Pulmonetic Systems LTV Series User manual

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page i
Revision History
Revision Level Revision Date
Rev. A, ECO 539 May 1999
Rev. B, ECO 740 January 2000
Rev. C, ECO 818 August 2000
Rev. D, ECO 1149 May 2001
Rev. E, ECO 1532 May 2002
Rev. F, ECO 1983 April 2003
Rev. G, ECO 2374 September 2003
Rev. H, ECO 3580 November 2005
Rev. J, ECO 5019 December 2007
Rev. K, ECO 5407 July 2008
Contact Information
Pulmonetic Systems, Inc.
17400 Medina Rd., Suite 100
Minneapolis, Minnesota 55447-1341
Phone: [phone]
Office Fax: [phone]
Customer Care Center Phone: [phone]
Customer Care Center Fax: [phone]
Sales/Marketing E-mail: [email protected]
Customer Care Center E-mail: [email protected]
Pulmonetic Systems Website: http://www.pulmonetic.com
LTV®1000, LTV®950, LTV®900, LTV®800 and LTV®are trademarks belonging to
Pulmonetic Systems, Inc.
Copyright ©2008 Pulmonetic Systems, Inc., Minneapolis, Minnesota.

Page ii LTV®Series Ventilator Service Manual p/n 10665, Rev. K
User/Owner Responsibility
This manual is intended for use only by service personnel who have been trained and
authorized by Pulmonetic Systems. Pulmonetic Systems does not condone or approve of
service activity on its products by untrained and unauthorized personnel. Pulmonetic
Systems is not responsible for any unauthorized repairs or any repairs made by
unauthorized procedures.
Use of an incorrect part or failure to exercise due care in the installation, removal, servicing,
checkout or calibration of parts and equipment may result in damage or malfunction of the
equipment. This may also result in damage to property and injury including death.
The purchaser and installer of these parts shall bear full responsibility and liability for the
above. All maintenance performed within the applicable warranty period must be authorized
in advance by a Pulmonetic Systems’ Service representative in order to retain the warranty
status of the subject unit.
Warranty
Pulmonetic Systems warrants that the LTV®Series ventilator is free from defects in material
and workmanship for a period of one (1) year from the date of shipment, or 8,800 hours as
measured on the usage meter, whichever comes first, with the following limitations:
Patient circuit components, including tubes, exhalation manifold, and other associated
parts are warranted for sixty (60) days from date of shipment.
The internal battery is warranted for ninety (90) days from date of shipment.
Pulmonetic Systems will, at its option, either repair, replace, or issue credit for products that
prove to be defective during the warranty period.
For warranty service or repair, the product must be returned to Pulmonetic Systems or a
service facility designated by Pulmonetic Systems, shipping prepaid by the Buyer.
LIMITATION OF WARRANTY
Ordinary maintenance, as specified in the LTV®Series or LTV®800 Ventilator Operator’s
and Service Manuals, is not covered under the foregoing warranty
The foregoing warranty does not apply to defects resulting from:
1) Improper or inadequate maintenance of the unit;
2) Improper use or misuse of the unit;
3) Unauthorized modifications or repair to the unit;
4) Use of the unit with unauthorized accessories, e.g. external battery or AC adapter.
5) Operation of the unit outside the specified environment.
NO IMPLIED WARRANTIES
This warranty is exclusive. There are no other warranties expressed or implied.
LIMITATION OF LIABILITY
Pulmonetic Systems shall not be liable for loss of profits, loss of use consequential
damages, or any other claim based on breach of warranty. Pulmonetic Systems, Inc.’s
liability for damages of any kind shall be limited to the purchase price of the defective unit.

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page iii
Notices
The LTV®Series ventilator complies with limitations as specified in IEC 601-1-2 for Medical
Products. It does however, use and radiate radio frequency energy.
The function of this machine may be adversely affected by the operation of other nearby
equipment, such as high frequency surgical diathermy equipment, short-wave therapy
equipment, defibrillators or MRI equipment.
Notice to Users
Unsafe Operation - Servicing the LTV®Series ventilator without a complete and thorough
understanding of its attributes may result in unsafe operating conditions. It is important that
this manual be read and understood in its entirety before servicing the ventilator.
Warnings and Cautions Section - Read the section on Warnings and Cautions carefully
before attempting to service or operate the LTV®Series ventilators. General warnings and
cautions which apply any time you use the ventilator are listed in the front of this manual.
General and specific warnings and cautions also appear throughout the text where they are
most meaningful.
Use and Maintenance - Any questions regarding installing, setting up, operating, or
maintaining the LTV®Series ventilators, should be directed to a service technician who has
been trained and certified by Pulmonetic Systems or Pulmonetic Systems, Inc. using the
contact information at the front of this manual.

