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CPAP System
CPAP System
Service Manual
REMstar LX and REMstar Plus LX CPAP Systems are the subject of U.S. patent #5239995 and other pending U.S. and foreign patents. Great Performers, REMstar LX and REMstar Plus LX are trademarks of Respironics, Inc.
Copyright © 1999 Respironics, Inc. All rights reserved.
CPAP REMstar LX and REMstar Plus LX CPAP Systems Service Manual
Limited Warranty
Respironics warrants that the REMstar LX and REMstar Plus LX CPAP Systems shall be free from defects of workmanship and materials and will perform in accordance with the product specifications for a period of one year from the date of sale by Respironics. If the product fails to perform in accordance with the product specifications, Respironics will repair or replace--at its option--the defective material or part. Respironics will pay customary freight charges from Respironics to the dealer location only. This warranty does not cover damage caused by accident, misuse, abuse, alteration, and other defects not related to materials or workmanship. Respironics disclaims all liability for economic loss, loss of profits, overhead, or consequential damages which may be claimed to arise from any sale or use of this product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty is given in lieu of all other express warranties. In addition, any implied warranty, including any warranty of merchantability or fitness for the particular purpose, is limited to one year. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. To exercise your rights under this warranty, contact your local authorized Respironics dealer or contact Respironics at:
Visit Respironics Home Page on the World Wide Web at: www.respironics.com CPAP REMstar LX and REMstar Plus LX CPAP Systems Service Manual
Table of Contents
Table of Contents
Overview:
2.2 Cautions ....................................................... 2-5 REMstar LX and 2.3 Notes ............................................................ 2-5 REMstar Plus LX CPAP Systems Service Chapter 3: Specifications, Features, Manual ............................. O-1 Description, and Theory of Operation ........ 3-1 Introduction ...................... 1-1 3.1 3.2 3.3 3.4 3.5
Chapter 1:
1.1 1.2 1.3
REMstar LX and REMstar Plus LX CPAP Systems Overview ....................................... 1-3 Service Notice ............................................. 1-4 Technical Support Statement ....................... 1-4
Overview ..................................................... 3-3 Specifications .............................................. 3-4 System Features ........................................... 3-6 Functional Description ................................ 3-7 Theory of Operation .................................... 3-9
3.5.1 Key Pad & Time Meter ................................ 3-9 3.5.2 Main Printed Circuit Assembly (Main PCA) ................................................. 3-9 3.5.3 Power Supply Printed Circuit Assembly (Power Supply PCA) .................. 3-9
Chapter 2:
2.1
Warnings, Cautions, and Notes .......................... 2-1
3.6
Warnings ...................................................... 2-3
2.1.1 2.1.2 2.1.3 2.1.4 Safety ........................................................... 2-3 Operational .................................................. 2-3 Service ......................................................... 2-4 Cleaning ....................................................... 2-4
Block Diagram .......................................... 3-10
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Table of Contents
Table of Contents (Continued)
Chapter 4:
4.1 4.2
5.3 System Setup Procedures ........................ 4-1
Overview ..................................................... 4-3 5.4 System Setup ............................................... 4-3
4.2.1 4.2.2 4.2.3 4.2.4 Self-Diagnostic Test..................................... 4-4 Setting the Altitude ...................................... 4-4 Setting the Ramp ....................................... 4-5 5.5 Setting the Pressure ..................................... 4-5
Recording the Total Operating Time (REMstar Plus LX Only) ............................. 5-3 Cleaning / Replacing the Intake Filters ................................................ 5-4
5.4.1 Removing, Cleaning, and Replacing the Filters .................................... 5-4
4.3
Required, Alternate, and Optional Circuit Accessories ...................................... 4-6
4.3.1 Required Accessories ................................... 4-6 4.3.2 Alternate and Optional Circuit Accessories .................................................. 4-7 4.3.3 DC Power Accessories ................................. 4-8 4.3.4 Adding a Humidifier .................................... 4-9 4.3.5 Adding Oxygen to the System ..................... 4-9
REMstar LX and REMstar Plus LX CPAP Systems Preventive Maintenance Schedule ...................................................... 5-5
5.5.1 REMstar LX and REMstar Plus LX Preventive Maintenance Schedule (Factory Recommended) ............................. 5-6
Chapter 6:
6.1 6.2 6.3
Troubleshooting and Diagnostics ........................ 6-1
Chapter 5:
5.1 5.2
Routine Maintenance ..................... 5-1
Overview ..................................................... 6-3 Troubleshooting Flow Chart ........................ 6-4 Troubleshooting Table ................................. 6-5
Overview ..................................................... 5-3 Cleaning the System .................................... 5-3
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Table of Contents (Continued)
Chapter 7:
7.1 7.2 7.3 7.4
Repair & Chapter 8: Testing ............................... 8-1 Replacement ..................... 7-1 8.1 Testing Process ............................................ 8-3
REMstar LX and REMstar Plus LX System Final Test ..................................................... 8-3 Run-in Test .................................................. 8-6 Post Testing Pressure Setup (10.0 cm H2O) ............................................. 8-7 REMstar LX and REMstar Plus LX System Final Test Data Sheet ................................... 8-8
Overview ..................................................... 7-3 8.2
7.1.1 REMstar LX and REMstar Plus LX CPAP Systems Exploded View .............................. 7-4 8.3
REMstar LX and REMstar Plus LX CPAP 8.4 Systems Repair Kits .................................... 7-5 Warnings and Cautions ................................ 7-9 8.5 Replacement Instructions ............................ 7-9
7.4.1 7.4.2 7.4.3 7.4.4 7.4.5 7.4.6 7.4.7 7.4.8
7.4.9
Bottom Strip Replacement ........................ 7-12 Bottom Enclosure Replacement ................ 7-14 Appendix A: Tools and Equipment ...... A-1 Top Enclosure Replacement ...................... 7-16 A.1 Service Tools and Supplies ......................... A-3 Main Printed Circuit Assembly (Main PCA) Replacement ......................... 7-20 A.2 Acceptable Test Equipment ........................ A-4 Key Pad Replacement ................................ 7-23 A.2.1 Digital Manometer ...................................... A-4 Outlet Port Replacement............................ 7-26 A.2.2 Watt Meter .................................................. A-4 Blower Assembly Replacement ................. 7-29 A.2.3 Digital Multimeter ...................................... A-5 Power Supply Printed Circuit A.2.4 Regulated DC Power Assembly (Power Supply PCA) Supply (optional) ........................................ A-5 Replacement .............................................. 7-32 A.2.5 Battery (optional, for testing only) ............. A-5 Enclosure Insert Replacement ................... 7-35
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Table of Contents (Continued)
Appendix B: Schematics ..........................B-1
B.1 B.2 B.4 Schematic Statement .................................. B-3 REMstar LX Main Printed Circuit Assembly (PCA)......................................... B-4 Power Supply Printed Circuit Assembly (PCA)......................................... B-8
Index ........................................................... I-1
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Overview
Overview:
Warranty Table of Contents Chapter 1: Chapter 2: Chapter 3: Chapter 4: Chapter 5: Chapter 6: Chapter 7: Introduction
REMstar LX and REMstar Plus LX CPAP Systems Service Manual
Details the Respironics warranty. Lists the chapters included in this manual. Introduces the REMstar LX and REMstar Plus LX CPAP Systems. Lists the Warnings, Cautions, and Notes. Describes the theory of operation for the units, including basic operations of the subsystems. Details system setup, including instructions on required, alternate, and optional patient accessories. Provides cleaning and routine maintenance instructions. Provides a troubleshooting flow chart and a troubleshooting table. Describes detailed procedures of removing and installing all major components within the units, including graphics and illustrations for visual identification. Includes the System Final Test, Run-in Test, Post Testing Pressure Setup, and Data Sheet. Details the necessary tools and test equipment required for servicing.
