Mindray A7 Service Manual
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Mindray A7 Service Manual

Anesthesia system
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Anesthesia System

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Summary of Contents for Mindray A7

  • Page 1 Service Manual ™ Anesthesia System...
  • Page 2 Service Manual ™ Anesthesia System...
  • Page 3 A7™ is U.S. trademarks of Mindray DS USA, Inc. Selectatec® is a registered trademark of Ohmeda. Copyright © Mindray DS USA, Inc., 2014 to 2016. All rights reserved. Contents of this publication may not be reproduced in any form without permission of Mindray DS USA, Inc.

  • Page 5: Table Of Contents

    Introduction......................................1 - 2 Electrical and Pneumatic Connections ............................1 - 4 Electrical Connections .......................................1 - 4 Pneumatic Connections (A7)...................................1 - 7 Connections Between Pneumatic Circuit, Breathing System and Ventilator Control Board..........1 - 10 Gas Flow ......................................1 - 12 Pneumatic Circuit Diagram................................... 1 - 12 Parts List..........................................
  • Page 6 Periodical Maintenance Schedule ..............................3 - 2 Checklist before surgery...................................3 - 3 Visual Inspection Checklist ................................3 - 4 List of Periodic Maintenance Parts to be Replaced and Checked ..................3 - 4 Battery Maintenance and Replacement .............................3 - 8 Functional Tests....................................3 - 8 046-006272-00 A7™ Service Manual...
  • Page 7 Cautions ..........................................4 - 2 Notes ............................................4 - 3 System Calibration....................................4 - 3 Flow Calibration (User) ......................................4 - 4 Flow Calibration (Service)....................................4 - 8 Pressure Calibration (Service) ..................................4 - 30 Pressure and Flow Zeroing (Service) ................................. 4 - 45 A7™ Service Manual 046-006272-00...
  • Page 8 Remove the Electronically Controlled ACGO Drive Valve........................6 - 62 Remove the Built-in Anesthesia Module..............................6 - 63 Remove the ACGO Assembly (electronically controlled)........................6 - 65 Remove Anesthesia Module Inlet Pipeline Assembly ......................... 6 - 66 046-006272-00 A7™ Service Manual...
  • Page 9 Ordering Replaceable Parts .....................................7 - 2 Diagrams and Tables......................................7 - 3 Warranty................................8 - 1 Warranty Statements..................................8 - 2 Disclaimers ......................................8 - 3 Manufacturer's Responsibility ................................8 - 3 Phone Numbers and How to Get Assistance ..........................8 - 3 A7™ Service Manual 046-006272-00...
  • Page 10 Table of Contents This page intentionally left blank. 046-006272-00 A7™ Service Manual...

  • Page 11: Foreword

    The use of anti-static or electrically conductive respiration tubes, when utilizing high frequency electric surgery equipment, may cause burns and is therefore not recommended in any application of this machine. WARNING: Possible electric shock hazard. The machine may only be opened by authorized service personnel. A7™ Service Manual 046-006272-00...

  • Page 12: Cautions

    This device uses high pressure compressed gas. When attaching or disconnecting backup gas cylinders, always turn the cylinder valves slowly. Use the A7 flow meters to bleed down the pressure, watching the cylinder gauge indicate the depleting cylinder pressure, before disconnecting the cylinder from the yoke.

  • Page 13: Notes

    After changing the CO2 absorbent, carry out a vaporizer and system leak test. CAUTION: Only Selectatec™ compatible vaporizers with Interlock-System may be used with the A7 unit. CAUTION: After each exchange of a vaporizer, carry out a system Leak test. CAUTION: Do not clean the machine while it is on and/or plugged in.
  • Page 14 Introduction Notes This page intentionally left blank. 046-006272-00 A7™ Service Manual...

  • Page 15: Theory Of Operation

    Gas Flow ........................................1-12 Anesthesia System Components..............................1-42 The Breathing System ..................................1-44 Ventilator UI....................................... 1-49 Ventilator Control and Drive ................................1-49 Electrical Flow Control System ..............................1-81 Ventilator Pneumatic- O2 Drive Gas............................1-91 A7™ Service Manual 046-006272-00 1 - 1...

  • Page 16: Introduction

    Safety systems within the A7 work to prevent hypoxic mixtures from being delivered to the patient. Nitrous oxide will not be delivered unless oxygen pressure is present.
  • Page 17 90 minutes. The main system switch can power on and off the system. The four auxiliary AC sockets on the A7 at the rear of the machine operate independent of the main system switch.

  • Page 18: Electrical And Pneumatic Connections

    Electrical and Pneumatic Connections Theory of Operation Electrical and Pneumatic Connections 1.2.1 Electrical Connections FIGURE 1-1 1 - 4 046-006272-00 A7™ Service Manual...
  • Page 19 Theory of Operation Electrical and Pneumatic Connections Description Power Board (A7) 115-018145-00 Battery Interface Board 801-0631-00109-00 CPU Board 115-040636-00 IndicatorLight Board 051-001257-00 Infrared Communication Board 801-0621-00165-00 Anesthesia Signal Interface Board 801-0613-00033-00 Display Interface Board 051-001258-00 051-001519-00 (old) Backlight Inverter Board...
  • Page 20 Cable, Total Flowmeter Backlight 009-002931-00 Cable, Flowmeter Switch Signal 009-002929-00 Cable, Backup Needle Valve Switch(without N2O) 009-005146-00 Cable, Flow Sensor 009-002481-01 Cable, Flowmeter 3 way Valve B 009-002937-00 Cable, Ventilator 009-000979-00 Cable, Three Way Valve(ACGO) 009-002592-00 1 - 6 046-006272-00 A7™ Service Manual...

  • Page 21: Pneumatic Connections (A7)

    Theory of Operation Electrical and Pneumatic Connections 1.2.2 Pneumatic Connections (A7) FIGURE 1-2 A7™ Service Manual 046-006272-00 1 - 7...
  • Page 22 Auxiliary Gas Outlet M6G-020026--- Auxiliary Air Assembly 082-000520-00 Auxiliary Gas Outlet 082-000521-00 O2 Pipeline Assembly 082-000521-00 082-000522-00 082-000522-00 Drive Valve(UP) 082-000522-00 Drive Valve(DOWN) 082-000522-00 Drive Valve(DOWN) ACGO Assembly(Electric) 082-000522-00 Drive Valve(UP) ACGO Assembly(Electric) 082-000522-00 1 - 8 046-006272-00 A7™ Service Manual...
  • Page 23 Pipeline Vacuum Suction Control M6G-020045--- Suction Control Over flow Unit M6G-020045--- Three-way Connector 8 082-000583-00 Three-way Connector 6 082-000582-00 Four-way Connector 8 082-001197-00 Four-way Connector 6 082-001201-00 Two-way Connector 6 to 4 082-001285-00 A7™ Service Manual 046-006272-00 1 - 9...

  • Page 24: Connections Between Pneumatic Circuit, Breathing System And Ventilator Control Board

    Electrical and Pneumatic Connections Theory of Operation 1.2.3 Connections Between Pneumatic Circuit, Breathing System and Ventilator Control Board FIGURE 1-3 1 - 10 046-006272-00 A7™ Service Manual...
  • Page 25 A21-000007--- Hardware Box Connector Three-way Valve A21-000007--- CPC Connector Breathing System Connector M6G-020026--- Gas Reservoir Exhaust Gas Letout Pipe 082-002365-00 Breathing System Connector Exhalation Gas Assembly 115-037605-00 Two-way Connector M02A-10-25945 Three-way Connector M90-100030--- A7™ Service Manual 046-006272-00 1 - 11...

  • Page 26: Gas Flow

    Gas Flow Theory of Operation Gas Flow 1.3.1 Pneumatic Circuit Diagram FIGURE 1-4 1 - 12 046-006272-00 A7™ Service Manual...

  • Page 27: Parts List

    Check Valve2 Auxiliary Flow Needle Valve Flow Sensor Auxiliary O2 Gas Power Outlet Proportional Valve Suction Regulator 3-way Valve Vacuum Gauge Pressure Sensor Overflow Safety Trap Backpressure Valve Filter Total Flowmeter Collection Container A7™ Service Manual 046-006272-00 1 - 13...

  • Page 28: Key To Symbols

    O2 output , auxiliary O2 supply and flushing O2), or AIR-O2 mixture. The following figure shows the pneumatic circuit of the anesthetic gas delivery system.The ACGO is configured in electrical modes FIGURE 1-5 1 - 14 046-006272-00 A7™ Service Manual...
  • Page 29 1.3.4.2 Gas Supplies The A7 anesthesia machine supports three gas supplies: O2, N2O and AIR. All the gas supply interfaces are designed based on IEC 60601-2-13, which prevents misconnection between different gases. The A7 gas supply inlet assemblies comprise the pipeline gas supply inlet assembly and cylinder gas supply inlet assembly.
  • Page 30 200 kPa. (The filter can be replaced after the pipeline gas supply connector is removed). FIGURE 1-7 1 - 16 046-006272-00 A7™ Service Manual...
  • Page 31 The connector complies with CGA V-1. Cylinders of the E size are supported. The capacity of a cylinder is limited; therefore, it is recommended that the cylinder gas supply is used as the backup gas supply to prevent gas supply exhaustion. FIGURE 1-9 A7™ Service Manual 046-006272-00 1 - 17...
  • Page 32 This design is only used to ensure that one tact switch can operate properly when the other tact switch fails. When the two PINs of either tact switch are shorted, the system power supply will be switched on. 1 - 18 046-006272-00 A7™ Service Manual...
  • Page 33 Theory of Operation Gas Flow FIGURE 1-11 1.3.4.4 Flow Control System - EFCS FIGURE 1-12 A7™ Service Manual 046-006272-00 1 - 19...
  • Page 34 Flow Control System - BFCS The BFCS of the A7 comprises two mechanical needle valves that are used to control the flow of the O2 and air limbs and control the O2-AIR ratio. After passing through the two independent check valves in the mixing chamber, the gases of the two limbs are mixed and finally output.
  • Page 35 The following figure is a model of the BFCS backup needle valve module. A7™ Service Manual 046-006272-00 1 - 21...
  • Page 36 Gas Flow Theory of Operation FIGURE 1-15 FIGURE 1-16 1 - 22 046-006272-00 A7™ Service Manual...
  • Page 37 The following figure shows the position of the back pres- sure valve in the system. FIGURE 1-17 The following figure shows the structure model and the corresponding interface information. A7™ Service Manual 046-006272-00 1 - 23...
  • Page 38 EFCS and BFCS. Upon power-on, the EFCS limb is switched on and the BFCS limb is switched off; upon power-off, the EFCS limb is switched off and the BFCS limb is switched on. The following figure shows the position of the three-way valve in the system. FIGURE 1-19 1 - 24 046-006272-00 A7™ Service Manual...
  • Page 39 Located on the main limb of the pneumatic circuit, the total flow meter can monitor the total flow of the EFCS or BFCS. The following figure shows the position of the total flow meter in the system. FIGURE 1-21 A7™ Service Manual 046-006272-00 1 - 25...
  • Page 40 The following figure shows the position of the vaporizer manifold in the system. FIGURE 1-23 1 - 26 046-006272-00 A7™ Service Manual...
  • Page 41 The valve core pushes rightwards by the drive gas to implement ACGO state switching. Then, the fresh gas will be output from the patient circuit outlet of the ACGO assembly. A7™ Service Manual 046-006272-00 1 - 27...
  • Page 42 FIGURE 1-26 Independent ACGO Outlet When the ACGO assembly is switched to the ACGO state, the fresh gas will be output from the inde- 1 - 28 046-006272-00 A7™ Service Manual...
  • Page 43 O2 supply is normal. The O2 flush valve has a slide valve structure inside that ensures automatic reset each time the valve is depressed and released via the spring. The following figure shows the position of the O2 flush valve in the system. A7™ Service Manual 046-006272-00 1 - 29...
  • Page 44 After being mixed, the oxygen and air are output. The following figure shows the position of the auxiliary gas supply assembly in the system. 1 - 30 046-006272-00 A7™ Service Manual...
  • Page 45 Theory of Operation Gas Flow FIGURE 1-31 The following figure shows the structure model and the corresponding interface information. FIGURE 1-32 A7™ Service Manual 046-006272-00 1 - 31...
  • Page 46 The mechanical pressure relief valve (57) ensures that the tube pressure after the expiratory valve is less than 10 cm H2O. The following figure is a picture of the pneumatically-controlled module of the anesthetic ventilator. 1 - 32 046-006272-00 A7™ Service Manual...
  • Page 47 During expiration, the patient's expired gas goes into the bag inside the bellows. The sodalime absorber canister (integrating 43 and 44) absorbs CO2 that the patient expires. The following figure shows the pneumatic circuit of the breathing system. A7™ Service Manual 046-006272-00 1 - 33...
  • Page 48 The breathing system is connected to the anesthesia machine main unit through the circuit adapter. The breathing system is highly integrated, as its tubes are all internal as shown in the following figure. FIGURE 1-36 1 - 34 046-006272-00 A7™ Service Manual...
  • Page 49 Excess water condensed from the exhaled gas is collected in the water collection cup, located on the bottom side of the breathing system. The breathing system is easily disassembled and is autoclavable at 134 A7™ Service Manual 046-006272-00 1 - 35...
  • Page 50 (46), and inspiratory flow sensor (47) to the patient. During expiration, gas flows through the expiratory flow sensor (48), expiratory check valve (45), and Auto/Manual ventilation switch (54) to the bellows. Airway pressure is monitored by the airway pressure gauge (46). 1 - 36 046-006272-00 A7™ Service Manual...
  • Page 51 The ventilator controls the drive gas to depress the bag inside bellows (55) and supply gas for the breathing system according to the selected ventilation mode. A7™ Service Manual 046-006272-00 1 - 37...
  • Page 52 In the following figure, the red arrows indicate the direction of the anesthetic gas. Currently, this path is integrated into the main unit of the patient breathing circuit. 1 - 38 046-006272-00 A7™ Service Manual...
  • Page 53 The following figure shows the model for electrical ACGO with sampling for anesthesia calculation. FIGURE 1-42 NOTE: The anesthesia calculation inlet/outlet sampling connectors are relative to the inlet/outlet of the anesthesia module. The following figure shows the tube connection of the anesthesia calculation module. A7™ Service Manual 046-006272-00 1 - 39...
  • Page 54 The receiving system is connected to the receiving hose through the 30 mm connector. The following picture shows the AGSS structure and the connections between the AGSS transfer system, receiving system, and disposal system. 1 - 40 046-006272-00 A7™ Service Manual...
  • Page 55 Theory of Operation Gas Flow FIGURE 1-45 A7™ Service Manual 046-006272-00 1 - 41...

  • Page 56: Anesthesia System Components

    1.4.1 Auxiliary Outlets The A7 anesthesia system has four 125V 15A Hospital Grade auxiliary outlets. Each outlet has one 250V 3A breaker. Additionally, a main breaker limits the combined current of the four outlets to 10A. FIGURE 1-46 Auxiliary Outlet Diagram for the A7 1.4.2...
  • Page 57 FIGURE 1-50 Flow Meter Lighting Board, Bottom View Flow Meter Lighting Board Interface, J1 NAME FUNCTION 12V Power Supply of the Flow Meter Lighting board Ground Ground LIGHT_IN Flow Meter Lighting Control Signal A7™ Service Manual 046-006272-00 1 - 43...

  • Page 58: The Breathing System

    The Breathing System 1.5.1 Brief Introduction The A7 breathing system supports three operating modes: mechanical ventilation, manual ventilation, and standby. These modes allow the operator to apply proper ventilation strategies based on the patient's needs. The types of flow paths through the breathing system vary with the operating mode or status.

  • Page 59: Automatic Mode, Expiration

    CO2 absorber canister, into the breathing circuit, and through the inspiratory check valve to the patient. During inspiration, fresh gas flows from the machine into the inspiratory limb, upstream of the inspiratory check valve. A7™ Service Manual 046-006272-00 1 - 45...

  • Page 60: Manual Mode, Expiration

    During exhalation, fresh gas enters the Breathing System. Residual fresh gas passes through the APL valve to the AGSS. 1 - 46 046-006272-00 A7™ Service Manual...

  • Page 61: Pneumatic Peep

    The ventilator's driving system is a flow generator. Driving gas fills the bellows dome to compress the bellows. The breathing gas is pressed out of the bellows into the patient breathing circuit. The bellows is refilled with fresh gas and the expired gas from the patient. A7™ Service Manual 046-006272-00 1 - 47...
  • Page 62 Breathing System. 1.5.8.5 APL (Airway Pressure Limiting) Valve In manual mode, the APL Valve acts as a normal spring-loaded pressure relief valve, limiting the maximum pressure in the Breathing System. 1 - 48 046-006272-00 A7™ Service Manual...

  • Page 63: Ventilator Ui

    FIGURE 1-55 Display Interface Board, Top View FIGURE 1-56 Display Interface Board, Bottom View Inverter interface, J1 NAME FUNCTION Inverter 12V Power Supply Inverter 12V Power Supply Ground Ground LCD_EN LCD Backlight Enable LCD_BR LCD Backlight Brightness Control A7™ Service Manual 046-006272-00 1 - 49...
  • Page 64 Serial Port Receive Signal of the Display Interface Board Lighting Lighting Control Signal USB+ USB Signal USB- USB Signal Lighting_12V Lighting 12 V Power Supply 12V Power Supply 12V Power Supply Ground Ground Ground 1 - 50 046-006272-00 A7™ Service Manual...
  • Page 65 The anesthesia machine is fitted up with a 15-inch 24-bit 1024x768 LVDS display as the main output component, and a 15-inch touchscreen as the main input component (another touchpad is available on the A7 anesthesia machine). A7™ Service Manual 046-006272-00...
  • Page 66 BL_ON/OFF Inverter Enable Signal 12V Power Supply 12V Power Supply 12V Power Supply Inverter Board Interface, J2 and J3 NAME FUNCTION High_Voltage High-Voltage Output of the Inverter Low_Voltage Low-Voltage Output of the Inverter 1 - 52 046-006272-00 A7™ Service Manual...
  • Page 67 BCON Screen Backlight Enable Signal DIMMING Screen Backlight Control Signal None Connection Screen Backlight Board Interface, J2 NAME FUNCTION Ground Screen Backlight Control PWM Signal LED_EN Screen Backlight Enable Signal 12V Power Supply A7™ Service Manual 046-006272-00 1 - 53...
  • Page 68 FIGURE 1-64 Touchscreen Control Board, Top View Touchscreen Control Board Interface, J3 NAME FUNCTION 5 V Power Supply RXD_touch Serial Port Receive Signal of the Touchscreen Control Board TXD_touch Serial Port Transmit Signal of the Touchscreen Control Board Ground 1 - 54 046-006272-00 A7™ Service Manual...
  • Page 69 Depress of Encoder 2 (Reserved) Fresh Flow Sensor Board Interface, J2 and J3 NAME FUNCTION 5 V Power Supply Encoder_A Output A of Encoder Encoder_B Output B of Encoder Encoder_Y Depress of Encoder (Reserved) Ground Ground A7™ Service Manual 046-006272-00 1 - 55...
  • Page 70 FIGURE 1-67 Indicator Light Board, Top View FIGURE 1-68 Indicator Light Board, Bottom View Indicator Light Board interface, J1 NAME FUNCTION LED_BAT Battery Indicator Light Drive Signal LED_AC AC Indicator Light Drive Signal Ground 1 - 56 046-006272-00 A7™ Service Manual...

