Tyco KnightStar 330 User manual

Bi-Level®Ventilator
KnightStar®330 Service Manual
manual 4-070089-00 Rev. B (10/02)
Y-102942-00A Rev G
March, 2004

© Copyright 2004 Nellcor Puritan Bennett Inc. All rights reserved.
KnightStar, Bi-Level, SoftFit, ADAM, and Breeze are trademarks of Nellcor Puritan Bennett Inc. For more information, contact
your Puritan Bennett representative.
The ventilator should be operated and serviced only by trained professionals. Puritan Bennett’s sole responsibility with respect
to the ventilator, and its use, is as stated in the limited warranty provided.
Nothing in this manual shall limit or restrict in any way Puritan Bennett’s right to revise or otherwise change or modify the
equipment (including its software) described herein, without notice. In the absence of an express, written agreement to the
contrary, Puritan Bennett has no obligation to furnish any such revisions, changes, or modifications to the owner or user of
the equipment (including its software) described herein.
Manufacturer: Authorized Representative:
Puritan-Bennett Corporation Tyco Healthcare UK Limited
4280 Hacienda Drive 154 Fareham Road
Pleasanton, CA 94588 USA Gosport PO13 0AS, U.K.
Toll Free: 1.800.635.5267

SECTION
i
CONTENTS
1
General information
1.1 Safety considerations...................................................................................................1-1
1.2 Electromagnetic susceptibility......................................................................................1-2
1.3 Customer assistance ....................................................................................................1-2
1.4 How to use this manual...............................................................................................1-2
1.4.1 Definitions...........................................................................................................1-3
1.4.2 Using the manual to troubleshoot the KnightStar 330..........................................1-3
1.5 General product description ........................................................................................1-3
1.6 Configuration information...........................................................................................1-4
1.7 Accessories ..................................................................................................................1-4
1.8 Specifications ..............................................................................................................1-5
1.9 Compliance and approvals ..........................................................................................1-8
1.10 Breathing modes and settings ..................................................................................1-9
1.11 Initial factory settings .............................................................................................1-11
1.12 Controls, indicators, and symbols ............................................................................1-12
1.13 Onscreen symbols and abbreviations.......................................................................1-21
1.14 Ventilator serial numbers and software version ........................................................1-22
1.15 Tools, equipment, and service materials ..................................................................1-22
1.16 Periodic maintenance .............................................................................................1-24
1.17 Spare parts ..............................................................................................................1-24
1.18 Service philosophy ..................................................................................................1-25
2
Theory of operation
2.1 Ventilator components ................................................................................................2-1
2.2 Operational overview ..................................................................................................2-2
2.2.1 Operating modes ................................................................................................2-3
2.2.2 Breathing modes .................................................................................................2-4
2.3 Breath delivery ............................................................................................................2-5
2.4 Breath detection..........................................................................................................2-6
2.4.1 Expiratory sensitivity............................................................................................2-6
2.4.2 Inspiratory sensitivity ...........................................................................................2-7
2.4.3 Rise time .............................................................................................................2-7
2.5 External battery operation ...........................................................................................2-8
2.6 Safety features .............................................................................................................2-9
2.6.1 Overcurrent protection........................................................................................2-9
2.6.2 Controls protection .............................................................................................2-9
2.6.3 Power off protection............................................................................................2-9
2.6.4 Maximum pressure..............................................................................................2-9
2.6.5 Audible alarms.....................................................................................................2-9
2.6.5.1 High priority alarm ....................................................................................2-9
KnightStar 330 Service Manual Y-102942-00A Rev. G (03/04)