Page iv LTV®Series Ventilator Service Manual p/n 10665, Rev. K
Contents
Notices .........................................................................................................................................iii
Chapter 1 - Introduction.................................................................................. 1-1
Getting Assistance ....................................................................................................................1-1
Operator’s Safety Information ...................................................................................................1-2
Warnings ...................................................................................................................................1-3
Cautions ....................................................................................................................................1-4
Symbols.....................................................................................................................................1-6
Chapter 2 - Ventilator Checkout Tests .......................................................... 2-1
Alarm Test .................................................................................................................................2-4
Display Test...............................................................................................................................2-5
Control Test...............................................................................................................................2-7
Leak Test...................................................................................................................................2-9
Vent Inop Alarm Test ..............................................................................................................2-11
Exit ..........................................................................................................................................2-12
Chapter 3 - Real Time Transducer Data ........................................................ 3-1
Chapter 4 - Cleaning and Sterilization........................................................... 4-1
Cleaning the Ventilator..............................................................................................................4-1
Cleaning the Exhalation Valve and Reusable Patient Circuit ...................................................4-2
Cleaning the Inlet Filter .............................................................................................................4-7
Cleaning the Fan Filter..............................................................................................................4-8
Chapter 5 - Preventative Maintenance........................................................... 5-1
Recommended Maintenance Schedule ....................................................................................5-1
Before Initial Use.......................................................................................................................5-2
Storage Maintenance ................................................................................................................5-2
Daily Maintenance.....................................................................................................................5-2
Monthly Maintenance ................................................................................................................5-2
10,000 Hour / 2 Year Maintenance ...........................................................................................5-3
30,000 Hour Maintenance / 6 Year Maintenance .....................................................................5-3
Chapter 6 - Maintenance & Calibration.......................................................... 6-1
Operating Theory ......................................................................................................................6-1
Pneumatic Schematic Detail .................................................................................................6-3
Vent Maintenance .....................................................................................................................6-4
Vent Maintenance Entry........................................................................................................ 6-5
Vent Maintenance Entry Alarm .............................................................................................6-5
Calibration .................................................................................................................................6-6
Airway Pressure Calibration..................................................................................................6-7
Calibrate the Airway Pressure Transducers .........................................................................6-9
Flow Differential Calibration ................................................................................................6-11
Valve Differential Calibration...............................................................................................6-14
O2Inlet Pressure Calibration...............................................................................................6-17
Motor Drive Calibration .......................................................................................................6-19
Measure Turbine Speed (T/S).............................................................................................6-21
Vent Maintenance Exit ........................................................................................................6-23
Calibration Worksheet.........................................................................................................6-24
Flow Valve Calibration ............................................................................................................6-25
Flow Valve Calibration Worksheet ......................................................................................6-29
Servo .......................................................................................................................................6-30
Solenoid ..................................................................................................................................6-32
Step Test .................................................................................................................................6-33
Watchdog Test ........................................................................................................................6-34

