Heyer Modular+ - Page 4

Theory of Operation
4
2.15.4.4 Inspiratory and expiratory valves............................................................................. 38
2.15.4.5 Airway pressure relief valve .................................................................................... 38
2.15.4.6 Room Air valve ........................................................................................................ 38
2.15.4.7 Diaphragm valves.................................................................................................... 38
2.15.2.7.1 Status of the diaphragm valves:....................................................................... 39
2.15.2.7.2 Machine OFF Or Ventilator In Standby............................................................ 39
2.15.2.7.3 Manual / Spontaneous Mode, INSPIRATION And EXPIRATION.................... 39
2.15.2.7.4 CMV Child / Adult Mode, INSPIRATION.......................................................... 39
2.15.2.7.5 CMV Child / Adult, EXPIRATION..................................................................... 39
2.15.2.7.6 CMV Adult, EXPIRATION And PEEP .............................................................. 39
2.15.2.7.7 Compliance Test Patient Module ..................................................................... 40
2.15.2.7.8 Leak Test Patient Module and Fresh Gas Module........................................... 40
3 Repair Information.......................................................................................................................... 41
3.1 Introduction ............................................................................................................................. 41
3.2 Warnings and precautions ...................................................................................................... 41
3.2.1 Precautions...................................................................................................................... 41
3.2.2 Warnings.......................................................................................................................... 41
3.3 Troubleshooting Guidelines .................................................................................................... 42
3.4 Troubleshooting Charts........................................................................................................... 42
3.4.1 Error Messages during ventilation ................................................................................... 42
3.4.2 Alarm messages during the compliance test, leak test and O2 calibration..................... 46
3.4.2.1 Messages during the system tests ........................................................................... 47
3.4.3 Symptoms of Fuse Failures............................................................................................. 49
3.5 Required Tools........................................................................................................................ 50
3.6 Disassembly instructions......................................................................................................... 50
3.6.1 Connecting and disconnecting vaporizers....................................................................... 50
3.6.2 Removing the compressed gas tanks (PIN-Index).......................................................... 50
3.6.3 Removing the Patient Module.......................................................................................... 51
3.6.4 Removing the CO
2
Absorber Canister............................................................................. 51
3.6.5 Removing the Bellows and Dome System ...................................................................... 51
3.6.6 Removing the Airway Pressure Limiting Valve (APL)...................................................... 51
3.6.7 Inspecting/replacing the Decoupling, Bellow and Expiratory Valves............................... 52
3.6.8 Disassembling the Room Air, Inspiration and expiration valves...................................... 52
3.6.9 Removing the Gas Block Module .................................................................................... 52
3.6.10 Removing the flow tubes.............................................................................................. 52
3.6.11 Removing the pressure gauges ................................................................................... 53
3.6.12 Removing the Module 2 Circuit Board Set................................................................... 53
3.6.13 Removing Module1 Circuit Board Set.......................................................................... 53
3.6.14 Removing the Power Supply Module........................................................................... 53
3.6.15 Removing Internal Regulators, Proportional Valve and Flow Divider.......................... 54
4 Maintenance and Calibration ......................................................................................................... 55
4.1 Introduction ............................................................................................................................. 55
4.2 Calibration Warnings and Precautions.................................................................................... 55
4.3 Test Procedure........................................................................................................................ 56
4.3.1 General ............................................................................................................................ 56
4.3.2 Inspecting/replacing consumable parts ........................................................................... 56
4.3.3 Power supply checks ....................................................................................................... 61
4.3.4 Functional Tests............................................................................................................... 62
4.3.4.1 Pneumatic tests........................................................................................................ 62
4.3.4.2 Alarm Tests............................................................................................................... 63
4.3.4.3 Electrical Tests ......................................................................................................... 65
4.4 Service Software..................................................................................................................... 66
4.5 Key code Access..................................................................................................................... 67
4.6 Navigation ............................................................................................................................... 68
4.6.1 System Testing ................................................................................................................ 70
4.6.2 Coefficient programming.................................................................................................. 79
4.6.2.1 O
2
sensor calibration ................................................................................................ 79
4.6.2.2 P1 Pressure sensor calibration................................................................................. 81
4.6.2.3 P2 Pressure sensor calibration................................................................................. 83
4.6.2.4 Temperature Sensor Calibration .............................................................................. 85
4.6.2.5 Proportional Valve Calibration.................................................................................. 87
4.6.2.6 Internal Flow Sensor Calibration .............................................................................. 92