  • Page 71: Cpu Board

    Theory of Operation Ventilator UI 1.6.2 CPU Board FIGURE 1-69 CPU Board, Top View A7™ Service Manual 046-006272-00 1 - 57...
  • Page 72 Negative End of Receive Signal No Definition No Definition USB Interface, J8 NAME FUNCTION USB Power Supply USB Data Signal – (Negative) USB Data Signal + (Positive) Ground USB Power Supply USB Data Signal – (Negative) 1 - 58 046-006272-00 A7™ Service Manual...
  • Page 73 Ventilator UI NAME FUNCTION USB Data Signal + (Positive) Ground RS-232 Interface, J4 NAME FUNCTION No Connection RS-232 Receive Signal RS-232 Transmit Signal No Connection Ground No Connection No Connection No Connection No Connection A7™ Service Manual 046-006272-00 1 - 59...

  • Page 74: Ventilator Control And Drive

    Theory of Operation Ventilator Control and Drive 1.7.1 Mother Board The mother board provides signal interfaces for all boards and electrical components. FIGURE 1-71 Mother Board, Top View FIGURE 1-72 Mother Board, Bottom View 1 - 60 046-006272-00 A7™ Service Manual...
  • Page 75 Calibration Serial Port Transmit Signal RXD_CALIBRATE Calibration Serial Port Receive Signal Ground 12V Power Supply Pneumatic Assembly Interface, J2 NAME FUNCTION 7Vout_or_5Vout Pressure Relief Valve Power Supply SAFE_VALVE Pressure Relief Valve Drive Signal A7™ Service Manual 046-006272-00 1 - 61...
  • Page 76 Circuit Switch Ground NTC_R11 Signal of Thermistor 1 NTC_R12 Signal of Thermistor 2 NTC_R21 Signal of Thermistor 1 NTC_R22 Signal of Thermistor 2 HEA_PWR_15V Heater Drive Voltage Signal HEA_PWR_15V Heater Drive Voltage Signal Ground 1 - 62 046-006272-00 A7™ Service Manual...
  • Page 77 LVDS_DATA2+ LVDS Data Difference to Positive Signal 2 LVDS_DATA2- LVDS Data Difference to Negative Signal 2 Ground LVDS_DATA3+ LVDS Data Difference to Positive Signal 3 LVDS_DATA3- LVDS Data Difference to Negative Signal 3 A7™ Service Manual 046-006272-00 1 - 63...
  • Page 78 TOUCHPAD_USB Difference to Negative Signal 12VA_1 12V Power Supply Ground RSVDRXD_AG Built-in AG Module Receive Signal RSVDTXD_AG Built-in AG Module Transmit Signal Calibration Interface, J5 NAME FUNCTION No Connection No Connection No Connection No Connection No Connection 1 - 64 046-006272-00 A7™ Service Manual...
  • Page 79 Power Board Serial Port (transmits signal) Power Board Cooling Fan Drive Ground LED-BAT Battery Status Indicator Light Drive Output LCD_EN Backlight Enable Signal LED-AC AC Status Indicator Light Drive Output LCD_BR Backlight Brightness Control Voltage A7™ Service Manual 046-006272-00 1 - 65...
  • Page 80 #1 12V Power Supply Voltage Output Ground 12VA #1 12V Power Supply Voltage Output 12VA #1 12V Power Supply Voltage Output No Connection 15V2 15.2V Supply Voltage Output No Connection 15V2 15.2V Supply Voltage Output 1 - 66 046-006272-00 A7™ Service Manual...
  • Page 81 CPU Board Interface Chip Power Supply Ground Ground Not Connected Not Connected Not Connected SPK_OUT+ Speaker Drive Signal + SPK_OUT- Speaker Drive Signal - Ground VGA_Red VGA Red Signal VGA_Green VGA Green Signal VGA_Blue VGA Blue Signal A7™ Service Manual 046-006272-00 1 - 67...
  • Page 82 LVDS Data Signal LVDS-TO3- LVDS Data Signal Ground LVDS-TOC+ LVDS Clock Signal LVDS-TOC- LVDS Clock Signal Ground TXD_MON_BRD Ventilator Control Board Serial Port Transmit Signal RXD_MON_BRD Ventilator Control Board Serial Port Receive Signal Ground 1 - 68 046-006272-00 A7™ Service Manual...
  • Page 83 High level 2.4~5; RXD_FLOW Receive Signal Low level 0~0.4 Power Board Serial Port Transmit High level 2.4~5; TXD_POWER Signal Low level 0~0.4 Power Board Serial Port Receive High level 2.4~5; RXD_POWER Signal Low level 0~0.4 A7™ Service Manual 046-006272-00 1 - 69...

  • Page 84: Ventilator Control And Drive Board

    The monitor subsystem is composed of four boards: monitor signal detection board, valve drive board, ventilator sensor interface board, and VPM (auxiliary ventilator control board). 1 - 70 046-006272-00 A7™ Service Manual...
  • Page 85 Theory of Operation Ventilator Control and Drive 1.7.2.1 Monitor Signal Detection Board FIGURE 1-73 Monitor Signal Detection Board, Top View A7™ Service Manual 046-006272-00 1 - 71...
  • Page 86 Pressure Relief Valve Control Signal 5V Power Supply Ventilator Sensor Interface, J3 NAME FUNCTION I2C Data Signal I2C Clock Signal Thermal Mass Flow Sensor Temperature Signal Thermal Mass Flow Sensor Flow Signal Sensor Power Supply Ground 1 - 72 046-006272-00 A7™ Service Manual...
  • Page 87 Test Point Definition DESIGNATOR NAME FUNCTION RANGE (unit: V) O2 Concentration Voltage 0~3.5 PEEP Pressure 0.2~4.5 Airway Pressure 0.2~4.5 Ventilator Flow Detection 0.21~5.25 Expiratory Flow Value 0.2~5.5 VAJF3 Offset Voltage 0.602~0.622 10V5 10.5V 10.25~10.75 A7™ Service Manual 046-006272-00 1 - 73...
  • Page 88 0~12 SAN2 Signal of Three-way Valve 2 0~12 SAN3 Signal of Three-way Valve 3 0~12 SAN4 Signal of Three-way Valve 4 0~12 1.7.2.2 Valve Drive Board FIGURE 1-75 Valve Drive Board, Top View 1 - 74 046-006272-00 A7™ Service Manual...
  • Page 89 PEEP Valve Power Supply PEEP_VALVE PEEP Valve Control Signal Power Supply Interface, J2 NAME FUNCTION Ground Ground 12V Power Supply Status Monitor Detection Interface, J8 NAME FUNCTION Ground PNEUM_PRE_SW Circuit block pressure Switch Signal Ground Ground A7™ Service Manual 046-006272-00 1 - 75...
  • Page 90 Analog Channel Output Signal FLOW Inspiration Valve Control Signal PEEP PEEP Valve Control Signal 12V Input Signal 10~14 Valve Power Supply 6.65~7.35 SGND Ground 1.7.2.3 Sensor Interface Board FIGURE 1-77 Sensor Interface Board, Top View 1 - 76 046-006272-00 A7™ Service Manual...

  • Page 91: Battery

    Test Analog 5V Power Supply 1.7.3 Battery 1.7.3.1 Battery Power For A7 anesthesia system: Battery: 11.1V, 4.5Ah×2 Lithium-ion Battery (sealed) Battery Run Time: 90 minutes (new battery) Battery Charge Time: 8 hours max from an initial charge of 10%. A7™ Service Manual...
  • Page 92 Temperature Signal BAT- Battery- BAT- Battery- Battery Cable Interface, J3 NAME FUNCTION VBAT1 Battery Voltage NTC1 Battery Internal Thermistor Battery In-position Signal Ground VBAT2 Battery Voltage NTC2 Battery Internal Thermistor Battery In-position Signal Ground 1 - 78 046-006272-00 A7™ Service Manual...

  • Page 93: Infrared Communication Board

    Ventilator Control and Drive 1.7.4 Infrared Communication Board FIGURE 1-81 Infrared Communication Board, Top View FIGURE 1-82 Infrared Communication Board, Bottom View Power Supply Interface, J2 NAME FUNCTION 12V Power Supply 12V Power Supply Ground A7™ Service Manual 046-006272-00 1 - 79...

  • Page 94: Anesthesia Signal Interface Board

    Infrared Communication Board Serial Port Transmit Signal RXD_Infrared Comm Board Infrared Communication Board Serial Port Receive Signal Ground 1.7.5 Anesthesia Signal Interface Board FIGURE 1-83 Anesthesia Signal Interface Board, Top View FIGURE 1-84 Anesthesia Signal Interface Board, Bottom View 1 - 80 046-006272-00 A7™ Service Manual...

  • Page 95: Breathing System Heater

    The anesthesia system heater provides software and hardware dual-protection from overheating. The heater can switch over its operating mode automatically according to the change in ambient temperature. Electrical Flow Control System 1.8.1 EFCS Monitoring Board FIGURE 1-85 EFCS Monitoring Board, Top View A7™ Service Manual 046-006272-00 1 - 81...
  • Page 96 Backup Communication Between the FPGA and the CPU Board EFCS Monitoring Board Interface, J3 NAME FUNCTION VBB1 Solenoid Magnet Power Supply VBB1 Solenoid Magnet Power Supply Ground Ground STEP_VPP Stepper Motor Power Supply STEP_VPP Stepper Motor Power Supply 1 - 82 046-006272-00 A7™ Service Manual...
  • Page 97 Negative End of the Air Proportional Valve P_VALVE+ Proportional Valve Power Supply N2O_VALVE- Negative End of the Nitrous Oxide Proportional Valve EFCS Monitoring Board Interface, J8 NAME FUNCTION EE_SCL IIC Clock Signal C_DVCC Sensor Power Supply (range: 4.75V~5.25V) A7™ Service Manual 046-006272-00 1 - 83...
  • Page 98 Ground NEEDLE_SWITCH5_IN Needle Valve Position Switch 5 Ground NEEDLE_SWITCH6_IN Needle Valve Position Switch 6 Ground BFCS_SWITCH1_IN BFCS Position Switch 1 Ground BFCS_SWITCH2_IN BFCS Position Switch 2 Ground BFCS_SWITCH3_IN BFCS Position Switch 3 Ground 1 - 84 046-006272-00 A7™ Service Manual...

  • Page 99: Bfcs Position Board

    FIGURE 1-88 BFCS Position Board, Bottom View EFCS Monitoring Board Interface, J1 NAME FUNCTION BFCS_Switch1 BFCS Position Switch 1 Ground BFCS_Switch2 BFCS Position Switch 2 Ground BFCS_Switch3 BFCS Position Switch 3 Ground BFCS_Switch4 BFCS Position Switch 4 Ground A7™ Service Manual 046-006272-00 1 - 85...

  • Page 100: Total Flow Meter Backlight Board

    FIGURE 1-90 Total Flow Meter Backlight Board, Bottom View Total Flow Meter Backlight Board Interface, J1 NAME FUNCTION 5 V Power Supply Not Connected Internally Ground 1.8.4 Air Flow Sensor Interface Board FIGURE 1-91 Air Flow Sensor Interface Board, Top View 1 - 86 046-006272-00 A7™ Service Manual...
  • Page 101 Air Flow Sensor Interface Board Interface, J2 NAME FUNCTION 5 V Power Supply Not Connected internally 3.3 V Power Supply Ground Air_SCL Air Flow Sensor IIC Clock Signal Ground Air_SDA Air Flow Sensor IIC Data Signal Ground A7™ Service Manual 046-006272-00 1 - 87...

  • Page 102: Nitrous Oxide Flow Sensor Interface Board

    Nitrous Oxide Flow Sensor Interface Board Interface, J1 NAME FUNCTION 5 V Power Supply Ground 3.3 V Power Supply N2O_SCL N2O Flow Sensor IIC Clock Signal Ground N2O_SDA N2O Flow Sensor IIC Data Signal 1 - 88 046-006272-00 A7™ Service Manual...

  • Page 103: O2 Flow Sensor Interface Board

    Ground N2O_SDA N2O Flow Sensor IIC Data Signal Ground 1.8.6 O2 Flow Sensor Interface Board FIGURE 1-95 O2 Flow Sensor Interface Board, Top View FIGURE 1-96 O2 Flow Sensor Interface Board, Bottom View A7™ Service Manual 046-006272-00 1 - 89...
  • Page 104 O2 Flow Sensor Interface Board Interface, J2 NAME FUNCTION 5 V Power Supply Not Connected internally 3.3 V Power Supply Ground O2_SCL O2 Flow Sensor IIC Clock Signal Ground O2_SDA O2 Flow Sensor IIC Data Signal Ground 1 - 90 046-006272-00 A7™ Service Manual...

  • Page 105: Ventilator Pneumatic- O2 Drive Gas

    3 to 30 cmH2O by the valve drive board. 1.9.4 Tube Color Coding All the internal pneumatic tubes used in the anesthesia system are color coded per the United States standard. US STANDARD GREEN BLUE ORANGE A7™ Service Manual 046-006272-00 1 - 91...
  • Page 106 Ventilator Pneumatic- O2 Drive Gas Theory of Operation This page intentionally left blank. 1 - 92 046-006272-00 A7™ Service Manual...

  • Page 107: Installation Guide

    Functional Tests...................................... 2-20 Pneumatic Leak Tests..................................2-35 Breathing System Checks ................................. 2-38 Performance Verification................................... 2-43 Alarms and Fail safe Functions..............................2-48 Miscellaneous Tests....................................2-50 Vaporizer Interlock Test..................................2-51 Vaporizer Accuracy Test..................................2-52 Electrical Tests......................................2-53 A7™ Service Manual 046-006272-00 2 - 1...

  • Page 108: Preparation - Additional Material Required

    Dropdown hoses for ceiling-mounted medical gas utilities that are compatible with quick- disconnect hoses (if not purchased with the anesthesia system) • Negative pressure source, negative pressure source connection related hoses(if not purchased with the anesthesia system) 2 - 2 046-006272-00 A7™ Service Manual...

  • Page 109: Assembly

    2.2.1 Unpacking and Setup 1. When the A7 is delivered, IMMEDIATELY inspect the box for any damage. a. If there is NO damage and ALL tip indicators on the box exterior are intact, then sign and date the bill of lading or airway bill to indicate safe receipt of the anesthesia system.
  • Page 110 Assembly Installation Guide FIGURE 2-2 4. Pull the box straight up and over the unit. FIGURE 2-3 5. Remove the top foam piece on the A7. 2 - 4 046-006272-00 A7™ Service Manual...
  • Page 111 6. Cut the plastic tie wrap as shown below. Roll down the plastic bag from the unit. FIGURE 2-5 7. Using a pair of scissors, cut the plastic wrap from the A7 near the back of the unit.Take care to not scratch or otherwise damage the unit. Remove and discard the plastic wrap. Remove the empty box on the tray from the unit.
  • Page 112 9. After removing the plastic wrap and foam, check that there is one (FDA) box (or there are five (Canada) boxes) on the side of the unit, as shown below. Bellows housing packing box AG module packing box (Canada only) FIGURE 2-7 2 - 6 046-006272-00 A7™ Service Manual...
  • Page 113 10. At the base of the box platform, remove both sets of orange straps. FIGURE 2-9 11. Remove the piece of wood at the front of the A7. Then, remove the foam packing material from around the front of the unit.
  • Page 114 Check that there are green beads in the desiccant pack and that they have not turned pink. 14. Rotate the casters 90° and carefully roll the A7 unit down the ramp. Remove the bag from the unit. Save the bag in case repacking is needed.
  • Page 115 Installation Guide Assembly FIGURE 2-13 16. Install the Breathing Assembly on the side of the A7. Align the Assembly carefully, and then push it firmly towards the A7 until the Assembly clicks into place. FIGURE 2-14 17. Carefully open the small box that contains the Bellows Assembly and Bellows Dome. Remove the plastic bags from the Assembly.
  • Page 116 (the gradation markings on the bellows dome should face front and be visible to the operator). FIGURE 2-16 20. Install the Bag Arm Assembly, aligning the keyed features as shown below. 2 - 10 046-006272-00 A7™ Service Manual...
  • Page 117 Install the Paw gauge and the water trap on the breathing system. FIGURE 2-18 22. Open the middle and bottom drawers and carefully remove the Removable Absorber Assembly, Waste Gas Scavenger Hose and the Waste Gas Scavenger Assembly. A7™ Service Manual 046-006272-00 2 - 11...
  • Page 118 Assembly Installation Guide FIGURE 2-19 2 - 12 046-006272-00 A7™ Service Manual...
  • Page 119 FIGURE 2-20 24. Add CO2 absorbent Pre-Pak or loose fill to the canister. Slide the canister into the Absorber Assembly. Turn the locking lever 90° counter-clockwise to lock the canister in place. FIGURE 2-21 A7™ Service Manual 046-006272-00 2 - 13...
  • Page 120 27. Slide the Scavenger Assembly in the track on the lower left side (i.e., same side as the Breathing Assembly) of the A7 and tighten the thumbscrew on the Scavenger Assembly to lock it in place. Install one side of the Scavenger Hose to the Scavenger Assembly and the other side of the Hose to the A7 as shown below.
  • Page 121 Drawer Keys(PN: 034-000353-00) • AGSS 3 ways connector assembly (PN: 115-026796-00) • Suction filter (PN: 082-001327-00) • Negative pressure suction tube (including filters) (PN: 115-033264-00) • A Series Cleaning Quick Reference Card (PN: 046-009638-00) A7™ Service Manual 046-006272-00 2 - 15...
  • Page 122 37. Connect the hose from the gas scavenger to the operating room's EVAC connector. At the AGSS tank, turn the knob on top of the scavenger until the float is between the Min and Max markings. 2 - 16 046-006272-00 A7™ Service Manual...
  • Page 123 43. Hang the Pre-operative Checkout List (P/N: 046-002590-00) and the Auxiliary O2/AIR Reference Card (P/N: 046-002591-00) to the handle of the A7 unit. 44. Mount the tank wrench on the rear of the A7 so that it can be used to open or close each cylinder without disconnecting it from the machine.

