Getinge Maquet SERVO-i User manual

Servo-i Ventilator System
Service Manual CRITICAL CARE

Servo-i Ventilator System Important
1 - 2 Service Manual Revision 02
Notes

Important Servo-i Ventilator System
Revision 02 Service Manual 1 - 3
Contents
1. Important .........................................................................
2. Introduction .....................................................................
3. Description of functions .................................................
4. Disassembling and assembling .....................................
5. Service procedures .........................................................
6. Troubleshooting ..............................................................
7. Preventive maintenance .................................................
8. Index.................................................................................
9. Diagrams .........................................................................
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Servo-i Ventilator System Important
1 - 4 Service Manual Revision 02
General
• Service documentation for the Servo-i Ventilator
System consists of:
– User's manual. The User's manual is an
indispensable complement to the Service
Manual for proper servicing.
– Service Manual
– Installation Instructions
– Spare Parts information.
– Documentation for all optional equipment
included in the Servo-i System is also available.
• The Servo-i Ventilator System is referred to as
the Servo-i troughout this manual.
• There are two serial number labels on the unit:
– One label is attached to the Patient Unit close
to the supply gas inlets. The serial number
stated on this label is the ID number of the
Patient Unit. The serial number is also stored in
the SW memory as the 'System ID'.
– One label is attached to the rear side of the
User Interface close to the On/Off switch. The
serial number stated on this label is the ID
number of the User Interface.
• System version number can be found in the
Status window on the User Interface. Make sure
that the version of the User's manual
corresponds to the System version.
Text inside a box is used to highlight important
information.
• In addition to the Important information given
here and in the related documents (e. g. in the
User's manual), always pay attention to
applicable local and national regulations.
• Responsibility for the safe functioning of the
equipment reverts to the owner or user in all
cases in which service or repair has been done
by a non-professional or by persons who are not
employed by or authorized by Maquet, and when
the equipment is used for other than its intended
purpose.
1
Hazard notices
• Before disassembling or assembling of the
Servo-i, make sure that the:
– On/Off switch is set to Off.
– Mains power cable is disconnected.
– Gas supply is disconnected (wall and/or
cylinder).
– Battery modules are disconnected.
– The Servo-i is cleaned according to
instructions in the User's manual, chapter
'Routine cleaning' and chapter 'Regular
maintenance', section 'Extended cleaning of
inspiratory channel'.
• With power supply connected to the Servo-i,
there are energized electrical components inside
the unit. All personnel must exercise extreme
caution if fault tracing or adjustments are
performed with power supply connected and
with user interface and patient unit covers
removed.
Symbols used in this manual
•ESD sensitive components. When
handling ESD-sensitive devices,
established procedures must be
observed to prevent damage.
•Special waste. Discard disposable,
replaced and left-over parts in
accordance with appropriate
industrial and environmental
standards.
•Recycling. Recycle if possible.
Recycling facilities may not be
available in all areas.
•Technical training. Refers to the
Technical training supplied by
Maquet.
•Service contract. Refers to the
Service contract supplied by
Maquet.
Important

Important Servo-i Ventilator System
Revision 02 Service Manual 1 - 5
To the responsible service personnel
• The contents of this document are not binding.
If any significant difference is found between the
product and this document, please contact
Maquet for further information.
• We reserve the right to modify products without
amending this document or advising the user.
• Only personnel trained and authorized
by Maquet shall be permitted to
perform installation, service or
maintenance of the Servo-i.
Only Maquet genuine spare parts must
be used. PC boards (spare parts) must always be
kept in a package for sensitive electronic
devices. Maquet will not otherwise assume
responsibility for the materials used, the work
performed or any possible consequences of
same.
• The device complies to standards and
requirements as stated in the 'Servo-i Ventilator
System – User's manual'.
Installation
• Only personnel trained and authorized
by Maquet shall be permitted to install
the Servo-i. The installation and
handing over procedures are described
in the 'Servo-i Ventilator System –
Installation Instructions'.
Functional check
• After any installation, maintenance or service
intervention in the Servo-i, perform a 'Pre-use
check' according to instructions in the 'Servo-i
Ventilator System – User's manual'.
Service
• The Servo-i must be serviced at regular
intervals by personnel trained and
authorized by Maquet.
Any maintenance or service must be
noted in a log book provided.
• It is recommended that maintenance
and service is done as a part of a
service contract with Maquet.
• Preventive maintenance must be performed at
least once every year as long as the unit is not
used more than normal. Normal operation is
estimated to correspond to approx. 5.000 hours
of operation. Details are found in this Service
Manual, chapter ”Preventive maintenance”.
• The Battery modules shall be replaced every
three years.
• The internal Lithium batteries (on PC 1771 and
PC 1772) shall be replaced every five years.
• Worn-out batteries must be recycled or
disposed of properly according to local
regulations. Recycle facilities may not
be available in all areas.
• Batteries must not be disposed of with
ordinary waste. Discard all other
disposable, replaced and left-over parts
in accordance with appropriate
industrial and environmental standards.
• When working with ESD sensitive
components, always use a grounded
wrist band and a grounded work
surface. Adequate service tools must
always be used.
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Important

