Philips Respironics Ventilator User manual

BiPAP® Focus™ Ventilator

SERVICE MANUAL

REF 1029568 Rev A

Copyright © 2006. Respironics, Inc.
ALL RIGHTS RESERVED.

This work is protected under Title 17 of the United States copyright code and is the sole property of Respironics.
No part of this document may be copied or otherwise reproduced, or stored in any electronic information
retrieval system, except as specifically permitted under United States copyright law, without the prior written
consent of Respironics.

In the U.S. and Canada

Respironics California, Inc.
2271 Cosmos Court
Carlsbad, CA 92011
USA
1-800-345-6443

For Technical support, contact:

Respironics, Inc. Customer Service
Within the U.S.A. 1-800-345-6443
Outside the U.S.A. 724-387-4000
Facsimile 724-387-5012
[e-mail]

II BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Table of Contents

1. Introduction and Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Recommended Tools and Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Where to Go for Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2. Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

3. Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Settings: CPAP Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Settings: S/T Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Measured Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Alarm Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Nurse Call Station/Serial Communications Connector Pinout . . . . . . . . . . . . 3-10

Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Triggers and Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Bacteria Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Date of Manufacture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Pneumatics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

4. Periodic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Storing the BiPAP Focus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Cleaning the Reusable Air Inlet Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Replacing the Air Inlet Filter(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Replacing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

5. Diagnostic Mode and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 5-1

Entering Diagnostic Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Product Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Preferences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Significant Event Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Setting Up the Serial Interface for DRPT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. III

Table of Contents

6. Ventilator Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

7. Performance Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Generating a Diagnostic Report (DRPT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Sensor Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

System Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Significant Event Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

Download Service Software to the Service PC . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Installing Communications Software on the Service PC . . . . . . . . . . . . . . . . . . . . 6-2

Starting the BiPAP Focus Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Downloading Controller Board Software to the Ventilator . . . . . . . . . . . . . . . . . . . 6-4

Downloading UI Software to the Ventilator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Reprogramming the BiPAP Focus Serial Number . . . . . . . . . . . . . . . . . . . . . . . 6-13

Required Test Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Preliminary Cleaning, Inspection, and Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Electrical Safety Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Alarm/LED Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

BiPAP Focus System Run-in. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Real-time Clock Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

If Real-Time Clock Calibration Fails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

MFTS Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

Multi Function Test Station Set-up (MFTS) . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

MFTS software setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

Unit Under Test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

Field Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17

Recording Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18

Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28

Performance Verification Data Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29

8. Component Removal/Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Disconnecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

Top Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

VGA Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6

User Interface Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

Controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11

Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13

Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14

IV BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Table of Contents

Secondary Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15

Primary Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16

Main Body Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16

Interconnect Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17

9. BiPAP Focus Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . 9-1

Complete Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

Exterior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

Exterior

(continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

Front Panel/User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

Ventilator Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

Communications Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

Electronic Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. V

Table of Contents

VI BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 1. Introduction and Intended Use

The BiPAP Focus Non-invasive Ventilator is a microprocessor-controlled,
electrically powered mechanical ventilator. The BiPAP® Focus™ Ventilator
System provides noninvasive ventilation for adult (over 30 kg or 66 lbs.)
patients for the treatment of respiratory insufficiency and distress, and
obstructive sleep apnea. The BiPAP Focus is appropriate for acute, sub-acute,
and intra-hospital transport settings.

The BiPAP Focus System is intended for use with nasal and full face masks.
The BiPAP Focus is not intended to be a life-support device.

The BiPAP Focus Ventilator meets or exceeds all applicable safety
requirements, consensus guidelines, US regulatory statutes, and international
regulatory standards for life support/mechanical ventilation devices.

Read this manual thoroughly prior to performing service or maintenance on the
BiPAP Focus Ventilator. This manual contains advanced troubleshooting,
calibration, and maintenance instructions for the BiPAP Focus. All
maintenance and repair work should be performed by qualified biomedical
technicians who have received appropriate training and authorization to
provide maintenance, repair, and service for the BiPAP Focus.

Review the operating instructions for the BiPAP Focus Ventilator before
running tests, checking operational readiness, or initiating patient use. These
instructions include important information about ventilator safety and
operation.

For additional information about accessories or related equipment, such as
humidifiers and remote alarm systems, refer to the appropriate instruction
manual prior to operating with the BiPAP Focus Ventilator.

The BiPAP Focus Operator’s Manual for the BiPAP Focus Ventilator lists all
applicable warnings and cautions. Review these notices thoroughly before
operating the ventilator.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 1-1

Chapter 1

Introduction and Intended Use

Recommended Tools

and Test Equipment

Table 1-1 lists the recommended tools, test equipment, and materials required
to service and maintain the BiPAP Focus Ventilator.

Description Manufacturer and Model

Test Equipment

Digital multimeter (DMM) accurate to three decimal
places

Electrical safety analyzer Dale LT 5440 or equivalent

Pneumatic calibration analyzer capable of measuring
low pressure (cmH
(liters)

O), flow rate (LPM), and volume

2

Ventilator Accessories

Connector, plastic, 22mm OD Respironics P/N 1006242 or equivalent

Connector, 22-mm (quantity 2) Respironics P/N or equivalent

Flow Control Valve Respironics P/N 1006120

Pressure test adapter Respironics P/N 312710

Tee, plastic with silicone rubber coupling Respironics P/N C06260 or equivalent

Tee silicone (quantity 2) Respironics P/N 1006243 or equivalent

Hand Tools and Materials

Pliers Local supplier

#1 Phillips head screwdriver Local supplier

#2 flat head screwdriver Local supplier

#2 Phillips head screwdriver Local supplier

Cleaning Cloth Local supplier

Isopropyl Alcohol Local supplier

Metric hex key set (rounded ends), 1.5 to 4 mm Local supplier

Mild detergent or antiseptic wipes Local supplier

Needle nose pliers Local supplier

BiPAP Focus Communications Cable Kit
(USB & DB9)

PC or laptop (required for downloading software) Required: Windows XP operating

Pen size flat head screwdriver Local supplier

Pen size Phillips head screwdriver Local supplier

Test lung, hard sided Respironics P/N 1021671 or local

Torque driver capable of 1 to 25 in.-lbs (N-m) Local supplier

Local Supplier

Respironics P/N 1012598 or equivalent

Respironics P/N 1030010

systems, serial comm port, and USB
port

supplier

Table 1-1: Recommended Test Equipment, Tools, and Materials

1-2 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Introduction and Intended Use

Where to Go for Help For Customer Service and Product Support contact:

Respironics, Inc.
USA telephone: [phone]
USA: 1-800-886-0245
International telephone: [phone]
International fax: [phone]
[e-mail].
[e-mail].
www.respironics.com.

Chapter 1

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 1-3

Chapter 1

Introduction and Intended Use

(This page is intentionally blank.)

1-4 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 2. Warnings and Cautions

Warnings, Cautions, and Notes are used throughout this manual to
identify possible safety hazards, conditions that may result in
equipment or property damage, and important information that must be
considered when performing service and testing procedures on the
BiPAP Focus.

WARNING: A condition that could cause injury to a patient, operator or technician if

the operating instructions in this manual are not followed correctly.

CAUTION: A condition that could cause damage to, or shorten the service life of,

the device.

NOTE: Important information concerning the construction or operation of the

device.

Warnings • To assure the safety of the service technician and the specified

performance of the device, Respironics recommends that only
technicians having prior training or experience servicing
ventilatory devices perform any repairs or adjustment to the BiPAP
Focus.

• Use only Respironics repair/service parts. Use of non-Respironics
parts may alter ventilator reliability resulting in damage. Use of
non-Respironics repair parts will affect the ventilator warranty.
Contact Customer Service at 1-800-345-6443 or 724-387-4000
for more information.

• High voltages are present in the AC/DC Power Supply, Power Cord
and VGA PCB. To avoid electrical shock, disconnect the power
cord before attempting any repairs on the device or cleaning.

• DO NOT immerse this device into any fluids or allow any liquid to
enter the cabinet or the filter intake.

• To avoid personal injury, always disconnect external AC and DC
power sources from the ventilator before servicing or cleaning.

• To avoid personal injury or the possibility of damage to the
ventilator, regularly inspect the power cord to ensure it is free from
defects and any obvious wear and is properly grounded.

• This device is not for life support.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 2-1

Chapter 2

Warnings and Cautions

• Never troubleshoot while a patient is connected to the ventilator,
since normal operation is suspended.

• If the ventilator has been operating, the internal parts may be hot.
Use caution when accessing.

• To prevent disease transmission, use protective equipment when
handling contaminated bacteria filters or other patient
accessories. Follow manufacturers' labeling and institutional
guidelines for disposal of contaminated accessories.

• To avoid cross-contamination between the test equipment and
ventilator, always install a bacteria filter between the main outlet
and test device.

• Explosion hazard. Do not operate the ventilator in the presence of
flammable anesthetic agents.

• To avoid the risk of fire, use only Respironics-approved batteries.
All battery connections are keyed to ensure proper connection. Do
not attempt to connect a battery incorrectly. Only qualified
technicians should install the battery.

• Use only Respironics-supplied cables with the nurse call station/
serial communications connector.

• To avoid personal injury or the possibility of damage to the
ventilator, DO NOT operate this device if it has failed any of its
diagnostic tests, either self or service initiated.

Cautions • Federal law (US) restricts this device to sale by, or on the order of,

a physician.

• Failure to replace a dirty filter may cause the device to operate at
higher than normal temperatures and damage the device.

• Use only Respironics-approved filters.

• Use only Respironics-approved batteries.

• The gray reusable air inlet filter must be completely dry before
use. Never place a wet filter into the device.

• Do not place more than one gray reusable air inlet filters that
come with the ventilator into the device at the same time. One
gray reusable air inlet filter and one white disposable ultra-fine
filter may be used.

• Replace any filter that is damaged.

• Do not attempt to clean or reuse disposable air inlet filters.

• Electronic components used in this device are subject to damage
from static electricity. Repairs made to this device must be
performed only in an antistatic, Electro-static Discharge (ESD)­protected environment.

2-2 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 2

Warnings and Cautions

• Care should be taken to avoid exposure of the BiPAP Focus to

temperatures at or near the extremes of those specified in Chapter

3. If exposure to such temperatures has occurred, the device
should be allowed to return to room temperature before being
turned on.

• Never place liquids on or near the BiPAP Focus.

• The information in this manual is provided for service personnel

reference.

• Always ensure that you are following proper electrostatic discharge

(ESD) grounding procedures before handling static-sensitive
devices.

• Be careful not to pull or crimp any cables, tubes or wires.

• Troubleshooting and repair should be performed only by a

qualified service technician.

Notes • Refer to the BiPAP Focus Operator’s Manual for product use,

additional Warnings, Cautions and Notes.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 2-3

Chapter 2

Warnings and Cautions

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2-4 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 3. Theory of Operation

The BiPAP® Focus™ Ventilator System provides noninvasive breathing
support for adult patients weighing 30 kg (66 lbs.) or greater.

The BiPAP Focus System offers two ventilation modes:

• Continuous positive airway pressure (CPAP), which provides a single
level of positive pressure to the patient.

• Spontaneous/Timed (S/T), which provides two levels of positive
pressure (one during inspiration and one during exhalation), and
delivers timed breaths if the patient does not initiate a breath.

The BiPAP Focus System alarms annunciate when high or low pressure
regulation, apnea, patient disconnect, low power, or loss of mains power
conditions occur. The system displays a real-time estimated delivered pressure
bar graph.

An Apnea Rate (#Apnea) Alarm is provided to alert the caregiver to repeated
periods of short apneas of 10 seconds or more. The caregiver can set the value
for how many apnea periods (10 seconds or more) can occur within an hour
before alarming. The total number of Apnea periods (10 seconds or more) for
the previous hour is displayed as part of the patient data. Because the previous
hours data is displayed, the number of apnea periods for the first hour is an
estimate only.

