Aestiva 7900 Technical Reference Manual Rev ZAA Dec 2015

Aestiva 7900 Datex-Ohmeda, Inc., a General Electric Company, doing business as GE Healthcare. Datex-Ohmeda products have unit serial numbers with coded logic which indicates a product group code, the year of manufacture, and a sequential unit number for identification. The serial number can be in one of two formats. A AA X 11111

AAA XX 111111AA

The X represents an alpha character The XX represents a number indicating indicating the year the product was the year the product was manufactured; manufactured; H = 2004, J = 2005, etc. 04 = 2004, 05 = 2005, etc. I and O are not used.

Technical Competence The procedures described in this Technical Reference manual should be performed by trained and authorized personnel only. Maintenance should only be undertaken by competent individuals who have a general knowledge of and experience with devices of this nature. No repairs should ever be undertaken or attempted by anyone not having such qualifications. Replace damaged parts with components manufactured or sold by GE Healthcare. Then test the unit to ascertain that it complies with the manufacturer’s published specifications. Read completely through each step in every procedure before starting the procedure; any exceptions may result in a failure to properly and safely complete the attempted procedure.

Aestiva, SmartVent, and Link-25 are trademarks of General Electric Company or one of its subsidiaries. Other brand names or product names used in this manual are trademarks of their respective holders.

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Technical Reference Manual

Aestiva 7900 Anesthesia Machine • Includes Aestiva MRI Supplement- Refer to Section 12

This document is not to be reproduced in any manner, nor are the contents to be disclosed to anyone, without the express authorization of the product service department, Datex-Ohmeda, Ohmeda Drive, PO Box 7550, Madison, Wisconsin, 53707.

© 2015 Datex-Ohmeda Inc.

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Important The information contained in this Technical Reference manual pertains only to those models of products which are marketed by Datex-Ohmeda as of the effective date of this manual or the latest revision thereof. This Technical Reference manual was prepared for exclusive use by Datex-Ohmeda service personnel in light of their training and experience as well as the availability to them of parts, proper tools and test equipment. Consequently, Datex-Ohmeda provides this Technical Reference manual to its customers purely as a business convenience and for the customer's general information only without warranty of the results with respect to any application of such information. Furthermore, because of the wide variety of circumstances under which maintenance and repair activities may be performed and the unique nature of each individual's own experience, capacity, and qualifications, the fact that customer has received such information from Datex-Ohmeda does not imply in anyway that Datex-Ohmeda deems said individual to be qualified to perform any such maintenance or repair service. Moreover, it should not be assumed that every acceptable test and safety procedure or method, precaution, tool, equipment or device is referred to within, or that abnormal or unusual circumstances, may not warrant or suggest different or additional procedures or requirements. This manual is subject to periodic review, update and revision. Customers are cautioned to obtain and consult the latest revision before undertaking any service of the equipment. Comments and suggestions on this manual are invited from our customers. Send your comments and suggestions to the Manager of Technical Communications, Datex-Ohmeda, Ohmeda Drive, PO Box 7550, Madison, Wisconsin 53707.

w CAUTION

Servicing of this product in accordance with this Technical Reference manual should never be undertaken in the absence of proper tools, test equipment and the most recent revision to this service manual which is clearly and thoroughly understood.

w WARNING

Do not modify this equipment without authorization from the manufacturer. Unauthorized modifications could result in damage to the equipment and/or cause patient injury. Changes or modification to this equipment not expressly approved by the manufacturer could cause EMC issues with this or other equipment. Contact the manufacturer for assistance. This device is designed and tested to comply with applicable regulations regarding EMC as follows: • Use of portable phones or other radio frequency (RF) emitting equipment (that exceed electromagnetic interference levels specified in IEC 60601-1-2) near the system may cause unexpected or adverse operation. Monitor operation when RF emitters are in the vicinity. • Use of other electrical equipment adjacent to or stacked with this system may cause interference. Verify normal operation of equipment in the system before use on patients.

