Heyer Modular Service manual

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HEYER Modular

Anesthesia System

Service Manual

Rev.2.1.0

Software version Service software: 1.8

Table of Contents

HEYER MEDICAL AG

Carl-Heyer-Strasse 1-3

56130 Bad Ems

Germany

Tel. +49 - 2603 – 791 - 3

Fax. +49 - 2603 – 791 - 209

E-mail: info@heyermedical.de

Theory of Operation

0 Table of Contents

0 Table of Contents............................................................................................................................. 3

0.1 Table of Figures ........................................................................................................................6

1 General Information..........................................................................................................................7

1.1 Guidelines .................................................................................................................................7

1.2 Product improvements ..............................................................................................................7

1.3 Manufacturer’s Liability .............................................................................................................7

1.4 Manufacturer’s specification ..................................................................................................... 8

1.5 Updating status .........................................................................................................................8

1.6 Warning, Precautions and Notes ..............................................................................................9

1.6.1 Warnings............................................................................................................................ 9

1.6.2 Precautions......................................................................................................................10

1.6.3 Notes................................................................................................................................11

2 Theory of Operation .......................................................................................................................13

2.1 Microprocessor-Controlled Ventilator...................................................................................... 13

2.2 Patient Module ........................................................................................................................13

2.3 Gas Conditioning Unit .............................................................................................................13

2.4 The Ventilator Unit ..................................................................................................................13

2.5 Adjustable Alarms ...................................................................................................................13

2.5.1 P

2.6 Fresh Gas Decoupling ............................................................................................................14

2.7 Compliance compensation...................................................................................................... 14

2.8 Electrical supply ......................................................................................................................15

2.8.1 Electrical components...................................................................................................... 16

2.9 Power supply module.............................................................................................................. 17

2.9.1 Connectors on power supply board AVM 2-1.................................................................. 18

2.9.2 Fuses on power supply board AVM 2-1........................................................................... 19

2.9.3 Charging / discharging control for the battery:.................................................................20

2.9.4 Status Indicators Of Battery Control:...............................................................................20

2.10

2.10.1

2.11

2.11.1

2.11.2

2.11.2.1 Plug connectors on board AVM 3-1 ........................................................................ 24

2.11.2.2 Plug connectors on board AVM3-2 ......................................................................... 25

2.12

2.13

2.14

2.14.1

2.14.2

2.14.3

2.14.4

2.14.5

2.14.6

2.14.7

2.15

2.15.1

2.15.2

2.15.3

2.15.3.1 CMV mode, inspiration............................................................................................32

2.15.3.2 CMV mode, expiration.............................................................................................33

2.15.3.3 Manual mode, inspiration ........................................................................................34

2.15.3.4 Manual mode, expiration.........................................................................................35

2.15.3.5 Spontaneous mode, inspiration...............................................................................36

2.15.3.6 Spontaneous mode, expiration................................................................................ 37

2.15.4

2.15.4.1 Ventilation bellows system ......................................................................................38

2.15.4.2 Manual Respiration Bag / Reservoir........................................................................ 38

2.15.4.3 CO2 absorber...........................................................................................................38

limiting on alarm violation......................................................................................... 14

max

Module 1.............................................................................................................................. 21

Connectors on module 1..............................................................................................22

Ventilator Module 2, AVM 3-1 and AVM 3-2.......................................................................23

Parts list module 2........................................................................................................ 24

Connectors on module 2..............................................................................................24

Display................................................................................................................................. 25

Battery .................................................................................................................................25

Ventilator pneumatic............................................................................................................ 26

Ventilator pneumatic drive............................................................................................ 27

HP pressure reducer....................................................................................................27

LP- double stage pressure reducer..............................................................................27

Solenoid valves MV1 to MV4 .......................................................................................27

Pneumatic driving module............................................................................................28

Flow metering module..................................................................................................28

Tube color coding......................................................................................................... 28

The patient module (circle system).....................................................................................29

Front and back side view on the patient module..........................................................29

Bottom and back side view on the patient module.......................................................30

Functional representations of the patient module........................................................31

Components of the patient module..............................................................................38

Theory of Operation

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

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 CO2 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

3.6.11

3.6.12

3.6.13

3.6.14

3.6.15

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

4.3.4.2

4.3.4.3

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

4.6.2.2

4.6.2.3

4.6.2.4

4.6.2.5

4.6.2.6

Messages during the system tests...........................................................................47

Removing the flow tubes..............................................................................................52

Removing the pressure gauges ...................................................................................53

Removing the Module 2 Circuit Board Set................................................................... 53

Removing Module1 Circuit Board Set..........................................................................53

Removing the Power Supply Module........................................................................... 53

Removing Internal Regulators, Proportional Valve and Flow Divider.......................... 54

Pneumatic tests........................................................................................................62

Alarm Tests...............................................................................................................63

Electrical Tests ......................................................................................................... 65

O2 sensor calibration ................................................................................................79

P1 Pressure sensor calibration................................................................................. 81

P2 Pressure sensor calibration................................................................................. 83

Temperature Sensor Calibration ..............................................................................85

Proportional Valve Calibration..................................................................................87

Internal Flow Sensor Calibration ..............................................................................92

Theory of Operation

4.6.2.7

4.6.2.8

5 Preventive Maintenance................................................................................................................. 99

5.1 6 Month Service Interval .........................................................................................................99

5.2 12 Month Service Interval .....................................................................................................100

5.3 36 Month Service Interval .....................................................................................................100

5.4 Cleaning................................................................................................................................ 101

5.4.1 Cleaning and disinfecting the apparatus .......................................................................101

5.4.2 Cleaning and sterilizing the Patient Module ..................................................................101

5.5 Battery Replacement and Maintenance................................................................................ 101

5.5.1 Battery replacement....................................................................................................... 101

5.5.2 Battery Maintenance......................................................................................................101

6 Order Information .........................................................................................................................103

Characteristic of the Proportional Valve...................................................................94

External Flow Sensor Calibration ............................................................................. 96

Theory of Operation

0.1 Table of Figures

Fig. 1 Line Terminal Block, 120/230VAC Supply .................................................................................15

Fig. 2 Overview electrical components.................................................................................................16

Fig. 3 Power supply module .................................................................................................................17

Fig. 4 Module 1 PC board..................................................................................................................... 21

Fig. 5 View on module 2....................................................................................................................... 23

Fig. 6 Ventilator pneumatic...................................................................................................................26

Fig. 7 Top and backside view on the patient module........................................................................... 29

Fig. 8 Bottom and backside view on the patient module......................................................................30

Fig. 9 Survey of the patient module......................................................................................................31

Fig. 10 Survey of the patient module, CMV mode, inspiration............................................................. 32

Fig. 11 Survey of the patient module, CMV mode, expiration..............................................................33

Fig. 12 Survey of the patient module, Manual mode, inspiration......................................................... 34

Fig. 13 Survey of the patient module, Manual mode, expiration.......................................................... 35

Fig. 14 Survey of the patient module, Spontaneous mode, inspiration................................................36

Fig. 15 Survey of the patient module, Spontaneous mode, expiration ................................................ 37

Fig. 16 Patient module, front view........................................................................................................57

Fig. 17 Patient module, top view ..........................................................................................................58

Fig. 18 Supply inlet filters and water traps ........................................................................................... 59

Fig. 19 Power Supply Board.................................................................................................................61

Fig. 20 Alarm screen ............................................................................................................................63

Fig. 21 O2 Whistle adjustment (appearance may differ due to different configuration options).......... 64

Fig. 22 Initialization screen................................................................................................................... 66

Fig. 23 Key code entry screen..............................................................................................................67

Fig. 24 Main menu screen.................................................................................................................... 68

Fig. 25 Test menu screen.....................................................................................................................69

Fig. 26 Patient Module, motor control screen.......................................................................................70

Fig. 27 Docking station, Start/ Stop switches.......................................................................................71

Fig. 28 Pressure, O2 and Temperature screen ....................................................................................72

Fig. 29 Proportional valve test screen..................................................................................................75

Fig. 30 Drive Gas Outlet....................................................................................................................... 75

Fig. 31 Solenoid Valves MV-1 MV-4 test screen.................................................................................. 76

Fig. 32 Docking Station valve connectors ............................................................................................77

Fig. 33 Power and Heater Control screen............................................................................................78

Fig. 34 O2 Calibration screen ...............................................................................................................79

Fig. 35 P1 Calibration screen ...............................................................................................................81

Fig. 36 P2 Calibration screen ...............................................................................................................83

Fig. 37 Temperature Sensor screen.....................................................................................................85

Fig. 38 Proportional Valve Calibration screen......................................................................................88

Fig. 39 Docking Station, drive gas outlet.............................................................................................. 88

Fig. 40 Pressure Regulator for the Driving Gas with Test Port............................................................ 89

Fig. 41 Adjustment Screw on top of the Flow Divider ..........................................................................91

Fig. 42 Internal Flow Sensor Calibration Screen.................................................................................. 92

Fig. 43 Characteristic of the Proportional Valve screen....................................................................... 94

Fig. 44 External Flow Sensor Calibration screen................................................................................. 96

Fig. 45 How to measure the voltages U1 and U2.................................................................................98

Theory of Operation

1 General Information

1.1 Guidelines

The information in this service manual exclusively refers to servicing and maintenance work of the anesthesia system HEYER Modular+. Please, read from the operator’s manual HEYER Modular+ the service, setting, maintenance and care

of the apparatus, normally carried out by the user. These service instructions are to be used only by a skilled, trained and authorized service staff. The servicemen must be provided with the specified special tools and accessories. This service manual is utilized for business affairs and general customized information. HEYER gives no guarantee when using the information. The service technicians should have read and fully understood the service instructions prior to beginning with their service duties. The functional principles of the apparatuses have also been described in the user’s manual. The user’s manual contains general precautions, which are also of importance to the service technician.

1.2 Product improvements

HEYER reserves the right to improve their products or revise the instructions without prior notice. This manual deals with the status of the anesthesia system HEYER Modular+ at the time of issue.

HEYER is not obliged to retrofit former models subject to improvements and modifications. An

exception to be examined will be made when improvements or modifications due to design and production deviations are influencing the patient’s safety or would entail malfunctioning of the apparatus.

1.3 Manufacturer’s Liability

HEYER can only be held liable for safety, reliability and fail-safe operation of the system, provided

that:

− the system was being operated in conformity with the instructions given by the manufacturer,

− certifications, readjustments, changes, or repairs have been carried out by authorized

personal,

− service and maintenance was being made in conformity with the instructions given by the manufacturer.

− the system was operated in a building with grounding equipment in compliance with the regulations issued by IEC, NFPA, and UL.

In no event will HEYER be liable for any special, incidental, or consequential damages, including loss of profits, whether or not foreseeable and even HEYER has been advised of the possibility of such loss or damage. HEYER disclaims any liability arising from a combination of its product with products from other manufacturers if the combination has not been endorsed by HEYER. Buyer understands that the remedies noted in HEYER's limited warranty are its sole and exclusive remedies.

Theory of Operation

1.4 Manufacturer’s specification

Product: HEYER MODULAR

Manufacturer:

Heyer Medical AG

Carl-Heyer-Strasse 1-3 56130 Bad Ems

Germany Tel. + 49 2603 / 791-3 Fax. +49 2603 / 791-209 E-mail: info@heyermedical.de

1.5 Updating status

State of this service manual: Rev. 2.1.0 of February 2004

Theory of Operation

1.6 Warning, Precautions and Notes

Warnings alert the user to potential serious outcomes (death, injury or serious adverse events) to the

patient or user. Precautions alert the reader to exercise special care necessary for the safe and effective use of the

device

Notes are a general information statement concerning the Modular+ Please read adhere to all warning, precautions and notes listed here and in the appropriate areas

throughout this manual.

1.6.1 Warnings

Warning: The Modular+ anesthesia machine works on line voltage and at high pressure.

Therefore, an electric shock hazard may exist when the instrument covers are removed. Repair and calibration procedures should only be performed by qualified personnel who follow proper servicing techniques. Warnings are given in appropriate locations

Warning: In order to prevent an electrical shock, the machine (protection class I) may only

be connected to a correctly grounded mains connection (socket outlet with grounding contact).

Warning: Possible explosion hazard. Do not operate near flammable substances. Warning: The use of anti-static or electrically conductive breathing tubes, when utilizing

high frequency electric surgery equipment, may cause burns and is therefore not recommended in any application of this machine.

Warning: Possible fire hazard. Fuses (i.e., additional sockets) must only be replaced by

fuses of the same type and with the same rating.

Warning: Possible shock hazard. The machine may only be opened by qualified and

authorized service personnel.

Warning: Compressed gasses are considered Dangerous Goods/hazardous Materials per

I.A.T.A. regulations. It is a violation of international law to offer any package or over pack of dangerous goods for transportation without the package being appropriately identified, packed, marked, classified, labeled and documented according to I.A.T.A. regulations. Please refer to the applicable I.A.T.A Dangerous Goods Regulations for further information.

Warning: Never block airflow at the drive gas outlet. Blocking the drive gas outlet raises

internal pressures above specified limits and will result in permanent damage to internal sensors.

Theory of Operation

1.6.2 Precautions

Caution: Refer to the maintenance intervals in the Preventive Maintenance section for

guidance on which steps are preformed when.

Caution: Use surgical gloves whenever touching or disassembling valves or other

internal components of the Patient Module.