Contents
ii Y-102942-00A Rev. G (03/04) KnightStar 330 Service Manual
2.6.5.2 Medium priority alarm ............................................................................ 2-10
2.6.5.3 Low priority alarm................................................................................... 2-10
2.6.5.4 Alarm control .......................................................................................... 2-10
3
Performance verification
3.1 Initial ventilator cleaning and inspection ..................................................................... 3-1
3.2 System set-up ............................................................................................................. 3-1
3.3 Performance verification tests...................................................................................... 3-3
3.3.1 Functional performance tests .............................................................................. 3-3
3.3.1.1 Self tests.................................................................................................... 3-3
3.3.1.2 Blower test................................................................................................ 3-3
3.3.1.3 Leak alarm test.......................................................................................... 3-4
3.3.1.4 Sensitivity test ........................................................................................... 3-4
3.3.1.5 Pressure test .............................................................................................. 3-5
3.3.1.6 Delay sequence test .................................................................................. 3-5
3.3.1.7 Low pressure alarm test............................................................................. 3-5
3.3.1.8 High pressure alarm test............................................................................ 3-6
3.3.1.9 Power failure indicator test........................................................................ 3-6
3.3.1.10 Autoclear procedure.................................................................................. 3-6
3.4 KnightStar 330 performance verification checklist........................................................ 3-7
4
Troubleshooting
4.1 Alarms ........................................................................................................................ 4-1
4.2 Troubleshooting checklist ........................................................................................... 4-3
4.3 Internal malfunction errors.......................................................................................... 4-7
4.4 Logged errors ........................................................................................................... 4-11
5
Repair
5.1 Tools, test equipment, and service materials ............................................................... 5-1
5.2 Ventilator cleaning and inspection .............................................................................. 5-1
5.3 Ventilator assembly drawing ....................................................................................... 5-1
5.4 Initial ventilator disassembly ....................................................................................... 5-2
5.5 Membrane switch replacement................................................................................... 5-4
5.6 LCD panel replacement............................................................................................... 5-5
5.7 Alarm PCBA replacement ............................................................................................ 5-5
5.8 Cooling fan assembly replacement.............................................................................. 5-9
5.9 Ventilator reassembly ................................................................................................ 5-10
5.10 Post-repair testing ................................................................................................... 5-10
6
Warranty and service information
6.1 Limited warranty......................................................................................................... 6-1
6.2 Service information ..................................................................................................... 6-1

1
SECTION
SECTION
1-1
General information 1
This manual provides information needed to service the Puritan Bennett KnightStar 330®Bi-
Level®ventilator and is intended for use by certified biomedical engineering technicians or
personnel with equivalent experience and training in servicing this type of equipment.
This section provides introductory information on the KnightStar 330 ventilator including:
• General safety information
• Instructions on how to use the manual
• A description of the ventilator, its accessories, and its controls and indicators
• Detailed specifications and required tools and test equipment used for service and repair
1.1 Safety considerations
Please take the time to familiarize yourself with the following caveats as they cover safety
considerations, special handling requirements, and regulations that govern the use of the
KnightStar 330 ventilator.
• To ensure proper servicing and avoid the possibility of physical injury, only qualified
personnel (minimum requirement Certification for Biomedical Equipment Technician or
equivalent) should attempt to service or make authorized modifications to the ventilator.
The user of this product shall have sole responsibility for any ventilator malfunction
due to operation or maintenance performed by anyone not trained by Puritan Bennett
staff.
• To avoid an electrical shock hazard while servicing the ventilator, be sure to remove all
power to the ventilator by turning off the ventilator power switch and disconnecting the
power source.
• To avoid a fire hazard, keep matches, lighted cigarettes, and all other sources of ignition
(e.g., flammable anesthetics and/or heaters) away from the KnightStar 330 and oxygen
hoses.
Do not use oxygen hoses that are worn, frayed, or contaminated by combustible materials
such as grease or oils. (Textiles, oils, and other combustibles are easily ignited and burn
with great intensity in air enriched with oxygen.)
In case of fire or a burning smell, immediately disconnect the ventilator from the oxygen
supply, and the power source.
• When handling any part of the KnightStar 330, always follow your hospital infection
control guidelines for handling infectious material.
Puritan Bennett recognizes that cleaning, sterilization, sanitation, and disinfection
practices vary widely among healthcare institutions. It is not possible for Puritan Bennett
to specify or require specific practices that will meet all needs, or to be responsible for the
effectiveness of cleaning, sterilization, and other practices carried out in the patient care
setting. Specific cleaning instructions for the KnightStar 330 are given in section 5.2 on
page 1.
Puritan Bennett recommends that users of its products that require cleaning and
sterilization/disinfection consider the Center for Disease Control (CDC) publication:
KnightStar 330 Service Manual Y-102942-00A Rev. G (03/04)

