detector 2 4 M Main Blocks diagram 9 3 Main rotary dial 2 4 2 5 Main units 2 2 Mains indicator 2 4 Mains inlet 3 9 Mains supply inlet 2
85. t for the regulation of expiratory pressure Expiratory cassette The expiratory gas conveying parts and PC 1786 Expiratory Channel Cassette are integrated into one part the Expiratory Cassette which can be easily removed for cleaning or exchange See Servo i Ventilator System User s manual SVX9018 The expiratory cassette can be interchanged between different Servo i systems A Pre use check is always required after exchanging the expiratory cassette The left hand side transducer is sending out ultrasonic sound that is reflected against the inner wall of the expiratory channel The ultrasonic sound PC 1786 i i transducer channel cassette transducer acting as a reciever The time from sending to recieving ultrasonic sound in downstream expiratory gas flow is measured Then the right hand side transducer earlier recieving is sending out ultrasonic sound upstream the expiratory gas flow The ultrasonic sound is recieved by the left hand side transducer now acting as a reciever The time from sending to recieving ultrasonic sound in upstream expiratory gas flow is Inlet 2 ntl measured 09 The time difference between the downstream and Heating Bacteria Expiratory pressure the upstream time measurements provides flow foil filter tube connector information A temperature sensor inside the cassette measures the expiratory gas temperature This temperature Expiratory inlet measur
86. tatus window Select Status Exp cassette to check Remaining membrane capacity e When this capacity limit is passed or if the membrane for some reason has become defective it must be replaced Refer to instructions in chapter Disassembling and assembling e The operating capacity meter must be reset after replacement of the membrane To access the reset button select Menu Biomed Service Service Manual 7 5 Preventive maintenance User Interface e Check the touch screen readability Transparency Surface Brightness backlight Estimated lifetime with acceptable brightness level for the lamps is 30 000 hours Using the Field Service System FSS a time meter for the lamps can be shown The time meter must be reset after replacement of the lamps Check if pixels on the touch screen are defective Open the Status window A few defective pixels can be accepted Check that defective pixels are not concentrated to a small area thus reducing the readability in this area FSS is recommended but not required Perform the checks listed below and make sure that the software responds to these actions FSS is recommended but not required Check the touch screen functions Press buttons on different parts of the touch screen Check the Main Rotary Dial Turn and press the Main Rotary Dial Check the Direct Access Knobs Turn and press all Direct Access Knobs Check the membr
87. ultiple PC boards l e O module containing multiple PC boards I e AC DC Converter containing PC boards P e Expiratory cassette E e Expiratory valve coil E e Safety valve pull magnet I Service Manual Important Construction materials The construction materials used in Servo i in of the total weight Metal total 77 e Aluminium 70 e Steel zink brass 8 Polymeric material total 9 e PA Polyamide e POM Polyoxymethylene e SI Silicone e TPE Thermoplastic elastomer e PUR Polyurethane e ABS Acrylicnitrilebutadienstyrene e EPDM Ethylenepropylenedienemonomer e PTFE Polytetrafluoroethylene e FPM Fluororubber e NBR Nitrilerubber e PP Polypropylene e PVC Polyvinyl chloride e PS Polystyrene Electronics total 14 e Accumulators Nickel Metalhydride e Printed circuit boards cables etc Others very small amounts e Sterile filter paper of glass fibre Revision 02 Important Important Articles of consumption Bacteria filter Filters for the gas modules Filter for the inspiration pressure transducer Filter for the O cell Nozzle units for the gas modules Battery modules Lithium batteries ea SS YS Expiratory cassette 9 Expiratory cassette membrane 10 O cell 11 Backlight lamps Item 1 Consumption approximately 250 pcs year Items 2 5 Changed approx every 5 000 hours Items 6 7 Changed approx every 15 000 hours Items 8
88. um batteries mounted onto PC 1771 and PC 1772 The batteries must be replaced after 5 years Replacement is described in chapter Service procedures Safety inspection e Make a visual inspection of the Servo i for external defects or damages Replace defective or damaged parts e Check the mains power cable and control cable and their connections for damage Perform a leakage current test The leakage current test is a standard procedure regulated by IEC 60 601 1 or corresponding national standards Allowable values and test methods are defined in the standard The use of a leakage tester e g Bender Safety Tester 601 751 or equivalent is recommended Check that a Servo i Ventilator System User s manual and a Servo i Ventilator System Brief instructions corresponding to the installed System SW version is present Also check that operating manuals for all optional equipment connected to the Servo i are present Completing the Preventive maintenance e Perform a Pre use check Refer to the Servo i Ventilator System User s manual e Perform Function checks on the optional equipments connected to the Servo i Refer to the operating manuals for these optional equipments e Note in the Servo i System SW select Menu Biomed Service Report PM and also in a Servo i log book that a Preventive maintenance has been performed Revision 02 Servo i Ventilator System Index Only personne