Warnings, Cautions, and Notes Specifications, Features, Description and Theory of Operation System Setup Procedures Routine Maintenance Troubleshooting and Diagnostics Repair & Replacement
Chapter 8: Appendix A:
Testing Tools and Equipment
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Overview
Overview (Continued)
Appendix B: Schematics NOTE: These are proprietary and are to be used for reference only. Index Item location guide. Provides Printed Circuit Assembly (PCA) schematics.
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Introduction Chapter 1: Introduction
Chapter 1:
Introduction
1.1 REMstar LX and REMstar Plus LX CPAP Systems Overview ......................................... 1-3 1.2 Service Notice ............................................... 1-4 1.3 Technical Support Statement......................... 1-4
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Introduction Chapter 1: Introduction
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Introduction Chapter 1: Introduction
Chapter 1: Introduction
1.1 REMstar LX and REMstar Plus LX CPAP
Systems Overview
The REMstar LX and REMstar Plus LX CPAP Systems (REMstar LX and REMstar Plus LX), shown in Figure 1-1, are microprocessor-controlled devices that deliver Continuous Positive Airway Pressure (CPAP) therapy in one mode for the treatment of adult Obstructive Sleep Apnea (OSA) only. The CPAP mode provides a constant level of positive pressure throughout the breathing cycle to pneumatically splint the airway open. The units incorporate a key pad with two User buttons, a Light-Emitting Diode (LED) signal light, a time meter (REMstar Plus LX only), and a 2digit LED display. The units may be operated using either AC (115 230 VAC) or DC (12 VDC) power. Figure 1-1 REMstar LX and REMstar Plus LX CPAP Systems
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Introduction Chapter 1: Introduction
1.2 Service Notice
This service manual was prepared by Respironics primarily for use by technicians to service the REMstar LX and REMstar Plus LX Systems. The individuals using this manual to service the REMstar LX and REMstar Plus LX Systems should have prior training or experience servicing ventilatory devices.
1.3 Technical Support Statement
Respironics is committed to customer satisfaction and may be contacted with any questions or for technical support. For technical assistance or replacement part ordering information contact your nearest Respironics Customer Satisfaction Center (CSC).
U.S. and Canada Phone: Fax: International Phone: Fax: 1-412-731-2100 1-412-473-5012 1-800-669-9234 Available from your nearest CSC
Visit Respironics Home Page on the World Wide Web at:
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Warnings, Chapter 2: Warnings, Cautions, and Notes
Chapter 2:
Warnings, Cautions, and Notes
2.1 Warnings ....................................................... 2-3 2.2 Cautions ........................................................ 2-5 2.3 Notes ............................................................. 2-5
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Warnings, Chapter 2: Warnings, Cautions, and Notes
Chapter 2: Warnings, Cautions, and Notes
WARNING: Indicates the possibility of injury to the patient, operator, or technician. CAUTION: NOTE: Indicates the possibility of damage to the devices. Places emphasis on an operating characteristic.
2.1.2 Operational
· This warning applies to most Continuous Positive Airway Pressure (CPAP) devices. At low CPAP pressures, the air flow through the exhalation port may not be enough to clear all of the exhaled gas (CO2) from the mask. You may breathe in some of the air that you have exhaled. Under certain conditions, the temperature of the air flow from these devices can be as much as 18°F (10°C) higher than the air temperature in the room. Caution should be exercised if the room temperature is warmer than 90°F (32°C). If oxygen is used with these devices, the oxygen flow must be turned off when the devices are turned off. If the air flow is turned off and the oxygen flow is left on, oxygen may accumulate in the REMstar LX and REMstar Plus LX CPAP Systems enclosure and may create a risk of fire. This warning applies to most types of CPAP devices. When supplemental oxygen is used at a fixed flow rate, inhaled oxygen concentrations will vary depending on pressure settings, patient breathing patterns, mask selection, and leak rate. Oxygen supports combustion. Do not use oxygen in the presence of open flames, cigarette smoke, electrical spark, or other sources of ignition.
·
2.1 WARNINGS
2.1.1 Safety
· · · These devices are intended for adult use only. These devices are not intended for life support or life sustaining applications. The instructions in this manual are not intended to supersede established medical protocols. ·
·
·
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Warnings, Chapter 2: Warnings, Cautions, and Notes
Warnings (Continued)
· These devices are not suitable for use in the presence of a flammable anesthetic mixture with air or with oxygen or nitrous oxide. In situations where risk of contamination between the user and the device is high (e.g.: sleep lab devices; rental devices; users with respiratory infections), a lowresistance, main flow bacteria filter should be placed inline between these devices and the circuit. Most CPAP devices have the potential to induce rebreathing of exhaled air. To reduce this potential, use only Respironics circuit accessories, do not wear the mask and headgear for more than a few minutes while the units are not operating, and do not block or try to seal the vent holes in the exhalation port. · High voltages are present inside these devices. To avoid electrical shock, disconnect the electrical supply before attempting any repairs on the devices.
·
2.1.4 Cleaning
· To avoid electrical shock, disconnect the electrical supply before cleaning the units. DO NOT immerse these devices into any fluids.
·
2.1.3 Service
· Electronic components used in these devices are subject to damage from static electricity. Repairs made to these devices must be performed only in an antistatic, ElectroStatic Discharge (ESD)-protected environment. To assure the safety of the service technician and the specified performance of the devices, Respironics recommends that only technicians having prior training or experience servicing ventilatory devices perform any repairs or adjustments to the REMstar LX and REMstar Plus LX.