The BiPAP Focus System includes alarm silence and alarm pre-silence
features. Battery backup provides a minimum of 45 minutes of backup power
at default settings in case AC power is not available (for example, during
transport within the hospital).

The BiPAP Focus System features Digital Auto-Trak™, which allows it to
recognize and compensate for unintentional leaks and promote synchrony by
adjusting its trigger and cycle algorithms to maintain optimum performance.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 3-1

Chapter 3

Theory of Operation

Air Delivery System Components

Air Inlet Filter(s) The air inlet filter removes coarse particulate from

Blower The blower draws room air though the air inlet filter and

ambient air as it is entrained into the blower assembly.
See Section 4 for periodic maintenance information.
The BiPAP Focus has a reusable dust filter that is gray in
color. An optional pollen filter, white in color is also
available.

muffler, and outputs air for delivery to the patient. The
DC impeller-type blower recirculates air through the flow
valve when not delivering gas to the patient. Compressor
speed is determined by patient settings. The controller
PCB controls compressor speed.

Table 3-1: Air Delivery System Components

3-2 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 3

Theory of Operation

Air Delivery System Components (Continued)

Flow valve (FV) The flow valve (valve assembly) is a mechanical sliding

assembly driven by an electromagnetic coil. Valve
commands from the PCB control current (-125mA to
675mA) to the coil. Movement of the flow valve is
proportional to the current through the coil. The flow
valve operates as a closed-loop system, using feedback
from the flow sensor and pressure transducers.

Air Flow Sensor The air flow sensor measures flow from the flow valve.

The ventilator uses this measurement to provide closed
loop control of the flow valve and to compute the flow
and volume delivered to the patient.

Table 3-1: Air Delivery System Components

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 3-3

Chapter 3

Theory of Operation

Electronic System Components

User Interface PCB • Motorola 68332 microcontroller

• Inter-processor communication with controller PCB

• VGA Display, Keyboard and front panel LED Interface

• Primary alarm driver

• Remote alarm relay

• USB and RS-232 serial communication

• Internal Battery charging and monitoring

• Temperature monitor

• Microcontroller watchdog and reset logic

• Voltage monitoring

Controller PCB • Blower On / Off / Closed-Loop Speed Control

• Air Flow Valve Controller

• Pressure Measurement

• RS-232 Communication

• Inter-processor communication with interface PCB

• Backup alarm driver

VGA PCB • STN Blue Mode Transmissive Viewing

• One-Quarter VGA (320 x 240)

• Dot Pitch 0.36mm x 0.36mm

Table 3-2: Electronic System Components

3-4 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Theory of Operation

Electronic System Components (Continued)

External AC/DC Power Supply • 90-240 VAC, 40-60Hz Input

• 120 Watt 18 Volt DC Output

Chapter 3

Internal NiMH (Nickel Metal Hydride)
Battery

Table 3-2: Electronic System Components

• 8 cell 3.8 Amp Hour provides 9.6 Volt output
nominal

• In-line thermal fuse

• Built-in thermistor for temperature monitoring

• Nominal charge time under 5 hours

• Nominal run time 45 minutes

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 3-5

Chapter 3

Theory of Operation

Back Panel The back panel has three connection points and the On/Off switch.

• Nurse call station / serial communications port

•USB port

• AC/DC Power supply input & power cord relief clip

•ON/OFF switch

USB
port

AC/DC power
supply input

ON/OFF switch

Shown in the
OFF position

Nurse call station/serial
communications port

Specifications Default Settings

S/T mode RR = 4/min

IPAP = 12 cmH

EPAP = 4 cmH

Rise-Time = 2 Ramp Start = 4 cmH

Settings: CPAP Mode

CPAP

Continuous Positive Airway
Pressure

Power cord relief clip

Figure 3-1: Back Panel

O I-Time = 1 sec

2

O Ramp Time = 0 min

2

Range: 4-20 cmH

Resolution: 1 cmH

Dynamic accuracy: ±5 cmH

O (4-20 hPa)

2

O (1 hPa)

2

O

2

O (5 hPa)

2

Ramp Time

Period over which the ventilator
increases inspiratory pressure
from Ramp Start setting to
CPAP setting.

Range: 0-45 min.

Resolution: 5 min.

Accuracy: ±10% of setting

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Chapter 3

Theory of Operation

Ramp Start

Initial inspiratory pressure

Settings: S/T Mode

IPAP

Inspiratory positive airway
pressure, the inspiration
pressure setting

EPAP

Expiratory positive airway
pressure, the exhalation
pressure setting

Rise-Time

How quickly the ventilator
increases inspiratory pressure
from EPAP pressure to 67% of
pressure support level

Range: 4 cmH2O to CPAP setting (4 hPa to
CPAP setting)

Resolution: 1 cmH2O (1 hPa)

Range: 4-30 cmH

Resolution: 1 cmH

O (4-30 hPa)

2

O (1 hPa)

2

Dynamic accuracy: ±5 cmH2O (5 hPa)

IPAP cannot be set below EPAP.

Range: 4-25 cmH

O (4-25 hPa)

2

Resolution: 1 cmH2O (1 hPa)

Dynamic accuracy: ±5 cmH

O (5 hPa)

2

Range: 1-6 (where 1 = 0.1 sec and 6 = 0.6 sec)

Resolution: 1

Accuracy: ± (0.15 + 10% of setting) sec

Rate

Respiratory rate, used to
determine if a timed breath is
delivered

Range: 1-30/min

Resolution: 1/min

Accuracy: ±1/min or ±10% of setting, whichever
is greater over a 4-minute period.

I-Time and Rate settings cannot allow I-Time to
exceed expiratory time.

I-Time

Inspiratory time

Range: 0.5-3 sec

Resolution: 0.1 sec

Accuracy: ± (0.1 + 10% of setting) sec

I-Time and Rate settings cannot allow I-Time to
exceed expiratory time.

Ramp Time Range: 0-45 min

Resolution: 5 min

Accuracy: ±10% of setting

Ramp Start

Initial inspiratory pressure

Range: 4 cmH

2

Resolution: 1 cmH

O to EPAP (4 hPa to EPAP)

O (1 hPa)

2

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 3-7

Chapter 3

Theory of Operation

Measured Data

Patient circuit pressure bar
graph (continuous display)

Rate

Measured respiratory rate

Est. Vt

Estimated delivered tidal
volume

Est. MV

Estimated exhaled minute
volume

Range: 0-35 cmH2O (0-35 hPa)

Resolution: 1 cmH

Accuracy: ±10% of scale

In the event of total loss of power, the inspiratory
and expiratory pressure measured at the patient
exhalation port at 60 L/min is less than 1 cmH2O

by virtue of mask and ventilator design.

Range: 0-60/min

Resolution: 1/min

Accuracy: ± (1 + 10% reading)

Range: 0-4000 mL

Resolution: 1 mL

Accuracy (S/T Mode): ± (50 mL + 10% reading)
(when leak <60 L/min, using the Vision circuit)

Accuracy (CPAP Mode): ± (100 mL + 10%
reading) (when leak <60 L/min, using the Vision
circuit)

Vt display flashes when peak inspiratory flow for
successive breaths varies by more than 15 L/
min.

Range: 0-99 L/min

Resolution: 0.1 L/min

Accuracy: ± 1 L or ± 10% actual, whichever is
greater (when leak is <60 L/min using the Vision
circuit).

O (1hPa)

2

Leak

Estimated Patient leak

#Apnea

Brief apnea periods

Trigger

Breath trigger

NOTE: Est. Vt and Est. MV estimates are at ambient temperature and pressure, dry
(ATPD). Pressure signals are filtered using a 50-Hz low pass Butterworth filter.

Range: 0-150 L/min

Resolution: 1 L/min

Accuracy: ± (15 L/min +10%)

Range: 0-99/hour

Resolution: 1/hour

Accuracy: ± 1/hour (after 1 hour)

Range: Patient or Timed (ventilator)

3-8 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Alarm Settings

Chapter 3

Theory of Operation

Apnea

The length of time without a
spontaneous breath that triggers the
Apnea alarm

#Apnea

The number of periods (10-seconds or
more) in the previous hour where the
patient has not initiated a
spontaneous breath.

NOTE: For the first hour, this value is
an estimate only.

Options

Display Units

Unit of pressure: centimeters of water
(cmH

O), hectoPascals (hPa), or

2

millibars (mbar).

Alarm Volume

Audible alarm volume

Range: 20, 40, 60 sec or OFF

Default setting: 20 sec

Range: 5, 10, 20, or OFF

Default setting: OFF

Range: cmH

Range: OFF, or minimum volume, to
maximum volume, in 5 discrete
settings.

O, hPa, or mbar

2

Contrast

Screen contrast

Brightness

Screen brightness

Reverse Video

Toggles reverse video

Screen Lock Timer Range: ON or OFF

Range: 20% to 100%

Range: 10% to 100%

Range: ON or OFF

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 3-9

Chapter 3

Theory of Operation

Nurse Call Station/Serial Communications Connector Pinout

Pin Signal

Nurse Call Station

1 Nurse call station common

6 Normally open (NO) during normal (non-alarm) operation

9 Normally closed (NC) during normal (non-alarm) operation

Serial Communications

2 Respironics advanced serial protocol (RASP) RS-232 Transmit (Tx)

3 RASP RS-232 Receive (Rx)

4 Not used

5 RS-232 signal ground

7 RS-232 Tx (reserved for future use)

8 RS-232 Rx (reserved for future use)

NOTE:

• When pins 1 and 6 are used, the relay is open during normal operation,
and closed during an alarm condition including loss of power.

• When pins 1 and 9 are used, the relay is closed during normal operation,
and open during an alarm condition including loss of power.

• Female DB9 connector pin configuration:

WARNING: Use only Respironics-supplied cables with the nurse call station/serial

communications connector.

Physical

BiPAP Focus
System Dimensions

355-mm H x 290-mm W x 140-mm D (14.0-in. H x 11.4-in.
W x 5.5-in. D)

Excluding accessories, gas inlets, patient connections.

Weight 4.5 kg (10 lbs.)

3-10 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 3

Theory of Operation

Power

Input range 90-264 V~, 47-63 Hz, 90 VA

Battery backup 3.8 amp-hour (Ah) nickel metal hydride (NiMH) battery

provides 45 minutes of operation at default settings.
System automatically activates the battery charge cycle
when connected to AC power and the ON/OFF switch is
ON ( | ) (during normal operation or Standby mode).

Recharge time is typically under 5 hours, but may extend
further depending on machine settings if operating on
battery prior to recharge, or if operating in elevated
ambient temperature (above 28°C). Charge is complete
when the green CHARGING LED extinguishes.

Nurse call station relay Rated current: 0.280 A

Rated voltage: 250V

Fuse type No replaceable fuses.

Power cord Refer to the“Complete Parts List” on page 9-1

Triggers and Cycles

Volume-based trigger

Flow reversal cycle

Shape signal

Timed trigger

IPAP maximum of 3.0 seconds

Peak flow cycle

Supplemental Oxygen

Flow and pressure into
oxygen valve

Maximum flow: 15 L/min at ambient pressure

Environmental

Temperature Operating: +5 to +35°C at 10 to 95% relative

humidity

Storage: -20 to 60°C at 95% relative humidity

Atmospheric pressure Operating: 83 to 102 kPa (830 to 1020 mBar)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 3-11

Chapter 3

Theory of Operation

Storage When the BiPAP Focus is not in use for periods

of 2 weeks or longer, it is recommended that the
unit be stored in a clean, sanitized plastic bag.

Bacteria Filter

Dead space 68 mL

Bacteria/viral filter
efficiency

Resistance 0.7 cmH

Connectors Male connector 15-mm I.D./22-mm O.D.

>99.99%
P/N 342077

O/L/s at 0.5 L/s

2

Female connector 22-mm I.D.