89. ure inside the inspiratory pipe is above 117 7 cm H O This is an extra safety function and this situation will normally not occur e The safety valve will also be opened by some other alarms e g the Out of gas alarm During startup the pull magnet is electrically activated so that the pull magnet axis is pushed up with a clicking sound This is the normal operational position of the pull magnet the Safety Valve is normally kept closed The safety valve opening pressure is calibrated to 117 3 cm H O during each Pre use check Inspiratory outlet 22 mm 15 mm tube connector for the inspiratory tube of the patient breathing system PC 1780 Pneumatic back plane Interconnecting board including connectors for cables to the Gas Modules as well as to the Safety Valve and to the O Cell and the Temperature Sensor Description of functions Servo i Ventilator System Expiratory section Ultrasonic flowmeter The Ultrasonic Flowmeter is a measuring device for Functional Main Blocks diagram marking E the expiratory gas flow using ultrasound technique The main block Expiratory Section conveys the with two ultrasonic transducers recievers breathing gas from the patient breathing system to The measuring process is controlled from the main the Expiratory Outlet It comprises block PC 1784 Expiratory Channel e Measurement of expiratory flow e Connection for measurement of expiratory pressure e Controlling elemen
90. ution of the duration for Inspiration time Pause time and Expiration time according to front panel settings 5 Regulation of Inspiratory flow during inspiration time The desired total Inspiratory flow value according to front panel settings is used to generate the flow reference signals Insp Flow Ref 1 and Insp Flow Ref 2 The level relation between these two flow reference signals depends on the desired O concentration according to front panel setting Insp Flow Ref 1 and Insp Flow Ref 2 are used for the control of its respective Gas Module Air and O 3 8 Service Manual Servo i Ventilator System Regulation of a constant Inspiratory flow during expiration time The desired constant Inspiratory flow value is the default or preset Bias flow value see User s manual This desired constant Inspiratory flow value is used to generate the flow reference signals Insp Flow Ref 1 and Insp Flow Ref 2 with the same relation and same handling as described above under Regulation of Inspiratory flow except this occurs during expiration time The electronics controlling the optional Servo Ultra Nebulizer is located on PC 1771 Control Includes an ID PROM The ID information can be read by the Servo i System Note The System SW must be re installed if PC 1771 is replaced A lithium battery on PC 1771 power supplies the internal memory on the PC board If the battery on PC 1771 is disconnected or if the battery voltage is
91. vxo081 MN SVX9082 Revision 02 Disassembling and assembling PC 1778 DC DC amp Standard connectors e Remove the Patient Unit front cover e Remove the screws 1 e Carefully pull out PC 1778 2 Internal fan e Remove the AC DC Converter e Remove PC 1789 Remote alarm connector if mounted e Disconnect the fan cable connector 1 e Remove the screws 2 e Carefully lift out the Internal fan 3 Note When assembling make sure that the rubber seal 4 is mounted as shown in the illustration SVX9083 Service Manual 4 11 Disassembling and assembling Servo i Ventilator System PC 1789 Remote alarm connector PC 1789 Remote alarm connector is part of the optional Alarm output connector e Disconnect the cable 1 e Remove the screws 2 e Carefully lift out PC 1789 3 PC 1770 Main back plane e Remove PC 1780 Pneumatic back plane inside the Inspiratory section e Remove PC 1772 Monitoring PC 1771 Control PC 1784 Expiratory channel e Remove the AC DC Converter e Remove the Module unit e Remove PC 1778 DC DC amp Standard connectors e Remove PC 1789 Remote alarm connector if mounted e Remove the Internal fan e Remove the screws 1 e Carefully lift out PC 1770 2 o ears o o x lt gt 09 Note The ventilators System ID configuration time stamp for preventive maintenance etc is stored in an EEPROM on PC 1770 Main back plane 2 Thus
92. ystem SW version used prior to the PC board replacement a SW version update card with the applicable System SW version must be available for re installation purposes For functionality enhancement the latest released version of the System SW is always recommended Before installing a new System SW version on a unit ensure that the software is fully compatible with all HW SW and mechanical components in the unit If any compatibility conflicts are apparent this will be noted on the MAQUET Critical Care SW download web site Assembling guidelines The Servo i system specifications allow unit operation also during patient transportation All parts of the User Interface and the Patient Unit assembled with screws and nuts are therefore tightened with a specified torque and secured with threadlocking adhesives In order to maintain these specifications over time it must be ensured that after any service intervention removed parts are re assembled and secured according to instructions Make sure to follow the guidelines stated below Tightening torque e Thread size M3 0 95 0 05 Nm e Thread size M4 M6 3 1 0 1 Nm Threadlocking adhesives e Electrolube Bloc Lube BLV15ML on threads in contact with PC boards e Loctite 2430 on all other threads Note Threadlocking adhesive is not required on Heli Coil screw thread inserts as these screw thread inserts have a self locking function Revision 02 Service

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