·
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Warnings, Chapter 2: Warnings, Cautions, and Notes
2.2 CAUTIONS
· · Federal law (U.S.) restricts these devices to sale by, or on the order of, a physician. Care should be taken to avoid exposure of the REMstar LX and REMstar Plus LX to temperatures at or near the extremes of those specified in Chapter 3. If exposure to such temperatures has occurred, the devices should be allowed to return to room temperature before being turned on. Always use both a pollen filter (RI P/N 622018) and an ultra-fine filter (RI P/N 622017) when the REMstar LX and REMstar Plus LX are in use. Never place liquids on or near the REMstar LX and REMstar Plus LX. Discontinue using these devices if any of the parts are damaged. Replace any damaged parts before continuing use. The information in this manual is provided for service personnel reference and is not intended for system setup or use. System setup should be performed by appropriate personnel using Home Care Dealer Instructions.
2.3 NOTES
· Refer to the REMstar LX and REMstar Plus LX User's Manual for product use additional warnings, cautions, and notes.
Additional WARNINGS, CAUTIONS, and NOTES are located throughout this manual.
·
· ·
·
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Features, Chapter 3: Specifications, Features, Description, and Theory of Operation
Chapter 3: Specifications, Features, Description, and Theory of Operation
3.1 Overview ....................................................... 3-3 3.2 Specifications ................................................ 3-4 3.3 System Features ............................................ 3-6 3.4 Functional Description .................................. 3-7 3.5 Theory of Operation ...................................... 3-9 3.6 Block Diagram ............................................ 3-10
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Features, Chapter 3: Specifications, Features, Description, and Theory of Operation
Chapter 3: Specifications, Features, Description, and Theory of Operation
3.1 Overview
This chapter describes the REMstar LX and REMstar Plus LX CPAP Systems (REMstar LX and REMstar Plus LX) specifications and system features, and provides a functional description and theory of operation of the units.
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Features, Chapter 3: Specifications, Features, Description, and Theory of Operation
3.2 Specifications
ENVIRONMENTAL:
Operating Temperature ............................ Storage Temperature ................................ Humidity .................................................. Outlet Temperature Rise ......................... 41 104°F (5 40°C) -4 140°F (-20 60°C) 15 95% non-condensing Shall not exceed 122°F (50°C) when operating at a maximum ambient temperature of 104°F (40°C).
FUSES:
Fuses ......................................................... 0.8 amp or 800 ma time delay (100 120 VAC); 0.315 or 315 ma time delay (230 240 VAC) 5 mm × 20 mm
Physical Fuse Size ...................................
PHYSICAL:
Electrical Safety ....................................... IEC 601-1, general safety requirement for medical devices 10.00" (L) × 5.50" (W) × 4.75" (H) (25 × 14 × 12 cm) 3.5 lbs (1.6 kg)
NOTE:
The outlet temperature rise can be as much as 18°F (10°C) higher than room temperature measured at the end of a 6 ft. (1.83 m) tube.
76.7 102 kPascals (Storage: 50 102 kPascals)
Dimensions ...............................................
Weight ...................................................... Atmospheric Pressure ..............................
ELECTRICAL:
Elevation .................................................. 0 5,000 ft. and greater with three selected ranges available. No specification is given because various test instruments, test procedures, and unit operating conditions produce varying results. Verify the pressure setting via a manometer for elevation settings over 5,000 ft. AC Input Voltage ..................................... 100 120 VAC; 230 240 VAC; 50 60 Hz 11 17 VDC T 800 ma at 115 VAC T 315 ma at 230 VAC 3.0 A maximum, time delay, type MDL 80 VA maximum
Noise Level ..............................................
DC Input Voltage ..................................... AC Current Consumption ........................
DC Current Consumption ........................
Power Consumption .................................
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Features, Chapter 3: Specifications, Features, Description, and Theory of Operation
Specifications (Continued)
Class ......................................................... Type .......................................................... Class II Type BF IEC 801-4 ................................................. Electrically fast transients for industrial process measurement and control equipment. Limits and methods of measurement of electromagnetic disturbance characteristics of industrial, scientific, and medical (ISM) equipment.
FUNCTIONS:
Modes ....................................................... CPAP
CISPR 11 ..................................................
EMC NORMATIVE DOCUMENTS: This product complies with the requirements found in the following documents:
IEC 601-1-2 .............................................. Medical electrical equipment, general requirements for safety, and electromagnetic compatibility. Electrostatic discharge requirements for industrial process measurement and control equipment. Radiated electromagnetic field requirements for industrial process measurement and control equipment.
ALTITUDE COMPENSATION:
Pressure Range ......................................... Settings ..................................................... 4.0 20.0 cm H2O Low (0 2500 ft.; 0 762 m) Mid (Medium) (2501 5000 ft.; 763 1524 m) High (greater than 5,000 ft.)
IEC 801-2 .................................................
IEC 801-3 .................................................
RAMP SETTINGS
Ramp Time .......................................... 5 - 45 minutes Adjustable in 5 minute increments.
TIME METER (REMSTAR PLUS LX ONLY):
Time Meter (LCD) ................................... Total Operation Time
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Features, Chapter 3: Specifications, Features, Description, and Theory of Operation
Specifications (Continued)
3.3 System Features
AC Power Connector ............................... Connect the AC power cord here. Connect the flexible tubing here. This button turns the blower either on or off. Optional DC power connection. The pollen filter screens out normal household dust and pollens. This must be in place at all times when the units are operating. An optional, ultra-fine filter is also included for more complete filtration of very fine particles. The filter cap can be positioned to direct the air flow away from your bedside. Includes User buttons, LED signal light, time meter (REMstar Plus LX only), and 2-digit LED display. The green light signals when the units are ready for use. The light will go out when the air flow is turned on. A flashing light signals that the units need to be serviced. Air Outlet Port .........................................
PRESSURE:
AC Operation ........................................... DC Operation ........................................... CPAP Mode ............................................. Resolution ................................................ Accuracy .................................................. 4.0 20.0 cm H2O Blower On / Off Button ........................... 4.0 20.0 cm H2O 4.0 20.0 cm H2O 0.5 cm H2O +1.3 cm H2O or 15% of the indicated control setting (whichever is greater) This tolerance assumes system setup similar to maximum pressure test. +1.0 cm H2O over 8 hours Key Pad .................................................... DC Power Connector ............................... Filter Cap & Filters ..................................
Setting Stability .......................................
LED Signal Light .....................................
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Features, Chapter 3: Specifications, Features, Description, and Theory of Operation
System Features (Continued)
3.4 Functional Description
IEC 320 Style. This button initiates a ramp cycle which incrementally and automatically increases the pressure. Records hours of operation. Displays pressure and altitude setting. These buttons (Blower On / Off and Ramp) can be used in combination to enter the Dealer mode functions.