Caution: If possible, always connect the output of the APL valve to the anesthetic

removal line, usually installed in the operation theater.

Caution: Carry out the daily checks specified on the checklist and do not operate the

system in case of a fault until the fault has been repaired.

Caution: The patient should be visually monitored by qualified personnel. In certain

situations circumstances may occur which may not necessarily trigger an alarm.

Caution: Always set the alarm limits so that the alarm is triggered before a hazardous

situation occurs. Incorrectly set alarm limits may result in operation personnel

not being aware of changes in the patient’s condition. Caution: This machine must only be operated by trained, skilled medical staff. Caution: Before starting the machine, the operating personnel must be familiar with

operating instructions and must have been instructed by a qualified instructor. Caution: If the machine does not function as described, the machine must be examined

and possibly repaired by qualified service personnel, before being returned to

use. Caution: Handle the machine with care to prevent damage or functional faults. Caution: Ensure that the gas supply of the machine always complies with the technical

specification. Caution: Before clinical use, the machine must be correctly calibrated and/or the

respective machine tests performed, as described in the operation instructions. Caution: If the machine should show faults during the initial calibration or testing, the

machine should not be operated until the fault has been repaired by a qualified

service technician. Caution: After servicing, functional, sensor and system tests must be carried out before

clinical use. Caution: Only bacteria filters with a low flow resistance must be connected to the patient

module and/or patient connector. Caution: Failure to connect device to a grounded mains outlet may elevate leakage

current in excess of permissible values. Caution: During transportation of the patient module, transportation should be applied to

the rear to protect the valve connectors. Caution: After changing the CO2 absorbent, carry out a system leak test. Caution: The spring in the top of the APL valve may not be stressed. After removal, place

to one side, taking care that the spring is not unduly loaded.

Theory of Operation

Caution: Only Selectatec™ compatible vaporizers with interlock system may be used

with the Modular+ unit. Caution: After each exchange of a vaporizer, carry out a system leak test. Caution: Use cleaning agent sparingly. Excess fluid could enter the machine causing

damage. Caution: The patient dome of the bellows system cannot be autoclaved. It is not in

contact with the ventilation gas. If soiled, the patient dome should be cleaned

with water and liquid cleaning agent. The unit can be disinfected with a standard

surface-disinfecting agent. Do not use alcohol. Caution: Do not clean the machine while it is on and/or plugged in. Caution: Pressing Quit at any time during the calibration procedure will cancel the

session’s settings and reload the previously stored calibration coefficients.

1.6.3 Notes

Note: Unauthorized servicing may void the remainder of the warranty. Check with the

factory or with a local authorized HEYER dealer to determine the warranty status

of a particular instrument.

Theory of Operation

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Repair Information

2 Theory of Operation

The anesthesia system HEYER MODULAR+ represents a flexible employable workstation to apply and monitor anesthesia inhalation in semi-closed and almost closed circuits in low flow techniques for minimized consumption of gas and anesthetics.

The basic model Modular+ includes the following components:

2.1 Microprocessor-Controlled Ventilator

The Microprocessor-controlled ventilator allows with its dedicated patient module time-controlled, pressure limited, and a constant volume controlled ventilation for all patient groups of a body weight of 3 kg upwards. The system compliance of the patient module and respiratory tubes are automatically compensated by the ventilator. Low tidal volumes, therefore, can be dosed very accurately. Thanks to the different ventilation modes, a ventilation is feasible, even in case of complicated lung conditions. A comprehensive test and alarm management system prevents uncontrollable operating conditions and therefore provides the patient a high safety standard. The ergonomically designed control surface allows an easy operation of the ventilator. The display informs about the selected ventilation parameters and the measured values for volume, pressure, FiO2 and shows real time curves of the expiratory flow and airway pressure.

2.2 Patient Module

The patient circuit is integrated in a compact aluminum block. This block is brought to a moderate temperature to avoid the formation of water vapor. In additional, it includes a controlled emergency valve, a reservoir in form of a manual respiratory bag and an expiratory flow sensor. The patient module is automatically connected to the basic unit through a motor drive. A threaded shaft pulls the block toward the basic unit, and all connections to the docking block are checked in the compliance- and leak tests.

2.3 Gas Conditioning Unit

The flow meter block features all the necessary safety facilities, such as O2 pressure loss alarm and N2O shut-off. An integrated pneumatically controlled system provides a minimum of 25% oxygen concentration in the fresh gas flow at all flow settings (ratio system).

2.4 The Ventilator Unit

The microprocessor-controlled ventilator allows time-controlled, volume-constant and pressure-limited (CMV) or pressure targeted (PCV) artificial respiration without assisted or synchronized control functions. The system also allows manual respiration as well as spontaneous respiration of the patient. Adjustable PEEP, breathing time ratios (I:E) and pressure sustaining plateau functions are available. Volume-constant respiration is effected by the time control of the respirator and the fresh gas decoupling of the patient module. The ventilator computes the inspiratory flow required for the settings tidal volume (VT), respiratory rate and the ventilation time ratio (I:E). The resultant tidal volume (VT) is delivered to the patient at high accuracy

2.5 Adjustable Alarms

Minimum and maximum alarm limit settings are available for Peak Pressure, Mean Pressure and FiO2 minimum alarm settings are available for tidal volume and minute volume.

Repair Information

2.5.1 P

limiting on alarm violation

max

Exceeding the P from exceeding the high alarm setting. In the CMV mode, the setting of the P

alarm limit automatically halts the inspiratory phase preventing airway pressure

max

peak pressure

max

provides pressure limitation. When reaching this pressure limit, a warning (alarm) “Peak greater than P

” is displayed, and the inspiration is discontinued. The next inspiration is at a regular time interval,

max

the time control of the respiratory unit does not increase the respiratory rate. The result is a decrease of the tidal volume “VT” and minute volume “M Vol.”. The respirator responses to pressure limitation through displaying the P

alarm constantly.

max

2.6 Fresh Gas Decoupling

The tidal volume (VT) is adjusted independently of the adjusted fresh gas flow. This is achieved by fresh gas decoupling. In inspiratory procedure the fresh gas flow is uncoupled by the decoupling and expiratory diaphragm valves from the internal subsystem of the patient module. Fresh gas either is filling the manual respiration bag (reservoir) or is led into the scavenging through the airway pressure relief valve.

2.7 Compliance compensation

The tidal volume (VT) is automatically corrected in response to the compliance of the patient module and patient tubes. Volume reduction due to system compliance is compensated as a result of this.

Repair Information

receptacles

2.8 Electrical supply

The line cord of the Modular+ is connected to an internal terminal block. Directly connected to this terminal are convenience receptacles and the unit itself. Line supply to the receptacles is available with the line cord connected. Line supply for the unit is switched by the main switch at the right side of the unit. The two pole switched power supply is protected by each one 5A circuit breaker. The switched line supply is connected to the AC IN connector on power supply board AVM 2-1. Another third pole of the main switch is connected via the terminal to the board AVM 2-1 (X5:5,6), enabling to detect a main switch OFF position or missing line supply.

Line cord

N 120/230 V

L 120/230 V

X5 pin 6

X5 pin 5

X5 pin 4

X5 pin 3

power supply board

int. ground

wiring

Circuit breakers ventilator

Main switch

Power supply board

5 A

1 1

3 4

Circuit breaker 5 A

battery

Convenience

Fig. 1 Line Terminal Block, 120/230VAC Supply

The 120 V configuration has

additional circuit breakers

2.8.1 Electrical components

RS 232

interface

Option 1

RS 232 interface

Option 2

Repair Information

RS 232

interface

module 1

flow meter

backlight

transformer

battery

motor

power supply

module 1

Communication

RS 232

interface

Display

Controller

module 1

Display

module 1

main switch

module 2

AVM 3-1

Supervisor

Touch Screen

PT 100

heat

blanket

I²C

fan

oxygen sensor

proportional

valve

Fig. 2 Overview electrical components

interface

module 2

AVM 3-2

Ventilation

solenoid valve

ext. flow

sensor

int. flow

sensor

Repair Information

2.9 Power supply module

The power supply module is located in the frame behind the drawers. This module serves for the voltage supply of the ventilator modules 1 and 2, the flow meter block illumination, the patient circuit heating blanket and the charging / discharging control for the battery. The power supply board allows the supply with either 230VAC or 115VAC, the supply voltage can be selected with a switch on the

power supply board.

Fig. 3 Power supply module

Repair Information

2.9.1 Connectors on power supply board AVM 2-1

Connector connected to Pin. def. Func. / Signal Color / No.

X1 Module 1 X1-1 +5V yellow X1-2 GND red X1-3 GND green X1-4 +12V blue

Connector connected to Pin. def. Func. / Signal Color / No.

X2 X2-1 +5V X2-2 GND X2-3 GND X2-4 +12V

Connector connected to Pin. def. Func. / Signal Color / No.

X3 X2-1 - X2-2 - X2-3 GND X2-4 +12V

Connector connected to Pin. def. Func. / Signal Color / No.

X4 X4-1 +5V X4-2 GND X4-3 GND X4-4 +12V

Connector connected to Pin. def. Func. / Signal Color / No.

X5 Battery, X5-1 BATT+ brown Fuse for Battery X5-2 BATT- black Main switch X5-3 Cir.break. bat. black 6 X5-4 Cir.break. bat. black 5 X5-5 Main switch black 4 X5-6 Main switch. black 3

Connector connected to Pin. def. Func. / Signal Color wire isolat.

X6 Transformer X6-1 sec.IIa 15VAC blue RT110/12 secondary X6-2 sec IIa green

X6-3 sec. IIb 15VAC blue X6-4 sec IIb green

Connector connected to Pin. def. Func. / Signal Color wire isolat.

X7 Transformer X7-1 prim.I, L120/230V RT110/12 primary X7-2 prim.I, N120/230V X7-3 prim.II,L120/230V X7-4 prim. II, . violet

Connector connected to Pin. def. Func. / Signal Col. wire isolat.

X11 Transformer X11-1 Sec.Ia 22VAC red RT110/22 secondary X11-2 Sec Ia yellow

X11-3 Sec. Ib 22VAC red X11-4 Sec Ib yellow

black/ orange white

Repair Information

Connector connected to Pin. def. Func. / Signal Color / No.

X12 int. connection X12-1 AC, N 110V/230V blue AC IN terminal X12-2 AC , L 110V/230V black

Connector connected to Pin. def. Func. / Signal Color / No.

X13 Module 2 X13-1 +12V red Board X13-2 GND blue AVM 3-2 X13-3 +5V(1) red X13-4 GND blue

Connector connected to Pin. def. Func. / Signal Color / No.

X14 Module 2 X14-1 +5V(2) red Board X14-2 GND blue AVM 3-2 X14-3 -12V red X14-4 GND blue

Connector connected to Pin. def. Func. / Signal Color / No.

X15 Module 2 X15-1 Control Sign. white Board X15-2 Control Sign. white AVM 3-2 X15-3 Control Sign. white X15-4 Control Sign. white

Connector connected to Pin. def. Func. / Signal Color / No.

X16 Module 2 X16-1 GND blue AVM 3-2 X16-2 +31V red

Connector connected to Pin. def. Func. / Signal Color / No.

X17 solid state relay X17-1 22VAC to heat. bl. black heating blanket X17-2 22VAC to relay black X17-3 + Control voltage black X17-4 GND black

Connector connected to Pin. def. Func. / Signal Color / No.

X22 DC-AC convert. X22-1 +supply voltage red for flow meter X22-2 - illumination X22-3 - X22-4 GND black

2.9.2 Fuses on power supply board AVM 2-1

Fuse No. Fuse value Fuse protects F1 4 A MT, medium slow-blow DC / DC-converter +5V F7 8 A M, medium -blow DC / DC-converter +12V F8 8 A M, medium -blow Transformer, Sec. IIa F9 8 A M, medium -blow Transformer, Sec. IIb F10 10 A T, slow-blow Transformer, Sec. Ia F11 10 A T, slow-blow Transformer, Sec. Ib

Repair Information

2.9.3 Charging / discharging control for the battery:

The charging / discharging control for the battery is also located on the power supply board AVM 2-1. Status indicators as red, green and yellow LEDs are located on the board to show functions like check or charging of the battery.

2.9.4 Status Indicators Of Battery Control:

LED LED light Battery status

LED yellow (V28) continuous charging LED yellow (V28) flashing check LED green (V37) continuous fully charged LED red (V38) flashing or continuous. defect

Repair Information

2.10 Module 1

Ventilator module 1 consists of two processor boards. This module serves for the operation of touch screen interface with different menus displayed on the display. All safety functions, e.g. the complete ventilator control, are located on ventilator module 2. Module 1 is connected to module 2 by means of an RS 232C- interface. Module 1 serves to give the functions for parameter and alarm settings to module 2. Module 2 sends the measured parameters or generated alarm signals to module 1 to display.