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Table of Contents

Technical Competence... Important...ii

1 Introduction 1.1 What this manual includes...1-2 1.2 Standard service procedures...1-3 1.2.1 Operation manuals...1-3 1.2.2 Software versions...1-3 1.2.3 Ventilator tests...1-3 1.3 System overview...1-4 1.4 Configuration options...1-5 1.5 Symbols used in the manual or on the equipment...1-9

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Aestiva 7900 2 Theory of Operation 2.1 Theory overview...2-3 2.2 Gas flow through the anesthesia machine...2-3 2.2.1 Overview...2-3 2.2.2 Physical connections...2-8 2.2.3 System switch... 2-10 2.2.4 Flow control... 2-11 2.3 Flow through the breathing system... 2-13 2.3.1 Overview of flow paths... 2-13 2.3.2 Manual ventilation - Circle Module... 2-14 2.3.3 Mechanical ventilation - Circle Module... 2-17 2.3.4 Fresh gas flow... 2-20 2.3.5 Different breathing circuit modules... 2-22 2.3.6 CO2 Bypass... 2-23 2.3.7 Auxiliary Common Gas Outlet (ACGO)... 2-24 2.4 Electrical and pneumatic signals... 2-25 2.4.1 Summary of signals... 2-25 2.4.2 Subfloor tubing and wiring connections... 2-27 2.4.3 Breathing circuit module ID... 2-28 2.4.4 Control panel switches... 2-29 2.4.5 Canister switch... 2-30 2.5 Ventilator monitoring and control... 2-31 2.5.1 Summary of ventilator function... 2-31 2.5.2 Volume Mode... 2-31 2.5.3 Pressure Mode... 2-31 2.5.4 PEEP... 2-32 2.5.5 O2 Monitoring... 2-32 2.5.6 Volume Monitoring... 2-32 2.5.7 Volume Compensation... 2-33 2.5.8 Pressure Waveform... 2-33 2.6 General description: 7900 Ventilator... 2-34 2.7 Aestiva 7900 Ventilator features... 2-34 2.7.1 Safety features... 2-34 2.8 Aestiva 7900 Ventilator components... 2-35 2.8.1 Ventilator control electronics... 2-36 2.8.2 Control panel and display... 2-38 2.8.3 Enhanced Sensor Interface Board (ESIB)... 2-39 2.8.4 Pneumatic Engine... 2-40

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Table of Contents 2.9 Electrical... 2-41 2.9.1 Electrical (original)... 2-41 2.9.2 Electrical (integrated)... 2-42 2.9.3 Power supply (original)... 2-43 2.9.4 Power supply (integrated CPU)... 2-44 2.9.5 Sealed lead acid battery... 2-45 2.9.6 CPU assembly... 2-46 2.9.7 Sensor Interface Board (SIB)... 2-53 2.9.8 Enhanced Sensor Interface Board (ESIB)... 2-56 2.10 Mechanical subsystems... 2-59 2.10.1 Supply gas... 2-59 2.10.2 Gas Inlet Valve (GIV)... 2-60 2.10.3 Flow control valve... 2-60 2.10.4 Drive Gas Check Valve (DGCV)... 2-61 2.10.5 Bellows Pressure Relief Valve... 2-61 2.10.6 Exhalation valve... 2-62 2.10.7 Mechanical Overpressure Valve... 2-62 2.10.8 Bleed resistor... 2-62 2.10.9 Free breathing valve... 2-63 2.10.10 Breathing circuit flow sensors... 2-63

3 Checkout Procedure 3.1 Ventilator post-service checkout...3-2 3.1 Inspect the system...3-2 3.2 Pipeline and cylinder tests...3-3 3.3 Flow control and pressure relief tests...3-4 3.4 Vaporizer back pressure and interlock test...3-7 3.5 Low-pressure leak test...3-8 3.6 Alarm tests... 3-10 3.7 Breathing system tests... 3-12 3.8 Auxiliary O2 flowmeter tests... 3-15 3.9 Integrated Suction Regulator tests... 3-15 3.10 Power failure test... 3-16 3.11 Electrical safety tests... 3-16