  • Page 124: Breathing System And Breathing System Accessories And Checkout Procedures

    2.2.3 Vaporizers (if available) WARNING: If the vaporizer is incompatible with the A7 Anesthesia System, the vaporizer will not work at all. Use vaporizers with Selectatec mounting system that are compliant to ISO 8835-4. Refer to the vaporizer manufacturer's Instructions For Use for filling or draining the vaporizer and other information.

  • Page 125: Monitoring Products Mounting And Electrical Connection (If Available)

    Use of other monitors and mounting hardware is the responsibility of the installer. 2. After mounting a monitor to the A7, connect it to one of the AC outlets located on the rear of the A7. 3. Turn on each monitor one at a time. Verify that the circuit breaker holds without tripping.

  • Page 126: Functional Tests

    Refer to Chapter 4.0 Calibration if any values are out of specification. NOTE: The A7 system must be powered on (AC power, not battery) and the Breathing System Warmer set to ON at least an hour before performing the Ventilation Tests described in “VCV Adult Ventilation Mode Test” on page 2-44.
  • Page 127 Both automatic ventilation and manual ventilation can still be applied Compliance test failed using the previous compliance value in the A7 system memory, but may not meet the accuracy of the delivered volume. The following screen is displayed if the safety valve control test is failed. You can select Service Access and enter the required service password to access service mode.
  • Page 128 The following screen is displayed if the automatic circuit leak test is failed and the leak >1000 mL. You can select Manual Only to enter Standby mode. But mechanical ventilation is disabled. You can select Retry to perform automatic circuit leak test again. 2 - 22 046-006272-00 A7™ Service Manual...
  • Page 129 Standby mode.You can select Retry to perform automatic circuit leak test again. FIGURE 2-33 Compliance Test: Fail The following screen is displayed if the automatic circuit leak test is completed. Select Continue to enter Standby mode. A7™ Service Manual 046-006272-00 2 - 23...
  • Page 130 To perform the breathing system leak test in manual ventilation mode: 1. You can access the manual circuit leak test screen after the automatic circuit leak test has passed. The manual circuit leak test screen is shown below. 2 - 24 046-006272-00 A7™ Service Manual...
  • Page 131 3. The ongoing manual circuit leak test is as shown below. You can select Cancel to cancel the ongoing leak test. FIGURE 2-36 Manual Circuit Leak Test In Progress The following screen is displayed if the manual circuit leak test is failed. If so, you must perform the test again. A7™ Service Manual 046-006272-00 2 - 25...
  • Page 132 If there is a leak, check the pneumatic circuit system for leakage and troubleshoot the problems as described in 5.3 Pneumatic Circuit System Problems. Repeat the leak test after the source of the failure has been resolved. 2 - 26 046-006272-00 A7™ Service Manual...

  • Page 133: Automatic Backup Flow Control Test

    Solenoid Actuator, Stepper Motor, Position Sensor, and 3-Way Valve. To Perform an Automatic Backup Flow Control Test: 1. While powering on the A7, the system calculates the time between the last successful Automatic Backup Flow Control Test time and current time. If the difference between the two is...
  • Page 134 FIGURE 2-40 Automatic Backup Flow Control Test In Progress The following screen is displayed if the automatic backup flow control test is failed. If so, you can select Retry to repeat the test or accept the result to enter Standby mode. 2 - 28 046-006272-00 A7™ Service Manual...
  • Page 135 The BFCS fails to deploy check if the BFCS is stuck. during automatic backup 1. Re-start the machine. flow control test. The solenoid of BFCS is faulty 2. Replace the parts of backup flow control system. A7™ Service Manual 046-006272-00 2 - 29...

  • Page 136: Display Setup Check

    2.3.3 Display Setup Check Touch Continue to advance to the Standby screen display. For the A7, check that the screen displays the main screen, check that all ventilation modes are there, as shown in the figure below. FIGURE 2-43 Display Setup Check, A7 2.3.4...
  • Page 137 When calibrating the internal AG module, open the back cover of the machine, disconnect the tubing as shown below and connect the calibration gas to the gas inlet. Disconnect the tubing here Gas inlet FIGURE 2-45 A7™ Service Manual 046-006272-00 2 - 31...

  • Page 138: Gas Module Verification

    2. Set the flow to minimum (0.20 L/min). Connect a flow meter to the ACGO port. 3. Verify that the O2 flush flow is between 35 to 50 L/min when pressing the O2 flush button. 2 - 32 046-006272-00 A7™ Service Manual...
  • Page 139 2. Set the APL valve to the SP position. 3. Connect one end of the breathing circuit to the bag arm, one end to the inspiratory port and the Y-piece to the test port: A7™ Service Manual 046-006272-00 2 - 33...
  • Page 140 5. Press the FLUSH button until the pressure on the airway pressure gauge reaches 35 cmH2O. 6. Set the APL valve to SP. 7. Verify that the pressure does not drop below 30 cmH2O after 10 seconds. 2 - 34 046-006272-00 A7™ Service Manual...

  • Page 141: Pneumatic Leak Tests

    2.4.2 N2O Cylinder Leak Test 1. Remove the N2O line pressure hose from the line pressure inlet on the A7. 2. Mount a full N2O cylinder to the rear panel yoke. If necessary, place a new clean tank washer between the cylinder and the yoke to minimize any leaks at the yoke connection.

  • Page 142: Air Cylinder Leak Test

    12. Remove the plug from the back pressure regulator and reconnect hose #26. 13. Close the O2 and AIR needle valves. 14. Reconnect the O2 and AIR line pressure hoses and remove the pinch in the hose. 15. Disable the BFCS. 2 - 36 046-006272-00 A7™ Service Manual...
  • Page 143 3. Disconnect the hose #123 from the 3 way valve assembly and plug the connector on the 3 way valve assembly. 4. Turn the unit on and set the A7 in EFCS mode. 5. Enter SERVICE / FCS TESTS: •...

  • Page 144: Breathing System Checks

    2. Connect only the O2 line pressure hose to the anesthesia system from the wall supply. Leave all other line pressure hoses disconnected. 3. Turn the unit on and set the A7 in BFCS mode, Rotate the O2 needle valve knob to ensure a continuous flow increase throughout its full range. Set the O2 flow to 2L/min.
  • Page 145 17. Set the O2 flow to 5 L/min and the N2O flow to 5 L/min. 18. Verify the that the O2 and N2O concentrations reads between 47% and 53% after 1 minute. 19. Set the system to the STANDBY mode by pressing the End Case button. A7™ Service Manual 046-006272-00 2 - 39...
  • Page 146 7. Set the balance gas to NONE. 8. Rotate the O2 flow control knob to set the O2 flow following the table below, then verify the oxygen flow reading of the flow analyzer. 2 - 40 046-006272-00 A7™ Service Manual...
  • Page 147 Set the air flow to 10 L/min. Verify air flow is between 9500 mL/min and 10500 mL/min. Set the air flow to 15 L/min. Verify air flow is between 14250 mL/min and 15750 mL/min. A7™ Service Manual 046-006272-00 2 - 41...

  • Page 148: Drive Gas Pressure Loss Alarm, N2O Cutoff Test

    2. Connect the O2 and N2O line pressure hose to the anesthesia system from the wall supply. Leave all other line pressure hoses disconnected. 3. Turn the unit on and set the A7 in EFCS mode and set the N2O as balance gas. 4. Set the O2 flow to 2 L/min using the flow control valve.

  • Page 149: Performance Verification

    • An alarm tone sounds. 2.6.3 Alarm Silence Test 1. While the APNEA alarm is sounding, press the Silence soft key. 2. Verify the audio portion of the alarm stops and resumes after 2 minutes. A7™ Service Manual 046-006272-00 2 - 43...

  • Page 150: Vcv Adult Ventilation Mode Test 2

    1. Set the O2 flow to 10 L/min and set the N2O and Air flow rates to 0 flow. 2. Set the mechanical Auto/Manual switch to AUTO. 3. Set the ventilator controls to: 2 - 44 046-006272-00 A7™ Service Manual...

  • Page 151: Vcv Child Ventilation Mode Test

    5. Verify the delivered volume as measured by a Vent Tester at the expiratory port, is within 15ml of the set value within approximately 1 minute from the start of ventilation. A7™ Service Manual 046-006272-00 2 - 45...

  • Page 152: Airway Disconnect Alarm Test

    5. Verify that the pressure waveform, Tidal Volume, Resp. Rate and minute volume values appear on the screen. 6. Verify that the PEAK Value measured with the Vent Tester reaches 15 ±2.5 cmH2O within five breaths from the start of ventilation. 2 - 46 046-006272-00 A7™ Service Manual...

  • Page 153: Pressure Support (Ps) Ventilation Mode Test

    P + PEEP. 7. Stop triggering breaths. 8. Verify that after 15 seconds the ventilator delivers a breath and displays the message Apnea Ventilation. 9. Verify the system ventilates with a frequency of 4 bpm. A7™ Service Manual 046-006272-00 2 - 47...

  • Page 154: Alarms And Fail Safe Functions

    • FiO2 Too High message appears on the screen. • An alarm tone sounds. 5. Set the high Insp O2 alarm limit to the highest setting. 6. Verify the FiO2 Too High message disappears. 2 - 48 046-006272-00 A7™ Service Manual...

  • Page 155: Peak Pressure Alarms Test

    8. Verify that the MV Too High message disappears. 9. Set the mechanical Auto/Manual switch to MANUAL. 10. Set all fresh gas flows to 0. 11. Press End Case button to enter the standby mode. A7™ Service Manual 046-006272-00 2 - 49...

  • Page 156: Miscellaneous Tests

    CO2 waveform and parameter area disappear and that the prompt message External AG Unloaded Successfully is displayed at the top of the screen. 6. Select “End Case” to return to Standby mode. 2 - 50 046-006272-00 A7™ Service Manual...

  • Page 157: Vaporizer Interlock Test

    15. Set both vaporizer dials to 0. 16. Rotate both vaporizer dials to T and remove all vaporizers. 17. Verify that the locking spring is intact. 18. Reconnect all vaporizers to the Vaporizer Mounting Manifold. A7™ Service Manual 046-006272-00 2 - 51...

  • Page 158: Vaporizer Accuracy Test

    7. Then turn on the suction regulator knob in counterclockwise direction. 8. Verify the pressure on the suction gauge gradully increase and comes to the pressure that was obtained in full mode. 2 - 52 046-006272-00 A7™ Service Manual...

  • Page 159: Electrical Tests

    (UL, CSA, or AAMI etc.). Follow the instructions of the analyzer manufacturer. 2.12.3 Electrical Safety Inspection Form Location: Technician: Equipment: Control Number: Manufacturer: Model: Measurement equipment /SN: Date of Calibration: INSPECTION AND TESTING Pass/Fail Limit Auxiliary mains socket outlets TABLE 2-1 A7™ Service Manual 046-006272-00 2 - 53...
  • Page 160 When neither power supply PCBA, transformer nor patient electrically-connected PCBA is repaired or Test items: 1, 2 replaced When power supply PCBA or transformer is Test items: 1, 2, 3 repaired or replaced TABLE 2-2 2 - 54 046-006272-00 A7™ Service Manual...

  • Page 161: Periodic Maintenance

    Battery Maintenance and Replacement.............................3-8 Functional Tests......................................3-8 Pneumatic Leak Tests..................................3-33 Breathing System Checks ................................. 3-37 Performance Verification................................... 3-41 Alarms and Fail safe Functions..............................3-44 Vaporizer Interlock Test..................................3-48 Vaporizer Accuracy Test..................................3-49 Electrical Tests......................................3-50 A7™ Service Manual 046-006272-00 3 - 1...

  • Page 162: Maintenance Schedule

    Periodic Maintenance Maintenance Schedule The following is a list of activities required for periodic maintenance of the A7 Anesthesia System. Physical inspection, replacement of consumables, and performance checks should be periodically performed per the schedule listed below. The manufacturer is not responsible for component failure or loss resulting from the use of stated consumables beyond their recommended replacement interval.

  • Page 163: Checklist Before Surgery

    1. Check if the measurement made by the AG module is After each Check the normal. service or at AG module 2. Check the effectiveness of AG module calibration the time of return accuracy result. visit A7™ Service Manual 046-006272-00 3 - 3...

  • Page 164: Visual Inspection Checklist

    O-ring 23.47X2.95 (for Water Replace Replace 082-001504-00 Collection Cup) CO2 Absorber Hose Check Replace 049-000146-00 Gasket, absorber canister exterior Check Replace 049-000143-00 Gasket, absorber canister interior Check Replace 049-000145-00 Gasket, CO2 bypass assembly Check Replace 049-000142-00 3 - 4 046-006272-00 A7™ Service Manual...
  • Page 165 Filter.0.45um (used for built-in AG Replace Replace 082-000423-00 module) Dust filter Check Replace 045-000241-00 O-ring 18X2.5 (for rotating block of Check Replace 082-001502-00 breathing circuit) O-ring, 0.35X1.78 FKM A70 Check Check 082-000676-00 Touch screen Check Replace 801-0631-00014-00 A7™ Service Manual 046-006272-00 3 - 5...
  • Page 166 List of Periodic Maintenance Parts to be Replaced and Checked Periodic Maintenance The locations of the O-rings / Gaskets are shown in FIGURE 3-1. FIGURE 3-1 Locations of the O-rings / gaskets FIGURE 3-2 Breathing System 3 - 6 046-006272-00 A7™ Service Manual...
  • Page 167 Periodic Maintenance List of Periodic Maintenance Parts to be Replaced and Checked FIGURE 3-3 Breathing System Adapter FIGURE 3-4 CO2 Bypass Shaft and CO2 Absorber Assembly A7™ Service Manual 046-006272-00 3 - 7...

  • Page 168: Battery Maintenance And Replacement

    FIGURE 3-5 Internal AG module FIGURE 3-6 Dust Filter Battery Maintenance and Replacement Maintenance is required for the lithium-ion battery supply in the A7. Replace it every 3 years as follows: 1. Open the rear cover of the anesthesia system.

  • Page 169: Breathing System Leak Test

    Periodic Maintenance Functional Tests NOTE: The A7 system must be powered on (AC power, not battery) and the Breathing System Warmer set to ON at least an hour before performing the Ventilation Tests described in “VCV Adult Ventilation Mode Test” on page 2-44.
  • Page 170 Leak >1000 mL Both automatic ventilation and manual ventilation can still be Compliance test failed applied using the previous compliance value in the A7 system memory, but may not meet the accuracy of the delivered volume. 3 - 10 046-006272-00...
  • Page 171 The following screen is displayed if the safety valve control test is failed. You can select Service Access and enter the required service password to access service mode. You can select Retry to perform automatic circuit leak test again. FIGURE 3-9 Machine Non-Functional Screen A7™ Service Manual 046-006272-00 3 - 11...
  • Page 172 Manual Only to enter Standby mode. But mechanical ventilation is disabled. You can select Retry to perform automatic circuit leak test again. FIGURE 3-11 Automatic Circuit Leak and Compliance Test: Fail 3 - 12 046-006272-00 A7™ Service Manual...
  • Page 173 To perform the breathing system leak test in manual ventilation mode: 1. You can access the manual circuit leak test screen after the automatic circuit leak test has passed. The manual circuit leak test screen is shown below A7™ Service Manual 046-006272-00 3 - 13...
  • Page 174 3. The ongoing manual circuit leak test is as shown below. You can select Cancel to cancel the ongoing leak test. FIGURE 3-15 Manual Circuit Leak Test In Progress 3 - 14 046-006272-00 A7™ Service Manual...
  • Page 175 System Problems. Repeat the leak test after the source of the failure has been resolved. 3.8.1.3 Troubleshooting: Leak Test The following table lists the commonly-encountered problems and recommended actions for Section 3.8.1.2 Breathing System Leak Test in Manual Ventilation Mode. A7™ Service Manual 046-006272-00 3 - 15...

  • Page 176: Automatic Backup Flow Control Test

    Solenoid Actuator, Stepper Motor, Position Sensor, and 3-Way Valve. To Perform an Automatic Backup Flow Control Test: 1. While powering on the A7, the system calculates the time between the last successful Automatic Backup Flow Control Test time and current time. If the difference between the two is...
  • Page 177 2. The ongoing Automatic Backup Flow Control Test is as shown below. You can select Cancel to cancel the ongoing test. FIGURE 3-19 Automatic Backup Flow Control Test In Progress A7™ Service Manual 046-006272-00 3 - 17...
  • Page 178 The BFCS fails to deploy check if the BFCS is stuck. during automatic backup 1. Re-start the machine. flow control test. The solenoid of BFCS is faulty 2. Replace the parts of backup flow control system. 3 - 18 046-006272-00 A7™ Service Manual...
  • Page 179 The three-way valve is BFCS limb during BFCS automatic test, the connection and supply gas faulty. measured flow of total flow meter is less pressure are normal. than 0.2L/min. 2. Replace the three-way valve. A7™ Service Manual 046-006272-00 3 - 19...

  • Page 180: Check The Ag Module Accuracy

    When checking the internal AG module, open the back cover of the machine, disconnect the tubing as shown below and connect the standard gas to the gas inlet Disconnect the tubing here Gas inlet FIGURE 3-23 3 - 20 046-006272-00 A7™ Service Manual...