Servo-i Ventilator System Important
1 - 6 Service Manual Revision 02
Environmental declaration
Purpose
This environmental declaration is for a Servo-i
basic unit including the carrier and one battery.
Letters codes within brackets refers to the
Functional Block Diagram in chapter Diagrams.
Components with special environmental concern
Components listed below shall be disposed of in
an environmentally safe way.
Printed circuit boards
• PC 1770 Main back-plane
• PC 1771 Control, including a Lithium battery (C)
• PC 1772 Monitoring, including Lithium battery (M)
• PC 1775 Plug-and-Play back-plane (P)
• PC 1777 Panel (U)
• PC 1778 DC/DC & Standard connectors (P)
• PC 1780 Pneumatic back-plane (I)
• PC 1781 Pressure transducer, 2 pcs (T)
• PC 1784 Expiratory channel (F)
• PC 1785 Expiratory channel connector (E)
• PC 1786 Expiratory channel cassette (E)
• PC 1789 Remote alarm connector (A)
Other electronics
• TFT assembly including backlight (U)
• Touch screen (U)
•O
2cell, containing Pb (I)
• Air module, containing multiple PC boards (I)
•O
2module, containing multiple PC boards (I)
• AC/DC Converter, containing PC boards (P)
• Expiratory cassette (E)
• Expiratory valve coil (E)
• Safety valve pull magnet (I)
Construction materials
The construction materials used in Servo-i in % of
the total weight.
Metal – total 77%
• Aluminium 70%
• Steel, zink, brass 8%
Polymeric material – total 9%
• PA (Polyamide)
• POM (Polyoxymethylene)
• SI (Silicone)
• TPE (Thermoplastic elastomer)
• PUR (Polyurethane)
• ABS (Acrylicnitrilebutadienstyrene)
• EPDM (Ethylenepropylenedienemonomer)
• PTFE (Polytetrafluoroethylene)
• FPM (Fluororubber)
• NBR (Nitrilerubber)
• PP (Polypropylene)
• PVC (Polyvinyl chloride)
• PS (Polystyrene)
Electronics – total 14%
• Accumulators Nickel Metalhydride
• Printed circuit boards, cables etc.
Others – very small amounts
• Sterile filter paper of glass fibre
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Important

Important Servo-i Ventilator System
Revision 02 Service Manual 1 - 7
Articles of consumption
1. Bacteria filter
2. Filters for the gas modules
3. Filter for the inspiration pressure transducer
4. Filter for the O2cell
5. Nozzle units for the gas modules
6. Battery modules
7. Lithium batteries
8. Expiratory cassette
9. Expiratory cassette membrane
10. O2cell
11. Backlight lamps.
Item 1: Consumption approximately 250 pcs/year.
Items 2 – 5: Changed approx. every 5.000 hours.
Items 6 – 7: Changed approx. every 15.000 hours.
Items 8 – 11: Changed when needed.
Power consumption
The power consumption depends on the operating
mode and whether the internal batteries are being
fast or trickle charged.
Mode Fast charging Trickle charging
In operation 70 W 38 W
Standby 65 W 33 W
Off 35 W 6 W
Noise level
Less than 50 dBA.
Packing materials
The amounts of packing materials will vary
depending on customer adaptation.
Materials for packing:
• Loading pallet. Fulfils the USA requirements
7 CFR 319.40 May 25’th 1995.
• Corrugated cardboard
• Stretch film of Polyethylene, PE.
• Shock-absorbing material of expanded
polyethylene, EPE, or expanded polypropylene,
EPP.
• Clamps of Polyethylene, PE.
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Important

