DeVilbiss Drive 1025DS User manual
DANGER – NO SMOKING
Assembled in USA
Drive Devilbiss®10-liter Oxygen COnCentratOr
serviCe Manual
MODEL 1025DS
MODEL 1025KS
MODEL 1025UK
CAUTION
Federal (U.S.A.) law restricts this device to sale by or on the order of a physician.
LT-2329
2
TABLE OF CONTENTS
GENERAL INFORMATION
Introduction............................................................................................................................................................................................................................. 3
Symbol Definitions.................................................................................................................................................................................................................. 3
Important Safeguards............................................................................................................................................................................................................. 3
UNPACKING AND SETUP
Initial Inspection...................................................................................................................................................................................................................... 6
Patient Setup.......................................................................................................................................................................................................................... 6
Operating Instructions ............................................................................................................................................................................................................ 6
MAINTENANCE
Patient Alert System............................................................................................................................................................................................................... 8
Alarm Function Testing........................................................................................................................................................................................................... 8
Service Life ............................................................................................................................................................................................................................ 9
Routine Patient Maintenance ................................................................................................................................................................................................. 9
Periodic Homecare Provider Preventative Maintenance........................................................................................................................................................ 9
Preventative Maintenance Summary ................................................................................................................................................................................... 10
Provider's Notes ................................................................................................................................................................................................................... 10
TROUBLESHOOTING
System Operation................................................................................................................................................................................................................. 12
Normal Operating Sequence................................................................................................................................................................................................ 12
Simplified Troubleshooting ................................................................................................................................................................................................... 13
Troubleshooting Chart A....................................................................................................................................................................................................... 14
Troubleshooting Chart B ...................................................................................................................................................................................................... 15
Troubleshooting Chart C ...................................................................................................................................................................................................... 15
Troubleshooting Chart D ...................................................................................................................................................................................................... 15
Troubleshooting Chart E ...................................................................................................................................................................................................... 16
Troubleshooting Chart F....................................................................................................................................................................................................... 16
COMPONENT TESTING, REPAIR, AND REPLACEMENT
Proper Repair Procedures.................................................................................................................................................................................................... 17
Cabinet Removal.................................................................................................................................................................................................................. 17
Accuumulator Tank............................................................................................................................................................................................................... 17
Accumulator Pressure Test .................................................................................................................................................................................................. 17
Auxiliary Oxygen Port........................................................................................................................................................................................................... 18
Capacitor .............................................................................................................................................................................................................................. 18
Check Valves........................................................................................................................................................................................................................ 19
Compressor.......................................................................................................................................................................................................................... 19
Cooling Fan.......................................................................................................................................................................................................................... 22
Flow Meter............................................................................................................................................................................................................................ 22
Hour Meter ........................................................................................................................................................................................................................... 22
Manifold................................................................................................................................................................................................................................ 22
Molecular Sieve Beds........................................................................................................................................................................................................... 23
Power Cord .......................................................................................................................................................................................................................... 23
Power Switch........................................................................................................................................................................................................................ 23
Pressure Regulator .............................................................................................................................................................................................................. 24
Printed Circuit Board (PC Board)......................................................................................................................................................................................... 24
Rotary Valve ......................................................................................................................................................................................................................... 25
FIGURES, DIAGRAMS AND PARTS LIST
1025 Unit with Auxiliary Oxygen Port................................................................................................................................................................................... 26
Accessories and Tools.......................................................................................................................................................................................................... 28
Pneumatic and Wiring Diagrams.......................................................................................................................................................................................... 29
ORDERING INFORMATION AND PARTS RETURN
Ordering Information ............................................................................................................................................................................................................ 31
Returns................................................................................................................................................................................................................................. 31
WARRANTY......................................................................................................................................................................................................................... 32
Return and Disposal............................................................................................................................................................................................................. 32
SPECIFICATIONS................................................................................................................................................................................................................ 33
ELECTROMAGNETIC COMPATIBILITY INFORMATION................................................................................................................................................... 34
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LT-2329
INTRODUCTION
This service manual was designed to provide DeVilbiss Healthcare qualied service technicians and homecare providers with the proper maintenance, service, safety,
and repair procedures for the Drive DeVilbiss Oxygen Concentrator.
Read and understand all the information contained in this service manual before attempting to operate or perform any maintenance on the concentrator.
An oxygen concentrator is a device that delivers highly concentrated oxygen for therapeutic applications.
Room air is a mixture of 78% nitrogen, 21% oxygen, 1% argon and other gases. The concentrator draws in room air, separates the nitrogen from the oxygen, and
delivers concentrated oxygen to the patient through an oxygen port.
For more in-depth classroom type training, contact the Respiratory Technical Service Department at 1-800-338-1988 (814-443-4881).
NOTE– DeVilbiss reserves the right to alter or change the design of the Drive DeVilbiss Oxygen Concentrator series. Hence, slight differences in construction or
components may exist between the unit in hand and what is described in this manual.
SYMBOL DEFINITIONS
It is mandatory to read and understand the operating
instructions prior to use.
This symbol has a blue background on the
product label.
O
I
Off
On Catalog Number LOT Number
Electric Shock Hazard. Cabinet to be removed by
authorized personnel only.
This symbol has a yellow background on the
product label.
Reset Serial Number Manufacturer
Danger - No smoking near patient or device.
This symbol has a red circle and diagonal bar on
the product label.
Alternating Current Normal Oxygen EC REP European
Representative
Use no Oil, Grease or Lubricants
This symbol has a red circle and diagonal bar on
the product label.
Type B applied part Low Oxygen European Rep CE mark
Do not use near heat or open ames
This symbol has a red circle and diagonal bar on
the product label.
Double Insulated Service Required
10
≤
10 LPM
10
8 8
6 6
4 4
2 2
Maximum
recommended ow
rate: 10 LPM
General Warning
This symbol is used throughout this manual to
indicate hazardous situations to avoid.
Hour Meter
C US
TUV Rheinland C-US
approval mark
Important Information
This symbol is used throughout this manual to
indicate important information you should know.
+5˚C
+35˚C Operating Temperature
Range +5 to +35˚C (+41 to
+95˚F)
TUV Rheinland Certied
approval mark
Note and Information Symbol
This symbol is used throughout this manual to
indicate notes, useful tips, recommendations and
information.
Atmospheric Pressure
Range 840 to 1010 hPa
(Approximate sea level to
5000 ft)
Inmetro approval mark
Federal (U.S.A.) law restricts this device to sale by or on the order of a physician.
IP21
Ingress Protection - Protected against nger access to hazardous parts; protected against vertically falling water drops.
This device contains electrical and/or electronic equipment that must be recycled per EU Directive 2012/19/EU- Waste Electrical and Electronic Equipment (WEEE)
IMPORTANT SAFEGUARDS
Read this entire guide before using your DeVilbiss concentrator. Important safeguards are indicated throughout this guide. Pay special attention to all safety information.
Imminently and potentially hazardous information is highlighted by these terms:
DANGER
Indicates an imminently hazardous situation which could result in death or serious injury to the user or operator if not avoided.
WARNING
Indicates a potentially hazardous situation which could result in death or serious injury to the user or operator if not avoided.
CAUTION
Indicates a potentially hazardous situation which could result in property damage, injury, or device damage if not avoided.
IMPORTANT
Indicates important information you should know.
NOTE
Indicates notes, useful tips, recommendations, and information.
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GENERAL INFORMATION
READ ALL INSTRUCTIONS BEFORE USING.
DANGER
• Oxygen causes rapid burning. Do not smoke while your oxygen concentrator is operating, or when you are near a person utilizing oxygen therapy.
• Smoking during oxygen therapy is dangerous and is likely to result in facial burns or death. Do not allow smoking within the same room where the
oxygen concentrator or any oxygen carrying accessories are located.
• If you intend to smoke, you must always turn the oxygen concentrator off, remove the cannula and leave the room where either the cannula or
mask or the oxygen concentrator is located. If unable to leave the room, you must wait 10 minutes after you have turned off the oxygen
concentrator before smoking.
• Oxygen makes it easier for a re to start and spread. Do not leave the nasal cannula or mask on bed coverings or chair cushions if the oxygen
concentrator is turned on but not in use. The oxygen will make the materials ammable. Turn the oxygen concentrator off when not in use to prevent
oxygen enrichment.
• Keep the oxygen concentrator and cannula at least 2 m (6.5 feet) from hot, sparking objects or naked sources of ame.
