Invacare 3-6 Service manual

INV ACARE

OXYGEN CONCENTRATORS

INVACARE 3 & 5

Model 3LX Model 5LX

INV ACARE 5 & 6

Model 5LXO2 Model 5LXO2T Model 6LXO2 Model 6LXO2T Model 6LXO2H Model 6LXO2HT

with

SensO

with

SensO

with

SensO

SERVICE MANUAL

DEALER: KEEP THIS MANUAL. THE PROCEDURES IN THIS MANUAL MUST BE PERFORMED BY AN AUTHORIZED DEALER ONLY.

SPECIAL NOTES

S P

WARNING/CAUTION notices used in this manual apply to hazards or unsafe practices

which could result in personal injury or property damage.

THE INFORMATION CONTAINED IN THIS DOCUMENT IS SUBJECT TO CHANGE WITH-

OUT NOTICE.

L N

O T E S

NOTICE

WARNING

DO NOT OPERATE THIS EQUIPMENT WITHOUT FIRST

READING AND UNDERSTANDING THIS MANUAL. IF YOU

ARE UNABLE TO UNDERSTAND THE W ARNINGS AND

INSTRUCTIONS, CONTACT A HEAL THCARE

PROFESSIONAL (DOCTOR - THERAPIST) BEFORE

ATTEMPTING TO USE THIS EQUIPMENT - OTHERWISE

INJUR Y OR DAMAGE MAY RESULT.

SAVE THESE INSTRUCTIONS

TABLE OF CONTENTS

SPECIAL NOTES .................................................2

SAFETY SUMMARY ............................................. 4

FEA TURES...... .....................................................7

SPECIFICA TIONS ................................................8

Recommended End-User Guidelines

for Optimum Performance .............................9

SHIPPING AND HANDLING INSTRUCTIONS ...... 10

INST ALLA TION / SEQUENCE OF OPERA TION... 11

SENS

O2 OXYGEN SENSOR TECHNOLOGY

CERAMIC ZIRCONIA SENSOR ..................... 12

Technical Description .................................. 12

Operating Sequence....................................12

Pneumatic Diagram ..................................... 13

TROUBLESHOOTING GUIDE ............................14

REP AIR/REPLACEMENT GUIDE ........................ 21

PROCEDURE 1 - REMOVING CABINET .............21

PROCEDURE 2 - PREVENTIVE

MAINTENANCE.................................................. 22

Cabinet Filters ............................................. 22

Inlet Filter .....................................................22

Bacteria Filter .............................................. 22

Exhaust Muffler Canister/

Exhaust Muffler ........................................... 23

Cleaning Finned Heat Exchanger ................ 23

Compressor T op End Rebuild - 3 Liter

Rebuilding Thomas Model 2638 or

2618..........................................................24

Compressor T op End Rebuild - 5 and 6 Liter

Rebuilding Thomas Model 2639 or

2619..........................................................29

Rebuilding Thomas Model 2650................33

Preventive Maintenance Record ..................37

PROCEDURE 7 - REPLACING COMPRESSOR

ASSEMBL Y OR CAP ACITOR....................... 43

Replacing Compressor Assembly............... 43

Replacing Capacitor ................................... 43

PROCEDURE 8 - REPLACING HEA T

EXCHANGER.............................................. 44

PROCEDURE 9 - REMOVING CONTROL

P ANEL ........................................................ 45

PROCEDURE 10 - REPLACING COOLING

FAN............................................................. 46

PROCEDURE 11 - REPLACING P.C.

BOARDS..................................................... 48

PROCEDURE 12 - REPLACING

TRANSFORMER ASSEMBL Y ...................... 50

PROCEDURE 13 - REPLACING ON/OFF

SWITCH ...................................................... 51

PROCEDURE 14 - REPLACING

FLOWMETER ............................................. 52

PROCEDURE 15 - REPLACING HOUR

METER ....................................................... 53

PROCEDURE 16 - REPLACING 4-WAY

V ALVE/MANIFOLD ASSEMBL Y/PILOT

VALVES...................................................... 54

Replacing 4-way Valve................................ 54

Replacing 4-way Valve Manifold

Assembly.................................................... 54

Replacing Pilot Valve Poppets and "O"

Rings .......................................................... 56

PROCEDURE 17 - SENSO2 ALARM

INDICA TORS AND SWITCH ......................... 58

PROCEDURE 18 - TIMING INV ACARE 5 AND

INV ACARE 6 CONCENTRATORS................ 59

T A B L E

C O N

T E N

T S

PROCEDURE 3 - REPLACING P.E. VALVE

(5LX/6LX/5LXO2/6LXO2) ............................. 38

PROCEDURE 4 - REPLACING SIEVE BEDS ....... 39

PROCEDURE 5 - REPLACING CHECK V AL VES ....40

PROCEDURE 6 - REPLACING/ADJUSTING

REGULA TOR ...............................................41

Replacing Regulator .................................... 41

Adjusting Regulator .................................... 42

PROCEDURE 19 - LEAK TEST ......................... 62

PROCEDURE 20 - ALARM AND SENSOR

TEST .......................................................... 63

PROCEDURE 21 - SIEVE BED PRESSURE

T AP-IN KIT INSTALLA TION AND BED

PRESSURE CHECK.................................... 67

WARRANTY ...................................................... 71

SAFETY SUMMARY

READ THE FOLLOWING INFORMATION BEFORE OPERATING THIS PRODUCT.

