A7™ Service Manual 046-006272-00 i
Table of Contents
Table of Contents
Foreword ...............................................................................................................................................................................................................................vii
Warnings, Cautions, and Notes .....................................................................................................................................................................................vii
Warnings................................................................................................................................................................................................................................vii
Cautions................................................................................................................................................................................................................................viii
Notes........................................................................................................................................................................................................................................ix
Theory of Operation ............................................................................................................................................ 1 - 1
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............................................................................................................................................................................................................... 1 - 13
Key to Symbols.................................................................................................................................................................................................. 1 - 14
Description.......................................................................................................................................................................................................... 1 - 14
Anesthesia System Components ............................................................................................................................................... 1 - 42
Auxiliary Outlets................................................................................................................................................................................................ 1 - 42
Work Light Board.............................................................................................................................................................................................. 1 - 42
The Breathing System .................................................................................................................................................................... 1 - 44
Brief Introduction ............................................................................................................................................................................................. 1 - 44
Automatic Mode, Inspiration ....................................................................................................................................................................... 1 - 44
Automatic Mode, Expiration ........................................................................................................................................................................ 1 - 45
Manual Mode, Inspiration ............................................................................................................................................................................. 1 - 45
Manual Mode, Expiration............................................................................................................................................................................... 1 - 46
Pneumatic PEEP ................................................................................................................................................................................................ 1 - 47
Ventilator in Standby ...................................................................................................................................................................................... 1 - 47
Breathing System Components .................................................................................................................................................................. 1 - 47
Ventilator UI ....................................................................................................................................................................................... 1 - 49
Display.................................................................................................................................................................................................................. 1 - 49
CPU Board ........................................................................................................................................................................................................... 1 - 57
Ventilator Control and Drive........................................................................................................................................................ 1 - 60
Mother Board..................................................................................................................................................................................................... 1 - 60
Ventilator Control and Drive Board ........................................................................................................................................................... 1 - 70
Battery .................................................................................................................................................................................................................. 1 - 77
Infrared Communication Board .................................................................................................................................................................. 1 - 79
Anesthesia Signal Interface Board.............................................................................................................................................................. 1 - 80
Breathing System Heater............................................................................................................................................................................... 1 - 81
Electrical Flow Control System.................................................................................................................................................... 1 - 81
EFCS Monitoring Board .................................................................................................................................................................................. 1 - 81
BFCS Position Board ........................................................................................................................................................................................ 1 - 85
Total Flow Meter Backlight Board .............................................................................................................................................................. 1 - 86
Air Flow Sensor Interface Board.................................................................................................................................................................. 1 - 86
Nitrous Oxide Flow Sensor Interface Board ............................................................................................................................................ 1 - 88
O2 Flow Sensor Interface Board.................................................................................................................................................................. 1 - 89
Ventilator Pneumatic- O2 Drive Gas ......................................................................................................................................... 1 - 91
Ventilator Pneumatic Drive........................................................................................................................................................................... 1 - 91
Drive Pressure-High Pressure Regulator (200 kPa, 29 psi)................................................................................................................. 1 - 91
Drive Gas Assembly ......................................................................................................................................................................................... 1 - 91
Tube Color Coding........................................................................................................................................................................................... 1 - 91
Installation Guide ................................................................................................................................................ 2 - 1
Preparation - Additional Material Required ..............................................................................................................................2 - 2
Assembly................................................................................................................................................................................................2 - 3
Unpacking and Setup ........................................................................................................................................................................................2 - 3
Breathing System and Breathing System Accessories and Checkout Procedures ................................................................... 2 - 18
Vaporizers (if available) .................................................................................................................................................................................. 2 - 18
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