  • Page 181: Gas Module Verification

    2. Set the flow to minimum (0.20 L/min). Connect a flow meter to the ACGO port. 3. Verify that the O2 flush flow is between 35 to 50 L/min when pressing the O2 flush button. A7™ Service Manual 046-006272-00 3 - 21...
  • Page 182 Verify O2 concentration is between 24.7% and 27.3% Set the total flow to 5L/min Set the O2 Concentration to 100%. Verify O2 concentration is 95% or greater Set the total flow to 5L/min 3 - 22 046-006272-00 A7™ Service Manual...
  • Page 183 5. Press the FLUSH button until the pressure on the airway pressure gauge reaches 35 cmH2O. 6. Set the APL valve to SP. 7. Verify that the pressure does not drop below 30 cmH2O after 10 seconds A7™ Service Manual 046-006272-00 3 - 23...

  • Page 184: Check The Sensor Zero Point

    4. The second column is the current reading of the sensors and the third column is the zero that is saved in the EEPROM. The following table lists the normal range of the zero point of the A7 pressure and flow sensors. Sensor Name...

  • Page 185: Check The Flow Sensor Accuracy

    Setup the calibration device as described below: b. Flow Setting: Press the Flow button on the front control panel of the calibration. You can set Range to High Flow or Low Flow as required. A7™ Service Manual 046-006272-00 3 - 25...
  • Page 186 Gas Settings: Press the Setup button, select Setting->ENTER->Gas Settings->MODIFY->Gas Type->O2. d. Correction mode: Press the Setup button, select Setting->ENTER->Correction Mode- >MODIFY->Correction Mode->ATP.. FIGURE 3-29 Calibration Front Control Panel - Gas Settings e. Select BACK->BACK-> BACK. 3 - 26 046-006272-00 A7™ Service Manual...
  • Page 187 FIGURE 3-31 TSI Certifier 4070 Menu c. Gas Settings: Press the GAS SELECT key until the bottom left corner reads O2When the system is in Standby. 6. Select the Setup-> Service-> Diagnostic Tests->Valves to access the following menu. A7™ Service Manual 046-006272-00 3 - 27...

  • Page 188: Check The Pressure Sensor Accuracy

    You can use any pressure meter that has an accuracy of at least ±2% for the accuracy measurement of the pressure sensors. To check the measurement accuracy of pressure sensors: 1. Perform pneumatic connections as follows: The following pictures show the four-way device: 3 - 28 046-006272-00 A7™ Service Manual...
  • Page 189 3. Connect the four way tube to the pressure sensor P1 of monitor board, pressure sensor P2 of PEEP, the tube marked as #72, and the low pressure port of Fluke VT-Plus. The tube marked as #9 will remain unconnected for this calibration. FIGURE 3-34 Pneumatic Connections to Monitor Board A7™ Service Manual 046-006272-00 3 - 29...
  • Page 190 2. Set up the calibration device as described below. To set the Fluke VT-Plus: a. Pressure Setting: Press the PRESSURE button on the front control panel of the calibration, select Range and then set it to Low Press. 3 - 30 046-006272-00 A7™ Service Manual...
  • Page 191 FIGURE 3-37 Calibration Front Control Panel - Pressure Button b. Gas Settings: Press the Setup button, select Setting->ENTER->Gas Settings->MODIFY->Gas Type->O2. FIGURE 3-38 Calibration Front Control Panel - Gas Settings c. Select BACK->BACK-> BACK. A7™ Service Manual 046-006272-00 3 - 31...
  • Page 192 1 cmH2O or 2% of the measured value of the calibration device, whichever is greater. Otherwise, refer to Section 4.3.3 Pressure Calibration (Service) to perform pressure calibration again. 3 - 32 046-006272-00 A7™ Service Manual...

  • Page 193: Total Flow Sensor Self Test

    5 psi of each other. 13. Disconnect the N2O Pipeline supply and reconnect hose # 35 to the regulator assembly. 14. Reconnect the pipe supply for all 3 gases (O2, AIR and N2O). A7™ Service Manual 046-006272-00 3 - 33...

  • Page 194: N2O Cylinder Leak Test

    3.9.2 N2O Cylinder Leak Test 1. Remove the N2O line pressure hose from the line pressure inlet on the A7. 2. Mount a full N2O cylinder to the rear panel yoke. If necessary, place a new clean tank washer between the cylinder and the yoke to minimize any leaks at the yoke connection.

  • Page 195: Line Pressure Leak Tests

    12. Remove the plug from the back pressure regulator and reconnect hose #26. 13. Close the O2 and AIR needle valves. 14. Reconnect the O2 and AIR line pressure hoses and remove the pinch in the hose. 15. Disable the BFCS. A7™ Service Manual 046-006272-00 3 - 35...
  • Page 196 3. Disconnect the hose #123 from the 3 way valve assembly and plug the connector on the 3 way valve assembly. 4. Turn the unit on and set the A7 in EFCS mode. 5. Enter SERVICE / FCS TESTS: •...

  • Page 197: Breathing System Checks

    2. Connect only the O2 line pressure hose to the anesthesia system from the wall supply. Leave all other line pressure hoses disconnected. 3. Turn the unit on and set the A7 in BFCS mode, Rotate the O2 needle valve knob to ensure a continuous flow increase throughout its full range. Set the O2 flow to 2L/min.
  • Page 198 17. Set the O2 flow to 5 L/min and the N2O flow to 5 L/min. 18. Verify the that the O2 and N2O concentrations reads between 47% and 53% after 1 minute. 19. Set the system to the STANDBY mode by pressing the End Case button. 3 - 38 046-006272-00 A7™ Service Manual...
  • Page 199 8. Set the balance gas to NONE. 9. Rotate the O2 flow control knob to set the O2 flow following the table below, then verify the oxygen flow reading of the flow analyzer. A7™ Service Manual 046-006272-00 3 - 39...

  • Page 200: Drive Gas Pressure Loss Alarm, N2O Cutoff Test

    2. Connect the O2 and N2O line pressure hose to the anesthesia system from the wall supply. Leave all other line pressure hoses disconnected. 3. Turn the unit on and set the A7 in EFCS mode and set the N2O as balance gas. 4. Set the O2 flow to 2 L/min using the flow control valve.

  • Page 201: Performance Verification

    An alarm tone sounds. 3.11.3 Alarm Silence Test 1. While the APNEA alarm is sounding, press the Silence soft key. 2. Verify the audio portion of the alarm stops and resumes after 2 minutes. A7™ Service Manual 046-006272-00 3 - 41...

  • Page 202: Vcv Adult Ventilation Mode Test

    4. Verify the delivered volume, as measured by a Vent Tester at the expiratory port, is within 15ml of the set value within approximately 1 minute from the start of ventilation. 3 - 42 046-006272-00 A7™ Service Manual...

  • Page 203: Airway Disconnect Alarm Test

    5. Verify that the pressure waveform, Tidal Volume, Resp. Rate and minute volume values appear on the screen. 6. Verify that the PEAK Value reaches 15 ±2.5 cmH2O within five breaths from the start of ventilation. A7™ Service Manual 046-006272-00 3 - 43...

  • Page 204: Pressure Support (Ps) Ventilation Mode Test

    0 L/min. 2. Set the ventilator controls to: Ventilator Controls Ventilator Settings Ventilation Mode Rate Tpause PEEP Plimit 3. Press Set Mode button to begin ventilation. 3 - 44 046-006272-00 A7™ Service Manual...

  • Page 205: Low O2 Alarm Test

    Paw Too Low message appears on the screen. b. An alarm tone sounds. 8. Set the PEAK low alarm limit to the lowest setting. 9. Verify the Paw Too Low message disappears. A7™ Service Manual 046-006272-00 3 - 45...

  • Page 206: Minute Volume Alarm Test

    8. Verify that the MV Too High message disappears. 9. Set the mechanical Auto/Manual switch to MANUAL. 10. Set all fresh gas flows to 0. 11. Press End Case button to enter the standby mode. 3 - 46 046-006272-00 A7™ Service Manual...

  • Page 207: Miscellaneous Tests

    CO2 waveform and parameter area disappear and that the prompt message External AG Unloaded Successfully is displayed at the top of the screen. 6. Select “End Case” to return to Standby mode. A7™ Service Manual 046-006272-00 3 - 47...

  • Page 208: Vaporizer Interlock Test

    15. Set both vaporizer dials to 0. 16. Rotate both vaporizer dials to T and remove all vaporizers. 17. Verify that the locking spring is intact. 18. Reconnect all vaporizers to the Vaporizer Mounting Manifold. 3 - 48 046-006272-00 A7™ Service Manual...

  • Page 209: Vaporizer Accuracy Test

    7. Then turn on the suction regulator knob in counterclockwise direction. 8. Verify the pressure on the suction gauge gradully increase and comes to the pressure that was obtained in full mode. A7™ Service Manual 046-006272-00 3 - 49...

  • Page 210: Electrical Tests

    While for the last two tests, verify that the maximum leakage current does not exceed 1000 μA (1 mA). NOTE: Make sure the safety analyzer is authorized by certificate organizations (UL, CSA, or AAMI etc.). Follow the instructions of the analyzer manufacturer. 3 - 50 046-006272-00 A7™ Service Manual...

  • Page 211: Electrical Safety Inspection Form

    When neither power supply PCBA, transformer nor patient electrically-connected PCBA is repaired or Test items: 1, 2 replaced When power supply PCBA or transformer is Test items: 1, 2, 3 repaired or replaced TABLE 3-2 A7™ Service Manual 046-006272-00 3 - 51...
  • Page 212 Electrical Tests Periodic Maintenance This page intentionally left blank. 3 - 52 046-006272-00 A7™ Service Manual...

  • Page 213: Calibration

    Calibration Introduction .........................................4-2 Calibration Warnings, Precautions, and Notes........................4-2 System Calibration ....................................4-3 A7™ Service Manual 046-006272-00 4 - 1...

  • Page 214: Introduction

    Calibration Introduction This section provides detailed information required to properly test and calibrate the A7 anesthesia system. Calibration consists of making mechanical and electrical adjustments with the proper test equipment. The instrument should be tested and calibrated after repairs have been completed or at regular intervals as part of a periodic maintenance procedure.

  • Page 215: Notes

    NOTE: You can select VT Plus to perform automatic calibration of pressure sensors or flow sensors, or any other calibration devices that fulfills the accuracy requirements to perform manual calibration. A7™ Service Manual 046-006272-00 4 - 3...

  • Page 216: Flow Calibration (User)

    NOTE: During calibration, make sure that the drive gas pressure is kept within specifications. Failure to do so may lead to calibration failure. 4 - 4 046-006272-00 A7™ Service Manual...
  • Page 217 Follow these steps to calibrate flow sensors. 1. Enter Standby. 2. Select Setup-> General-> Calibrate Flow Sensor to access the screen shown below. FIGURE 4-1 A7™ Service Manual 046-006272-00 4 - 5...
  • Page 218 4. Select Begin to calibrate flow sensors. During the calibration, you can select Cancel to cancel the calibration. FIGURE 4-3 5. The screen shown below is displayed if the ongoing calibration is canceled. Select Try Again to do the calibration again. Select Done to exit the calibration screen. 4 - 6 046-006272-00 A7™ Service Manual...
  • Page 219 Select Done to exit the calibration screen. FIGURE 4-5 7. The screen shown below is displayed after a successful flow sensor calibration. Select Done to exit the calibration screen. FIGURE 4-6 A7™ Service Manual 046-006272-00 4 - 7...

  • Page 220: Flow Calibration (Service)

    Set the machine to work in EFCS mode for flow calibration. 4.3.2.2 Auto Calibration Follow these steps to calibrate flow sensors. 1. Enter Standby. 2. Select Setup-> Service-> Calibration-> Flow Sensors to access the screen as shown. 4 - 8 046-006272-00 A7™ Service Manual...
  • Page 221 3. Select Calibrate Automatically button to open the menu shown below. Then select the desired calibration device. FIGURE 4-8 4. Connect the calibration device with the anesthesia machine using a communication cable (P/N: 801-0631-00121-00). A7™ Service Manual 046-006272-00 4 - 9...
  • Page 222 FIGURE 4-10 Cable connections at the calibration device (VT Plus) end 5. Set up the calibration device as described below. To set the VT-Plus: a. Gas Settings: Press the Setup button, select Setting->ENTER->Gas Settings->MODIFY->Gas Type->O2->BACK->BACK. 4 - 10 046-006272-00 A7™ Service Manual...
  • Page 223 FIGURE 4-12 c. Serial Mode Settings: Press the Setup button, select Setting->System->Enter->Serial Mode - >OTIS Ctrl->BACK->BACK. FIGURE 4-13 d. After setting up the calibration device, the calibration enters the serial mode screen shown below. A7™ Service Manual 046-006272-00 4 - 11...
  • Page 224 System Calibration Calibration FIGURE 4-14 6. Press the Next button to open the menu shown below. 4 - 12 046-006272-00 A7™ Service Manual...
  • Page 225 Calibration System Calibration FIGURE 4-15 7. Connect the inspiration port and expiration port of the anesthesia machine following the on- screen instructions, shown below. FIGURE 4-16 A7™ Service Manual 046-006272-00 4 - 13...
  • Page 226 9. The menu shown below is displayed after the above steps are completed. FIGURE 4-18 10. Connect the pneumatic circuit of calibration device with that of anesthesia machine following the on-screen instructions. Connect the low flow channel of the calibration device first, shown below. 4 - 14 046-006272-00 A7™ Service Manual...
  • Page 227 FIGURE 4-19 Pneumatic connection with the calibration device (VT Plus) 11. Press the Continue button to open the menu shown below. FIGURE 4-20 12. The menu shown below is displayed after the low flow channel calibration is completed. A7™ Service Manual 046-006272-00 4 - 15...
  • Page 228 13. Connect the high flow channel of the calibration device following the on-screen instructions shown below. FIGURE 4-22 Pneumatic connection with the calibration device (VT Plus) 14. Press the Continue button to open the menu shown below. 4 - 16 046-006272-00 A7™ Service Manual...
  • Page 229 Select Try Again to do the calibration again. Select Done to exit the calibration screen. FIGURE 4-24 • The screen shown below is displayed after a successful flow sensor calibration. Select Done to exit the calibration screen. A7™ Service Manual 046-006272-00 4 - 17...
  • Page 230 Calibration FIGURE 4-25 16. The screen shown below is displayed if the ongoing calibration is canceled. Select Try Again to do the calibration again. Select Done to exit the calibration screen. FIGURE 4-26 4 - 18 046-006272-00 A7™ Service Manual...
  • Page 231 Follow these steps to calibrate the flow sensors. 1. Enter Standby. 2. Select Setup-> Service-> Calibration-> Flow Sensors to access the screen as shown. FIGURE 4-27 3. Select Calibrate Manually button to open the menu shown below. A7™ Service Manual 046-006272-00 4 - 19...
  • Page 232 4. Connect the inspiration port and expiration port of the anesthesia machine following the on- screen instruction as shown below. FIGURE 4-29 5. Press the Begin button to open the menu shown below. 4 - 20 046-006272-00 A7™ Service Manual...
  • Page 233 Flow Setting: Press the to line select key until the top display reads LPM or SLPM. If the display reads SLPM, press the DISPLAY UNITS key until the top display reads LPM. b. Gas Settings: Press the GAS SELECT key until the bottom left corner reads O2. A7™ Service Manual 046-006272-00 4 - 21...
  • Page 234 During the calibration, you can select to re-calibrate any calibration point. After having inputted the standard flow values of all the 32 calibration points, select Accept to check and save the calibration data. 4 - 22 046-006272-00 A7™ Service Manual...
  • Page 235 11.Press the Accept button and the screen shown below is displayed. • The screen shown below is displayed after a successful flow sensor calibration. FIGURE 4-35 • The screen shown below is displayed if the flow sensor calibration has failed. A7™ Service Manual 046-006272-00 4 - 23...
  • Page 236 After flow calibration, check the accuracy of flow sensors by referring to Section 3.8.7 Check the Flow Sensor Accuracy. NOTE: In case of calibration failure, first fix the problem and then perform flow calibration again. 4 - 24 046-006272-00 A7™ Service Manual...
  • Page 237 1. Check if the operations are [00 00 00 04] is The Auto/Manual switch is on Manual performed as directed. displayed. position. 2. If so, check the Auto/Manual switch. A7™ Service Manual 046-006272-00 4 - 25...
  • Page 238 2000, or is less than 0) gas supply (the change is not more than 1% of the reading), indicating that the then valve is indeed fully closed. 3. Replace the board. 4 - 26 046-006272-00 A7™ Service Manual...
  • Page 239 (less than 90) 90 L/min is greater than 3900, the measurement range of expiratory flow sensor has an error. In this case, replace the expiratory flow sensor. 3. Replace the board. A7™ Service Manual 046-006272-00 4 - 27...
  • Page 240 [00 00 10 00] is Resolution error occurs to the inspiratory calibration device. displayed. flow sensor. 4. See section 5.4 (pg. 5-71) "Sensors and Valves Problems". 5. Replace the inspiratory flow sensor. 6. Replace the board. 4 - 28 046-006272-00 A7™ Service Manual...
  • Page 241 The system fails to write EEPROM. displayed. 2. Replace the monitoring board. 1. Check if ACGO is positioned to [00 10 00 00] is "OFF". ACGO switch is on "ON" position. displayed. 2. Check the ACGO identification switch. A7™ Service Manual 046-006272-00 4 - 29...