1General information
1-2 Y-102942-00A Rev. G (03/04) KnightStar 330 Service Manual
Guidelines for Prevention of Nosocomial Pneumonia available from the CDC Web site:
http://www.cdc.gov/publications.htm. Refer to the table on page 1-23 for a list of
approved disinfectants and cleaning agents.
• Patients on ventilation equipment should be appropriately monitored by competent
medical personnel and suitable monitoring devices.
• For a thorough understanding of ventilator operations, be sure to thoroughly read this
manual and the KnightStar 330 Clinician’s Manual before operating the device. These
manuals provide service, repair, and technical information concerning the operation and
performance of the ventilator.
• Before patient use, be sure to check the equipment for proper operation.
• Do not use sharp objects to make selections on the keypad.
• Check the ventilator periodically as outlined in this manual; do not use if defective.
Immediately replace parts that are broken, missing, obviously worn, distorted, or
contaminated.
• Federal law (U.S.) restricts this device to sale by or on the order of a physician.
1.2 Electromagnetic susceptibility
The KnightStar 330 equipment has been tested and found to comply with the limits for
medical devices to IEC 60601-1-2:2001 (or Medical Device Directive 93/42/EEC). This testing
shows that the device provides reasonable protection against harmful interference in a typical
medical installation. There is, however, no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to other devices or
is negatively affected by other devices, the user is encouraged to try to correct the interference
by one or more of the following measures:
• Re-orient or relocate the devices
• Increase the separation between the devices
• Connect the equipment to an outlet on a different circuit
• Contact the manufacturer or your local representative for help
1.3 Customer assistance
For further assistance, or for questions regarding the applicability of the information in this
manual, contact Puritan Bennett Technical Support at 1.800.255.6774 (within the USA) or
your local Puritan Bennett representative (outside the USA).
1.4 How to use this manual
While this manual covers the ventilator configurations currently supported by Puritan
Bennett, some product upgrades may be available prior to a corresponding revision of this
manual. The current revision of this manual is available on the Internet at:
http://www.mallinckrodt.com/respiratory/resp/Serv_Supp/PBProductManuals.html.
Puritan Bennett recommends that you become familiar with this manual and the KnightStar
330 Clinician’s Manual before attempting to operate or service the ventilator. These manuals
provide service, repair, and technical information concerning the operation and performance
of the Puritan Bennett KnightStar 330 bi-level ventilator.

General information 1
KnightStar 330 Service Manual Y-102942-00A Rev. G (03/04) 1-3
1.4.1 Definitions
This manual uses three special indicators to convey information of a specific nature.
They include:
Warning
Indicates a condition that can endanger the patient or the ventilator operator.
Caution
Indicates a condition that can damage the equipment or other property.
NOTE:
Indicates points of particular interest that make operation of the ventilator more efficient or
convenient.
1.4.2 Using the manual to troubleshoot the KnightStar 330
NOTES:
• At a minimum, the repair technician should be a Certified Biomedical Equipment
Technician (CBET) or possess equivalent experience and training before performing
any of the service instructions described in this manual
• Due to specific design interactions between the Main PCBA, blower, and pitot
tube, individual field replacement of any of these parts is not possible. If required,
please return the KnightStar 330 to a Puritan Bennett factory service center for
repair.
1Refer to Section 4 of this manual to diagnose the problem. Using the troubleshooting
guides in this section, determine if the problem can be corrected without returning the
device to a factory service center.
2Use Table 1-14 to identify and order the required service parts.
3Follow instructions in Section 5 to disassemble, repair, and reassemble the KnightStar
330.
4Perform and document performance verification tests described in Section 3.
1.5 General product description
The Puritan Bennett KnightStar 330 is a continuous, bi-level ventilator that provides
noninvasive ventilation for the treatment of respiratory insufficiency and obstructive sleep
apnea that may occur in the home. It is also indicated for the treatment of respiratory failure
in institutional environments. It is intended to assist the ventilation of spontaneously
breathing patients who are over 30 kg (66 lb) in weight.
The KnightStar 330 is a microprocessor-controlled pressure generator capable of monitoring
the air flow and controlling the pressure delivered to the patient. The following are some of
its operating features:
• Provides three breathing modes, including Continuous Positive Airway Pressure (CPAP),
Inspiratory/Expiratory Positive Airway Pressure (I/E PAP), and Assist Control (A/C).
• Monitors pressure, tidal volume, respiratory rate, air leaks, peak flow, and I:E ratio.