Power Cord ............................................... Ramp Button ............................................
The REMstar LX and REMstar Plus LX are microprocessor-controlled Continuous Positive Airway Pressure (CPAP) devices that produce positive pressure. The units operate in the CPAP mode. This mode delivers continuous positive airway pressure, maintaining a constant level of pressure throughout the breathing cycle. CPAP mode pressure range in AC and DC operation: 4.0 20.0 cm H2O. Integral to the generation of air flow is the blower assembly. Ambient air is drawn through the air intake filter, and pressurized by the energized blower. Ultimately, therapeutic pressure is provided to the patient via the patient circuit. The microprocessor regulates the motor speed, which in turn adjusts and controls the pressure. The key pad, which includes two User buttons, a Light-Emitting Diode (LED) signal light, a time meter (REMstar Plus only), and a 2-digit LED display, is the primary means by which the patient therapy is controlled. Patients have limited access to unit parameters. The unit may be powered from either AC (100 120 VAC; 230 240 VAC) or from DC power (12 VDC). AC power enters the unit via an IEC-320 style AC inlet and appropriate power cord. A DC power connector enables the patient to use the system when AC voltage is not accessible. The two system filters, the pollen and the ultra-fine, ensure optimum operation for the user. An air outlet port allows for connection to the patient circuit.
Time Meter ............................................... 2-digit LED Display ................................
User Buttons .............................................
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Features, Chapter 3: Specifications, Features, Description, and Theory of Operation
Functional Description (Continued)
The patient circuit is made up of the flexible tubing, outlet swivel with pressure tubing, exhalation port, and nasal mask. The units apply CPAP to the patient's upper airway to keep the airway open during sleep. Air flow generated from the units is directed to the patient via a mask and flexible tubing that connects to the air outlet port of the units. The Ramp feature lets the user reduce the pressure from the REMstar LX and REMstar Plus LX so that the patient can fall asleep at a lower, more comfortable pressure at any time or as many times as needed during the night. WARNING: The units are intended to deliver CPAP therapy only. Air Flow Turned On Therapy Pressure Ramp Button Pressed They are not intended for life support or life sustaining applications.
The following sections describe the major components of the REMstar LX and the REMstar Plus LX and their basic theory of operation.
Ramp Settings
The minimum ramp pressure is factory set at 4 cm H2O and cannot be changed. The ramp time can be set from 0 to 45 minutes (5 minute increments). The first time the ramp button is pressed, the pressure will reduce to 4 cm H2O and then increase in a linear fashion over the set time period until the pressure setting is reached. After the first activation, each subsequent ramp will be for one-half of the set ramp time. The blower must be turned off with the Pressure On/Off button and then back again to reset the ramp to the full time. a. To view the ramp time setting, enter the system set-up by simultaneously holding the ramp and pressure on/off buttons down while plugging the power cord into an electrical outlet. Release the button when the unit turns on. b. The airflow will automaticaly turn on and the display screen will show the current elevation setting. c. Press and release the on/off button to view the ramp setting.
Minimum Ramp Pressure
0 cm H2O Minutes
Ramp Time
Figure 3-1 Ramp Operation
d. To change the ramp time setting, press and release the ramp button until the correct setting is displayed.
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Features, Chapter 3: Specifications, Features, Description, and Theory of Operation
3.5 Theory of Operation
3.5.1 Key Pad & Time Meter
The key pad consists of two User buttons (Ramp button, Blower On / Off button), a LED signal light, a time meter (REMstar Plus LX only), and a 2-digit LED display. The Blower On / Off button activates and deactivates the pressure. The range of pressure is 4.0 to 20.0 cm H2O with AC and DC operation. The Ramp button initiates a ramp cycle which incrementally and automatically increases the pressure. The ramp begins at the minimum ramp pressure setting, and over the specified time period, increases until the therapeutic pressure is reached. Ramp time is dealer adjustable from 0 - 45 minute in 5 minute increments. The LED signal light indicates power and blower On / Off status. The time meter indicates the total number of hours the unit has been in use. Three altitude compensation levels (low, medium, and high) may also be set. The 2-digit LED display indicates the altitude and pressure setting.
coils that are connected in the "Y" configuration and serve as its stator coils. The stator coils are electrically switched or commutated by drive circuits with the power FET transistors. Proper timing and sequencing of the stator coil switching is provided by the motor microcontroller which senses the motor's shaft position by monitoring the back-EMF voltage in one of the motor's stator coils. The main microcontroller also sets the motor speed (and consequently the output pressure) by varying the voltage which is delivered to the motor. It does this by controlling the pulse duty cycle of a switching power supply (boost mode) on the Main PCA. The time meter PCA does not require electrical power from an on-board battery to retain time.
3.5.3 Power Supply Printed Circuit Assembly (Power Supply PCA)
The REMstar LX and REMstar Plus LX is operational over the input voltage ranges of 100 120 VAC @50 60 Hz, 230 240 VAC @50 60 Hz, or 11 17 VDC. A patient accessible voltage selector switch is provided for 115 and 230 volt selection. A DC jack is provided for 11 17 VDC operation.
3.5.2 Main Printed Circuit Assembly (Main PCA)
The Main PCA is the control center of the units. The Main PCA utilizes two microcontroller chips which read from and write to various I/O devices (key pad, LED, motor control circuitry, etc.). With all of this information, the main microcontroller makes appropriate decisions so that the blower motor is properly controlled to deliver the desired CPAP therapy in a safe and reliable manner. The main microcontroller and other interface circuitry provide closed loop control of the blower motor's speed. The blower motor is a threephase brushless DC motor with a permanent magnet rotor and stationary
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Features, Chapter 3: Specifications, Features, Description, and Theory of Operation
3.6 Block Diagram
Ambient Air Air Filter Blower Assembly To Patient Circuit
Mains 115 / 230 Main Micro Controller
Motor Micro Controller
LED Display
REMstar LX REMstar Plus LX Main PC Board
Time Meter
(Plus Model Only)
EE Prom
Key Pad
REMstar LX REMstar Plus LX Power Supply PCA
REMstar LX REMstar Plus LX Main PCA Board
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Procedur ocedures Chapter 4: System Setup Procedures
Chapter 4:
System Setup Procedures
4.1 Overview ....................................................... 4-3 4.2 System Setup ................................................. 4-3 4.3 Required, Alternate, and Optional Circuit Accessories........................................ 4-6
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Procedur ocedures Chapter 4: System Setup Procedures
Chapter 4: System Setup Procedures
4.1 Overview
This section provides an overview of the system setup including detailed required, alternate, and optional circuit accessories. See Chapter 5 Routine Maintenance, for filter and filter cap installation instructions CAUTION: If the REMstar LX and REMstar Plus LX CPAP Systems (REMstar LX and REMstar Plus LX) have been exposed to either very hot or very cold temperatures, allow them to adjust to room temperature (approximately two hours) before beginning setup.