Fig. 4 Module 1 PC board

Repair Information

2.10.1 Connectors on module 1

Connector connected to Plug conf. Func. / Signal

X4 Module 2 10 pole communication with module 2

Connector connected to Plug conf. Func. / Signal

X5 EL Display 20 pole Connected to the

display

Connector connected to Plug conf. Func. / Signal

X6 Power supply 4 pole Power suppy

Connector connected to Plug conf. Func. / Signal

X7 Touch screen 32 pole communication with touch screen

Connector connected to Plug conf. Func. / Signal

X8 Module 2 14 pole communication with module 2

Connector connected to Plug conf. Func. / Signal

X9 Module 2 28 pole communication with module 2

Connector connected to Plug conf. Func. / Signal

X10 Selector switch 14 pole communication With the selector

switch

Connector connected to Plug conf. Func. / Signal

X19 LCD Display Flat cable

connector

Connector connected to Plug conf. Func. / Signal

X20 (on the backside)

Display illumination

4 pole Power supply

Connected to the display

display illumination

Repair Information

2.11 Ventilator Module 2, AVM 3-1 and AVM 3-2

Ventilator module 2 serves for the active ventilator control. Module 2 consists of two CPU boards, the CPU board AVM3-1 with µP1 serves for a continuous validation of control actions generated by CPU board AVM3-2 and for the communication between module 2 and module 1. The CPU board AVM3-2 with µP2 generates all active control signals, after a validation of these signals by µP1, AVM3-2 is enabled to operate the different active elements like the solenoid vales and proportional valve.

Keyboard Alarm Panel

RS232

X3X2

CPU-board

X10

X11

AVM 3-2

P11 P10

R33

Pressure Sensor #2

Pressure Sensor #1

P2P1

GND

456

CPU-board AVM 3-1

X13

GND

V29

V30

V38

V19

AVM 3-1 Software

+12 GND

GND

+5(1)

X15

GND

+5(2)

Power Supply

-12

Fig. 5 View on module 2

DIS/AC

HTON

BATT

+31

X16

swrtrs wsswge

Motor

(-) (+) -> lösen

Endsch.

Start

X11

Repair Information

2.11.1 Parts list module 2

Pos. No. Description Order No. 1 Ventilator module 2, complete 460-1150

2.11.2 Connectors on module 2

2.11.2.1 Plug connectors on board AVM 3-1

Connector connected to Plug conf. Func. / Signal

X2 Module 1 28 pole communication with module 1

Connector connected to Plug conf. Func. / Signal

X3 Module 1 14 pole communication with module 1

Connector connected to Plug conf. Func. / Signal

X4 Module 1 10 pole communication with module 1

Connector connected to Pin. def. Func. / Signal Color / No.

X7 PT-100 sensor X7-1 temperature dep. blue X7-2 resistance red

Connector connected to Pin. def. Func. / Signal Color / No.

X9 Fan ventilator X9-1 +12V red FAN pneumatic X9-2 fan control signal yellow module X9-3 n.c. X9-4 n.c. X9-5 GND black

Connector connected to Pin. def. Func. / Signal Color / No.

X10 Driving gas X10-1 +12V white Driving gas switch switch to detect X10-2 GND brown a failure of the gas X10-3 n.c. supply X10-4 n.c. X10-5 n.c.

Connector connected to Pin. def. Func. / Signal Color / No.

X11 over temperature X11-1 22VAC when red HTSEC switch (NC) X11-2 switch is open blue

patient X11-3 n.c. block heating X11-4 n.c. X11-5 n.c.

Repair Information

2.11.2.2 Plug connectors on board AVM3-2

Connector connected to Pin. def. Func. / Signal Color / No. X5 internal X5-1 signal (+1-5 V) orange IF flow sensor X5-2 +10V mint X5-3 GND. violet X5-4 n. c. X5-5 n. c.

Connector connected to Pin. def. Func. / Signal Color / No. X7 external X7-1 flow dep. signal. red EF flow sensor X7-2 n.c. X7-3 n.c. X7-4 n.c.

X7-5 flow dep. signal. blue

Connector connected to Pin. def. Func. / Signal Color / No. X8 Oxygen cell X8-1 n. c. O2 X8-2 + voltage fuel cell red X8-3 - voltage fuel cell blue X8-4 n.c. X8-5 n.c.

Connector connected to Pin. def. Func. / Signal Color / No. X3 proportional X3-1 + 12V blue PV valve X3-2 n. c. X3-3 control volt. 0-5V gray X3-4 n.c. X3-5 GND green

Connector connected to Pin. def. Func. / Signal Color / No. X11 solenoid X11-1 GND ( MV4) brown / 1 valve X11-2 + 10V (MV4) red / 2 block X11-3 GND (MV3) orange / 3 X11-4 + 10V (MV3) yellow / 4 X11-5 GND (MV1) green /5 X11-6 + 10V (MV1) blue / 6 X11-7 GND (MV2) violet / 7 X11-8 + 10V (MV2) gray / 8

2.12 Display

The display of the ventilator is a LCD or EL type. It is connected to the module 1.

2.13 Battery

The battery is a maintenance free seal lead acid type. The recharging time is a maximum of 7 hours with a fully depleted battery. The backup time is about 30 minutes with a fully charged battery. To prevent unintended loss of battery operation, it is recommended to replace it with a new HEYER battery every 3 years.

2.14 Ventilator pneumatic

Repair Information

Fig. 6 Ventilator pneumatic

Repair Information

2.14.1 Ventilator pneumatic drive

Air or Oxygen, in the CMV mode, serves as driving gas for the ventilator. In addition to the flow meter block, a pressure reducer, reducing the supply pressure to 200 kPa (2 bar; 29 PSI), is supplied by the Air or oxygen connection. This pressure represents the high system pressure of the ventilator. The pressure reducer is named HP pressure reducer. The HP pressure reducer is placed ahead of the proportional valve that generates the driving gas flow during the inspiratory phase. This flow is led through the flow divider and fills the bellows dome that surrounds the silicone bellow. In response to the inspiratory and expiratory phases of a respiration cycle, the pneumatic valves (diaphragm valves) of the patient module are activated by solenoid valves. These solenoid valves, MV1, MV3, and MV2 are supplied by a second pressure reducer assembly (LP- double stage pressure reducer) at the low system pressure, together with MV4, with about 20 kPa (200 mbar; 2.9 PSI)// 25 kPa (250 mbar; 3,63PSI). Cyclic activation of the proportional valve and solenoid valves is steered by the processors of module 2 according to the parameters set on the control panel of the ventilator. A description of the individual components will be found in the following chapters:

2.14.2 HP pressure reducer

The HP pressure reducer serves for a stabilization of the supply pressure for the proportional valve. The flow generated by the proportional valve thus becomes independent of pressure variations. The setting of the HP pressure reducer (200 kPa (2 bar; 29 PSI)) at the same time determines the maximum inspiratory flow of 75 +0/-4 L/min with respect to the respirator.

2.14.3 LP- double stage pressure reducer

This pressure reducer assembly is supplied with oxygen in parallel to the measuring tube block or ratio system, respectively. It reduces the input pressure to 20 kPa (200 mbar; 2.9 PSI)// 25 kPa (250 mbar; 3,63PSI), and is connected to the solenoid valve bank.

2.14.4 Solenoid valves MV1 to MV4

The solenoid valves MV1, MV2, MV3 and MV4 are mounted on a bank behind the patient module docking station to which the tubes to the docking station of the patient module and the LP- double stage pressure reducer are connected.

MV1: This solenoid valve activates, in the CMV mode, the valve for closing the outlet of the bellows dome (bellows control valve) through the line 5, when driving gas flows in for inspiration. It is supplied by the LP- double stage pressure reducer.

MV2: This solenoid valve activates, in the CMV mode, the valve closing the expiratory channel of the patient module (expiratory valve), via MV2 through the line 1. It is supplied by the LP- double stage pressure reducer via MV4.

MV3: This solenoid valve activates, in the CMV mode, the valve for the fresh gas decoupling (decoupling valve) through the line 6. It is supplied by the LP- double stage pressure reducer.

MV4: This solenoid valve is used for internal supply of MV2 with pressure of the LP- reducer.

Repair Information

2.14.5 Pneumatic driving module

The driving module consists of the proportional valve and flow divider with an internal flow sensor. The proportional valve supplied by the HP pressure reducer generates a driving gas flow of 0-75 l/min in relation to the control voltage of the proportional valve of 0 - 5VDC.

The control voltage of the PV, required for the pre-selected parameter settings, is generated by the CPU board AVM 3-2. The driving gas flow Q

drive gas

VT = generated tidal volume Ti = Inspiratory time

= VT/Ti with Q

drive gas

is in the following in relationship with the tidal volume:

drive gas

= driving gas flow

2.14.6 Flow metering module

The flow metering module attached to the proportional valve consists of a flow sensor with a measuring range of 0 - 1 l/min and a flow divider. The flow divider splits the total flow in a ratio of 79: 1, and the bypass flow is lead to the flow sensor. A closed loop that allows high accuracy and back up in the generation of the tidal volume results from this configuration via the module 2 CPU-boards.

2.14.7 Tube color coding

Despite the local color coding system, all the pneumatic tubes inside the apparatus will be according to the coding label inside the unit, if it is not according to the local color coding system, next to the flow meter block. Typically it will be according to one of the follow standards.

Gas ISO 32 Standard US standard

O2 White Green N2O Blue Blue AIR Black/White Yellow

On the outside of the apparatus, the coding will be as ordered.

Repair Information

2.15 The patient module (circle system)

2.15.1 Top and back side view on the patient module

1 2 3 4

6 5 12 15 8 9 10 11 13 14 7 7

Fig. 7 Top and backside view on the patient module Pos. Description

1. Expiratory valve (passive)

2. Airway pressure limiting valve (APL)

3. Inspiratory valve (passive)

4. Room air valve, emergency air valve

5. Connector of expiratory flow sensor

6. Connectors of power supply heating blanket

7. Bores for guiding pins of connecting block

8. Expiratory valve (active)

9. Port for pressure measurement

10. Port for expiratory valve activation in the manual mode

11. Port for driving gas

12. Locking bolt

13. Bellows diaphragm valve

14. Decoupling diaphragm valve

15. Port for fresh gas

Repair Information

1 2

2.15.2 Bottom and back side view on the patient module

Fig. 8 Bottom and backside view on the patient module Pos. Description

1 2 3 4 5 6 7 8

Fixing screws for locking bolt Exhaust for driving gas Driving gas in- and outlet to bellows dome Thread for CO2 absorber canister fixing, outlet from patient module to absorber Inlet for re-breathing gas from absorber to patient module Connector for bellows Inlet for ambient air valve / emergency air valve Port for anesthetic gas scavenging tube (30 mm cone)

Repair Information

2.15.3 Functional representations of the patient module

gasmonitoring

Fig. 9 Survey of the patient module

Pos. Description

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Patient's y-piece Side stream gas monitor Inspiratory bacterial filter Expiratory bacterial filter Airway pressure monitor connection Inspiratory valve (passive) Expiratory valve (passive) Spirometry sensor Airway pressure limiting valve (APL) Waste gas outlet Expiratory valve Room air valve, emergency air valve Ventilator control pneumatic CO2 absorber Bellows Decoupling valve Bellows dome Bellows valve Reservoir / manual ventilation bag

2.15.3.1 CMV mode, inspiration

gas monitoring

Repair Information

expiratory valve

is > 2 mbar

MV3 ="1" MV2 ="1"

decoupling valve

bellows valvewhen reservoir pressure

Fig. 10 Survey of the patient module, CMV mode, inspiration

MV4 ="1" MV1 ="1"

2.15.3.2 CMV mode, expiration

gas monitoring

Repair Information

expiratory valve

when reservoir pressure is > 2 mbar

MV3 ="0" MV2 ="0"

MV4 ="0"

decoupling valve

bellows valve

Fig. 11 Survey of the patient module, CMV mode, expiration

MV1 ="0"

2.15.3.3 Manual mode, inspiration

gas monitoring

Repair Information

expiratory valve

when the set respiratory pressure is attained

MV3 ="0" MV2 ="0"

MV4 ="0" MV1 ="0"

Fig. 12 Survey of the patient module, Manual mode, inspiration

decoupling valve

bellows valve

2.15.3.4 Manual mode, expiration

gas monitoring

expiratory valve

Repair Information

decoupling valve

MV3 ="0" MV2 ="0" MV4 ="0"

MV1 ="0"

Fig. 13 Survey of the patient module, Manual mode, expiration

bellows valve

Repair Information

2.15.3.5 Spontaneous mode, inspiration

gas monitoring

emergency air valve opens at p < - 3 mbar

expiratory valve

decoupling valve

when reservoir pressure

is > 2 mbar

MV3 ="0" MV2 ="0"

MV4 ="0" MV1 ="0"

Fig. 14 Survey of the patient module, Spontaneous mode, inspiration

bellows valve

Repair Information

2.15.3.6 Spontaneous mode, expiration

gas monitoring

expiratory valve

decoupling valve

waste gas

MV3 ="0" MV2 ="0" MV4 ="0" MV1 ="0"

Fig. 15 Survey of the patient module, Spontaneous mode, expiration

bellows valve

Repair Information

2.15.4 Components of the patient module

2.15.4.1 Ventilation bellows system

The ventilator’s driving system can be characterized as a constant flow generator. The driving gas of this generator fills the bellows dome to compress the bellows. The breathing gas is pressed out of the bellows into the circuit. Due to the weight of the descending bellows, it is self-filling when the driving gas flow is stopped. The bellows control valve enables the escape of the driving gas.