Date of Manufacture

The 12-digit serial number located on the base of the unit indicates the date of
manufacture. From left to right, the fifth and sixth digits indicate the year; the
seventh and eighth, the month; the ninth and tenth, the day. For example, the
serial number 0001050903-20 indicates that the device was manufactured 3
September, 2005.

3-12 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Pneumatics BiPAP Focus System pneumatic diagram:

Chapter 3

Theory of Operation

Air inlet
port

BiPAP Focus System

Air inlet
filter

Muffler

Blower

(motor)

Pressure sensor

Flow sensor

Control
valve

Tubing (elbow)

Diffuser

Bacteria filter
(mandatory)

Patient circuit
(to mask outlet)

Oxygen adapter
(if using oxygen)

Oxygen valve
(if using oxygen)

Outlet port and
pressure sensor

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 3-13

Chapter 3

Theory of Operation

(This page is intentionally blank.)

3-14 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 4. Periodic Maintenance

This chapter provides guidelines and illustrates the cleaning and maintenance
procedures for the BiPAP Focus system.

Table summarizes maintenance procedures for the BiPAP Focus System.

To ensure correct operation, perform all maintenance at the recommended
intervals.

BiPAP Focus System Maintenance

Part Interval Procedure

Battery Replace the battery if a

Batt. Charge Failure alarm
occurs, or as indicated in
See “Replacing the
Battery” on page 4-3.

Air inlet filter(s) Reusable: clean monthly

or as needed.

Reusable: every year or as
needed.

Disposable: replace as
needed.

The air path cannot be
cleaned.

System exterior As needed. Clean the exterior of the ventilator with

Qualified service technician only.

NOTE: If the unit has been in
storage or has not been used for 3
months, the battery will require a
full charge.

Follow the “Cleaning the Reusable Air
Inlet Filter” on page 4-2.

Replace.

Do not attempt to clean or reuse
disposable filters.

a soft damp cloth moistened with any
of the following solutions:

• Mild detergent or soapy water

• 10% bleach solution (90% water)

• Isopropyl alcohol (91%)

• Quaternary ammonium germicides
(sprays or disposable cloths)

Do not spray or immerse in liquid. Do
not allow liquid to penetrate the
system.

Flow Valve
Assembly

10,000 hours
(Total operating hours
Refer to Figure 5-3 on
page 5-3.)

Replace Flow Valve Assembly

Table 4-1: BiPAP Focus System Maintenance

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 4-1

Chapter 4

Periodic Maintenance

Storing the BiPAP

Focus

Cleaning the

Reusable Air Inlet

Filter

When the BiPAP Focus is not in use for periods of 2 weeks or longer, it is
recommended that the unit be stored in a clean, sanitized plastic bag.

While the unit is being stored, ensure that the power switch on the back of the
unit is in the OFF (O) position. If the switch is not turned OFF, the internal
battery will be depleted within two weeks. If the unit is stored with the power
switch in the OFF (O) position, the internal battery will deplete within 3
months.

Follow these steps to clean the reusable air inlet filter (Figure 1):

1. Remove the filter via the main rear access door (filter door) and
examine for damage or debris on the filter.

2. Wash using one of the following solutions, then rinse thoroughly:

• Liquid dishwashing detergent

• White distilled vinegar (5% acidicy)

• Isopropyl alcohol (99.9%)

• Hydrogen peroxide (3%)

• Bleach

• Sodium hypochloride (6%)

3. Allow the filter to dry completely before reinstalling.

Figure 1: Reusable Air Filter

Reusable
air inlet filter

(gray)

CAUTION: Failure to replace a dirty filter may cause the device to operate at higher

than normal temperatures and damage the device.

CAUTION: Use only Respironics-approved filters.

CAUTION: The gray reusable air inlet filter must be completely dry before use. Never

place a wet filter into the device.

Filter door

4-2 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 4

Periodic Maintenance

Replacing the Air

Inlet Filter(s)

The reusable air inlet filter (gray) must be installed and replaced every year.
An additional ultra-fine disposable filter (white) is also recommended for
enhanced particulate filtering.

CAUTION: Replace any filter that is damaged.

CAUTION: Do not attempt to clean or reuse disposable air inlet filters.

CAUTION: Do not place more than one gray reusable air inlet filters that come with

the ventilator into the device at the same time. One gray reusable air inlet
filter and one white disposable ultra-fine filter may be used.

Replacing the Battery WARNING: To avoid the risk of fire, use only Respironics-approved batteries. All battery

connections are keyed to ensure proper connection. Do not attempt to connect
a battery incorrectly. Only qualified technicians should install the battery.

NOTE: NOTE: If a Low Battery or Battery Depleted alarm occurs during Pre-

Operational Check, then the battery requires charging. If a Batt. Charge
Failure alarm occurs, the battery may be fully depleted. A re-charge is
recommended before proceeding. If the battery does not begin to charge
after one hour and the Batt. Charge Failure persists, contact customer
service for a replacement battery.

NOTE: Battery alarms will sound towards the end of the battery test. Gas delivery

will continue during this time, until the battery is depleted.

If the number of battery powered operations is greater than 220 per year, the
battery should be replaced every six months. If the number of battery
powered operations is less than 220 per year, the battery should be replaced
every year. It is recommended that the battery be tested once per month. A
fully charged battery is designed to operate for 45 minutes at default settings
(See “Power” on page 3-11). If the battery does not continue to deliver gas for
45 minutes at these settings, it should be replaced.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 4-3

Chapter 4

Periodic Maintenance

Battery compartment

Battery cable
connector

Figure 4-1: Replacing the Battery

Follow these steps:

1. Turn the system OFF and disconnect the DC power supply.

2. Remove the two screws that secure the battery compartment door.

3. Unplug the battery cable and remove the old battery from its
compartment.

4. Insert a new Respironics-approved battery (see “BiPAP Focus
Replacement Parts List” on page 9-1) into the compartment and plug
the battery cable into its connector.

5. Replace the battery compartment door and screws.

6. Reconnect the DC power supply.

CAUTION: Use only Respironics-approved batteries.

4-4 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 5. Diagnostic Mode and

Troubleshooting

This section describes the BiPAP Focus diagnostic mode and other
troubleshooting procedures.
Diagnostic mode allows:

• View product information, including serial numbers and versions of

software and hardware.

• View and adjust system settings, including Language, time since last

service, date and time.

• View and adjust operator preferences, including units of pressure,

alarm volume, contrast, brightness, reverse video and screen lock.

• View the significant event log.

• View the UI board controls and sensor readings for troubleshooting.

• Test alarm indicators and view internal voltages for troubleshooting.

• Test blower and controller board backup alarm.

Entering Diagnostic

Mode

WARNING: Diagnostic mode suspends normal ventilation: disconnect the patient from

the ventilator before entering diagnostic mode.

CAUTION: Troubleshooting and repair should be performed only by a qualified

service technician.

To enter diagnostic mode, simultaneously press the Alarm/Reset and Alarm/
Silence keys on the ventilator front panel at power up for 15 seconds or until
diagnostic mode appears on the screen. At the warning prompt, press Enter to
start diagnostic mode. The diagnostic main menu (Figure 5-1) appears.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-1

Chapter 5

Diagnostic Mode and Troubleshooting

Figure 5-1: Diagnostic Mode Main Menu

Press the arrow keys to highlight the menu selection, then press Enter.

To exit diagnostic mode at any time, turn the ventilator off.

Product Information The product information screen (Figure 5-2) displays serial number and

version number information for hardware and software components of the
ventilator.

To view the product information screen, use the arrow keys to highlight
PRODUCT INFORMATION on the diagnostic mode main menu, then
press Enter. Press Menu to return to the main menu.

Figure 5-2: Diagnostic Mode: Product Information Screen

5-2 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Diagnostic Mode and Troubleshooting

System Settings The systems settings screen (Figure 5-3) allows:

• Set the date and time: select the month, day, year, hour, minute, and

12- or 24-hour format.

• Language, Time Since Service: choose the Language and reset the

time since the last service

1. Use the arrow keys to highlight the field or button whose value to

change, then press Enter.

2. Use the arrow keys to adjust a value or select a setting from a drop-

down menu, then press Enter (or press Cancel to exit without making a
change).

3. Press the Menu key to return to the main menu.

Chapter 5

Figure 5-3: Diagnostic Mode: System Settings Screen

Preferences The preferences screen (Figure 5-13) allows:

• Adjust display units.

• Adjust alarm volume.

• Adjust display contrast.

• Adjust display brightness.

• Select reverse or normal video.

• Adjust screen lock timer.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-3

Chapter 5

Diagnostic Mode and Troubleshooting

Figure 5-4: Diagnostic Mode: Preferences Screen

To view the preferences screen, use the arrow keys to highlight PREFERENCES
on the diagnostic mode main menu, then press Enter.

1. Use the arrow keys to highlight the button whose value to change, then
press Enter:

2. If selected:
Display Units, the screen shows the current ventilator units settings.
Use the arrow keys to highlight cmH

O, hPa, or mbar then press Enter.

2

Alarm Volume, a popup screen displays the current alarm volume
setting. Use the arrow keys to adjust the volume from 1 to 5 (in
increments of 1), then press Enter (or press Cancel to exit without
making a change). The alarm volume cannot be turned completely off.

Contrast, a popup screen displays the current display contrast setting.
Use the arrow keys to adjust the contrast from 20% to 100% (in
increments of 20%), then press Enter (or press Cancel to exit without
making a change).

Brightness, a popup screen displays the current display brightness
setting. Use the arrow keys to adjust the contrast from 10% to 100%
(in increments of 10%), then press Enter (or press Cancel to exit
without making a change).

Reverse Video, pressing Enter toggles between reverse and normal
video.

Screen Lock Timer, the screen displays on/off lock setting. Use the
arrow keys to select, the press Enter.

3. Press the Menu key to return to the main menu.

5-4 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log The significant event log (Figure 5-5) allows viewing a log of system events,

including settings changes, alarms, and codes that can be used for
troubleshooting. See “Significant Event Log” on page 5.which describes
significant event codes in detail. The log includes the 200 most recent events.

Setting Up the Serial

Interface for DRPT

Figure 5-5: Diagnostic Mode: Significant Event Log

To view the significant event log, use the arrow keys to highlight SIGNIFICANT
EVENT LOG on the diagnostic mode main menu, use the arrow keys to scroll

up and down. Press Menu to return to the main menu.

Follow these steps to connect the ventilator and a PC to create a diagnostic
report (DRPT):

1. Connect BiPAP Focus Communications Cable (P/N 1030010)

between the PC and BiPAP Focus ventilator. Connect the male end
labeled Diagnostics to the back of the ventilator and the female end to
the service PC.

2. Power up the ventilator in diagnostic mode: simultaneously press the

Alarm/Reset and Alarm Silence keys for approximately 15 seconds
while turning ventilator power on.

3. Launch the HyperTerminal program on the PC by clicking Start >

Programs > Accessories > Communications > HyperTerminal, then
double-clicking on the HyperTerminal icon.

4. Enter a name for the connection (BiPAP Focus Communications is

entered in Figure 5-6) and choose an icon, then click OK).

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-5

Chapter 5

Diagnostic Mode and Troubleshooting

Figure 5-6: Entering a Name for the Connection to the BiPAP Focus Ventilator

5. Select the appropriate serial port (Figure 5-7 shows Com1 selected),
then click OK.

Figure 5-7: Selecting the Serial Port

6. Enter these settings for the serial port (Figure 5-8):

Figure 5-8: Serial Port Settings

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Chapter 5

Diagnostic Mode and Troubleshooting

7. Click OK.

8. The blank HyperTerminal window remains. Continue configuring the

properties. Click File > Properties from the menu bar.

9. Click on the Settings tab (Figure 5-9).

10. Select ANSIW from the Emulation drop-down list box.

Figure 5-9: HyperTerminal Settings Tab

11. Click the Terminal Setup button.

12. Select underline and blink for cursor settings then click OK.

Figure 5-10: Terminal Settings

13. Click the ASCII Setup button (Figure 5-9).

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-7

Chapter 5

Diagnostic Mode and Troubleshooting

14. Match the ASCII Setup screen (Figure 5-11), then click OK.

Figure 5-11: ASCII Setup Screen

15. Save this configuration. Select File > Save As and save to the desktop
if you want to create an icon for BiPAP Focus Communications on the
Windows desktop.