• Open ames during oxygen therapy are dangerous and are likely to result in re or death. Do not allow open ames within 2 m (6.5 feet) of the oxygen
concentrator or any oxygen carrying accessories.
• Drive DeVilbiss oxygen concentrators are equipped with a re mitigating outlet tting that prevents propagation of re into the unit.
WARNING
• To avoid electric shock, do not plug the concentrator into an AC outlet if the concentrator cabinet is broken. Do not remove the concentrator cabinet.
The cabinet should only be removed by a qualied Drive DeVilbiss technician. Do not apply liquid directly to the cabinet or utilize any petroleum-based
solvents or cleaning agents.
• Improper use of the power cord and plugs can cause a burn, re or other electric shock hazards. Do not use the unit if the power cord is damaged.
• Ensure the mains power cord is fully inserted into the concentrator connector (230 volt units) and the power cord plug is completely inserted into a fully
functioning AC wall outlet. Failure to do so may cause an electrical safety hazard.
• In order to prevent a re propagating from the patient through the cannula towards the unit, a means of protection should be located as close to the
patient as practicable. Country Standards may vary. Please contact your provider for information.
• Locate oxygen tubing and power supply cords to prevent tripping hazards and reduce the possibility of entanglement or strangulation.
• Do not lubricate ttings, connections, tubing or other accessories of the oxygen concentrator to avoid the risk of re and burns.
• Do NOT use lubricants, oils or grease.
• Before attempting any cleaning procedures, turn the unit “Off.”
• Use only water-based lotions or salves that are oxygen-compatible before and during oxygen therapy. Never use petroleum or oil-based lotions or
salves to avoid the risk of re and burns.
• Use only spare parts recommended by the manufacturer to ensure proper function and to avoid the risk of re and burns.
• When using the Transller Caddy with a Transll device, always keep the system on a at surface. Disassemble the system prior to moving.
• If you feel discomfort or are experiencing a medical emergency while undergoing oxygen therapy, seek medical assistance immediately to avoid harm.
• Geriatric, pediatric or any other patient unable to communicate discomfort can require additional monitoring and/or a distributed alarm system to
convey the information about the discomfort and/or the medical urgency to the responsible caregiver to avoid harm.
• Use of this device at an altitude above 5000 feet (1524 meters) or above a temperature of 95°F (35°C) or greater than 93% relative humidity may
affect the ow rate and the percentage of oxygen and consequently the quality of the therapy. Refer to specications for details regarding parameters
tested.
• To ensure you receive the therapeutic amount of oxygen delivery according to your medical condition, the Oxygen Concentrator must:
• be used only after one or more settings have been individually determined or prescribed for you at your specic activity levels.
• be used with the specic combination of parts and accessories that are in line with the specication of the concentrator manufacturer and that were
used while your settings were determined.
• Your delivery settings of the oxygen concentrator should be periodically reassessed for the effectiveness of therapy.
• For your safety, the oxygen concentrator must be used according to the prescription determined by your physician.
• Under certain circumstances, oxygen therapy can be hazardous. Seek medical advice before using an oxygen concentrator.
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LT-2329
GENERAL INFORMATION
WARNING
MR Unsafe
• Do not bring the device or accessories into a Magnetic Resonance (MR) environment as it may cause unacceptable risk to the patient or damage to
the oxygen concentrator or MR medical devices. The device and accessories have not been evaluated for safety in an MR environment.
• Do not use the device or accessories in an environment with electromagnetic equipment such as CT scanners, Diathermy, RFID and electromagnetic
security systems (metal detectors) as it may cause unacceptable risk to the patient or damage to the oxygen concentrator. Some electromagnetic
sources may not be apparent, if you notice any unexplained changes in the performance of this device, if it is making unusual or harsh sounds,
disconnect the power cord and discontinue use. Contact your home care provider.
• This device is suitable for use in home and healthcare environments except for near active HF SURGICAL EQUIPMENT and the RF shielded room of
an ME SYSTEM for magnetic resonance imaging, where the intensity of Electromagnetic DISTURBANCES is high.
• Use of this equipment adjacent to or stacked with other equipment should be avoided because it could result in improper operation. If such use is
necessary, this equipment and the other equipment should be observed to verify that they are operating normally.
• Portable RF communications equipment (including peripherals such as antenna cables and external antennas) should be used no closer than 30 cm
(12 inches) to any part of the oxygen concentrator, including cables specied by the manufacturer. Otherwise, degradation of the performance of this
equipment could result.
CAUTION
• It is very important to follow your oxygen prescription. Do not increase or decrease the ow of oxygen – consult your physician.
• To prevent product damage, do not attempt to operate the unit without the air lter, or while the lter is still damp.
• The surface temperature of the exhaust vents on the bottom of the unit may exceed 105.8˚F (41˚C) under certain conditions.
• When device is used under extreme operating conditions, the temperature near the exhaust vents on the bottom of the unit may reach 138.2°F (59°C).
Keep body parts a minimum of 30” (76.2 cm) away from this area.
• Use of harsh chemicals (including alcohol) is not recommended. If bactericidal cleaning is required, a non-alcohol based product should be used to
avoid inadvertent damage.
IMPORTANT
• It is recommended that the homecare provider lock the ow control knob to prevent inadvertent adjustment. A ow setting other than prescribed may
affect the patient therapy.
• Do not service or clean this device while in use with a Patient.
• Do not use a low-output ow meter with this concentrator.
• The Device is classied as IP21 which means it is protected against nger access to hazardous parts and protected against vertically falling water
drops.
• Equipment not suitable for use in the presence of a ammable anesthetic mixture with air or with oxygen or nitrous oxide.
• This device contains electrical and/or electronic equipment. Follow local governing ordinances and recycling plans regarding disposal of device
components.
SAVE THESE INSTRUCTIONS.
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UNPACKING AND SETUP
INITIAL INSPECTION
It is suggested that an initial inspection be performed upon receiving the oxygen
concentrator.
1. After removing the Drive DeVilbiss Oxygen Concentrator from the carton,
examine it for any external damage. If shipping damage has occurred,
contact the DeVilbiss Customer Service Department at 1-800-338-1988
(814-443-4881) for specic instructions. Save the carton for possible later
return; note the position of the unit and placement of the packing material.
2. Open the lter door and make sure the intake bacteria lter is in place.
3. Check to make sure the air cabinet lter is in place.
4. Plug the unit into an electrical outlet, turn the unit “On” and check the
audible and visible alerts.
5. Record hours on the digital hour meter located on the light panel.
6. Set the ow meter to maximum recommended liter ow and let the unit run
for at least 20 minutes.
7. Use an oxygen analyzer to check the concentration.
8. With unit still running, unplug it to test the power fail alarm.
NOTE– If the unit fails to operate properly (oxygen concentration not within
specication) or if internal damage is found, contact the Drive DeVilbiss
Customer Service Department at 1-800-338-1988 (814-443-4881).
PATIENT SETUP
1. Position the unit near an electrical outlet in the room where the patient
spends most of his or her time.
WARNING
Do not connect to an electrical outlet controlled by a wall switch.
2. Position the unit at least 6 inches (16 cm) from walls, draperies, or any
other objects that might prevent the proper ow of air in and out of the
oxygen concentrator. The concentrator should be located in a well-
ventilated area to avoid pollutants or fumes.
3. Locate the unit a minimum of 6.5 feet (2 m) from replaces, radiators,
heaters, and hot-air registers.
WARNING
Oxygen causes rapid burning. Do not smoke while your oxygen
concentrator is operating, or when you are near a person utilizing
oxygen therapy. Keep the oxygen concentrator and cannula at least
6.5 feet (2 m) from hot, sparking objects or naked sources of ame.
Electric Shock Hazard. Only qualied Drive DeVilbiss Healthcare
homecare providers may remove the cabinet.
4. Attach the appropriate oxygen accessories (oxygen tubing or humidier) to
the oxygen outlet port.
NOTE– A maximum of 50 feet (15 meters) of tubing plus 7 feet (2.1 meters)
of cannula plus a bubble humidier is allowed between the concentrator and the
patient.
WARNING
In order to prevent a re propagating from the patient through the
cannula towards the unit, a means of protection should be located as
close to the patient as practicable. Country Standards may vary.
Please contact your provider for information.