4.2 System Setup (Dealer Mode)
Step 1 If installed, remove the protective cap from the air outlet. Install the test orifice (RI P/N 622032) onto the unit outlet. Plug the male end of the AC power cord into an electrical outlet. Simultaneously, press the two User buttons and plug the female end of the AC power cord into the AC inlet on the back of the unit. Hold the two User buttons down to enter dealer mode. Figure 4-1 Key Pad Features
Step 2
Step 3
CPAP System
LED Signal Light 2-Digit LED Display (Pressure, Ramp Length and Altitude Read-out) Ramp Button
Time Meter (REMstar Plus LX only)
R
R
Blower On / Off Button
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System Setup (Continued)
NOTE: DO NOT turn the airflow on until a test adapter is connected. (RI P/N 622032)
4.2.2 Setting the Altitude
The altitude may be set in the either Dealer mode or User mode. While holding down the two User buttons or the key pad, plug the AC power cord into the unit. The altitude setting will be displayed on the 2-digit LED. To ensure proper therapy, this setting needs to be accurate for the patient's current location. The altitude displays are:
4.2.1 Self-Diagnostic Test
After the unit is plugged into an electrical outlet, it will perform a SelfDiagnostic Test. The blower will turn on and the 2- digit LED display will indicate the altitude setting.
LOW
0 2,500 ft. (0 762 m)
MID
2,501 5,000 ft. (763 1,524 m)
HIGH
greater than 5,000 ft.
If the correct setting is displayed, press the left User button. To change the altitude setting, press the right User button until the correct setting is displayed. NOTE: Altitudes over 5,000 ft. (1,524 m) may affect the accuracy of the pressure. Verify the pressure settings with a manometer.
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System Setup (Continued)
4.2.3 Setting the Ramp Time
The minimum ramp pressure is factory set at 4 cm H2O and cannot be changed. The ramp time can be set from 0 to 45 minutes (5 minute increments). The first time the ramp button is pressed, the pressure will reduce to 4 cm H2O and then increase in a linear fashion over the set time period until the pressure setting is reached. After the first activation, each subsequent ramp will be for one-half of the set ramp time. The blower must be turned off with the Pressure On/Off button and then back again to reset the ramp to the full time. a. To view the ramp time setting, enter the system set-up by simultaneously holding the ramp and pressure on/off buttons down while plugging the power cord into an electrical outlet. Release the button when the unit turns on. b. The airflow will automaticaly turn on and the display screen will show the current elevation setting. c. Press and release the on/off button to view the ramp setting. d. To change the ramp time setting, press and release the ramp button until the correct setting is displayed. d. b. c. · · · · · 6 ft. Smooth-Bor tubing to the outlet port on the unit. Whisper Swivel II to the 6 ft. Smooth-Bor tubing. Test orifice 60 lpm @ 14.4 cm (RI P / N 622032) to the Whisper Swivel II. Manometer and pressure tubing to test orifice. Occlude test orifice.
Ensure the blower is off. Unplug the AC power cord from the unit. The green LED will go out. While holding down the two User buttons on the key pad, plug the AC power cord into the unit. The same displays used for the Minimum Pressure Test (see Section 8.2) should be visible. Verify the following: · the blower is running in the unit; and the proper altitude setting is indicated on the display.
4.2.4 Setting the Pressure
The pressure may set without the use of a manometer. The manometer is only needed if pressure accuracy is suspect. If pressure accuracy needs checked follow steps a - g. a. Connect the following:
e. f. g.
Press the left User button twice until the Pressure display appears. Press the right User button until "20" appears. Each press of the right User button increments the pressure by 0.5 cm. Press the Blower On / Off button and verify the pressure on the manometer is 20.0 cm H2O (±2.25 cm H2O).
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4.3 Recommended, Alternate, and Recommended, Optional Circuit Accessories
This section addresses the recommended, alternate, and optional circuit accessories that can be used with the REMstar LX and REMstar Plus LX. For additional information, refer to the User's Manual or the Home Care Providers Manual or the literature supplied with the accessory.
Mask
4.3.1 Required Accessories
To use the REMstar LX and REMstar Plus LX Systems, the following accessories are recommended in order to assemble the circuit. WARNING: The REMstar LX and REMstar Plus LX Systems should only be used with the recommended patient circuit identified below. Recommended Patient Circuit · Respironics Nasal Mask & Whisper Swivel® II Exhalation Port (or Respironics mask w/integrated exhalation port such as the Monarch® Mini Mask)
Whisper Swivel II
Flexible Tubing Assembly
Figure 4-2 Unit with Circuit
· Respironics 6 ft. (1.83 m) Flexible Tubing Assembly (reusable or lightweight) · Respironics Headgear or SoftcapTM (not shown)
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Recommended, Alternate, and Optional Circuit Accessories (Continued)
4.3.2 Alternate and Optional Circuit Accessories
The Respironics alternate accessories, listed in Table 4-1, can be used in place of the recommended accessories. The optional accessories can be added to the patient circuit. Refer to Table 4-1 for changes in the pressure / flow characteristics when using these accessories.
Table 4-1, Patient Circuit Accessory Pressure / Flow Characteristics Pressure Drop @ 30 lpm (cm H2O) Recommended Patient Circuit
Nasal Mask (disposable, reusable) GoldSealTM Nasal Mask (reusable) Monarch® Mini Mask Whisper Swivel® II (reusable) 6 ft. (1.83 m) Reusable Flexible Tubing 0.03 0.03 0.20 0.02 0.11 0.09 0.09 0.77 0.08 0.30
Pressure Drop @ 60 lpm (cm H2O)
Alternate Accessories
Spectrum® Disposable Full Face Mask PlateauTM Exhalation Valve (reusable) 6 ft. (1.83 m) Disposable Circuit & Exhalation Port 0.04 0.05 0.20 0.10 0.20 0.34
Optional Accessories
Respironics OasisTM Humidifier 24 in. Reusable Tubing (used with humidifier) 18 in. Disposable Tubing (used with humidifier) 18 in. Reusable Tubing (used with humidifier) King Bacteria Filter (disposable) Comfort Flap® Mask Accessory (reusable) 0.14 0.03 0.00 0.00 0.74 0.00 0.40 0.10 0.00 0.10 1.65 0.00
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Recommended, Alternate, and Optional Circuit Accessories (Continued)
The following graph provides the exhaust / flow characteristics of the exhalation port accessories that can be used with the REMstar LX and REMstar Plus LX Systems. This information may help assess the CO2 rebreathing potential of various circuit configurations at different applied pressures.