2.15.4.2 Manual Respiration Bag / Reservoir

In the manual mode this device acts as a normal breathing bag, enabling the user to ventilate the patient manually. In CMV mode this bag acts as a reservoir for fresh gas in the inspiration phase. In the expiratory phase the re-breathing gas and the fresh gas are accumulated in this reservoir. The bag’s in- and deflation corresponds to the volume balance of the breathing circuit and the patient. When a volume loss occurs, the bag deflates breath by breath and finally collapses. Such a collapsing breathing bag is an indicator for a leakage. The breathing bag must collapse if the fresh gas flow, reduced by the patient’s uptake, is not able to compensate the leakage.

2.15.4.3 CO2 absorber

The soda lime inside the absorber retains the carbon dioxide from the re-breathing gas. The flow orientation is upstream.

2.15.4.4 Inspiratory and expiratory valves

To ensure the gas flow direction the two one-way-valves in the inspiratory limb and expiratory limb are integrated inside the patient module. These valves are seen activating form the top of the module.

2.15.4.5 Airway pressure relief valve

In CMV position the APL valve closes the re-breathing system towards the scavenging line and limits the reservoir pressure to a constant value of 2 cmH2O. In manual mode the APL valve acts as a normal spring loaded pressure relief valve, limiting the maximum pressure in the re-breathing system.

2.15.4.6 Room Air valve

Due to the tendency of the descending bellows to refill itself by creating a negative pressure inside the bellows this valve prevents the patient from becoming any negative pressure by opening the diaphragm and allowing ambient air to refill the bellows.

2.15.4.7 Diaphragm/Membrane valves

Inside the patient module valves operate the expiratory line, the bellows dome outlet and the fresh gas decoupling line during the CMV-mode. These valves are controlled by pressured gas to open or close the valve’s path. All valves are open when not inflated. The power gas for these valves is controlled by the ventilator’s valve bank using a supply pressure of about 20 kPa (200 mbar; 2.9 PSI)// 25 kPa (250 mbar; 3,63PSI) from the ventilator pneumatic.

Repair Information

2.15.2.7.1 Status of the diaphragm/membrane valves:

The diaphragm valves are pneumatically operated by solenoid valves. The following list shows the correspondence between diaphragm valve, solenoid valve and pressure port.

Valve Bellows valve Exp. valve Decoupling valve

controlled by MV 1 MV 2 MV 4 MV 3 connected to port # 5 1 3 6 wire # 5, 6 7, 8 1, 2 3, 4

In the following the status of the diaphragm/membrane valves are shown corresponding to the selected ventilation mode of the ventilator.

2.15.2.7.2 Machine OFF or Ventilator In Standby

Valve MV 1 MV 2 MV 3 MV 4

Activity OFF OFF OFF OFF Pressure on port 5, No 1, No 6, No no sup. of MV2

2.15.2.7.3 Manual / Spontaneous Mode, INSPIRATION and EXPIRATION

Valve MV 1 MV 2 MV 3 MV 4

Activity OFF OFF OFF OFF Pressure on port 5, No 1, No 6, No no sup. of MV 2

2.15.2.7.4 CMV Child / Adult Mode, INSPIRATION

Valve MV 1 MV 2 MV 3 MV 4

Activity ON ON ON ON Pressure on port 5, Yes 1, Yes 6, Yes supply of MV 2

2.15.2.7.5 CMV Child / Adult, EXPIRATION

Valve MV 1 MV 2 MV 3 MV 4

Activity OFF OFF OFF OFF Pressure on port 5, No 1, No 6, No no sup. of MV 2

2.15.2.7.6 CMV Adult, EXPIRATION and PEEP

Valve MV 1 MV2 MV3 MV4

Activity OFF ON OFF ON Pressure on port 5, No 1, Yes 6, No supply of MV2

Repair Information

2.15.2.7.7 Compliance Test Patient Module

The compliance test patient module is divided in 3 phases. Phase 1. Flow into the re-breathing system and test of flow sensors.

Valve MV 1 MV2 MV3 MV4

Activity ON OFF ON ON Pressure on port 5, Yes 1, No 6, Yes no sup. of MV2

Phase 2. Pressure increase up to test pressure 40 cmH2O, calculation of system compliance.

Valve MV 1 MV2 MV3 MV4

Activity ON ON ON ON Pressure on port 5, Yes 1, Yes 6, Yes supply of MV2

Phase 3. Test of pressure loss.

Valve MV 1 MV2 MV3 MV4

Activity ON ON ON ON Pressure on port 5, Yes 1, Yes 6, Yes supply of MV2

2.15.2.7.8 Leak Test Patient Module and Fresh Gas Module

Valve MV 1 MV2 MV3 MV4

Activity ON OFF OFF OFF Pressure on port 5, Yes 1, No 6, No no sup. of MV2

Maintenance and Calibration

3 Repair Information

3.1 Introduction

This chapter of the service manual provides the necessary technical information to perform repairs to the instrument. The most important perquisites for effective troubleshooting are a trough understanding of the instruments functions, as well as understanding the principals of operation.

3.2 Warnings and precautions

In the event the instrument covers are removed, observe the following warnings and guidelines

3.2.1 Precautions

1. Do not short components leads together

2. The instrument covers must not be removed by anyone other than qualified technical personnel

who have received supplementary instructions regarding maintenance of medical equipment and/or have equivalent experience in this area.

3.2.2 Warnings

1. This device operates using compressed gas at high pressures. When attaching emergency gas

tanks, always open tank valves slowly, watching the cylinder gauge indicate the tank pressure. When disconnecting the tanks, always close the valves slowly. Use the Modular+ flow meters to

bleed down the pressure, watching the cylinder gauge indicating the depleting tank pressure, before disconnecting the tank from the yoke. Always open and close tank valves fully.

2. This device operates using compressed gas at high pressures from the hospital central supply.

When connecting gas supply lines, attach the hose connection to the machine before connecting the quick disconnect fitting to the hospital source. Disconnect the supply hose from the hospital

source connection prior to disconnecting it from the Modular+ gas connection fittings.

3. Whenever flowing anesthetic gases, nitrous oxide, oxygen, or any hospital gas always use the

appropriate agent evacuation system.

4. Never oil or grease any oxygen equipment unless the lubricant used is made and approved for

this kind of service. In general, oils and greases oxidize readily, and in the presence of oxygen burn violently.

Maintenance and Calibration

3.3 Troubleshooting Guidelines

1. Identify the problem – Due to the wide variety of potential symptoms, certain problems may be

more subtle than others. Following the guidelines of the tests will help determine the problem if one exists.

2. Avoid shorting component leads together – During repair procedures, it can be tempting to

make a quick series of measurements. Always turn the power off before connecting and disconnecting the test leads and probes. The accidental shorting of leads can easily stress the components and cause a second failure (aside from the safety risk).

3. Use the proper equipment – The equipment listed below is suggested to fulfill a wide range of

troubleshooting requirements. It is imperative to use the designated equipment in order to ensure proper results of any and all test procedures.

4. Clean up the repair area – After any repair, clean off the repair area.

3.4 Troubleshooting Charts

3.4.1 Error Messages during ventilation

Display message Cause Corrective action User

Vent Error: Use Manual Ventilation Call Service

CPU Error: Use Manual Ventilation Call Service

Set APL valve to CMV/SP position

Flow Error: Use Manual Ventilation Call Service

Valve Error: Use Manual Ventilation Call Service

No communication between AVM 3-1 and AVM 3-2 (ventilator microprocessor boards) for more than 8 sec.  No communication between AVM 3-1 and module 1 (user interface) for more than 20 sec.

 System Failure (Module 1)  Watchdog Error (Module

2) AVM3-2

PPEAK is greater than 10 mbar and lowest expiration pressure after the expiration still greater than PPEAK–2mbar  No pressure relief in the expiration CMV, PCV After the first five breaths in CHILD resp. after the first three breaths ADULT: Last inspiratory flow is lower than 0,05 L/min, even though more than 2.00 L/min were set at the prop. valve Sensor does not deliver any values AVM3-2 CMV The internal actual flow value is measured during the inspiration and may not exceed the following desired value x factor

1.5: AVM3-2 PCV

The same as CMV, but other tolerance

Prop. Valve faulty

Finish the case with manual ventilation; Take the machine out of use; Call Service Finish the case with manual ventilation; Take the machine out of use; Call Service

Set APL to the CMV/SP position Reset automatically after pressure relief, Restart of the ventilation after request.

Finish the case with manual ventilation; Take the machine out of use; Call Service

The intermitting tone is reset via the mute button (acknowledgement) Reset the error message via the compliance test

Corrective action

Service technician

Exchange module 2 (ventilator microprocessor boards)

Exchange either the module 2, the module 1 or the communication cable connecting the two modules

If resetting the APL valve does not solve the problem, check the correct functions of the APL valve, solenoid valves and the diaphragm valves

Recalibrate the proportional valve, internal flow sensor and the characteristic of the proportional valve. If that does not solve the problem, exchange the

1. proportional valve

2. internal flow sensor

Recalibrate the proportional valve, internal flow sensor and the characteristic of the proportional valve. If that does not solve the problem, exchange the

1. proportional valve

2. internal flow sensor

Maintenance and Calibration

Display message Cause Corrective action User

Valve Error: Use Manual Ventilation Call Service

Calibrate Breathing System Perform Compliance Test when convenient Pressure Reading out of tolerance Perform Compliance Test when convenient No drive gas; please check

Flow/Volume Readings not available Replace Flow Sensor – Call Service A P N E A

Breathing Circuit Disconnect

PEEP greater than Pmin

FiO2 lower than FiO2 min

Tidal Volume lower than VTE

Peak pressure greater than alarm limit

Peak pressure below alarm limit

Minute Volume below alarm limit

PEEP greater than PEEP-Setting

FiO2 greater than FiO2 alarm limit

Check Vent Dial position

AVM3-2 CMV/ PCV The actual internal flow value

should be 0 during expiration

AVM3-2 CMV, PCV Difference between the set and the detected state of each solenoid valve for more than 200 ms AVM3-1, AVM3-2 A difference between the two pressure sensors of more than 10 mbar

AVM3-1 Monitoring of the pressure switch for the driving gas

AVM3-1 during ventilation External flow sensor is broken

or short-circuited AVM3-1. Manual/ spontaneous

Within a period of 15 to 60 seconds a expiration cannot be detected AVM3-1 CMV, (S)CMV, PCV The peak pressure PPEAK is lower than 0.5 mbar and lower then the set pressure limit Pmin AVM3-1 CMV, (S)CMV, PCV The end expiratory pressure is greater than the set pressure limit Pmin AVM3-1 The measured O2 value is lower than the set O2min limit AVM3-1 The measured VTE value is lower than the set VTEmin limit AVM3-1 The measured Ppeak value is greater than or equal to the set Pmax limit AVM3-1 The measured Ppeak value is lower than the set Pmin limit AVM3-1 The calculated M.Vol value is lower than the set M.Vol min limit AVM3-1 The measured PEEP value is 5 mbar higher than the set PEEP AVM3-1 The measured FiO2 value is greater than the set FiO2max limit AVM3-1 The selector switch position is monitored An invalid position must be eliminated within two seconds. After this the alarm message appears.

Finish the case with manual ventilation; Take the machine out of use; Call Service

The intermitting tone is reset via the mute button (acknowledgement) Reset the error message via the compliance test The intermitting tone is reset via the mute button (acknowledgement) Reset the error message via the compliance test Ensure the driving gas supply, restart the ventilation on request.

The intermitting tone is reset via the mute button (acknowledgement) Reset the error message via the compliance test Create expiration Ensure the correct function of

Create a pressure increase in the inspiration phase

Lower the end expiratory pressure or raise the pressure limit Pmin

Increase the O2 value or raise the limit O2min

Increase the VTE value or raise the limit VTEmin

Decrease the Ppeak value or raise the limit Pmax

Increase the Ppeak value or lower the limit Pmin

Increase the ventilation rate or the VTE value or lower the limit Pmin

Decrease the PEEP value or raise the set PEEP

Decrease the FiO2 value or raise the set FiO2max limit

The last detected valid position is maintained until a new valid position is detected, then the message disappears

Corrective action

Service technician

Recalibrate the proportional valve, internal flow sensor and the characteristic of the proportional valve. If that does not solve the problem, exchange the

1. proportional valve

2. internal flow sensor Check the correct voltage supply for the solenoid vales. If that does not solve the problem exchange the according solenoid valve Recalibrate the pressure sensors and check the according tubing. If that does not solve the problem exchange the module 2 Check the gas supply, the correct tubing and the correct connection and function of the pressure switch Exchange the external flow sensor

the circle system

Ensure the correct function of the circle system and the correct electrical and pneumatic function of the solenoid valves Check the correct position and function of the APL valve. Ensure the correct function of the circle system Recalibrate and check the correct function of the O2 cell. Exchange if necessary

Check the correct position and function of the APL valve

Re-calibrate the O2 sensor

1. Check the correct function of the Vent Dial

Maintenance and Calibration

Display message Cause Corrective action User

System Error Cal Required Call Service

Temp Sensor readings not available Call Service

Temp Sensor out of tolerance Check Heating System Call Service

Fan Error Check Fan - Call Service

AC Power lost, using Battery

Continuous Pressure

Battery running low Use Manual Ventilation

Ambient Air Intake: Check Fresh Gas setting

Set APL to CMV/SP position

Check Settings

30 min. remaining

25 min. remaining

20 min. remaining

15 min. remaining

EEPROM is checked during the start up and during the sensor test for CRC errors

AVM3-1 The measured temperature value is out of tolerance

AVM3-1 The over-temperature switch activated or the temperature of the patient module has not increased for 20 min even though heater is switched on AVM3-1 The Fan does not deliver any impulses AVM3-1 The line power fail signal reports use of battery