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Chapter 5

Diagnostic Mode and Troubleshooting

Generating a

Diagnostic Report

(DRPT)

1. With the BiPAP Focus ventilator in diagnostic mode and the serial

communcations cable, the end labeled Diagnostics connected to the
ventilator, start HyperTerminal, open the BiPAP Focus
Communications file, or click on the BiPAP Focus Communications
icon on the PC (if created).

2. Type DRPT (all caps) in the dialog box, and press the Enter key. This

pulls information found in the significant event log.

3. If the ventilator is connected and communication occurs, a response

similar to the following appears:

Respironics Inc. BiPAP Focus Ventilator

Serial Number: 8772060206-04

Date & Time : 6/19/06 20:49

Event ID Date Time

905 Pwr O n r e set 6/1 9 / 0 6 20:43

300 POS T S u c ce ssful 6/1 9 / 0 6 20:43

102 Pow e r O f f 6/1 9 / 0 6 20:42

4 3 7 B a t t e r y V o l t a g e F a i l e d 6 / 1 9 / 0 6 2 0 : 4 2 V 6 1 5 , 6 1 5

639 Dis c o n n e ct 6/1 9 / 0 6 20:42

6 3 5 B a t t e r y D e p l e t e d 6 / 1 9 / 0 6 2 0 : 4 2 6 3 7 , 6 3 3

644 Apne a 6/19/06 20 : 4 2

639 Disconnect 6/19/06 20:

6 3 5 B a t t e r y D e p l e t e d 6 / 1 9 / 0 6 2 0 : 4 1 6 8 7 , 6 4 9

6 4 3 L o w B a t t e r y 6 / 1 9 / 0 6 2 0 : 4 1 7 1 4 , 7 2 3

905 Pwr O n r e set 6/1 9 / 0 6 20:41

300 POS T S u c ce ssful 6/1 9 / 0 6 20:41

102 Pow e r O f f 6/1 9 / 0 6 20:41

905 Pwr O n r e set 6/1 9 / 0 6 20:26

300 POS T S u c ce ssful 6/1 9 / 0 6 20:26

102 Pow e r O f f 6/1 4 / 0 6 16:52

905 Pwr O n r e set 6/1 3 / 0 6 16:32

300 POS T S u c ce ssful 6/1 3 / 0 6 16:32

102 Pow e r O f f 6/1 3 / 0 6 16:32

639 Dis c o n n e ct 6/1 3 / 0 6 16:31

905 Pwr O n r e set 6/1 3 / 0 6 16:27

300 POST Successful 6/13/06 16:27

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-9

Chapter 5

Diagnostic Mode and Troubleshooting

Figure 5-12 shows how to interpret each line of the DRPT report.

437 Battery Voltage Failed 6/19/06 20:42 V 615,615

615, 615 - Actual
measurement value
(A/D counts)

V or T - System errors
V= voltage, T= temperature

20:42 - Time stamp of most recent

diagnostic mode occurrence

6/19/06 - Date stamp of most recent
diagnostic code occurrence

Battery Voltage Failed - description

437 - Diagnostic Code

Figure 5-12: Interpreting the DRPT Report

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Diagnostic Mode and Troubleshooting

Sensor Readings The sensor readings screen (Figure 5-13) allows:

View sensor readings: view these readings to see the real-time effect of
changes to voltages, temperature and control signals.

Chapter 5

Figure 5-13: Diagnostic Mode: Sensors Screen

Table 5-1 defines sensor readings for the BiPAP Focus.

NOTE: Hi = 1 and Lo = 0

Sensor Readings Defined

Diagnostics Label Actual Measured Value Description

+3.3V +3.3V_MEAS Measurement of +3.3V

Supply count limits: 883 to 976

Voltage (V) = counts * 0.003662

+5V +5V_MEAS Measurement of +5V

Supply count limits: 884 to 977

Voltage (V) = counts * 0.005371

+12V +12V_MEAS Measurement of +12V supply

Count limits: 889 to 983

Voltage(V) = counts * 0.012817

Table 5-1: Sensor Readings Defined (Sheet 1 of 4)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-11

Chapter 5

Diagnostic Mode and Troubleshooting

Diagnostics Label Actual Measured Value Description

+18Vin 18VIN_MEAS Measurement of +18V (mains input)

+18V Boost 18V_BOOST_MEAS Measurement of +18V_Boost supply

VBATT/VTEMP VBATT_VTEMP_MEAS Battery Temperature measurement when

Sensor Readings Defined

Count limits: 882 to 1008

Voltage(V) = counts * 0.019043

Count limits: 923 to 1020

Voltage(V) = counts * 0.019043

unit operating from Mains or Battery
Voltage measurement when operating on
battery.

Counts limit (volt.): 624 to 936

Voltage(V) = counts * 0.012817

Counts limit (temp.): 79 to 421

Within limits - battery temp ok.

VOptoCap OPTO_CAP_MEAS Measurement of backup capacitor voltage

on User Interface Board.

Count limits: 616 to 782

Voltage(V) = counts * 0.005371

Board Temp BOARD_TEMP_MEAS Measurement of temperature on the User

Interface PCB

Count limits: 233 to 540

Temp. (degC) = ((counts * .00244) - 0.6) *
100

Ambient Temp TEMP_DATA Measurement of Ambient Temperature

within the unit

Limits : 0 to 60degC.

+18VINCMP VIN_COMP_BUF Signal for detection if the incoming mains

voltage is above a certain threshold
(15.64V typically).

Hi: Above threshold

Lo: Below threshold

Table 5-1: Sensor Readings Defined (Sheet 2 of 4)

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Diagnostic Mode and Troubleshooting

Sensor Readings Defined

Diagnostics Label Actual Measured Value Description

+18VBSTCMP 18V_BOOST_COMP Signal for detection if the 18V_Boost mains

voltage is above a certain threshold
(15.64V typically)

Hi: Above threshold

Lo: Below threshold

BattChrgFault BATT_CHRG_FAULT_BUF Signal for detection if there is a fault in the

battery charging

Hi: Fault

Lo: No Fault

BattOnChrg BATT_ON_CHG_BUF Signal for detection if the battery is being

charged

Hi: Battery charging

Lo: Battery not charging

BattChrgToc BATT_CHR_TOC Signal for detection if a top-off charge is

being applied to battery

Hi: Battery NOT in TOC state

Lo: Battery in TOC state

BattChrgRdy BATT_CHG_READY_BUF Signal for detection if the battery is ready

PORLATCH EXT_WDOG_LATCHED Signal for detection if the processor was

for charging

Hi: Ready for charging

Lo: Not ready for charging

reset due to a drop in the +3.3V rail. This
signal must be primed by software, with the
EXT_WDOG_LATCH_CLR signal. This can
be done using the PORLATCLK diagnostics
label in the System Test screen.

Hi: Loss of +3.3V supply caused last reset

Lo: Last reset not caused by loss of +3.3V
supply. Probably caused by watchdog
(software reset)

Table 5-1: Sensor Readings Defined (Sheet 3 of 4)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-13

Chapter 5

Diagnostic Mode and Troubleshooting

Diagnostics Label Actual Measured Value Description

PWRSWMON PWR_SW_MON_PROC User interface Standby Key monitor

PWRSWLATCH PWR_SW_LATCHED Latched User interface Standby Key

Sensor Readings Defined

Hi: Standby key is in-active (released).

Lo: Standby key is active (pressed).

monitor. This signal must be primed by
software with the PWR_SW_CLK signal.
This can be done using the PWRSWCLK
diagnostics label in the System Test screen.

Hi: Standby key has NOT been pressed.

Lo: Standby key has been pressed.

Table 5-1: Sensor Readings Defined (Sheet 4 of 4)

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Diagnostic Mode and Troubleshooting

System Test The alarm, indicator, and voltage screen (Figure 5-14) allows:

• Test alarms: toggle the primary alarm speaker, backup alarm speaker,

or remote alarm ON or OFF.

• Indicators: toggle the Alarm LED, Silence LED, and the On Battery

LED, ON or OFF.

• Miscellaneous Tests: toggle the following settings ON or OFF:

Blower, VBattMeasEn, V Out Enable, POWERSWCLK, PWRTUIOFF,
PORLATCLK, WDSTROBE.

NOTE: When the V BattMeasEn signal is asserted is enables the measurement

of the Battery Thermistor temperature on the sensor readings screen.

Chapter 5

Figure 5-14: Diagnostic Mode: System Test Screen

System Test Defined

Diagnostics
Label Schematic Label Description

BLOWER TCB_SWITCH_ON

and
TCB_SWITCH_OFF

V BattMeasEn VBATT_MEAS_EN Selects ADC measurement of battery voltage or battery

Table 5-2: System Test Defined (Sheet 1 of 2)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-15

Used to turn blower on/off TCB_SWITCH_ON Hi and
TCB_SWITCH_OFF Lo: Blower ON TCB_SWITCH_ON Lo
and TCB_SWITCH_OFF Hi: Blower OFF

These signals are mutually exclusive in software

temperature

Hi: Battery voltage measured by ADC
Lo: Battery temperature measured by ADC

Chapter 5

Diagnostic Mode and Troubleshooting

Diagnostics
Label Schematic Label Description

V Out Enable VOUT_EN Option to turn on/off the power out to the TCB.

PWRSWCLK PWR_SW_CLK Clocks the Standby Switch latch.

PWRTUIOFF PWR_TUI_OFF PWR_TUI_OFF: Control line to switch off the power.

PORLATCLK EXT_WDOG_LATC

H_CLR

System Test Defined

Reserved for future use. Therefore, the option to control
the power to the UI cannot be changed in software.

If used, the following applies:
HI: Turns on the 18V_Boost out to the Controller Board.
LO: Turns off the 18V_Boost out to the Controller Board.

Lo to Hi: Clocks a '1' to the latch output.
Hi to Lo: No change of state.

Hi: Clears the latch which removes the 18V_Boost rail
from the system, thereby shutting down power by placing
the unit in Standby mode.

Lo: No change in state

Clocks the Power On Reset latch. This can be used to
determine if an external power on reset has occurred due
to the +3.3V rail dropping.

Significant Event

Codes

Lo to Hi: No change of state.
Hi to Lo: Clocks a '1' to the latch output.

WDSTROBE WDSTROBE WDSTROBE: External watchdog strobe. Software is

required to apply a high pulse of 50ns minimum duration
at a maximum of every 1.2seconds to avoid the watchdog
resetting the processor.

Table 5-2: System Test Defined (Sheet 2 of 2)

The BiPAP Focus Ventilator generates a log of system events, including
settings changes, alarms, and codes that can be used for troubleshooting. If a
ventilator inoperative condition or unexpected reset occurs, the significant
event log includes the ventilator settings, patient data, and alarm conditions
that were in effect.

The significant event log can include at least 200 of the most recent events,
with the most recent events listed first. The ventilator maintains the significant
event log regardless of whether there is power to the ventilator.

The significant event log includes the following information:

1. Event ID: This includes a code and brief text description of the event.

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2. Date: Each event is date-stamped in a month/day/year format (for

example, 10/20/02).

3. Time : Each event is time-stamped in hour/minute/second format (for

example, 09:15:23).

4. Old value: For settings changes, the previously selected value is

displayed.

5. New value: For settings changes, the most recently selected value is

displayed.

Use the arrow keys to scroll through the log.

NOTE: Table 5-3 lists event IDs, and recommends corrective actions if

appropriate. When performing corrective actions:

• Perform the corrective actions in the order listed (if applicable)
until the problem is resolved.

