DeVilbiss DV63 Standard Plus User manual

MODEL DV63 STANDARD PLUS
MODEL DV64 AUTOADJUST®/ AUTOPLUS®
CAUTION-Federal (U.S.A.) law restricts this device to sale by or on the order of a physician.
Assembled in USA
SmartCode®Technology is protected under US patent 8649510
IMPORTANT- Do not provide this service manual to patients. Only qualied personnel should service this device.
DeVilbiss®intelliPAP®2 PAP DeVice
DeVilbiss blUe®PAP DeVice
serVice MAnUAl

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TABLE OF CONTENTS
GENERAL INFORMATION ..................... 3
A. Important Safeguards ..................... 3
B. Initial Inspection and Set Up................ 4
C. Travel ................................. 4
D. Battery and DC Power .................... 4
E. Supplemental Oxygen .................... 5
F. Setting Pressures and Features ............. 5
G. Understanding the Display Screen........... 6
H. Important Parts .......................... 7
DESCRIPTION OF NORMAL OPERATION ........ 8
CLEANING .................................. 8
A. Routine Cleaning - Patient ................. 8
B. Multi-Patient Use ........................ 8
MAINTENANCE .............................. 8
A. Initial Inspection and Setup ................ 8
B. Routine Maintenance - Patient .............. 8
C. Routine Maintenance - Equipment Provider.... 8
TESTING ................................... 9
A. Pressure and Flow Accuracy Test ........... 9
B. Triggering & SmartFlex®Pressure Test ....... 9
C. Keypad, Rotary Knob & Display Test ......... 9
D. Auto-Start / Auto-Stop Test ................. 10
E. SD Card & Speaker ...................... 10
F. Serial Port .............................. 10
NOTIFICATIONS, AUDIBLE ALERTS & SERVICE
CODES..................................... 11
Notifications & Audible Alerts .................. 11
Service Codes - Visible to Patients ............. 12
CALIBRATION ............................... 13
Auto-Calibration ............................ 13
Manual Calibration .......................... 13
TROUBLESHOOTING ......................... 14
CPAP SERVICING AND PARTS REPLACEMENT ... 16
Inspecting Internal Components................ 16
Bottom Cover .............................. 17
Top Cover ................................. 17
PC Board / Keypad ......................... 18
LCD Display / Encoder PC Board / Manifolds ..... 19
Blower.................................... 20
Main Wire Harness.......................... 21
UNIT SPECIFICATIONS ....................... 22
GENERAL INFORMATION - DV6HH.............. 23
A. Important Safeguards ..................... 23
B. Travel ................................. 23
C. DC Power .............................. 23
D. Important Parts .......................... 23
E. Product Description ...................... 24
DESCRIPTION OF NORMAL OPERATION - DV6HH.25
DV6HH Standard Humidifier .................. 25
DV6HHPD PulseDose Humidifier............... 25
MAINTENANCE AND TESTING - DV6HH.......... 26
A. Cleaning ............................... 26
B. Maintenance ............................ 26
C. Testing ................................ 26
Heater Plate Temperature Test .............. 26
Pulse Test .............................. 26
NOTIFICATIONS, AUDIBLE ALERTS & SERVICE
CODES - DV6HH ............................. 27
TROUBLESHOOTING - DV6HH ................. 27
HEATER SERVICING AND PARTS
REPLACEMENT - DV6HH ...................... 28
Chamber Sealing Gasket ..................... 28
Heater Plate ............................... 28
Top Cover ................................. 28
Heater Wire Harness ........................ 29
SPECIFICATIONS - DV6HH .................... 30
ORDERING AND RETURNING PARTS ........... 30
Ordering Non-Warranty Replacement Parts ...... 30
Ordering Warranty Replacement Parts .......... 30
Returning Warranty Defective Parts............. 30
Placing orders ............................. 30
FIGURES & PARTS LIST....................... 31
PRODUCT DISPOSAL......................... 35
DEVILBISS GUIDANCE AND MANUFACTURER’S
DECLARATION .............................. 36

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GENERAL INFORMATION
A. Important Safeguards
When servicing electrical products, basic safety precautions should
always be followed.
PLEASE READ ALL INSTRUCTIONS BEFORE
USING THIS DEVICE.
WARNING
A warning indicates the possibility of injury to the user or the
operator.
• Electric Shock Hazard – Do not use while bathing.
• Electric Shock Hazard – Do not immerse this device into water
or any other liquid.
• Electric Shock Hazard – Do not attempt to open or remove the
cabinet. There are no user-serviceable internal components. If
service is required, contact your equipment provider for
instructions on obtaining service. Opening or attempting to
service your device will void the warranty.
• Refer to International Standard IEC 60601-1 Ed 3.0 Amendment
1 for safety requirements applicable to Medical Electrical
Systems
• Oxygen supports combustion. To avoid possible physical injury,
do not smoke while using this device with supplemental oxygen.
Do not use this device near hot objects, volatile substances or
sources of open ames.
• Always turn on the CPAP device before turning on the oxygen
source. Turn off the oxygen source before turning off the device.
Never allow the oxygen source to run continuously while
connected to the device if the device is not in use. If the device is
not being used, turn off the oxygen ow.
• CPAP pressure must be set higher than 8 cmH2Ofor
supplemental oxygen use to prevent patient breathing pattern
from forcing oxygen back into the CPAP.
• At a xed ow rate of supplemental oxygen, the inhaled oxygen
concentration will vary depending on the pressure setting, patient
breathing pattern, mask selection and leak rate. This warning
applies to most types of CPAP devices.
• The device should be used only with vented CPAP masks
recommended by DeVilbiss, your physician or respiratory
therapist. These include nasal, full face, nasal pillow and nasal
cannula masks designed for CPAP use. Do Not use a non-vented
mask with this CPAP device.
• To avoid rebreathing of exhaled air, do not use a CPAP mask
unless the device is turned on and providing a supply of air.
Venting in the mask should never be blocked. When the device is
turned on and providing a fresh supply of air, exhaled air is
ushed out of the mask vent. However, when the device is not
operating, exhaled air may be rebreathed. Rebreathing of
exhaled air for longer than several minutes can, in some
circumstances, lead to suffocation. This warning applies to most
CPAP devices.
• The device is not a life support device and may stop operating
with certain device faults or with a power failure. It is intended to
be used on spontaneously breathing individuals weighing 66
lbs/30 kg or greater.
• To avoid electric shock, always unplug power cord from wall
outlet power source when cleaning or servicing.
• The following surface temperatures may exceed 41˚C under
certain conditions:
External surface of CPAP................................................ 43˚C
Patient tubing connector..................................................45˚C
Encoder shaft (with control knob removed).....................42˚C
Humidier heater plate ....................................................65˚C
External power supply ..................................................... 42˚C
• Equipment not suitable for use in the presence of a ammable
anesthetic mixture with air or with oxygen or nitrous oxide.
• Medical Electrical Equipment needs special precautions
regarding EMC and needs to be installed and put into service
according to the Electromagnetic Compatibility [EMC] information
provided in the accompanying documents.
• Portable and Mobile RF Communications Equipment can affect
Medical Electrical Equipment.
• The equipment or system should not be used adjacent to or
stacked with other equipment. If adjacent or stacked use is
necessary, the equipment or system should be observed to verify
normal operation in the conguration in which it will be used.
• If you are using a full face mask (a mask covering both your
mouth and your nose), the mask must be equipped with a safety
(entrainment) valve.
• Do not connect the device to an unregulated or high pressure
oxygen source.
• Do not use the device near a source of toxic or harmful vapors.
• Do not use this device if the room temperature is warmer than
40˚ C (104˚ F). If the device is used at room temperatures
warmer than 40˚ C (104˚ F), the temperature of the airow may
exceed 43˚ C (109˚ F). This could cause irritation or injury to your
airway.
• Do not operate the device in direct sunlight or near a heating
appliance. These conditions can increase the temperature of the
air coming out of the device.
• Contact your health care professional if symptoms of sleep
apnea recur.
• If you notice any unexplained changes in the performance of this
device, if it is making unusual or harsh sounds, if it has been
dropped or mishandled, if water is spilled into the enclosure or if
the enclosure is broken, disconnect the power cord and
discontinue use. Contact your home care provider.
• Periodically inspect electrical cords and cables for damage or
signs of wear. Discontinue use and replace if damaged.
CAUTION
A Caution indicates the possibility of damage to the device.
• For proper operation, place system on a at, sturdy, level
surface. Do not place the device where it can be knocked onto
the oor or where the power cord may create a trip hazard.
• Never block air openings of the device. Do not insert objects into
any openings or tubes.
• Use only accessories recommended by DeVilbiss.
• The USB port located on the back of the device is for provider
use only. The port must only be used with accessories approved
for use by DeVilbiss. Do not attempt to attach any other device to
this port as it may damage the CPAP or the accessory device.
• Only the DeVilbiss DV6 series Heated Humidier system is

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GENERAL INFORMATION
recommended for use with this device. Other humidier systems
may prevent the device from detecting respiratory events and
may cause inappropriate pressure levels in the mask.
• The height of the device must be lower than the mask when
using a humidier to prevent water from getting into the mask
• Never rinse or place the device in water. Never allow liquids to
get into or around any of the ports, switches or air lter. Doing so
will result in product damage. If this occurs, do not use the
device. Disconnect the power cord and contact your equipment
provider for service.
• Condensation may damage the device. If this device has been
exposed to either very hot or very cold temperatures, allow it to
adjust to room temperature (operating temperature) before
starting therapy. Do not operate the device outside of the
operating temperature range shown in the Specications.
• Do not place the device directly onto carpet, fabric or other
ammable materials.
• Tobacco smoke may cause tar build-up within the device, which
may result in the device malfunctioning.
• Dirty inlet lters may cause high operating temperatures that may
affect device performance. Regularly examine the inlet lters as
needed for integrity and cleanliness.
• Never install a wet lter into the device. You must ensure
sufcient drying time for the cleaned lter.
• Only use a DeVilbiss DC Power Cord and Battery Adapter Cable.
Use of any other system may cause damage to the device.
• Oxygen is a prescribed gas and should only be administered
under the supervision of a physician.
• The ow setting of the oxygen source must be specied by a
physician.
• Maximum oxygen pressure is 50 psi.
• Maximum oxygen ow rate is 10 lpm.
• Always turn on CPAP before turning on oxygen ow.
• Always turn off oxygen ow before turning off CPAP.
• Proper lter function is important for the operation of the device
and to protect the device from damage.
B. INITIAL INSPECTION AND SET UP
DeVilbiss recommends equipment inspection upon delivery:
• Apply power to the IntelliPAP 2 / DeVilbiss BLUE DV6X CPAP
device.
• Test pressure accuracy using an outlet cap (mask/leak simulator),
a calibrated CPAP pressure gauge and the procedures listed
under Pressure Accuracy Test in this manual.
• Set therapy pressures as prescribed and comfort features per
patient preference using Setting Pressures and Features Section
or the Provider Quick Setup Guide DV64D-125-XX.
C. TRAVEL
Air Travel
The IntelliPAP 2 and DeVilbiss BLUE DV6X CPAP devices are
approved for use on commercial aircraft when using battery power as
mentioned below.
NOTE: Use in Commercial Aircraft Approval requires that Bluetooth®
must be deactivated in the aircraft. Refer to Instruction Guide for
Bluetooth details. Also see DC Power below.
International Travel
DV6x CPAP devices automatically accept AC voltages of 100-240V, 50
and 60 Hz. The device will need a power cord appropriate for the
region/country. NOTE: Using a power cord or adapter (AC or DC) that
is not intended for the DV6x CPAP may result in the CPAP showing
error code E0D.
Altitude
DV6x CPAP devices automatically compensate for altitudes between
700 hPa and 1060hPa (~ 1,400 ft below sea level to 9,800 ft). At
higher altitudes, breathing patterns change which may cause the loss
of some benets of CPAP therapy.
D. BATTERY AND DC POWER
DV6x CPAP devices automatically accept 12V DC power. Always use
DeVilbiss power cords and adapters. NOTE: Using a power cord or
adapter (AC or DC) that is not designed for the DV6 CPAP may result
in the CPAP showing error code E0D.
Custom Battery (Optional)
DV6x CPAP devices have an optional 98 wHr external battery
(DV6EB) that is designed as a backup power source when AC power
is not available, when traveling by air or any time portability is needed.
Pressure and DV6EB Battery Limitation Chart
Pressure
Setting
CPAP only
Hours
CPAP &
Heated
Humidier @ 1
CPAP & Heated
Humidier @ 3
CPAP & Heated
Humidier @ 5
5 23.33 7.46 7.01 4.54
10 14.41 6.13 5.76 3.92
15 10.32 5.30 4.26 3.27
20 7.21 4.56 3.51 2.95
One battery needed
for 8 hour night
Two batteries needed for
8 hour night
Three batteries needed
for 8 hour night
12 Volt DC Power
DV6x CPAP devices with heated humidication will operate using 12V
DC power from a motor vehicle equipped with DC (cigarette lighter
type) plug-in connector. The device must be connected to the plug-in
using the optional DeVilbiss vehicle DC connector (DV6X-619). NOTE:
If the vehicle’s battery is used, for multiple nights, without powering the
vehicle’s motor during use, the vehicle should be powered during the
day to replenish the battery.
DV6x CPAP devices with heated humidication will operate using a
12V deep-cycle marine battery using the optional DC battery clamp-on
adapter (DV51D-696) with the optional DC power cord (DV6X-619).
NOTE: See DC Power Chart below for the correct battery amperage
needed.

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GENERAL INFORMATION
DV6x CPAP devices will operate on 12V DC power that has been
inverted to 120V AC power. NOTE: See DC Power Chart below for
the correct inverter specications.
DC Power Chart for Vehicle & 12V Marine Battery
Conguration of
Use
Inverter
Specication for
use in vehicle
Battery
Specication for
stand-alone use
Battery Hours
@ 20 cmH2O
If using a vehicle battery for multiple nights without powering the vehicle’s
motor during use, power the vehicle during the day to replenish the battery.
CPAP device
with heated
humidication
setting of 5
120V AC Modied
or Quasi Sine
Wave Inverter with
200w capacity 120 amp-hour,
deep-cycle
Marine Type
8 hours
120V AC Modied
or Quasi Sine
Wave Inverter with
300w capacity
230V AC Modied
or Quasi Sine
Wave Inverter with
400w capacity
240 amp-hour,
deep-cycle
Marine Type
16 hours
CPAP device
without heated
humidication
80 amp-hour,
deep-cycle
Marine Type
8 hours
E. SUPPLEMENTAL OXYGEN
WARNING-OXYGEN USE
• Oxygen supports combustion. To avoid possible physical injury,
do not smoke while using this device with supplemental oxygen.
Do not use this device near hot objects, volatile substances or
sources of open ames.
• Always start the CPAP blower before starting the oxygen ow.
Stop the oxygen ow before stopping the CPAP blower.
• Never allow the oxygen source to run continuously while
connected to the DeVilbiss CPAP device if the device is not in
use. If the DeVilbiss CPAP device is not being used, turn off the
oxygen ow.
• CPAP pressure must be set higher than 8 cmH2Ofor
supplemental oxygen use to prevent patient breathing pattern
from forcing oxygen back into the CPAP.
• At a xed ow rate of supplemental oxygen, the inhaled oxygen
concentration will vary depending on the pressure setting, patient
breathing pattern, mask selection and leak rate.
This warning applies to most types of CPAP devices.
CAUTION
• Oxygen is a prescribed gas and should only be administered
under the supervision of a physician.
• The ow setting of the oxygen source must be specied by a
physician.
• Maximum oxygen pressure is 50 psi (345 kPa). Maximum oxygen
ow rate is 10 LPM.
If a physician prescribed supplemental oxygen, it can be added one of
two ways:
• Attach oxygen tubing directly to the oxygen port on the mask
• Insert the optional oxygen adapter into the device’s air supply
port. Then, insert the air supply tubing and the oxygen tubing to
the adapter.
• Always START CPAP before starting oxygen ow.
• Always STOP oxygen ow before stopping CPAP.
Oxygen Adapter
(7353D-601)
F. SETTING PRESSURES AND
FEATURES
Factory Default Settings
Factory default settings are installed on the IntelliPAP 2/DeVilbiss
BLUE DV6x CPAP device prior to shipping.
Setting Default Value
Operating Mode DV63 - CPAP
DV64 - AutoAdjust
CPAP pressure Default 10.0 (DV63 initial setting is 8.0,
default is 10.0)
Upper Pressure Limit (UPL) 15.0 for DV64 AutoAdjust mode
Lower Pressure Limit (LPL) 7.0 for DV64 AutoAdjust mode
Apnea % 90
Apnea Duration 10 seconds
Hypopnea % 40
Hypopnea Duration 10 seconds
Ramp Pressure 4.0 cmH2O
Ramp Time 20 minutes
Split Night - Inhibit Time 240 minutes
Number of Sessions 0 (off)
Usage Threshold 4 hours
Wakeup Alert 0 (Off)

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GENERAL INFORMATION
Changing Settings
Use the following steps to enter Clinical menu and change therapy and comfort settings:
1. Apply power to the device.
2. Enter Clinical menu by simultaneously pressing the Blower START/STOP button, the Ramp button and the Rotary Knob.
3. Turn the rotary knob to desired setting item and press the rotary knob to select the setting item. See Provider Quick Setup Guide,
DV64D-125-XX for more details.
4. Return to Patient mode by pressing the knob and buttons used in Step 2.
G. UNDERSTANDING THE DISPLAY SCREEN
Therapy Screen: Blower On
Clock (if active)
Status Icons (see inset )
Current delivered
pressure
Ramp On and Time
Remaining Indicator
SmartFlex On Indicator
Mode Indicator
Blower On Indicator
Inset: Status Icons
Bluetooth Signal Indicator
Wake-Up Alarm Indicator
Oximeter Connected Indicator
USB Connected Indicator
Idle Screen: Blower OffIdle Screen: Blower On
Ramp Indicator
Therapy
Pressure Blower
On
Indicator
Idle Screen: Blower On (Without
Clock)
Idle Screen: Blower Off (Without
Clock)
Humidifier On and Setting
Indicator (only illuminated if
optional humidifier is attached)
Submenu Title
Screen Overview
Back Indicator
Setting Locked Indicator
Page
Indicator

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GENERAL INFORMATION
Heater On / Hot Surface LED Indicator
(only active with optional heated humidification)
Blower ON /
OFF Button -
starts and stops
Therapy
Ramp Button - starts
and stops Ramp
Rotary Knob -
Simple Press & Turn
operation
Display
- returns to Idle Screen after 10 seconds without
user action when in Main Menu.
- returns to Main Menu after 2 minutes without
user action when in any submenu.
Speaker
Air Filter
Tubing
Connector
Power Connector
SD Card Slot
USB Port
(for provider
use only)
Air Supply Port
Cover Filter Cover
Front/Top View Side View (Right)
Rear View
Air Supply Port to
Heated Humidifier
Power Connector to
Heated Humidifier
Bottom View
Rear View with Filter Cover
H. Important Parts

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OPERATION / CLEANING / MAINTENANCE
DESCRIPTION OF NORMAL OPERATION
An AC to DC power supply, plugged into an AC power source,
converts AC voltage to DC voltage and powers the internal electronics
of the DV6X CPAP device, such as microcontroller, motor control
circuitry, blower, display, etc. Alternatively, the DV6X device is powered
by DC voltage from a DC power source via an optional DC power
adapter.
The CPAP device produces positive pressure by spinning a reverse-
curved impeller with a brushless DC motor. Room air is drawn through
a lter into the blower, pressurized in the blower, optionally passed
through a heated humidier chamber and then discharged through a
15 or 22mm-ID, smooth-bore tube. Pressure regulation is achieved
using measured pressure as feedback.
The CPAP device senses patient breathing by monitoring the ow
signal. A ow sensor triggers the Auto-START / Auto-STOP
functionality and mask-OFF alerts.
CLEANING
WARNING
To avoid electric shock, always unplug the power cord from the
wall outlet power source before cleaning.
CAUTION: Never rinse or place the device in water. Never allow
liquids to get into or around any of the ports, switches or air lter.
Doing so will result in product damage. If this occurs, do not use the
device. Disconnect the power cord and contact your equipment
provider for service.
A. Routine Cleaning – Patient
• Disconnect from power source and wipe the cabinet with a clean,
damp cloth every 7 days. Allow the device to dry completely
before returning to power source.
• Check the outer air-inlet lter every 10 days. Wash the dark foam
lter in a solution of warm water and mild dishwashing detergent.
Rinse with water. Allow the lter to dry completely before
returning to the device. Replace every 6 months or sooner if
necessary.
• Check the optional ne particle (inner) lter every 10 days and
replace if dirty or damaged. Replace every 30 days.
• Clean the air supply tubing every day. Remove the tubing from
the device and mask and wash the inside of the tubing in a
solution of warm water and mild dishwashing detergent. Rinse
with water and allow to air dry – to shorten drying time, connect
tube to the device and allow air to ow through the tube – visually
inspect tubing for water before use. Replace every 6 months.
• Clean the mask and headgear according to the manufacturer’s
instructions or the device’s programmed notication.
B. Multi-Patient Use
The IntelliPAP 2 / DeVilbiss BLUE CPAP DV6x device is not approved
for multi-patient use at this time.
MAINTENANCE
WARNING
Electric shock hazard. Disconnect power supply before servicing.
A. INITIAL INSPECTION AND SET UP –
Equipment Provider
DeVilbiss recommends equipment inspection upon delivery:
• Apply AC power to the DV6X CPAP device.
• Test pressure accuracy using an outlet cap (DV51D-620), a
calibrated pressure gauge and the procedures listed under
Pressure Accuracy Test.
• Set prescribed therapy and patient features as described under
Setting Pressures and Features Section or as described in the
Provider Quick Setup Guide, DV6X-125-xx.
B. ROUTINE MAINTENANCE – Patient
Instruct patient on the following at-home maintenance tasks:
• Wipe case with damp cloth every week.
• Inspect air-inlet lter every 10 days and clean as needed.
Replace every 6 months
• Inspect ne particle lter every 10 days and replace as needed.
Do NOT clean. Replace every 30 days
NOTE: Carefully demonstrate the proper alignment of the Fine
Particle and Air-Inlet lters.
• Wash air supply (patient) tubing daily.
• Clean mask and headgear per manufacturer’s instructions.
C. ROUTINE MAINTENANCE – Equipment
Provider
The DV6X CPAP devices do not require routine maintenance.
Pressure Accuracy–No routine calibration or service is required
provided the device is used in accordance with the manufacturer’s
directions.
NOTE: Some countries require periodic servicing and calibration of
this type of medical device. Contact local authorities for further
information.
Clearing Usage/Therapy Data
• Apply AC power to the DV6X CPAP device.
• Enter the Clinical menu by pressing the Start and Ramp buttons
while pressing the knob.
• Turn the knob to scroll to CPAP Settings and press the knob to
select.
• Scroll to Admin (last option in list) and press the knob to select.
• Scroll to Clear Usage and press the knob to select.
• Scroll to Clear Usage and press the knob to clear all user data
from the device and SD card, if inserted when usage is cleared.
NOTE: You will not be able to retrieve this data after it has been
cleared.
• Simultaneously press the Blower ON/OFF button, the Ramp
button and the Rotary knob to return to Patient menu.

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TESTING
TESTING
The following test procedures verify correct operation of the DV6x
CPAP and should be performed on all devices prior to returning to
patient.
A. PRESSURE AND FLOW ACCURACY TEST
No routine calibration or service is required provided the device is
used in accordance with the manufacturer’s directions. NOTE: Some
countries require periodic servicing and calibration for this type of
medical device. Contact your equipment provider for further
information.
Additional equipment required: outlet cap (DV51D-620), a calibrated
pressure gauge (0-30 cmH2O, accuracy ±0.25 cmH2O) with tubing,
ow control valve and a mass ow meter.
1. Apply AC power to the unit with blower stopped.
2. Enter Clinical menu, select CPAP Settings and ensure the
following settings are selected
a. Mode to CPAP
b. Pressure to 12 cmH2O
c. SmartFlex to OFF
3. Go to Mask Fit Check screen.
4. Attach calibrated pressure gauge to the device using the outlet
cap.
NOTE: Occlude (block) hole on side of outlet cap to ensure proper
pressure reading. Any leak in test set-up will affect pressure accuracy.
5. Start the blower and wait 30 seconds for pressure to stabilize.
6. Verify that the displayed pressure matches the pressure measured
on the gauge (±0.5 cmH2O). Accuracy at other pressure settings
can be checked if needed.
7. If the Pressure is out of calibration, remove tubing and stop the
blower for approximately 1 minute to auto-calibrate. Allow no
breathing on the unit while auto-calibration is taking place. Start
the blower and allow 30 seconds for the pressure and ow to
stabilize.
NOTE: If the pressure is still out of calibration, perform a full
calibration using the Manual Calibration Procedure. If manual
calibration does not improve pressure or ow accuracy, there may be a
problem with the ow path or control board. Refer to Troubleshooting.
8. Connect the mass ow meter and ow control valve to the unit
outlet port and close the valve.
9. In the Mask Fit Check screen, adjust the ow control valve to
achieve 60 L/m on the ow meter. Wait at least 30 seconds for
the ow to stabilize.
10. Verify that the leak ow on the Mask Fit Check screen matches
the 60 L/m on the ow meter (set value ±10 L/m). Accuracy at
other ow settings can be checked if needed.
11. Correct all settings to the original, preferred or prescribed
settings.
12. If the ow is out of calibration, remove tubing and stop the blower
for approximately 1 minute to auto-calibrate. Allow no breathing
on the unit while auto-calibration is taking place. Start the blower
and allow 30 seconds for the pressure and ow to stabilize.
NOTE: If the ow is still out of calibration, perform a full calibration
using the Manual Calibration Procedure. If manual calibration does not
improve pressure or ow accuracy, there may be a problem with the
ow path or control board. Refer to Troubleshooting.
B. TRIGGERING and SMARTFLEX PRESSURE
TEST
Additional equipment required: ow control valve, USB to Micro B USB
CPAP to PC cable (DV63D-615) and a PC computer running DeVilbiss
SmartLink®software v 3.0 or higher.
1. Connect the ow control valve to the unit outlet port and close the
valve.
2. Apply AC power to the unit and connect the unit to the remote
control application via the CPAP to PC cable.
3. Use the remote control application to ensure the following device
settings are selected:
• Operating mode is CPAP
• CPAP Pressure is 12 cmH2O
• SmartFlex is 3
• SmartFlex Mode is Full-Time.
Start the blower and wait at least 30 seconds for the pressure to
stabilize.
4. Display the Status screen on the remote control to observe the
Triggering eld.
5. Open the ow valve slightly to allow a small amount of air to
escape. Allow the valve to remain open for several seconds and
then quickly close the valve. Continue cycling the valve opening
slightly then closing quickly and verify that the Status screen
triggering value changes from’ inhale’ to ‘exhale’. It may take
several cycles before the unit starts triggering.
6. If the unit did not trigger correctly during this test, stop the blower
for approximately 1 minute to allow auto-calibration to occur. Start
the blower and allow 30 seconds for the pressure to stabilize.
Repeat above steps to check unit triggering.
NOTE: If the unit still does not trigger correctly, perform a full
calibration using the Manual Calibration Procedure. If manual-
calibration does not improve triggering, there may be a problem with
the ow path, control board or blower. Refer to Troubleshooting.
7. Observe the SmartFlex pressure increase and decrease during
‘inhalation’ and ‘exhalation’. The pressure should change between
12 to 9 cmH2O.
8. Correct all settings to the original, preferred or prescribed
settings.
NOTE: If there is an issue with triggering ‘inhalation’ or ‘exhalation’ or
with the SmartFlex pressure change, replace PC board.
C. KEYPAD, ROTARY KNOB and DISPLAY
TEST
Requires DV6HH humidier to be attached to DV6x CPAP. No
additional equipment required.
1. Apply AC power to the unit and start the blower.
2. Enter Clinical menu. Rotate the knob to nd the CPAP Settings
menu; then press the knob to select.
3. Continue to the Ramp setting, press the knob and go to the Time
setting. Set a 5 minute delay.
4. Go to the Pressure setting, select it and set the pressure to 3.0.
5. Rotate the knob to the left to highlight the arrow by the Ramp
menu. Press to select.
6. Go to the Humidity setting, select it and rotate the knob to ensure
that at least one heat icon is displayed.

LT-2320
10
TESTING
7. Go to the Brightness menu and select Display in Active mode.
Rotate the knob and observe the change in the brightness of the
display. Protect the Display from room light if needed.
8. Return to the Brightness menu, select Controls in Active mode,
protect the Keys and Rotary Knob from room light, rotate the
knob and observe the change in the brightness of the keys and
knob. Select a brightness level.
9. Allow the Display to return to the main screen, view the pressure,
press the Ramp key and observe the Ramp pressure and the
remaining Ramp time on the Display.
10. Ensure that the Heater On/Hot Surface Indicator light is
illuminated.
11. Correct all settings to the original, preferred or prescribed
settings.
NOTE: If there is an issue with the functionality or brightness of the
Key Pad, Rotary Knob or Display, refer to Troubleshooting.
D. AUTO-START/AUTO-STOP TEST
Additional equipment required: an adult test lung or 6 ft (1.8 m) x 22
mm smooth bore tubing. Use of tubing with dimensions other than 6 ft
(1.8 m) x 22 mm will interfere with the Auto-START test. NOTE: The
change in tubing diameter allows testing without actual breathing. The
15 mm tubing has no issue activating Auto-START/Auto-STOP with
patient breathing.
Auto-STOP Test
1. Apply AC power to the unit with blower stopped.
2. Enter Clinical menu.
3. Go to CPAP Settings and select the Enable menu.
4. Ensure that a 9appears beside both Auto-START & Auto-STOP
features.
5. Return to Patient menu.
6. Start the blower and keep the airow blocked for two minutes.
Verify that the blower continues running and no mask alerts
appear.
7. Unblock the smooth bore tubing to open the unit’s airow.
8. Verify that, after approximately 10 seconds, the Display shows
‘Mask Off / Please check mask t’.
9. After another 30-40 seconds, the blower should stop via the Auto-
Stop feature. Wait approximately two minutes after the blower
stops. Verify that the blower does not start without breathing
present.
Auto-START Test
If using an adult test lung:
a. Attach lung to the tubing connector port on the unit.
b. Manually simulate breathing by manipulating the sides of the
lung – out for inhalation, then in for exhalation – and verify
that the blower starts via the Auto-START feature.
Auto-START Test
If using 6 ft (1.8 m) x 22 mm tubing:
a. Go to CPAP Settings and select Tubing. Ensure that tubing
Length is set to 6 ft (1.8 m) and diameter is set to 22 mm.
b. Connect the 6 ft (1.8 m) x 22 mm smooth bore tubing to the
CPAP.
c. Tap the palm of your cupped hand on and off the end of
the smooth bore tubing several times to verify that the
blower starts via the Auto-START feature. (Hold your
cupped hand 18 in. (45.7 cm) from the hose to force air
into the tubing using a slow steady ‘breath rate” to activate
the ow sensor.)
10. Correct all settings to the original, preferred or prescribed
settings, including the tubing diameter.
NOTE: If any of the Auto-STOP or Auto-START features do not
operate correctly, stop the blower for approximately 1 minute to allow
auto-calibration to occur. Start the blower and allow 30 seconds for the
pressure and ow to stabilize. If Auto-STOP or Auto-START features
still do not operate correctly, perform a full calibration using the Manual
Calibration Procedure. If manual calibration does not resolve issue,
replace PC board.
E. SD CARD AND SPEAKER
Additional equipment needed: SD card.
NOTE: The SD card must be a minimum of 128MB and a maximum of
2GB in size and formatted to FAT16.
1. Apply AC power to the unit and start the blower.
2. Listen for speaker ‘beep’ as SD card is inserted in SD card slot.
3. Verify that the notication on the Display reads: Card Detected /
Ready For Use
NOTE: If there is an issue with the speaker or SD card, replace the
speaker or SD card as needed.
F. SERIAL PORT
Additional equipment needed USB to Micro B USB CPAP to PC cable
(DV63D-615) and a PC computer running DeVilbiss SmartLink
software v 3.0 or higher.
1. Connect USB to Micro B USB cable to the unit and the computer.
2. Verify that the USB icon illuminates on the CPAP display (left
side).
3. Open SmartLink software and click on the Download Data icon in
the software’s Home tab.
4. Select Direct Connect option and complete the data download
5. Find and open the data downloaded to the software
6. Verify that the data is complete and accurate.
NOTE: If there is an issue with the data download, replace the USB
cable. If that does not x the problem, replace PC board.

LT-2320
11
NOTIFICATIONS, AUDIBLE ALERTS AND SERVICE CODES
Notifications and Audible Alerts
NOTE: To disable notications from the patient’s view, select CPAP Settings in the Clinical menu and remove the 9 from Notications in the
Enable menu.
Some notications are timed reminders to clean or replace components. Dismiss from the Display by button-press or knob-movement.
Displayed Message Recurrence interval
Air Intake Filter Due for Cleaning 50 hours of while breathing use time
Mask, Tubing and Chamber Due for Cleaning 35 hours of while breathing use time
Some notications have audible alerts. Audible alerts signify that attention should be given to the message on the Display. Dismiss from the
Display by button press or knob movement.
Some notications are in response to a condition or action. These may be informational or may require action. Dismiss from the Display by
button press or knob movement.
Displayed Message Condition for Occurrence
Mask Off Please Check Mask Fit 10 seconds after mask off condition detected.
Auto-STOP Detected When an Auto-STOP condition occurs.
Auto-START Detected When an Auto-START condition occurs.
Wake-Up Alert <current time> with audible alert When wakeup alert setting is enabled, and wake alarm time is reached on device
Card Detected Please Wait … with audible alert When SD card is detected. (Removing SD card while this message is displayed may corrupt the
download.)
Card Detected Ready for use with audible alert When valid SD Card is inserted.
Card Removed Send to Provider with audible alert When SD card is removed.
Card Error Contact Provider with audible alert CPAP detects an error with the format or read/write of the SD card
Settings Not Updated Contact Provider with audible alert When new settings did not transfer from SD card
Error with Code, Prescription Not Updated with audible
alert
When SmartCode Rx is entered but code is incorrect.
Card Transfer Successful When data transfer complete.
Firmware Update Please Wait … When SD Card containing rmware update is inserted.
Some notications are displayed when Add-On items are in use. Dismiss from the Display by button press or knob movement.
Displayed Message with Audible Alert Condition for Occurrence
Oximeter Logging Started
SpO2 _____
Pulse Rate _____
When Oximeter is rst detected and logging starts
Oximeter Logging Stopped When Oximeter signal is lost and logging stops
Oximeter Finger Probe Off When Oximeter nger probe off condition detected
Oximeter Finger Probe On
SpO2 _____
Pulse Rate _____
When Oximeter nger probe off condition corrected
Wireless Modem Low Battery, Please Recharge When DV6WM is paired and battery level is low (below 20%)

LT-2320
12
NOTIFICATIONS, AUDIBLE ALERTS AND SERVICE CODES
Service Codes (Visible to Patients) and Audible Alerts
Service codes are divided into Critical (E0x) or Non-Critical (E8x) categories. Critical service codes put the unit in a failsafe (blower STOP) state.
All service codes have audible alerts. Audible alerts signify that attention should be given to the message on the Display. Critical Service Codes
cannot be cleared from the Display. Non-Critical Service Codes can be cleared from the Display by button press or knob movement.
Service Code
CRITICAL SERVICE CODE
Description
E00 No error present
E01 Read Setting Error. Prescription settings stored in non-volatile memory are corrupted.
E02 Motor Start Error. Error trying to start the motor.
E06 Motor Runaway Error. This error occurs if the motor speed is high and the pressure and total ow are low (close to zero) for a xed period of
time.
E07 Motor Over Current Error.
E08 Motor Bus Voltage Too High Error.
E09 Motor Bus Voltage Too Low Error.
E0B Sensor Error. This error occurs if there is a problem communicating with the I2C pressure or ow sensor.
E0D Unsupported Power Source Detected. The power source attached to the CPAP is unsupported.
Service Code
NON-CRITICAL SERVICE CODE
Description
E80 Power Source Wattage Too Low. The attached power supply does not have enough power to run the unit and accessories. Unit may not meet
performance requirements.
E81
HEATER
PulseDose Valve Error. This error indicates that the PulseDose valve is not working correctly. This error only occurs once per blower start-up
and is reset after the blower stops.
E82
HEATER
Heater Plate Error. This error indicates that the humidier heater plate is not working correctly. The heater LED is unlit (unless the heater plate
temperature reading is greater than 48 ºC) and the CPAP stops powering the humidier heater plate. This error only occurs once per blower
start-up and is reset after the blower stops.
E83 Clock Failure. This error occurs if the real-time clock is not advancing. Data logging will be stopped due to the failure. This error only occurs
once per blower turn on and is reset once the blower is turned off.
E84 NAND Flash Failure. This error occurs if the NAND ash memory fails. Data logging will be stopped due to the failure. The message is shown
once per blower on.

LT-2320
13
CALIBRATION
CALIBRATION
Auto-Calibration
The DV6x CPAP device automatically saves the offset and high
calibration values every time the blower stops for 1 minute. During that
time, the unit adjusts the pressure and ow sensor offsets so that the
proper calibration span is maintained.
Manual Calibration Procedure (Field Service)
The DV63/64 pressure and ow sensors can be calibrated manually
using the following procedure. It is recommended that the PAP be
recalibrated using this procedure whenever the PC board or blower is
replaced or when testing or troubleshooting indicate calibration is
required.
Required Equipment:
• PC with a free serial port
• USB to USB micro-B cable (DV63D-615)
• Terminal Program (Microsoft Windows HyperTerminal or
equivalent)
• Calibrated pressure meter (0 to 30 cmH2Orange)
• Calibrated mass airow meter (0 to 150 Std. L/min range)
• Ball valve (or equivalent) to control the DV6x device ow
• Particulate Matter (PM) Filter (optional)
Figure 1 Calibration Setup
PC
USB to
USB Micro-B
Cable
DV65/66 Device
Pressure Meter
Ball
Valve
PM
Filter
Flow
Meter
Procedure:
1. Setup the DV63/64 device as shown in Figure 1 and connect the
DV6x device to the DC power supply. Do not attach the heated
humidier chamber to the DV6x device while performing
calibration. Initially the ball valve should be closed so that no air
can pass through.
2. Use a terminal program (such as Windows HyperTerminal) with
COM settings 9600 baud, no parity, 8 data bits, 1 stop bit, Flow
Control set to none. Open the terminal program and connect to
the DV6x device. When sending terminal commands, the DV6x
device will respond with “WF” if a command was not properly
received, and the command should then be resent.
3. Send the terminal command ‘Mo=3’ to put the device into
calibration mode.
4. Send the terminal command ‘FE=00’ to disable Auto-STOP.
5. In this step the low pressure value and low ow value will be
calibrated. These calibration points are for when the pressure and
ow values equal 0 cmH2Oand 0 SLPM.
a. Send the terminal command ‘Rs=O’ to ensure the DV6x
device blower is off.
b. Wait forty seconds for the DV6x device internal ltering to
stabilize.
c. Send the terminal command ‘Tc=cpl’ to calibrate the DV6x
device low pressure value.
d. Send the terminal command ‘Tc=c’ to calibrate the DV6x
device low ow value.
6. In this step the high pressure value will be calibrated. This
calibration point is for when the DV6x device blower is on and the
pressure equals 20.0 cmH2O.
a. Send the terminal command ‘Tw=18000’ to set the motor
speed to 18,000 RPM. This motor speed value should
achieve a pressure that is close to 20 cmH2O.
b. Send the terminal command ‘Rs=R’ to turn the DV6x device
blower on. Check the ball valve to ensure that it is closed,
and that no air is owing through.
c. The external pressure meter should be reading a value that
is equal to 20.0 cmH2O. If the pressure does not equal 20.0
cmH2O, the terminal commands ‘Tw+’ and Tw-‘ can be used
to increase or decrease the motor speed in small
increments, thus increasing and decreasing the pressure.
Once a pressure that is equal to 20.0 cmH2Ohas been
achieved, wait forty seconds for the DV6x device internal
ltering to stabilize.
d. Send the terminal command ‘Tc=cph’ to calibrate the high
pressure value. NOTE: If the current pressure measurement
is not equal to exactly 20.0 cmH2O, the terminal command
‘Tc=cphNN.NN’ can be used to interpolate the pressure
calibration value. For example, the terminal command
‘Tc=cph19.97’ can be used to calibrate the high pressure
value with the interpolated pressure of 19.97 cmH2O.
7. In this step the high ow value will be calibrated. This calibration
point is for when the DV6x device blower is on and the ow
equals 110 SLPM.
a. The DV6x device blower should still be turned on at the
motor speed value used for the high pressure calibration in
Step 6, and the ball valve closed.
b. Open the ball valve and adjust the ball valve until the ow
meter measures 110 SLPM.
c. Wait forty seconds for the DV6x device internal ltering to
stabilize.
d. Send the terminal command ‘Tc=cfh’ to calibrate the high
ow value. NOTE: If the current ow measurement is not
equal to exactly 110 SLPM, the terminal command
‘Tc=cfhNNN.N’ can be used to interpolate the ow calibration
value. For example, the terminal command ‘Tc=cfh109.5’ can
be used to calibrate the high ow value with the interpolated
ow of 109.5 SLPM.
8. Testing will be performed to check the ow calibration settings.
Adjust the ball valve to change the ow rate. Send the terminal
command ‘Fl’ and verify that the DV6x device returned ow value
is within ± 4 SLPM of the ow measurement from the ow meter.
Repeat this step at various ow rates.
9. In this step, testing will be performed to check the pressure
calibration settings.

LT-2320
14
CALIBRATION / TROUBLESHOOTING
a. Close the ball valve so no air ows through.
b. Send the terminal command ‘Pn=0’ to ensure the DV6x device measured pressure is in cmH2O.
c. Use the terminal command ‘Tw=’ to change the motor speed to an arbitrary value, thus changing the DV6x device pressure.
d. Send the terminal command ‘PR’ and verify that the DV6x device returned pressure is equal to the pressure measurement from the
external pressure meter. NOTE: The DV6x device returned pressure is in multiples of 10.
e. Repeat the (Step 9) test for various motor speeds.
Once the DV6x device is calibrated, send the terminal command ‘Mo=0’ to put the device in CPAP mode or ‘Mo=1’ to put the device in AutoAdjust
mode as required.
TROUBLESHOOTING
Symptom Action (for symptoms listed at left, follow the steps listed below)
Blower does not start when powered up
(display may be blank).
or
Unit is dead.
1. Examine the CPAP LCD display for error codes.
a. If error code E01 (on second line)— replace control PC board.
b. If display is blank or shows error codes E02, E07, E08, E09, proceed to next step.
NOTE: Wait at least 20 seconds after applying power for error codes to appear on display.
2. Open unit and verify that all wire harnesses are securely connected.
3a. Measure resistance of PC board fuse F2.
The ohmmeter should indicate a short or 0 ohms. If open, replace the control board.
3b. If reading is zero (0) ohms, check the voltage. It should be: 12 volts (+/- .5 volts) if out of spec or not
present – try another desk top power supply
4. Install a known good blower (remove AC power and reapply) – does the good blower run?
a. Yes – replace the blower, burn in for 6 hours and test unit (subjective sound testing should be
performed).
b. No – replace control board.
Blower does not start when powered up and
display shows E06 error code after a short
time.
1. Open the unit and inspect the air intake lter, intake foam components and any internal connections. Replace
any foam pieces that appear damaged.
2. Check for signs of water damage in the unit (the blower assembly, pressure sensor or ow sensor can be
damaged by water). Replace any components that appear damaged.
3. Verify that the blower halves are properly snapped together. No visible gap should be present between the
top and bottom sections.
4. Recalibrate the pressure and ow sensors using Manual Calibration Procedure.
5. If calibration does not resolve issue, install a known good blower (remove AC power and reapply) – does the
good blower run?
a. Yes – replace the blower, burn in for 6 hours and test unit (subjective sound testing should be
performed).
b. No – replace control board.
Blower runs loud. 1. Open the unit and verify that the blower assembly is properly snapped together. No visible gaps should be
present.
2. Check for correct assembly of the foam, blower and silicone isolator.
3. If the unit assembly is correct, replace the blower, burn in for a minimum 6 hours and test unit (subjective
sound testing should be performed).
Pressure or ow out of tolerance
(Pressure ± 0.5 cmH2Oof setting for Model
(DV63, DV64) (Flow ± 10 L/Min).
OR
Unit not triggering properly.
1. Open the unit and inspect the air intake lter, intake foam components and any internal connections. Verify
the PC Board is inserted into the manifold properly. Replace any foam pieces and/or tubing that appear
damaged.
2. Check for signs of water damage in the unit (the blower assembly, pressure sensor or ow sensor can be
damaged by water). Replace any components that appear damaged.
3. Verify that the blower halves are properly snapped together. No visible gap should be present between the
top and bottom sections.
4. Check the chassis manifold, verify that manifold is aligned on seal surfaces and that the motor wire harness
is routed correctly through the manifold. Replace the chassis manifold if it is damaged.
5. Check pressure and ow after replacing any of the above parts or snapping the blower together. If pressure
and ow are still out of tolerance, go to next step.
6. Calibrate the CPAP using the “Manual Calibration Procedure”.
7. If the above steps do not improve pressure or ow accuracy, replace the control board.

LT-2320
15
TROUBLESHOOTING
Symptom Action (for symptoms listed at left, follow the steps listed below)
Manual calibration failed during testing. 1. Open the unit and inspect the air intake lter and intake foam components. Check for disconnected, occluded
(blocked) or kinked manifold for the ow transducer or manifold for the pressure sensor. Replace any foam
pieces that appear damaged and any manifolds that appear to be blocked.
2. Check for signs of water damage in the unit (the blower assembly, pressure sensor or ow sensor can be
damaged by water). Replace any components that appear damaged.
3. Verify that the blower halves are properly snapped together. No visible gap should be present between the
top and bottom sections.
4. If any changes were made above, calibrate the CPAP using the “Manual Calibration Procedure”.
5. If the above steps do not resolve the calibration problem, replace the control board.
LCD display does not light, backlight not lit
up. (Plug-in start up test)
or
The blower runs, but nothing appears on the
LCD.
1. Open the unit and verify that the LCD connectors are secured (check connectors at the LCD display module
and the control board). Examine the LCD tail for damage or creases from bending and also the tail going to
the Encoder PC board for damage.
2. If connectors are secure, the tail is undamaged and the display still does not function correctly, replace the
LCD display module.
3. If LCD still does not show messages correctly, replace control PC board (re-install the original LCD)
If any keypad button is non-responsive. 1. Remove the keypad and check the carbon ink on the PC board for wear. Also check the Carbon Pills on the
keypad for wear or if missing. Replace either keypad or PC board.
If user claims that keypad buttons did not
work, but buttons work when tested.
1. Check for sticking buttons and wear on either the PC board or the carbon pills on the keypad. Replace PC
board or keypad if necessary.
If Encoder (knob) is nonresponsive 1. Check the tail from the LCD going to the Encoder board and the tail from the LCD going to the main PC
board. If it looks OK, replace the Encoder board. If not, replace the LCD display assembly.
User claims unit is warm. 1. It is normal for the back of the unit to get a little warm when operating and when the blower is off (heat from
power supply).
2. Examine the power supply for any signs of overheating (discolored parts on supply). If needed, replace
power supply.
User claims unit shuts off during night
or
User claims that pressure is high
1. Check the “Last Error” recorded using Terminal Program. Send the terminal command "Er" to check "Last
Error" recorded. An error code of E00 indicates that no errors were encountered in the eld.
a. If no critical errors are present on the device, then the problem may be related to high leak ow operation.
b. Unit calibration may be incorrect. Recalibrate using Manual Calibration Procedure.
Blower continues to run when unit is turned
off.
1. Replace control board.
No airow from unit when blower is running or
air is unusually warm.
1. Air Filter may be occluded or dirty. Clean or replace lter.
2. Check internal air path for components or foam out of place. Replace components as necessary and
reassemble.
Error Code E80. This message is shown once
per blower on.
1. Inadequate Power Supply. Replace Power Supply and start unit again.
Error Code E81. This message is shown once
per blower on.
1. PulseDose failure. Replace PulseDose Valve.
Error Code E82. This message is shown once
per blower on.
1. Heater plate failure. Check the wire harness inside the CPAP for any broken connections or pins in the
connector pushed out.
2. Replace the heater.
Error Code E83. This message is shown once
per blower on.
1. Clock Failure. Real Time Clock is not advancing. Unplug the power and wait a few minutes then plug the
power back in.
2. If Error occurs again replace the PC Board.
Error Code E84. This message is shown once
per blower on.
1. NAND Flash Failure. Unplug the power and wait a few minutes then plug the power back in.
2. If Error occurs again replace the PC Board.
Error Code E0B, error communicating with the
sensors.
1. Sensor failure, replace PC board.
Error Code E0D, Unknown Power Supply. 1. Replace Power Supply and try again.
2. If Unit still Errors, replace the PC Board.
SmartCode or Compliance meter not logging
usage.
1. Both of these features require that breathing detection (triggering) works correctly. Perform Triggering Test to
conrm operation.
2. Perform pressure and ow accuracy tests to conrm calibration.

LT-2320
16
SERVICE
CPAP SERVICING AND PARTS
REPLACEMENT
Tools and Equipment Needed:
• T-10 Torx driver
• Needle nose pliers
• Digital Multimeter for measuring AC/DC voltages and resistance
• AC power source (100 to 240 VAC 50/60 Hz)
Inspecting Internal Components
When servicing or troubleshooting the CPAP, it may be necessary to
closely inspect all of the internal components in order to determine the
cause of the problem or issue. The following steps are provided as a
guide to assist you when performing a detailed inspection or
evaluation of the CPAP.
During service, do not touch the contacts at the end of the ribbon
connector/cable. Grease or oil from your ngers will render the display
inoperative.
Inspecting components in and on the blower
chassis:
1. Remove bottom cover using instructions listed on pg. 17.
2. Inspect the bottom cover foam pieces and mounting bosses for
damage. Replace as needed.
Mounting
Bosses
Mounting
Bosses
Foam
3. Remove blower. See ‘to remove and replace blower’ section.
4. Inspect the blower foam pieces and the blower discharge isolator.
Ensure they are not damaged. Replace as needed.
Blower Isolator
Blower Isolation
Foam
5. Look for evidence of water residue inside the blower housing.
6. Verify that the blower halves are properly snapped together. No
visible gap should be present between the top and bottom
sections. Also inspect the chassis manifold for any damage.
Replace if necessary.
Chassis Manifold
7. Make sure the ow element is positioned properly and not dirty or
damaged.
Flow
Element
Top Blower
Foam
8. Replace blower. See ‘to remove and replace blower’ section.
Inspecting components in and on top of the
main chassis:
1. Remove top cover using instructions listed on pg. 17.
2. Remove PC board. See instructions ‘to remove and replace PC
board’ section.
3. Inspect the LCD display mounting to the front of the chassis and
ensure that it is positioned correctly.
Ribbon
Connectors
LCD Display
& Mount
Isolator
4. Closely inspect both ribbon connectors. Make sure there are no
breaks or nicks in the wire insulation. Also be sure the smaller
ribbon connector is securely attached to the Encoder PC board.
NOTE: During service, do not touch the contacts at the end of
the ribbon connector/cable. Grease or oil from your ngers will
render the display inoperative.
5. Inspect the Encoder PC board for any broken connections
around the stem that the rotary knob plugs onto.
Speaker Wires
Encoder PC Board
6. Inspect the speaker for any broken wires.
7. Remove the keypad from the PC board by gently pulling upward
until the ‘rat tails’ are out of the holes.
Keypad

LT-2320
17
SERVICE
8. Inspect the keypad to be sure all the carbon pills are in place.
Also inspect the carbon traces on the PC board for any breakage
or dirt.
Carbon Traces
X4
Carbon Pills
X4
Rat Tails
X4
9. Replace the keypad by inserting the ‘rat tails’ in the mounting
holes and then pulling them through the PC board with needle
nose pliers.
10. Replace PC board. See ‘to remove and replace PC board’
section.
11. Replace top cover using instructions listed below.
To Remove Bottom Cover – Access the Blower,
Flow Element, Foam and Chassis Manifold
1. Remove the four T-10 screws from the bottom cover.
Case Screws
X4
2. Lift bottom cover off CPAP device.
To Replace Bottom Cover
1. Ensure that the ow element is fully seated in the ow sensor
manifold.
Flow Element
2. Ensure that the foam under and around the blower is properly
placed and free from tears.
Blower Foam
3. Ensure that the blower is securely placed in the blower isolator.
4. Ensure that the blue, green and yellow wire harness is properly
positioned in the chassis manifold, and the manifold is secured to
the main chassis frame.
5. Fold the blue, green and yellow wire harness under its connector
and insert harness wires under the connector when placing into
the connector restraint molded into the main chassis.
Blower Wire Harness in
Connector Restraint
6. Ensure that the heater wire harness connector is in place and all
wires are pushed deep into the cavity.
7. Replace bottom cover and secure using four T-10 screws.
To Remove Top Cover – Access PC Board,
Keypad, Speaker, LCD Display, Encoder PC
Board
1. Remove the two front T-10 screws from the bottom cover, found
under the Display and Rotary Knob.
Case Screws
X2
2. Pull/ Pry off the Rotary Knob.
3. Use a at-head driver to push up on the top cover latches on the
back of the unit.
Latches
4. Lift cover off the main chassis.
To Replace Top Cover
1. Place top cover onto chassis.
2. Snap latches into place on back of unit.
3. Ensure that the Display is positioned properly within the window
while replacing two front T-10 screws into bottom cover.
4. Push Rotary Knob onto stem.

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SERVICE
To Remove and Replace PC Board / Keypad
1. Remove top cover using instructions listed previously.
2. Remove two short T-10 screws from PC board.
Speaker Wire
Connector
PC Board
Screws
3. Carefully remove speaker wire connector from top of PC board
by lifting upwards.
4. Carefully lift front of PC Board to gain access to the LCD
display’s ribbon connector. Ensuring that the ribbon connector is
not bent in the process, disconnect the display connector from
the PC board.
Display Ribbon
Connector
5. Lift PC board out of the main chassis until the main wire harness
connector is accessible.
6. Release main wire harness connector latch and carefully pull
board from connector.
Wire Harness
Connector
7. Remove board from top of chassis.
8. Remove keypad from PC board by carefully pulling upward until
the “rat tails” are out of the holes.
Keypad
9. Position the keypad so that the Ramp key is on the front right of
the new PC Board. Pull the “rat tails” through the corresponding
holes in the new board using needle nose pliers. Ensure that the
“rat tails” are pulled completely through the board with the
keypad ush with the top of the board.
Rat Tails
X4
10. Align the LCD display ribbon connector with the PC board’s
connector and push into place without damaging the ribbon.
PC Board
Connector
Attach Display
Ribbon Connector
Wire Harness
Connector
11. Hold main wire harness connector with both forengers or needle
nose pliers and align with PC board’s connector. Then carefully
push until it snaps into place.
12. Reconnect speaker wire connector to PC board by pushing
straight down (red wire closest to delay button).
Speaker Wire
Connector
13. Ensure PC board is properly positioned on chassis and secure
with two T-10 screws.
14. Replace top cover using instructions listed previously.
NOTE: If a NEW PC board was installed, proceed with the
following steps including recalibration.
The following steps including recalibration are required when
installing a new PC board:
1. Connect the PAP to a PC Serial Port with cable DV63D-615 and
turn the PAP on.
2. Use a terminal program (such as Windows Hyper Terminal or
equivalent) with COM Settings 9600 baud, no parity, 1 stop bit,
Flow Control set to none.
3. When the unit is connected,Type 'Mn<cr>. The PAP will report
the model number saved in memory. It should be "00000" if the
PC Board is new.
4. Read the Model number from the PAP label in the back of the
unit (EX; DV64D)
5. Type 'Mn=nnnnn where nnnnn is the 5 digit model number read
in the previous step. The PAP should return the 5 digit model
Number.
6. Read the Serial Number from the label located on the back of
the unit.

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7. Type 'Sn=nnnnnnnnnn' where nnnnnnnnnn is the 10 digit serial
number read in the previous step.
8. Read the hour meter("Uh<cr>)-a new PC Board should have
000000000.0 hours. It is recommended that the original hour
meter value be restored if the original blower is used. Set the
hour meter by typing 'Uh=nnnn<cr>' where nnnn is the hour
meter reading X10 (Ex: 100.5 hours would be set by typing
'Uh=1005<cr>').
9. Read the Compliance Meter ("Up<cr>")-a new PC board should
have 000000000.0. Clear the Compliance Meter if it is not by
typing 'Up=c<cr>'. The CPAP will return 0000000000.0.
NOTE: SmartCode data will also clear at this time.
10. Check the hardware and rmware version information. Read and
record the following:
a. BIOS rev "VB<cr>"
b. Firmware rev "VF<cr>"
Check the present version of rmware to make sure the board is
up to date. Install new rmware if the board has an old revision.
11. Clear the error code by typing 'Ec<cr>' the PAP will return "OK".
12. Clear the fault log by typing 'Uf=c<cr>'the PAP will return "OK".
13. Set all device settings to their default by typing 'TD<cr>. The PAP
should return "OK".
14. Recalibrate the unit using the Manual Calibration Procedure.
15. After the calibration is complete,close Hyper Terminal and set the
clock. This requires the use of the DeVilbiss Remote Control
Program which is included in SmartLink Desktop Software
version 3.0 or higher. If necessary, install the software at this
time.
16. Connect the PAP to a PC Serial Port with cable DV63D-615. In
order to set the clock,open the DeVilbiss SmartLink Desktop
Software and click on the Remote Control Program. When the
program nds the PAP,click on the clock settings tab. Then click
on the clock in the middle of the screen. When you click this,a
message box will let you know that,by clicking this,all data will
be permanently removed and will ask you if you want to proceed.
By clicking "OK" the clock will be set to your computer time,and
all data will be erased.
17. Close the software and disconnect the unit from the PC.
To Remove and Replace LCD Display, Encoder
PC Board, or Manifolds for Pressure and Flow
Transducers
1. Remove PC Board using instructions listed previously and set
aside PC Board with Keypad attached in a safe, clean location.
2. Use a ngernail to gently pry the LCD Display ribbon connector
from Encoder PC board connection.
Disconnect Display Ribbon
Connector from Encoder PC Board
3. Remove the Display and its silicone display mount isolator.
4. If replacing Encoder PC board, release from the chassis by
carefully pushing on the top latch while lifting the rotary knob
stem up until the board is released. Install new Encoder board by
positioning the board so that the Display’s connector is on top,
aligning the board in the chassis guides and pushing into
position. The top latch will click into place.
Push Latch to Remove
Encoder PC Board
5. If replacing the Display, remove old Display from the silicone
mount isolator and carefully insert new Display ensuring that
neither ribbon connector is bent or damaged in the process.
Silicone Mount Isolator
a. Position the isolator so that the back two plugs align with the
holes in the Display cavity,and the Rotary Knob isolator plug
aligns with the hole to the right of the knob stem. Push the
three plugs into their corresponding holes to attach the
isolator to the main chassis.
Holes for Isolator Plugs X3
b. Attach ribbon connector to the Encoder PC board.
6. If replacing manifolds, pull appropriate silicone manifold from
main chassis.
Pressure Sensor Manifold
Flow Sensor Manifold
a. If replacing the manifold for the pressure sensor, press tall
connector over the larger port in the chassis.

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SERVICE
b. If replacing the manifold for the ow sensor, observe the
ange on the short manifold connectors. These anges must
be pressed into the open space surrounding the ow sensor
connection ports. Position manifold over both ports in the
chassis and press into place at a slight angle using thumbs.
Then, press a thumbnail into and around base of each
manifold until each is fully seated in the chassis. When
looking straight down on the manifold, the manifold openings
should surround the ports at an equal distance.
7. Replace PC Board using instructions listed previously.
8. Replace top cover using instructions listed previously.
To Remove and Replace Blower
1. Remove bottom cover using instructions listed previously.
2. Disconnect blower wire harness connector.
Chassis Manifold
Blower Wire
Harness Connector
3. Remove chassis manifold.
4. Remove the isolation foam around the blower.
Isolation Foam
5. Push the silicone isolator off the blower outlet and remove blower.
6. Ensure that the top blower foam is positioned properly.
Silicone Isolator
Top Blower Foam
7. Insert silicone isolator onto new blower outlet port.
8. Place blower into chassis ensuring that outlet port with isolator is
positioned properly in opening.
9. Insert the blower wrap isolation foam so that the single-notched
end is beside the blower outlet port. Wrap the remaining foam
strip clockwise around the blower so that the notched foam
corresponds to the latches on the blower body and is ON TOP of
the blower wire harness.
Single-Notched
End of Foam
Foam Should be on Top
of Blower Wire Harness
10. Install chassis manifold ensuring that it is seated properly on top
of the chassis frame.
11. Insert the blower wire harness into the notch or cut out in the
chassis manifold and connect it to the main wire harness.
Notch in Chassis
Manifold
Connector Restraint
12. Fold the blue, green and yellow wire harness under its connector
and insert the harness wires and connector into the connector
restraint located to the left of the notch in the silicone manifold.
13. Replace bottom cover using instructions listed previously.
14. If a NEW blower was installed, the unit should be recalibrated
using the Manual Calibration Procedure.