Respironics BiPAP Vision User manual

h
Service
Manual

Copyright © 1998 Respironics. All rights reserved.
The BiPAP Vision Ventilatory Support System is the subject of U.S. patents #5148802, #5239995,
#5313937, #5433193, and other pending U.S. and foreign patents. BiPAP is a registered trademark
of Respironics.

i
Table of Contents
Chapter 1: Introduction ..........................................................................................1-1
1.1 BiPAP Vision Ventilatory Support System Overview ........................................................ 1-2
1.2 Service Notice ................................................................................................................... 1-3
1.3 Technical Support .............................................................................................................. 1-3
Chapter 2: Warnings, Cautions, and Notes .........................................................2-1
2.1 Warnings ............................................................................................................................. 2-2
2.2 Cautions ............................................................................................................................. 2-3
2.3 Notes ................................................................................................................................. 2-4
Chapter 3: Description and Theory of Operation ...............................................3-1
3.1 BiPAP Vision System .......................................................................................................... 3-2
3.2 Power Supply Subsystem (PSS) .......................................................................................... 3-6
3.3 Main Control (MC) ............................................................................................................ 3-8
3.4 Pressure Control (PC) ........................................................................................................3-9
3.5 Display Control (DC) ....................................................................................................... 3-11
3.6 Airflow Module (AFM) ..................................................................................................... 3-14
3.7 Oxygen Module (OM) ...................................................................................................... 3-16
3.8 Description of Ventilator Modes ........................................................................................ 3-17
3.9 Nurse Call / Remote Alarm ................................................................................................ 3-19
3.10 Patient Disconnect Alarm Description ................................................................................ 3-21
Chapter 4: Specifications and Control Ranges ...................................................4-1
4.1 Specifications ..................................................................................................................... 4-2
4.2 Control Ranges and Increments ......................................................................................... 4-5
Chapter 5: Routine Maintenance ..........................................................................5-1
5.1 Cleaning ............................................................................................................................ 5-2
5.2 Replacing the Inlet Filter .................................................................................................... 5-3
5.3 Cleaning / Replacing the Nylon Mesh Inlet Filter .............................................................. 5-4
5.4 Replacing the Oxygen Regulator Filter ............................................................................. 5-6
5.5 Changing the System Fuses ................................................................................................. 5-8
5.6 Voltage Selection ............................................................................................................... 5-10
5.7 Power Cord Inspection ..................................................................................................... 5-10
5.8 InternalAlarm Battery ....................................................................................................... 5-11
5.9 Preventive Maintenance Schedule ...................................................................................... 5-14
Chapter 6: Troubleshooting ....................................................................................6-1
6.1 Overview ............................................................................................................................ 6-2
6.2 Description of System Alarms .............................................................................................. 6-5
6.3 Alarm Indicators ................................................................................................................ 6-7
6.4 Troubleshooting ................................................................................................................... 6-8
6.5 Error Codes ...................................................................................................................... 6-12
6.6 Vent Inop Errors ............................................................................................................... 6-14