1General information
1-4 Y-102942-00A Rev. G (03/04) KnightStar 330 Service Manual
• Provides precise respiratory support and patient comfort via adjustable inspiratory and
expiratory trigger sensitivity.
• Uses audible and visual indicators to alert users to power failure, system leaks, and other
conditions that could affect device performance.
• Allows a maximum pressure setting of 30 cmH2O, with a pressure limitation of 40 cmH2O
for a single-fault condition.
• Compensates for delivered pressure within specification for altitudes from 0 to 8,000 feet
(2438 meters) at 3 to 30 cmH2O, and compensates for leaks up to 60 liters per minute.
1.6 Configuration information
The KnightStar 330 is available in six configurations—North American and five international
versions. The major differences between ventilators are listed below:
North American: The North American version has Mode and Settings control panel keys and
some displayed information identified in English, and includes English labels, software, and
manuals. The power cord provided fits a standard 115 V AC outlet. Alarm volume may be set
from 0 (off) to 3 (maximum).
All other versions: All versions of the KnightStar 330 other than North American have
control panel keys and displayed information identified using symbols. Labels, software and
manuals are provided in various language configurations. A power cord with the appropriate
plug end is provided according to the configuration ordered. Alarm volume may be set from
0 (off) to 3 (maximum), except for Japanese. The Japanese KnightStar 330 alarm volume may
be set from 1 (minimum) to 3 (maximum) and cannot be set to “off.”
Figure 1-2 on page 1-12 shows the KnightStar 330’s control panel.
1.7 Accessories
The following accessories are either required or can be used with the KnightStar 330. See
Table 1-1 for ordering information.
Calibration Shell: The calibration shell is required for Performance Verification testing on
the KnightStar 330.
Patient circuit: Puritan Bennett recommends using the KnightStar 330 with 1.8 m (6 ft) or
2.4 m (8 ft) tubing and approved interfaces.
Oxygen Adapter: An optional O2adapter may be connected to the KnightStar 330 outlet port
or outlet air filter to enable the use of supplemental oxygen. Refer to the KnightStar 330
Clinician’s Manual for more information.
Humidification device: The KnightStar 330 supports the use of an optional Fisher & Paykel
HC100 Humidifier, or equivalent.
External Battery: The KnightStar 330 may be powered by an external battery. A 32 ampere-
hour or a 7 ampere-hour battery are available. Separate cables are required to connect the
KnightStar 330 to an external battery or to a car or truck cigarette lighter outlet.
Other accessories: A carrying case and rolling stand are also available for the KnightStar 330.

General information 1
KnightStar 330 Service Manual Y-102942-00A Rev. G (03/04) 1-5
Table 1-1 lists the ordering information for KnightStar 330 accessories.
1.8 Specifications
Table 1-2 lists the technical specifications of the KnightStar 330 ventilator.
Table 1-1: KnightStar 330 accessories
Description Part number
Calibration Shell S-231702-00B
KnightStar 330 Patient tube, 6 ft Y-261000-27
KnightStar 330 Patient tube, 8 ft Y-261000-30
Oxygen Adapter Y-616155-03B
Passover humidifier kit (includes 13 in. hose, base,
and reservoir)
Y-102938-00
Battery Kit, 32 Ampere-hour, Domestic (includes
battery, case, 115 VAC charger, charger cable)
Y-CGVPD
Battery Kit, 32 Ampere-hour, European (includes
battery, case, 220 VAC charger, charger cable)
Y-CGVPE
Battery Kit, 7 Ampere-hour (includes battery, case,
universal charger, charger cable)
Y-CGVP7120
Cable, battery adapter Y-102914-00
Cable, cigarette lighter adapter Y-102913-00
Carrying Case, KnightStar 330 Y-213531-01
Rolling Stand, KnightStar 330 902284
Table 1-2: Ventilator specifications
Physical characteristics
Weight 1.21 kg (2.7 lb)
Dimensions 9.52 cm x 20.95 cm x 14.27 cm (3.75 in x 8.25 in x 5.62 in)
Air Outlet Port
Connector
Standard 22-mm conical male
Device Airway
Volume
65 mL
Patient Circuit
Volume
695 mL (1.8 m/6 ft)
927 mL (2.4 m/8 ft)
Environmental specifications
Temperature and
Humidity
Operating: 5 to 40 °C (41 to 104 °F) at 15 to 95% relative humidity, noncondensing
Storage: -40 to 70 °C (-40 to 158 °F) at 10 to 95% relative humidity, noncondensing
Altitude Operating: 0 to 2438 m (0 to 8,000 ft)