  • Page 242: Pressure Calibration (Service)

    This calibration is intended for the airway pressure sensor in the breathing circuit, PEEP pressure sensor and the PEEP valve of the expiratory valve assembly. The standard pressure measurement device is used to calibrate the pressure sensors and the PEEP valve. 4 - 30 046-006272-00 A7™ Service Manual...
  • Page 243 1. Make sure that the anesthesia machine is in standby mode. 2. Select Setup-> Service-> Calibration-> Pressure Sensors to access the screen shown below. FIGURE 4-38 3. Select Calibrate Automatically button to open the menu shown below. A7™ Service Manual 046-006272-00 4 - 31...
  • Page 244 A four-way device is required to connect the sampling lines for pressure calibration. The following pictures show the four-way device, connectors on the calibration device and ventilator control board involved for pressure calibration. 4 - 32 046-006272-00 A7™ Service Manual...
  • Page 245 Connect the four way tube to the pressure sensor P1 of monitor board, pressure sensor P2 of PEEP, the tube marked as #72, and the low pressure port of Fluke VT-Plus. The tube marked as #9 will remain unconnected for this calibration. FIGURE 4-41 A7™ Service Manual 046-006272-00 4 - 33...
  • Page 246 8. Press the Next button to open the menu shown below. FIGURE 4-43 9. After selecting the desired auto calibration device, select Begin to access the calibration screen shown below. During the calibration, you can select Cancel to stop the calibration. 4 - 34 046-006272-00 A7™ Service Manual...
  • Page 247 Again to do the calibration again.Select Done to exit the calibration screen. FIGURE 4-45 • The screen shown below is displayed after a successful pressure sensor calibration. Select Done to exit the calibration screen. A7™ Service Manual 046-006272-00 4 - 35...
  • Page 248 Follow these steps to calibrate pressure sensors and the PEEP valve. 1. Make sure that the anesthesia machine is in standby mode. 2. Select Setup-> Service-> Calibration-> Pressure Sensors to access the screen shown below. 4 - 36 046-006272-00 A7™ Service Manual...
  • Page 249 Calibration System Calibration FIGURE 4-48 3. Select Calibrate Manually button to open the menu shown below. A7™ Service Manual 046-006272-00 4 - 37...
  • Page 250 3. Connect the four way tube to the pressure sensor P1 of monitor board, pressure sensor P2 of PEEP, the tube marked as #72, and the low pressure port of Fluke VT-Plus. The tube marked as #9 will remain unconnected for this calibration. 4 - 38 046-006272-00 A7™ Service Manual...
  • Page 251 Calibration System Calibration FIGURE 4-51 FIGURE 4-52 Calibration Device (TSI Certifier 4070) 5. Press the Begin button to open the menu shown below. A7™ Service Manual 046-006272-00 4 - 39...
  • Page 252 When Input Cal Value is displayed in the cell, input the standard pressure value displayed by the calibration device. After having inputted the standard pressure values of all the 32 calibration points, select Accept to check and save the calibration data. 4 - 40 046-006272-00 A7™ Service Manual...
  • Page 253 8. Press the Accept button and the screen shown below is displayed. • The screen shown below is displayed after a successful pressure sensor calibration. FIGURE 4-56 • The screen shown below is displayed if the pressure sensor calibration has failed. A7™ Service Manual 046-006272-00 4 - 41...
  • Page 254 After pressure calibration, test the accuracy of pressure sensors by referring to 3.7.5 Check the Pressure Sensor Accuracy. NOTE: In case of calibration failure, first fix the problem and then perform pressure calibration again. 4 - 42 046-006272-00 A7™ Service Manual...
  • Page 255 3. Check the settings of the calibration Measurement range error occurs to the [00 00 00 20] is displayed. device. airway pressure sensor. 4. See section 5.4 (pg. 5-71) "Sensors and Valves Problems". 5. Replace the board. A7™ Service Manual 046-006272-00 4 - 43...
  • Page 256 1. Check if there is enough gas supply for The resolution of the valve is not the whole calibration process. [00 01 00 00] is displayed. enough. 2. Check if the calibration device works well. 3. Replace the PEEP valve. 4 - 44 046-006272-00 A7™ Service Manual...

  • Page 257: Pressure And Flow Zeroing (Service)

    After that, automatic zeoring is performed once every 120 minutes. During mechanical ventilation, before automatic zeroing, the three-way valve is opened and closed for flushing valve. During zeroing or three-way valve opening and closing, the waveform will be depressed. A7™ Service Manual 046-006272-00 4 - 45...
  • Page 258 1. Select Setup-> Service-> Calibration-> Zero Sensors to access the screen shown below. FIGURE 4-59 2. Select Begin to access the zeroing screen as show below. During the zeroing, you can select Cancel to cancel the zeroing. 4 - 46 046-006272-00 A7™ Service Manual...
  • Page 259 Done to exit the zeroing screen. FIGURE 4-61 4. The screen shown below is displayed if the zeroing has failed. Select Try Again to do the zeroing again.Select Done to exit the zeroing screen. A7™ Service Manual 046-006272-00 4 - 47...
  • Page 260 5. The screen shown below is displayed after a successful zeroing. Select Done to exit the zeroing screen. FIGURE 4-63 NOTE: In case of zeroing failure, other faults may exist. You must isolate and eliminate the problem. 4 - 48 046-006272-00 A7™ Service Manual...

  • Page 261: Efcs Zeroing (User)

    After the gas supply is disconnected, zero offset may occur in the sensor of the EFCS if the pointer of the pressure gauge returns to zero but the EFCS still displays a non-zero flow value. You can zero the flowmeter manually to immediately eliminate measurement deviations caused by zero offset. A7™ Service Manual 046-006272-00 4 - 49...
  • Page 262 1. Select Setup > General> Zero Flow Meters to enter the screen shown below. Select Begin to start zeroing. FIGURE 4-64 2. The zeroing screen shown below is displayed when Begin is selected. During the zeroing, you can select Cancel to cancel the zeroing. 4 - 50 046-006272-00 A7™ Service Manual...
  • Page 263 Done to exit the zeroing screen. FIGURE 4-66 4. The screen shown below is displayed if the zeroing has failed. Select Try Again to do the zeroing again.Select Done to exit the zeroing screen. A7™ Service Manual 046-006272-00 4 - 51...
  • Page 264 5. The screen shown below is displayed after a successful zeroing. Select Done to exit the zeroing screen. FIGURE 4-68 NOTE: In case of zeroing failure, other faults may exist. You must isolate and eliminate the problem. 4 - 52 046-006272-00 A7™ Service Manual...

  • Page 265: Total Flow Sensor Calibration (Factory)

    2. Select [Setup] > [Service] > [Calibration] > [Total Flow Sensor] to enter the screen shown below. Prepare by following the instructed on the screen. FIGURE 4-69 3. Select [Begin] to enter the screen shown below. A7™ Service Manual 046-006272-00 4 - 53...
  • Page 266 The screen shown below is displayed if total flow sensor calibration fails. Select [Try Again] to calibrate again or [Done] to exit calibration. FIGURE 4-71 5. The screen shown below is displayed after successful total flow sensor calibration. Select [Done] to exit calibration. 4 - 54 046-006272-00 A7™ Service Manual...
  • Page 267 Calibration System Calibration FIGURE 4-72 6. The screen shown below is displayed if the ongoing calibration is cancelled. Select [Try Again] to calibrate again or [Done] to exit calibration. FIGURE 4-73 A7™ Service Manual 046-006272-00 4 - 55...

  • Page 268: Calibrate The Ag Module

    AG module Gas cylinder NOTE: When calibrating the internal AG module, open the back cover of the machine, disconnect the tubing as shown below and connect the standard gas to the gas inlet. 4 - 56 046-006272-00 A7™ Service Manual...

  • Page 269: Cylinder Yoke Regulator Calibration4

    The calibration steps of O2 and Air cylinder yoke regulators are same to those of N2O). For O2 and Air, the pressure in the cylinder must be at least 1000 psi. For N2O, the pressure in the cylinder must be at least 500 psi. A7™ Service Manual 046-006272-00 4 - 57...
  • Page 270 3. Unplug the tube connected to the unidirectional valve of the cylinder assembly and connect the tube to a Φ8 wye. Connect another end to the unidirectional valve and the other end to the pressure monitoring device. 4 - 58 046-006272-00 A7™ Service Manual...
  • Page 271 4. Start the system, turn on the cylinder gas supply (turn off the pipeline gas supply), and adjust the fresh gas flow to 1 L/min. 5. Remove the self-locking acorn nut at the head of the regulator. Install the cylinder. Self-locking nut FIGURE 4-78 A7™ Service Manual 046-006272-00 4 - 59...

  • Page 272: Adjust The Back Pressure Valve

    00 Y piec e and 3106-10-00 adapter connector to monitor and measure the pressure of the front end of the back pressure valve. The connection diagram and connecting ports are shown as follows. 4 - 60 046-006272-00 A7™ Service Manual...
  • Page 273 2. Disconnect the pipeline on the back end of the back pressure valve. 3. Connect to O2 source, and adjust O2 needle valve, while observing the flowmeter on the system interface of A7, to set the O2 flow rate to 5±0.1L/min. 4. Loose the nut of the back pressure valve.
  • Page 274 System Calibration Calibration Bolt FIGURE 4-83 7. Take off 3140-08-00 Y piece and 3106-10-00 adapter connector, and reconnect the pipeline. 4 - 62 046-006272-00 A7™ Service Manual...

  • Page 275: Repair And Troubleshooting

    Repair and Troubleshooting Troubleshooting Guidelines................................5-2 Technical Alarms Check ..................................5-3 Pneumatic Circuit System Problems............................5-23 Sensors and Valves Problems ................................. 5-71 Hardware and Electrical Problems .............................. 5-79 Software Update and Software Configuration Activation ................... 5-81 A7™ Service Manual 046-006272-00 5 - 1...

  • Page 276: Troubleshooting Guidelines

    It is imperative to use the designated equipment in order to ensure proper results of any and all test procedures. 5.1.4 Clean up the repair area After any repair, clean off the repair area. 5 - 2 046-006272-00 A7™ Service Manual...

  • Page 277: Technical Alarms Check

    The following sections detail how to troubleshoot technical alarms related to the modules mentioned above. For detailed information on possible causes and actions for other alarm and prompt messages, refer to the Operator’s Manual. A7™ Service Manual 046-006272-00 5 - 3...

  • Page 278: Startup Alarm Messages

    PEEP Safety Valve PEEP safety valve voltage expiratory valve assembly Failure error. 3. Replace the Ventilator Control Board when necessary. 4. Replace the expiratory valve assembly. 5. Replace the power board when necessary 5 - 4 046-006272-00 A7™ Service Manual...
  • Page 279 2. Check the cable connection between the module rack and Error selftest malfunction. CPU board. External AG: Time out 3. Check if the module rack works normally. 4. Replace the external AG module. A7™ Service Manual 046-006272-00 5 - 5...
  • Page 280 3. If the fault disappears after O2 supply is disconnected, it can be considered that O2 Prop Valve cannot be closed. Consider to replace O2 Prop Valve and return the faulty flow sensor or proportional valve to R&D. 5 - 6 046-006272-00 A7™ Service Manual...
  • Page 281 2. If the problem still persists, it belongs to hardware failure. It may be 0632 EFCS VCM board PCBA failure. Replace with a new board and return the faulty board 0x00001000 FPGA configuration error. to R&D. A7™ Service Manual 046-006272-00 5 - 7...

  • Page 282: Cpu Board Runtime Alarm

    1. Check if the battery voltage is within specifications. Battery 2. Check if the cable is connected correctly. Battery Undetected Undetected 3. Replace the battery. 4. If the problem persists, replace the power board. 5 - 8 046-006272-00 A7™ Service Manual...
  • Page 283 1. Check that the circuit is installed in place. Breathing Circuit Not Breathing Circuit 2. Test the connection between the connection line and the High Mounted Not Mounted connector. 3. Replace the power board. A7™ Service Manual 046-006272-00 5 - 9...

  • Page 284: Runtime Alarms Of Flow Sensor Board

    2. Access the service menu and retract BFCS. Enabled If the flow sensor malfunctions, 3. Restart the machine. the backup flow control system is 4. Replace the flow sensor board. enabled automatically. 5 - 10 046-006272-00 A7™ Service Manual...
  • Page 285 4. Replace the CPU board when necessary. The BFCS ejection position sensor malfunctions. The BFCS retraction position See “BFCS Failure Alarm Numbering Conventions” Backup Flow Control Error sensor malfunctions. on page 5-14. BFCS LED voltage input errors occur. A7™ Service Manual 046-006272-00 5 - 11...
  • Page 286 4. If the problem still persists after replacement, replace with a new 0632 EFCS Three-way valve VCM board PCBA and return the faulty three-way valve or board to R&D. 0x00040000 power-on voltage too high 5 - 12 046-006272-00 A7™ Service Manual...
  • Page 287 If cable connection is in good condition and the problem still persists after restarting the machine, it can be considered that the flow sensor is fault. Replace the flow sensor. 4. Return the faulty board or flow sensor to R&D. A7™ Service Manual 046-006272-00 5 - 13...
  • Page 288 It may be cable failure or 0632 EFCS VCM board PCBA failure. 2. If the problem still persists after re-plugging the cable, replace with a new LED Power Voltage Too 0x00000002 board and return the faulty board to R&D. High 5 - 14 046-006272-00 A7™ Service Manual...
  • Page 289 Then conduct BFCS system selftest again. If the problem still persists, consider replacing the three-way valve and return the faulty flow sensor or three-way valve to R&D. A7™ Service Manual 046-006272-00 5 - 15...

  • Page 290: Ventilator Control Board Runtime Alarm

    2. Check if the sampling lines of the sensor are connected in correct Check Flow Sensors High 2.Exp reverse flow order. 3. Test the measurement status of the sensor in the valves test tool. 5 - 16 046-006272-00 A7™ Service Manual...
  • Page 291 1. Check if the circuit and tubes are correctly installed (if the sampling Automatic circuit Disabled - Leak Test port is occluded and if the drain valve is occluded) leak test failure 2. Do leak test again. Failed A7™ Service Manual 046-006272-00 5 - 17...
  • Page 292 2. If so, check the connections between the ACGO module and the Undetected is detected. CPU board, and between the ACGO module and the VCM. 3. Replace the electronic ACGO module when necessary. 4. Replace the CPU board or VCM when necessary. 5 - 18 046-006272-00 A7™ Service Manual...

  • Page 293: Real-Time Alarms Of External Ag Module

    CO2 Accuracy Unspecified exceeded the module 2. Replace the AG module. accuracy range. The measured value 1. Re-calibrate the AG module. Enf Accuracy Unspecified exceeded the module 2. Replace the AG module. accuracy range. A7™ Service Manual 046-006272-00 5 - 19...
  • Page 294 3. Replace the AG module. 1. Reduce the concentration of the monitored gas to the The monitored value normal range. FiCO2 Overrange exceeded the module 2. Re-calibrate the AG module. measurement range. 3. Replace the AG module. 5 - 20 046-006272-00 A7™ Service Manual...
  • Page 295 3. Replace the AG module. 1. Reduce the concentration of the monitored gas to the The monitored value FiSEV Overrange normal range. exceeded the module 2. Re-calibrate the AG module. measurement range. 3. Replace the AG module. A7™ Service Manual 046-006272-00 5 - 21...

  • Page 296: Runtime Alarms Of Internal Ag Module

    AG module. 3. Replace the AG module. The measured AG 1. Calibrate the AG module again. Internal AG Error 12 module parameter values 2. Replace the AG module. exceed the normal range 5 - 22 046-006272-00 A7™ Service Manual...

  • Page 297: Pneumatic Circuit System Problems

    PU tube (6X200) M6G-020026---* PU tube (6X300) PU tube (8X200) M6G-020014---* Breathing tube M6G-020017---* Ø6 silicone tube A21-000007---* A7 Service Manual 046-001140-00 Test Lung, Adult 0138-00-0012 Tank Wrench 0367-00-0080 Y-Fitting 15 mm connection 0103-00-0508 Respiration Tube, 0.6 meter silicone, 15mm 0004-00-0076 Breathing Bag 2.3 L silicone...
  • Page 298 0119-00-0235** AG Calibration gas 0075-00-0048-01** * = is part of the 115-009450-00 A7 troubleshooting kit. ** = for units with a AG gas module only The following pictures show the tools listed above. FIGURE 5-1 (1) PU tube (4X200), (2) PU tube (6X100), (3) PU tube (6X200), (4) PU tube (6X300), (5) PU tube (8X200), (6) Ø6 silicone tube, (7) Breathing tube, (8) 3106-04-06 adapter...
  • Page 299 3126-10-00 tube plug, (17) Y piece, (18) 3140-08-00 Y piece, (19) Breathing tube Y piece Negative pressure ball: FIGURE 5-2 Circuit adapter test fixture: FIGURE 5-3 Flow sensor pressure sampling pipeline test fixture: FIGURE 5-4 A7™ Service Manual 046-006272-00 5 - 25...
  • Page 300 Pneumatic Circuit System Problems Repair and Troubleshooting Vaporizer manifold test fixture: FIGURE 5-5 Anesthesia machine calibration device (fluke VT plus): FIGURE 5-6 Anesthesia machine calibration device (TSI Certifier 4070): FIGURE 5-7 5 - 26 046-006272-00 A7™ Service Manual...
  • Page 301 The connectors for pressure sampling lines can be connected with Ø6 silicone tubes and the Ø6 quick plug-in connectors with PU tube (6X100), PU tube (6X200) and PU tube (6X300), as shown below. A7™ Service Manual 046-006272-00 5 - 27...
  • Page 302 The circuit adapter test fixture can be mounted either onto the circuit adapter or onto the removed breathing system. The following pictures show the test fixture mounted in position. FIGURE 5-11 FIGURE 5-12 5 - 28 046-006272-00 A7™ Service Manual...
  • Page 303 Inspiration/Expiration Connector Coupling, as shown below. Perform test after connecting the Ø6 silicone tube to the connector for pressure sampling line. A7™ Service Manual 046-006272-00 5 - 29...
  • Page 304 Precautions for Use of Vaporizer Manifold Test Fixture When using the vaporizer manifold test fixture, remove the o-ring seal on the vaporizer manifold assembly. Then slide the test fixture onto the connector, as shown below. FIGURE 5-17 5 - 30 046-006272-00 A7™ Service Manual...
  • Page 305 FIGURE 5-19 When the negative pressure ball is connected with the tested component, the ball permits the gas in only, but meanwhile it’s free to release air when it’s pressed. A7™ Service Manual 046-006272-00 5 - 31...

