Heyer Modular Service manual
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
2
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
4
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
5
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
6
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
8
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.
9
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.
10
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.
11
Theory of Operation
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12
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.
14
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
PE
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
8
1 1
1
1
2
2
2
2
2
3
4
7
3
3 4
4
5
6
6
5
Circuit breaker
5 A
battery
Convenience
Fig. 1 Line Terminal Block, 120/230VAC Supply
The 120 V configuration has
additional circuit breakers
15
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
P2
module 2
AVM 3-2
Ventilation
solenoid valve
P1
ext. flow
sensor
int. flow
sensor
16
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
17
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
AC
AC
AC
black/
orange
white
18
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
19
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
20
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
21
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
22
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
X4
P1
P2
X3X2
CPU-board
IF
EF
1
O2
1
P9
PV
1
X8
X9
X10
X11
AVM 3-2
P3
P5
1
1
1
1
P6
P1
P8
P7
P1
P1
P11
P10
R33
Pressure
Sensor #2
Pressure
Sensor #1
P2P1
X5
1
X7
GND
X1
X8
P2
P2
P2
X3
X1
1
7
23
456
8
MD
1
ON
CPU-board
AVM 3-1
X13
X7
1
GND
Q1
V29
V30
V38
V19
AVM 3-1
Software
+12 GND
GND
+5(1)
1
X15
GND
GND
+5(2)
Power Supply
-12
Fig. 5 View on module 2
DIS/AC
HTON
M
BATT
+31
1
X16
swrtrs wsswge
Motor
(-) (+) -> lösen
Endsch.
Start
X11
1
gn
23
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.
24
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.
25
2.14 Ventilator pneumatic
Repair Information
Fig. 6 Ventilator pneumatic
26
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.
27
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
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.
28
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
29
Repair Information
1 2
3
4
5
2.15.2 Bottom and back side view on the patient module
6
7
8
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)
30
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