ii
Chapter 7: Repair and Replacement ....................................................................7-1
7.1 Contact Information ............................................................................................................ 7-2
7.2 Exploded View ................................................................................................................... 7-3
7.3 BiPAPVision Repair Kits .................................................................................................... 7-5
7.4 Mobile Stand II & III Repair Parts .................................................................................... 7-10
7.5 Replacement Identification Photo’s .................................................................................... 7-11
7.6 Touch Pad Replacement Instructions .............................................................................. 7-59
Chapter 8: Testing and Calibration ......................................................................8-1
8.1 Overview ........................................................................................................................... 8-2
8.2 Recommended Testing after Part(s) Replacement .............................................................. 8-3
8.3 Exhalation Port Test ........................................................................................................... 8-5
8.4 Total Operating Hours Transfer Procedure ........................................................................ 8-8
8.5 Blower / Valve Calibration Procedure ................................................................................ 8-10
8.6 Performance Verification .................................................................................................... 8-12
8.7 Run-In Cycle Procedure .................................................................................................... 8-16
8.8 System Final Test .............................................................................................................. 8-18
8.9 PC/Laptop Set-up Procedure ............................................................................................ 8-37
8.10 Test Cable Usage Definitions ............................................................................................. 8-40
8.11 Oxygen Flow Module Test ................................................................................................ 8-41
Chapter 9: Option Instructions..............................................................................9-1
9.1 PAV/T Mode Installation or EPROM Upgrade .................................................................... 9-2
9.2 Oxygen Baffle Installation Instructions ............................................................................. 9-6
Chapter 10: Summary of Upgrades for Repairs of Vision units with Serial
Numbers 100500 to 106000............................................................ 10-1
10.1 Summary of upgrades for repairs of Vision units w/ serial numbers 100500 to 106000 ........ 10-2
10.2 Repair Kits No Longer Manufactured ...............................................................................10-5
10.3 Installation/Upgrade Instructions for Repair Parts........................................................................ 10-6
Appendix A: Tools and Equipment ....................................................................... A-1
A.1 Service Tools and Supplies ................................................................................................. A-2
A.2 Acceptable Test Equipment ................................................................................................ A-3
A.3 TSI, Inc. Certifier Test System ............................................................................................ A-6
Appendix B: Schematics ........................................................................................ B-1
B.1 Schematic Statement .......................................................................................................... B-2
B.2 Main Control (MC) .......................................................................................................... B-3
B.3 Display Control (DC) ..................................................................................................... B-9
B.4 Pressure Control (PC) ..................................................................................................... B-20
B.5 Air Flow Module (AFM)................................................................................................ B-25
B.6 Oxygen Module (OM).................................................................................................... B-26
B.7 Power Supply ................................................................................................................. B-27

BiPAP Vision Service Manual
Chapter 1: Introduction 1-1
Chp. 1
1015010
Chapter 1: Introduction
1.1 BiPAP Vision Ventilatory Support System Overview.................... 1-2
1.2 Service Notice ................................................................................ 1-3
1.3 Technical Support .......................................................................... 1-3

BiPAP Vision Service Manual
Chapter 1: Introduction
1-2
1015010
Chapter 1: Introduction
1.1 BiPAP® Vision™ Ventilatory Support System Overview
The BiPAP Vision Ventilatory Support System (BiPAP Vision), shown in Figure 1-1, is a microprocessor-controlled,
positive pressure ventilatory assist system. The BiPAP Vision incorporates a user interface with multifunction keys, real
time graphic displays, and integral patient and system alarms.
The BiPAP Vision features a centrifugal blower to generate airflow, as well as hardware and software platforms that can
be upgraded with an oxygen module and additional patient alarms. The system operates in the Continuous Positive
Airway Pressure (CPAP), Pressure Support (S/T), and optional Proportional Assist Ventilation/Timed (PAV/T) modes.
The BiPAP Vision contains a variety of integrated safety and self-diagnostic features. All system functions are checked
at start-up and during operation. Errors are reported by visual and/or audible indicators.
Pressure regulation is achieved by monitoring proximal airway pressure and adjusting flows accordingly to ensure that
the proximal pressure equals the set pressure.
MODE: S/T MONITORING
IPAP
15
cmH
2
O
cmH
2
O
EPAP
6
Rate
Options
12
BPM
%O
2
55
%
V
T
1000
ml
PIP
15
cmH
2
O
MinVent
14
L/min
PS = 9
cmH
2
O
P(cmH
2
O)
Vol(ml)
Flow(L/min)
Figure 1-1
The BiPAP Vision Ventilator