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Aestiva 7900 4a Self Tests and Service Mode - Software Revision 4.X 4a.1 Self tests...4a-3 4a.2 Service Mode Confirmation menu...4a-4 4a.3 Main Menu - Service Mode...4a-5 4a.3.1 Alarm Log...4a-6 4a.3.2 Error Log...4a-7 4a.3.3 System Configuration...4a-8 4a.3.4 User Select Defaults... 4a-12 4a.3.5 Test CPU and Memory... 4a-14 4a.3.6 Test EEPROM... 4a-15 4a.3.7 Test GIV... 4a-16 4a.3.8 Test Flow Valve... 4a-17 4a.3.9 Test Drive Pressure Limit Switch... 4a-18 4a.3.10 Test 5V Fail Alarm... 4a-19 4a.3.11 Test Serial Ports... 4a-20 4a.3.12 Breathing System Leak Test... 4a-21 4a.3.13 Display A/D Channels... 4a-22 4a.3.14 Display Discrete I/O Signals... 4a-24 4a.3.15 Display Battery Status... 4a-25 4a.3.16 Test Panel Switches... 4a-26 4a.3.17 Flow Valve Test Tool... 4a-27 4a.3.18 Adjust Drive Gas Regulator... 4a-28 4a.4 Calibrations... 4a-29 4a.4.1 O2 Calibrations... 4a-29 4a.4.2 Calibrate Flow Sensors... 4a-30 4a.4.3 Pressure Sensitivity... 4a-31 4a.4.4 Calibrate Flow Valve... 4a-32 4a.4.5 Bleed Resistor Calibration... 4a-33 4a.4.6 Service Calibrations Required... 4a-34

4b Self Tests and Service Mode - Software Revisions 1.X/3.X 4b.1 Self tests... 4b-3 4b.2 Service Mode Confirmation menu... 4b-4 4b.2.1 Set the altitude... 4b-5 4b.2.2 Set the language... 4b-5 4b.2.3 Set the serial connection... 4b-5 4b.3 Main Menu - Service Calibration Mode... 4b-6

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Table of Contents 4b.4 Diagnostic Tests... 4b-7 4b.4.1 Test CPU... 4b-7 4b.4.2 Test External RAM... 4b-7 4b.4.3 Test Display RAM... 4b-8 4b.4.4 Test Flash ROM... 4b-8 4b.4.5 Test EEPROM... 4b-9 4b.4.6 Test Panel Switches... 4b-9 4b.4.7 Test Serial Ports... 4b-10 4b.4.8 Test Flow Valve... 4b-11 4b.4.9 Test GIV (Gas Inlet Valve)... 4b-12 4b.4.10 Test DPL (Drive Pressure Limit) switch... 4b-13 4b.4.11 Test 5V Fail Alarm... 4b-14 4b.5 Diagnostic Tools... 4b-15 4b.5.1 Display A/D channels... 4b-15 4b.5.2 Display I/O signals... 4b-17 4b.5.3 Battery Charge Status... 4b-18 4b.5.4 System Error Log... 4b-19 4b.5.5 Alarm log... 4b-19 4b.6 Flow Valve Test Tool... 4b-20 4b.7 Test Breathing System for Leak... 4b-21 4b.8 Adjust Drive Gas Regulator... 4b-22 4b.9 Calibrations... 4b-23 4b.9.1 Calibrate O2 Sensor... 4b-23 4b.9.2 Calibrate Flow Sensors... 4b-24 4b.9.3 Pressure Sensitivity Calibration... 4b-25 4b.9.4 Calibrate Flow Valve... 4b-26 4b.9.5 Calibrate Bleed Resistor... 4b-27 4b.10 Schedule Service Calibration - Software 3.X... 4b-28 4b.11 Sensor(s) cal due - Software 1.X... 4b-29 4b.12 User Settings... 4b-30 4b.12.1 Select Altitude... 4b-30 4b.12.2 Select Drive Gas... 4b-30 4b.12.3 Adjust Brightness... 4b-31 4b.12.4 Select Heliox Mode... 4b-31 4b.12.5 VE Alarm Limits... 4b-32 4b.12.6 User Select Defaults... 4b-32

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Aestiva 7900 5 Calibration 5.1 Primary Regulators...5-2 5.1.1 Test setup for Primary Regulators...5-2 5.1.2 Testing Primary Regulators...5-3 5.1.3 Adjusting Primary Regulators... 5-10 5.2 Secondary Regulators... 5-15 5.2.1 Testing/Adjusting Secondary Regulators or Balance Regulators... 5-15 5.3 Needle Valve Calibration... 5-16 5.3.1 Summary... 5-16 5.3.2 O2 Needle Valve Calibration (Minimum Flow)... 5-16 5.3.3 N2O, CO2, and Heliox Needle Valve Calibration (Minimum Flow)... 5-18 5.3.4 Air Needle Valve Calibration (Minimum Flow)... 5-22 5.3.5 Needle Valve Calibration (Maximum Flow)... 5-25 5.4 Link system calibration... 5-26 5.5 O2 Flush Regulator... 5-31 5.6 Zero the pressure gauge... 5-33 5.6.1 Checking the pressure gauge accuracy... 5-34