• Before replacing a part, slave in a replacement part to verify that
it corrects the problem. If so, verify that the problem recurs with
the original part installed, then replace the part and confirm that
the problem is corrected.

Significant Event Log: Event IDs

Code Short text for code Comment / Corrective Action

1 ERR SOFTWARE Controller processor detected a software error.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

2 ERR PROGRAM CRC FAILURE Controller processor detected a program memory

checksum error.

If this persists replace the controller PCB.

3 ERR EXTERNAL RAM

FAI LUR E

4 ERR FIQ STACK OVERFLOW Controller processor detected a stack overflow.

Table 5-3: Significant Event Log: Event IDs (Sheet 1 of 22)

Controller processor detected an external RAM memory
error.

If this persists replace the controller PCB.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-17

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

5 ERR FIQ STACK UNDERFLOW Controller processor detected a stack underflow.

6 ERR NEST STACK OVERFLOW Controller processor detected a stack overflow.

7 ERR NEST STACK

UNDERFLOW

8 ERR IRQ STACK OVERFLOW Controller processor detected a stack overflow.

9 ERR IRQ STACK UNDERFLOW Controller processor detected a stack underflow.

Significant Event Log: Event IDs (Continued)

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected a stack underflow.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

10 ERR TMR STACK OVERFLOW Controller processor detected a stack overflow.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

11 ERR TMR STACK

UNDERFLOW

12 ERR SVC STACK OVERFLOW, Controller processor detected a stack overflow.

13 ERR SVC STACK UNDERFLOW Controller processor detected a stack underflow.

14 ERR THREAD STACK

OVERFLOW

15 ERR ARM UNDEFINED

INSTRUCTION EXCEPTION

Controller processor detected a stack underflow.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected a stack overflow.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected an unexpected exception.

If this persists and to multiple resets and the system
declaring a system error because too many errors
occurred in 24 hours, replace the controller PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 2 of 22)

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Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

16 ERR ARM SWI EXCEPTION Controller processor detected an unexpected exception.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

17 ERR ARM PREFETCH

EXCEPTION

18 ERR ARM ABORT EXCEPTION Controller processor detected an unexpected exception.

20 ERR AIC DEFAULT HANDLER Controller processor detected an unexpected interrupt.

Controller processor detected an unexpected exception.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

21 ERR AIC SPURIOUS

HANDLER

22 ERR CAL DATA CRC FAILURE Controller processor detected a calibration data

23 ERR INVALID DRIFT INDEX AT

CAL

24 ERR UNRECOGNIZED CAL

VERSION BY SW

Controller processor detected an unexpected interrupt.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

checksum error.

1. Attempt to re-calibrate the system.

2. If this fails, replace the controller PCB.

Controller processor detected that the flow sensor drift
check has failed. Flow sensor drift and calibration
information can be monitored using the "D) Drift
Screen" from the debug screen using the RASP utility,
capture screen output to a file.

1. Attempt to re-calibrate the system.

2. If this fails, replace the controller PCB.

Controller processor detected that the calibration table
version check has failed.

1. Attempt to re-calibrate the system.

2. If this fails, replace the controller PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 3 of 22)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-19

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

25 ERR DRIFT FLOW TOO HIGH Controller processor detected that the flow sensor drift

27 ERR DRIFT PRESSURE TOO

HIGH

28 ERR CAL DATA BLANK Controller processor detected that the calibration table

29 ERR DRIFT SECONDARY

PRESSURE TOO HIGH

30 ERR INVALID NVDATA

SCHEMA

31 ERR INVALID NVDATA LOCK Controller processor detected an error accessing the

32 ERR INVALID NVDATA

CHECKSUM

33 ERR NVDATA STORAGE

ERROR

Significant Event Log: Event IDs (Continued)

check has failed.

Flow sensor drift and calibration information can be
monitored using the "D) Drift Screen" from the debug
screen using the RASP utility, capture screen output to
a file.

1. Attempt to re-calibrate the system.

2. If this fails, replace the controller PCB.

Controller processor detected that the drift check on
the primary pressure has failed. Pressure sensor drift
and calibration information can be monitored using
using the "D) Drift Screen" from the debug screen using
the RASP utility, capture screen output to a file.

1. Attempt to re-calibrate the system.

2. If this fails,replace the controller PCB.

is blank.

1. Attempt to re-calibrate the system.

2. If this fails, replace the controller PCB.

Controller processor detected that the drift check on
the secondary pressure has failed.

1. Attempt to re-calibrate the system.

2. If this fails, replace the controller PCB.

Controller processor detected an error in format of the
calibration data in EEPROM.

1. Attempt to re-calibrate the system.

2. If this fails,replace the controller PCB.

calibration data in EEPROM.

1. Attempt to re-calibrate the system.

2. If this fails,replace the controller PCB.

Controller processor detected a checksum error on the
calibration in EEPROM.

1. Attempt to re-calibrate the system.

2. If this fails,replace the controller PCB.

Controller processor detected that the data structure is
bigger than the EEPROM device.

1. Attempt to re-calibrate the system.

2. If this fails,replace the controller PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 4 of 22)

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Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

34 ERR NVDATA QUEUE FULL Controller processor detected that the queue to the

EEPROM manager thread is full.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

35 ERR NVDATA READBACK

FAI LUR E

36 ERR NVDATA RANGE

FAI LUR E

37 ERR CORRUPT RTC VALUE Controller processor detected that the Real Time Clock

Controller processor detected that a write operation to
EEPROM failed the readback check.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that a write operation to
EEPROM failed the range check for that data item.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

time and the RTOS tick timer has drifted since it was
last tested. When changing the time, this could happen
and an RTC Failure Alarm maybe annuciated, this
alarm can be reset by pressing Alarm Reset.

No action necessary.

38 ERR RTC NOT TICKING Controller processor detected that the Real Time Clock

39 ERR UI QUEUE FULL Controller processor detected a RTOS queue full

40 ERR INVALID BIST TEST

CALL

time and the RTOS tick timer has drifted significantly
(>4 seconds) since it was last tested. When changing
the time, this could happen and an RTC Failure Alarm
maybe annuciated, this alarm can be reset by pressing
Alarm Reset.

No action necessary.

condition.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected an invalid BIST test was
attempted to be run.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 5 of 22)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-21

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

41 ERR PRESSURE REG OVER Controller processor detected that a high pressure

42 ERR BIST THREAD LOCKED Controller processor detected that the built in selftest

43 ERR ALARM VOLTAGE

FAI LUR E

44 ERR 12VREF FAILURE Controller processor detected that the limits test on the

Significant Event Log: Event IDs (Continued)

condition (i.e. 5 cmH20 above the IPAP or CPAP
setting) lasted for greater than ten seconds.

1. Check for kicked tubes on the Primary pressure
sensor.

2. Check for blockages near the Primary pressure
sensor in the gas outlet port.

3. Replace the controller PCB.

4. If this persists replace the pneumatics subassembly
(blower and valve).

thread is locked, i.e. it's not alive as expected.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the backup alarm
buzzer voltage test failed a limits check for greater than
five seconds.

1. Enter Diagnostics mode and use the System Test
screen, to check if the backup alarm can be turned
on and off.

2. Replace the controller PCB.

12V reference voltage signal failed.

Replace the controller PCB.

45 ERR 5VREF FAILURE Controller processor detected that the limits test on the

46 ERR VBULK FAILURE Controller processor detected that the limits test on the

47 ERR NEG15VREF FAILURE Controller processor detected that the limits test on the

48 ERR FL12 SENSOR RAILED Controller processor detected that the limits test on the

5V reference voltage signal failed.

Replace the controller PCB.

VBULK reference voltage signal failed.

Replace the controller PCB.

-15V reference voltage signal failed.

Replace the controller PCB.

Flow sensor signal failed.

1. Replace the controller PCB.

2. If this persists replace the pneumatics subassembly
(blower and valve)

Table 5-3: Significant Event Log: Event IDs (Sheet 6 of 22)

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Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

49 ERR PV2 SENSOR FAILURE Controller processor detected that the limits test on the

secondary pressure sensor signal failed.

1. Replace the controller PCB.

2. If this persists replace the pneumatics subassembly
(blower and valve)

50 ERR FLASH FAILURE Controller processor detected a Boot Flash failure

Replace the controller PCB.

51 ERR UNRECOGNIZED BOARD

REV

52 ERR MOTOR FAILURE Controller processor detected a stalled blower, i.e. less

53 ERR BLOWER RPM FAILED

TOLERANCE

54 ERR BLOWER OFF CURRENT

HIGH

55 ERR PRINTF BUFFER

OVERFLOW

Controller processor detected an out of range board
revision

Replace the controller PCB.

than 1000 RPM.

1. If this persists replace the pneumatics subassembly
(blower and valve).

2. If this persists, replace the controller PCB. The
original pneumatics subassembly (blower and valve)
should be re-inserted and the system retested and
recalibrated

Controller processor detected an out of tolerance
blower speed, i.e. outside +/- 5500 RPM from the
target blower speed for more than 5 seconds.

1. If this persists replace the pneumatics subassembly
(blower and valve).

2. If this persists, replace the controller PCB. The
original pneumatics subassembly (blower and valve)
should be re-inserted and the system retested and
recalibrated

Controller processor detected a current draw of more
than 100mA for more than 5 seconds, when the motor
is powered off.

1. If this persists replace the pneumatics subassembly
(blower and valve).

2. If this persists, replace the controller PCB. The
original pneumatics subassembly (blower and valve)
should be re-inserted and the system retested and
recalibrated

Controller processor detected a buffer overflow while
outputting serial data.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 7 of 22)

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Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

56 ERR BLOWER ON CURRENT

HIGH

57 ERR THERAPY EVENT QUEUE

FULL

59 ERR P1 SENSOR RAILED Controller processor detected that the limits test on the

60 ERR P2 SENSOR RAILED Controller processor detected that the limits test on the

61 ERR RTC BATTERY DEAD Controller processor detected that the Real Time Clock

62 ERR BLOWER RPM

EXCEEDED MAX

63 ERR INTERNAL WATCHDOG

FAI LUR E

Significant Event Log: Event IDs (Continued)

Controller processor detected a current draw of more
than 3000mA for more than 10 seconds, when the
motor is powered on.

1. If this persists replace the pneumatics subassembly
(blower and valve)

2. If this persists, replace the controller PCB.

3. The original pneumatics subassembly (blower and
valve) should be re-inserted and the system retested
and recalibrated

Controller processor detected a RTOS queue full
condition.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Primary pressure sensor signal failed.

1. Replace the controller PCB.

2. If this persists replace the pneumatics subassembly
(blower and valve)

Secondary pressure sensor signal failed.

1. Replace the controller PCB.

2. If this persists replace the pneumatics subassembly
(blower and valve)

time and the RTOS tick timer has drifted significantly
since it was last tested. When changing the time, this
could happen and an RTC Battery depleted technical
alert maybe annuciated, this can be reset by pressing
Alarm Reset. No action necessary.

Controller processor detected an out of tolerance
blower speed, i.e. above 23337 RPM for more than 3
seconds.

1. If this persists replace the pneumatics subassembly
(blower and valve)

2. If this persists, replace the controller PCB. The
original pneumatics subassembly (blower and valve)
should be re-inserted and the system retested and
recalibrated

Controller processor detected an internal watchdog
failure.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 8 of 22)

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Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

64 ERR EXTERNAL WATCHDOG

FAI LUR E

65 ERR UNEXPECTED

WATCHDOG

67 ERR RTOS INIT FAILURE Controller processor detected an initialisation failure

Controller processor detected an external watchdog
failure.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected a watchdog failure, when
it wasn't expecting one.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

when starting the RTOS.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

68 ERR SERIAL QUEUE FULL Controller processor detected a RTOS queue full

condition.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

69 ERR SNORE SAMPLING

THREAD LOCKED

70 ERR MAIN EXECUTION

THREAD LOCKED

71 ERR INTERNAL RAM

FAI LUR E

72 ERR EVENT LOG QUEUE

FULL

Controller processor detected that the snore sampling
thread is locked, i.e. it's not alive as expected.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the main execution
thread is locked, i.e. it's not alive as expected.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected an internal RAM memory
checksum error.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected a RTOS queue full
condition.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 9 of 22)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-25

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

75 ERR IPC MSG TOO BIG Controller processor detected an IPC message that was

76 ERR ALARM CAPACITOR

FAI LUR E

77 ERR HIGH PRESSURE

REGULATION

Significant Event Log: Event IDs (Continued)

too big.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the backup alarm
buzzer capacitor test failed a limits check for greater
than five minutes.