BiPAP Vision Service Manual
Chapter 1: Introduction 1-3
Chp. 1
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1.2 Service Notice
This service manual was prepared by Respironics primarily for use by qualified technicians required to
service the BiPAP Vision.
1.3 Technical Support
Respironics is committed to customer satisfaction, and may be contacted with any questions or for technical support
at the following numbers:
U.S. and Canada
Phone: [phone]
Fax: [phone]
International
Phone: [phone]
Fax: [phone]
E-Mail [email protected]
Visit Respironics Home Page on the World Wide Web at:
http://www.respironics.com

BiPAP Vision Service Manual
Chapter 2: Warnings, Cautions, and Notes
2-1
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Chapter 2: Warnings, Cautions, and
Notes
2.1 Warnings ........................................................................................ 2-2
2.2 Cautions ......................................................................................... 2-3
2.3 Notes .............................................................................................. 2-4

BiPAP Vision Service Manual
Chapter 2: Warnings, Cautions, and Notes 2-2
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Chapter 2: Warnings, Cautions, and Notes
WARNING: Indicates the possibility of injury.
CAUTION: Indicates the possibility of damage to the device.
NOTE: Places emphasis on an operating or procedural characteristic.
2.1 WARNINGS
2.1.1 Safety
• Do not use the BiPAP Vision in the presence of a flammable anesthetic mixture with
air, oxygen, or nitrous oxide.
• Oxygen supports combustion. Do not use oxygen while smoking or in the presence of
an open flame.
• When using the optional oxygen module, the BiPAP Vision does not provide an oxygen
sensor to monitor oxygen concentrations delivered to the patient circuit. Therefore, the
use of oxygen with the BiPAP Vision should be monitored through oximetry.
NOTE: Refer to the Clinical Manual for guidelines on Applications and Operation.
2.1.2 Operational
• If the “Ventilator Inoperable” indicator illuminates, refer to Chapter 6 of this manual for trouble
shooting guidelines.
• Never attach oxygen tubing or any positive pressure source to the pressure port on the
front panel of the BiPAP Vision.

BiPAP Vision Service Manual
Chapter 2: Warnings, Cautions, and Notes
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2.1.3 Service
CAUTION: 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,
ESD-protected environment.
• Do not attempt to make connection to the diagnostic RS232 connector on the back panel of the
BiPAP Vision to obtain repair information while the unit is operating on a patient.
• To assure the safety of the service technician and specified performance of the device,
Respironics recommends that only qualified technicians perform repairs to the BiPAP
Vision. Contact Respironics Technical Service for service training and authorization
information.
• High voltages are present inside this device. To avoid electrical shock, disconnect the
electrical supply before attempting any repairs on the device.
• For continued protection against risk of fire, replace fuses with those of the same type
and rating only.
2.1.4 Cleaning
• To avoid electrical shock, unplug the BiPAP Vision unit before cleaning it.
2.2 CAUTIONS
• While cleaning the unit, do not allow any liquid to enter the cabinet or the inlet filter.
• Care should be taken to avoid exposing the BiPAP Vision to operating, storage, and
transport temperatures near the extremes specified in Chapter 4. If exposed to such
temperatures, allow the unit to cool or warm to room temperature before turning it on.
• The unit must be positioned on its base for proper operation.
• Always use an inlet filter when the BiPAP Vision is in use.
• If using the oxygen module, do not exceed 100 psig oxygen supply pressure.
Warnings (Continued)

BiPAP Vision Service Manual
Chapter 2: Warnings, Cautions, and Notes 2-4
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2.3 NOTES
• This device contains a rechargeable nickel-cadmium (NiCAD) battery which is used by
the alarms in the event of a power failure.
•Refer to the BiPAP Vision Clinical Manual for a complete list of operational Warnings, Cautions,
and Notes.
Additional WARNINGS, CAUTIONS, and NOTES are located throughout this manual.