Oxygen Tubing Only Connection
1. Thread the cannula tting onto the oxygen outlet port.
2. Attach the 5/32” (4 mm) I.D. oxygen tubing.
Oxygen Tubing with Humidification
Connection
If the physician has prescribed an oxygen humidier as part of the patient’s
therapy, follow these steps (If using a prell, go to Step 3.):
1. Fill the humidier bottle per manufacturer's instructions.
2. Thread the wing nut located on the top of the humidier bottle to the
oxygen outlet port so that it is suspended. Make sure it is securely
tightened.
3. Attach the 5/32" (4 mm) I.D. oxygen tubing, not to exceed 50 feet (15
meters) plus 7 feet (2.1 meters) of cannula, directly to the humidier bottle
outlet tting.
NOTE– For optimum performance, the Drive DeVilbiss Oxygen Concentrator
has a preset nominal output pressure of 20 psi (138 kPa). Use only “bubble-type”
humidiers designed for use with ows up to 10 liters per minute. Do not use
“jet-type” humidiers.
WARNING
In order to prevent a re propagating from the patient through the
cannula towards the unit, a means of protection should be located as
close to the patient as practicable. Country Standards may vary.
Please contact your provider for information.
When ready for operation
1. Attach the nasal cannula to the oxygen tubing (per the manufacturer’s
directions).
2. Follow the Operating Instructions.
OPERATING INSTRUCTIONS
1. Remove the power cord completely from the strap. Make sure the power
switch is in the “Off” position.
2. 120 Volt Units– Insert the plug into an electrical outlet. The Drive DeVilbiss
Oxygen Concentrator uses a two-prong polarized plug and is double-
insulated to protect against electric shock.
220/230/240 Volt Units – Ensure cord is connected to the unit before
inserting plug into an appropriate electrical outlet.
WARNING
The plug on the Drive DeVilbiss 1025DS concentrators has one
blade wider than the other. To reduce the risk of electric shock, this
plug is intended to t in a wall outlet only one way. Do not attempt to
defeat this safety feature.
Improper use of the power cord and plugs can cause a burn, re, or
other electric shock hazards. Do not use the unit if the power cord is
damaged.
Oxygen causes rapid burning. Do not smoke while your oxygen
concentrator is operating, or when you are near a person utilizing
oxygen therapy. Keep the oxygen concentrator and cannula at least
6.5 feet (2 m) from hot, sparking objects or naked sources of ame.
WARNING
The Drive DeVilbiss 1025 oxygen concentrator is equipped with a re
mitigating outlet tting that prevents propagation of re into the unit.
In order to prevent a re propagating from the patient through the
cannula towards the unit, a means of protection should be located as
close to the patient as practicable. Country Standards may vary.
Please contact your provider for information.
3. Press the power switch to the "On" position. When the unit is turned “On”,
all three lights (Service Required, Low Oxygen and Normal Oxygen) on the
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LT-2329
UNPACKING AND SETUP
front panel will illuminate momentarily and an audible signal will briey
sound conrming that the LEDs and audible signal are functioning
properly. The unit will operate in “start up” mode with the Low Oxygen light
lit until oxygen stabilization is achieved, at which time the Normal Oxygen
light will come on and remain lit. The “start up” mode may take up to 15
minutes.
NOTE–DeVilbiss recommends for optimal service life that the Drive
DeVilbiss Oxygen Concentrator to be operated for at least 30 minutes
after it is powered on. Shorter periods of operation, operating in extreme
temperature/humidity conditions or in the presence of contaminates, and/
or handling and storage conditions outside those specied, may affect the
long term reliable operation of the product.
4. Slowly turn the ow meter knob until the ow meter ball is centered on the
line next to the appropriate ow rate.
NOTE– When the ow meter knob is turned clockwise, the ow
decreases (and eventually will shut off the oxygen ow). When the knob is
turned counter-clockwise, the ow increases.
NOTE– For prescriptions of 10 LPM, be sure the ball is centered on
the 10 liter line; the ball should not touch the red line. Setting the ow
higher than 10 may cause the oxygen purity level to drop.
NOTE– The low-ow alarm may activate if the ow meter ball is set
below 2 lpm. The unit will continue to run; however, the Service Required
light will come on accompanied by an audible alarm. Adjust the ow meter
to your prescribed ow.
NOTE– Do not use a low-output ow meter with this concentrator.
NOTE– The unit may require up to 15 minutes for the oxygen
concentration and ow rate to stabilize. The ow rate should be monitored
and readjusted if necessary.
5. The ow meter has a locking device. If it is necessary to preset and lock
in the prescribed ow rate, tighten the set screw located on the hex nut
just below the control knob using a 1/16" Allen bit. No adjustment can be
made without loosening the set screw.
6. The Drive DeVilbiss oxygen concentrator is now ready for use.
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MAINTENANCE
PATIENT ALERT SYSTEM
The Drive DeVilbiss Oxygen Concentrator patient alert system will detect unit
component failure. This system is comprised of both visible and audible alerts
which signal the patient if a malfunction should occur.
DeVilbiss OSD®Operation
The OSD is a device within Drive DeVilbiss concentrators that monitors the
oxygen produced by the unit. The OSD operates as follows:
• Normal Oxygen (green light) - oxygen purity normal
• Low Oxygen (yellow light) - oxygen purity low–requires servicing
NOTE– If the oxygen purity continues to fall, an audible signal will sound
intermittently. If the oxygen purity continues to fall to a low enough level, the
yellow “Low Oxygen” light will remain on and the red “Service” light will also turn
on.
NOTE– Refer to the Alerts section below for specic alert settings.
NOTE– After power on, the electronics continuously monitors the oxygen
sensor. If a fault is detected, the green "Normal Oxygen" light will turn off and
the beeping audible alert and blinking red "Service Required" light will activate.
The rst 15 minutes, the unit will be in “Start Up” mode. The oxygen purity is
continuously monitored and the green "Normal Oxygen" light will turn on as
soon as the therapeutic oxygen levels are obtained. After 15 minutes
stabilization time, if the O2is less than 85% the yellow Low O2LED will be on
and a beeping audible alarm will occur. If the level is below 60% (after startup)
then the yellow and red LEDs will be lit along with a beeping audible alarm. The
audible low O2 alarms are blocked during the 15 minute stabilization delay and
also during the 10 minute stabilization delay that occurs during turn-down mode
enter/exit.
Alerts:
There are two visible service alerts located on the front panel.
Low O2%Service
The audible alert system is internally powered; no batteries are required. If the
indicator lights illuminate or the audible alert sounds other than during start-up,
a problem has occurred
• Power Failure (Pulsing audible alert)
• Low Flow (Below 2 lpm) (Continuous red “Service” light and audible alert)
Below normal O2:
• The yellow Low Oxygen light will illuminate with an audible alarm at
approximately <85%.
• The yellow Low Oxygen and red Service Required lights will illuminate with
an audible alarm at <60%.
The audible alert will activate for a minimum of two minutes in a no power
situation. There is no visual indicator for this alarm. If the unit is turned “On”
without power or power is removed later, the alert will sound within 10 seconds.
After that time, the alert will produce an audible pulse every few seconds. Power
for this alert is provided by a capacitor on the PC board.
NOTE– If the concentrator has been unused for an extended period, the unit
must run several minutes before the power fail alert will activate.
The PC (printed circuit) board is responsible for controlling the system and
alerts.
NOTE– A high pressure condition is indicated by the audible (a “popping”
sound) release of pressure from a pressure relief valve located on the
compressor head.
NOTE– Settings below 2 LPM may activate the low ow alarm. Do not use a
low-output ow meter with this concentrator.
ALARM FUNCTION TESTING
The 1025 series is designed to activate alarms when certain conditions or
failures occur. The alarm functions may be tested following the procedures
below:
1. Overheating:
a. Remove the front and rear covers from the concentrator; then
disconnect the cooling fan from the printed circuit board.
b. Replace the front and rear covers.
c. Place the concentrator in a location that has an ambient temperature
of approximately 70° F. Then plug the unit into the appropriate mains
voltage and turn it on.
d. Allow the unit to operate until the Service Required Alarm activates,
which should be within approximately two hours.
2. Compressor Failure:
a. Remove the rear cover from the concentrator; then disconnect the
compressor electrical connector from the main wire harness.
b. Plug the unit into the appropriate Mains voltage and turn it on.
c. Allow the unit to operate until the Service Required Alarm activates,
which should be within approximately two minutes.