Servo-i Ventilator System Important
1 - 8 Service Manual Revision 02
Notes
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Servo-i Ventilator System Introduction
Revision 02 Service Manual 2 - 1
2
2. Introduction
Main units .......................................................... 2 - 2
User Interface ................................................. 2 - 4
Patient Unit ..................................................... 2 - 6
Servo-i software structure................................. 2 - 9
General ........................................................... 2 - 9
Breathing ........................................................ 2 - 9
Monitoring ...................................................... 2 - 9
Panel ............................................................... 2 - 9
System ID ....................................................... 2 - 9
Only personnel trained and authorized
by Maquet shall be permitted to perform
installation, service or maintenance of
the Servo-i.
Make sure to prepare the Servo-i properly before
disassembling and assembling. Refer to section
'Hazard notices' in chapter 'Important'.
Any service or maintenance must be noted in a
log book.
Discard disposable, replaced and left-over parts
in accordance with appropriate industrial and
environmental standards.
After any installation, maintenance or service
intervention in the Servo-i, perform a 'Pre-use
check'. Refer to the 'Servo-i Ventilator System –
User's Manual' for details.

Introduction Servo-i Ventilator System
2 - 2 Service Manual Revision 02
2
Main units
The Servo-i is available in different main
configurations:
• Infant
• Adult
• Universal
These main configurations are as standard equipped
with a number of ventilation modes suitable for each
patient category. Further ventilation modes can be
installed via software Option Upgrades.
The Servo-i can be divided into the following main
units:
• User Interface. The User Interface contains all
controls used to set the ventilation and monitoring
parameters. Ventilation parameters as well as other
important information are shown on the User
Interface display.
• Patient Unit. The Patient Unit contains pneumatics
and electronics for gas supply to the patient.
Power supply and battery back-up is also
contained in the Patient Unit.
The Control cable connects the User Interface and
the Patient Unit.
The Servo-i shown in the illustration is mounted onto
the optional Servo-i Mobile cart.
Patient Unit
User Interface
Servo-i
Mobile Cart

Servo-i Ventilator System Introduction
Revision 02 Service Manual 2 - 3
2
A number of optional equipment can be added to the
Servo-i Ventilator System. For further information,
refer to the documents listed below.
Servo-i Mobile cart
• Mobile cart with drawers
• Mobile cart without drawers
• Mobile cart for Compressor Mini.
Refer to:
• Servo-i – User's Manual
• Servo-i Mobile cart – Installation Instructions
Servo Ultra Nebulizer, Servo-i
Refer to:
• Servo-i – User's Manual
• Servo Ultra Nebulizer, Servo-i – Installation
Instructions
Compressor Mini
Refer to:
• Servo-i – User's manual
• Compressor Mini – Operating Manual
• Compressor Mini – Service Manual
• Compressor Mini – Installation Instructions
Servo-i Holder
Refer to:
• Servo-i – User's Manual
• Servo-i Holder – Installation Instructions
Servo-i Shelf base
Refer to:
• Servo-i – User's Manual
• Servo-i Shelf base – Installation Instructions
Support Arm 177
• Servo-i – User's manual
• Support Arm 177 – Installation Instructions
Gas trolley
• Servo-i – User's manual
• Gas trolley – Installation Instructions
Gas cylinder restrainer
• Servo-i – User's manual
• Gas cylinder restrainer – Installation Instructions
IV Pole, Servo-i
• Servo-i – User's manual
• IV Pole, Servo-i – Installation Instructions
User Interface panel cover
• Servo-i – User's manual
• User Interface panel cover – Installation
Instructions
Battery module
• Servo-i – User's manual
• Battery module – Installation Instructions
CO2Analyzer module, Servo-i
• Servo-i – User's manual
•CO
2Analyzer module, Servo-i – Installation
Instructions
Humidifier holder and Humidifier
• Servo-i – User's manual
• Humidifier – Operating Manual
• Humidifier holder – Installation Instructions
Alarm output connector
• Servo-i – User's manual
• Alarm output connector – Installation Instructions
• Alarm output connector – Reference Manual