A F E

The use of oxygen therapy requires that special care be taken to reduce the risk of fire. Any

materials that will burn in air, and some that will not, are easily ignited and burn rapidly in high

concentrations of oxygen. For safety concerns, it is necessary that all sources of ignition be kept away from the product and preferably out of the room in which it is being used. NO SMOKING

signs should be prominently displayed.

A spontaneous and violent ignition may occur if oil, grease or greasy substances come in contact

with oxygen under pressure. These substances MUST be kept away from the oxygen concentra-

tor, tubing and connections, and all other oxygen equipment. DO NOT use any lubricants unless

recommended by Invacare.

For optimum performance, Invacare recommends that each concentrator be on and running for

a minimum of 30 minutes at a time. Shorter periods of operation may be harmful for maximum product life.

If it has a damaged cord or plug, if it is not working properly, if it has been dropped or damaged, or dropped into water, call Qualified Service Personnel for examination and repair.

W ARNING

Keep the cord away from HEATED or HOT surfaces. NEVER drop or insert any object into any opening. NEVER block the air openings of the product or place it on a soft surface, such as a bed or couch,

where the air opening may be blocked. Keep the openings free from lint, hair and the like. Fill humidifier with water to the level shown by the manufacturer. DO NOT overfill. Invacare recommends that Crush-Proof oxygen tubing (supplied by Invacare) be used with this

product and NOT exceed 50 ft. (15.2m) in length.

MAINTENANCE The Invacare Oxygen Concentrator was specifically designed to minimize routine preventative

maintenance at intervals of once per year. Only professionals of the healthcare field or persons fully conversant with this process such as authorized or factory trained personnel should perform preventative maintenance or performance adjustments on the oxygen concentrator.

RADIO FREQUENCY INTERFERENCE Most electronic equipment is influenced by Radio Frequency Interference (RFI). CAUTION should

be exercised with regard to the use of portable communications equipment in the area around such equipment.

SAFETY SUMMARY

SAFETY SUMMARY (Continued)

TO REDUCE THE RISK OF ELECTROCUTION.

WARNING

ALWAYS unplug this product IMMEDIATELY after using. Avoid using while bathing. If continuous usage is required by the physicians prescription:

The concentrator must be located in another room at least seven (7) feet from the bath. DO NOT come in contact with the concentrator while wet. DO NOT place or store product where it can drop into water or other liquid. DO NOT reach for product that has fallen into water. UNPLUG IMMEDIATELY.

TO REDUCE THE RISK OF BURNS, ELECTROCUTION, FIRE OR INJURY TO PERSONS.

WARNING This device is to be used only in accordance with the prescription of a physician and this Owners Manual. If at any time the patient or attendant conclude that the patient is receiving an insufficient amount of oxygen, the supplier and/or physician should be contacted immediately. No adjustments should be made to the flowrate unless prescribed by a physician.

S A

Y S

U M M A R Y

A product should NEVER be left unattended when plugged in. Close supervision is necessary when this product is used by, on or near children or bed

confined individuals. Use this product for only intended use as described in this manual.

DO NOT use unauthorized parts, accessories or adapters other than those authorized by Invacare.

SAFETY SUMMARY

GROUNDING INSTRUCTIONS

A F E T Y

A. This product should be grounded. In the event of an electrical short circuit, grounding

reduces the risk of electric shock by providing an escape wire for the electrical current. This product is equipped with a cord having a grounding wire with a grounding plug. The plug must be plugged into an outlet that is properly installed and grounded.

SAFETY SUMMARY (Continued)

IMPROPER USE OF THE GROUNDING PLUG CAN RESULT IN A RISK OF ELECTRICAL SHOCK.

If repair or replacement of the cord or plug is necessary, do not connect the grounding wire to

either flat blade terminal. The wire with insulation having an outer surface that is green with or

without yellow stripes is the grounding wire. Check with a qualified electrician or serviceman if the grounding instructions are not completely understood, or if doubt exists as to whether the

product is properly grounded.

B. This product is for use on a normal 120 V circuit and has a grounding plug that looks like

the plug illustrated in sketch A shown at the bottom of the page. A temporary adapter, which looks like the adaptor illustrated in sketches B and C, may be used to connect this plug to a 2-pole outlet as shown in sketch C if a properly grounded outlet is not available. The temporary adaptor should be used only until a properly grounded outlet (sketch D) can be installed by a qualified electrician. The green colored rigid ear, lug and the like extending from the adapter must be connected to a permanent ground such as properly grounded outlet box cover. Whenever the adapter is used, it must be held in place by the screw.

Grounding

Tab for Grounding Screw

DANGER

Adapter

Metal Screw Grounded

Outlet Box

Grounded Outlet

A B C D

Oxygen Outlet

Flowmeter

Elapsed Time

Meter

Power Indicator Light

FEATURES

Power Switch

Circuit Breaker

Cabinet Filter (2) ea.