3. Low Flow / Obstruction of Gas Pathway:
a. Plug the concentrator into the appropriate mains voltage and turn it
on.
b. Allow the device to run for several minutes.
c. Turn the ow meter off so that there is no oxygen owing out of the
unit.
d. Allow the unit to operate until the alarm condition occurs (red light
and audible beep).
e. Increase the ow to 2 LPM and conrm that the alarm condition
ends.
4. High Flow
a. Connect the oxygen concentrator to AC power and turn the power
switch on.
b. Allow the device to run for several minutes.
c. Adjust the output ow to more than 11.0 LPM using the ow meter
knob (turn counter clockwise until ball goes above 11.0 LPM).
d. The alarm condition (yellow light) should occur.
e. Decrease the ow to 10 LPM and conrm that the alarm condition
ends.
5. Oxygen Generation Mains Failure:
a. Plug the concentrator into the appropriate mains voltage and turn it
on.
b. Turn the ow meter to 10 LPM.
c. Attach another ow meter to the auxiliary oxygen port which is
located on the rear of the concentrator and then adjust the ow to 3
LPM.
d. Allow the unit to operate until the Service Required Alarm is
activated, which should be within approximately thirty minutes.
6. Pressure Failure:
a. Remove the front and rear covers from the concentrator.
b. Disconnect the tubing from the top of one of the sieve beds.
c. Plug the unit into the appropriate mains voltage and turn it on.
d. Turn the ow meter to 10 LPM.
e. Allow the unit to operate until the Service Required Alarm is
activated, which should be within approximately thirty minutes.
7. Power Supply Failure
a. Connect the oxygen concentrator to AC power and turn the power
switch on. Allow the device to run for several minutes.
b. With the power switch in the on position, unplug the AC power cord
from the outlet.
c. The alarm condition (audible beep) should occur and continue for a
minimum of 120 seconds. There is no visual indicator for this alarm
9
LT-2329
MAINTENANCE
condition.
d. Reconnect the AC power cord and conrm that the alarm condition
ends.
8. Malfunction – O2S Gas Temperature High
a. This alarm condition is tested automatically during start-up.
9. Malfunction – Corrupted Settings
a. This alarm condition is tested automatically during start-up.
10. Malfunction – Non-Recoverable Valve Error
a. This alarm condition is tested automatically during start-up.
11. Malfunction – O2S Oxygen Sensor Communication Failure
a. This alarm condition is tested automatically during start-up.
12. Low Oxygen Concentration – Startup Period
a. Connect the oxygen concentrator to AC power and turn the power
switch off.
b. Leave the device off for several minutes until the outlet ow is zero
(ow meter ball at zero).
c. Turn the power switch to the on position. The alarm condition (yellow
light) occurs during startup until the oxygen concentration reaches
85%.
13. Low Oxygen Concentration – Startup Period Over
a. This alarm condition is tested automatically during start-up. Once the
oxygen concentration reaches 85% the green light comes on.
SERVICE LIFE
The expected service life of the 1025 is 5 years of operation, when used in
accordance with all manufacturer guidance for safe use, maintenance, storage,
handling and general operation. Expected service life of the unit, and in
particular the sieve beds and compressor, may vary based on the operating
environment, storage, handling and the frequency and intensity of use.
ROUTINE PATIENT MAINTENANCE
DeVilbiss recommends using only original DeVilbiss parts and lters in order to
guarantee a reliable operation of the product.
The oxygen patient should perform the following maintenance:
Cannula, Tubing, and Humidifier Bottle
The patient should clean and replace the cannula, tubing, and humidier bottle
according to the manufacturer’s instructions.
Air Filter
The air lter should be inspected periodically and cleaned as needed by the
user or caregiver. Replace if torn or damaged. To clean, follow these steps:
NOTE– Frequency of inspection and cleaning of lter may be dependent
upon environmental conditons like dust and lint.
1. Remove the air lter located in the door on the back of the unit.
2. Wash in a solution of warm water and dishwashing detergent.
3. Rinse thoroughly with warm tap water and towel dry. The lter should be
completely dry before reinstalling.
CAUTION
Do not attempt to operate the unit without the air lter or while the
lter is still damp
NOTE–The air lter should be monitored more closely in environments with
abnormal amounts of dust and lint.
CAUTION
Operation of the Drive DeVilbiss Oxygen Concentrator in extreme
environments or without the air lter will prematurely occlude the
intake bacteria lter and cause a decrease in the unit performance.
Exterior Cabinet
The patient should clean the concentrator exterior cabinet weekly by using a
damp cloth or sponge with a mild household cleaner and wiping it dry.
WARNING
Do not apply liquids directly to the cabinet or utilize any petroleum-
based solvents or cleaning agents.
PERIODIC HOMECARE PROVIDER
PREVENTATIVE MAINTENANCE
Use only DeVilbiss concentrator replacement parts and accessories.
Every Drive DeVilbiss Oxygen Concentrator is tested at the factory. To assure
continued trouble-free performance, the following preventative maintenance
should be performed by the homecare provider during periodic oxygen patient
visits. Failure to properly maintain the unit will void the warranty.
1. Check the oxygen concentration with an oxygen analyzer (part #R217P62)
– every 3 years.
a. Calibrate the oxygen analyzer prior to checking the oxygen
concentration. The analyzer should be properly calibrated using the
manufacturer’s recommended procedure.
NOTE– Changes in temperature, altitude or humidity may affect the
analyzer’s oxygen concentration reading. The analyzer should be calibrated in
similar conditions to the location of the concentrator.
b. Power the unit. Set the ow meter to 10 LPM and connect the
analyzer to the unit’s oxygen outlet port.
c. Wait 20 minutes for the display to stabilize. The concentrator must
operate for a minimum of 20 minutes before checking the oxygen
concentration.
d. Record the reading.
2. Check the audible alert and indicator lights during every service. When the
power is turned “ON,” listen for the audible alert and check to see if the
front panel indicator lights are operating.
3. Inspect cabinet air lter (part #303DZ-605) every PM check. Replace if
lter is torn or damaged.
4. Inspect intake bacteria lter (part #1025D-605) at every PM check.
Replace if the lter looks dirty or there is a drop in oxygen purity.
a. Open the lter door and replace lter as required.
Air Intake Holes
5. I nspect the nal bacteria lter (part #PV5LD-651) during every compressor
service.
a. Use the Cabinet Removal instructions found under CABINET
REMOVAL in this manual to remove and attach the cabinets.
b. Remove the hose from each end of the lter and discard the lter.
LT-2329
10
MAINTENANCE
c. Install the new nal bacteria lter with the “IN” tting toward the ow
meter.
6. Inspect the compressor lter (part #1025D-682) during every compressor
service. Replace if the compressor is replaced.
NOTE– A new style compressor lter with an aluminum housing is now
being used. See below:
New Style Old Style (no longer used)
7. Inspect the AC power cord, power switch and circuit breaker between every
patient change. Replace any damaged or defective components.
NOTE– This PM Schedule reects:
• 4000 hour usage equal to one year
• a normal, clean operating environment.
The homecare provider is responsible for:
• determining the condition of the concentrator operating environment.
• determining a preventative maintenance interval frequency* which
takes into consideration the specic operating environment.
* Standard intervals are noted below. Service interval may be more
or less frequent than stated below provided that the Home Care
Provider establishes and documents appropriate protocols.
PREVENTATIVE MAINTENANCE SUMMARY
Patient / Caregiver
Clean and replace oxygen tubing, cannula / mask, and humidier bottle (if used)
according to manufacturer’s instructions.
Homecare Provider
During each inspection
Wash/Replace cabinet lter.
Check audible alert and indicator lights.
During each PM check – every 3 years for the 1025 series
Inspect/Replace intake bacteria lter as necessary.
Check oxygen purity.
During compressor service
Inspect/ Replace nal bacteria lter.
Inspect/ Replace the compressor lter
NOTE– There is no portion of the gas pathways through the concentrator that
could be contaminated with body uids under normal conditions.
The device patient connection may unintentionally become contaminated with
expired gases if a hose internal to the device becomes disconnected. This
condition will cause no ow out of the device and/or an alarm condition. Should
this occur, remove the front cabinet in order to determine where the
disconnection occurred.
Replace all components from the free end of the disconnect through the outlet
port. Reference the pneumatic diagram and replacement part numbers/
instructions.
PROVIDER’S NOTES - Cleaning and
Disinfection When There is a Patient
Change
DeVilbiss Healthcare recommends that at least the following procedures be
carried out by the manufacturer or a qualied third party between uses by
different patients.