  • Page 306: Gas Supplies And Drive Gas

    ‘‘Leak Test of Low- leaks. pressure Pneumatic Circuit System’’ on page 5-57, Pipeline pressure gauge The pipeline pressure shows inaccurate Replace the pipeline pressure gauge. gauge is damaged. readings or no readings. 5 - 32 046-006272-00 A7™ Service Manual...
  • Page 307 2. Disconnect tube 57. The end of the tube which connects the auxiliary O2 supply is not pulled out but the end to Y piece is pulled out.Connect 1MPa test pressure gauge to the above Y piece through “3106-04-06 adapter connector”. A7™ Service Manual 046-006272-00 5 - 33...
  • Page 308 6. Disconnect tube 39 which connects the O2 supply inlet assembly to the O2 pipeline pressure gauge. Remove the end of tube to the O2 supply inlet assembly. 7. Connect 1MPa test pressure gauge to the outlet of O2 supply inlet assembly through “3106-04- 06 adapter connector”. 5 - 34 046-006272-00 A7™ Service Manual...
  • Page 309 2. Connect 1MPa test pressure gauge, the pulled-out end of tube 119, and EFCS module N2O inlet through “3106-04-06 adapter connector” and Y piece (17). A7™ Service Manual 046-006272-00 5 - 35...
  • Page 310 0.1 MPa (14.5 psi), it indicates that the N2O pipeline pressure gauge is damaged. Handle this problem as described in the troubleshooting table. 9. Reconnect tubing to pressure gauge. Reconnect tube 40. 5 - 36 046-006272-00 A7™ Service Manual...
  • Page 311 6. Pull out No.41 PU tube which connects the AIR supply inlet assembly to the AIR pipeline pressure gauge. Remove the tube end which connects AIR supply inlet assembly. 7. Connect 1MPa test pressure gauge to the outlet of AIR supply inlet assembly through “3106-04- 06 adapter connector”. A7™ Service Manual 046-006272-00 5 - 37...
  • Page 312 PU tube and also the pulled-out end of tube 47 to the two connectors of “3140- 08-00 Y piece” respectively. 4. Connect the test pressure gauge to the third connector of “3140-08-00 Y piece” through “3106- 06-08 adapter connector” and “3106-04-06 adapter connector”. 5 - 38 046-006272-00 A7™ Service Manual...
  • Page 313 Pressure Low” alarm does not occur 10 seconds later, it indicates that the pressure switch on the integrated pneumatic circuit of the expiratory valve assembly is defective. Troubleshoot this problem as described in the relevant failure table. A7™ Service Manual 046-006272-00 5 - 39...
  • Page 314 Regulator Calibration hose (PN 0453-00-1216). Then, turn on the pipeline gas supply again. Observe the adjusted pressure through the test pressure gauge. Adjust to 200kPa. 5 - 40 046-006272-00 A7™ Service Manual...

  • Page 315: Anesthetic Gas Delivery System

    The CGO assembly leaks. Replace the CGO assembly. Check the seals and tubes at the fresh The fresh gas connections of the circuit gas connections. Replace the defective adapter assembly leak. parts and re-install the parts. A7™ Service Manual 046-006272-00 5 - 41...
  • Page 316 4. Release the negative pressure ball as shown below. If the negative pressure ball is fully expanded within 30 seconds, it indicates that the O2 flush button assembly is damaged. FIGURE 5-30 5 - 42 046-006272-00 A7™ Service Manual...
  • Page 317 6. Connect the other end of the negative pressure ball to the pulled-out end of No.25 PU tube through 3106-06-08 adapter connector, as shown below, and then flatten the negative pressure ball to remove the gas inside. A7™ Service Manual 046-006272-00 5 - 43...
  • Page 318 9. Occlude the pulled-out tube end on the total flowmeter by using 3126-08-00 tube plug. FIGURE 5-33 10. Compress the negative pressure ball still connected to tube 25 to bleed the air inside. 5 - 44 046-006272-00 A7™ Service Manual...
  • Page 319 13. Occlude the pulled-out tube end on the back pressure regulator by using one 3126-08-00 tube plug and connect the negative pressure ball to the pulled-out end of No.26 PU tube through 3106-06-08 adapter connector. FIGURE 5-35 14. Compress the negative pressure ball to bleed the air inside. A7™ Service Manual 046-006272-00 5 - 45...
  • Page 320 18. Disconnect tube 122 and plug out its end connecting the back pressure valve. Connect the negative pressure ball to the pulled-out end of tube 122 through “3106-06-08 adapter connector”. 19. Flatten the negative pressure ball to remove the gas inside. 5 - 46 046-006272-00 A7™ Service Manual...
  • Page 321 “3106- 06-00 adapter connector” and PU tube (6X200) (disconnect tube 28 for AIR branch and tube 73 for O2 branch). Compress the negative pressure ball to bleed the gas inside. A7™ Service Manual 046-006272-00 5 - 47...
  • Page 322 Pneumatic Circuit System Problems Repair and Troubleshooting FIGURE 5-38 FIGURE 5-39 5 - 48 046-006272-00 A7™ Service Manual...
  • Page 323 3. Pull out No.43 which connects the system switch assembly to the Y piece. Disconnect at the Y piece end and occlude the pulled-out tube end through one 3106-06-08 adapter connector and one 3126-08-00 tube plug. 4. Flatten the negative pressure ball to remove the gas inside. A7™ Service Manual 046-006272-00 5 - 49...
  • Page 324 FIGURE 5-42 9. Release the negative pressure ball. If the negative pressure ball is fully expanded within 30 seconds during one of the two tests, it indicates that the system switch assembly is damaged. 5 - 50 046-006272-00 A7™ Service Manual...
  • Page 325 The end of the tube which connects the vaporizer manifold assembly is pulled out, and connected with the negative ball through one 3106-06-08 adapter connector 5. Flatten the negative pressure ball to remove the gas inside. A7™ Service Manual 046-006272-00 5 - 51...
  • Page 326 If the four tests are all past, then continue the following tests. 9. Put the seal ring back, mount the vaporizer and turn it on. 5 - 52 046-006272-00 A7™ Service Manual...

  • Page 327: Breathing System

    The seal for the circuit adapter assembly is Replace the seal, which is required to be damaged. replaced once a year. The bellows housing or bellows is not Re-install the bellows housing or bellows. installed properly. Ensure their correct installation. A7™ Service Manual 046-006272-00 5 - 53...
  • Page 328 Repair the flow sensor pressure sampling pipeline after checking as per the The flow sensor pressure sampling procedures described in “Leak Test of pipeline leaks. Flow Sensor Pressure Sampling Pipeline” on page 5-55. 5 - 54 046-006272-00 A7™ Service Manual...
  • Page 329 (before mounting, pull out the push rod of the injector) connector and the connector for the flow sensor pressure sampling pipeline test fixture by using a Y piece, as shown below. A7™ Service Manual 046-006272-00 5 - 55...
  • Page 330 (one connector out of No.3 through 6 connectors on the test fixture) for the circuit adapter test fixture by using a Y piece, as shown below. 5 - 56 046-006272-00 A7™ Service Manual...
  • Page 331 After making sure that the flow sensor pressure sampling pipeline is not leaky, perform leak tests of the low-pressure pneumatic circuit system as shown in the following figures. FIGURE 5-49 System Leak Test A7™ Service Manual 046-006272-00 5 - 57...
  • Page 332 Pneumatic Circuit System Problems Repair and Troubleshooting FIGURE 5-50 Leak test of the part only working in the manual ventilation mode FIGURE 5-51 Leak test of the pipelines inside the main unit 5 - 58 046-006272-00 A7™ Service Manual...
  • Page 333 4. Set the pressure of the APL valve to maximum. 5. Occlude the inspiratory and expiratory ports and bag arm port by using three breathing tubes and one breathing tube Y piece as shown below. A7™ Service Manual 046-006272-00 5 - 59...
  • Page 334 (of the anesthesia machine calibration device) connector (positive pressure end), and No.2 connector to which drive gas corresponds on the circuit adapter test fixture by using a Y piece, as shown below. 5 - 60 046-006272-00 A7™ Service Manual...
  • Page 335 Connect the other end of the negative pressure ball to the No.7 connector (on the circuit adapter test fixture) fresh gas pipeline of the circuit adapter test fixture, as shown below. A7™ Service Manual 046-006272-00 5 - 61...
  • Page 336 8. Select [Setup] >[Service] > [Diagnostic Tests] > [Valves] to set the A/D value of the PEEP valve to make PEEP exceed 50 cmH2O. Set the A/D value of the inspiratory valve to “0” to produce 0 L/min of flow. Set PEEP safety valve to ON, as shown below. 5 - 62 046-006272-00 A7™ Service Manual...
  • Page 337 PU tube (6X300) (quantity: 1) • Breathing tube (quantity: 3) • Y piece (quantity: 1) • Breathing tube Y piece (quantity: 1) • Breathing tube adapter connector (quantity: 1) • T-shaped Allen wrench (quantity: 1) A7™ Service Manual 046-006272-00 5 - 63...
  • Page 338 10cmH2O within 30 seconds, it indicates that absorb canister assembly are leaky. The test is failed. This step is required when the absorbent canister assembly is in bypass on or bypass off status. FIGURE 5-57 Lucer adapter connector 5 - 64 046-006272-00 A7™ Service Manual...
  • Page 339 6. Check the seals on the two connections of the lifting device. It they are damaged, replace the seal and then re-mount the lifting device onto the breathing system. 6. Check the accessories and circuit inspiratory and expiratory parts A7™ Service Manual 046-006272-00 5 - 65...
  • Page 340 3. Remove the support tube on the median plate. Check the seals and replace the defective ones. 4. Remove the Auto/Manual ventilation switch. Check the seals and replace the defective ones. 8. Check the ACGO assembly 5 - 66 046-006272-00 A7™ Service Manual...
  • Page 341 5. Pull out No.52 and 53 PU tubes which connect the O2 flush button assembly and the vaporizer manifold assembly to the ACGO assembly. Disconnect at ACGO assy. end. 6. Occlude the pulled-out tube ends by using 3126-06-00 and 3126-08-00 tube plugs, as shown below. A7™ Service Manual 046-006272-00 5 - 67...

  • Page 342: Tidal Volume

    ” on page 4-8.. Repair the leaking points after checking as *The flow sensor pressure sampling per the procedures described in “Leak Test pipeline is leaky. of Flow Sensor Pressure Sampling Pipeline” on page 5-55.. 5 - 68 046-006272-00 A7™ Service Manual...
  • Page 343 7. Select [Setup] > [Service] > [Diagnostic Tests] > [Valves] to set the A/D value of the PEEP valve to make PEEP exceed 40 cmH2O. Set PEEP safety valve to ON, as shown below. A7™ Service Manual 046-006272-00 5 - 69...
  • Page 344 For each point, the flows measured by the three sensors should be the same. If not, the measured value by the flow sensor is inaccurate. Troubleshoot the possible causes marked “*” in the above table. 5 - 70 046-006272-00 A7™ Service Manual...

  • Page 345: Sensors And Valves Problems

    FIGURE 5-65 5.4.2 Correspondence with Hardware Components The following figure shows how the sampling lines of the sensors are actually connected on the ventilator control board. A7™ Service Manual 046-006272-00 5 - 71...

  • Page 346: Preparations Before Using Diagnostic Tests

    2. Check the A/D counts of the sensors in the valve-test tool menu, which are the zero points of the sensors. 3. If the zero point of one sensor is outside of specifications, it indicates that the ventilator control board is defective. You need to replace the board. 5 - 72 046-006272-00 A7™ Service Manual...

  • Page 347: Connections And Measurement Of The Flow Sensors Problems

    5.4.6 Connections and Measurement of the Pressure Sensors Problems The pressure sensor has one sampling line. Connection errors include: • The sampling line is not connected. • The sampling line is connected incorrectly. A7™ Service Manual 046-006272-00 5 - 73...
  • Page 348 Otherwise, the calibration data have errors. You need to calibrate the pressure sensor again. For details, refer to “Check the Flow Sensor Accuracy” on page 3-25. 5 - 74 046-006272-00 A7™ Service Manual...

  • Page 349: Opening State Of The Inspiratory Valve Problems

    0V. If these two conditions are met simultaneously, the ventilator control board is normal. 6. If the PEEP safety valve is defective, replace the expiratory valve assembly. After replacement, you can use the similar method to check if the problem is fixed. A7™ Service Manual 046-006272-00 5 - 75...

  • Page 350: Opening State Of The Peep Valve Problems

    D/A value is greater than this range, the pressure output will increase with the increase of D/ A value. This phenomenon also exists for the inspiratory valve. 3. For subsequent diagnosis rules, refer to ‘‘Opening State of the Inspiratory Valve Problems’’ on page 5-75. 5 - 76 046-006272-00 A7™ Service Manual...

  • Page 351: Basal Flow Adjustment Of O2 Needle Valve

    M3X3 set screws (dispensing thread sealant 243), see FIGURE 5-69. The screws are located inside the two threaded holes vertical to each other, The tightening torque is 4 to 5kgf.cm. FIGURE 5-69 A7™ Service Manual 046-006272-00 5 - 77...
  • Page 352 5L/min. Then rotate the needle valve to decrease flow until the needle valve is fully closed. Confirm that the flow of flow analyzer is 1.1±0.1L/min. Repeat for three times and make sure the flow satisfies the requirement. 5 - 78 046-006272-00 A7™ Service Manual...

  • Page 353: Hardware And Electrical Problems

    The heater is damaged. The heater is ineffective. Replace the heater. The internal sensor of heater is ineffective. The cable connected to heater Check and make sure that the cable is falls off. connected properly. A7™ Service Manual 046-006272-00 5 - 79...
  • Page 354 The cables between CPU board CPU board and infrared and infrared communication Properly insert the cables. communication board fails. board get loose. The communication board or Replace the communication board or CPU board is damaged. CPU board. 5 - 80 046-006272-00 A7™ Service Manual...

  • Page 355: Software Update And Software Configuration Activation

    00027-00), the Power Board (P/N: 115-018145-00) or the EFCS Board (P/ N: 115-018150-00). 1. Connect the Ethernet port of the PC to the Ethernet port of the A7 using the Ethernet Crossover Cable. 2. Before running Mindray Patient Monitor System Update Tool, verify that the IP address of the PC is set to 192.168.23.1., and the Subnet mask is set to 255.255.255.0.
  • Page 356 Software Update and Software Configuration Activation Repair and Troubleshooting FIGURE 5-70 3. Make sure that the Mindray Patient Monitor System Update Tool has been installed to the PC. If it has not been installed then follow these steps: a. Run the SystemUpdateToolForService.exe file .
  • Page 357 Version and Note are correct from the table above. If they are correct then click OK. i. Turn on the A7 unit on, wait at least ten seconds before proceeding to the next step. j. Click “Start (Single)” on the Mind ray Anesthesia Machine and Ventilator Software Upgrade Tool.
  • Page 358 Once the last file is upgraded turn off the A7 unit and then restart A7 unit. p. Check the software version on the A7 by clicking Setup then Service, enter the service password "789789"...

  • Page 359: Repair And Disassembly

    Repair and Disassembly Prepare for Disassembly ..................................6-2 Disassemble the Assemblies ................................6-3 Disassemble the Breathing System ............................6-71 A7™ Service Manual 046-006272-00 6 - 1...

  • Page 360: Prepare For Disassembly

    4. Make sure that N2O and AIR pipeline pressure gauges read zero. 5. Disconnect the O2 pipeline supply (or close the O2 cylinder valve). Push the O2 flush button to bleed O2 from the system. 6. Set the system switch to OFF. 6 - 2 046-006272-00 A7™ Service Manual...

  • Page 361: Disassemble The Assemblies

    6.2.1 Disassemble the Internal Assemblies of the Machine Upper Half 6.2.1.1 Open the Service Door Turn the two screws on the service door counter-clockwise one half turn to open the door. FIGURE 6-1 A7™ Service Manual 046-006272-00 6 - 3...
  • Page 362 Remove the Pressure Regulator Assembly 1. Open the service door. 2. Unplug the tubes from the pressure regulator assembly. 3. Unscrew the three screws on the pressure regulator assembly and remove it. FIGURE 6-3 6 - 4 046-006272-00 A7™ Service Manual...
  • Page 363 Remove the Electronic Flow Control System Assembly 1. Open the service door. 2. Unplug the related cables and tubes from the EFCS module. 3. .Unscrew the three screws and remove the EFCS module. FIGURE 6-4 A7™ Service Manual 046-006272-00 6 - 5...
  • Page 364 2. Disconnect the plug of the proportional valve from the flowmeter monitoring board. 3. Unscrew the two screws and remove the battery valve isolation metal sheet. FIGURE 6-5 4. Unscrew the two screws and remove the proportional valve. FIGURE 6-6 6 - 6 046-006272-00 A7™ Service Manual...
  • Page 365 2. Disconnect the cables from the electronic flowmeter. 3. Unscrew the four screws to remove the O2, N2O and AIR electronic flowmeters. Take care not to drop the sealing rings below the electronic flowmeters. FIGURE 6-7 A7™ Service Manual 046-006272-00 6 - 7...
  • Page 366 5. Unscrew the four screws to remove the O2, N2O and AIR electronic flowmeters. Remove the sealing rings below the electronic flowmeters. FIGURE 6-9 6. Unscrew the four screws to remove the flowmeter outlet assembly. FIGURE 6-10 6 - 8 046-006272-00 A7™ Service Manual...
  • Page 367 2. Disconnect the cables from the flowmeter monitoring board. 3. Unscrew the four screws to remove the upper assembly. FIGURE 6-12 4. Unscrew the four screws to remove the flowmeter monitoring board. FIGURE 6-13 A7™ Service Manual 046-006272-00 6 - 9...
  • Page 368 Remove the Back Pressure Valve Assembly 1. Open the service door. 2. Unplug the tubes from back pressure valve assembly. 3. Unscrew the four screws on the back pressure valve assembly to remove the assembly. FIGURE 6-15 6 - 10 046-006272-00 A7™ Service Manual...
  • Page 369 FIGURE 6-16 6.2.1.12 Remove the Vaporizer Manifold 1. Open the service door. 2. Unplug the tubes from the vaporizer manifold. 3. Unscrew the four screws and remove the vaporizer manifold. FIGURE 6-17 A7™ Service Manual 046-006272-00 6 - 11...
  • Page 370 2. Unplug the tubes from the three-way valve assembly, and disconnect the cables. FIGURE 6-18 3. Unscrew the four screws from the slide on the left side of the main unit to remove the slide. FIGURE 6-19 6 - 12 046-006272-00 A7™ Service Manual...
  • Page 371 Repair and Disassembly Disassemble the Assemblies 4. Unscrew the two screws to remove the three-way valve assembly. FIGURE 6-20 5. The removed three-way valve assembly is as shown below.. FIGURE 6-21 A7™ Service Manual 046-006272-00 6 - 13...