6 Installation and Maintenance 6.1 Aestiva 7900 Installation Checklist...6-2 6.2 Lubricate absorber canister locking mechanism...6-3 6.3 Auxiliary O2 flowmeter tests...6-4 6.4 Integrated Suction Regulator tests...6-5 6.5 Cleaning and inspecting the bag to ventilator toggle...6-7 6.6 Supply gas inlet filter...6-8 6.7 Free breathing valve maintenance...6-9 6.8 MOPV differential relief valve test... 6-10 6.9 MOPV pressure relief valve test... 6-11

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Table of Contents 7 Troubleshooting 7.1 General Troubleshooting...7-2 7.2 Breathing System Leak Test Guide...7-5 7.2.1 Check Valves...7-6 7.2.2 Breathing System Troubleshooting Flowcharts...7-7 7.2.3 Breathing system leak test... 7-12 7.2.4 Leak Isolation Tests... 7-15 7.3 Troubleshooting instructions... 7-25 7.4 Immediate System Shutdown error codes... 7-26 7.5 System Error Log... 7-27 7.5.1 Error messages for Software Revision 4.X... 7-27 7.5.2 Error codes for Software Revisions 1.X and 3.X... 7-27 7.6 Alarm messages... 7-31 7.7 Mechanical/electrical troubleshooting guide... 7-49 7.8 Troubleshooting Flowcharts... 7-51 7.8.1 Ventilator assessment process... 7-51 7.8.2 No display troubleshooting... 7-52 7.8.3 Inaccurate volume ventilation troubleshooting... 7-53 7.8.4 No ventilation troubleshooting... 7-54 7.8.5 High intrinsic PEEP troubleshooting... 7-55 7.9 Power supply test points... 7-56 7.9.1 Power supply board (original CPU)... 7-56 7.9.2 Original CPU... 7-57 7.9.3 Power supply (Integrated CPU)... 7-58 7.10 Flow sensor check... 7-59

8 Software Installation

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Aestiva 7900 9 Repair Procedures 9.1 Servicing the ventilator...9-5 9.2 How to bleed gas pressure from the machine...9-5 9.3 How to remove the rear panel...9-6 9.4 How to remove the side panels...9-7 9.5 Service the pipeline inlet (pneumatic) manifold...9-8 9.5.1 Remove pneumatic manifold...9-8 9.5.2 Replace pipeline inlet fitting...9-9 9.5.3 Replace pipeline inlet filter...9-9 9.5.4 Replace pipeline inlet check valve... 9-10 9.5.5 Replace pneumatic O2 power outlet... 9-11 9.5.6 Rebuild flush regulator... 9-12 9.5.7 Replace high-pressure relief valve... 9-14 9.5.8 Change drive gas... 9-15 9.6 Service the cylinder supply modules... 9-16 9.6.1 Tightening procedure for high-pressure tube fittings... 9-16 9.6.2 Replace primary regulator module (complete replacement)... 9-16 9.6.3 Replace 4th- and 5th-gas cylinder supply module... 9-17 9.7 Service pipeline and cylinder pressure gauges... 9-18 9.7.1 Remove gauge panel... 9-18 9.7.2 Replace pipeline or cylinder pressure gauges... 9-19 9.8 Replace system switch assembly... 9-20 9.9 Service the flowmeter module... 9-24 9.9.1 Remove front flowmeter panel shield... 9-24 9.9.2 Remove flowtubes for cleaning or replacement... 9-25 9.9.3 Remove complete flowmeter head... 9-26 9.9.4 Replace flowmeter modules... 9-28 9.9.5 Replace flowmeter frame... 9-32 9.9.6 Replace O2 supply switch... 9-33 9.9.7 Checkout procedure for O2 supply switch... 9-34 9.9.8 Replace secondary regulator manifold or balance regulator manifold... 9-35 9.9.9 Replace O2 or N2O needle valves... 9-36 9.9.10 Replace 3rd or 4th gas needle valves... 9-38 9.10 Service vaporizer manifold parts... 9-39 9.10.1 Repair manifold port valve... 9-39 9.10.2 Checkout procedure for manifold port valve... 9-40 9.10.3 Replace vaporizer manifold check valve... 9-41 9.10.4 Replace vaporizer pressure relief valve... 9-43 9.10.5 Replace vaporizer manifold (complete replacement)... 9-44