NOTE– If the following described complete processing of the concentrator by
an appropriately trained individual is not possible, the device should not be used
by another patient.
NOTE– If preventive maintenance is due at this time, these procedures
should be carried out in addition to the servicing procedures.
1. Use disinfectants safely. Always read the label and product information
before use.
2. Always wear personal protective equipment when performing this
procedure. Use suitable gloves and safety glasses. Cover exposed skin on
arms to prevent accidental contact with bleach solution that has been
applied to the concentrator.
3. Dispose of all accessories that are not suitable for reuse. This includes but
may not be limited to the oxygen tubing, tubing connectors, nasal cannula
and/or mask, oxygen outlet connector, and humidier bottle.
4. Clean the exterior of the concentrator with a clean lint-free cloth. Heavy soil
should be removed with a clean lint-free cloth dampened with water. A soft
bristled brush dampened with water can be used to remove stubborn soil.
Dry the concentrator using a clean lint-free cloth if water was used to
remove soil.
5. Use 5.25% chlorine bleach (Clorox Regular Liquid Bleach or equivalent).
Mix one (1) part bleach with four (4) parts water in an appropriate clean
container. This ratio produces a one (1) part bleach to ve (5) total parts
solution (1:5). The total volume (amount) of solution required is determined
by the number of concentrators in need of disinfection. NOTE– An
alternate suitable disinfecting agent (e.g. Mikrobac® forte or Terralin®
Protect) may also be used. Follow disinfectant manufacturer’s instructions.
6. Apply the bleach solution in an even manner to the cabinet and power cord
using a clean lint-free cloth. The cloth should be dampened only and not
dripping of solution. Do not use a spray bottle to apply the solution. Do not
saturate the device with the solution. Take care that no solution enters the
vent areas on the concentrator base or the Auxiliary O2 tting area on the
back of the unit. Avoid over-saturating the cabinet seams so that no solution
residue builds up in these areas. Avoid the caster wells located on the
bottom of the unit.
7. Exposure time of the disinfectant solution should be 10 minutes minimum to
15 minutes maximum.
8. After the recommended exposure time, all surfaces of the concentrator
should be wiped with a clean lint-free cloth dampened with drinking quality
water no warmer than room temperature. Dry the unit with a dry, clean lint-
free cloth. This is to remove residue that may stain or leave a lm on the
unit, especially after repeated disinfections.
9. Check the cord, the plug on the back of the device, the power switch, the
fuse holder, and the indicator lights for possible damage. Replace all
damaged or worn components.
10. Replace the cabinet air lter on the back of the device.
11. Check the oxygen concentration. If the device is within specication, the
extended life intake bacteria lter does not need to be replaced between
patients. If the oxygen concentration is not within specication, the provider
should refer to the service manual section on Troubleshooting.
12. OPTIONAL INSIDE CLEANING: The concentrator must be disconnected
from the power supply for this step: Open the concentrator and remove all
dust deposits inside the cabinet with an appropriate vacuum cleaner. Close
the concentrator.
11
LT-2329
MAINTENANCE
NOTE– There is no portion of the gas pathways through the concentrator that
could be contaminated with body uids under normal conditions.
The device patient connection may unintentionally become contaminated with
expired gases for a single fault condition i.e., a hose internal to the device
becomes disconnected. This condition will cause no ow out of the device and/or
an alarm condition. Should this occur, refer to the service manual for additional
instructions.
Cleaning
Recommended
cleaning interval
Number of
cleaning cycles *
Compatible cleaning
method
Outer Cabinet 7 days 260 Water, use only a damp cloth
Air Filter 7 days 104 Mild dish soap and warm
water
* number of cleaning cycles determined by recommended cleaning interval and
expected service life
Disinfection
NOTE–The disinfection process can only be completed by the manufacturer
or by a qualied Drive DeVilbiss provider/service technician.
Recommended
disinfection
interval
Number of
disinfection
cycles *
Compatible
disinfection method
Cabinet, power cord Between patients 20 Microbac Forte or
Terralin®,1:10 chlorine
bleach (5.25%) and
water solution
Oxygen tubing, tubing
connectors, nasal cannula/
mask, oxygen outlet
connector, humidier
bottle, cabinet air lter
Do not clean,
replace between
patients
N/A N/A
Optional - Inside cabinet Between patients N/A Remove dust with a
vacuum cleaner
LT-2329
12
TROUBLESHOOTING
SYSTEM OPERATION
The Drive DeVilbiss Oxygen Concentrator uses a pressure swing adsorption
system. The air is drawn into the unit through air lters and into a double-head
compressor.
A pneumatic diagram of the system is shown on page 29.
The compressed air passes through a rotary valve, which is cycled at a pre-
determined rate, and is directed into one of two sieve beds. The sieve beds
contain molecular sieve material which is a synthetically-produced inorganic
silicate. It is very porous and has the unique ability to selectively adsorb nitrogen
from the air as it passes through the sieve bed.
As one bed is being pressurized, the other bed is quickly depressurized. This
allows the nitrogen that was adsorbed during its pressurization cycle to be
exhausted from the sieve material.
The nitrogen is released through an exhaust port located on the rotary valve
assembly. The port is connected to the exhaust mufer.
Also during each bed pressurization, a small amount of oxygen ows through an
orice from the pressurized bed into the depressurizing bed. This helps purge the
nitrogen from the depressurizing bed.
The beds will continue to be alternately pressurized and depressurized as the
unit operates.
Oxygen leaving the sieve beds is directed through a check valve to the
accumulator tank. A pressure regulator on the tank controls the oxygen pressure
as it leaves the accumulator and enters the ow meter. The ow meter allows the
oxygen ow to be controlled and adjusted to the level prescribed by the patient’s
physician. From the ow meter the oxygen passes through the nal bacteria lter
and nally the oxygen outlet port to the patient.
The Drive DeVilbiss Oxygen Concentrator operates on a timed cycle (2.5 sec. @
ows > 4.5 LPM) that is controlled by the PC board. The PC board will send
voltage to the valve causing it to shift and alternately pressurize the sieve beds.
The PC board also activates the electronic alert system. Low ow, system
abnormality, and power failure are indicated by audible and visible alerts. A high
pressure condition will be indicated with a “popping” type sound produced by
release of pressure from a pressure relief valve on the compressor head.
The 1025 operating system incorporates “turn-down” technology. The PC board
constantly monitors the ow rate and will decrease the cycle time whenever the
ow rate is equal to or less than 4.5 LPM. Therefore it “turns-down” the cycle
based on lower oxygen demand. As a result, the unit runs cooler and less power
is consumed.
NORMAL OPERATING SEQUENCE
When the concentrator is turned “On,” the following cycling sequence can be
observed by attaching a pressure gauge to the accumulator tank test point.
1. The rotary valve is quickly cycled several times to relieve residual bed
pressure preventing a static condition in the compressor. This rapid cycling
only happens on start-up and is clearly heard as pressure is being quickly
exhausted several times. The pressure exhausts through an exhaust
mufer that is connected to the valve.
2. The PC board applies a short DC voltage signal to the valve. The valve will
stop for several seconds causing the right bed to pressurize rst while the
left bed depressurizes.
3. Voltage is again applied to the valve for a short time. The valve will stop for
approximately a second. During this time the sieve bed pressures are
equalized.
4. A short DC voltage signal is again applied to the valve. The valve will stop
for several seconds causing the left bed to pressurize while the right bed
depressurizes.
5. A short DC voltage signal is again applied to the valve. The valve will stop
for approximately a second. During this time, the sieve bed pressures are
equalized.
6. The cycle then repeats with step 2.
NOTE– In the “turn-down” mode, the xed cycle time is decreased to less
than 2 seconds.
13
LT-2329
TROUBLESHOOTING
SIMPLIFIED TROUBLESHOOTING
The key to simple troubleshooting is to recognize which type of problem exists
and select the most effective approach to solving the problem. The different
types of problems and the approaches for solutions are as follows:
Type I— Purity Issues (Low Purity Indicator Light
is activated and the audible alert may also sound.)
WARNING
Electric Shock Hazard. Extra care should be taken if it is necessary
to operate the unit with the cabinet removed.
WARNING
Mechanical Hazard. Keep ngers, loose clothing, etc. away when
working on compressor.
Observe the pressure cycle at the oxygen tank.