Typical Exhaust Flow/Pressure Performance 45
WARNING: Appropriate diagnostic pressures must be determined when alternate or optional accessories are in place. Respironics reusable circuit accessories are washable, but are for single patient use only. They are not intended to be used on multiple patients.
4.3.3 DC Power Accessories
The Respironics DC Power Cord (RI P/N 1000815) can be used to operate the REMstar LX and REMstar Plus LX Systems in a stationary recreational vehicle, boat, truck, or motor home. The Respironics DC Battery Adapter Cable (RI P/N 532209), when used with the Respironics DC Power Cord, enables the REMstar LX and REMstar Plus LX Systems to be operated from a 12 VDC free-standing battery. NOTE: Respironics recommends a 100 amp-hour deep cycle marine battery. A fully charged battery of this size will supply approximately 20 hours of therapy.
40
35
30
Flow (lpm)
25
20
15
10
Whisper Swivel® II Exhalation Port Monarch Mini Mask w / Exhalation Port Plateau Exhalation Valve
The units should not be operated while the vehicle is in motion. CAUTION: Only use the Respironics DC Power Accessories. Use of any other system may cause damage to the REMstar LX and REMstar Plus LX or your vehicle. DC Power is not intended to be used as battery back-up. DO NOT connect the DC Power while the units are operating on AC Power. System damage may occur.
5
0 0 5 10 15 20
Pressure (cm H2O)
CAUTION: Figure 4-3 Typical Exhaust Flow / Pressure Performance
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Recommended, Alternate, and Optional Circuit Accessories (Continued)
4.3.4 Adding a Humidifier
When using a humidifier, always disconnect the humidifier tubing from the REMstar LX and REMstar Plus LX Systems when they are turned off. DO NOT use a room humidifier within 6 ft. (1.83 m) of the units. Moisture can build up in the systems and cause damage. Follow the instructions included with the humidifier. When using a heated humidifier, avoid using a high temperature setting which may cause water to collect in the tubing.
4.3.5 Adding Oxygen to the System
Please note the warnings listed below when using oxygen with the REMstar LX and REMstar Plus LX Systems. WARNING: When using oxygen with the systems, turn the units on before turning the oxygen on. Turn the oxygen off before turning the units off. This will prevent oxygen accumulation in the room. WARNING: Oxygen supports combustion. Do not use oxygen in the presence of open flames, cigarette smoke, electrical spark, or other sources of ignition.
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Chapter 5: Routine Maintenance
Chapter 5:
Routine Maintenance
5.1 Overview ........................................................ 5-3 5.2 Cleaning the System ...................................... 5-3 5.2 Recording the Total Operating Time (REMstar Plus LX Only) ............................... 5-3 5.4 Cleaning / Replacing the Intake Filters .................................................. 5-4 5.5 REMstar LX and REMstar Plus LX CPAP Systems Preventive Maintenance Schedule ......................................................... 5-5
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Chapter 5: Routine Maintenance
Chapter 5: Routine Maintenance
5.1 Overview
This chapter provides guidelines and illustrates the cleaning and maintenance procedures for the REMstar LX and REMstar Plus LX CPAP Systems (REMstar LX and REMstar Plus LX). Before cleaning or performing any routine maintenance, always switch the Blower On / Off button to the Off position and unplug the power cord from the rear of the unit.
5.3 Recording the Total Operating Time (REMstar Plus LX Only)
The total operating time is displayed on the REMstar Plus LX time meter. The time meter is located on the left display and is signified by an hourglass icon. The total operating time is the total number of hours the unit has been in use. This total includes factory testing time.
5.2 Cleaning the System
WARNING: To avoid electrical shock, disconnect the electrical supply before attempting to clean the units. DO NOT immerse the units in water or allow any liquid to enter the cabinet or the filter intake. Step 1 Wipe the outside of the unit with a cloth slightly dampened with water and a mild detergent. Let the unit dry before reconnecting the electrical supply.
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Chapter 5: Routine Maintenance
5.4 Cleaning / Replacing the Intake Filters
The gray pollen filter is a reusable filter that screens out pollens and some household dust. This filter should be cleaned at least once every two weeks under normal usage, or as required, and replaced with a new one every six months. One additional pollen filter is included with the systems. The pollen filter must be in place at all times when the units are operating. The disposable white ultra-fine filter increases filtration of pollens, dust, some tobacco smoke, and small particles. The ultra-fine filter is included with the systems, but is optional and should be used in addition to the pollen filter. The ultra-fine filter should never be used without the pollen filter. Replace the ultra-fine filter after 30 nights of use or sooner if it appears dirty. DO NOT clean the ultra-fine filter. CAUTION: Failure to replace a dirty filter may cause the devices to operate at higher than normal temperatures and damage the devices.
5.4.1 Removing, Cleaning, and Replacing the Filters
Step 1 With the air flow turned off, disconnect the AC or DC power cord from the back of the unit. Remove the filter cap by gently pressing down on the top of the filter cap, then pulling it away from the back of the unit. Remove the pollen filter by gently pulling the edges of the filter. Rinse the filter in a steady stream of running water. Squeeze out the water, and repeat. Allow the pollen filter to air dry on a rack for 8 to 12 hours, or in a clothes dryer for 15 to 20 minutes. If you are using the white ultra-fine filter, remove the ultrafine filter if it appears dirty and discard. Replace with a new filter. Make sure the filter is lying flat. Place the pollen filter over the ultra-fine filter, if used. Install the filter(s) into the filter area in the back of the unit. The pollen filter must be completely dry before use. Never place a wet filter into the device. Respironics recommends that you clean the filter in the morning and alternate using the two pollen filters provided with the systems to ensure enough drying time for the cleaned filter.
Step 2
Step 3
Step 4
Step 5
CAUTION:
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Cleaning / Replacing the Intake Filters (Continued)
Step 6 Install the filter cap. The opening in the filter cap can be installed in either direction.
5.5 REMstar LX and REMstar Plus LX CPAP Systems Preventive Maintenance Schedule
The following Preventive Maintenance Schedule lists the items that must be inspected or tested periodically, or after service is performed. Use the Preventive Maintenance Schedule to record the dates on which the maintenance items are performed. You may photocopy the Preventive Maintenance Schedule for each unit serviced.