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Table of Contents 9.11 Service common gas manifold... 9-45 9.11.1 Replace common gas manifold... 9-45 9.11.2 Replace common gas manifold check valve... 9-46 9.11.3 Replace O2 flush switch... 9-47 9.12 Control panel assembly (Display Module)... 9-48 9.12.1 Display components... 9-49 9.12.2 Encoder switch... 9-51 9.12.3 Alarm speaker... 9-52 9.13 Access to electrical enclosure components... 9-53 9.13.1 CPU Board... 9-55 9.13.2 Firmware replacement procedure... 9-56 9.13.3 Power supply board (for original CPU)... 9-57 9.13.4 Power supply (for Integrated CPU)... 9-58 9.13.5 Toroid (original CPU only)... 9-59 9.13.6 Battery... 9-60 9.14 Vent Engine... 9-61 9.15 Non-relieving regulator... 9-63 9.16 Flow control valve... 9-64 9.17 Gas inlet valve... 9-65 9.18 Mechanical Overpressure Valve (MOPV assembly)... 9-67 9.18.1 To service the original MOPV assembly:... 9-67 9.18.2 To service the MOPV assembly with the molded housing:... 9-69 9.19 Drive gas check valve assembly... 9-70 9.20 Service the breathing system... 9-71 9.20.1 Remove control panel cover... 9-71 9.20.2 Replace control panel cover... 9-71 9.20.3 Replace control panel microswitch... 9-72 9.20.4 Replace Bag-to-Vent toggle or microswitch... 9-73 9.20.5 Replace adjustable pressure limiting (APL) knob assembly... 9-78 9.20.6 Replace APL disc or cage... 9-80 9.20.7 Replace airway pressure gauge... 9-81 9.20.8 Remove or replace canister and dishes... 9-82 9.20.9 Replace breathing system canister release handle and release mechanism . 9-82 9.20.10 Replace canister microswitch... 9-83 9.20.11 To remove the front subfloor... 9-84 9.20.12 To remove the rear subfloor... 9-85 9.20.13 Replace circuit module identification printed circuit board (ID PCB)... 9-86 9.20.14 Replace common gas outlet (CGO) assembly... 9-87 9.20.15 Replace the bulkhead... 9-88 9.20.16 Replace ACGO or ACGO microswitch... 9-90 9.20.17 Disassemble ACGO to replace seals... 9-91 9.20.18 Replace enhanced sensor interface board (ESIB)... 9-93

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Aestiva 7900 9.21 CO2 Bypass repair procedures... 9-95 9.21.1 Disassembly... 9-95 9.21.2 Replacement Procedure... 9-96 9.21.3 Assembly... 9-96 9.22 Service the breathing system with an articulating arm... 9-101 9.22.1 Removing the rear panel... 9-101 9.22.2 Latch adjustment... 9-101 9.22.3 Check/adjust tension of absorber arm... 9-101 9.23 Remove or replace drawer slides... 9-102 9.23.1 Replace drawer lock assembly... 9-103 9.23.2 Remove or replace lower shelves... 9-104 9.23.3 Replace side panel for drawer enclosure... 9-104 9.24 Replace O2 Flush components... 9-105 9.24.1 Replace O2 flush button... 9-105 9.24.2 Replace O2 flush valve block... 9-106 9.25 Replace auxiliary flowmeter or suction regulator... 9-107 9.26 Repair or replace display arm... 9-108 9.27 Display mount adjustment... 9-110 9.27.1 Standard mount... 9-110 9.27.2 Heavy duty mount... 9-110 9.28 Replace Front Casters... 9-112 9.29 Replace Back Casters... 9-114 9.30 Replace flip-up shelf... 9-115 9.31 Replace light package bulbs or panel... 9-116 9.32 Replace Tec 7 filler cap or filler cap o-ring... 9-117