BiPAP Vision Service Manual
Chapter 3: Description and Theory of Operation
3-1
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Chapter 3: Description and Theory of
Operation
3.1 BiPAP Vision Ventilatory Support System...................................... 3-2
3.2 Power Supply Subsystem (PSS).................................................... 3-5
3.3 Main Control (MC)......................................................................... 3-8
3.4 Pressure Control (PC) .................................................................... 3-9
3.5 Display Control (DC) ....................................................................3-11
3.6 Airflow Module (AFM) ................................................................ 3-14
3.7 Oxygen Module (OM) .................................................................. 3-16
3.8 Description of Ventilator Modes .................................................. 3-17
3.9 Nurse Call / Remote Alarm ........................................................... 3-19
3.10 Patient DisconnectAlarm ............................................................. 3-21

BiPAP Vision Service Manual
Chapter 3: Description and Theory of Operation
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Chapter 3: Description and Theory of Operation
3.1 BiPAP Vision Ventilatory Support System
The BiPAP Vision is a microprocessor-controlled, positive pressure ventilatory assist system. The system’s integral
air intake filter draws in ambient air which is then pressurized by the system’s centrifugal blower assembly. The In-
Line Flow Restrictor (ILFR) valve and Pressure Regulation Valve (PRV), which are both located in the blower
discharge airway, regulate total flow and pressure at the blower discharge system. An oxygen module can be
installed to add a controlled source of supplemental oxygen, up to 100%, to the patient.
The Pressure Control (PC) board continuously monitors the readings from the Airflow Module (AFM) of total gas
flow, temperature, generated pressure, and patient circuit pressure to ensure prescribed therapy to the patient. The
PC board transmits process data to the Main Control (MC) board which then provides overall control of the BiPAP
Vision, including conveying instructions to the PC board regarding required valve stem position and blower speed.
The unique design and operation of the ventilator makes it especially suited for mask applications. Designed with
the BiPAP Auto-Trak SensitivityTM feature that automatically adjusts to changing circuit conditions, the ventilator
is capable of ensuring optimum patient-ventilator synchronicity despite changes in breathing patterns and circuit
leaks. (Refer to the BiPAP Vision Clinical Manual.)
A liquid crystal display (LCD) screen is mounted on the front enclosure of the BiPAP Vision. The LCD and the
Display Control (DC) board provide the primary user interface with the ventilator, including the visual presentation
of data, control features, and visual and audible presentation of alarm conditions. The user interacts with the
ventilator through the touch pad and rotation of the rotary encoder while observing the results of this input on the
display. The information provided on the display varies depending on the state of the ventilator and / or the
operations being performed.
The BiPAP Vision incorporates a number of safety features and self-diagnostic systems. System internal functions
are checked automatically at start-up, and periodically throughout normal operation. An audible and visual alarm
announces failures of principal subsystems. Integrated patient alarms are also provided and are announced on a
visual message display area as well as with an audible tone.
The following sections of this chapter describe in more detail the major subsystems and components that make up
the BiPAP Vision and its basic theory of operation.

BiPAP Vision Service Manual
Chapter 3: Description and Theory of Operation
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Function
PSS The Power Supply Subsystem (PSS) provides DC power to the BiPAP Vision
from an AC source.
MC The Main Control (MC) board or Main Control Subsystem (MCS) performs all control,
or data acquisition, and calculations required for the user-selected parameters. In addition,
MCS the MC performs the start-up test and reports all errors.
PC The Pressure Control (PC) board or Pressure Airflow Subsystem (PAS) controls the blower
or and valves to generate and regulate the system pressure. The PAS senses the outlet
PAS pressure and the patient pressure and regulates the outlet pressure to the patient circuit.
DC Through the touch pad, the Display Control (DC) board or Display/Control
or Subsystem (D/CS) evaluates user inputs and passes valid parameters to the MC. The DC
D/CS receives display data from the MC. The DC also has its own internal functions; the
results of which are reported to the MC.
AFM The Airflow Module (AFM), including the mass airflow sensor in the airstream,
provides an airflow measurement interface to the PC, allowing the PC to
measure total flow, temperature, and system pressure.
ILFR The In-Line Flow Restrictor (ILFR) valve assembly regulates the total flow
from the blower discharge.
PRV The Pressure Regulation Valve (PRV) assembly is opened during exhalation to
allow the patient flow to be exhausted.
OM The Oxygen Module (OM) subassembly regulates and proportions the oxygen released
into the air from the blower according to the oxygen concentration level set on the
parameters screen.
BiPAP Vision Ventilatory Support System (Continued)
Subsystem