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page v
Configuration .......................................................................................................................... 6-35
Model Selection ...................................................................................................................... 6-36
Flow Valve Home Position...................................................................................................... 6-37
Temperature Compensation................................................................................................... 6-39
Analog Board Setting.............................................................................................................. 6-40
O2Blender .............................................................................................................................. 6-42
Configuration Menu Exit .........................................................................................................6-43
CLEAR.................................................................................................................................... 6-44
Vent Maintenance Menu Exit.................................................................................................. 6-45
Chapter 7 - Troubleshooting...........................................................................7-1
Displays and Buttons................................................................................................................ 7-2
Ventilator Performance............................................................................................................. 7-6
Advanced Vte Diagnostic Procedures.................................................................................... 7-22
Advanced FiO2Diagnostic Procedures .................................................................................. 7-26
Power and Battery Operation ................................................................................................. 7-28
Alarms..................................................................................................................................... 7-31
Checkout Test Failures........................................................................................................... 7-37
Test Lung Operation............................................................................................................... 7-41
Chapter 8 - Component Removal and Replacement.....................................8-1
Training and Authorization........................................................................................................ 8-1
Service Record ......................................................................................................................... 8-1
Tools ......................................................................................................................................... 8-2
Calling for Assistance ............................................................................................................... 8-2
Before removing the back panel............................................................................................... 8-3
Before replacing the back panel ............................................................................................... 8-3
After performing any maintenance ........................................................................................... 8-3
Boots, Protective....................................................................................................................... 8-4
Boots, Temporary Removal.................................................................................................. 8-5
Boots, Permanent Removal.................................................................................................. 8-7
Boots, Reinstallation...........................................................................................................8-10
Boots, New Installation ....................................................................................................... 8-13
LTM/LTV mounting assembly installation and removal.......................................................... 8-16
LTM mounting assembly temporary removal (current LTMs) ............................................ 8-17
LTM mounting assembly permanent removal (current LTMs) ........................................... 8-18
LTM mounting assembly re-installation (current LTMs) .............................................. 8-18
LTM mounting assembly re-installation (current LTMs) .............................................. 8-19
LTM mounting assembly installation (current LTMs)................................................... 8-21
LTM/ LTV® mounting bracket (earlier model LTMs) ........................................................... 8-24
LTM/LTV mounting bracket temporary removal (earlier model LTMs)............................... 8-25
LTM/LTV mounting bracket permanent removal (earlier model LTMs).............................. 8-26
LTM/LTV®mounting bracket, reinstallation (for earlier model LTMs) ................................ 8-27
LTM/LTV®mounting bracket installation (earlier model LTM)............................................ 8-29
Back Panel.............................................................................................................................. 8-31
Back Panel, Removal ......................................................................................................... 8-31
Dovetail Mounting Bracket, Replacement .......................................................................... 8-32
Back Panel, Reinstallation.................................................................................................. 8-35
Internal Flexible Tube Routing Configurations ....................................................................... 8-39
LTV®900, 950 and 1000 Current Version Tube Routing Diagrams................................... 8-40
LTV®900, 950 and 1000 Earlier Version Tube Routing Diagrams .................................... 8-42
LTV®800 Current and Earlier Tube Routing Diagram ....................................................... 8-43
LTV®800 Current and Earlier Tube Routing Diagram ....................................................... 8-44
Alarm Sounder Assembly ....................................................................................................... 8-45
Analog Board Assembly ......................................................................................................... 8-48
External Inlet Filter.................................................................................................................. 8-51
Fan Assembly ......................................................................................................................... 8-52
Cleaning the Fan Filter ....................................................................................................... 8-54

Page vi LTV®Series Ventilator Service Manual p/n 10665, Rev. K
Flow Valve Assembly and Cleaning Instructions ....................................................................8-55
Front Panel..............................................................................................................................8-64
Internal Battery Pack...............................................................................................................8-69
Internal Inlet Filter ...................................................................................................................8-72
Main Board Assembly .............................................................................................................8-73
Memory Board.........................................................................................................................8-77
Checking the O2 Blender when upgrading software ..........................................................8-79
Motor Board Assembly............................................................................................................8-80
O2Blender Assembly / O2Inlet Block .....................................................................................8-82
O2Blender Filter......................................................................................................................8-89
O2 Blender Cap (LTV 1000 Only)...........................................................................................8-90
O2 Port Cap (Low Pressure)...................................................................................................8-91
Power Board Assembly...........................................................................................................8-92
Right and Left Soft Side Panels ............................................................................................8-102
Rotary Switch (Set Value Knob) Assembly...........................................................................8-103
Solenoid Manifold Assembly .................................................................................................8-105
Thermo Conductive Motor Board Heatsink Pad ...................................................................8-107
Thermo Conductive Turbine Pad ..........................................................................................8-108
Turbine Manifold ...................................................................................................................8-109
Chapter 9 - Final Checkout Test..................................................................... 9-1
Checkout Test Selection ...........................................................................................................9-1
General Checkout .....................................................................................................................9-2
General Checkout Worksheet ...............................................................................................9-8
Power Checkout......................................................................................................................9-12
Power Checkout Worksheet................................................................................................9-14
Performance Checkout ...........................................................................................................9-16
Performance Checkout Worksheet .....................................................................................9-25
24 Hour Burn-in.......................................................................................................................9-30
24 Hour Burn-in Worksheet.................................................................................................9-31
Appendix A - Ventilator Specifications .........................................................A-1
Appendix B - Glossary....................................................................................B-1
Appendix C - Service Record Form ...............................................................C-1
Appendix D - Event Trace...............................................................................D-1
Event Codes............................................................................................................................. D-3
Event Codes by Code # ....................................................................................................... D-3
Event Codes by Event Name............................................................................................... D-6
Event Trace Data Definitions ............................................................................................... D-9
Appendix E - Reference Information ............................................................. E-1
Conversion Factors .................................................................................................................. E-1
Extended Features Map...........................................................................................................E-2
Extended Features Map (continued)........................................................................................ E-3
External Accessories Screw Location, Type and Length......................................................... E-4
Input O2Flow Chart.................................................................................................................. E-6
Parts, Replacement.................................................................................................................. E-8
Settings, Dip Switch ............................................................................................................... E-12
Settings, Front Panel Controls and Extended Features ........................................................ E-13
Tools, Required...................................................................................................................... E-14
Transducer Calibration, Acceptable A/D Counts ................................................................... E-15
Torque Values........................................................................................................................ E-16
Appendix F - Index .......................................................................................... F-1