1General information
1-6 Y-102942-00A Rev. G (03/04) KnightStar 330 Service Manual
Performance specifications
Working Pressure 3 to 30 cmH2O (1 cmH2O = 0.098 kPa)
Pressure Limit 40 cmH2O
Static Flow Pressure
Regulation
For flow rates up to 60 L/min:
CPAP ± 0.5 cmH2O for settings from 4 to 20 cmH2O
Bi-level ± 1.0 cmH2O for settings from 4 to 30 cmH2O
Noise ≤30 dBA for IPAP/EPAP = 10 cmH2O (measured 1 m in front of device)
Electrical specifications
Rated Mains/AC
Input Voltage
100 – 240 V AC nominal (85 – 264 V AC operating range)
Rated Input
Frequency
50 – 60 Hz
Rated Input Power 140 W
Displayed Patient Parameter Accuracy
Tidal Volume (Vt) ± 20 mL +20% of reading (between 50 mL and 2000 mL)
Peak Flow (V) ± 5 LPM +20% of reading (between 1 and 100 LPM)
Leak (L) ± 5 LPM +20% of reading (between 1 and 100 LPM)
Respiratory Rate ± 1 BPM (between 1 and 50 BPM)
I:E Ratio ± 15% of reading (between 1:1 and 1:9.9)
Pressure ± 1 cmH2O + 10% of reading (3 to 35 cmH2O)
Circuit Resistance
Inspiratory 0.2 cmH2O at 30 L/min
0.9 cmH2O at 60 L/min
Expiratory 4.1 cmH2O at 30 L/min
5.0 cmH2O at 60 L/min
External Battery Specifications
Rated Input Voltage 12 V DC
Rated Input Current 6.0 A
Rated Input Power 140 W
Operating Time 32 Ampere-hour: approximately 8 hours
7 Ampere-hour: approximately 3 hours
NOTE: Actual usage times depend upon patient’s prescription settings.
Table 1-2: Ventilator specifications (continued)

General information 1
KnightStar 330 Service Manual Y-102942-00A Rev. G (03/04) 1-7
Communication Port Specifications
Communication
capabilities
RS-232 (serial) port (Figure 1-1). A 9-pin female connector provides for RS-232 serial
communications, I/E PAP digital triggering, and calibration EEPROM programming. The RS-232
function operates at signal levels of at least 3 V into a standard load at a data rate of 9.6 kbps and
19.2 kbps. Pin 9 is used for calibration EEPROM programming at the manufacturing and service sites,
and during normal bi-level operation, supplies a 0 or 5-volt signal indicating a respective exhalation
or inhalation trigger. Applying 24 ± 1 V to pin 9 enables the write function of the calibration EEPROM
(U3). Any voltage less than 15 V will not enable the EEPROM write function. The calibration EEPROM
contains calibration constants including those for flow and pressure control.
Figure 1-1. KnightStar 330 RS-232 serial port pinout
NOTES:
• The RS-232 connector on devices manufactured prior to the year 2004 is rotated 180o from
the configuration shown above.
• If you would like to use the KnightStar 330 in a special application requiring serial
communications, contact Puritan Bennett Technical Support at 1.800.255.6774 or your
local Puritan Bennett representative.
Table 1-2: Ventilator specifications (continued)
12345
89 67
Pin Signal
1 Not connected
2 Transmit data (TxD) to PC
3 Receive data (RxD) from PC
4 Not connected
5Ground(GND)
6 Not connected
7 Not connected
8 Not connected
9 Dual use I/E PAP trigger-out and program-
enable input