BiPAP Vision Service Manual
Chapter 3: Description and Theory of Operation
3-4
1015010
* For S/N 106001 and greater
BiPAP Vision Ventilatory Support System (Continued)
BiPAP Vision Block Diagram
Figure 3-1
BiPAP Vision Block Diagram
*
*
**

BiPAP Vision Service Manual
Chapter 3: Description and Theory of Operation
3-5
1015010
Pneumatics Block Diagram

BiPAP Vision Service Manual
Chapter 3: Description and Theory of Operation
3-6
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3.2 Power Supply Subsystem (PSS)
The PSS supplies the Main Control (MC), Pressure Control (PC), and the Display Control (DC) with the proper DC
supply voltage. Safety features designed into the circuitry include an overvoltage disconnect, low voltage supply
detect, and line loss detect. Other features include “power-on” indicator voltage, circulation fan power, and an On/
Off switch connection.
Figure 3-2
PSS Block Diagram

BiPAP Vision Service Manual
Chapter 3: Description and Theory of Operation
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3.2.1 Input Range
The BiPAP Vision can operate with an AC input of 100, 120, 230, or 240 VAC (±10%) depending on the model.
3.2.2 DC Supply
The output DC supply is fused at 30 amps and delivers between 20.6 VDC and 35 VDC with a maximum ripple of
1 vpp (peak-to-peak voltage) to the MC, PC, and DC.
3.2.3 Overvoltage Disconnect
The overvoltage disconnect is used to remove the DC supply output when it exceeds 36 VDC and reconnects it
when the level returns to an acceptable value.
3.2.4 AC Fail
The MC module monitors the level of DC supply voltage and the AC voltage output from the transformer supply
winding to determine if an AC fail condition exists.
Low DC supply detect – If the DC supply voltage drops to 19.38 VDC or lower (nominal), an AC fail condition will
be triggered.
Line loss detect – The AC voltage output from the transformer supply winding is monitored for a loss-of-cycle
condition. Both legs of the winding are input to the monitoring circuitry. Whenever AC is lost, the AC fail signal is
activated.
3.2.5 Outputs
The PSS module also includes the following:
a. Front panel “power-on” indicator voltage (J5)
b. Circulation fan power (J4)
c. On / Off switch (part of J2)
d. Circulation fan current sense information to (J12) on the PC subsystem.
Power Supply Subsystem (PSS) (Continued)

BiPAP Vision Service Manual
Chapter 3: Description and Theory of Operation
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3.3 Main Control Subsystem (MC)
The MC is microcontroller-based and provides overall system control and supervision by monitoring the activity of
all the other system modules and providing commands to these modules based on user and system input. The MC
also acts as the bus controller for all subsystem communications using the Intermodule Communications Bus (ICB).
Figure 3-3
MC Block Diagram
* For S/N units >106K
Nurse Call /
Remote Alarm *
J5
J6
4
DCS RX / TX
PAS RX / TX
*

BiPAP Vision Service Manual
Chapter 3: Description and Theory of Operation
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3.4 Pressure Control Subsystem (PC)
The PC functions through a microcontroller to:
a. Communicate with the Main Controller Subsystem (MC)
b. Communicate to a terminal / PC for diagnostics
c. Acquire sensor data through an Analog-to-Digital Converters (ADC, A / D)
d. Control valves and the blower motor through a Digital-to-Analog Converter (DAC)
e. Respond to or invoke an error signal
Figure 3-4
PC Block Diagram
* For Units Serial Number <106K
PC
J15*
or
*
*
*
*