Introduction Servo-i Ventilator System
2 - 4 Service Manual Revision 02
2
SVX9011
User Interface
The User Interface can be mounted onto the Mobile
cart but can also easily be removed from the cart
and mounted on the bed post or table/shelf.
The User Interface can be rotated and tilted into a
suitable position. Locking levers, mounting devices
and some other items are shown in the illustration
above.
1. Display with touch screen.
2. Fixed keys for immediate access to special
windows.
3. Main rotary dial.
4. Special function keys.
5. Direct access knobs.
6. Mains indicator (green).
7. Standby indicator (yellow).
8. Start/Stop (Standby) ventilation key.
9. Luminescence detector, adjusts display
brightness automatically.
10. Loudspeaker grid.
11. Cable reel.
12. PC card slot with slot cover.
13. Control cable between User Interface and
Patient Unit.
14. Service connector, for PC.
15. On/Off switch.
16. Panel holder
17. Locking screw, alternative mounting
18. Locking arm, rotation
19. Locking arm, tilting.
20. Serial number label. The serial number stated on
this label is the ID number of the User Interface.
This serial number must always be refered to
when ordering service, spare parts, etc for the
User Interface.
For further information regarding operation of the
User Interface, refer to the User's manual.

Servo-i Ventilator System Introduction
Revision 02 Service Manual 2 - 5
2
When the front panel section is removed from the
rear cover, the following parts are accessible:
1. Touch screen assembly, front cover frame
included.
2. TFT Display.
3. Backlight lamps.
4. PC board Backlight inverter.
5. PC 1777 Panel including PC Card slot.
6. Loudspeaker.
7. Main rotary dial (rotary encoder with switch).
8. Direct access controls (rotary encoder).
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Introduction Servo-i Ventilator System
2 - 6 Service Manual Revision 02
2
SVX9014
Patient Unit
The Patient Unit can be rotated on and pulled out of
the Servo-i Mobile cart. It can also be mounted onto
a Servo-i Holder or a Servo-i Shelf base.
Items accessible from the outside of the Patient Unit
are shown in the illustration above.
1. Handle.
2. Gas inlet for Air.
3. Gas inlet for O2.
4. Equipotentiality terminal.
5. Mains supply connector incl. fuses F11 and F12.
6. Internal fan with filter.
7. Connector for external +12V DC power supply.
8. Fuse F1 for external +12V DC power supply.
9. Optional connector.
10. Control cable connector.
11. 9-pole serial port for data communication
(RS- 232).
12. Expiratory outlet.
13. Inspiratory section cover.
14. Expiratory inlet.
15. Module unit for connecting optional modules,
e. g. up to six Battery modules.
16. Connector for Servo Ultra Nebulizer, Servo-i.
17. Inspiratory outlet.
18. Alarm output connector (optional).
19. Serial number label. The serial number stated on
this label is the ID number of the unit. This serial
number must always be refered to when ordering
service, spare parts, software updates/upgrades,
etc.