1. Enter Diagnostics mode and use the System Test
screen, to check if the backup alarm can be turned
on and off.

2. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller
PCB.

Controller processor detected a high pressure condition
and annuciated the "Hi P Reg" alarm. No action
necessary.

If this condition persists for greater than 10 seconds
then the system will declare system error code 41

78 ERR LOW PRESSURE

REGULATION

79 ERR_LOW_PRESSURE_SUPP

ORT_REGULATION

80 ERR IPC QUEUE FULL Controller processor detected a RTOS queue full

81 ERR IPC INVALID MSGID Controller processor detected an IPC message with an

Controller processor detected a low pressure condition
and annuciated the "Lo P Reg" alarm. No action
necessary.

Unable to maintain Pressure Support. System Error
declared after condition is present for one minute.

condition.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

invalid message id.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 10 of 22)

5-26 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

82 ERR IPC COMMS FAILURE Controller processor detected an IPC message failure, it

can be due to : a low level I2C receive error, a low level
I2C transmit error or that the once a second I'm alive
message was not received

1. Check the UI PCB to Controller PCB IPC 8-way
multi-coloured cable.

2. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller
PCB.

83 ERR IPC CKSUM FAILURE Controller processor detected an IPC message with an

invalid checksum.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

84 SID TUI SOFT RESET IND Controller processor detected an IPC soft reset message

85 SID TCB MODE SETTING FAIL Controller processor detected that the mode setting

which was sent from the UI processor.

1. If this persists replace the controller PCB.

2. If replacing the Controller PCB doesn't fix the issue,
replace the UI PCB.

change is not consistent with the value stored in
EEPROM.

86 SID TCB ST IPAP SETTING

FAI L

87 SID TCB ST EPAP SETTING

FAI L

88 SID TCB ST RISE SETTING

FAI L

Table 5-3: Significant Event Log: Event IDs (Sheet 11 of 22)

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the ST mode IPAP
setting change is not consistent with the value stored in
EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the ST mode EPAP
setting change is not consistent with the value stored in
EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the ST mode rise
time setting change is not consistent with the value
stored in EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-27

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

89 SID TCB ST RATE SETTING

FAI L

90 SID TCB ST ITIME SETTING

FAI L

91 SID TCB ST RAMP TIME

SETTING FAIL

Significant Event Log: Event IDs (Continued)

Controller processor detected that the ST mode breath
rate setting change is not consistent with the value
stored in EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the ST mode
inspiratory time setting change is not consistent with
the value stored in EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the ST mode ramp
time setting change is not consistent with the value
stored in EEPROM.

92 SID TCB ST RAMP START

SETTING FAIL

93 SID TCB CPAP CPAP SETTING

FAI L

94 SID TCB CPAP RAMP TIME

SETTING FAIL

95 SID TCB CPAP RAMP START

SETTING FAIL

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the ST mode ramp
start setting change is not consistent with the value
stored in EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the CPAP mode
CPAP setting change is not consistent with the value
stored in EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the CPAP mode
ramp time setting change is not consistent with the
value stored in EEPROM.

Controller processor detected that the CPAP mode
ramp start setting change is not consistent with the
value stored in EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 12 of 22)

5-28 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

96 SID TCB APNEA SETTING

FAI L

97 SID TCB APNEA RATE

SETTING FAIL

98 ERR TUI SYSTEM ERROR IND A system error has occurred on the UI processor and

300 SID POST SUCCESSFUL POST successful logged to the significant event log

301 SID POST BLOWER SWITCH

CONTROL

302 SID POST SOFTWARE

VERSION MISMATCH

Controller processor detected that the APNEA alarm
setting change is not consistent with the value stored in
EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

Controller processor detected that the #APNEA rate
alarm setting change is not consistent with the value
stored in EEPROM.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller PCB.

the controller processor has been informed of the fact.
The controller processor shuts down.

1. If this persists replace the UI PCB

2. If replacing the UI PCB doesn't fix the issue, replace
the controller PCB.

UI processor detected that the blower switch control
test failed during POST.

1. Check the blower switch control cable.

2. If this persists replace the controller PCB.

3. If replacing the Controller PCB doesn't fix the issue,
replace the UI PCB.

UI processor detected that the UI and Controller
processors have a mismatch in software versions.

Ensure that the download of the released software
completes without any errors reported.

303 SID POST TCB NOT

RESPONDING

During POST the UI processor detected that the
Controller processor did not synchronise with it, it
timed out.

Note: the system must be powered from mains as part
of the software download procedure

1. Check the UI PCB to Controller PCB IPC 8-way
multi-coloured cable.

2. If this persists replace the controller PCB.

3. If replacing the Controller PCB doesn't fix the issue,
replace the UI PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 13 of 22)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-29

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

308 SID POST MAX SYSTEM

RESETS

309 SID POST INDICATOR FAIL UI processor detected one of the leds is faulty during

310 SID POST ABNORMAL

RESTAR

332 SID POST VBATT MONITOR

FAI L

Significant Event Log: Event IDs (Continued)

The system has detected either, 5 soft resets early in
the UI processor POST or the system declaring a
system error because 3 resets occurred in the last 24
hours.

1. Examine the significant event log, check the recent
error codes and see if the Entries point to either a
Controller PCB, Controller subassembly or UI PCB
issue.

2. If this persists replace the UI PCB

3. If replacing the UI PCB doesn't fix the issue, replace
the controller PCB.

POST

1. Enter Diagnostics mode and use the System Test
screen, to test the leds and identify which led is
faulty.

2. If no led is found to be faulty and If this persists and
leads to multiple resets and the system declaring a
system error because too many errors occurred in 24
hours, replace the UI PCB.

The system has detected that a soft reset has occurred
unexpectedly.

1. Examine the significant event log, check the recent
error codes and see if the entries point to either a
Controller PCB, Controller subassembly or UI PCB
issue.

2. If this persists replace the UI PCB

3. If replacing the UI PCB doesn't fix the issue, replace
the controller PCB.

UI processor detected that the VBATT test failed during
POST.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when POST is run on
mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 14 of 22)

5-30 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

333 SID POST 3 3V MONITOR

FAI L

334 SID POST 5 0V MONITOR

FAI L

335 SID POST 12V MONITOR FAIL UI processor detected that the 12V test failed during

336 SID POST 18VIN MONITOR

FAI L

UI processor detected that the 3.3V test failed during
POST.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when POST is run on
mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the 5.0V test failed during
POST.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when POST is run on
mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

POST.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when POST is run on
mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the 18VIN test failed during
POST. Signal is only present while on mains.

1. Check if the problem exists when POST is run on
mains and battery.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 15 of 22)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-31

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

337 SID POST 18VBOOST

MONITOR FAIL

338 SID POST SUPERCAPV

MONITOR FAIL

339 SID POST HIGH INT TEMP

VIO

340 SID POST LOW INT TEMP VIO UI processor detected that the enclosure low

Significant Event Log: Event IDs (Continued)

UI processor detected that the 18VBOOST test failed
during POST.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when POST is run on
mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the SUPERCAP test failed
during POST.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when POST is run on
mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the enclosure high
temperature test failed during POST. (> 60 degrees)

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the temperature readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

temperature test failed during POST. (< -3 degrees)

1. Ensure that the system is at room temperature or
within the operating specifications (5-35° C / 41­95° F).

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the temperature readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 16 of 22)

5-32 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

341 SID POST BOARD OVER TEMP

MONITOR FAIL

342 SID POST BOARD UNDER

TEMP MONITOR FAIL

343 SID POST BATTERY CHARGER

READY MONITOR FAIL

344 SID POST BATTERY CHARGER

FAU LT M ONITOR FA I L

UI processor detected that the board high temperature
test failed during POST.

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the board low temperature
test failed during POST.

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the battery charger ready
signal test failed during POST.

1. Enter Diagnostics mode and use the Sensor
Readings screen, to check the battery charger status
bits.

2. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the battery.

3. If this persists replace the UI PCB

UI processor detected that the battery fault ready
signal test failed during POST.

1. Enter Diagnostics mode and use the Sensor
Readings screen, to check the battery charger status
bits.

2. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replacethe battery.

3. If this persists replace the UI PCB

Chapter 5

Table 5-3: Significant Event Log: Event IDs (Sheet 17 of 22)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-33

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

345 SID POST BATT THERMISTOR

MONITOR FAIL

401 SID CBIT MONITOR RAM FAI UI processor detected that the RAM memory test failed

Significant Event Log: Event IDs (Continued)

UI processor detected that the battery thermistor test
failed during POST.

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Check the battery is present

3. Check the battery wiring for shorts or opens.

4. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

5. Replace battery.

6. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

during CBIT.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

403 SID CBIT MONITOR

PROGRAM CRC FAI

409 SID CBIT INDICATOR FAI UI processor detected that the led test failed during

417 SID CBIT HIGH INT TEMP

ALARM

UI processor detected that the UI program memory
checksum test failed during CBIT.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

CBIT.

If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the enclosure high
temperature is high (> 58 degrees)

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the temperature readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 18 of 22)

5-34 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

419 SID CBIT HIGH INT TEMP VIO UI processor detected that the enclosure high

temperature test failed during CBIT. (> 60 degrees).

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the temperature readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

426 SID CBIT LOW INT TEMP

ALARM

432 SID CBIT 3.3V MONITOR FAIL UI processor detected that the 3.3V test failed during

433 SID CBIT 5.0V MONITOR FAIL UI processor detected that the 5.0V test failed during

UI processor detected that the enclosure low
temperature is low (< 0 degrees).

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the temperature readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

CBIT.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when the system is run
on mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

CBIT.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when the system is run
on mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 19 of 22)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-35

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

434 SID CBIT 12V MONITOR FAIL UI processor detected that the 12V test failed during

435 SID CBIT 18VIN MONITOR

FAI L

436 SID CBIT 18VBOOST

MONITOR FAIL

437 SID CBIT VBATT MONITOR

FAI L

Significant Event Log: Event IDs (Continued)

CBIT.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when the system is run
on mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the 18VIN test failed during
CBIT.

1. Signal is only present while on mains.

2. Check if the problem exists when the system is run
on mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the 18VBOOST test failed
during CBIT.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when the system is run
on mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the VBATT test failed during
CBIT.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when the system is run
on mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 20 of 22)

5-36 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 5

Diagnostic Mode and Troubleshooting

Significant Event Log: Event IDs (Continued)

Code Short text for code Comment / Corrective Action

438 SID CBIT BATT THERMISTOR

MONITOR FAIL

439 SID CBIT BOARD OVER TEMP

MONITOR FAIL

440 SID CBIT BLOWER SWITCH

CONTROL FAIL

441 SID CBIT IPC CBIT TEST FAIL UI processor detected that the IPC test failed during

UI processor detected that the battery thermistor test
failed during CBIT.

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Check the battery is present

3. Check the battery wiring for shorts or opens.

4. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

5. Replace battery.

6. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the board high temperature
test failed during CBIT.

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the blower test failed during
CBIT.

1. Enter Diagnostics mode and use the System Test
screen, to check if the blower can be turned on.

2. Check the blower switch control cable

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

4. If this persists replace the controller PCB.

5. If replacing the Controller PCB doesn't fix the issue,
replace the Blower.

CBIT.

1. Enter Diagnostics mode and use the System Test
screen, to check if the blower can be turned on and
off. Also check that the backup alarm can be turned
on and off.