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page 1-1
Chapter 1 - I NTRODUCTION
This manual describes how to perform routine maintenance, troubleshooting, and repairs on
the LTV®Series ventilator. It is designed for use by service personnel who have been
trained and authorized by Pulmonetic Systems. Do not perform any of the procedures in
this manual unless you are trained and authorized for service on the LTV®Series
ventilators.
This manual contains what you need to know to:
1) Perform preventative maintenance.
2) Calibrate the ventilator.
3) Perform routine troubleshooting.
4) Remove and replace major components of the ventilator.
See the LTV®Series or LTV®800 Ventilator Operator's Manual for more information on
setting up and operating the ventilator.
Getting Assistance
If a problem occurs while maintaining the LTV®Series ventilator or if you require additional
information, contact a service technician who has been trained and certified by Pulmonetic
Systems or Pulmonetic Systems, Inc. at:
Pulmonetic Systems, Inc.
17400 Medina Rd., Suite 100
Minneapolis, Minnesota 55447-1341
Phone: [phone]
Office Fax: [phone]
Customer Care Center Phone: [phone]
Customer Care Center Fax: [phone]
Sales/Marketing E-mail: [email protected]
Customer Care Center E-mail: [email protected]
Pulmonetic Systems Website: http://www.pulmonetic.com

Page 1-2 LTV®Series Ventilator Service Manual p/n 10665, Rev. K
Operator’s Safety Information
All Operators are to read and understand the following information about Warning, Caution
and Note statements before operating the LTV®Series ventilator.
General warnings and cautions which apply any time you use the ventilator are listed here.
General and specific warnings and cautions also appear throughout this manual where they
are most meaningful.
WARNING
“Warning” statements contain information about circumstances or practices that may cause
serious and undesirable results, or expose the patient or operator to danger.
CAUTION
“Caution” statements contain information about circumstances or practices that may result
in equipment damage.
Note
“Note” statements contain additional information to assist in the proper operation of the
LTV®Series ventilators.