AVM3-1 Manual/ spontaneous Over a time of 10 seconds the minimum and the maximum pressure is measured. If the actual pressure is greater than 10 mbar and the difference between the minimum and the maximum pressure is smaller than 5 mbar, the error message is issued

AVM3-1 Battery mode The valid discharge time is over

AVM3-1 CMV, PCV In the expiration phase there is a sub-atmospheric of more than 2 mbar, an error message is issued

AVM3-1 Controlled ventilation

• The measured PEEP value is 5 mbar higher than the set PEEP over a period of 5 ventilation cycles

• The controlled ventilation is being started AVM3-2 CMV The maximum position of the Proportional valve has been reached AVM3-1 Battery mode 30 minutes of battery use left

AVM3-1 Battery mode 25 minutes of battery use left

AVM3-1 Battery mode 20 minutes of battery use left

AVM3-1 Battery mode 15 minutes of battery use left

Take the machine out of use; Call Service

Restore the function of the temperature sensor

Restore the function of the heating blanket

Restore the function of the Fan 1. Check for physical

Restore the line supply 1. Ensure the correct line

Increase the pressure difference

Restore the line supply 1. Charge the battery

Correct the fresh gas flow. When the smallest Pressure zero higher is, the error message disappears

Set APL to VENT (CMV) position

Decrease ventilation frequency or VTE

Restore the line supply 1. Charge the battery

Corrective action

Service technician

Recalibrate the complete system. If that does not solve the problem exchange the module 2 Recalibrate the temperature sensor in the service mode. If that does not solve the problem exchange the module 2 Recalibrate the temperature sensor in the service mode. Check the correct function of the solid state relay and the according power supply

obstructions

2. Exchange the fan voltage

2. Ensure the correct function of the power supply module

2. Check the capacity of the battery, if necessary, exchange it. Check the correct calibration of the pressure sensors

1. Ensure the correct function of the APL valve.

2. check the breathing circuit for obstructions

2. Check the capacity of the battery, if necessary, exchange it.

Maintenance and Calibration

Display message Cause Corrective action User

10 min. remaining

5 min. remaining

Unable to attain target pressure, Adjust flow or I:E ratio PCV Setting not valid

Expiratory time too short

Resume Ventilation

Compliance Test bypassed

AVM3-1 Battery mode 10 minutes of battery use left

AVM3-1 Battery mode 5 minutes of battery use left

AVM3-2 PCV The peak pressure PPEAK is lower than the set volume

AVM3-2 PCV Bellow monitor active. additional volume delivery is not possible AVM3-2 PCV The calculated expiratory time is greater than 1 second (Adult) resp. 0.5 second (Child) AVM3-1

Message to restart the ventilation The system is started without having performed the compliance test

Restore the line supply 1. Charge the battery

Increase driving gas flow or lower the plateau

Reduce ventilation frequency or increase “I”

Reduce ventilation frequency or increase “E”

Restart the ventilation

Perform the compliance test

Corrective action

Service technician

2. Check the capacity of the battery, if necessary, exchange it.

2. Check the capacity of the battery, if necessary, exchange it. Check the system for leakages

Maintenance and Calibration

3.4.2 Alarm messages during the compliance test, leak test and O2 calibration

Display message Cause Corrective action User

System Resistance too high

Leak rate too high

Compliance out of range

System Error Cal Required Call Service

Check Diaphragm Valves

Pressure Reading out of tolerance Perform Compliance Test when convenient

Flow Error: Use Manual Ventilation Call Service

Flow/Volume Readings not available Replace Flow Sensor Call Service

System Error Cal Required - Call Service

Calibrate Breathing System Perform Compliance Test

Insert Breathing system

AVM 3-2

If with in 1 sec. after a flow of 12 l/min has been generated, a pressure increase of 10 mbar is measured AVM 3-2 If after 10 mbar have been reached, 40 mbar are not reached within 2s AVM 3-2 The measured compliance has to be between 2.0 and 9.9

AVM 3-2 Data for parameter or alarm limit settings was not saved correctly, the data exchange between the ventilator modules and on-screen display is faulty or the startup test for Internal circuit EEPROM has failed.

AVM 3-2 The PV closes after 40mbar has been reached. If after this a pressure increase of 4 mbar takes place within 4 s

If the pressure sensors measure a difference greater than 3 mbar during the offset comparison, even though the system is pressure relieved.

Compliance Test

• When during the offset calibration a flow of greater than 3 L/min is detected

• During the compliance test a flow of 12 L/min is delivered through the prop. valve. If the delivered flow is out of tolerance

 Flow Sensor Error AVM3-2 Pressure test

• Cannot be set to zero via the analogue output

• Set DAC value greater than 1,83V

• The amplifier circuit is not working correctly

EEPROM is checked during the start up and during the sensor test for CRC errors

The checking of the solenoid valves failed

The system does not detect a signal from the stop switch in the docking station

Repeat the compliance test Check the breathing circuit for

Troubleshoot the breathing circuit for leakages

Replace bacteria filter and breathing circuit. Use the Compliance test in Standby / OPTIONS to retest. If all else fails call Service. Retry function. Reboot machine. If all else fails call Service.

Remove the Breathing circuit from the Docking Station and check the Decoupling and Expiratory valves for intact membranes. Replace as required or call Service. Take the machine out of use; Call Service

Take the machine out of use; Call Service

Retry function. Reboot machine. If else fails call service

Take the machine out of use; Call Service

Retry function. Reboot machine. If else fails call service

Insert Breathing system, else call service

Corrective action

Service technician

obstructions

Troubleshoot the breathing circuit for leakages

Replace bacteria filter and breathing circuit. Check the complete breathing system for obstructions.

Recalibrate the system. If this fails, exchange the module 2 processor board

Remove the Breathing circuit from the Docking Station and check the Decoupling and Expiratory valves for intact membranes. Replace as required Recalibrate the pressure sensors and check the according tubing. If that does not solve the problem exchange the module 2

Recalibrate the proportional valve, internal flow sensor and the characteristic of the proportional valve. If that does not solve the problem, exchange the

1. proportional valve

2. internal flow sensor

Exchange the external flow sensor

Recalibrate the complete system. If that does not solve the problem exchange the module 2 Check the correct voltage supply for the solenoid vales. If that does not solve the problem exchange the according solenoid valve Test the correct function of the stop switch in the service mode. If the function ids OK, readjust it’s positioning. If the function is faulty, exchange the stop switch

Maintenance and Calibration

Display message Cause Corrective action User

System pressurized

System vented or drive gas missing

AVM 3-2 A pressure larger than 10 mbar is measured before the start of the compliance test AVM 3-2 During the compliance test or Leak test a pressure higher than 10 mbar is not measured

Vent the system by opening the Breathing circuit. Monitor

system pressure. Check the O2 cell is present,

APL valve is set to max (leak test) and breathing circuit is connected properly.

3.4.2.1 Messages during the system tests

Result Compliance Test

Start Up

OK Compliance Test

Passed Leak rate < 300 ml/min Press Enter to

continue OK with a leak of 300ml to 600ml

Compliance Test

Complete

Leak rate is

between 300-600

ml/min

Press Enter to

continue OK with a leak of

Leak Test 500ml to 1000ml

OK with a leak of >600ml/min

Compliance Test

Complete

Leak rate is higher

than 600 ml/min

Tighten valve rings

Check breathing

circuit

Press Enter to

continue OK with a leak of

Leak Test >1000ml/min

Compliance Test Leak Test O2 calibration

Test Passed Leak Test Passed

Set APL Valve to VENT (CMV) position

Test Complete Leak rate is xxx ml/min Compliance is x.x ml/cmH2O Please check breathing circuit

Complete Leak rate is xxx ml/min Verify that APL Valve is set to Max CO2 absorber,

vaporizers locked Test Complete Leak rate is higher than 600ml/min Please check for leaks

Complete

Leak rate is higher

than 1000 ml/min

Verify that APL

Valve

is set to Max CO2

absorber,

vaporizers locked

Corrective action

Service technician

Relieve the system pressure, recalibrate the pressure sensors

Troubleshoot the breathing circuit for leakages

Maintenance and Calibration

Result Compliance Test

Start Up

OK O2Sensor

O2 too high O2 concentration

O2 Sensor too old O2 Sensor is out of

Compliance Test Leak Test O2 calibration

calibration successful

too high Expose Sensor to room air Press Enter to Start

rage Replace O2 Sensor Press Enter to Start

Maintenance and Calibration

3.4.3 Symptoms of Fuse Failures

The following table shows the reaction to a failed fuse on the power supply board. The fuses F2, F3, F4, F5 and F6 have been removed from the power supply module and are therefore subject of the production date.

FUSE Failure during working Failure during start

F8/F9

F10/F11

Display is black; module 1 and 2 do not work

alarm „Solenoid Valves faulty“, „Fan faulty“ and „Ambient Air Intake“; real time curve shows a zero line

alarm „AC power lost, using battery“ after the machine has booted alarm

During the ventilation there is no failure; after you have turned the selector switch to Standby the message „Insert patient module“ is shown; during using battery the message disappeared

Display is black; module 1 and 2 do not boot

after booting the message „Selected mode is not Standby“ is shown; module 2 does not boot; fan does not work

„AC power lost, using battery“ is shown after the machine has booted the message„Insert patient module“ is shown; during using battery the message disappeared

Maintenance and Calibration

3.5 Required Tools

Item Number

1 - Operation manual 2 - Service manual 3 900-4726 Calibration pump, Pressure sensors 0 – 80 cmH2O 4 - Safety analyzer For electrical tests according to IEC-

5 - Digital Volt Meter 6 - Calculator Standard four function 7 900-4715 Temperature simulator 8 - Mass flow meter 0 – 80 l/min ± 2% of reading 9 - Surface cleaner Standard hospital grade 10 340-3000 Gasket set 11 460-0610 Driving gas test adapter with 1 meter

12 603-4000 Test lung Adult size 13 - Test lung Neonate size 14 - High pressure gauge 0 – 2.5 kPa x 100(0 – 2.5 bar;

15 - Low pressure gauge 0 – 250 Pa x 100(0 – 250 mbar; 17 - Hand tools, calibration tool, flat screw

Part

Number

Description Specification

HEYER specification HEYER specification

601-1,B

HEYER specification

HEYER specification HEYER specification

tubing

0 – 38 PSI) 0 – 3.8 PSI)

Metric standard

driver, socket and Allen wrench set

3.6 Disassembly instructions

3.6.1 Connecting and disconnecting vaporizers

1. To connect the vaporizer, place it carefully onto the vaporizer manifold. The manifold is Selectatec type.

2. Lock the vaporizer with the locking lever ¼ turn to the fully locked position.

3. Only vaporizers with interlock-system may be used with this system.

4. After each exchange of a vaporizer, perform a leak test.

3.6.2 Removing the compressed gas tanks (PIN-Index)

1. Ensure that the tank is closed

2. Rotate the hand tight knob that retains the tank against the port seat.

3. Flip the swiveling yoke collar 180 degrees.

4. Grip the tank firmly and remove it from the yoke.

5. Connect a new tank in reverse order, ensuring a single tank washer is present on the yoke port seat.

Maintenance and Calibration

3.6.3 Removing the Patient Module

1. Remove the CO2 absorber dome.

2. Remove the bag in bottle system.

3. Remove the O2 cell cable from the O2 cell.

4. Remove the scavenger hose.

5. Remove the breathing circuit.

6. Turn the locking handle 180° counterclockwise

7. Pull out the patient module.

3.6.4 Removing the CO2 Absorber Canister

1. To release the absorber canister from the patient module, turn the unit counter clockwise. Secure the Canister that it does not fall to the ground when the thread has ended.

Note: The discoloration of the spent soda lime disappears again after some time if it has not

been used. If used again, the color discoloration returns. Dry soda lime becomes malsorbant.

3.6.5 Removing the Bellows and Dome System

1. Turn the unit counter clockwise and unscrew the unit ¼ turn.

2. Once released, remove the silicon bellows by pulling it down form the Patient Module fitting.

3.6.6 Removing the Airway Pressure Limiting Valve (APL)

1. Unscrew the union nut. The top section can now be removed.

2. The membrane can be removed from the bottom section and replaced, if necessary.

3. The membrane is placed back into the bottom section with the metal facing upwards.

4. Replace the top part of the Airway Pressure Limiting valve by lining up the index line in its correct orientation.

5. Secure with union nut.

Caution: The spring in the top of the APL valve may not be stressed. After removal from

the bottom section place the top section to one side, taking care that the spring is not unduly loaded.

Maintenance and Calibration

3.6.7 Inspecting/replacing the Decoupling, Bellow and Expiratory Valves

1. To replace the Patient modules rear side valves’ membrane, undo the coupling nut.

2. After removing the valve assembly, undo the black nut securing the valve.

3. Inspect and /or replace the valve, ensuring no hole or deformity that would cause a leak.

4. Assemble in reverse order

CAUTION: During transportation of the patient module, transportation protection should be

applied at the rear to protect the valves.

3.6.8 Disassembling the Room Air, Inspiration and expiration valves

1. To dismantle the valves, the coupling ring must be unscrewed from the valve body. The valve cover can now be removed.

2. The O-ring and the metal baskets in the expiration or inspiration valve can now be removed. The valve plate can be removed. Assemble in reverse order.