  • Page 372: Disassemble Hardware Box

    2. Lift off the top plate to remove it. FIGURE 6-23 6.2.2.2 Remove the Cell Battery from the CPU Board 1. Remove the top plate assembly. 2. Remove the cell battery from the CPU board. FIGURE 6-24 6 - 14 046-006272-00 A7™ Service Manual...
  • Page 373 Remove the Ventilator Control Board NOTE: When replacing the Ventilator Control Board, software reinstallation may be required. 1. Remove the top plate assembly. 2. Unplug the related cables and tubes from the ventilator control board. FIGURE 6-26 A7™ Service Manual 046-006272-00 6 - 15...
  • Page 374 Repair and Disassembly 3. Unscrew the four screws fastening the ventilator control board to remove it. FIGURE 6-27 Refer to “Connections Between Pneumatic Circuit, Breathing System and Ventilator Control Board” on page 1-10. 6 - 16 046-006272-00 A7™ Service Manual...
  • Page 375 3. Unplug the filter cable plug. Unscrew the screw on the power board support sheet, three screws and one nut fastening the power board to remove the power board. FIGURE 6-29 4. Unscrew the screw on the power board support sheet to remove the support sheet. FIGURE 6-30 A7™ Service Manual 046-006272-00 6 - 17...
  • Page 376 4. Unscrew the three screws on the CPU board output bracket and remove the CPU board and the metal sheet. FIGURE 6-32 5. Remove the power board. 6. Unscrew the three screws to and remove the wind shield. FIGURE 6-33 6 - 18 046-006272-00 A7™ Service Manual...
  • Page 377 7. Remove the power board insulation overlay. FIGURE 6-34 8. Disconnect the cables from the motherboard. 9. Unscrew the two screws on the motherboard output bracket and the 12 screws fastening the motherboard to remove the motherboard. FIGURE 6-35 A7™ Service Manual 046-006272-00 6 - 19...
  • Page 378 FIGURE 6-36 3. Unscrew the three screws on the solenoid valve to remove the solenoid valve assembly. FIGURE 6-37 Refer to “Connections Between Pneumatic Circuit, Breathing System and Ventilator Control Board” on page 1-10.. 6 - 20 046-006272-00 A7™ Service Manual...
  • Page 379 3. Unscrew the two screws to remove the speaker. FIGURE 6-38 6.2.2.9 Remove the Rocker Switch 1. Remove the top plate assembly. 2. Unplug the plug of the rocker switch and remove the rocker switch. FIGURE 6-39 A7™ Service Manual 046-006272-00 6 - 21...
  • Page 380 2. Unplug the cables from the top light board. 3. Unscrew the five screws to remove this assembly. FIGURE 6-40 4. Unscrew the four screws to remove the top light board. FIGURE 6-41 6 - 22 046-006272-00 A7™ Service Manual...
  • Page 381 2. Open the service door.Remove the cables and tubes from the hardware box assembly. FIGURE 6-42 3. Unscrew the three screws fastening the power plug protection hook to remove the power cord and protection hook. FIGURE 6-43 A7™ Service Manual 046-006272-00 6 - 23...
  • Page 382 FIGURE 6-45 6. Remove related cables on the rear panel assembly from other assemblies 7. Unscrew the elevn screws on the rear panel of hardware box to remove the rear panel assembly. FIGURE 6-46 6 - 24 046-006272-00 A7™ Service Manual...
  • Page 383 2. Unscrew the four screws on the fan to remove the fan. FIGURE 6-47 Remove the Filter 1. Remove the rear panel assembly of hardware box. 2. Unscrew the five screws on the filter to remove the filter. FIGURE 6-48 A7™ Service Manual 046-006272-00 6 - 25...
  • Page 384 3. Unscrew the two screws on each auxiliary outlet to remove the auxiliary outlets. The A5 has four (4) auxiliary outlets, as shown in the photograph below. The A3 has three (3) auxiliary outlets (not shown). FIGURE 6-50 6 - 26 046-006272-00 A7™ Service Manual...

  • Page 385: Disassemble The Work Surface

    2. Lift up the locking piece on the right rail of drawer, and press down on the locking piece on the left rail at the same time. FIGURE 6-52 3. Take out the drawer. A7™ Service Manual 046-006272-00 6 - 27...
  • Page 386 3. Unscrew the five screws on the work surface cover plate. FIGURE 6-53 4. .Lift off the cover plate from the work surface. When the cover plate is removed, the internal structure of the work surface is shown as below: FIGURE 6-54 6 - 28 046-006272-00 A7™ Service Manual...
  • Page 387 1. Open the service doorand refer to “Open the Service Door” on page 6-3. 2. Unplug the AGSS transfer tube connecting to the exhaust tube and refer to “Remove the AGSS Assembly” on page 6-61. FIGURE 6-56 3. “Remove the AGSS Assembly” on page 6-61. A7™ Service Manual 046-006272-00 6 - 29...
  • Page 388 5. Remove the pentagonal knob on the cylinder yoke assembly FIGURE 6-58 6. Unplug the tube connected to the overfill protection cup.Unscrew the four screws on the upper rear panel (yoke cover) to remove it. FIGURE 6-59 6 - 30 046-006272-00 A7™ Service Manual...
  • Page 389 1. Remove the work surface cover plate and refer to “Remove the Work Surface Cover Plate” on page 6-28.. 2. Remove the metal cover plate and refer to “Remove the Metal Cover Plate” on page 6-29.. 3. Unplug the tubes from the O2 flush assembly. A7™ Service Manual 046-006272-00 6 - 31...
  • Page 390 FIGURE 6-64 8. Unscrew the two screws around the O2 flush button to remove the button from the machine. If neccessory, clean the O2 flush button with a soft, lint-free cloth. The recommended cleaning 6 - 32 046-006272-00 A7™ Service Manual...
  • Page 391 Breathing Circle” on page 6-60. 4. Unplug the tubes from the separate ACGO outlet. 5. Unscrew the four screws on the separate ACGO outlet and romove,and pull out the outlet to remove the cover sheet. A7™ Service Manual 046-006272-00 6 - 33...
  • Page 392 7. Unscrew the four screws on the cylinder bracket to remove the assembly. FIGURE 6-68 8. Unscrew the four screws on the cylinder bracket to remove O2, N2O and AIR cylinder bracket assemblies. FIGURE 6-69 6 - 34 046-006272-00 A7™ Service Manual...
  • Page 393 3. Cut the cable ties on the spring tubes, then disconnect the spring tubes from the connectors. Remove the spring tubes. FIGURE 6-71 4. Re-install the spring tubes. Tie the spring tubes as follows: FIGURE 6-72 A7™ Service Manual 046-006272-00 6 - 35...
  • Page 394 2. Unscrew the 16 screws and pull out the upper part of the auxiliary work surface assembly horizontally. FIGURE 6-73 3. Unscrew the 12 screws to remove the auxiliary work surface cover plate. FIGURE 6-74 6 - 36 046-006272-00 A7™ Service Manual...
  • Page 395 Remove the Non-magnetic Touch Latch 1. Unscrew the 6 screws to remove the rear cover plate of the cart. FIGURE 6-76 2. Unscrew the four screws to remove the non-magnetic touch latch. FIGURE 6-77 A7™ Service Manual 046-006272-00 6 - 37...

  • Page 396: Disassemble The Display

    Remove the Alarm Lamp Board 1. Remove the display assembly. 2. Unplug the related cables from the alarm lamp board. 3. Unscrew the two mounting screws on the alarm lamp board to remove the board. FIGURE 6-79 6 - 38 046-006272-00 A7™ Service Manual...
  • Page 397 Remove the Touch Screen Control Board 1. Remove display assembly. 2. Unscrew the four screws and the cover plate of the touch screen control board. FIGURE 6-82 3. Unplug the related cables from the touch screen control board. A7™ Service Manual 046-006272-00 6 - 39...
  • Page 398 2. Unscrew the four screws and the cover plate of the backlight inverter board. FIGURE 6-84 3. Unplug the related cables from the backlight inverter board. 4. Unscrew the two screws on the backlight inverter board to remove the board. FIGURE 6-85 6 - 40 046-006272-00 A7™ Service Manual...
  • Page 399 1. Remove the display assembly and refer to “Remove the Display” on page 6-45. 2. Unplug the related cables from the encoder board. FIGURE 6-86 3. Unscrew the four screws on the encoder board to remove the encoder board. FIGURE 6-87 A7™ Service Manual 046-006272-00 6 - 41...
  • Page 400 4. Unscrew the three screws to remove the encoder assembly. FIGURE 6-90 5. Unplug the related cables from the encoder board and unscrew the four screws to remove the encoder board. FIGURE 6-91 6 - 42 046-006272-00 A7™ Service Manual...
  • Page 401 FIGURE 6-93 6.2.5.7 Remove the Touch Screen 1. Remove the display assembly. 2. Unscrew the four screws on the cover plate of the touchscreen control board to remove the cover plate.. FIGURE 6-94 A7™ Service Manual 046-006272-00 6 - 43...
  • Page 402 4. Unscrew the 11 screws around the display backplane and then remove the display backplane. FIGURE 6-96 5. Slightly lift the touch screen off the display front cover to remove the touch screen. FIGURE 6-97 6 - 44 046-006272-00 A7™ Service Manual...
  • Page 403 2. Unscrew the 9 screws on the display adaptation board cover plate and on the backlight board cover plate. FIGURE 6-98 3. Unplug the related cables from the display. FIGURE 6-99 4. Unscrew the four screws and remove the display. FIGURE 6-100 A7™ Service Manual 046-006272-00 6 - 45...
  • Page 404 Repair and Disassembly 6.2.5.9 Remove the Display Replacement Package 1. Remove the touchscreen. 2. After the above mentioned assemblies are removed from the display assembly, the remaining part is the display replacement package. FIGURE 6-101 6 - 46 046-006272-00 A7™ Service Manual...

  • Page 405: Remove The Module Rack Assembly

    2. Unplug the cable plug connecting the module rack assembly. FIGURE 6-102 3. Unscrew the four screws to remove the module rack assembly. FIGURE 6-103 4. Unscrew the five screws to remove the infrared communication board. FIGURE 6-104 A7™ Service Manual 046-006272-00 6 - 47...

  • Page 406: Remove The Module Rack Fan

    3. Unscrew the four screws to remove the module rack bracket assembly. FIGURE 6-105 4. Unscrew the two screws to remove the fan and bracket. FIGURE 6-106 5. Unscrew the four screws to remove the module rack fan. FIGURE 6-107 6 - 48 046-006272-00 A7™ Service Manual...

  • Page 407: Remove The Panel Of Pressure Gauges

    7. To remove the work surface cover plate assembly, refer to “Remove the Work Surface Cover Plate” on page 6-28. 8. Unscrew one screw from the back of the machine to remove the BFCS support bar. FIGURE 6-109 A7™ Service Manual 046-006272-00 6 - 49...
  • Page 408 10. Unscrew the four screws on the gauge panel to remove the panel. When taking out the gauge panel, note that high pressure test tube shall avoid the internal tubes and cables of the machine. FIGURE 6-111 6 - 50 046-006272-00 A7™ Service Manual...
  • Page 409 3. If replacing the pressure gauge cover is necessary, take out the white gasket inside the gauge cover. Then remove the gauge cover from the gauge panel. Before replacement, clear the residual adhesive strip on the gauge panel. FIGURE 6-113 A7™ Service Manual 046-006272-00 6 - 51...
  • Page 410 1. Remove the panel of the pressure gauge and refer to “Remove the Panel of Pressure Gauges” on page 6-49.. 2. Unscrew the four screws on the system switch to remove the switch. FIGURE 6-115 6 - 52 046-006272-00 A7™ Service Manual...
  • Page 411 2. Disconnect the tubes and cables from the needle valve assembly. 3. Unscrew the three screws to remove the needle valve assembly. FIGURE 6-117 4. Unscrew the two screws on the contact switch to remove the contact switch. A7™ Service Manual 046-006272-00 6 - 53...
  • Page 412 Remove the Electromagnet 1. Remove the panel of the pressure gauge and refer to 6.2.8. 2. Disconnect the cable from the stepper motor. 3. Unscrew the three screws to remove the electromagnet assembly. FIGURE 6-118 6 - 54 046-006272-00 A7™ Service Manual...
  • Page 413 FIGURE 6-119 4. Unscrew the two screws to remove the motor position check board and metal sheet. FIGURE 6-120 5. Unscrew the three screws to remove the motor position check board. FIGURE 6-121 A7™ Service Manual 046-006272-00 6 - 55...
  • Page 414 2. Unscrew the four screws to remove the needle valve extension mechanism and the needle valve module. FIGURE 6-122 3. Unscrew the 4 screws to remove the needle valve extension mechanism. FIGURE 6-123 6 - 56 046-006272-00 A7™ Service Manual...

  • Page 415: Disassemble The Vacuum Suction Related Assembly

    2. Remove the rear cover plate assembly and refer to 6.2.3.4. 3. Unplug the tube connected to the pipeline vacuum inlet assembly. 4. Unscrew the two screws fixing the pipeline vacuum inlet assembly to remove the assembly. FIGURE 6-125 A7™ Service Manual 046-006272-00 6 - 57...
  • Page 416 FIGURE 6-126 3. Take out the vacuum control panel assembly from the front of the machine. FIGURE 6-127 4. Unscrew the four screws to remove the vacuum control main body assembly FRU. FIGURE 6-128 6 - 58 046-006272-00 A7™ Service Manual...

  • Page 417: Remove The Auxiliary Gas Outlet Assembly

    FIGURE 6-131 6.2.10 Remove the Auxiliary Gas Outlet Assembly 1. Open the service door and refer to “Open the Service Door” on page 6-3.. 2. Unplug the related tubes from auxiliary gas outlet assembly. A7™ Service Manual 046-006272-00 6 - 59...

  • Page 418: Remove The Rotating Block Of Breathing Circle

    1. Remove the work surface cover plate and refer to “Remove the Work Surface Cover Plate” on page 6-28. 2. Unplug the breathing system assembly from the rotating block. 3. Unscrew the four screws and remove the rotating block of breathing circle. FIGURE 6-134 6 - 60 046-006272-00 A7™ Service Manual...

  • Page 419: Remove The Agss Assembly

    Remove the AGSS Assembly 1. Unplug the transfer tubes from AGSS assembly. 2. Loosen the AGSS rail locking knob on the AGSS assembly. Lift the AGSS assembly along the side to remove the assembly. FIGURE 6-135 A7™ Service Manual 046-006272-00 6 - 61...

  • Page 420: Remove The Electronically Controlled Acgo Drive Valve

    1. Unscrew the 6 screws to remove the back cover plate of the cart. FIGURE 6-136 2. Unplug the related tubes and cables from the ACGO drive valve. 3. Unscrew the two screws to remove the ACGO drive valve. FIGURE 6-137 6 - 62 046-006272-00 A7™ Service Manual...

  • Page 421: Remove The Built-In Anesthesia Module

    2. Unplug the related tubes and cables from the anesthesia module. 3. Unscrew the four screws to remove the anesthesia module and the metal sheet bracket as well. FIGURE 6-139 4. Unscrew the four screws to remove the anesthesia module. FIGURE 6-140 A7™ Service Manual 046-006272-00 6 - 63...
  • Page 422 5. Unscrew the three screws to remove the anesthesia module adaptation board. FIGURE 6-141 After removing the built-in anesthesia module communication cable, unscrew the three screws to remove the anesthesia module adaptation board. 6 - 64 046-006272-00 A7™ Service Manual...

  • Page 423: Remove The Acgo Assembly (Electronically Controlled)

    1. Unscrew the 6 screws to remove the back cover plate of the cart. FIGURE 6-142 2. Unplug the tubes and cables from the ACGO assembly (electronically controlled). 3. Unscrew the four screws to remove the ACGO assembly (electronically controlled)l. FIGURE 6-143 A7™ Service Manual 046-006272-00 6 - 65...

  • Page 424: Remove Anesthesia Module Inlet Pipeline Assembly

    4. Unscrew the two screws to remove the anesthesia module inlet pipeline assembly. FIGURE 6-145 Cut the cable tie used to fix the filter and disconnect the tube from the filter to remove the filter. 6 - 66 046-006272-00 A7™ Service Manual...

  • Page 425: Disassemble The Base Assembly

    Disassemble the Assemblies 6.2.17 Disassemble the Base Assembly 6.2.17.1 Remove the Caster Assembly 1. Remove the breathing system and tilt the A7 backward. FIGURE 6-146 2. Unscrew the four screws and remove the caster assembly. FIGURE 6-147 A7™ Service Manual...
  • Page 426 Repair and Disassembly 6.2.17.2 Remove the Brake Indicator Drive Plate I and II 1. Tilt A7 backward. 2. Unscrew the two screws on the brake indicator drive plate I to remove the plate. FIGURE 6-148 3. Unscrew the one screw on the brake indicator drive plate II to remove the plate.
  • Page 427 Repair and Disassembly Disassemble the Assemblies 6.2.17.3 Remove the Brake Assembly 1. Tilt A7 backward. 2. Unscrew the six screws on the brake assembly to remove the assembly. FIGURE 6-150 6.2.17.4 Remove the Brake Main Axis 1. Tilt A7 backward.
  • Page 428 Disassemble the Assemblies Repair and Disassembly 6.2.17.5 Remove the Principal Axis of Brake 1. Tilt A7 backward. 2. Remove the brake indicator drive plate II. 3. Unscrew the six screws on the brake rod to remove the rod. 6 - 70 046-006272-00 A7™...

  • Page 429: Remove The Breathing Tubes

    1. Remove the filter from the Y piece. FIGURE 6-152 2. Disconnect the breathing tubes from the inspiration/expiration connectors on the circuit. FIGURE 6-153 A7™ Service Manual 046-006272-00 6 - 71...