1General information
1-8 Y-102942-00A Rev. G (03/04) KnightStar 330 Service Manual
1.9 Compliance and approvals
The KnightStar 330 was developed in accordance with pertinent FDA guidances and North
American and ISO international standards (Table 1-3). The manufacturing facility for this
product is ISO 13485 certified.
The ventilator’s IEC 60601-1/EN 60601-1 classification is Protection class II, Type BF,
externally powered, IPX1 drip-proof equipment.
Table 1-3: Compliance with standards
Standard Type Standard Number Description
Quality system EN ISO 13485:2000 Quality Systems – Medical Devices –
Particular Requirements for the application
of EN ISO 9001:1994
FDA Guidance
FDA Ventilator Guidance FDA Reviewer Guidance for Ventilators,
Draft (July 1995)
FDA Medical Electrical
Safety Guidance
FDA Reviewer Guidance for Pre-market
Notification Submissions, November 1993
draft, Anesthesiology and Respiratory
Devices Branch
Safety, USA UL 2601-1 Medical Electrical Equipment, General
Requirements for Safety, (2nd Edition)
Safety, Canada CAN/CSA C22.2 No.
601.1- M90
Safety of Medical Electrical Equipment,
General Requirements (Supplement
1:1994), (A2:1998)
Safety, Europe &
International
EN 60601-1 (compliant
with all applicable
collateral standards and
particular requirements)
Medical Electrical Equipment, Part 1:
General Requirements for Safety, 1st
Edition, 1988. (A1:1993), (A2:1995)
EN 60601-1-1 Collateral Standard: Safety Requirements
for Medical Electrical Systems, 2nd Edition,
2001
EN 60601-1-2 (compliant
with all applicable tests)
Medical Electrical Equipment, Collateral
Standard: EMC – Requirements and Test,
2nd Edition, 2001
JIST-1001-1 Safety Requirements for Medical Electrical
Equipment in Japan
CISPR 11 EMC Disturbance Characteristics – Limits
and Methods of Measurement, Industrial
Scientific and Medical (ISM) RF Equipment,
Edition 3.1, 1999-08
EN 475 Electrically generated alarm signals
This device complies with the requirements of Medical Device Directive 93/42/EEC concerning medical
devices.

General information 1
KnightStar 330 Service Manual Y-102942-00A Rev. G (03/04) 1-9
1.10 Breathing modes and settings
The KnightStar 330 offers three breathing modes: CPAP, I/E PAP, and A/C. Each breathing
mode enables a different set of system settings. Table 1-4 lists the modes and the adjustable
settings within each mode. Table 1-5 describes each setting, its adjustable range, and how the
setting can be accessed.
Table 1-4: Adjustable settings in each breathing mode
CPAP I/E PAP A/C
CPAP IPAP IPAP
Alarm volume EPAP EPAP
Leak alarm Inspiratory sensitivity Respiratory rate and backup
respiratory setting (f)
Delay time Expiratory sensitivity I:E ratio
Ramp duration Rise time Inspiratory sensitivity
Ramp start pressure Alarm volume Expiratory sensitivity
Mask leak Leak alarm Rise time
Low pressure alarm Alarm volume
High pressure alarm Leak alarm
Delay time Low pressure alarm
Ramp duration High pressure alarm
Ramp start pressure Delay time
Mask leak Ramp duration
Ramp start pressure
Mask leak
Table 1-5: KnightStar 330 settings, ranges, and accessibility
Setting Description Range Accessibility
CPAP Level of CPAP pressure 3–20 cmH2O (increments of
1 cmH2O)
Top panel, RS-232
IPAP Pressure during inspiration 3–30 cmH2O (increments of
1 cmH2O)
Top panel, RS-232
EPAP Pressure during expiration 3–20 cmH2O (increments of
1 cmH2O)
Top panel, RS-232
Backup
respiratory rate
Rate of machine-initiated
breaths
3–30 bpm (increments of 1
bpm)
Top panel, RS-232
I:E ratio Ratio of inhalation time to
exhalation times for backup
breath rate
1:1.0 to 1:4.0 (increments
0.5)
Top panel, RS-232
Inspiratory
sensitivity
Sensitivity at which devices
switches from EPAP to IPAP
1–5 (1 most sensitive; 5 least
sensitive)
Top panel, RS-232