2. Check the UI PCB to Controller PCB IPC 8-way
multi-coloured cable.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 21 of 22)

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 5-37

Chapter 5

Diagnostic Mode and Troubleshooting

Code Short text for code Comment / Corrective Action

442 SID CBIT BOARD UNDER

TEMP MONITOR FAIL

443 SID CBIT LOW INT TEMP VIO UI processor detected that the enclosure low

444 SID CBIT SUPERCAPV

MONITOR FAIL

445 SID CBIT SETTINGS TEST FAI UI processor detected that the settings cross check test

Significant Event Log: Event IDs (Continued)

UI processor detected that the board low temperature
test failed during CBIT.

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

temperature test failed during CBIT. (< -3 degrees).

1. Ensure that the system is at room temperature or
within the operating specifications as per the
Operator’s Manual.

2. Enter Diagnostics mode and use the Sensor
Readings screen, to check the temperature readings.

3. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

UI processor detected that the SUPERCAP test failed
during CBIT.

1. If running on battery, ensure the system has a
charged battery as per the setup section in the
Operator’s Manual.

2. Check if the problem exists when the system is run
on mains and battery.

3. Enter Diagnostics mode and use the Sensor
Readings screen, to check the adc readings.

4. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

failed during CBIT.

1. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the UI PCB.

2. If this persists and leads to multiple resets and the
system declaring a system error because too many
errors occurred in 24 hours, replace the controller
PCB.

Table 5-3: Significant Event Log: Event IDs (Sheet 22 of 22)

5-38 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A

Chapter 6. Ventilator Communications

This section describes ventilator communications functions, including:

• Installing Service Center Tools and BiPAP Focus operational software
onto the service PC.

• Phase 1 - Download controller board software to BiPAP Focus
Ventilator.

• Phase 2- Download user interface software to the BiPAP Focus
Ventilator.

• Reprogramming the BiPAP Focus serial number

The service PC must be equipped with Windows XP, and a USB port. The
service PC must have administrator privileges to load the BiPAP Focus
communications software.

CAUTION: Be sure the ventilator is powered by the mains power and not running on

battery power. This is to prevent possible power loss.

CAUTION: The ventilator must be recalibrated following a software download.

Download Service

Software to the

Service PC

The most current revisions of the Service Center Tools Suite and BiPAP Focus
operational software should be downloaded from the Respironics Service
website.

1. Go to the URL http://servicesoftware.respironics.com and click on
Respironics Utility Tools.

2. Click the download button next to Service Center Tools Suite.

3. Download this utility to the service PC.

4. Extract the file Service-Center-Tools.exe and launch the installation
wizard.

5. Go to the URL http://servicesoftware.respironics.com and click on

Respironics Products Operating Software Updates.

6. Click the download button next to Bipap Focus Operational Software
to download the most current revision.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 6-1

Chapter 6

Ventilator Communications

Installing

Communications

Software on the

Service PC

Communications software allows the ventilator to communicate with the
service PC. Follow these steps to install BiPAP Focus communications software
onto a service PC:

1. Connect the universal serial bus (USB) cable between the service PC
and ventilator.

NOTE: Do not connect the USB cable through a hub or docking station. Using

an intermediate connection causes communication errors.

2. Connect the female end of the serial communications cable to the
service PC. Then connect the male end labeled Software/Rasp to the
ventilator.

3. If the software drivers for the communications software are not already
installed on the PC, the New Hardware Found Wizard appears when
the ventilator is powered on. Select “Install software automatically”
and click Next. Refer to Figure 6-1. If drivers are loaded proceed to
step ‘1.’ on page 6-4.

Figure 6-1: New Hardware Wizard

4. Select the BEST driver then click Next. Refer to Figure 6-2.

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Ventilator Communications

Figure 6-2: New Hardware Wizard - Selecting the driver

Chapter 6

5. The software begins installing software on the PC. If the Windows XP

compatibility warning appears click Continue Anyway. Refer to Figure
6-3.

Figure 6-3: New Hardware Wizard - Windows XP Warning

6. When the software completes the software installation the Completing

the Found New Hardware Wizard dialog box appears. Click Finish.
Refer to Figure 6-4.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 6-3

Chapter 6

Ventilator Communications

Figure 6-4: Completing the Found New Hardware Wizard dialog box

Starting the BiPAP

Focus Wizard

Downloading

Controller Board

Software to the

Ventilator

7. Once the drivers for software downloads are complete the process for
loading the BiPAP Focus can begin.

The BiPAP Focus Wizard is comprised of two phases:

• Phase 1 - Downloading controller board software to the ventilator.

• Phase 2 - Downloading user interface software to the ventilator.

1. Start the ventilator in Download Mode. Press the Standby key while
pressing the Up and Down arrow keys.

2. Navigate to the wizard executable program:
Install_Focus_Software.exe

3. Double-click on Install_Focus_Software.exe.
This will open Phase 1 of the of the wizard.

Follow these steps to download controller board software from the computer to
the ventilator:

1. This is the Phase 1 Start screen. The screen then shows the order of
installation and Warns “Ensure that there is no patient connected.”
From the Phase 1 Start screen click Next.

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Chapter 6

Ventilator Communications

Figure 6-5: Phase 1 Start Screen

2. Select the desired option from the list and click Next.

Figure 6-6: BiPAP Focus Controller Software Selection Screen

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 6-5

Chapter 6

Ventilator Communications

3. The screen then shows cable connection information (Figure 6-7):
Verify the cables are connected properly then click Next.

NOTE: Do not connect the USB cable through a hub or docking station. Using

an intermediate connection causes communication errors.

NOTE: The female end of the serial communications cable should be connected

to the service PC. The male end, labeled Software/Rasp, should be
connected to the ventilator.

Figure 6-7: Communications Cable Connection Screen

4. The screen shows the controller board software installation process.

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Chapter 6

Ventilator Communications

Figure 6-8: Software Installation Progress Screen

5. Once the controller board software installation is complete, a

completion screen (Figure 6-9) is displayed. Click Finish.

Figure 6-9: BiPAP Focus Controller Board Software Installation Finished

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 6-7

Chapter 6

Ventilator Communications

Downloading UI

Software to the

Ventilator

During this portion of the software installation the alarm enunciator will sound.
Hearing protection may be desired.

1. Follow the onscreen instructions to install the software: confirm that
no patient is connected to the ventilator and that the ventilator is in
download mode (Figure 6-10). Click Next.

Figure 6-10: Phase 2 welcome

2. Connect a universal serial bus (USB) cable between the service PC
and ventilator. If necessary choose the option to display more detailed
connection instructions (Figure 6-11). Click Next.

NOTE: Do not connect the USB cable through a hub or docking station. Using

an intermediate connection causes communication errors.

NOTE: The female end of the serial communications cable should be connected

to the service PC. The male end, labeled Software/Rasp, should be
connected to the ventilator.

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Figure 6-11: Connecting the Ventilator to the Service PC

3. Click Next.

Figure 6-12: Powering Up the Ventilator

4. The software connection process dialog box appears identifying the

steps including, Searching for the ventilator, retrieving ventilator
configuration information, and installing the communications software
(Figure 6-13). Click Next.

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Chapter 6

Ventilator Communications

Figure 6-13: Communications Software Connection

5. Click Next, the ventilator configuration dialog box appears
(Figure 6-14).

Figure 6-14: Ventilator Configuration

6. Click Next, the Ventilator Management dialog box appears
(Figure 6-15), which allows loading new software into the ventilator
configuration or selecting Advanced configuration operations.

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Ventilator Communications

Figure 6-15: Ventilator Management Screen

7. Check one of the ventilator options then click Next.

8. The BiPAP Focus Software Selection screen appears. Select the

software version from the list and click Next.

Figure 6-16: BiPAP Focus UI Software Selection Screen

9. The screen then displays user interface software download information

(Figure 6-17): verify that this information is correct then click Next.

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Chapter 6

Ventilator Communications

Figure 6-17: Verify Software Download Settings

10. The screen then displays the user interface software installation
process, including erasing old user interface software, installing new
interface software, and updating software configuration information
(Figure 6-18). Click Next.

Figure 6-18: New Software Installation

11. Once the user interface software installation is complete, a completion
screen (Figure 6-19) is displayed. Click Finish.

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Chapter 6

Ventilator Communications

Reprogramming the

BiPAP Focus Serial

Number

Figure 6-19: Phase 1 Complete

12. Once the download is complete the ventilator will reset.

13. Disconnect the communication cables.

14. Using the power switch on the back panel turn on power to the device.

15. Press the round Standby key on the front key panel to restart the

BiPAP Focus.

16. The ventilator must now be recalibrated. Proceed to Chapter 7:

Performance Verification.

The serial number of each BiPAP Focus ventilator is stored in nonvolatile
memory on its UI PCB, and must be reprogrammed if you replace the UI PCB.

1. Be sure the serial number of the unit has been written down before

reprogramming the serial number.

2. Navigate to the wizard executable program:

TUI_download_wizard.exe

3. Double-click on TUI_download_wizard.exe.

This will open Phase 2 of the of the wizard.

To program the serial number:

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Chapter 6

Ventilator Communications

1. Follow the onscreen instructions to install the software: confirm that
no patient is connected to the ventilator and that the ventilator is in
download mode (Figure 6-20). Click Next.

Figure 6-20: Phase 2 welcome

2. Connect a universal serial bus (USB) cable between the service PC
and ventilator. If necessary choose the option to display more detailed
connection instructions (Figure 6-21). Click Next.

NOTE: Do not connect the USB cable through a hub or docking station. Using

an intermediate connection causes communication errors.

NOTE: The female end of the serial communications cable should be connected

to the service PC. The male end, labeled Software/Rasp, should be
connected to the ventilator.

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Ventilator Communications

Figure 6-21: Connecting the Ventilator to the Service PC

Chapter 6

3. Once the ventilator and PC are connected, power up the ventilator

while holding down the Up and Down arrow buttons until the ventilator
displays the message Waiting to detect the BiPAP Focus Ventilator
(Figure 6-22). Click Next.

Figure 6-22: Powering Up the Ventilator

4. The software connection process dialog box appears identifying the

steps including, Searching for the ventilator, retrieving ventilator
configuration information, and installing the communications software
(Figure 6-23).

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Chapter 6

Ventilator Communications

Figure 6-23: Communications Software Connection

5. Click Next, the Ventilator Management dialog box appears
(Figure 6-24), which allows loading new software into the ventilator
configuration or selecting Advanced configuration operations.

6. Fill the “I want to perform advanced configuration operations.” check
box then click Next, or click Cancel to exit.

Figure 6-24: Ventilator Management Screen

7. The BiPAP Focus Update Ventilator Configuration screen appears. Fill
the Ventilator Serial Number check box then enter the serial number
in the text box.

8. Click Next.

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Ventilator Communications

Figure 6-25: Update Ventilator Configuration Screen

Chapter 6

9. The screen then displays a Configuration Update Successful message.

Click Next.

10. The Wizard Completion screen appears. Click Finish.

Figure 6-26: Phase 2 Complete

11. Once the download is complete the ventilator will reset.

12. Disconnect the communication cables.

13. The ventilator must now be recalibrated. Proceed to Chapter 7:

Performance Verification.

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Chapter 6

Ventilator Communications

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Chapter 7. Performance Verification

The performance verification verifies the integrity of the ventilator's critical
components using external measurement devices. The performance
verification consists of several tests (Table 7-1).

Performance Verification Tests

Test number Description

1 Electical Safety

2Alarm / LED Test

3 BiPAP Focus System Run-In

4 Real Time Clock Calibration

5 BiPAP Focus Calibration

6 Performance Verification

Table 7-1: Performance Verification: Required Tests

The type of service performed determines which of the tests are required
(Table 7-2). Run required tests in order.

Performance Verification: Required Tests

Service performed Required tests

Annual or two-year preventive
maintenance

Removal/replacement

Controller PCB All.