Servo-i Ventilator System Introduction
Revision 02 Service Manual 2 - 7
2
When the Patient Unit front cover is removed, the
following parts are accessible:
1. PC 1772 Monitoring.
2. PC 1771 Control.
3. PC 1784 Expiratory channel with the two
connected PC 1781 Inspiratory and Expiratory
Pressure Transducers.
4. Expiratory valve coil.
5. Module unit including PC 1775 Plug-and-play
back-plane.
6. AC/DC Converter.
7. Internal fan.
8. Mains supply inlet.
9. PC 1778 DC/DC & Standard connectors.
10. PC 1785 Expiratory channel connector.
11. PC 1789 Remote alarm connector (optional, not
shown in the illustration).
12. The PC boards, as listed above are directly or
indirectly connected to the PC 1770 Main back-
plane.
13. The gas modules, the O2cell and the safety valve
pull magnet are connected to the PC 1780
Pneumatic back-plane.
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Introduction Servo-i Ventilator System
2 - 8 Service Manual Revision 02
2
The upper part of the Patient Unit contains the
inspiratory section and the expiratory section.
The main parts of the inspiratory section are the:
14. Two gas modules, Air and O2, for regulation of
the inspiratory gas.
15. Connector muff.
16. Inspiratory pipe with housings for the O2cell and
for the safety valve.
17. O2cell incl. bacteria filter.
18. Safety valve.
19. Temperature sensor (inside the O2cell connector).
20. Inspiratory pressure transducer tube incl. bacteria
filter, to connect the inspiratory pressure
transducer.
The expiratory cassette (21) is a complete unit and
must not be disassembled. It contains the following
parts:
• Expiratory inlet with moisture trap.
• PC 1786 Expiratory channel cassette.
• Ultrasonic flowmeter.
• Heating foil to keep a stable temperature in the
expiratory gas.
• Pressure transducer connection, incl. bacteria
filter, to connect the expiratory pressure
transducer.
• Expiratory valve incl. valve membrane.
• Expiratory one-way valve.
The expiratory valve coil, mounted under the
expiratory cassette compartment, controls the valve
membrane in the cassette.
PC 1786 inside the expiratory cassette is electrically
connected to PC 1784 Expiratory channel via
PC 1785 Expiratory channel connector.
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Servo-i Ventilator System Introduction
Revision 02 Service Manual 2 - 9
2
PC1777 PANEL
PC1784
PC1771
PC1772
PANEL S/W
BREATHING
SW
SVX9143
PC1770
SYSTEM ID
SW
MONITORING
SW
Servo-i software structure
General
The Servo-i SW installed in the ventilator will contain
all available system functionality. The software is
separated into different subsystems and stored on
some of the PC boards. The separation of the
software is handled by the installation program.
The Servo-i software is divided into the following
software subsystems:
• Breathing
• Monitoring
• Panel
• System ID
Breathing
The Breathing SW controls the delivery of gases to
the patient. This subsystem is responsible for the
breathing system, that is:
• Ventilation control and regulation
• Inspiratory channel
• Expiratory channel
• Nebulizer control (software option)
The Breathing SW is stored on PC 1771 Control and
PC 1784 Expiratory Channel. New software can be
installed via a System SW Update. The System SW
must be re-installed if PC 1771 or PC 1784 is
replaced.
The Breathing SW is executed by microprocessors
on PC 1771 and PC 1784.
Monitoring
The Monitoring SW controls all monitoring and alarm
functions in the system, including trends of
measured values. Events, such as alarms and
change of settings will also be logged.
The Monitoring SW is stored on PC 1772 Monitoring.
New software can be installed via a System SW
Update. The System SW must be re-installed if
PC 1772 is replaced.
The Monitoring SW is executed by the microprocessor
on PC 1772.
Panel
The Panel SW controls all user interaction, as well as
software updating to all subsystems via the PC
Card-interface.
The Panel SW is stored on PC 1777 Panel. New
software can be installed via a System SW Update.
The System SW must be re-installed if PC 1777 is
replaced.
The Panel SW is executed by the microprocessor on
PC 1777.
System ID
The System ID SW is a configuration file, stored on
PC 1770 Main Back-Plane, that is unique for each
ventilator. The System ID SW will enable the
functions selected for this ventilator.
To change the functions of the ventilator, a new
System ID S/W can be installed via an Option
Upgrade.
When replacing PC 1770 Main Back-Plane, a spare
part that is factory programmed for the concerned
ventilator must be used.

Introduction Servo-i Ventilator System
2 - 10 Service Manual Revision 02
2
Notes

Servo-i Ventilator System Description of functions
Revision 02 Service Manual 3 - 1
3
Only personnel trained and authorized
by Maquet shall be permitted to perform
installation, service or maintenance of
the Servo-i.
Make sure to prepare the Servo-i properly before
disassembling and assembling. Refer to section
'Hazard notices' in chapter 'Important'.
Any service or maintenance must be noted in a
log book.
Discard disposable, replaced and left-over parts
in accordance with appropriate industrial and
environmental standards.
After any installation, maintenance or service
intervention in the Servo-i, perform a 'Pre-use
check'. Refer to the 'Servo-i Ventilator System –
User's Manual' for details.
3. Description of functions
About this chapter ............................................. 3 - 2
Memory types used in the Servo-i .................... 3 - 2
User Interface .................................................... 3 - 2
User Interface controls ................................... 3 - 2
PC 1777 Panel ................................................ 3 - 2
Loudspeaker ................................................... 3 - 2
Backlight Inverter ........................................... 3 - 2
Touch screen assembly ................................. 3 - 2
TFT Display with Backlight ............................ 3 - 2
Patient unit ......................................................... 3 - 3
Inspiratory section .......................................... 3 - 3
Expiratory section .......................................... 3 - 6
PC 1770 Main back-plane ............................. 3 - 7
Pressure transducers ..................................... 3 - 7
PC 1784 Expiratory Channel .......................... 3 - 8
PC 1771 Control ............................................. 3 - 8
PC 1772 Monitoring ....................................... 3 - 8
Power supply .................................................. 3 - 9
Module unit ..................................................... 3 - 10
Internal fan ...................................................... 3 - 10
Optional PC board slots ................................. 3 - 10
Alarm output connector (optional) ................. 3 - 10
Battery modules (optional) ............................. 3 - 10
CO2Analyzer module (optional) ..................... 3 - 10
Control cable ..................................................... 3 - 10