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Table of Contents 10 Illustrated Parts 10.1 Test Devices... 10-4 10.2 Special instructions... 10-5 10.3 Software tools... 10-5 10.4 Service tools... 10-6 10.4.1 Service tools (not shown)... 10-7 10.4.2 Secondary regulator pilot pressure tool... 10-7 10.5 Touch-up paint... 10-8 10.6 Casters, brake, and work surface... 10-9 10.7 Handles and 3-Vap panels . ... 10-10 10.8 Rear panel - upper... 10-11 10.9 Rear panel - lower... 10-12 10.10 Side panels... 10-13 10.11 AC inlets and Power cords... 10-15 10.11.1 AC Inlet Components... 10-16 10.12 Flush Button/Valve... 10-18 10.13 Display folding mount -7900... 10-19 10.14 Display Arm... 10-20 10.14.1 Arm parts list... 10-20 10.14.2 Shoulder parts list... 10-22 10.14.3 Display mount parts (standard)... 10-24 10.14.4 Display mount parts (heavy duty)... 10-25 10.15 Cylinder Gas Supplies... 10-26 10.15.1 Cylinder inlet fittings... 10-27 10.16 Main manifold... 10-28 10.16.1 O2 flush regulator... 10-28 10.16.2 Pipeline inlet fittings... 10-29 10.17 Power outlets and Heliox pipeline inlet... 10-30 10.18 Common gas manifold... 10-31 10.19 Pressure gauges and gauge panel... 10-32 10.19.1 Pressure gauge labels... 10-33 10.20 Electrical enclosure parts (original CPU)... 10-34 10.21 Electrical enclosure parts (integrated CPU)... 10-36 10.22 Display Module (original - EL)... 10-38 10.22.1 Rear housing parts... 10-38 10.22.2 Front housing parts... 10-39 10.23 Display Module (LCD)... 10-40 10.23.1 LCD Display Module parts... 10-40

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Aestiva 7900 10.24 Aestiva 7900 Vent Engine... 10-42 10.24.1 Gas Inlet Valve... 10-43 10.24.2 Mechanical Over Pressure Valve (MOPV)... 10-44 10.24.3 Inlet filter... 10-45 10.24.4 Free Breathing Valve... 10-46 10.24.5 Manifold... 10-47 10.24.6 Tube Assembly... 10-48 10.24.7 Twin Tube Lifter... 10-49 10.25 Vent Engine mounting bracket... 10-50 10.26 Enhanced Sensor Interface Board (ESIB)... 10-51 10.27 Flowmeter components... 10-52 10.27.1 Flowtube parts... 10-54 10.27.2 Secondary regulator components... 10-56 10.28 Vaporizer manifold... 10-58 10.29 Vaporizer service parts... 10-60 10.29.1 G-Flange Seal Replacement Kits... 10-60 10.29.2 Tec 6 Plus Fixed Filler service parts kits... 10-61 10.29.3 Tec 7 service parts... 10-61 10.30 Breathing System - service parts... 10-62 10.30.1 Breathing System - user replaceable parts... 10-64 10.30.2 Control Panel... 10-70 10.30.3 Chassis Upper... 10-72 10.30.4 Bulkhead... 10-74 10.30.5 Chassis Lower... 10-76 10.30.6 Absorber (CO2) bypass... 10-77 10.30.7 Bag Arms... 10-78 10.30.8 Auxiliary common gas outlet (ACGO)... 10-79 10.31 Anesthetic Gas Scavenging System - AGSS... 10-80 10.31.1 Passive AGSS... 10-80 10.31.2 Active AGSS... 10-82 10.32 Articulating Arm... 10-84 10.32.1 Support Column and Arm Assembly... 10-84 10.32.2 Articulating arm accessory items... 10-86 10.33 Lower Shelve Kits... 10-88 10.33.1 Parts List for Shelf Kits... 10-88 10.34 Drawer and Shelf Accessory Mounting Kit... 10-90 10.35 Drawer, Standard 11 cm Locking... 10-91 10.36 Drawer, Optional 15 cm Non-locking... 10-92 10.37 Flip up shelf... 10-93 10.38 Ventilator Harnesses... 10-94 10.39 Legris quick-release fittings... 10-95