3. The membrane of the room air valve can be carefully removed from the valve body after removing the coupling ring and the valve cover. Assemble in reverse order.

4. The O-rings of the valve bodies have only to be exchanged if the valves were pulled out of the Patient Module’s top.

3.6.9 Removing the Gas Block Module

1. Disconnect all sources of pressurized gas.

2. Remove the screws holding the rear access panel.

3. Remove the internal access panel containing the Gas Block.

4. Remove the screws and nuts holding the gas block to the enclosure.

5. Disconnect the gas lines running to the various connections.

6. Remove the Gas Block as a single module.

7. Reinstall the Gas Block in reverse order. Apply gas pressure and test prior to final button-up.

WARNING: An error in the tubing can lead to a serious health damage or death of the

patient. Reinsure the correct connection of the gas lines before the unit is put back to use.

3.6.10 Removing the flow tubes

1. Remove the Gas Block Module

2. Remove the spring-loaded flow tubes by pushing it up and removing from the bottom.

3. Reinstall in reverse order.

Maintenance and Calibration

3.6.11 Removing the pressure gauges

1. Remove the Gas Block Module

2. Remove the metal compression fittings from the gauge.

3. Remove the gauges from the front panel enclosure.

4. Reinstall in reverse order

5. Connect gas supplies at each gauge. Observe and test compression fittings for leaks.

3.6.12 Removing the Module 2 Circuit Board Set

1. Disconnect AC power.

2. Remove the cables connecting the Module 2 circuit boards to the rest of the Modular+.

3. Remove the three nuts holding the Modular to the enclosure.

4. Remove the Module 2 circuit as a module.

5. Reinstall in the reverse order.

3.6.13 Removing Module1 Circuit Board Set

1. Remove the Module 2 circuit board set.

2. Remove the cables connecting the Module 1 circuit board to the rest of the Modular+.

3. Remove the screws holding the Module 1 to the front plate of the enclosure.

4. Remove the Module 1 circuit boards as a module

5. Reinstall in the reverse order.

3.6.14 Removing the Power Supply Module

1. Disconnect AC power

2. Remove the protection cover of the power supply module.

3. Remove cables connecting the power supply module to the rest of the Modular+.

4. Remove the screws holding the board/module to the access panel.

5. Remove the power supply as a module.

6. Reinstall in reverse order.

Maintenance and Calibration

3.6.15 Removing Internal Regulators, Proportional Valve and Flow Divider

1. Disconnect all sources of pressurized gas.

2. Remove vaporizers.

3. Remove the access panel attached to the yoke assembly.

4. Remove the screws holding the swinging rear access panel.

5. Disconnect each gas hose and electric cable running through each section.

6. Disconnect the top section from the middle section by disconnecting fasteners.

7. Remove the top section exposing the internal regulators and proportional valve. Replace the targeted component. Replace each hose and cable.

8. Reconnect hoses and cables to the new component.

9. Rebuild in reverse order.

10. Apply gas pressure and power to functional test prior to final button-up

Preventive Maintenance

4 Maintenance and Calibration

4.1 Introduction

The Modular+ maintenance and calibration is comprised of four distinct activities:

1. Inspecting and/or replacing consumable parts

2. Adjusting individual potentiometers

3. Functional testing

4. Programming coefficients into stored memory

Consult the Preventive Maintenance chapter of this manual to determine the appropriate interval for inspection and replacement of consumables, mechanical and electronic adjustments, testing and programming. Ensure that all testing materials, including gas drive, breathing circuits, test fixtures, tools and documents are available and in good working order prior to beginning test procedures. Testing and programming requires utilizing internal service software. A password is provided by

HEYER.

4.2 Calibration Warnings and Precautions

WARNING: The Modular+ Anesthesia Machine operates on line voltage and at high

pressure. Therefore, an electric shock hazard may exist when the instrument covers are removed. Repair and calibration procedures should only be preformed by qualified personnel who follow proper servicing techniques. Warnings are given in appropriate location.

WARNING: Possible fire hazard. Fuses (i.e., additional sockets) must only be replaced by

fuses of the same type with the same rating.

WARNING: Possible electrical shock hazard. The machine may only be opened by HEYER

authorized service personnel.

CAUTION: Refer to the maintenance intervals in the preventive maintenance section for

guidance on which steps are preformed when.

CAUTION: Use surgical gloves whenever touching or disassembling valves or other

components of the patient module.

CAUTION: Ensure that the gas supply of the machine always complies with the technical

specification.

CAUTION: If the machine should show faults during the initial calibration or testing, the

machine should not be operated until the fault has been repaired by a qualified service technician.

CAUTION: After servicing, functional, compliance and leak tests must be carried out before

clinical use

CAUTION: Failure to connect device to a grounded mains out may elevate leakage current

in excess of permissible values.

CAUTION: During transportation of the patient module, transportation protection should be

applied to the rear to protect the diaphragm valves

Preventive Maintenance

CAUTION: The spring in the top of the APL valve may not be stressed. After removal,

ensure that the APL valve is in position “CMV” and place to one side, taking care that the spring is not unduly loaded.

CAUTION: Use cleaning agent sparingly. Excess fluid could enter the machine, causing

damage.

4.3 Test Procedure

4.3.1 General

1 Ensure that the Service Manual and Operation Manual are present. 2 Ensure there is no external damage to machine and accessories by visual inspection. 3 Ensure all accessories are complete and functional by visual inspection.

4.3.2 Inspecting/replacing consumable parts

1 Remove the patient module from the Modular+

a Turn on the Modular+ and ensure adequate driving gas is present. b Remove the CO2 absorber dome. c Remove the bag in bottle system. d Remove the O2 cell cable from the O2 cell. e Remove the scavenger hose. f Remove the breathing circuit. g Turn the locking handle 180° counterclockwise h Pull out the patient module. i Verify that the patient module window changes from Unlock to Unlocked.

Preventive Maintenance

valve inlet 40° turned drawn

reservoir /

bag port

insp. port

3 4

exp. port

Fig. 16 Patient module, front view

expiratory diaphragm valve

Preventive Maintenance

bellows control diaphragm valve

decoupling diaphragm valve

Fig. 17 Patient module, top view (diaphragm version)

Pos. No. Description Order No. 1 Airway pressure relief valve, cpl. 323-0095 2 Emergency air valve, cpl. 323-0098 3 Inspiratory valve, cpl. 323-0096 4 Expiratory valve, cpl. 323-0097 5 Heat blanket, cpl 323-0314 6 Flow sensor, cpl. 323-0220 7 Ventilation Bellow 323-0158 8 Absorber vessel 323-0046 9 Bellow dome 323-0045 10 Fixing nut diaphragm valve 323-0294 11 Bessel diaphragm valve 323-0110 12 Ring plate diaphragm valve 323-0042 13 O-ring 28.3x1.78 323-0292 14 Gasket 13x6.5x2 980-1170 15 Diaphragm valve body 323-0100

Preventive Maintenance

2 Ensure that the O-ring (323-0147) and the packing ring (980-1170) of the CO2 absorber are intact. 3 Ensure that the O-ring (323-0147) on the ventilator bellow is intact. 4 Ensure that the O-ring (049-3182) on each vaporizer mount is intact. 5 Check O-rings (049-3052) of the docking station ports (located between the patient module and its

docking station). a Replace O-rings at recommended interval

6 Inspect the spindle nut (323-0115) on the patient module for wear and tear. Replace if necessary. 7 Inspect O-ring washer (980-1174 for O2 and N2O; 980-1170 for AIR) between tank and yoke

connection. Replace if necessary.

8 Ensure the inspiratory valve (610-3156) is intact, replace if necessary. 9 Ensure the expiratory valve (610-3156) is intact, replace if necessary. 10 Ensure the APL valve (323-0310) is intact, replace if necessary. 11 Ensure the Room air valve (323-0099) is intact, replace if necessary. 12 Ensure that the inspiratory and expiratory valve O-rings (610-3157) are intact, replace if

necessary.

13 Ensure the Fresh gas decoupling, Driving gas and expiratory diaphragm valves (323-0100) are

intact, replace if necessary.

14 Check gas supply inlet filters (370-0017) and water traps (340-0344).

a Verify that minimal to no condensation or dirt are present in the inlet filter and bottles. Drain

any liquid from bottles.

b Clean and/or replace the contaminated inlet filters and O-rings, if necessary.

Fig. 18 Supply inlet filters and water traps

Preventive Maintenance

15 Reassemble the patient module and install back into the docking station.

16 Turn off the Modular+ power switch. 17 Verify O2, N2O and AIR tank check valves. *

a Connect and open a full gas tank on each yoke b Withdraw the gas connecting coupling from the supply outlet. c Verify the check valves prevent gas from escaping through the open supply outlets. d Verify there is no external damage to the gas connecting coupling

18 Verify O2, N2O and AIR supply check valves.

a Remove the tanks and reconnect the gas connecting couplings to the supply outlets. b Verify the check valves prevent gas from escaping through the open tanks yokes. c Verify there is no external damage to the gas tank or yoke pins.

* Subject of configuration

Preventive Maintenance

4.3.3 Power supply checks

1 Remove the screws from the upper panel. Swing the door open exposing the power supply PC

board. The power supply assembly is attached to the door.

2 Carefully remove the plastic shield. Warning: AC voltage is present 3 Adjust P1 on the power supply board for +5.2 VDC. Use the ground pin located to the right as

meter ground.

V 54 P 2 Ground P 1 Fig. 19 Power Supply Board 4 Adjust P2 on the power supply board for +12.5 VDC. Use the ground pin located to the right as

meter ground.

5 Verify that the V54 LED is illuminated, indicating -12 VDC. 6 Reinstall the plastic shield to the Power supply assembly.

Preventive Maintenance

4.3.4 Functional Tests

4.3.4.1 Pneumatic tests

1 Perform automatic compliance test.

a Turn on the Modular+ and ensure adequate drive gas is present b Attach a breathing circuit the patient module. c Seal the Y-piece by attaching the open port to the parking place on the side of the patient

module. d Turn off the fresh gas flow or set it to minimal flow in case of basil flow configuration. e Select OK to start the test. The test calibrates the ventilator for tubing compliance at 40 Pa x

100 (40 mbar; 40 cmH2O) and performs a leak test on the patient circuit pneumatics between

the decoupling valve and the expiratory valve. f Verify successful completion and that no leaks are indicated.

2 Perform automatic leak test.

a Turn on the Modular+ and ensure adequate drive gas is present. Enter the Leak Test via the

Options menu. b Attach a breathing circuit the patient module. c Connect the y-piece to the hose end where the reservoir bag normally is connected. d Turn off the fresh gas flow or set it to minimal flow in case of basil flow configuration. e Set the APL valve to max (fully closed) f Select OK to start the test. The test pressurizes the system the pneumatic system all the way

back to the spindle valve of the flow meters. g Verify successful completion and that a minimal leak (less than 300 ml/min at 40 cmH2O) is

indicated.

3 Perform the manual pressure test.

a With the selector switch of the Modular+ turned to the manual position, attach a breathing

circuit to the patient module. b Connect the y-piece to the hose end where the reservoir bag normally is connected. c Set the APL valve to max (fully closed). d Rotate the O2 or AIR spindle until 60 Pa x 100 (60 mbar; 60 cmH2O) is observed on the

screen. e Reduce the gas flow by counter rotating the spindle until the pressure stabilizes at 60 Pa x

100 (60 mbar; 60 cmH2O)

f The gas flow indicates the Modular+’s leak rate. If the automatic Compliance and Leak test

have passed, this test will indicate a leak in the drive gas system, or may be used to

troubleshoot system leaks at a higher-pressure level.

Preventive Maintenance

4 Verify APL Valve accuracy.

a Attach a breathing circuit the patient module. b Connect the y-piece to the hose end where the reservoir bag normally is connected. c Set a fresh gas flow of 5 l/min. d Set the APL valve to each pressure graduation (10, 20, 30, 40 and 50 Pa x 100 (mbar;

cmH2O)) e Compare the valves on the pressure gauge with the valve settings. Deviations from pressure

indication and setting must not exceed ±20% of the set value or 10 Pa x 100 (10 mbar; 10

cmH2O), whichever is greater.

4.3.4.2 Alarm Tests

1 Turn on the Modular+ and ensure adequate driving gas is present. 2 Perform the Compliance test. 3 Verify the

(high and low alarms). a Ventilate a test lung in the CMV mode. b Set each parameter’s alarm limit one at a time, to violate it’s high and low alarm setting. c Verify that alarm indications function.

min (low alarm), Peak pressure (high and low alarms), M.Vol (low alarm) and O2

Fig. 20 Alarm screen

Preventive Maintenance

4 Verify O2 pressure loss alarm (whistle) and N2O cutoff.

a Ventilate a test lung in the CMV mode. b Set the AIR/N2O switch to N2O c Flow 1 l/min O2 and 1 l/min N2O using the flow meter spindle valves.

d Interrupt the O2 supply to the Modular+. e Verify the O2 pressure loss alarm whistle for approximately 7 seconds, and the flow of nitrous

oxide lowers to 0 l/min. If O2 is the ventilator drive gas, an electrical alarm and message will

also activate. f Verify at the same time, Air is available by adjusting the AIR spindle valve. AIR flow will be

available regardless of the position of the AIR/N2O switch position. Air flow can be increased

by rotating the Air flow spindle. g If necessary, adjust the time and loudness level of the O2 deficiency whistle by setting the

screw adjustment next to the Whistle reservoir.