User Interface PCB All.

Internal battery Alarm/keypad/LED, power transition.

VGA PCB Electical Safety, Alarm/keypad/LED, power

LCD assembly All.

keypad Electical Safety, Alarm/keypad/LED.

main alarm, backup alarm, or remote
alarm connector

Table 7-2: Performance Verification: Required Tests

All.

transition.

Electical Safety, Alarm/keypad/LED, power
transition.

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Chapter 7

Performance Verification

Required Test

Equipment

Table 7-3 summarizes the test equipment required, and Table 7-4 summarizes
the service accessories required for the performance verification. Check the
calibration status of all test equipment before use.

Required Test Equipment for Performance Verification

Description Recommended Manufacturer/Model

Digital multimeter (DMM) and frequency counter
accurate to three decimal places

Electrical safety analyzer Dale LT 5440 or equivalent

Pneumatic calibration analyzer(s) capable of
measuring low pressure (cmH2O), flow rate (LPM),
volume (Liters BTPS), and respiratory rate

Utility Software
Calibration and testing of the BiPAP Focus requires
the use of Respironics Utility Software

Local supplier

Respironics P/N 1012598 or equivalent

Log on to
http:// servicesoftware.respironics.com
and download the Utility Software onto
your PC.

Table 7-3: Required Test Equipment for Performance Verification

Required Service Accessories for Performance Verification

Description Part Number

Adapters, oxygen enrichment
(quantity 2)

Bacteria filter, reusable inspiratory Respironics P/N 1003847

Connector, 22-mm (quantity 2) Respironics P/N 1006242 or equivalent

Coupling, silicone (quantity 2) Respironics P/N C06348

Pressure test adapter Respironics P/N 312710

Reusable Patient Tubing Circuit Respironics P/N C06122

Test orifice, RP20 Michigan Instruments or equivalent

0.25" Test Orifice Respironics P/N 332353

Silicone cork Respironics P/N 1001735

BiPAP Focus Communications Cable Kit
(USB & DB9)

Tee, plastic w/silicone coupling Respironics P/N C06260

Tubing, silicone, 3/16-in. ID x 6.5 ft.
PAP

Respironics P/N 312710 or equivalent

Respironics P/N 1030010

Respironics P/N C06686

Table 7-4: Required Service Accessories for Performance Verification

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Preliminary Cleaning,

Inspection, and Setup

Chapter 7

Performance Verification

WARNING: To prevent disease transmission, use protective equipment when handling

contaminated bacteria filters or other patient accessories. Follow
manufacturers' labeling and institutional guidelines for disposal of
contaminated accessories.

1. Before servicing the ventilator, clean and inspect as follows:

• Remove humidifier connections from the ventilator, if applicable.

• Visually inspect the exterior of the ventilator for damage. Replace
damaged parts as needed.

• Clean the ventilator exterior as described in the BiPAP Focus
Clinical Manual.

• Clean the ventilator interior using an ESD-safe vacuum.

• Remove and inspect the air inlet filters. Clean or replace as
described in the BiPAP Focus Clinical Manual.

2. Connect a standard USB cable between the service PC and the USB
port on the back panel of the ventilator.

3. Download and execute the Service Center Tools software (http://
servicesoftware.respironics.com) and follow the prompts to retrieve the
significant event log (the log includes the ventilator's configuration
and hour meter reading).

4. Print the significant event log and attach to the Performance
Verification Data Form (page 7-29).

Electrical Safety Test The electrical safety test verifies that the ground resistance and forward and

reverse leakage current are within specified limits. Record the following
information on Performance Verification Data Form (page 7-29).

Use the DB9 shell on the Nurse call station / serial
communications port at the back of the ventilator to connect
the electrical safety analyzer to ventilator ground.

1. Check that the ground resistance < 0.2 ohm (Ω).

2. Turn ventilator on and wait until gas delivery begins.

3. Check that the forward and reverse leakage current is < 100
microamperes (µA) for ventilators connected to 100-120 V), or < 300
µA for ventilators connected to 220-240 V.

4. The electrical safety test is complete.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 7-3

Chapter 7

Performance Verification

Alarm/LED Test The Alarm/LED Test confirms the alarms and LEDs are working properly.

Record the following information on Performance Verification Data Form
(page 7-29).

1. Connect system to AC power and start the ventilator in Diagnostic
Mode.

2. Confirm that the ON AC POWER LED is on.

3. Remove the AC power from the back of the ventilator for at least one
minute then reconnect the AC power to the back of the ventilator.

4. Confirm the green BATTERY CHARGING LED illuminates.

5. Navigate to the System Test screen.

6. Use the Up/Down keys to highlight the Primary Audible alarm then
press the Enter key to test the alarm.

7. Use the Up/Down keys to highlight Backup Audible alarm then press
the Enter key to test the alarm.

Figure 7-1: Diagnostic Mode: System Test Screen

To test the Remote alarm use a Digital Multimeter (DMM) with the Nurse call
station / serial communications port.

• When pins 1 and 6 are used, the relay is open
during normal operation, and closed during an
alarm condition including loss of power.

• When pins 1 and 9 are used, the relay is closed
during normal operation, and open during an alarm
condition including loss of power.

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Performance Verification

8. Set the DMM to measure resistance.

9. Turn the ventilator around and connect test leads to pins 1 & 6.

• With the Remote Alarm switch in the OFF position (Refer to Figure
7-1), resistance should be infinite resistance (open circuit).

• Press the Enter key on the front panel. With the Remote Alarm
switch in the ON position, confirm the DMM displays 0±3 ohm
(Ω) (closed circuit).

10. connect test leads to pins 1 & 9.

• With the Remote Alarm switch in the ON position (Refer to Figure
7-1), resistance should be infinite resistance (open circuit).

• Press the Enter key on the front panel. With the Remote Alarm
switch in the OFF position, confirm the DMM displays 0±3 ohm
(Ω) (closed circuit).

Chapter 7

BiPAP Focus System

Run-in

11. Remove the DMM leads and return to the System Test screen.

12. Use the Up/Down keys to highlight the Alarm LED then press the Enter
key to test Alarm LED.

13. Use the Up/Down keys to highlight the Silence LED then press the
Enter key to test Silence LED.

14. Use the Up/Down keys to highlight the ON Battery LED then press the
Enter key to test ON Battery LED.

Before the BiPAP Focus can be calibrated, the device must be run-in for at
least 35 minutes to avoid possible calibration failures.

Equipment Required

0.25" Test Orifice (RI p/n 332353)

Procedure

1. Connect the test orifice to the outlet port of the unit.

2. Enter the therapy setup menu and set the IPAP pressure to 20
cmH

O, and EPAP to 20 cmH2O.

2

3. Run the unit for at least 35 minutes before performing the calibration.

REF 1029568 Rev A BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. 7-5

Chapter 7

Performance Verification

Real-time Clock

Calibration

The BiPAP Focus will record and track several different parameters (e.g.
patient pressures, apnea events, when and how the device is used, error codes,
etc.). To do this in a logical manner and for a technician or therapist to know
exactly when a certain event has occurred, the BiPAP Focus runs and records
events in real-time. This time is checked and compared to your computers
time when running the calibration software. If the time does not match, the
calibration will fail. Therefore, you must perform the real-time clock calibration
before you proceed with the BiPAP Focus calibration.

Equipment Required

• BiPAP Focus Communications Cable Kit (P/N 1030010)

• Utility Software

Procedure

1. Ensure AC power is connected to the BiPAP Focus.

2. Remove the bacteria filter from the ventilator if it is connected.

3. Start the ventilator in Normal mode. Be sure the vent is in S/T mode.

4. Connect the universal serial bus (USB) cable between the service PC
and ventilator.

NOTE: Do not connect the USB cable through a hub or docking station. Using

an intermediate connection causes communication errors.

5. Connect the female end of the serial communications cable to the
service PC. Then connect the male end labeled Software/Rasp to the
ventilator.

6. Open the Service Center Tools and select “Read Serial Number &
Model number”. Write down the serial number and the model number
for use later on during the calibration.

7. Open the Service Center Tools and select “Real-time Clock
Calibration”.

8. Click the red “Set Clock/Verify Clock” button in the upper left-hand
corner to begin calibration (the button will turn green).

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Chapter 7

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Figure 7-2: Begin Calibration

9. In the upper left-hand corner below the menu bar, click the white

run time arrow. The program will set the appropriate date and time on
the BiPAP Focus.

10. When the program has finished, a green "PASS" indicator will appear

at the bottom.

Figure 7-3: CALIBRATION COMPLETE

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Chapter 7

Performance Verification

If Real-Time Clock Calibration Fails

If calibration fails, confirm that the BiPAP Focus Time and Date are set to
within 5 minutes of the service PC. Re-run the calibration. If the calibration
fails again, replace the controller PCB and retest.

MFTS Calibration This procedure provides instructions for calibrating the BiPAP Focus from the

Multi Function Test Station (MFTS). The results of this calibration can be
printed and used as a final test data sheet that can be retained as part of the
device history record.

NOTE: To preform a Field Calibration using a PC refer to “Field Calibration” on

page 7-17.

Multi Function Test Station Set-up (MFTS)

Refer to Figure 7-4. Start the ventilator in Normal mode. While in S/T mode
set the Respiratory Rate to 4bpm.

1. Ensure the computer and monitor are turned “ON”.

2. Ensure the MFTS is connected to a 110 VAC and 220VAC power
source.

Figure 7-4: MFTS Setup

3. Ensure the MFTS is connected to a negative pressure source.

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Performance Verification

4. Remove the bacteria filter from the ventilator if it is connected.

5. Ensure that one end of the 6' Smooth-bor tubing is attached to the

Druck DPI-260 O

6. Ensure that the AC power cord is connected to the MFTS.

7. Ensure the MFTS has been running for a minimum of 1 hour before

being using to calibrate units.

MFTS software setup

1. Double-click the MFTS icon located on the PC's desktop to load

software.

2. Skip the Name and Password dialog box by clicking OK.

port and the other end connected to the ventilator.

2

Chapter 7

Figure 7-5: MFTS Name and Password

3. Click the Open button in the top left-hand corner.

4. Select file name BiPAP Focus Production Post Test and press the

Enter key.

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Chapter 7

Performance Verification

Figure 7-6: Selecting BiPAP Focus Post Test

5. The program will now download the test file.

Unit Under Test setup

1. Select a unit from the warm-up stand and ensure it has been running
for a minimum of 30 minutes. Power of unit and move to the MFTS.

2. Connect the Druck DPI-260 O

3. Connect the power and RS232 cables to the back of the unit.

4. Start the BiPAP Focus in diagnostic mode. Power on the unit and
press the Standby key, then immediately press both the Alarm Silence
and Alarm Reset keys simultaneously until the unit enters diagnostic
mode then press Continue.

Alarm Reset

Alarm Silence

to the outlet of the unit under test.

2

Standby

Figure 7-7: Entering BiPAP Focus Diagnostic Mode

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Performance Verification

Calibration

1. Click the green Test UUT box on the PC screen. Refer to Figure 7-5.

2. The software will now run a series of tests on the UUT. The person

conducting the test will need to follow on-screen instructions
throughout the testing process.

NOTE: Retrieve and WRITE down the BLOWER SUBSYSTEM SERIAL

NUMBER from the BiPAP Focus Product Information screen. It may be
necessary to input the blower subsystem serial number if the memory is
cleared because it failed calibration.

3. When prompted enter serial number of the sub-assembly and click

OK.

Chapter 7

Figure 7-8: Entering Serial Number

4. When prompted enter the model number, enter 1026652 and click

OK.

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Chapter 7

Performance Verification

Figure 7-9: Entering the Model Number

5. When prompted enter “Your Name” and click OK.

Figure 7-10: Entering Calibrator’s Name

6. When asked to verify that the private label is Bi-PAP Focus check and
click PASS if correct or Fail if incorrect.

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