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Table of Contents 10.40 Tubing charts... 10-96 10.40.1 Main manifold tubing... 10-96 10.40.2 2nd Cylinder (Air, N2O, O2) and CO2 or Heliox tubing... 10-98 10.40.3 Copper tubing kits... 10-99 10.40.4 Breathing System tubing... 10-100 10.41 Integrated Suction Regulator and Auxiliary O2 Flowmeter... 10-101 10.41.1 Major Components (vacuum suction)... 10-101 10.41.2 Suction Housing Components... 10-102 10.41.3 Regulator Assembly (3 mode)... 10-103 10.41.4 Rear-Panel Fittings... 10-104 10.41.5 1Auxiliary O2 Flowmeter... 10-105 10.41.6 Venturi Suction Housing Components... 10-106 10.41.7 Venturi Suction Regulator front view (2 mode)... 10-107 10.41.8 Venturi Suction Regulator rear view (2 mode)... 10-108 10.42 Labels... 10-109 10.43 Upper shroud parts (lighting and bezel)... 10-110 10.44 Upper shelf kits with cable management... 10-111 10.45 Suction bottle mounting arm and post kits... 10-112

11 Schematics and Diagrams

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Aestiva 7900 12 Aestiva/5 MRI 12.1 Overview... 12-2 12.1.1 Configuration Options... 12-2 12.1.2 Vaporizer Compatibility... 12-2 12.1.3 Enhanced MRI... 12-2 12.2 Service Requirements... 12-4 12.2.1 Testing and Calibration... 12-4 12.2.2 Maintenance... 12-4 12.2.3 Battery information... 12-4 12.3 Aestiva/5 MRI Parts... 12-5 12.3.1 CriticalMRI Components... 12-5 12.3.2 Parts Notation... 12-5 12.3.3 Warning Labels... 12-5 12.4 Repair Procedures... 12-18 12.4.1 Installing a snap-on ferrite in an Aestiva/5 MRI... 12-18 12.4.2 Replacing the electrical enclosure gasket seal... 12-19 12.5 Test procedures... 12-20 12.5.1 Testing the LED lights... 12-20 12.5.2 Testing in MRI environment... 12-21

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Table of Contents 13 Maintenance Procedures 13.1 Aestiva 7900 Planned Maintenance Checkout Procedure... 13-2 13.1.1 Aestiva 7900 Planned Maintenance Checklist... 13-2 13.2 Parts Replacement... 13-3 13.3 Six-month planned maintenance procedures... 13-4 13.3.1 User maintenance... 13-4 13.3.2 Inspect the system... 13-5 13.3.3 Pipeline and cylinder tests... 13-6 13.3.4 Low-pressure leak test... 13-7 13.3.5 Breathing system tests... 13-9 13.3.6 Power failure test... 13-12 13.3.7 Electrical Safety Checks... 13-13 13.3.8 Final Machine Checks... 13-14 13.4 Twelve-month planned maintenance procedures... 13-15 13.4.1 User maintenance... 13-15 13.4.2 Lubricate absorber canister locking mechanism... 13-16 13.4.3 Inspect the system... 13-17 13.4.4 Cleaning and inspecting the bag to ventilator toggle... 13-18 13.4.5 Inspect the APL Valve... 13-18 13.4.6 Pipeline and cylinder tests... 13-19 13.4.7 Flow control and pressure relief tests... 13-20 13.4.8 Vaporizer back pressure and interlock test... 13-23 13.4.9 Low-pressure leak test... 13-24 13.4.10 Checking the Airway Pressure Gauge accuracy... 13-26 13.4.11 Alarm tests... 13-27 13.4.12 Breathing system tests... 13-29 13.4.13 Auxiliary O2 flowmeter tests... 13-32 13.4.14 Integrated Suction Regulator tests... 13-33 13.4.15 Supply gas inlet filter... 13-35 13.4.16 MOPV differential relief valve test... 13-36 13.4.17 MOPV pressure relief valve test... 13-37 13.4.18 7900 Ventilator Checks, Tests and Calibrations (SW 4.X)... 13-38 13.4.19 7900 Ventilator Checks, Tests and Calibrations (SW 1.X/3.X)... 13-48 13.4.20 Power failure test... 13-58 13.4.21 Electrical Safety Checks... 13-59 13.4.22 Final Machine Checks... 13-60

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1 Introduction

In this section

This section provides a general overview of the Aestiva 7900 Anesthesia Machine. 1.1 What this manual includes...1-2 1.2 Standard service procedures...1-3 1.2.1 Operation manuals...1-3 1.2.2 Software versions...1-3 1.2.3 Ventilator tests...1-3 1.3 System overview...1-4 1.4 Configuration options...1-5 1.5 Symbols used in the manual or on the equipment...1-9

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