1General information
1-10 Y-102942-00A Rev. G (03/04) KnightStar 330 Service Manual
NOTE: For information on using the RS-232 port, contact Puritan Bennett Technical
Support at 1.800.255.6774 or your local Puritan Bennett representative.
Expiratory
sensitivity
Sensitivity at which devices
switches from IPAP to EPAP
1–5 (1 most sensitive; 5 least
sensitive)
Top panel, RS-232
Rise-time Rate of pressure increase 1–5 (1 is the fastest setting; 5
is the slowest)
Top panel, RS-232
Alarm volume Sets the loudness of the
alarm.
NOTE:
The alarm volume
cannot be turned off
on Japanese versions of
the KnightStar 330.
0–3 (0=Off, 3=loudest)
Japanese configuration only:
1–3 (1=lowest volume,
3=highest volume)
Top panel, RS-232
Leak alarm Rate of air leaking at which
alarm sounds
50–100 liters per minute
(increments of 10 L/min);
0=Off
Top panel, RS-232
Low pressure
alarm
Pressure below the prescribed
IPAP setting at which an
alarm will sound
1 cmH2O below the IPAP
setting to 1 cmH2O above
EPAP (in increments of 1
cmH2O); 0 = Off.
Top panel, RS-232
High pressure
alarm
Pressure above the prescribed
IPAP setting at which an
alarm will sound
1 cmH2O above the IPAP
setting to 35 cmH2O (in
increments of 1 cmH2O); 0 =
Off.
Top panel, RS-232
Delay time Time delay before device
automatically starts
0–30 minutes (in increments
of 5 minutes)
Top panel, RS-232
Ramp duration Time from device start to
prescribed operating pressure
0–30 minutes (increments of
5 minutes)
Top panel, RS-232
Ramp start
Pressure
Pressure at which the device
starts ramp sequence
3–20 cmH2O (increments of
1 cmH2O)
Top panel, RS-232
Interface
(Mask) leak/
type
Patient interface purge hole
leak rate
1–6 (1 is the lowest leak
value, and 6 is the highest)
Top panel, RS-232
Patient ID Unique patient identifier 12 digits RS-232
Internal Clock Clock used by device 24-hour clock RS-232
Table 1-5: KnightStar 330 settings, ranges, and accessibility (continued)
Setting Description Range Accessibility

General information 1
KnightStar 330 Service Manual Y-102942-00A Rev. G (03/04) 1-11
1.11 Initial factory settings
The KnightStar 330’s initial factory settings are listed in Table 1-6.
Table 1-6: Initial factory settings
Setting Value
MODE A/C
IPAP 5 cm H2O (same setting for CPAP)
EPAP 3 cm H2O
Respiratory rate 10
I:E ratio 1:2.0
I Sensitivity 3
E Sensitivity 3
Rise time 3
Alarm volume 3
Leak alarm 100 L/min
Low pressure alarm 4 cmH2O
High pressure alarm 6 cmH2O
Delay time 0
Ramp duration 0
Ramp start pressure 3 cm H2O
Mask leak 2
Over-pressure alarm 40 cmH2O (not adjustable)

1General information
1-12 Y-102942-00A Rev. G (03/04) KnightStar 330 Service Manual
1.12 Controls, indicators, and symbols
Refer to Figure 1-2 through Figure 1-4 and Table 1-7 through Table 1-10 for ventilator
controls, indicators, and symbols.
Figure 1-2. KnightStar 330 Control Panel (International version shown above, North
American version shown below)
Bi-Level
â
Ventilator
1
2
3
P URITAN B ENNETT
TM
1
12
14
13
2
3
4
5
6
7
89
10
P URITAN B ENNETT
TM
Mode Set
Delay
Ramp Alarm
Silence
Bi-Level
â
Ventilator