Description of functions Servo-i Ventilator System
3 - 2 Service Manual Revision 02
3
About this chapter
This text refers to the Functional Main Blocks
diagram in chapter 'Diagrams'.
Memory types used in the Servo-i
There are four different types of memories used in
the Servo-i:
• Flash memory. For software storage. Can be
upgraded / updated via a System SW Update.
Present on PC 1771, PC 1772, PC 1777 and
PC 1784.
• RAM. For temporary storage of software and data.
Present on PC 1771, PC 1772 and PC 1777.
• Non-volatile memory. RAM with battery back-up.
For settings, trends and logs. Present on PC 1771
and PC 1772.
• EEPROM. For PC board information, configuration,
calibration data, etc. Present on almost all PC
boards and in the O2cell.
User Interface
Functional Main Blocks diagram marking: 'U'
User Interface controls
Setting of different parameter input values is made
with the help of the following different interface
devices:
• Main Rotary Dial (rotary encoder with switch).
• Direct Access Control, 4 each (rotary encoders).
• Membrane buttons. Integrated parts of the Touch
screen assembly.
• Touch screen.
PC 1777 Panel
Some features included on PC 1777 Panel are:
• SIMM (Single In-line Memory Module) mounted on
its connector P77. Memory type: SDRAM
• PC Card Slot intended for connection/insert of a
PC Card. PC Cards are used to:
– Download software into the different flash
memories situated on PC-boards marked µP and
into the EEPROM on PC 1770 Main Back-plane.
– Transfer patient and system data for further
transfer to a computer.
– Service purpose.
• Microprocessor on this board includes control of
the functions of the User Interface.
• ID-PROM: The ID information can be read by the
Servo-i.
• On/Off switch: Switch to Power up or Power down
the Servo-i. Refer to section 'Power supply'.
• Connection for PC (P86): Ethernet port intended for
test and service purpose. Connected via a service
cable. For future options.
• Microphone used to monitor of sounds from the
Loudspeaker.
Note: The System SW must be re-installed if PC
1777 is replaced
Loudspeaker
For generation of sound, e.g. alarm. Connected to
P72 on PC 1777 Panel.
The loudspeaker generates different tones with
individual sound volumes. At start-up and during
Pre-use check the function of the loudspeaker is
monitored by the microphone on PC 1777. During
operation it is continuously monitored through
current sensing.
Backlight Inverter
PC board with driving stage for backlight (lamps)
mounted behind the TFT Display. The supply voltage
delivered by the Backlight Inverter is 660 V.
The Backlight Inverter is connected to P73 on
PC 1777 Panel.
Touch screen assembly
The Touch screen implies the touch function of the
front panel screen and is interactive with information
displayed on the TFT Display. The front panel frame
with the touch screen, membrane buttons and DIM
sensor forms the Touch screen assembly and must
be handled as one complete part. The DIM sensor
measures the ambient light and the screen
brightness is automatically adjusted.
TFT Display with Backlight
The TFT Display is a Thin Film Transistor Screen for
color display of picture- and alphanumeric data.
The Backlight consists of two fluorescent tubes
(lamps) mounted behind the TFT Screen. They are
driven from the Backlight Inverter. Estimated lifetime
(with acceptable brightness level) for the lamps is
30.000 hours. Using the Field Service System (FSS),
a time meter for the lamps can be shown. The time
meter must be reset after replacement of the lamps.