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REMstar LX and REMstar Plus LX CPAP Systems Preventive Maintenance Schedule (Continued)
5.5.1 REMstar LX and REMstar Plus LX Preventive Maintenance Schedule (Factory Recommended)
Model No. _____________ Serial No. ______________________ Notification No. _________________________
Maintenance Item
Record hours of operation (REMstar Plus LX only) Replace pollen filter
Verification Reference
Time meter
Service Interval
As desired
Date
Section 5.4.1
Clean every 2 weeks, or as required; Change every 6 months, or as required Replace after 30 nights of use (sooner if it appears dirty)
Replace ultra-fine filter (if used)
Section 5.4.1
Perform Testing Process Cleaning
Section 8.1 Section 5.2
After service is performed As required
Tested by: (Signature in ink) ____________________________ Date: _______________________
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Chapter 6:
Troubleshooting and Diagnostics
6.1 Overview ........................................................ 6-3 6.2 Troubleshooting Flow Chart .......................... 6-4 6.3 Troubleshooting Table .................................... 6-5
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Chapter 6: Troubleshooting and Diagnostics
6.1 Overview
WARNING: Electrical Shock Hazard: Disconnect the electrical supply before repairing the units. CAUTION: Electronic components used in these units are subject to damage by static electricity. Use proper static discharge equipment and grounding precautions when servicing the equipment. Service only at a static-free workstation.
This section contains information necessary to troubleshoot and diagnose problems with the REMstar LX and REMstar Plus LX CPAP Systems. It provides a summary of common system problems as well as a flowchart and table to simplify the troubleshooting process.
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6.2 Troubleshooting Flow Chart
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6.3 Troubleshooting Table
Symptom
Indicator LED or other indicator not working.
Cause
· Key pad · Interface cable loose · Main PCA
Verification
Corrective Action
Check connection between the Check for secure connection key pad ribbon cable and the of ribbon cable connector. Main PCA. · Replace Main PCA Check connection between Main PCA and Power Supply · Replace Power Supply PCA PCA. Check connection between Main PCA and Power Supply PCA. Replace in order until solved: · Main PCA · Power Supply PCA
Time Meter Display is blank or contains erroneous information.
· Main PCA
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Troubleshooting Table (Continued)
Symptom
Intermittent Power Supply Problem An intermittent on / off condition exists, or indicator lights blink sporadically.
Cause
· Power cord, AC inlet, Main PCA, loose connections. · Power Supply PCA.
Verification
Inspect power cord for fraying at cable ends. Inspect all connectors on the PCAs. U2 Pin 14 = +5.00 VDC ± 0.15 VDC
Corrective Action
If power supply DC voltage is not within specifications, replace Power Supply PCA. If power cord or connectors are faulty, replace items as required. If +5vdc supply is not within specifications, replace Main PCA.
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Troubleshooting Table (Continued)
Symptom
Unit Does Not Operate from the 12 VDC Power Source Units blow fuses in the DC cord during DC operation.
Cause
Faulty DC plug, low DC voltage, fuse in DC cord is blown. Power Supply PCA
Verification
Ensure the DC supply is a minimum of 12 VDC. Ensure the DC voltage is stable. Monitor the voltage at the back of the DC connector mounted on the Main PCA. If DC voltage is below 11.5 VDC, replace or recharge DC source. If there is no DC measured at the Power Supply PCA, then check DC adapter cord for continuity. Inspect for any loose screws. Turn unit over and inspect the bottom for missing or damaged bottom strip.
Corrective Action
· If DC cord or source is not at 12 VDC, replace or recharge as required. · If 12 VDC supply is OK, replace Main PCA.
Noise -
Loose screws. Missing or damaged bottom strip on bottom of unit, blower malfunctioning.
· Tighten any loose screws. · If bottom strip is missing, replace bottom strip. · Replace blower.
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Troubleshooting Table (Continued)
Symptom
Odor -
Cause
Airborne residue. Tubing smells new. Units smells new.
Verification
Visually inspect patient tubing for contamination.
Corrective Action
To clear residue build-up from contaminates, replace all subassemblies in the patient air stream (blower, filters, patient circuit).Run unit in a clean environment for a few hours to eliminate new smell. Wash tubing with soap and water. Replace: · Blower · Power Supply PCA Move unit away from external heat source.
Outlet Air Temperature The outlet air temperature is too warm.
Blower, Power Supply PCA. Unit too close to external heat source.
Monitor the outlet air temperature at the end of the six foot tubing. A rise in temperature can be expected. Ensure the unit is not next to any heat source greater than 18°F above room temperature and is not in an enclosed environment.
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Troubleshooting Table (Continued)
Symptom
Pressure Related Problems The outlet pressure does not change or properly adjust. Pressure Offset Static pressure fluctuates -1.0 cm to +2.0 cm H2O. Unit Blower Turns on When Power Cord is Plugged In.
Cause
Main PCA or blower malfunction. The delivered pressure is higher or lower than the set value by more than +2.0 / -1.0 cm H2O. Unit was unplugged with blower running.
Verification
Check blower for internal air leaks. Perform power up process. Check altitude setting.
Corrective Action
· Replace blower, pressure tubing, or Main PCA as required. · Replace blower. · Replace Main PCA. Set the correct altitude
Plug unit in. If blower turns on without pressing the Blower On / Off button, reset the unit.
Turn the blower off and remove the AC power.
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Troubleshooting Table (Continued)
Symptom
Ramp Pressure The pressure does not ramp correctly.
Cause
· Main PCA. · Ramp button not functioning.
Verification
Press the Ramp button and verify that the pressure drops below 5.0 cm H2O. Pressure will increase in a linear fashion over time until the pressure setting is reached. Verify one increase in pressure change in ramp operation.
Corrective Action
· Replace Main PCA · Replace key pad
Pressure Variation The pressure varies around the set value, pressure fluctuates greater than 1.0 cm H2O.
· Internal air leak · Filters dirty · Main PCA, blower · Altitude setting · Air path blocked
Check filters. Perform Testing Process (see Chapter 8).
Verify proper altitude setting. Clean / replace filters. Replace blower. Clear air path. If pressure still drifts, then replace Main PCA.
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Chapter 7: Repair & Replacement
Chapter 7:
Repair & Replacement
7.1 7.2 7.3 7.4
Overview .................................................... 7-3 REMstar LX and REMstar Plus LX CPAP Systems Repair Kits ................................... 7-5 Warnings and Cautions ............................... 7-9 Replacement Instructions ........................... 7-9
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Chapter 7: Repair & Replacement
Chapter 7: Repair & Replacement
7.1 Overview
Figure 7-1 lists the names and identifies the locations of the replaceable components in the REMstar LX and REMstar Plus LX CPAP Systems (REMstar LX and REMstar Plus LX). The illustrations provide a quick reference and overview of the units. Within each replacement section, more detailed support information is provided to illustrate the exact component location and replacement procedure(s).