Fig. 21 O2 Whistle adjustment (appearance may differ due to different configuration options) 5 Verify line voltage alarm.

a Interrupt AC line voltage while the respirator unit is in manual/spontaneous or automatic

ventilation mode. b Verify that the line power alarm sounds and that the AC connector icon appears on the

display. The alarm is reset when reconnecting the line power supply. c Verify the battery icon appears on the screen after AC reconnection. This indicates battery

charging.

Preventive Maintenance

6 Verify N2O:O2 ratio system.

a Set the O2 and N2O valves to minimum. b Rotate the N2O valve throughout its range from 0.5 to 10 l/min. c Using the readings from the flow tube, verify that no less than 25% ± 5% O2 can be achieved

at any N2O flow rate.

4.3.4.3 Electrical Tests

1 Check convenient AC outlets.

a Verify AC voltage is present at each AC outlet with the Modular+ Mains switch in the ON or

OFF position.

CAUTION: Perform the following electrical safety inspection as the last step after completing a

repair or after routine maintenance. 2 Conduct electrical safety inspection. 3 Test of electric safety according to IEC 601-1:

a Test the protective conductor resistance. b For the measurement, use a test set according to IEC 601-1. c The maximum protective conductor resistance must not exceed 0.1 Ohms. d Enter the result into the test protocol.

4 Test the leakage current.

a For the measurement use a test set according to IEC 601-1. b Before the measurement of the leakage current, withdraw the power supply cable of all units

form the convince receptacles at the rear side of the apparatus. c The maximum leakage current must not exceed 500µA (0.5 mA). d Enter the result into the test protocol.

5 Test the insulation resistance.

a For the measurement, use a test set according to IEC 601-1. b The insulation resistance must be higher than 70 MOhms. c Enter the result into the test protocol.

Preventive Maintenance

4.4 Service Software

Calibration and testing is accomplished through software driven service diagnostics. The current software version is displayed in the main menu.

To enter the service software

1 Turn off the Mains switch. Set the Switch to standby. Turn on the mains switch. 2 Select the keys

SET

OPT.

One at a time and in sequence, while waiting for the indicator to advance. After each key is pressed, an asterisk (*) will appear in the lower left corner of the screen. When boot up is

completed, the Modular+ enters the service mode.

3 Select Key code.

Fig. 22 Initialization screen

Preventive Maintenance

To Exit the Service Software

1 To exit the service software, select the Exit (or Quit key in advanced screens) to return to the

Initialization screen menu

2 Shut down the Modular+ after each diagnose software session by turning off the mains switch.

4.5 Key code Access

1 Enter a key code (provided during service training) to invoke the service software. 2 Advance from this window to the main menu by pressing OK

Fig. 23 Key code entry screen

Preventive Maintenance

4.6 Navigation

1 While in the main menu screen, select individual keys to calibrate the O2 sensor, Temperature

sensor, P1 pressure sensor, P2 pressure sensor, Internal flow sensor, External flow sensor or proportional valve.

2 Select the test menu screen.

Fig. 24 Main menu screen

Preventive Maintenance

3 While in the test menu screen, Pressure, O2 and Temperature sensors, Proportional valve output,

Solenoid valve continuity, Power indicators, and Heating blanket thermal cutoff.

Fig. 25 Test menu screen

Note: The motor button has no function with units without the patient module

Preventive Maintenance

4.6.1 System Testing

1 Conduct Motor Control test. (Skip to step 1-f if already in the Test menu)

Note: Skip to step 2 if you have a unit without the patient module motor

a Select the Select the keys.

SET

ii)

OPT.

iii)

iv)

b Select KEYCODE to enter the diagnostic screens. c Enter a valid key code to invoke the service software. d Advance from this window to the main menu by pressing ENTER. e Select TEST MENU. f Select MOTOR.

Fig. 26 Patient Module, motor control screen

Preventive Maintenance

g Select UNLOCK and verify the patient Module moves away from the Docking station. Remove

the Patient module. h With the Patient module removed, select the start button located on the inside surface of the

docking station i Select the Stop button located on the inside of the docking station and verify that its screen

indicator illuminates j Reinstall the Patient module and select UNLOCKED to secure it into the docking station. The

start and stop screen will illuminate. k Select QUIT to return to the test menu.

Start switch Stop switch

Fig. 27 Docking station, Start/ Stop switches

Preventive Maintenance

2 Conduct pressure, O2 and temp sensor test. (Skip to step 1-f if already in the Test menu)

a Select the Select the keys.

ii)

SET OPT.

iii)

iv) b Select KEYCODE to enter the diagnostic screens. c Enter a valid key code to invoke the service software. d Advance from this window to the main menu by pressing ENTER. e Select TEST MENU. f Select the P, O2, °C key. g Attach the all tubes to the Y-piece. h Set the APL valve to MAX (fully closed) i Remove the O2 cell from its mount. j Verify that the O2 displays 21% ± 2 % after stabilization.

Fig. 28 Pressure, O2 and Temperature screen

Preventive Maintenance

k P1 and P2 values for both AVM 3-1 and 3-2 rows display 0.0 ± 1 digit. Reinstall the O2 cell to

its mount. l Flow in fresh gas until P1 AVM 3-1 reads approximately 40. m P1 and P2 values for both AVM 3-1 and 3-2 rows display ± 2 digits after stabilization. Release

system pressure. n Verify the correct reading of the temperature sensor. It should be, depending on the heating

status of the patient module, between 20°C and 36°C . o Select QUIT to return to the Test Menu. p Set the APL valve to the CMV position.

Preventive Maintenance

3 Conduct Proportional valve (PV) verification test, with the patient module removed.

(Skip to step 3-m if already in the Test menu with the removed patient module) a Remove the CO2 absorber dome. b Remove the bag in bottle system. c Remove the O2 cell cable from the O2 cell. d Remove the scavenger hose. e Remove the breathing circuit. f Turn the locking handle 180° counterclockwise g Pull out the patient module. h Select the Select the keys.

ii)

SET OPT.

iii)

iv) i Select KEYCODE to enter the diagnostic screens. j Enter a valid key code to invoke the service software. k Advance from this window to the main menu by pressing ENTER. l Select TEST MENU. m While in the Test Menu, select CHARAC. PV.

Preventive Maintenance

Fig. 29 Proportional valve test screen

n Attach a flow meter to measure flow directly from the Drive Gas Outlet.

WARNING Never block airflow at the drive gas outlet. Blocking the airflow at the drive gas

outlet raises internal pressure above specified limits and will result in permanent damage to internal sensors.

o Use the UP/DOWN arrow keys to move the arrow to the desired flow. p Select ENTER to start the flow of gas. q Verify the AVM 3-1 and AVM 3-2 values match the flow rate settings and the flow meter

measurement (± 10%) after stabilization. r Select 0 l/min to stop the flow of gas. s Select QUIT to return to the test menu.

Drive Gas Outlet

Fig. 30 Drive Gas Outlet

t Reinstall the Patient Module.

Preventive Maintenance

4 Conduct Solenoid Valves MV1 – MV4 test. (Skip to step 4-m if already in the Test menu with the

removed patient module) a Remove the CO2 absorber dome. b Remove the bag in bottle system. c Remove the O2 cell cable from the O2 cell. d Remove the scavenger hose. e Remove the breathing circuit. f Turn the locking handle 180° counterclockwise g Pull out the patient module. h Select the Select the keys.

ii)

SET OPT.

iii)

iv) i Select KEYCODE to enter the diagnostic screens. j Enter a valid key code to invoke the service software. k Advance from this window to the main menu by pressing ENTER. l Select TEST MENU.

Fig. 31 Solenoid Valves MV-1 MV-4 test screen

Preventive Maintenance

m Select M1-M4 n Activate the MV1 valve by pressing its label (shown on screen). Verify gas flow at the docking

station’s Diaphragm valve connection. o Activate the MV3 valve. Verify gas flow at the docking station’s decoupling Valve connection. p Activate the MV2 and MV4 valves at the same time. Verify gas flow at the docking station’s

expiratory valve connection. q Select QUIT to return to the Test menu. r Insert the Patient Module.

Fig. 32 Docking Station valve connectors

Decoupling

Bellows

Expiratory

Preventive Maintenance

5 Conduct Power control test (Skip to step 5-e if already in the Test menu.)

a Select the Select the keys.

ii)

SET OPT.

iii)

iv) b Select KEYCODE to enter the diagnostic screens. c Enter a valid key code to invoke the service software. d Advance from this window to the main menu by pressing ENTER. Select TEST MENU. e Select MISC. f Unplug the AC mains cable and verify the AC-OK indicator illuminates. g Plug in the AC and verify the BATT (charging) indicator illuminates. h Select QUIT to return to the test menu.

Fig. 33 Power and Heater Control screen

Preventive Maintenance

4.6.2 Coefficient programming

4.6.2.1 O2 sensor calibration

1 Enter the Service Software by pressing the following keys prior to the end of the startup routine:

SET

OPT.

c d

2 Select KEYCODE to enter the diagnostic screens. 3 Enter a valid key code to invoke the service software. Advance from this window to the main menu by pressing ENTER. 4 Select O2 sensor to enter the O2 sensor screen.

Note: This test should be performed using a new and acclimatized O2 cell.

Fig. 34 O

Calibration screen

Preventive Maintenance

5 Adjust the minimum range calibration

a Place the oxygen sensor into room air (21%) b Turn O2 OFFS potentiometer (P5, AVM 3-2) until the values on the screen show 20 c Select MIN on the touch screen.

6 Adjust the maximum range calibration.

a Place the oxygen sensor into 100% O2 by reinstalling it into its mount. b Apply oxygen flow for one minute. Allow O2 cell to stabilize. c Turn O2 GAIN potentiometer (P6, AVM 3-2) counter clockwise until the values shows close to

or 80 d Select MAX on the touch screen. e Remove the source of 100% O2 and vent the O2 cell to room air (21%) f Verify that the MIN setting has not changed more than ±2 digits.

7 Select SAVE twice on the touch screen to store the minimum and maximum values into memory.

Readjust if necessary.

8 Select QUIT to return to the main menu.

Caution: Pressing QUIT at any time during the procedure will cancel the session’s

settings and reload the previously stored calibration coefficients.

Preventive Maintenance

4.6.2.2 P1 Pressure sensor calibration

(Skip to Step 5 if already in the Main menu.)

1 Enter the Service Software by pressing the following keys prior to the end of the startup routine:

SET

OPT.

c d

2 Select KEYCODE to enter the diagnostic screens. 3 Enter a valid key code to invoke the service software. Advance from this window to the main menu by pressing ENTER. 4 Select P1 sensor to enter the P1 sensor screen.

Fig. 35 P1 Calibration screen

Preventive Maintenance

5 Adjust minimum range calibration

a Apply ambient pressure to the system by removing the breathing circuit from the patient

module. b Turn the P1 OFFS potentiometer (P11, AVM 3-2) until the screen bar graph shows 20.

c Select MIN on the touch screen.

6 Adjust maximum range calibration

a Attach a Calibration pump (900-4726) to the Pressure sensor P1 on the Module 2, AVM 3-2

board. b Apply a pressure of 80 cmH2O to the Pressure sensor P1. c Turn the P1 GAIN potentiometer (P10, AVM 3-2) until the screen bar shows 80. d Select MAX on the touch screen. e Remove the calibration pump and reconnect the original tube to the pressure sensor P1. f Check both valves alternately for correctness and readjust, if necessary.

7 Select SAVE twice on the touch screen to store minimum and maximum values in memory. 8 Select QUIT to return to the main menu

Caution: Pressing QUIT at any time during the procedure will cancel the session’s

settings and reload the previously stored calibration coefficients.

Preventive Maintenance

4.6.2.3 P2 Pressure sensor calibration

(Skip to Step 5 if already in the Main menu.)

1 Enter the Service Software by pressing the following keys prior to the end of the startup routine:

SET

OPT.

c d

2 Select KEYCODE to enter the diagnostic screens. 3 Enter a valid key code to invoke the service software. Advance from this window to the main menu by pressing ENTER. 4 Select P2 sensor to enter the P2 sensor screen.

Fig. 36 P2 Calibration screen

Preventive Maintenance

5 Adjust minimum range calibration

a Apply ambient pressure to the system by removing the breathing circuit from the patient

module. b Turn the P2 OFFS potentiometer (P8, AVM 3-2) until the screen bar graph shows 20.

c Select MIN on the touch screen.

6 Adjust maximum range calibration

a Attach a Calibration pump (900-4726) to the Pressure sensor P2 on the Module 2, AVM 3-2

board. b Apply a pressure of 80 cmH2O to the Pressure sensor P2. c Turn the P2 GAIN potentiometer (P7, AVM 3-2) until the screen bar shows 80. d Select MAX on the touch screen. e Remove the calibration pump and reconnect the original tube to the pressure sensor P2 f Check both valves alternately for correctness and readjust, if necessary.

7 Select SAVE twice on the touch screen to store minimum and maximum values in memory. 8 Select QUIT to return to the main menu

Caution: Pressing QUIT at any time during the procedure will cancel the session’s

settings and reload the previously stored calibration coefficients.