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page 1-3
Warnings
WARNING
WARNING
Ventilator Service and Repair - Only service technicians who have been trained and
certified by Pulmonetic Systems, Inc. are authorized to perform repairs or maintenance on
the LTV® series ventilators. Do not attempt to repair or replace any part of the ventilator
unless you are trained and certified to do so by Pulmonetic Systems. Personal injury could
result.
Fire or Explosion - Operation of the LTV®Series ventilators in the presence of flammable
gases could cause a fire or explosion. Under no circumstances is the ventilator to be
operated when explosive gases are present. The presence of nitrous oxide or flammable
anesthetics presents a danger to the patient and operator.
Untrained Personnel – Only properly trained personnel should operate the ventilator. The
LTV®Series ventilator is a restricted medical device designed for use by Respiratory
Therapists or other properly trained and qualified personnel under the direction of a
physician and in accordance with applicable state laws and regulations.
Unauthorized Parts or Accessories – Serious harm to the patient may result from the use
of unauthorized parts or accessories. Only items expressly approved by Pulmonetic
Systems may be used in conjunction with the LTV®Series ventilators.
Ventilator Checkout Tests – Be aware that gas is not delivered to the patient during these
tests. Disconnect the patient from the ventilator and ventilate the patient using an alternative
method before running the Ventilator Checkout tests.
Ventilator Checkout and Maintenance Modes - The LTV®Series ventilator does not
deliver gas during the Ventilator Checkout mode (VENT CHECK) or Ventilator Maintenance
mode (VENT MTNCE) and should not be used to ventilate a patient during these tests.
Mounting Screw Use – Internal damage to the ventilator may result if wrong length
mounting screws are used to secure parts or accessories. Refer to the information
contained in Replacement Screws Kit, P/N 11149, to determine the appropriate accessories
mounting screws or accessories replacement screws to use when removing or exchanging
external accessories on an LTV®Series ventilator.
Patient Circuits – Pulmonetic Systems Patient Circuits, Exhalation Valve Assemblies and
Water Traps are shipped clean, not sterile.
Ultra Violet Light Sensitivity – The material used in the tubing of the “Reusable” Patient
Circuits is not UV stable. Avoid exposure of tubing to UV light.
PEEP Valve Rotation – Attempting to adjust the PEEP valve counterclockwise past zero (0)
may damage the PEEP valve assembly and cause circuit leaks.
To avoid damaging the PEEP valve, always depress the yellow lock button on top of the
valve when making adjustments.

Page 1-4 LTV®Series Ventilator Service Manual p/n 10665, Rev. K
Cautions
CAUTION
Electrical Grounding – In the event of a loss of electrical protective ground, touching the
ventilator could result in electrical shock. To ensure grounding and avoid this danger, use
only the unmodified power cord originally supplied with the LTV®Series ventilators,
maintained in good condition and connected to a properly wired and grounded electrical
power outlet.
Fuse Fire Hazard – Replacement of existing fuses with fuses with different voltage or
electrical current ratings may cause a fire.
Storage Temperature - Storing the LTV®Series ventilator at temperatures above 60°C
(140°F) for long periods can damage the internal battery and cause expected battery
duration to degrade.
Patient Assist Call Connector – Do not apply more than 25V rms or 32VDC to the Patient
Assist Call connector.
CLEAR Function Cautions - The CLEAR function should be used with great care as once
a section of the memory is cleared, all data in that section of memory is lost and it cannot be
automatically restored.
Electronic and Mechanical Parts - The LTV®Series ventilator contains delicate electronic
and mechanical parts that must be handled properly to avoid damage. Follow the
instructions given in this manual carefully and make sure to observe all instructions.
Opening the ventilator - Always turn the ventilator OFF and remove the external power
before opening the ventilator case or attempting to service the ventilator.
Anti-static Precautions - Always wear a grounded anti-static wrist strap when handling the
ventilator with the case open. Electrostatic discharge can damage the internal electronics.
Verification of Operation - After opening the ventilator and performing any maintenance,
verify proper operation of the ventilator by performing the checks and calibrations
recommended in Chapter 9 - Final Checkout Test.
Ventilator Sterilization – To avoid irreparable damage to the LTV®Series ventilator, do not
attempt to sterilize it.
Cleaning Agents – To avoid damaging the ventilator’s plastic components and Front Panel,
do not use cleaning agents containing ammonium chloride, other chloride compounds, more
than 2% glutaraldehyde, phenols, or abrasive cleaners.

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page 1-5
CAUTION
Ventilator Immersion - Do not immerse the ventilator in liquids.
High pressure air nozzle – Only a low-pressure air nozzle with flow less than 10 liters per
minute should be used around the ventilator. High pressure can damage the ventilator, in
particular the differential pressure ports.
Exhalation Valve - Do not pour or spray liquids into the exhalation valve.
Patient Wye Installation – Always install the patient wye in the patient circuit so the
proximal sense lines are oriented up while operating.
Front Panel – Do not pour or spray liquids onto the Front Panel.
Care of Bacterial Filters – If bacterial filters are used in conjunction with the LTV®Series
ventilator, comply with all recommended care procedures as specified by the filter
manufacturer.
Wet or Damp Filters - Do not install any wet or damp filters into the LTV®Series ventilators.
This could damage the ventilator.
Proximal Sense Lines - Do not remove the proximal sense lines from the patient wye.
Software Caution – Never install a version of software lower than the version originally
installed in the ventilator. Erroneous operation may result from the installation of an
incompatible software version. Generally, LTV®ventilator software is designed to be
backwards-compatible with this exception.