1. Connect a calibrated pressure gauge to the unit’s oxygen tank test point or
manifold. See accumulator pressure test on page 17.
2. Set the unit’s ow meter to 10 LPM.
3. Power the unit and allow it to operate for a minimum of 5 minutes before
observing the pressure cycle.
4. Compare the high pressures and low pressures to those expected for the
current elevation and use the following chart to nd the appropriate action.
All consecutive high pressures should be within 2 psi of each other and all
consecutive low pressures should be within 2 psi of each other.
NOTE– For normal system pressures refer to Specications.
NOTE– Check for leaks using a certied leak detection solution such as
Snoop® or equivalent (must not contain ethylene glycol). Apply leak test solution
to all ttings and hose connections with unit running. If an air leak is present, the
solution will bubble. All leaks should be repaired before putting the unit back in
service.
WARNING
Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
Pressure Diagnostic Chart
If Pressure Reading Is Do This To This
Higher than expected
(pressure relief valve may
be activated)
Replace Sieve beds (2)
Lower than expected
Inspect and replace, as
needed Filters
Inspect and correct or replace,
as needed Tubing connections
Troubleshoot
Compressor
See Component Testing,
Repair and Replacement
As expected Inspect and correct, as
needed
Leaks from sieve beds to
oxygen outlet port
Dropping too low during
cycle change Replace Check valves or manifold
Uneven - high pressures
& low pressures are not
consistent during cycle
Inspect and replace, as
needed Rotary valve wire harness
Troubleshoot or replace
Rotary valve or PC board.
See Component Testing,
Repair and Replacement
Type II—Operation Issues (Service Indicator
Light. The audible alert may also sound and the
pressure relief valve may be activated.)
WARNING
Electric Shock Hazard. Extra care should be taken if it is necessary
to operate the unit with the cabinet removed.
WARNING
Mechanical Hazard. Keep ngers, loose clothing, etc. away when
working on compressor.
NOTE– Check for leaks using a certied leak detection solution such as
Snoop® or equivalent (must not contain ethylene glycol). Apply leak test solution
to all ttings and hose connections with unit running. If an air leak is present, the
solution will bubble. All leaks should be repaired before putting the unit back in
service.
CAUTION
Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
Operation Alarm Chart
If this is happening It’s because of this Do this to resolve
Pressure relief valve has a
‘popping’ noise with
possible uneven tank
pressure.
Rotary valve not cycling
properly.
Test rotary valve. Refer to
page 25.
Continuous red light with a
pulsing audible alert while
compressor is operating.
Low ow alert – ow setting
below 2 lpm.
Correct setting and educate
user.
Continuous red light with a
continuous audible alert
and unit is warm to touch.
Internal temperature is too
high.
Move unit to cooler location.
Ensure unit vents are clear.
Ensure unit lters are clean.
Ensure cooling fan is
operating, replace as
needed.
Ensure there is proper
voltage to the unit. If voltage
is correct, replace capacitor
or compressor.
Continuous red light with a
pulsing audible alert and
fan is operating but
compressor is not.
Internal power failure to
compressor.
Test voltage at compressor
connector. If no voltage,
replace main wire harness. If
voltage present, replace
capacitor or compressor.
Pulsing audible alert and
compressor and fan not
operating.
External OR Internal power
failure.
Ensure voltage is correct
and / or the part is functional
for the following: AC outlet,
power cord, IEC connector
or cord connection, main
wire harness, circuit breaker;
correct as needed. If issue
persists, replace power
switch.
Pulsing audible alert and
compressor is operating
but fan is not.
Internal power failure at fan
wire harness or PC board.
Inspect wire harness and
replace harness or PC board
as needed.
Type III—The concentrator runs and
continues to cycle but has low oxygen
concentrations and no alarms are
activated.
This problem is similar to Type I in the way it is diagnosed/resolved. Observe
pressure cycle at oxygen tank as recommended in Type I.
LT-2329
14
TROUBLESHOOTING
OTHER SYMPTOMS POSSIBLE CAUSE POSSIBLE REMEDY
Pulsating air noise Intake filter not in place or defective Check filter and replace if necessary
Compressor intake hose disconnected Reconnect hose
Excessive noise Loose or defective motor mounts Replace motor mounts
Mounting plate loose Reinstall or replace mounting plates
Defective compressor Replace compressor
Defective cooling fan Replace cooling fan
Fluctuating oxygen ow Occluded humidier Clean or replace humidier
Use of improper humidier Use only a bubble-type humidier designed for use with ows up to 10
liters per minute and 20 psi pressure
Occluded filters Clean or replace filters
Occluded or defective cannula and tubing Detach cannula from oxygen delivery tubing. If proper flow is not
attained, check tubing for kinks or other obstructions. Clean or straighten
as required or replace tubing if necessary
Use of excess oxygen tubing The unit is designed to deliver 10 lpm with a cannula on 50 feet (15
meters) of approximately 5/32” (4 mm) inside diameter tubing. Smaller
diameter tubing or the addition of any other ow restriction may prevent
obtaining the desired ow rate.
Defective ow meter Replace ow meter
Leak in system Check for leaks in all hoses and ttings
Defective compressor Replace compressor
Defective compressor reed valve Replace compressor reed valve
Defective check valve Replace check valve or manifold
Pressure regulator not adjusted properly or defective Adjust or replace pressure regulator
Little or no oxygen ow Flow meter not adjusted properly Adjust ow meter
Hose disconnected to ow meter Reconnect hose
Oxygen delivery tubing is kinked or blocked Straighten tubing or remove obstruction
Occluded humidier Clean or replace humidier
Low oxygen concentration Leak in system Check for leaks in all hoses and ttings
Defective sieve bed check valve Replace check valve or manifold
Defective compressor reed valve Replace compressor reed valve
Defective compressor Replace compressor
Rotary valve not operating correctly Replace valve
Occluded lters Clean or replace lters
Contaminated sieve beds Replace sieve beds
Audible alarm does not sound during power
failure
Unit has not been used for an extended period of time.
NOTE–If the concentrator has been unused for an
extended period, the unit must run several minutes before
the power fail alarm will activate.
Allow unit to run for 20 minutes and retry
Defective PC board Replace PC board
Defective power switch Replace power switch
Defective wire harness Replace wire harness
Audible alarm does not sound when unit is
turned “On”
Defective PC board Replace PC board
Pressure relief valve activated “popping” sound PC board connectors not properly latched Be sure tabs are pushed completely into place
Defective PC board Replace PC board
Defective rotary valve Replace valve
Service Required light does not illuminate when
unit is turned “On”
PC board connectors not properly latched Be sure tabs are pushed completely into place
Defective PC board Replace PC board
Visible Alarm Audible Alarm Compressor
OFF OFF ON
TROUBLESHOOTING CHART A
15
LT-2329
TROUBLESHOOTING
TROUBLESHOOTING CHART B
Visible Alarm Audible Alarm Compressor
Blinking Pulsing OFF
OTHER SYMPTOMS POSSIBLE CAUSE POSSIBLE REMEDY
Fan off Line cord not properly installed or defective Insert plug in receptacle or replace line cord. On 220/230/240
Volt units, check that the IEC connector on the back of the unit is
attached.
No power at receptacle Check building circuit breaker or fuse, or have house wiring
checked by qualified electrician Circuit may be fully loaded with
other appliances and another receptacle may be required.
Oxygen concentrator circuit breaker activated Press the circuit breaker reset button. If unit circuit breaker opens again,
check internal wiring.
Line cord quick-connect terminal inside unit is
disconnected Reconnect quick-connect terminal
Defective power switch Replace power switch
Defective circuit breaker Replace circuit breaker
TROUBLESHOOTING CHART C
Visible Alarm Audible Alarm Compressor
Blinking Pulsing ON
OTHER SYMPTOMS POSSIBLE CAUSE POSSIBLE REMEDY
Fan and compressor operating
Pressure relief valve activated – “popping”
sound
Connector on PC board not connected Connect connector
Defective PC board Replace PC board
Defective valve or valve wire harness Replace valve or valve wire harness
TROUBLESHOOTING CHART D
Visible Alarm Audible Alarm Compressor
ON ON OFF
OTHER SYMPTOMS POSSIBLE CAUSE POSSIBLE REMEDY
Fan operating Main wiring harness disconnected/defective Reconnect/replace wiring harness
Loose compressor wire Tighten or attach wire
Defective capacitor Replace capacitor
Defective compressor Replace compressor
Unit warm to the touch and cannot be
restarted for several minutes
Compressor overheated due to:
1. Occluded lters 1. Clean or replace lters
2. Restricted input or output air passage 2. Remove obstruction
3. Low or high line voltage 3. Check line voltage; use alternate circuit independent of other
appliances
Defective cooling fan Replace cooling fan
Defective compressor Replace compressor
LT-2329
16
TROUBLESHOOTING
TROUBLESHOOTING CHART E
Visible Alarm Audible Alarm Compressor
ON ON ON
OTHER SYMPTOMS POSSIBLE CAUSE POSSIBLE REMEDY
Fluctuating or no ow System pressure below 20 psi (138 kPa) due to:
1. Leak in system 1. Check for leaks in all hoses and ttings
2. Defective compressor 2. Replace compressor
TROUBLESHOOTING CHART F
Visible Alarm Audible Alarm Compressor
See Below See Below ON
OTHER SYMPTOMS POSSIBLE CAUSE POSSIBLE REMEDY
No OSD lights are illuminated. Defective OSD/PC Board. Check concentration with an oxygen analyzer. If the concentration is
within specification, replace the PC board.
Yellow Low Oxygen Light and the Red
Service Required Light are illuminated
accompanied by a beeping audible alarm
Oxygen level is low* Check concentration with an oxygen analyzer. If the concentration is
within specication, replace the PC board. If the concentration is low,
refer to low oxygen concentration symptom in Troubleshooting Chart A.
Red Service Required light is illuminated
with beeping audible alarm.
Defective OSD Replace PC board.
Yellow Low Oxygen light is illuminated. Oxygen level is low* Check concentration with an oxygen analyzer. If the concentration is
within specication, replace the PC board. If the concentration is low,
refer to low oxygen concentration symptom in Troubleshooting Chart A.
Yellow Low Oxygen light is illuminated and
an intermittent audible alarm sounds every
few seconds.
Oxygen level is low* Check concentration with an oxygen analyzer. If the concentration is
within specication, replace the PC board. If the concentration is low,
refer to low oxygen concentration symptom in Troubleshooting Chart A.
*Refer to Alerts page for oxygen purity levels.
NOTE-If unit does not run or perform to specication, verify the proper AC input voltage and frequency are being used.
17
LT-2329
COMPONENT TESTING, REPAIR AND REPLACMENT
PROPER REPAIR PROCEDURES
WARNING
When servicing the Drive DeVilbiss Oxygen Concentrator, be
absolutely certain that the correct tools are used and that the parts
are free of oil and grease or any material not compatible with oxygen.
Teon®tape is recommended and must be applied to the male
threads omitting the rst thread to eliminate the possibility of tape
particles entering the oxygen system.
Electric shock hazard. Do not remove cabinet. The cabinet should
only be removed by a qualied Drive DeVilbiss homecare provider.
Disconnect the power cord from the wall outlet before attempting
repairs on the unit. Extra care should be taken if it is necessary to
operate the unit with the cabinet removed.
NOTE–Be sure to read all of the steps involved before beginning any of the
procedures in this manual.
NOTE– After repairing or replacing a component, run the unit for 20 minutes,
check the oxygen concentration and test for leaks.
The DeVilbiss Oxygen Concentrator is designed for ease of service. To aid
service personnel a Service Kit (part #444-501) is available which contains the
necessary gauges, tools, and testing instruments to properly service the oxygen
concentrator. See list below.
In addition, you will also need an oxygen analyzer (part #R217P62) to
periodically check oxygen concentration levels and leak test solution.
The following parts are included in the Service Kit:
1Slotted bit
1#1 Phillips bit
1#2 Phillips bit
1Crescent wrench
18” Duckbill pliers
1 Voltmeter
2Pressure/Vacuum gauge
1Tool box
2Test Fittings
1Torx screwdriver w/bits
1Channel Lock Pliers
11/4” Ratchet wrench
110mm Socket l/4” Drive
11/4” Drive extension
1Plastic storage case
CABINET REMOVAL
The majority of all the servicing and repairs can be done without removing the
front cabinet completely. However, it may be loosened or removed to gain access
to the components behind it.
To remove back cabinet:
1. Unplug the unit from the wall outlet.
2. Remove the six screws that secure the back cabinet – 2 behind handle, 2
near the bottom, and 1 on each side.
NOTE– All six screws are the same size.
3. Remove the back cabinet by sliding it toward the rear until clear.
4. To reassemble, reverse steps 2-3.
To loosen the front cabinet:
5. Remove the two screws (located directly above the intake bacteria lter)
that hold the front cabinet to the unit’s internal structure.
6. Remove the screw located near the bottom of the recessed humidier
compartment on the front of the unit. The top of the front cabinet can now
be tilted forward to allow access to the components behind it.
To remove the front cabinet completely:
7. Tilt cabinet forward.
8. Before disconnecting the wires from the power switch and circuit breaker
note their positions in order to reconnect them properly; then disconnect the
wires.
9. Disconnect the hose at the bottom of the ow meter and remove cabinet.
10. To reassemble reverse steps 5 – 9 making sure bottom of cabinet is
inserted securely in base of unit.
NOTE– Two types of cabinet screws are used in the 1025 models, thread-
forming screws and machine screws. Do not overtighten the thread-forming
screws; they should be torqued to 18 –20 in-lbs. The machine screws have much
ner threads and are used in conjunction with brass inserts that are molded into
the cabinet part; they should be torqued to 20 – 25 in-lbs.
When replacing a cabinet part such as the front cover, base or compressor box
be sure to use the correct screw. The ne threaded machine screws should
always be used if there is a brass insert. Thread-forming screws should be used
if there is no brass insert molded into the cabinet part.
These screws are not interchangeable, so be sure to order the correct part
number. See gure below.
Thread-forming
Cabinet Screw
(525DD-636)
Machine Cabinet
Screw (525DD-628)
ACCUMULATOR TANK
The oxygen accumulator tank holds the concentrated oxygen and releases it to
the patient at a specied liter ow.
ACCUMULATOR PRESSURE TEST
To check accumulator pressures:
1. Make sure the unit is “Off.”
2. Use the Cabinet Removal instructions listed previously to open the unit for
testing.
3. Use the pressure gauge (part #PVO2D-601) and pressure test assembly
(part #303DZ-637) included in the Service Kit.
Pressure Gauge
Pressure Test
Assembly
LT-2329
18
COMPONENT TESTING, REPAIR AND REPLACMENT
4. Remove the tubing cap from the accumulator tank tting or from the
manifold attached to the tank, and attach the 1/16" (1.6 mm) diameter
tubing from the gauge to the tting just vacated above.
See Figures below showing pressures being checked at accumulator tank
"T" tting and manifold.
Accumulator "T" Fitting Manifold
5. Turn the unit “On” with the ow rate set to maximum recommended ow,
which is 10 lpm. Allow the unit to run for 5 minutes before observing the
pressures. During each timed cycle, the average pressure in the oxygen
accumulator will rise and fall. The high pressures should be consistent and
the low pressures should be consistent. The pressure swing will be
approximately 4-5 psi.
NOTE– Expected normal pressures observed depend on altitude and ow
rate. See the Typical Peak Accumulator Tank Pressure Range chart below.
• Increases in altitude and ow rate will slightly decrease accumulator
pressures.
• Lower altitudes and ow rates will slightly increase accumulator pressures.
NOTE– A defective check valve in the purge harness may cause a rapid drop
in accumulator pressure below the minimum value.
TYPICAL PEAK ACCUMULATOR TANK PRESSURE RANGE @ 10LPM
Altitude Psi kPa
0 to 457 m
0 to 1500 ft. 25-36 172-248
457 to 914 m
1500 to 3000 ft. 21-33 145-228
914 to 1524 m
3000 to 5000 ft. 21-30 145-207
6. Refer to the Type 1 – Purity Issues, found under Simplied Troubleshooting,
to determine the appropriate action to take in resolving abnormal pressure
cycles.
NOTE– A defective compressor will be indicated by slowly rising pressure.
Pressure may only reach a certain level and then stop.
Low oxygen concentration levels and accumulator pressures higher than normal
may indicate defective sieve beds. Severely contaminated beds may also cause
the pressure relief valve on the compressor to open.
NOTE– A malfunctioning rotary valve may also cause high accumulator tank
pressure and activation of the pressure relief valve. In this case it should be
determined whether the problem is with the sieve beds, valve, or both.
AUXILIARY OXYGEN PORT
All 1025 series concentrators are manufactured with an auxiliary oxygen port
located on the back of the unit.
To ll oxygen cylinders:
This external port can be used to ll oxygen cylinders with an FDA-cleared
cylinder lling device that is designed to use oxygen from a concentrator to
ll a cylinder. The port is only for use with FDA-cleared lling devices with
compatible oxygen input specications.The ow meter should be set at 6
LPM or less when the concentrator is being used during cylinder ll. The
port does not affect concentrator performance if properly used. See gures
below.
Auxiliary Port Output Specications:
Outlet Pressure ........................................ <15 psi
Outlet Flow ............................................. 2.0 LPM
Outlet Oxygen ..............................................>90%
Operation Time ...................................Continuous
Refer to the cylinder lling device instruction guide for the oxygent input/output
specications, connection and operating instructions.
Transfill Hose
(PF1100TUB) Auxiliary Port Transfiller Caddy
(525DD-650)
WARNING
When using the Transller Caddy with a Transll device, always keep
the system on a at surface. Disassemble the system prior to
moving.
CAPACITOR
The capacitor enables the compressor to start and run by supplying voltage to
the windings of the compressor motor. A defective capacitor will result in the
compressor running slower or not starting.
CAUTION
The 1025DS concentrators use a GSE compressor with a 60 mfd
capacitor. If replacement is necessary, be sure the correct capacitor
is installed.
CAUTION
The 1025KS/1025UK concentrators use a GSE compressor with a
17.5/15 mfd capacitor respectively. If replacement is necessary, be
sure the correct capacitor is installed.
WARNING
Electric Shock Hazard. When replacing the capacitor, do not touch
the terminals or allow metal objects to come in contact with the
terminals on the capacitor. The capacitor may hold a charge for
several days after the unit is turned off.
If a defective capacitor is suspected, a new one must be installed. The capacitor
is located beside the intake lter or next to the cooling fan in the base of the unit.
To replace the capacitor:
1. Make sure the unit is unplugged from the wall outlet.
2. Remove the back cabinet and also loosen the front cabinet and tilt it
forward. Use the cabinet removal instructions listed previously.
3. Disconnect the two wires from the terminals on the capacitor.
4. Cut the nylon cable tie holding the capacitor in place and remove the
capacitor.
5. Install the new capacitor and secure with a new cable tie.
6. Reconnect the wires to the new capacitor.
7. Replace both cabinets and secure with screws.
19
LT-2329
COMPONENT TESTING, REPAIR AND REPLACMENT
CHECK VALVES / MANIFOLD
Manifold And Sieve Bed Check Valves
The manifold check valves, located in the manifold attached to the accumulator
tank, and the sieve bed check valves, located in the purge harness between the
outlet of each sieve bed and the accumulator tank, allow oxygen to pass from the
sieve beds to the accumulator tank when the bed pressure is greater than the
accumulator tank pressure. These valves also prevent reverse ow of oxygen
from the accumulator tank to the sieve beds.
The manifold also directs a small amount of pressurized oxygen into the
discharging sieve bed to aid the nitrogen exhaust process. The purge harness
includes a xed orice that performs the same function.
A defective manifold or sieve bed check valve will result in lower oxygen
concentrations and accumulator pressures.
Use the Accumulator Pressure Test listed previously to troubleshoot manifold or
sieve bed check valves.
• To replace a defective sieve bed check valve, remove the tubing on either
side of it and install a new valve making sure the outlet end is toward the
accumulator tank.
• To replace a defective manifold check valve, replace the manifold.
NOTE– Also see Manifold section on page 22.
COMPRESSOR
The Drive DeVilbiss Oxygen Concentrator uses a double-head, oil-free
compressor. The compressor is secured to the base with a mounting plate and
four motor mounts.
Electrical Connector
Exhaust Fitting
Intake Fitting
Pressure Relief Valve
Changes were made to the original compressor in January, 2020. These changes
include a redesigned valve plate and sleeve with heat sink. All 1025 models now
have the updated compressor. See gures below.
(Updated compressor
with redesigned valve
plate and sleeve.)
Sleeve w/Heat Sink Valve Plate
A compressor that is worn or defective may:
• cause pressure to rise slowly.
• cause excessive noise and/or vibration.
• cause lower oxygen concentrations.
A worn or defective compressor can be caused by a defective internal
component such as:
• reed valve
• o-ring
• gasket
• cup seal
These components are included in the Compressor Rebuild Kit (1025D-643 and
1025K-643).
Sleeve
Rod Screw
Cup Seal
Cup
Retainer
Valve Plate
Bottom Reed
Valve & Retainer
O-Ring
Sleeve
Top Reed Valve
& Retainer
Head Gaskets
Intake Fittings
PR
Valve
Head Screw
Connecting
Tubes
Exhaust
Fitting
NOTE– A built-in thermal cutoff switch will shut the compressor off if it
becomes overheated. This protects the compressor from damage caused by heat
build-up. (Some models have an auxiliary thermostat mounted within the
compressor compartment.) Should this condition occur, the compressor will
require several minutes for the thermo-protective device to reset.
NOTE– A pressure relief (PR) valve is located on the pressure head to
prevent high pressure build up in the system should a component malfunction
occur.
LT-2329
20
COMPONENT TESTING, REPAIR AND REPLACMENT
To test the compressor operating voltage:
The compressor requires line voltage to operate. If the compressor does not start
when the unit is turned on, the voltage input must be tested:
1. This voltage can be checked at the compressor connector using an AC
voltmeter or test light connected to the brown and blue wires. The voltmeter
is the best way to test.
Testing Compressor Voltage
Voltmeter Leads
2. If no voltage is detected, disconnect power and check for loose or broken
wires between the compressor connector and switch or wire harness.
3. If there is voltage at the compressor connector, then either the capacitor or
the compressor itself is defective.
To test the compressor for proper output:
NOTE– If the compressor is not providing a high enough output the patient
alert system may be activated.
1. Use the Cabinet Removal instructions listed previously to open the unit for
testing.
2. Use the Accumulator Pressure Test listed previously to observe the high
pressures, low pressures and the pressure drop.
3. Refer to the Type 1 – Purity Issues, found under Simplied Troubleshooting,
to determine the appropriate action to take in resolving abnormal pressure
cycles.
NOTE– A compressor, which slowly builds pressure that remains below 25
psi, indicates worn cup seals and/ or reed valves.
If these conditions are observed then:
• The unit lter(s) may be occluded—check the air lter, compressor lter,
and intake lter for occlusions.
• There may be a severe leak in the system—check for air leaks using a leak
detection solution such as Snoop®or equivalent (must not contain ethylene
glycol).
CAUTION
Do not apply leak test solution to any part of the rotary valve or the
main PC Board assembly.
• The compressor reed valves, cup seal, or the compressor itself may be
defective.
If the lters are not occluded and no leaks are found, the compressor must then
be removed and repaired or replaced.
To remove the compressor:
1. Make sure the unit is unplugged from the wall outlet.
2. Use the Cabinet Removal instructions listed previously to open the unit.
3. Disconnect the compressor wires by disconnecting the compressor
electrical connector.
4. Remove compressor lter by loosening hose clamps and removing hoses
from compressor exhaust tting and heat exchange tube. This can be done
using a 1/4" nut driver or at screw driver.
5. Rotate heat exchange tube to the right 90˚.
6. Disconnect intake hose from intake lter.
7. Carefully lean unit backwards slightly in order to access motor mount nuts
on the bottom. Using a 10 mm nut driver or socket wrench remove the four
motor mount hex nuts.
8. Place unit in upright position and carefully lift the compressor and mounting
plate assembly out of the compressor box.
CAUTION
If the unit has been running recently, the compressor may be hot.
9. Disconnect the intake hose from both intake ttings on compressor.
Intake Hose
10. Turn compressor upside down and place on work surface.
11. Remove both retaining plates, one on each side of the compressor.
Retaining Plates x2
Motor Mounts
x4 Mounting
Bolts x4
Mounting
Plates x2
12. Inspect motor mounts to see if they are torn or damaged. If necessary,
remove the motor mounts by unscrewing them from the mounting plates by
hand. Install new ones; hand tighten only.
NOTE– If compressor is being replaced, mounting plates need removed. Use
a 3/8" socket to remove mounting plate bolts.
This manual suits for next models
2
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