For technical assistance or replacement part ordering information contact your nearest Respironics Customer Satisfaction Center (CSC).
U.S. and Canada Phone: Fax: International Phone: Fax: 1-412-731-2100 1-412-473-5012 1-800-669-9234 Available from your nearest CSC
Visit Respironics Home Page on the World Wide Web at:
www.respironics.com
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Chapter 7: Repair & Replacement
7.1.1 REMstar LX and REMstar Plus LX CPAP Systems Exploded View
Key Pad Top Enclosure
Main PCA Blower Assembly Outlet Port Not Shown: AC Power Cord Bottom Strip DC Power Cord Filter Cap Fuse Drawer Fuses Pollen Filter Ultra-fine Filter Power Supply PCA
Mounting Plate
Enclosure Insert
NOTE:
The time meter is available with the REMstar Plus LX only.
Bottom Enclosure
Figure 7-1 REMstar LX and REMstar Plus LX CPAP Systems Exploded View
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Chapter 7: Repair & Replacement
7.2 REMstar LX and REMstar Plus LX CPAP Systems Repair Kits
Replacement Part AC Power Cord (U. S. and Canada) AC Power Cord (International) Blower Assembly Includes: · Blower assembly (w / foam baffle) · Blower-to-enclosure insert seal · 6-13 × 1" screw (×6) · Ferrite clamp-on (not used for this repair · Pressure tubing (not used for this repair) Bottom Enclosure (REMstar LX and REMstar Plus LX) Includes: · Bottom enclosure (w / foam baffle and bottom strip) · Warning label · 8-11 × 3/4" screw (×3) Bottom Strip Replacement Part No. 362524 See Note 1 622115 Page No. N.A. N.A. 7-29
1000828 See Note 2
7-14
622122
7-12
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REMstar LX and REMstar LX CPAP Systems Repair Kits (Continued)
Replacement Part DC Power Cord (optional) Enclosure Insert Includes: · Enclosure insert (w / foam baffle) · Blower-to-enclosure insert seal · 6-13 × 1" screw (×6) Filter, Disposable, Ultra-fine (×1) Filter, Reusable, Pollen (×1) Filter Cap (w / foam baffle) Fuse Drawer (REMstar LX and REMstar Plus LX) Fuse Kit, 230240 VAC (REMstar LX and REMstar Plus LX) Fuse Kit, 100-120 VAC (REMstar LX and REMstar Plus LX) Key Pad (REMstar LX)
Replacement Part No. 1001956 622119
Page No. N.A. 7-35
622017 622018 622124 622010 1000709 1000710 1000826
5-3 5-3 N.A. N.A. N.A. N.A. 7-23
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REMstar LX and REMstar LX CPAP Systems Repair Kits (Continued)
Replacement Part Key Pad (REMstar Plus LX) Main Printed Circuit Assembly (Main PCA) (REMstar LX) Includes: · Main PCA · Tinnerman fastener (×2) Main Printed Circuit Assembly (Main PCA) (REMstar Plus LX) Includes: · Main PCA · Tinnerman fastener (×2) Mounting Plate (REMstar LX and REMstar Plus LX) Includes: · Mounting plate · 6-13 × 3/8" screw (×4) O2 Enrichment Port (used for testing) Outlet Port Includes: · Outlet port
Replacement Part No. 1001415 1000830
Page No. 7-23 7-20
1001414
7-20
622252
N.A.
312010 1000827
N.A. 7-26
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REMstar LX and REMstar LX CPAP Systems Repair Kits (Continued)
Replacement Part Power Supply Printed Circuit Assembly (Power Supply PCA) Includes: · Power supply PCA · 6-13 × 3/8" screw (×2) REMstar LX and REMstar Plus LX Service Manual Test Orifice (used for testing) Top Enclosure Includes: · Top enclosure · 8-11 × 3/4" screw (×3) · Tinnerman fastener (×2)
Comments: · · · ·
Replacement Part No. 622265
Page No. 7-32
1001416 622032 1000829
N.A. N.A. 7-16
Illustration is shown on page 7-4. All items have a quantity of one unless otherwise specified. Part replacement procedures are detailed within this chapter. Assorted tubing, cables, and hardware are supplied with each Replacement Kit.
Note 1: Note 2:
Contact Respironics International Customer Service for further AC Power Cord information. Contact Respironics Technical Service Department or a Respironics Customer Satisfaction Center for bottom enclosure ordering information.
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Chapter 7: Repair & Replacement
7.3 Warnings and Cautions
WARNING: To prevent electrical shock, disconnect the electrical supply before attempting to make any repairs to the units. CAUTION: Electronic components used in these units are subject to damage from static electricity. Repairs made to the below listed sub-assemblies must be performed only in an antistatic, Electro-Static Discharge (ESD)-protected environment.
7.4 Replacement Instructions
See Figures 7-2 and 7-3 before removing or installing any component. These figures will detail the order in which each item must be removed or installed and should be used as a guideline for quick reference.
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Replacement Instructions (Continued)
Removal Flow Chart
Figure 7-2 Removal Flow Chart Chart Usage: Determine which item is to be replaced then follow the line of flow back to the "Top Enclosure" and begin the removal process. Detailed procedures begin on the referenced page numbers.
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Chapter 7: Repair & Replacement
Replacement Instructions (Continued)
Installation Flow Chart
Figure 7-3 Installation Flow Chart Chart Usage: Determine which item is to be installed then follow the line of flow down to the "Top Enclosure" and begin the installation process. Detailed procedures begin on the referenced page numbers.
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Chapter 7: Repair & Replacement
7.4.1 Bottom Strip Replacement
Replacement Part Number
Included in Kit: Bottom strip
622122
Tools Required: Isopropyl alcohol Cleaning cloth
Procedure
Removed / Installed During Process: · Bottom strip
WARNING: Electrical shock hazard: Disconnect the electrical supply before attempting to make any repairs to the devices. CAUTION: Electronic components used in these devices are subject to damage from static electricity. Repairs made to these devices must be performed only in an antistatic, ESD-protected environment.
Bottom Strip
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Chapter 7: Repair & Replacement
Bottom Strip Replacement (Continued)
Step 1
Removing the Bottom Strip
a. b. c. Place the unit on a protected work surface and carefully turn it over, exposing the bottom. Starting at one end, peel the bottom strip from the bottom enclosure. Use a cleaning cloth with a small amount of isopropyl alcohol to remove any adhesive residue remaining on the bottom enclosure.
Step 2
Installing the Bottom Strip
a. b. c. d. e. Remove the protective backing from the bottom strip. Align the bottom strip with the rib on the bottom enclosure. Starting at one end, set the bottom strip in place. Press the bottom strip firmly in place. Carefully ret