Preventive Maintenance

4.6.2.4 Temperature Sensor Calibration

(Skip to Step 5 if already in the Main menu.) 1 Enter the Service Software by pressing the following keys prior to the end of the startup routine:

SET

OPT.

c d

2 Select KEYCODE to enter the diagnostic screens. 3 Enter a valid key code to invoke the service software. Advance from this window to the main menu by pressing ENTER. 4 Select TEMP.SENS to enter the Temperature sensor screen.

Fig. 37 Temperature Sensor screen

Preventive Maintenance

5 Adjust minimum range calibration.

a Connect a Temperature simulator directly to the X7 connector on the Module 2 AVM 3-1

board. b Apply a simulated temperature of 0 °C (Min) c Turn the TEMP OFF potentiometer (P1, AVM 3-1) until the screen pointer shows 20. d Select MIN on the touch screen.

6 Adjust maximum range calibration.

a Apply a simulated temperature of 60 °C (Max) b Turn the TEMP GAIN potentiometer (P2, AVM 3-1) until the screen pointer shows 80. c Select MAX on the touch screen.

7 Check both of the valves alternately for correctness and readjust, if necessary. 8 Select SAVE twice on the touch screen to store minimum and maximum values in memory. 9 Select QUIT to return to the main menu. 10 Replace the simulator with the cable originally plugged into X7.

Caution: Pressing QUIT at any time during the procedure will cancel the session’s

settings and reload the previously stored calibration coefficients.

Preventive Maintenance

4.6.2.5 Proportional Valve Calibration

Caution: The three procedures “Proportional Valve Calibration”, “Internal Flow Sensor

Calibration” and “Characteristic of the Proportional Valve” must always be performed together in the order as in the manual, never individually.

(Skip to Step 2 if already in the Main menu.)

a Remove the CO2 absorber dome. b Remove the bag in bottle system. c Remove the O2 cell cable from the O2 cell. d Remove the scavenger hose. e Remove the breathing circuit. f Turn the locking handle 180° counterclockwise g Pull out the patient module. h Select the Select the keys.

ii)

SET OPT.

iii)

iv) i Select KEYCODE to enter the diagnostic screens. j Enter a valid key code to invoke the service software. k Advance from this window to the main menu by pressing ENTER. l Select TEST MENU.

Preventive Maintenance

2 Select PROP.V to enter the Proportional Valve screen.

Fig. 38 Proportional Valve Calibration screen 3 Adjust minimum range calibration.

a Attach an external flow meter to the drive gas outlet of the docking station. Verify zero flow.

Fig. 39 Docking Station, drive gas outlet

b Select MIN to close the proportional valve. c Turn the P.V.OFF potentiometer (P1, AVM 3-2) until screen pointer shows 3. d Select MIN twice to record the value.

Drive Gas Outlet

Preventive Maintenance

4 Adjust the maximum range calibration.

a Select MAX to open the Proportional valve. b Turn the P.V.GAIN potentiometer (P2, AVM 3-2) until screen pointer shows 97. c Select MAX twice to record the value.

5 Measure the gas flow at the drive gas outlet of the docking station.

a Verify that the flow is at least 75 (–5) l/min b Select MIN to close the proportional valve. c If the gas flow was within specification, skip the steps 14 and 15 and perform step 16. If the

flow rate was out of specification, go to step 14.

6 High-pressure regulator adjustment.

a Remove the Driving gas pressure source (AIR or O2). b Disconnect the red plug of the test port on top of the pressure regulator for the driving gas.

Test Port

Fig. 40 Pressure Regulator for the Driving Gas with Test Port

c Attach a pressure gauge to the test port. d Reconnect the Driving gas pressure source (AIR or O2). e Adjust the high pressure regulator by loosing the locking nut on the regulator and turning the

adjustment screw until 200 ± 0.05 kPa (2 ± 0.05 bar; 29 ± 1 PSI) is displayed on the pressure

gauge. Retighten the locking nut.

f Remove the Driving gas pressure source (AIR or O

Preventive Maintenance

7 Reconnect the red plug of the test port on top of the pressure regulator for the driving gas. Adjust

the voltage of the internal flow sensor. a Connect the measurement tips of a voltmeter to the X 5-1 and ground connector (module 2,

AVM 3-2) b Select MAX to open the proportional valve.

c Turn the adjustment screw on top of the flow divider until you have a voltage of 4.6 ± 0.1 V at

the measuring points mentioned above

Adjustment Screw

Fig. 41 Adjustment Screw on top of the Flow Divider

d Select MIN to close the proportional valve.

8 Save values in memory

a Select SAVE twice on the touch screen to store minimum and maximum values in memory. b Select QUIT to return to the main menu.

Caution: Pressing QUIT at any time during the procedure will cancel the session’s

settings and reload the previously stored calibration coefficients.

Preventive Maintenance

4.6.2.6 Internal Flow Sensor Calibration

Caution: The three procedures “Proportional Valve Calibration”, “Internal Flow Sensor

Calibration” and “Characteristic of the Proportional Valve” must always be performed together in the order as in the manual, never individually.

1 Select FLOW.INT to enter the Internal flow sensor screen sensor screen.

Fig. 42 Internal Flow Sensor Calibration Screen 2 Adjust minimum range calibration.

a Select MIN to apply a zero flow. b Select MIN again to record the value.

3 Adjust maximum range calibration.

a Select MAX to apply the maximum flow. b Select MAX again to record the value.

4 Select MIN again to close the valve. 5 Select SAVE to store the values into the memory.

6 Select QUIT to return to the main menu.

Preventive Maintenance

Caution: Pressing QUIT at any time during the procedure will cancel the session’s settings and reload the previously stored calibration coefficients.

Preventive Maintenance

4.6.2.7 Characteristic of the Proportional Valve

Caution: The three procedures “Proportional Valve Calibration”, “Internal Flow Sensor

Calibration” and “Characteristic of the Proportional Valve” must always be performed together in the order as in the manual, never individually.

1 Select CHARAC.PV to enter the Characteristic of the Proportional Valve screen. 2 Attach an external flow sensor to the drive gas outlet of the docking station.

3 To calibrate the proportional valve, select the increment keys (along the bottom edge of the

screen) until the flow meter displays the number that the on screen arrow is pointing to.

Fig. 43 Characteristic of the Proportional Valve screen 4 When each flow is achieved within the limits specified in the table below, select ENTER to step to

the next designated flow rate.

5 Set each flow (from 1 to 75 l/min) to the specified tolerance in the following table. Select ENTER

after each setting to step to the next designated flow rate (on screen arrow).

Caution: Pressing QUIT at any time during the procedure will cancel the session’s

settings and reload the previously stored calibration coefficients.

Preventive Maintenance

Tolerance rage for the flow values:

Flow Setting Tolerance

1 l/min: +0 / - 0.1 2 l/min: +0 / - 0.1 4 l/min: +0 / - 0.1 6 l/min: +0 / - 0.1 8 l/min: +0 / - 0.1 10 l/min: +0 / - 0.2 12 l/min: +0 / - 0.2 15 l/min: +0 / - 0.2 20 l/min: +0 / - 0.4 25 l/min: +0 / - 0.4 30 l/min: +0 / - 0.4 35 l/min: +0 / - 0.4 40 l/min: +0 / - 0.4 45 l/min: +0 / - 1 50 l/min: +0 / - 1 55 l/min: +0 / - 1 60 l/min: +0 / - 1 65l/min: +0 / - 1 70 l/min: +0 / - 1 75 l/min: +0 / - 5

6 Select ENTER again. 7 Select SAVE twice. 8 Select QUIT to stop the flow of gas and to return to the main menu. 9 Reinstall the patient module.

Preventive Maintenance

4.6.2.8 External Flow Sensor Calibration

(Skip to Step 5 if already in the Main menu.) 1 Enter the Service Software by pressing the following keys prior to the end of the startup routine:

SET

OPT.

c d

2 Select KEYCODE to enter the diagnostic screens. 3 Enter a valid key code to invoke the service software. 4 Advance from this window to the main menu by pressing ENTER. 5 Select TEST MENU. 6 Select MISC. 7 Activate the patient module heater by pressing the HEAT key. 8 Switch to the P, O2, °C screen and monitor the temperature. When a tem perature higher than

30 °C is reached, select QUIT twice to return to th e MAIN menu.

9 Select FLOW EXT to enter the External Flow Sensor Calibration screen.

Fig. 44 External Flow Sensor Calibration screen

Preventive Maintenance

10 With the Patient Module still warm, disconnect any breathing circuit that may be attached and

verify that there is no gas flow at the Expiratory or Inspiratory ports on the Patient Module.

11 Increase the DAC value using the increment keys until the bar indicator for AVM 3-2 shows

50.0 ± 0.2.

12 Measure the DC voltage between the junction of R35 and R19 on the Module 2 AVM 3-2 board

and the boards ground pin.

13 Record the voltage at the junction of R35 and R19 as U1. 14 Measure the DC voltage between V13 Pin 8 and ground. 15 Record the voltage between Pin 8 of V13 and ground as U2. 16 Adjust P3 on the Module 2 AVM 3-2 board as necessary to obtain a 1:1.4 ratio between

reading #1 and reading #2, as seen in the example below.

Example: Measure U1 = 1.45 VDC

U2 = 1.91 VDC

Calculate 1.91 / 1.45 = 1.32 Evaluate the ratio is too small. The target ratio is 1.4 Correct Turn P3 clockwise to increase the ratio.

Preventive Maintenance

Fig. 45 How to measure the voltages U1 and U2

Preventive Maintenance

5 Preventive Maintenance

The following is a list of activities required for periodic maintenance of the HEYER Modular+ anesthesia system. Physical inspection, replacement of consumables and performance checks should be periodically performed per the schedule listed below. Certain calibration adjustments are only required only after replacing one or both of the active devices. HEYER is not responsible for component failure or loss resulting from the use of stated consumables beyond their recommended replacement interval. These are noted in the Preventive Maintenance Checklist on the following pages.

5.1 6 Month Service Interval

                                

Ensure operators manual is present Ensure preoperative Checkout list is attached Check unidirectional valves operate by visual inspection Check low O2 pressure alarm whistle Check “No driving gas” alarm Check the function of the N2O cutoff incase of O2 pressure loss Check the function of the N2O / AIR switch Check the differentiation of the flow meters knobs Check the function and correct flow of the O2 flush. Check that all flow meters work throughout their range Check the function of the Hypoxic Guard Check the function of the back light illumination Perform the compliance test at power up Perform Leak Test (Options Menu) without vaporizers Perform Leak Test (Options Menu) with vaporizers Perform O2 Cell calibration (Options Menu) Perform Manual tightness test Check the function and the accuracy of the APL valve in the manual mode Check the O2 display, 21% in room air, >95 in 100% O2 Check the correct function of the of the individual ventilation alarms Check the correct function of the Mute button Check the correct function of the Alarm LEDs Check that all cylinder and pipeline supply pressure gauges operate Inspect the line power cord Inspect/Clean water traps and filters Verify that the Patient motor works correctly Verify the gas tank check valves* Verify the pipeline supply check valves* Verify line voltage interruption alarm message Verify battery operation Verify the 115/230 volts AC at the convenient outlets Perform ventilation performance check Replace the O-rings on the vaporizer manifold (4 x 049-3182)

Preventive Maintenance

          

*Subject of the configuration

Replace the APL valve membrane (323- 0310) Replace O-rings on the docking station (4 x 049-3052) Replace O-rings between tanks and yokes (N2O & AIR: 800-5947; O2: 800-5946)* Replace the O-ring of the CO2 absorber (323-0147) Replace the flat seal of the CO2 absorber (980-1170) Replace the O-ring of the Patient dome (323-0147) Replace the O-rings of the O2 Cell (609-3021 + 049-3074) Replace the fan filter (800-5580) Check the threaded insert for the CO2 absorber Check the correct function of the brakes Test of electric safety according to IEC 601-1

5.2 12 Month Service Interval

                   

Perform all the points of the 6 Month Service Interval Inspect and if necessary, replace the spindle nut of the patient module Examination of the internal hose connection Replace the o rings gas pipeline inlet block (1 x 980-1170; 2 x 980-1174) Replace the silicon valve plates (2 x 610-3156) Replace the O-rings of the in-and expiratory valve seat (2 x 610-3157) Replace the diaphragm valves (3 x 323-0100) Replace the diaphragm valve O-rings (3x 323-0292) Replace the flat rings at the bellows valve screw fitting (3x 980-1170) Replace the O-rings of the APL valve (3 x 323-0272) Replace the O-rings of the valve seatings (3 x 2 x 323-0272) Replace the O-rings for the valve seating screws (4 x 960-1036) Replace the O-rings of the test adapter (2 x 049-3052) Enter the service software Check and if necessary calibrate the O2 sensor Check and if necessary calibrate the Pressure sensors P1 and P2 Check and if necessary calibrate the temperature sensor Check the 2 kPa x 100 (2 bar; 30 PSI) pressure reducer for the driving gas Check the 200 Pa x 100 (200 mbar; 3 PSI) pressure reducers for the solenoid valve block Check the electrical and pneumatic function of the solenoid valves MV1 to MV4

5.3 36 Month Service Interval

  

Perform all the points of the 12 Month Service Interval Replace the internal battery (340-2020) Replace the room air valve membrane (323-0099)

100

Heyer Modular Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual