DeVilbiss IntelliPAP DV54 User manual

CA UTION– Federal (U.S.A.) law restricts this
device to sale by, or on the order of a physician.
D e V ilb is s ®In t e lliP A P ™P A P D e v ic e
D e V ilb is s ®S le e p Cu b e ™P A P D e v ic e
Model D V54
Service Manu al

2LT-20 2 7

3
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EN Tab le o f C o n te n ts
1. General Information ......................................... 4
A. Safeguards............................................................ 4
B. Initial Inspection ................................................... 4
C. T ravel ................................................................... 5
D. DC Power ........................................................... 5
E. Setting Pressures and Features ............................ 5
F. Images: DeVilbiss DV54 PAP................................. 5
2. Description of Normal Operation .................... 6
3. Cleaning and Disinfecting ................................. 7
A. R outine Cleaning--Patient .................................... 7
B. Disinfecting .......................................................... 7
4. Maintenance...................................................... 10
A. Initial Inspection—Equipment Provider .............. 10
B. R outine Maintenance—Patient ............................ 10
C. R equired 2-year Maintenance—
Equipment Provider ......................................... 10
5. Testing ............................................................... 11
A. Pressure Accuracy T est ........................................ 11
B. Flow Accuracy T est .............................................. 11
C. K eypad T est ......................................................... 12
D. Auto-ON / Auto-OFF T est.................................. 12
E. Backlight T est for LCD and K eypad ..................... 12
6. Alerts and Device Faults................................... 13
A. Alerts Visible to Patients ...................................... 13
B. Device Faults Visible to Patients ......................... 13
C. R eading and Clearing the Last Device Fault Code 13
7. Calibration......................................................... 14
A. Manual Calibration............................................... 14
B. Calibration Errors ................................................ 15
C. Auto-Calibration ................................................. 15
D. Details on T c Serial Command............................ 15
8. Troubleshooting ................................................ 16
9. Service Instructions .......................................... 18
A. Cover R emoval ................................................... 18
B. Cover R eplacement ............................................. 18
C. Control PC Board R emoval................................. 18
D. Control PC Board R eplacement.......................... 19
E. Power Supply Board R emoval.............................. 20
F. Power Supply Board R eplacement........................ 20
G. Blower R emoval .................................................. 21
H. Blower R eplacement ........................................... 21
I. K eyPad & LCD Display R emoval and R eplacement......... 22
J. Firmware installation............................................. 22
10. Unit Specifications ............................................ 23
11. General Information- DV5HH .......................... 24
A. Safeguards............................................................ 24
B. T ravel.................................................................... 24
C. DC Power ........................................................... 24
D. Product Description ............................................ 24
12. Description of Normal Operation- DV5HH..... 25
13. Maintenance and Testing- DV5HH................... 26
A. Cleaning and Disinfection .................................... 26
B. Maintenance......................................................... 26
C. T esting.................................................................. 26
14. Troubleshooting- DV5HH.................................. 27
15. Service Instructions- DV5HH........................... 28
A. R emoving the DV5HH base cover....................... 28
B. R eplacing the DV5HH base cover........................ 28
C. R emoving and replacing silicone manifold................ 29
D. R emoving and replacing the latch........................ 29
16. Unit Specifications- DV5HH............................. 30
17. Ordering and R eturning Parts.......................... 31
A. Ordering Non-W arranty R eplacement Parts ....... 31
B. Ordering W arranty R eplacement Parts ............... 31
C. R eturning W arranty Defective Parts .................... 31
D. Placing orders...................................................... 31
18. Parts List ........................................................... 32
19. W arranties......................................................... 33

4LT-2 027
EN 1 . G e ne ral In form at ion
A. SAFEGU ARDS
When servicing electrical products, basic safety precautions
should always be followed. Important safety information in
this manual is highlighted by the following terms.
DANGER: Urgent safety information for hazards that
will cause serious injury or death.
WARNING: Important safety information for hazards
that might cause serious injury.
CAUTION: Information for preventing damage to the
product.
NOTE: Information to which you should pay
special attention.
PLEASE READ ALL INSTRUCTIONS
BEFORE USING THIS DEVICE.
DANGER!
•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 enclosure. There are no
user-serviceable internal components. If service is
required, return the product to your home care
provider. Opening or tampering with the product will
void the warranty.
WARNING!
• The DeVilbiss IntelliPAP™ and SleepCube™ should be
used only with masks recommended by DeVilbiss, your
physician or respiratory therapist.
• To avoid rebreathing of exhaled air, do not use a CPAP
mask unless the device is turned on and providing a sup-
ply 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 fl 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 DeVilbiss IntelliPAP and SleepCube devices
are not life support devices 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 performing
cleaning.
• Use only accessories recommended by DeVilbiss.
CAUTION– The circular data port connector located on
the back of the is used to attach accessories to the
device. The connector must only be used with acces-
sories approved for use by DeVilbiss. Do not attempt
to attach any other device to this connector as it may
damage the CPAP or the accessory device.
CAUTION– Never rinse or place the device in water. Never
allow liquids to get into or around any of the ports,
switches or air fi lter; doing so will result in device
damage. If this occurs, discontinue use and remove
the power cord from the power source. Allow the
device to completely dry before use.
CAUTION– Do not place the IntelliPAP or SleepCube device
where it can be bumped onto the fl oor or where the
power cord may create a trip hazard.
CAUTION– Only the DeVilbiss DV5 series Heated Hu-
midifi er system is recommended for use with the
IntelliPAP and SleepCube devices. Other humidifi er
systems may prevent the device from detecting snor-
ing and may cause inappropriate pressure levels in
the mask.
CAUTION– Oxygen is a prescription gas and should only be
administered under the supervision of a physician.
B. INITIAL INSPECTION
DeVilbiss recommends equipment inspection upon delivery
RPower up the DV54 PAP using AC power.
RTest pressure accuracy using an outlet cap (DV51D-
620), a calibrated pressure gauge and the procedures
listed under Pressure Accuracy Test.
RTest the keys on the keypad using the procedures
listed under Keypad Test.

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1.
C. TRAVEL
The DeVilbiss DV54 PAP
• Automatically adjusts for altitudes between sea level
and 9000 ft (2750 m)
• Automatically accepts line voltages of 100-240 V,
50/60 Hz
• Needs power cord appropriate for area
o USA DV51D-606
o Europe, except UK DV51D-607
o UK DV51D-608
o Australia DV51D-609
o Set of 3 (UK, Europe, Australia) DV51D-611
D. DC POWER
The DeVilbiss DV54 PAP
• Automatically accepts 12V DC power
• Operates on DC power only if AC power is not
present
• Operates on AC power if both DC and AC power
are present
• Optional 12V, 60 amp hour, deep cycle marine battery
• Optional DC to AC inverter:
minimum 200 watts @ 100/120 VAC
minimum 400 watts @ 220 VAC
• Needs appropriate DC power cord
o DV51D-619 DC accessory cable for DC plug-in
adapters
o DV51D-696 DC battery clamp-on adaptor for
stand-alone battery
E. SETTING PRESSURES AND FEATURES
Use the following steps to enter Clinical/Setup mode:
1. Apply AC power to the unit
2. Verify that LCD displays OFF
3. Press and hold the Down Arrow key and the Delay
key.
4. While holding two keys, press the ON/OFF key.
5. The blower will begin operating and the LCD will
display ‘Clinical Menu’.
6. Use the Left and Right Arrow keys to scroll through
the options
7. Use the Up and Down Arrow keys to select the
option’s value.
8. Press the ON/OFF key at any time to exit Clinical Mode.
F. IMAGES: DEVILBISS DV54 PAP
Figures A and B:
DV54 Device Back and Bottom Views
1. Air supply port
on back of
device
2. Air supply port
on bottom of
device
(for optional
humidifier)
3. Air supply port
plug
4. Heater power
connector
(for optional
humidifier)
5. AC power
connector
6. DC power
connector
7. Data port
8. Air inlet filter
opening
Figure C: Keypad
1. ON/OFF
2. Previous item
3. Next item
4. Delay
5. Decrease value
6. Increase value
7. Heater power
LED
(for optional
humidifier)
B2
4
A1
3
5 6 7
8
C
5
1
2
4
6
3
7

6LT-2027
EN
An AC line cord (100-240 VAC, 50/60 Hz) or a DC line cord (12 VDC) supplies electrical
power to the DV54 PAP. The PAP converts the AC input voltage to DC voltage by means
of an internal switch mode power supply and uses the DC voltage to power the internal
electronics of the unit, such as microcontroller, motor control circuitry, blower, LCD
display, etc. NOTE: The heated humidifier will not operate when the PAP uses external
DC power.
The PAP produces positive pressure by spinning a reverse-curved impeller with a brush-
less DC motor. Room air is drawn through a filter into the blower, pressurized in the
blower, optionally passed through a heated humidifier chamber, and then discharged
through a 22mm-ID, smooth-bore tube. Pressure regulation is achieved using measured
pressure and flow as feedback.
The DV54 PAP senses patient breathing by monitoring the flow transducer signal which
detects the fluctuations caused by inhalation and exhalation. The flow transducer signal also
triggers mask-OFF alerts and auto-ON / auto-OFF functionality.
In AutoAdjust mode, the DV54 software analyzes the flow transducer signal to detect
respiratory events such as apneas, hypopneas, mixed apneas, snoring, and exhale puff-
ing as defined by programmable settings. An onboard algorithm evaluates the detected
respiratory events and adjusts the pressure as follows: The DV54 PAP increases output
pressure when it detects apneas, hypopneas, and snoring events; it maintains pressure
when it detects mixed events; and it decreases pressure on a regular timed interval as
the number of recent respiratory events decreases.
2. D escrip tion of N ormal O p eration

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EN
A. ROUTINE CLEANING--PATIENT
• Unplug the DV54 PAP and wipe enclosure with a clean, damp cloth every few
days to keep dust free. Allow the device to dry completely before returning to
power source.
• Check the air-inlet filter every 10 days. Wash the dark outer foam filter in a solu-
tion of warm water and mild detergent. Rinse with water. Allow the filter to dry
completely before returning to the device.
• Check the optional fine particle filter every 10 days and replace if dirty or damaged.
• 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 de-
tergent. Rinse with water and allow to air dry before replacing device and mask.
• Clean the mask and headgear according to the manufacturer’s instructions.
B. DISINFECTING
CAUTION– Always work in an ESD (electro static discharge) safe environment when as-
sembling or disassembling electronic components.
NOTE– DeVilbiss does not require disinfection as part of unit maintenance. If disinfection
is desired, the following procedure is recommended.
NOTE– Parts needed to perform the disinfection procedure are NOT covered under the
DV54 PAP warranty as listed in this manual.
NOTE– Follow manufacturer’s instructions for cleaning and disinfection solutions.
NOTE– Disinfection requires the following parts sold in Disinfection Kit, DV51D-682.
• Blower assembly, balanced
• Blower isolator-silicone
• Grommet-silicone
• 1/4 inch blower wrap foam
• 3 1/2 inch silicone tubing
• Air-inlet filter
• 5 1/2 inch silicone tubing
• Tubing/Humidifier air supply support plug
• 1/2 inch blower mount foam-round
• 1/2 inch top blower foam
• 1/8 inch inside bottom cover foam
• 5 inch silicone tubing
• Fine particle filter (optional)
3. Cleaning and Disinfecting

8LT-2 027
Disinfection Procedure for the
DV Series PAP
1. Make certain that the device is not connected to a power source.
2. Dispose of the mask, headgear, air supply tubing, gray air inlet filter and white fine
particle filter, if applicable.
3. Place the unit, top side down, onto a clean work surface. Remove the four (4)
screws from the bottom cover and remove the bottom cover from the unit.
(Fig. 1)
4. Remove the black 1/8 inch inside bottom cover foam from the bottom cover as-
sembly and discard. This foam may stick to the chassis of the main unit. (Fig. 2)
5. Remove the black 1/2 inch top blower foam from the chassis assembly and
discard.
6. Turn the unit top side up and remove the top cover.
7. Using a T-15 driver, remove the screw holding the PC board to the chassis.
(Fig. 3)
8. Disconnect the 8-conductor blower wire harness from the underside of the PC
board. (Fig. 4)
9. Disconnect the three (3) pieces of tubing and discard. (Fig. 5)
NOTE– Pull the tubing straight off the connectors to prevent damaging the chassis.
10. With the ports side of the chassis toward you, tilt the PC board and its respec-
tive wire harnesses upward, and remove the wire connections. Lift the PC board
slowly so that you can assist any wires that may become hung up on the chassis or
power supply. (Fig. 6)
3.
2
3
5
1
4
6

9
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11. Remove the grommet that seals the blower’s wire harness. (Fig. 7)
12. Remove the heater wire harness connector from the bottom of the chassis by
sliding the connector outward while pulling the top retaining tab upward slightly.
(Fig. 8)
13. Remove the 1/4” blower wrap foam, the blower, and the silicone isolator from
the underside of the chassis.
14. Carefully spray, wipe or soak the air intake, flow path and blower chassis inside
and outside using a 2% glutaraldehyde solution.
15. Wipe the power cord and the outside of both halves of the PAP case with the
same solution.
16. Let all components fully dry.
17. Reassemble the unit using parts from the Disinfection Kit—DV51D-682.
NOTES:
• Route the silicone tubing correctly, as shown, and ensure that there are no
kinks. (Fig. 9)
• Ensure that the silicone isolator is fully seated in the chassis and the blower.
• Ensure that the grommet is fully seated around the blower wire harness.
• Route the wire harnesses properly, using the provided strain reliefs on the chassis.
(Fig. 11)
• Secure the power supply board within the mount clips on the chassis before
replacing the unit covers. (Fig. 10)
3.
7
8
9
10
11

10 LT- 2 027
EN 4. M aintena nce
A. INITIAL INSPECTION—EQ UIPMENT PROVIDER
DeVilbiss recommends equipment inspection upon delivery
RPower up the DV54 PAP using AC power.
RTest pressure accuracy using an outlet cap (DV51D-620), a calibrated pressure
gauge and the procedures listed under Pressure Accuracy Test.
RTest the keys on the keypad using the procedures listed under Keypad Test.
B. ROUTINE MAINTENANCE—PATIENT
RWipe case with damp cloth every few days
RCheck air-inlet filter every 10 days and clean as needed
RClean air supply tubing daily
RClean mask and headgear per manufacturer’s instructions.
C. REQ UIRED 2-YEAR MAINTENANCE—
EQ UIPMENT PROVIDER
DeVilbiss requires the following maintenance from the equipment provider:
RTest pressure accuracy using procedures listed under Pressure Accuracy Test. If
the device is out of calibration, follow corrective procedures as listed.
RInstruct patient on filter maintenance described in Instruction Guide:
Standard Filter Optional Fine Particle Filter
o Inspect filter every ten days o Inspect filter every ten days
o Clean as needed o Replace if dirty
o Change every 6 months o Change every 30 days
ROptional: Test flow accuracy using procedures listed under Flow Accuracy Test.

11
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EN
The following test procedures verify correct operation of the
DV54 PAP and should be performed on all repaired units.
NOTE– Verify that the DV54 PAP contains the latest firm-
ware release before conducting maintenance or
repairs. Go to http://www.devilbisshealthcare.com/
Products to download the latest firmware update.
Download and installation instructions are provided
on the web site.
A. PRESSURE ACCURACY TEST
Additional equipment required: outlet cap (DV51D-620), a
calibrated pressure gauge (0-30 cmH2O, accuracy ±0.25
cmH2O)
1. Connect the pressure gauge to the unit outlet port.
2. Apply AC power to the unit. If the blower is running,
press the ON/OFF key on the keypad so that the
blower stops and the LCD displays ‘OFF’.
3. While pressing both the Down Arrow and Delay
keys, press the ON/OFF key to start the blower and
enter clinical mode.
4. Press the Next Item (right arrow) key to move to the
Operating Mode screen. Use the Up Arrow or Down
Arrow keys to place the unit in CPAP mode.
5. Press the Next Item key until Set Pressure is dis-
played. Use the Up and Down Arrow keys to adjust
the pressure to 12 cmH2O. Wait at least 30 seconds
for the pressure to stabilize.
6. Verify that the displayed pressure matches the pres-
sure measured on the gauge (pressure setting ±0.5
cmH2O). Accuracy at other pressure settings can be
checked if needed.
7. If the pressure is out of calibration, turn the blower
OFF for approximately 1 minute to allow auto-calibra-
tion to occur. Turn the blower back ON and allow 30
seconds for the pressure to stabilize. If the pressure is
still out of calibration, perform a full calibration using
the Manual Calibration Procedure.
8. If manual calibration does not improve pressure ac-
curacy, there may be a problem with the flow path or
control board. Refer to Troubleshooting.
5. Testing
B. FLOW ACCURACY TEST
Additional equipment required: PAP to PC cable (DV51D-
615), a calibrated volumetric mass flow meter (range 0 to150
L/Min, accuracy ± 3 L/Min), a flow control valve #DV51D-
621 (or equivalent) to adjust flow, and a terminal program
(Microsoft Windows HyperTerminal or equivalent).
1. Perform pressure accuracy test first to ensure that
pressure is correct.
2. Connect the volumetric mass flow meter and flow
control valve to the unit outlet port and close the
valve.
3. Apply AC power to the unit and connect the unit to
the terminal program via the PAP to PC cable.
4. If the blower is running, press the ON/OFF key on
the keypad so that the blower stops and the LCD
displays ‘OFF’.
5. While pressing both the Down Arrow and Delay
keys, press the ON/OFF key to start the blower and
enter clinical mode.
6. Press the Next Item (right arrow) key to move to the
Operating Mode screen. Use the Up Arrow or Down
Arrow keys to place the unit in CPAP mode.
7. Press the Next Item key until Set Pressure is dis-
played. Use the Up and Down Arrow keys to adjust
the pressure to 12 cmH2O. Wait at least 30 seconds
for the pressure to stabilize.
8. Adjust the flow control valve to achieve 60 lpm on
the flow meter. Wait at least 30 seconds for the flow
to stabilize.
9. Verify that the leak flow (terminal command: Fl)
matches the flow meter reading (set value ±10 lpm).
Accuracy at other flow settings can be checked if
needed.
10. If the flow is out of calibration, turn the blower OFF
for approximately 1 minute to allow auto-calibration
to occur. Turn the blower back ON and allow 30 sec-
onds for the pressure and flow to stabilize. If the flow
is still out of calibration, perform a full calibration using
the Manual Calibration Procedure.
11. If manual calibration does not improve flow accuracy,
there may be a problem with the flow path or con-
trol board. Refer to Troubleshooting.

12 LT- 2 027
C. KEYPAD TEST
No additional equipment required.
1. Apply AC power to the unit. If the blower is running,
press the ON/OFF key on the keypad so that the
blower stops and the LCD displays ‘OFF’.
2. While pressing both the Down Arrow and Delay
keys, press the ON/OFF key to start the blower and
enter clinical mode.
3. Press the Next Item key until Delay Time is shown
on the LCD display.
4. Note the Delay Time; then change it by pressing the
Up and Down arrow keys. Use the arrows keys to
return the Delay Time back to the original setting.
5. Use the Previous Item key to return to the Set Pres-
sure screen.
6. If any of the keypad keys did not function correctly
during this test, replace the PC control board using
Service Instructions.
D. AUTO-ON / AUTO-OFF TEST
Additional equipment required: 6 ft x 22 mm smooth bore
tubing.
1. Apply AC power to the unit. If the blower is running,
press the ON/OFF key on the keypad so that the
blower stops and the LCD displays ‘OFF’.
2. While pressing both the Down Arrow and Delay
keys, press the ON/OFF key to start the blower and
enter clinical mode.
3. Press the Next Item key until Enable Menu is dis-
played, and then press the Down Arrow key to enter
the sub-menu.
4. Press the Next Item key until the Auto-ON setting
is displayed. Use the Up or Down Arrow keys to set
the value to Enabled.
5. Press the Next Item key until the Auto-OFF setting
is displayed. Use the Up or Down Arrow keys to set
the value to Enabled.
6. Press the ON/OFF key on the keypad so that the
blower stops and OFF is displayed on the LCD.
7. Connect the 6 ft x 22 mm smooth bore tubing to the
CPAP and block the airflow with your hand or a plug.
8. Turn the blower ON by pressing the ON/OFF key on
the keypad.
9. Keep the airflow blocked for two minutes. Verify that
the blower continues running and no mask alerts ap-
pear.
10. Unblock the smooth bore tubing to open the unit’s
airflow.
11. Verify that after approximately 10 seconds the LCD
5.
shows ‘Mask OFF’. If the mask alert did not appear,
go to step 14.
12. After another 20 seconds the blower should turn
OFF via the Auto-OFF feature. Wait approximately
two minutes after the blower turns OFF. Verify that
the blower does not turn back ON without breathing
present.
13. Tap the palm of your hand on and off the end of the
smooth bore tubing to simulate breathing and verify that
the blower turns ON via the Auto-ON feature.
14. If any of the Auto-OFF or Auto-ON features do not
work correctly, perform a full calibration using the
Manual Calibration Procedure.
E. BACKLIGHT TEST FOR LCD AND
KEYPAD
No additional equipment required.
1. Apply AC power to the unit. If the blower is running,
press the ON/OFF key on the keypad so that the
blower stops and the LCD displays OFF.
2. Press the ON/OFF key and verify that the LCD and
keypad backlight are lit.
3. Wait one minute and verify that the LCD and keypad
backlights reduce intensity.
4. Press any keypad key, except ON/OFF, and verify
that the LCD and keypad backlights return to full
intensity.
5. If the LCD or keypad backlights did not function
correctly during this test, replace the LCD, keypad
and/or PC control board.

13
LT-2 027
EN 6. A l er ts a nd D evi ce Fa u l ts
A. ALERTS VISIBLE TO PATIENTS
Alert Description
Delay running
XX minutes left
Comfort Delay is active
Mask leak = XX%. Check
fit.
High airflow for at least 10%
of previous use time (Poor
mask fit) (actual percentage
is listed)
Mask off. Please check
mask fit.
High airflow during use
(Poor mask fit or mask
removed)
Device Fault E0X. Call
provider.
Device error (See next
table.)
B. DEVICE FAULTS VISIBLE TO PATIENTS
Only device faults classified as critical are visible to the patient
on the LCD display. These faults can be corrected by a service
technician.
Device
Fault
Description
E01 Read Setting Error. Stored prescription
settings are corrupted. Unit is in fail-safe state
(blower off) when this error displays. See
Troubleshooting and Service Instructions to
correct fault, or return unit for repair.
E03 Motor Error. Unit attempts to drive the
motor, but the blower is not spinning (zero
motor speed). See Troubleshooting and Service
Instructions to correct fault, or return unit for
repair.
E04 Locked Rotor Error. Average motor speed is
low, while the motor current is high, for several
seconds. See Troubleshooting and Service
Instructions to correct fault, or return unit for
repair.
E06 Motor Runaway Error. Motor speed is high
and the pressure and total flow are low (close
to zero) for a fixed period of time. See Trouble-
shooting and Service Instructions to correct
fault, or return unit for repair.
E07 Motor Fault Error. The motor control chip
fault output goes active low for a fixed pe-
riod of time. See Troubleshooting and Service
Instructions to correct fault, or return unit for
repair.
C. READING AND CLEARING THE LAST
DEVICE FAULT CODE
NOTE– The last device fault code is stored in EEPROM to
assist in field service of the unit.
Additional equipment: IBM or Compatible PC with a free se-
rial port, PAP to PC cable (DV51D-615), a terminal program
(Microsoft Windows HyperTerminal or equivalent).
1. Connect the DV54 PAP to the PC serial port with
PAP to PC cable.
2. Apply AC power to the unit. If the blower is running,
press the ON/OFF key on the keypad so that the
blower stops and the LCD displays ‘OFF’.
3. Use a terminal program (such as Windows HyperTer-
minal, or equivalent) with COM settings 9600 baud,
no parity, 8 data bits, 1 stop bit, and Flow Control set
to none.
4. When connection is established with the PAP, the
terminal program will show: ‘RH;’ every 0.5 seconds.
This display indicates that the PAP is waiting for a
handshake.
5. Type ‘rh’ (all commands are case sensitive) and press
Enter. The PAP should respond with the firmware
version in the form “V0.XX mm/dd/yyyy.”
Repeat this step if necessary to complete the hand-
shake.
6. Request the last alert code and date by typing ‘El’
and pressing Enter. The return value will be in the
form ‘Exx dd/mm/yyyy’. Exx is the alert code and
dd/mm/yyyy is the date the error occurred.
7. Clear the last alert code by typing ‘Ec’ and pressing
Enter. The PAP will respond with ‘OK’.

14 LT-2 027
EN
A. MANUAL CALIBRATION
DeVilbiss recommends calibrating the DV54 PAP if replacing the PC
control board or when testing or troubleshooting indicate calibration
is required. The manual calibration procedure accesses a terminal
program via the unit’s communication port to calibrate the internal
pressure sensor, flow conditioning circuitry, and the motor current
circuitry. Progress and confirmation messages display on the terminal
screen throughout the procedure. If a failure occurs during calibra-
tion, the error displays as well. See Calibration Errors below.
Additional equipment: IBM or Compatible PC with a free serial
port, PAP to PC cable (DV51D-615), a terminal program (Mi-
crosoft Windows HyperTerminal or equivalent) and a calibrated
pressure gauge (0 to 30 cmH2O), a calibrated volumetric flow
meter (0 to 150 lpm) and a ball valve or equivalent to adjust the
PAP flow.
Please read all steps before beginning this process.
NOTE– Details on the Tc serial commands used in this proce-
dure are listed in Section D.
1. Use the PAP to PC cable to connect the DV54 PAP
to a PC serial port and apply AC power to the PAP.
2. Use a terminal program (such as Windows HyperTer-
minal, or equivalent) with COM settings 9600 baud,
no parity, 8 data bits, 1 stop bit, Flow Control set to
none.
3. When connection is established with the PAP, the
terminal program will show: ‘RH;’ every 0.5 seconds.
This display indicates that the PAP is waiting for a
handshake.
4. Type ‘rh’ (all DV54 commands are case sensitive)
and press ENTER. The PAP will respond with the
firmware version in the form ‘V0.XX dd/mm/
yyyy’. Repeat this step if necessary to complete the
handshake.
5. Start the calibration process by typing ‘Tc=s’ and
pressing ENTER. The PAP will respond with ‘Cali-
bration Started’. If the unit responds with
‘WF’, resend the ‘Tc=s’ command.
6. The PAP will begin sending messages and prompting
for responses to complete the calibration. NOTE: If
a calibration failure is encountered at any stage dur-
ing the procedure, the PAP will respond with ‘Cal
failed: EXX’, where XX is a two digit error code.
a. PAP sends ‘Waiting for blower to
stop spinning’.
7. Cal ibrat i on
b. PAP sends ‘Cal press offset’ when spin-
ning is stopped.
During this stage of the procedure the PAP stops
the blower and saves the pressure sensor and
motor current offsets and adjusts the flow bal-
ance digital potentiometer. After a short delay,
the PAP increases the pressure to approximately
20 cmH2O.
c. PAP sends ‘Set pressure to 20 cmH2O
using Tw+, Tw-, or Tw=’ ‘Send Tc=y
when ready’
d. Connect the pressure gauge to the PAP outlet
(the outlet should be in a deadhead or zero flow
condition) and, using the computer keyboard
(‘Tw+’ followed by ENTER increases the pres-
sure and ‘Tw-’ followed by ENTER decreases
the pressure), adjust the PAP pressure to 20
cmH2O (± 0.1 cmH2O), then type ‘Tc=y’ fol-
lowed by ENTER.
e. PAP sends ‘Reading and saving pressure hi cal’
after confirming that the pressure is correct.
During this stage of the procedure, the PAP cali-
brates the pressure sensor by reading and saving
the high pressure calibration value.
NOTE– As an alternative to steps d and e, the current PAP
pressure gauge reading can be sent to the PAP from
the terminal. Perform the following steps for this op-
tion.
Use the ‘Tw+’, ‘Tw-’, or ‘Tw=X’ (where Xis a number
between 0 and 1023 to adjust the pressure to a value
between 15 and 30 cmH2O. If the pressure is already
within this range no adjustment is needed. NOTE: A
more accurate calibration will be obtained, if the value
is close to 20 cmH2O.
7. Send the pressure to the PAP in the format
‘Tc=yxxxxx’, where xxxxx is the gauge pressure in
cmH2O multiplied by 1000 (Example: 20 cmH2O is
sent as ‘Tc=y20000’.)
8. Connect a calibrated flow meter to the PAP and use
a ball valve (or equivalent) to adjust the volumetric
flow to 110 lpm (+/- 1 lpm),.
9. After a short delay, the PAP will respond with ‘Set
flow to 110 lpm’ and ‘type Tc=y when
ready’. Press Enter after receiving those messages.
10. After a short delay the PAP will respond with ‘cal
successful’. Calibration is now complete. Please
check PAP pressure and flow for accuracy.

15
LT-2 027
B. CALIBRATION ERRORS
Code Description
E95 Calibrate Motor Stop Error. The blower did not
stop during device calibration. This error only oc-
curs during the calibration procedure.
E96 Calibrate Flow Balance Error. The flow balance
digital potentiometer did not adjust during device
calibration. This error only occurs during the cali-
bration procedure.
E97 Calibrate Flow Gain Error. The flow gain digital poten-
tiometer did not adjust during device calibration. This
error only occurs during the calibration procedure.
C. AUTO-CALIBRATION
The DV54 PAP automatically adjusts calibration to maintain
accuracy over time and under varying operating conditions.
Each time the blower is turned OFF, the PC control board
reads and saves the offset voltages from the pressure trans-
ducer and the flow transducer. The PAP uses these voltages to
maintain calibration accuracy as the unit is used over time.
D. DETAILS ON TC SERIAL COMMAND
Tc serial commands are used in the manual calibration proce-
dure listed in Section A. The ‘Tc’ command on the terminal
program reads the unit’s current calibration values, starts the
calibration procedure, and handles user feedback during the
calibration process. Refer to the manual calibration procedure
for details on the calibration process.
• Sending ‘Tc=s’ to the PAP starts the calibration pro-
cess.
• Sending ‘Tc’ without a modifier requests the current
calibration values. A comma-separated list of all cal
values is returned.
Comma-separated response to ‘Tc’ with no modifier:
llll,hhhh,mmmm< cr>
o llll is the pressure low cal (sensor offset). Convert
to voltage by dividing by 1024 and multiplying by 5.
o hhhh is the pressure high cal (sensor output at 20
cmH2O). Convert to VDC by dividing by 1024
and multiplying by 5.
o mmmm is the motor current calibration
(adc offset)
• Feedback is provided to the calibration task by sending
‘Tc=y’ when prompted.
7.