  • Page 430: Remove The Flow Sensor

    2. Pull out the inspiration and expiration connectors together with their locking nuts. And then pull out the flow sensors horizontally. FIGURE 6-155 3. The following pictures show the appearance of inspiratory and expiratory flow sensor assemblies. FIGURE 6-156 6 - 72 046-006272-00 A7™ Service Manual...

  • Page 431: Remove The Manual Bag

    Repair and Disassembly Disassemble the Breathing System 6.3.3 Remove the Manual Bag Remove the manual bag from the connector on the breathing system as shown below. FIGURE 6-157 A7™ Service Manual 046-006272-00 6 - 73...

  • Page 432: Remove The Absorbent Canister

    Sodalime is a caustic substance and is a strong irritant to eyes, skin and respiratory system. Affected areas should be flushed with water. If irritation continues after flushing with water, seek medical assistance immediately. 6 - 74 046-006272-00 A7™ Service Manual...
  • Page 433 Pre-pak absorber sealing cushion in the side flange of the Pre-pak absorber, as shown below.. FIGURE 6-160 Make sure that the sealing cushion is correctly installed. The comparison between correct installation and incorrect installation is shown below.. FIGURE 6-161 A7™ Service Manual 046-006272-00 6 - 75...

  • Page 434: Remove The Co2 Bypass Assembly

    FIGURE 6-163 Make sure that the sealing cushion is correctly installed. The comparison between correct installation and incorrect installation is shown below. 6 - 76 046-006272-00 A7™ Service Manual...

  • Page 435: Remove The Prepak Handle

    Remove the Prepak Handle 1. Refer to 6.3.4 and 6.3.5 to remove the absorber canister assembly and CO2 bypass assembly. 2. Unscrew the screw to remove the handle and the cam. FIGURE 6-165 A7™ Service Manual 046-006272-00 6 - 77...

  • Page 436: Remove The Contact Switch Of The L-Shaped Handle

    Assembly” on page 6-76. to remove the absorber canister assembly and CO2 bypass assembly. 2. Unscrew the two screws to remove the handle and the cam. FIGURE 6-166 3. Unplug the cable and, unscrew the two screws to remove the contact switch. FIGURE 6-167 6 - 78 046-006272-00 A7™ Service Manual...

  • Page 437: Remove The Patient Circle Assembly

    Remove the Patient Circle Assembly 1. Remove the CO2 Bypass assembly as per section “Remove the CO2 Bypass Assembly” on page 6-76.. 2. Pull the patient circle assembly away from the rotating block assembly. FIGURE 6-168 A7™ Service Manual 046-006272-00 6 - 79...

  • Page 438: Remove The Bellows Assembly

    Disassemble the Breathing System Repair and Disassembly 6.3.9 Remove the Bellows Assembly 1. Turn the bellows dome counterclockwise and lift off to remove. FIGURE 6-169 2. Remove the bellows from the bellows base. FIGURE 6-170 6 - 80 046-006272-00 A7™ Service Manual...

  • Page 439: Remove The Pop-Off Valve Assembly

    2. Unscrew the four locking screws as shown in the picture. Hold and pull up the Pop-Off valve cover to remove it. FIGURE 6-171 3. Take out the rubber and metal Pop-Off valve. FIGURE 6-172 A7™ Service Manual 046-006272-00 6 - 81...

  • Page 440: Disassemble The Expiratory/Inspiratory Check Valve Assemblies

    6.3.11 Disassemble the Expiratory/Inspiratory Check Valve Assemblies 1. Turn the check valve cover counterclockwise to remove it. FIGURE 6-173 2. Pull out the check valve as shown in the following picture. FIGURE 6-174 6 - 82 046-006272-00 A7™ Service Manual...

  • Page 441: Remove The Water Collection Cup

    Disassemble the Breathing System 6.3.12 Remove the Water Collection Cup 1. Hold the water collection cup and turn it counterclockwise to remove it. FIGURE 6-175 2. Remove the water collection cup. FIGURE 6-176 A7™ Service Manual 046-006272-00 6 - 83...

  • Page 442: Remove The Airway Pressure Gauge

    6.3.14 Remove the Bag Arm 1. Unscrew the locking nut counterclockwise and lift straight up to remove bag arm. FIGURE 6-178 2. Remove the bag arm from the bag arm mount. FIGURE 6-179 6 - 84 046-006272-00 A7™ Service Manual...

  • Page 443: Remove The Back Upper Cover And Back Lower Cover Assemblies

    6.3.1,6.3.1, 6.3.3, , 6.3.9, 6.3.12, 6.3.13, 6.3.14. 2. Unscrew the six screws as shown in the following picture. FIGURE 6-180 3. Unscrew the knurled thumb nut as shown in the following picture. FIGURE 6-181 A7™ Service Manual 046-006272-00 6 - 85...
  • Page 444 Disassemble the Breathing System Repair and Disassembly 4. Turn over the circle. Pull up to separate the back upper cover assembly. FIGURE 6-182 5. Pull leftwards to take out the back lower cover assemblies. FIGURE 6-183 6 - 86 046-006272-00 A7™ Service Manual...

  • Page 445: Remove The Front Upper Cover, Median Plate And Front Lower Cover Assemblies

    1. Remove the Back Upper Cover and Back Lower Cover Assemblies as per section 6.3.15. 2. Remove the two screws on the lower cover. FIGURE 6-184 3. Loosen the six screws on the upper cover. FIGURE 6-185 A7™ Service Manual 046-006272-00 6 - 87...
  • Page 446 Disassemble the Breathing System Repair and Disassembly 4. Loosen the captive screws on the upper cover. FIGURE 6-186 5. Hold the upper cover assembly tightly and pull it up to remove it. FIGURE 6-187 6 - 88 046-006272-00 A7™ Service Manual...
  • Page 447 Repair and Disassembly Disassemble the Breathing System 6. Pull up the median plate assembly to remove it. FIGURE 6-188 A7™ Service Manual 046-006272-00 6 - 89...

  • Page 448: Disassemble The Automatic/Manual Ventilation Switch Assembly

    Lower Cover Assemblies” on page 6-87.. 2. Turn over the upper cover assembly to access the three screws as shown in the following picture. FIGURE 6-189 3. Unscrew the three screws as show in the picture. FIGURE 6-190 6 - 90 046-006272-00 A7™ Service Manual...
  • Page 449 Repair and Disassembly Disassemble the Breathing System 4. Remove the O-Ring and pull out the axis pin. FIGURE 6-191 FIGURE 6-192 5. Remove the compression spring and replace the two seals (P/N 0030-10-13077) FIGURE 6-193 A7™ Service Manual 046-006272-00 6 - 91...

  • Page 450: Remove The Apl Valve Assembly

    Disassemble the Breathing System Repair and Disassembly 6.3.18 Remove the APL Valve Assembly Turn the locking ring counterclockwise and pull the APL valve assembly straight up to remove it. FIGURE 6-194 6 - 92 046-006272-00 A7™ Service Manual...

  • Page 451: Replacement Parts

    Replacement Parts Introduction .........................................7-2 A7™ Service Manual 046-006272-00 7 - 1...

  • Page 452: Introduction

    Replacement Parts Introduction The A7 anesthesia system can be broken down into 18 big parts based on its structure and functions. Each big part includes several replaceable parts. Table 9-1 through Table 9-17 list the information about each replaceable part and Figure 9-1 through Figure 9-17 indicate the position of each replaceable part on the A7.

  • Page 453: Diagrams And Tables

    FIG.NO. DESCRIPTION PART NUMBER 115-018165-00(FDA) Auxiliary Gas Outlet Assembly 115-018166-00(Canadian) Breathing circuit unit FRU(A7) 115-027250-00 CO2 Bypass Assembly, A series 115-036378-00 Vacuum control panel assembly (A7) 115-015246-00 Total flowmeter 115-014479-00 115-030000-00(FDA) BFCS assembly 115-030001-00(Canadian) Drawer Assembly 115-034451-00 Drawer Lock A-series...
  • Page 454 Introduction Replacement Parts FIG.NO. DESCRIPTION PART NUMBER N2O high pressure gauge assembly (A7)(must be 115-024851-00 and 115-033639-00 ordered together with the copper tube) Air high pressure gauge assembly (A7)(must be 115-024852-00 and 115-033638-00 ordered together with the copper tube) O2 high pressure gauge assembly (A7)(must be...
  • Page 455 Caster assembly (right) 115-016956-00 Caster assembly (left) 115-016955-00 AGSS transfer tube 801-0631-00074-00 AGSS assembly FRU 115-023175-00 Vacuum suction liquid collection bottle bracket assembly (A7 115-017947-00 Canadian) Overfill protection cup assembly 115-018131-00 Work surface cover plate assembly FRU 801-0631-00120-00 Yoke Panel...
  • Page 456 Introduction Replacement Parts FIG.NO. DESCRIPTION PART NUMBER Suction filter 082-001327-00 Negative pressure suction tube (including filters) 115-033264-00 7.1.2.2 A7 Upper Half 7 - 6 046-006272-00 A7™ Service Manual...
  • Page 457 Back pressure valve 115-040040-00 3-way valve assembly 115-015898-00 Lithium battery 11.1V 4500mAh LI23S002A 115-018012-00 material package N2O supply inlet assembly (A7/DISS) 115-014825-00 Air supply inlet assembly (A7/DISS) 115-014826-00 O2 supply inlet assembly (DISS) 115-014827-00 Pipeline negative pressure inlet assembly 115-018133-00...
  • Page 458 A7 CPU board 115-040636-00 Battery interface board PCBA 801-0631-00109-00 Ventilator control board 801-0631-00027-00 051-001259-00 Mother board PCBA (A7) 051-002662-00 (VGA) 3-way valve assembly 801-0631-00146-00 Fuse on power board 010-000087-00 NOTE: Follow the two steps below to install the VGA output.
  • Page 459 Auto/Manual spring 801-0631-00114-00 Limit switch 801-0631-00101-00 Gas reservoir assembly 801-0616-00007-00 O2 Flush Assembly 801-0631-00044-00 Touchpad 801-0631-00052-00 Track Pad Module 115-017032-00 Driver gas assembly (A7) 115-026819-00 Sensor interface board PCBA 801-0631-00089-00 Docking station plate 041-006279-00 A7™ Service Manual 046-006272-00 7 - 9...
  • Page 460 Introduction Replacement Parts FIG.NO. DESCRIPTION (English) PART NUMBER Docking station support plate 041-007227-01 Exhale spring tube assembly 115-037605-00 APL valve spring tube assembly 115-034449-00 Driving gas spring tube assembly 115-037606-00 7 - 10 046-006272-00 A7™ Service Manual...
  • Page 461 Bellows Dome, A series 801-0631-00054-00 Bellows Assembly, A series 0601-30-78968 Airway pressure gauge, A series 115-025563-00 Breathing circuit unit FRU (A7) 115-027250-00 Expiratory Flow Sensor Assembly, A series 801-0631-00056-00 Inspiratory / Expiratory Connector, A series 801-0631-00057-00 Inspiratory / Expiratory Connector Rotary Cap, A series...
  • Page 462 CO2 Absorber Base Drain Valve, A series 801-0631-00112-00 CO2 Absorber Base, A series 801-0631-00100-00 CO2 Absorbent Canister, A series 801-0631-00066-00 CO2 Bypass Assembly, A series 115-036378-00 Prepak Handle FRU 115-015765-00 L-shape Bracket Assembly 115-017030-00 7 - 12 046-006272-00 A7™ Service Manual...
  • Page 463 Replacement Parts Introduction 7.1.2.7 Valve assembly FIG.NO. DESCRIPTION PART NUMBER Check valve dome, A series 801-0631-00061-00 Valve cover 801-0631-00110-00 Disc 801-0631-00111-00 A7™ Service Manual 046-006272-00 7 - 13...
  • Page 464 Introduction Replacement Parts 7.1.2.8 A7 Display Assembly FIG. NO. DESCRIPTION PART NUMBER Encoder board 051-001260-00 Encoder 010-000150-00 Encoder knob (balance gas) 115-015904-00 Encoder knob (O2) 115-015903-00 7 - 14 046-006272-00 A7™ Service Manual...
  • Page 465 Replacement Parts Introduction 7.1.2.9 A7 Main Body of Display Assembly FIG.NO. DESCRIPTION PART NUMBER Alarm lamp board PCBA 801-0631-00019-00 Touchscreen 801-0631-00014-00 Display exchange package A7 115-039181-00 Touchscreen control board 801-0631-00018-00 Display interface board PCBA (0632) 051-001258-00 Display panel 043-002982-01 A7™ Service Manual...
  • Page 466 FIG.NO. DESCRIPTION PART NUMBER Connector (Vaporizer Mount) 801-0631-00117-00 Valve of Vaporizer Mounting Manifold 801-0631-00106-00 Spring of Vaporizer Mounting Manifold 801-0631-00107-00 Locking plate 041-000166-00 Locking pin 0611-20-45417 Spring, special for vaporizer, S type M6T-010009--- 7 - 16 046-006272-00 A7™ Service Manual...
  • Page 467 7.1.2.11 EFCS Assembly FIG.NO. DESCRIPTION PART NUMBER O2 flow sensor adapter board PCBA of the flowmeter (A7) 051-001414-01 N2O flow sensor adapter board PCBA of the flowmeter (A7) 051-001416-01 Air flow sensor adapter board PCBA of the flowmeter (A7) 051-001415-01...
  • Page 468 Introduction Replacement Parts 7.1.2.12 BFCS Assembly FIG.NO. DESCRIPTION PART NUMBER Protection support for the needle valve knob (A7/FDA/silkscreen) 043-006011-00 O2 needle valve knob (A7) 041-006773-00 Air needle valve knob (A7) 041-006775-00 Rolling bearing of the needle valve knob 041-006772-00 Fixing block of knob (A7)
  • Page 469 2.2/4.4 mm anesthesia airway sampling line (60-12110-00/used only 9200-10-10557 inside the machine) Anesthetic gas inlet tubes assembly(0632) 115-017879-00 1.4/2.8 mm anesthesia airway sampling line (60-12110-00/used only 9200-10-10556 inside the machine) Plug (AG) 041-007225-00 A7™ Service Manual 046-006272-00 7 - 19...
  • Page 470 Introduction Replacement Parts 7.1.2.14 A7 Auxiliary Gas Outlet Assembly FIG.NO. DESCRIPTION PART NUMBER Auxiliary gas outlet fittings 801-0631-00122-00 7 - 20 046-006272-00 A7™ Service Manual...
  • Page 471 Replacement Parts Introduction 7.1.2.15 Base Assembly (A7) FIG.NO. DESCRIPTION PART NUMBER Spare brake assembly (new color) 115-016692-00 Connector of the Brake 801-0631-00095-00 Indicator Drive Plate 801-0631-00072-00 Principal Axis of the Brake 801-0631-00096-00 Base of Chasis Assembly 115-016691-00 A7™ Service Manual...
  • Page 472 Introduction Replacement Parts 7.1.2.16 A7 Cart Assembly FIG.NO. DESCRIPTION PART NUMBER ACGO drive valve assembly 115-015948-00 M01A AION AG module (03-31 type) 115-002504-00 Anesthetic gas inlet tubes assembly(0632) 115-017879-00 Filter .0.45um,TP026AATV004AD01 082-000423-00 Anesthesia signal transfer board (service part) 801-0613-00033-00 Electronically ACGO assembly...
  • Page 473 Replacement Parts Introduction 7.1.2.17 BFCS Motor assembly FIG.NO. DESCRIPTION PART NUMBER BFCS drive assembly 115-029847-00 Solenoid 115-018144-00 BFCS position switch board 051-001286-01 A7™ Service Manual 046-006272-00 7 - 23...
  • Page 474 PART NUMBER AGSS 3 ways connector assembly 115-026796-00 Gas Cylinder Wrench 115-033063-00 A7 Pre-Operation Checklist, English 801-0631-00081-00 A7 Auxiliary O2/Air Reference Card 801-0631-00082-00 A series cleaning and disinfection card 115-040734-00 Preventative Maintenance Kit (12 months) 801-0631-00084-00 Periodic Maintenance Kit (36 months)
  • Page 475 082-002365-00 Transparent PU Tube 4*6 M6G-020026--- Tubing. Soft precision PU tubing, 4mmx2.5mm, transparent M6G-020046--- System Tubing PUR.AION,1.4/2.8mm,60-12110-00 9200-10-10556 System Tubing PUR.AION, 2.2/4.4mm,60-12120-00 9200-10-10557 PE Tubing.ID2XOD4 082-002600-00 Tubing.MPF tube 2mmX3.5mm (1feet) M6G-020005--- Tube.ID3/32"XOD5/32",Silicon 60-12140-00 A7™ Service Manual 046-006272-00 7 - 25...
  • Page 476 082-001288-00 for suction needle valve O-ring 2X1.8 082-001286-00 for suction needle valve O-ring 18X2.5 049-000813-00 for breathing system base Tank Washer 0348-00-0185 O-ring, 0.35X1.78 FKM A70 082-000676-00 Maintenance Kit for O-rings 801-0631-00141-00 Shown 7 - 26 046-006272-00 A7™ Service Manual...
  • Page 477 Cable, ACGO Valve Status 009-002940-00 Cable, Internal AG Module 009-003131-00 Line Cord 009-000094-00 Cable, O2 Pressure Switch 0621-20-69588 Cable, Circuit Switch 0621-20-78593 2-pin O2 Sensor Pedestal 801-0631-00067-00 Filter Power 250AC 15A Panel Mount 801-0631-00029-00 A7™ Service Manual 046-006272-00 7 - 27...
  • Page 478 Introduction Replacement Parts This page intentionally left blank. 7 - 28 046-006272-00 A7™ Service Manual...

  • Page 479: Warranty

    Warranty Warranty Statements....................................8-2 Disclaimers........................................8-3 Manufacturer's Responsibility................................8-3 Phone Numbers and How to Get Assistance..........................8-3 A7™ Service Manual 046-006272-00 8 - 1...

  • Page 480: Warranty Statements

    Mindray DS USA, Inc. ' s option at the factory or at an authorized Distributor, any product which shall under normal use and service appear to the Company to have been defective in material or workmanship.

  • Page 481: Disclaimers

    These operating instructions explain all features of the A7 system and are correct at time of manufacture. Instructions and models produced at a later stage, may contain improvements or modifications that were not included in previous models.
  • Page 482 August 18, 2016 046-006272-00...

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