General information 1
KnightStar 330 Service Manual Y-102942-00A Rev. G (03/04) 1-13
Table 1-7: KnightStar 330 control panel keys and indicators
Index
(Figure 1-2
on page 1-
12)
Labeling Function
1 Lockout Mode Indicator.
Indicates the KnightStar 330 control panel is locked. In Lockout
mode, the patient can change only the delay time, ramp duration,
and start pressure settings.
Indicates the KnightStar 330 control panel is unlocked. When
Lockout mode is inactive, the clinician may change any ventilator
settings.
NOTE:
To change the Lockout state, press and hold the Mode and Up Arrow
keys simultaneously for approximately 2 seconds.
2
International
or
Mode key.
Pressing the Mode key repeatedly allows you to scroll through CPAP, I/E, and
A/C modes. Press the Mode key to leave Settings mode when finished
adjusting settings.
The Mode key does not function when the KnightStar 330 control panel is
locked.
North American
3
International version
or
Settings key.
Press the Settings key repeatedly to scroll through available parameters for
each breathing mode. When the KnightStar 330 control panel is locked, the
Settings key can only be used to change the delay time, ramp duration, and
ramp start pressure.
North American version
1
2
3
Mode
Set

1General information
1-14 Y-102942-00A Rev. G (03/04) KnightStar 330 Service Manual
4
International version
or
Down Arrow & Delay/Ramp key.
Use the Down Arrow key to decrease a selected setting value in Settings
mode. If not in Settings mode, use this key to start or stop the Delay/Ramp
function.
North American version
5
International version
or
Up Arrow & Alarm Silence key.
Use the Up Arrow key to increase a selected setting value in Settings mode. If
not in Settings mode, use this key to mute an active alarm for one minute.
NOTE:
In A/C or I/E mode, when the main display screen is shown, pressing
this key displays Vand I:E ratio if there are no active alarms.
North American version
6 On/Off key. Turn the KnightStar 330 system on with a quick press and release
action. To turn the device off, press and hold the On/Off key for 3 seconds.
The KnightStar 330 retains in memory the prescription settings last entered.
7 Green LED When illuminated, indicates the presence of power, whether from Mains/AC
or external battery (Stand-by mode).
Table 1-7: KnightStar 330 control panel keys and indicators (continued)
Index
(Figure 1-2
on page 1-
12)
Labeling Function
Delay
Ramp
Alarm
Silence

General information 1
KnightStar 330 Service Manual Y-102942-00A Rev. G (03/04) 1-15
8 Yellow LED When steadily illuminated and accompanied by the symbol displayed in
the lower left corner of the LCD panel, indicates a LOW PRIORITY alarm
condition.
When steadily illuminated, with no symbol displayed on the LCD panel,
indicates a full compliance log (see Table 4-4 on page 4-11).
When flashing, indicates a MEDIUM PRIORITY alarm condition accompanied
by an audible alarm signal (3 beeps at intervals of approximately 25
seconds).
Refer to Section 4 for causes and corrections for alarm conditions.
9 Red LED When flashing, indicates a HIGH PRIORITY alarm condition accompanied by
an audible alarm signal (a series of 3 beeps, then 5 beeps, then 2 beeps at
intervals of approximately 6 seconds). Refer to Table 4 for causes and
corrections for alarm conditions.
10 Liquid Crystal Display
(LCD)
The LCD provides an easy-to-read format for mode, settings, and patient
data. A backlight illuminates the display when the Mode, Settings, or Up
arrow key is pressed. The display will remain illuminated for approximately
60 seconds after the last key is pressed.
Table 1-7: KnightStar 330 control panel keys and indicators (continued)
Index
(Figure 1-2
on page 1-
12)
Labeling Function
f

1General information
1-16 Y-102942-00A Rev. G (03/04) KnightStar 330 Service Manual
Figure 1-3. KnightStar 330 rear view
back.eps
1
23
2
1
3
Table 1-8: KnightStar 330 rear view
Index
(Figure 1-3
on page 1-
16)
Labeling Function
1 Mains/AC power electrical input connector. The KnightStar 330 operates on
100V to 240 V AC at 50 or 60 Hz.