16 LT-2027
EN
Symptom Action (for symptoms listed at left, follow the steps listed below)
Blower does
not start when
powered up
1. Remove the cover. See Service Instructions.
2. Search for disconnected wire harnesses and reconnect, if
needed.
3. Determine if fuses are open.
Measures voltages on both sides of the F1 fuse. If 12 +/-.5 VDC
is not present on both sides of the fuse, the fuse is open and the
power supply board should be replaced. See Service Instruc-
tions.
Measure resistances, without AC power to unit, on the F2 and
F3 fuses with an ohmmeter. If either fuse is open, replace the PC
control board. See Service Instructions.
4. If all fuses are closed, install a blower known to operate properly,
see Service Instructions, and power up the unit.
If the new blower operates properly, replace the old blower.
If the new blower does not operate properly, replace the control
board. See Service Instructions.
5. Replace the cover. See Service Instructions.
E03, E04, or
E07 errors
display
OR display
is blank
E01 error code
displays
Replace the control board
Blower is loud 1. Remove the cover and control board. See Service Instructions.
2. Inspect the assembly of the foam, blower, and silicone isolator.
See Blower Replacement instructions for correct placement.
3. Inspect the blower for visible space between the blower halves
and press halves back together, if needed.
4. If the assembly is not correct, reassemble the components.
5. If assembly is correct, replace the blower. See Service Instruc-
tions.
6. Replace the control board and cover. See Service Instructions.
Blower does
not start when
powered up
and E06 error
displays
1. Remove the cover. See Service Instructions.
2. Search for disconnected, occluded, or kinked tubing on the pres-
sure sensor, flow sensor, and chassis. Correct any issues.
3. Search for damage to the chassis, any foam pieces, and/or tubing
and replace the component, if damaged.
4. Remove the control board. See Service Instructions.
5. Search for signs of water damage to the blower assembly, pres-
sure sensor, and/or flow sensor and replace, if damaged.
6. Inspect the blower. If a space is visible between the top and bot-
tom sections, re-connect the halves to eliminate the space.
7. Re-calibrate the pressure and flow sensors.
8. If the above steps did not eliminate the error, replace the control
board. See Service Instructions.
9. Replace cover. See Service Instructions.
8. Troublesh ooting

17
LT-2 027
Symptom Action (for symptoms listed at left, follow the steps listed below)
Pressure or
flow out of
tolerance
(Pressure ±
0.5 cmH2O of
setting)
(Flow ± 10
L/Min)
1. Remove the cover. See Service Instructions.
2. Search for disconnected, occluded, or kinked tubing on the pres-
sure sensor or chassis. Correct any issues.
3. Search for damage to any foam pieces and/or tubing and replace
the component, if damaged.
4. Remove the control board. See Service Instructions.
5. Search for signs of water damage to the blower assembly, pres-
sure sensor, and flow sensor and replace the component, if dam-
aged.
6. Inspect the blower. If a space is visible between the top and bot-
tom sections, press the halves together to eliminate the space.
7. Repeat the pressure and flow accuracy tests.
8. If the pressure or flow remains out of tolerance, re-calibrate the
unit. See Service Instructions.
9. If the pressure remains out of tolerance, replace the control
board. See Service Instructions.
10. Replace cover. See Service Instructions.
Calibration
failure–
Error codes
E95, E96, E97,
E98
Display on ter-
minal program
during
calibration.
1. Remove the cover. See Service Instructions.
2. Search for damage, and/or loose connections, on the air intake
filter, intake foam components, and all internal tubing and replace
or reconnect components, if needed. Search for disconnected,
occluded, or kinked tubing on the pressure sensor, flow sensor,
or chassis and reconnect or replace tubing, if needed.
3. Remove the control board. See Service Instructions.
4. Search for signs of water damage to the blower assembly, pres-
sure sensor, and flow sensor and replace, if damaged.
5. Inspect the blower. If a space is visible between the top and bot-
tom sections, press the halves to eliminate the space.
6. Repeat Manual Calibration Procedure.
7. If the error codes are not resolved, replace the control board.
See Service Instructions.
8. Replace the cover. See Service Instructions.
8.

18 LT- 2 027
EN
NOTE– After performing any service on the DV54 PAP, please test the unit to ensure
proper operation and calibrate, if necessary.
A. COVER REMOVAL
CAUTION– Failure to wear anti-static equipment during service may damage
this device.
1. If using a DV5HH, remove the heated humidifier and unplug the tubing/humidi-
fier air supply port plug from the back of the cover and re-plug it in the outlet
on the bottom cover.
2. Position the PAP on a clean, flat surface with the keypad facing down.
3. Remove four T-20 screws from the bottom cover.
4. Lift the bottom cover straight up off the top cover.
NOTE– Attempting to reorient the PAP in order to lift the top cover, instead of the bot-
tom cover, may damage this device.
5. Wearing an anti-static device, carefully lift the chassis off the top cover.
B. COVER REPLACEMENT
CAUTION– Failure to wear anti-static equipment during service may damage
this device.
1. Wearing an anti-static device, search for and connect all loose wire harnesses.
2. Place the chassis into the top cover, with the keyboard facing the cover and fit-
ting the control board around the screw posts in the cover.
3. Connect all tubing, carefully creating the correct loops and eliminating any kink-
ing. (Fig. 1)
4. With the 1/8 inch inside bottom cover foam oriented correctly and lying flat,
place the bottom cover over the chassis and onto the top cover, fitting the
screw posts into proper alignment with the chassis and moving any protruding
wire harnesses and tubing away from the edges of the cover.
5. Replace four T-20 screws.
C. CONTROL PC BOARD REMOVAL
CAUTION– Failure to wear anti-static equipment during service may damage
this device.
1. Remove the cover. See instructions above.
2. Wearing an anti-static device, lift the cover off the chassis and place it, with the con-
trol board facing up and the blower facing down, onto a clean flat surface.
3. Disconnect the three pieces of tubing from the outlet port side of the chassis.
4. Disconnect accessible wire harnesses: one behind and one to the left of the tub-
ing in step 3, one at the right corner under the keypad, and one on the outside
of the power supply board.
5. Remove one T-15 screw, located near the middle of the board beside LCD
screen. Lift the board off the chassis slowly and disconnect any remaining wire
harnesses from the control board.
6. Place control board keypad facing down onto a clean, flat, static-free surface, if
returning to the unit.
9. S er v ice I nst ru c t io ns
1