Page 1-6 LTV®Series Ventilator Service Manual p/n 10665, Rev. K
Symbols
Symbol Compliance1Title Application
ISO 3864
(Prev. IEC 348)
Symbol No.
B.3.1
Caution (refer to
accompanying
documents)
Direct the user to the instruction
manual where it is necessary to follow
certain specified instructions where
safety is involved.
IEC 417
Symbol No. 417-
IEC-5016
Fuse Indicates the location of fuses.
IEC 417
Symbol No. 417-
IEC-5035
Output Identifies an output terminal when it is
necessary to distinguish between
inputs and outputs.
IEC 417
Symbol No. 417-
IEC-5019
Protective earth
(ground)
To identify any terminal which is
intended for connection to an external
protective conductor for protection
against electric shock in case of a fault
or the terminal of a protective earth
(ground) electrode.
IEC 417
Symbol No. 417-
IEC-5333
Type BF equipment. To mark type BF equipment complying
with IEC Publication 601.
IEC 417
Symbol No. 417-
IEC-5031
Direct Current Indicates on the rating plate that the
equipment is suitable for direct current
only; to identify relevant terminals.
IEC 417
Symbol No. 417-
IEC-5032
Alternating current Indicates on the rating plate that the
equipment is suitable for alternating
current only; identifies relevant
terminals.
IEC 417
Symbol No. 417-
IEC-5172
Class II equipment To identify equipment meeting safety
requirements specified for Class II
equipment.
IEC 60417
Symbol No.
5182
Sound; audio Identifies controls or terminals related
to audio signals.
1Reference IEC Medical Electrical Equipment, 2nd. Edition 1988

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page 2-1
Chapter 2 - V ENTILATOR C HECKOUT T ESTS
This chapter details five test procedures that are initiated through the Vent Check menu and
used to verify the proper operation of the LTV®Series ventilator. These Checkout Tests are
to be performed before using the ventilator on a patient and in accordance with
recommended periodic maintenance and testing of the ventilator. See Chapter 5 -
Preventative Maintenance.
The five test procedures are:
Test Test used to:
Alarm Test Verify that the audible alarm is working correctly.
Display Test Verify that the ventilator displays are working correctly.
Control Test Verify that the ventilator buttons and the Set Value knob are
working correctly.
Leak Test Test the patient circuit for leaks.
Vent Inop Alarm Test Verify that the Inop alarm is working correctly.
The Vent Check Menu is set up as follows:
VENT CHECK
ALARM
DISPLAY
CONTROL
LEAK
EXIT
WARNING
Ventilator Checkout and Maintenance Modes - The LTV®Series ventilator does not
deliver gas during the Ventilator Checkout mode (VENT CHECK) or Ventilator Maintenance
mode (VENT MTNCE) and should not be used to ventilate a patient during these tests.

Page 2-2 LTV®Series Ventilator Service Manual p/n 10665, Rev. K
To enable the Ventilator Checkout menu:
To enter the Ventilator Checkout (VENT CHECK) menu, a special power on sequence is
required.
1) Disconnect the patient from the ventilator and ventilate using an alternative method.
2) With the ventilator off, connect the AC Adapter to the ventilator and plug it in to a valid
AC power source. Verify that the External Power and Charge Status LEDs are
illuminated or flashing.
3) Press and hold down the Select button. While holding the Select button, press the
On/Standby button to turn the ventilator on.
•REMOVE PTNT is displayed; if it does not display, repeat steps 2 through 4.
•An audible alarm (alternating on/off tone) will sound while REMOVE PTNT is
displayed.
Note
Although the LTV®1000 Front Panel is shown, the test is applicable to all LTV®Series
ventilators.

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page 2-3
4) Clear the alarm by pressing the Silence/Reset button.
•The audible alarm silences, and the display changes from REMOVE PTNT to
VENT CHECK.
To enter the Ventilator Checkout menu:
1) Push the Select button.
2) The first Ventilator Checkout Test, ALARM is displayed.
Note
Although the LTV®1000 Front Panel is shown, the test is applicable to all LTV®Series
ventilators.

Page 2-4 LTV®Series Ventilator Service Manual p/n 10665, Rev. K
Alarm Test
The alarm test verifies that the audible alarm is working correctly.
To run the alarm test:
1) Press the Select button while ALARM is displayed.
2) Verify that the audible alarm is sounded.
3) When the alarm has sounded for at least 2 seconds, push the Select button again.
•The audible alarm is silenced and the next menu item is displayed.
4) Verify a confirming audible chirp occurs after the alarm is silenced.
Note
Although the LTV®1000 Front Panel is shown, the test is applicable to all LTV®Series
ventilators.
If the ventilator fails the alarm test, see Chapter 7 - Troubleshooting for more information.

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page 2-5
Display Test
At the end of the Alarm test, DISPLAY shows in the LED display window. The display test
verifies that the ventilator displays are working correctly.
To run the Display Test:
1) Press the Select button while DISPLAY is showing.
2) All segments of the 7-segment control displays; all dots of the dot-matrix window
displays and all LEDs are illuminated.
Note
Although the LTV®1000 Front Panel is shown, the test is applicable to all LTV®Series
ventilators.
3) To end the display test, press the Select button again and the next menu item is
displayed.
Note
The displays for the External Power, Vent Inop, and Charge Status LEDs are not tested
by the Display Test.
•The External Power and Charge Status LEDs are tested when the AC adapter is
connected to the ventilator (see page 2-2).
•The Vent Inop LED is tested during the Vent Inop alarm test (see page 2-2).

Page 2-6 LTV®Series Ventilator Service Manual p/n 10665, Rev. K
Displays will be illuminated in the following colors:
Display Color Display Color
Airway Pressure Display Green Pressure Mode LED2Green
Display Window Red Assist/Control Mode LED Green
Breath Rate Green SIMV/CPAP Mode LED Green
Tidal Volume Green NPPV Mode LED Green
Pressure Control2Green Inspiratory / Expiratory Hold LED3Green
Inspiratory Time Green Manual Breath LED Green
Pressure Support Green Low Pressure O2Source LED3Green
O2%3Green Control Lock LED Green
Sensitivity Green Patient Effort LED Green
High Pressure Limit alarm Red External Power LED Not tested
Low Pressure alarm Red Charge Status LED Not tested
Low Minute Volume alarm Red Battery Level LED Amber
On/Standby LED Green Vent Inop LED Not tested
Volume Mode LED3Green Silence Reset LED Red
If the ventilator fails the Display Test, see Chapter 7 - Troubleshooting for more information.
2Not applicable to the LTV®900 or 800
3Applicable to the LTV®1000 only

p/n 10665, Rev. K LTV®Series Ventilator Service Manual Page 2-7
Control Test
At the end of the Display test, CONTROL shows in the LED display window. The Control
Test is used to verify that the ventilator buttons and the Set Values knob are working
correctly.
To run the Control Test:
1) Press the Select button while CONTROL is displayed.
2) SELECT is displayed in the display window.

Page 2-8 LTV®Series Ventilator Service Manual p/n 10665, Rev. K
Note
Although the LTV®1000 Front Panel is shown, the test is applicable to all LTV®Series
ventilators.
3) Test each control by pressing every button, one at a time. When each one is pressed,
verify that the name of the button is displayed in the display window.
Control names are as shown in the table below:
Control Display
Display Select SELECT
Breath Rate BREATH RATE
Tidal Volume TIDAL VOLUME
Pressure Control4PRES CONTROL
Inspiratory Time INSP TIME
Pressure Support PRES SUPPORT
O2%5O2%
Sensitivity SENSITIVITY
High Pressure Alarm HIGH PRES
Low Peak Pressure LOW PRES
Low Minute Volume LOW MIN VOL
Silence / Reset SILENCE
On/Standby ON / STNDBY
Volume & Pressure4MODE VOL/PRS
Assist/Control & SIMV/CPAP MODE A/C S/C
Inspiratory / Expiratory Hold5IE HOLD
Manual Breath MANUAL BRTH
Low Pressure O2Source5LOW PRES O2
Control Lock CONTROL LOCK
Set Value Knob rotate Left ROTATE LEFT
Set Value Knob rotate Right ROTATE RIGHT
4) Test the Set Value knob by turning it clockwise and counterclockwise. Verify that the
direction of rotation is displayed in the display window.
5) To exit the control test, press the Select button again and the next menu item is
displayed.
If the ventilator fails the Control Test, see Chapter 7 - Troubleshooting for more information.
4Not applicable to the LTV®800 and 900
5LTV 1000 only