19
LT-2 027
D. CONTROL PC BOARD REPLACEMENT
CAUTION– Failure to wear anti-static equipment during service may damage
this device.
1. See instructions above to remove the cover and the control PC board.
2. Wearing an anti-static device, verify that the silicone rattails holding the key-
board onto the control board are pulled through the appropriate holes in the
board. See Key Pad & LCD Display instructions.
3. Place the chassis on a clean flat surface with the blower facing down. Orient the
replacement board so that the keypad is over the rounded end of the chassis.
4. Tilt the board and connect the two wire harnesses near the power supply board
and insert the brown and blue wires into the notch on the chassis. Tilt the board
and connect the two wire harnesses near the outlet port. Connect the wire har-
ness near the right corner of the keypad. (Fig. 2)
5. Position the board (Fig. 3) so that: the hole on the board (A), located below the
ON/OFF key, is over the peg on the chassis; the small hole (B), located near
the LCD screen, is over the screw hole on the chassis; and the cut-out (C) on
the left rear corner fits around the protrusion above the air outlet port on the
chassis. Move any stray tubing from between the board and the chassis, verify
that all wire harnesses are properly routed, and replace the T-15 screw on the
board.
6. Replace the cover. See instructions above.
7. Connect the CPAP to a PC serial port with cable DV51D-615 and turn the
CPAP on.
8. Use a terminal program (such as Windows HyperTerminal, or equivalent) with
COM settings 9600 baud, no parity, 8 data bits, 1 stop bit, Flow Control set to
none.
9. When connection is established with the CPAP, the terminal program will show:
“RH;” every 1/2 seconds. This display indicates that the CPAP is waiting for a
handshake.
10. Type ‘rh’ and press ENTER. The CPAP should respond with the firmware ver-
sion in the form “V0.XX dd/mm/yyyy.” Please note that all commands are
case sensitive. Repeat this step if necessary to complete the handshake.
11. Type ‘Mn<cr>’. The CPAP will report the model number saved in memory, it
should be “000000” if the PC board is new.
12. Read the model number from the CPAP label on the bottom of the unit (EX:
DV54SE).
13. Type ‘Mn=nnnnnn<cr>’ where nnnnnn is the 6 digit model number read in
the previous step (use a space for the last digit if necessary to make the string 6
digits). The CPAP should return the new six-digit model number.
14. Type ‘Sn<cr>’. The CPAP will report the serial number saved in memory, it
should be “00000000” if the PC board is new.
15. Read the serial number from the CPAP label on the bottom of the unit.
16. Type ‘Sn=nnnnnnnn<cr>’ where nnnnnnnn is the 8 digit serial number read in
the previous step. The CPAP should return the new eight-digit serial number.
17. Read the Hour Meter (“Uh<cr>”)– a new PC board should have 00000
hours. It is recommended that the original hour meter value be restored if the
original blower is used. Set the hour meter by sending ‘Uh=nnnn<cr>’ where
nnnn is the hour meter reading x 10 (Ex: 100.5 hours would be set by typing
‘Uh=1005<cr>’).
9.
2
3A
B
C

20 LT- 2 027
18. Read the Compliance Meter (“Up<cr>”)– a new PC board should have 00000
hours. Clear the Compliance meter if it is not zero by typing ‘Up=c<cr>’. The
CPAP will return 000000.0 hours.
19. Check the firmware and hardware version information. Read and record the
following:
• BIOS rev “VB<cr>”
• Firmware rev “VF<cr>”
Check the present version of firmware to make sure the board is up to date.
Install new firmware if the board has an old version.
20. Check for last saved error, type ‘El<cr>’. The CPAP will respond with “Exx
dd/mm/yyyy” where xx is the last saved error code and dd/mm/yyyy is the
date that the error was detected. Clear the last error by typing ‘Ec<cr>’, the
CPAP will return “OK.” Verify that the error code is “00” by typing ‘El<cr>’.
21. Set all device settings to their default values by typing ‘TD<cr>’.
The CPAP should return “OK.”
22. Recalibrate the unit.
E. POWER SUPPLY BOARD REMOVAL
CAUTION– Failure to wear anti-static equipment during service may damage
this device.
1. See instructions above to remove the cover and the control PC board.
2. Wearing an anti-static device and with the power supply board facing you, apply
thumb pressure to top left corner of the board while pulling the top right corner
up and out of the mount clip at its bottom.
3. Pulling the top left corner out of its mount clip, lift the board off the chassis.
4. If returning the power supply board to the unit, place the board onto a clean,
flat, static-free surface with its large components facing up OR if discarding the
power supply board, remove the two wire harnesses for use with the replace-
ment board or purchase a new wire harness kit.
F. POWER SUPPLY BOARD REPLACEMENT
CAUTION– Failure to wear anti-static equipment during service may damage
this device.
1. See instructions above to remove the cover, the control PC board and the
power supply board.
2. Wearing an anti-static device, connect the wire harnesses from the old power
supply board to the new power supply board.
3. Position the chassis so that the blower faces down and the inlet and outlet ports
face you. Position the power supply board so that the components are facing
away from you with the large brown component in the bottom left corner and
the small blue component in the top right corner.
4. Place the board into the mount clips at the bottom of the power supply board cavity
and press down firmly on the top corners until the board is fully mounted.
5. See instructions above to replace the control PC board and the cover.
9.