FEATURES

F E A T U R E S

FEATURES - 3LX, 5LX

Oxygen Outlet

Flowmeter

Power Switch

Power Indicator

Light

Elapsed Time

Meter

SensO2 Status Indicator Lights (5LXO2,

5LXO2T , 6LXO2 and 6LXO2T ONL Y)

Circuit Breaker

Cabinet Filter (2) ea.

FEATURES - 5LXO2, 5LXO2T, 6LXO2, 6LXO2T

SPECIFICATIONS

S P E C

C A T

N S

SPECIFICATIONS

STANDARD SPECIFICATIONS Electrical Requirements: 120 VAC Rated Current Input: 4.0 A (ALL Models)

Sound Level: 52 dB Average (3LX)

53 dB Average (5LX, 5LXO2, 5LXO2T, 6LXO2, 6LXO2T)

Operating Altitude: Up to 6,000 ft. (1828 meters) above sea level without degradation of

performance. From 6,000 ft. (1828 meters) to 13,129 ft. (4000 meters) below 90% efficiency.

Ambient Temperature Range: 50 *Oxygen Output Concentration

Levels: ALL MODELS

Maximum Outlet Pressure: (5LX, 5LXO2, 5LXO2T, 6LXO2, 6LXO2T) (3LX)

Sens

O2 Alarm Thresholds:

95.6% to 87% at all flowrates.

* Stated performance maximum achieved after 30 min. of run time.

5 psi (34.5 kPa + 3.45 kPa.) (34.5 kPa + 3.45 kPa.)

+10% (132 VAC/108 VAC), 60 Hz

F - 95OF (10O - 35OC)

+ 0.5 psi. 5 psi + 0.5 psi.

Indicators

O2 Purity

Internal Switch

*Set at 73%

Internal Switch

Set at 85%

If no internal selector switch, 73%

operation ONLY.

Flow Range:

Power Consumption:

Pressure Relief Mechanism Operational at:

Over 85% (+ 2%)

73% (+ 3%) to 85% (+2%)

Below 73% (+ 3%)

1/2 - 5 L/min. (5LX, 5LXO2, 5LXO2T, 6LXO2, 6LXO2T) 1/2 - 3 L/min. 3LX) For flow rates less than 1/2 L/min., use the Invacare Pediatric Flowmeter

PF16. 460W (6LXO2, 6LXO2T) 350W/400W (3LX)

400W (5LX, 5LXO2, 5LXO2T)

35 psi + 3.5 psi (241 kPa + 24.1 kPa)

GREEN Indicator Light

YELLOW Indicator Light

RED Indicator Light -

Continuous Audible Alarm Sieve GARD Compressor Shutdown

* Factory Preset at 73%

GREEN Indicator Light

RED Indicator Light -

Continuous Audible Alarm Sieve GARD Compressor Shutdown

N/A

SPECIFICATIONS

SPECIFICATIONS, CONTINUED

Filters: Cabinet

Compressor Inlet Bacteria

Safety Systems: Current overload or line surge shutdown.

High temperature compressor shutdown. High pressure alarm w/compressor shutdown. Low pressure alarm w/compressor shutdown. Battery Free

Sens

O2 Oxygen System (5LXO2, 5LXO2T, 6LXO2, 6LXO2T ONLY).

Width: 18-inches (45.7 cm) Height: 23.75-inches (60.3 cm) Depth: 14-inches (35.6 cm)

Weight: 54 lbs. (24.5 kg) (All 5LX and 6LX Models) 53 lbs. (23.9 kg.) (3LX) Shipping Weight: 59 lbs. (27 kg) (All 5LX and 6LX Models) 58 lbs. (26.1 kg.) (3LX)

Operating Temperature

Exhaust: Less than Ambient + 35 Oxygen Output: Less than Ambient + 4O F (+2O C)

Power Loss Alarm.

F (+16O C)

S P E C

I C A T

O N

Cabinet: Impact Resistant flame-retardant plastic cabinet. Regulatory Listing: ETL certified complying with applicable portions of UL 1431

RECOMMENDED END-USER GUIDELINES FOR OPTIMUM PERFORMANCE:

Temperature: 50 Electrical: No extension cords. Placement: No closer than 3-inches from any wall. Tubing: Crush-Proof Tubing - 50 feet (15.2 m.) maximum (do NOT pinch). Room Characteristics: Smoke and soot-free

Relative Humidity: 20 to 60% Time of Operation: Up to 24 hours per day.

- 95OF (10O - 35OC)

No confined spaces (closet).

SHIPPING AND HANDLING

This Service Manual describes, in detail, the Invacare 3, 5 and 6 Oxygen Concentrators. It has been

carefully written to explain concentrator operation, service and preventative maintenance. Before

you install and operate the concentrator, please refer to OWNER'S MANUAL.

The Invacare concentrator should always be kept in the upright position to prevent cabinet damage while

being transported. The shipping container has been designed to assure maximum protection of the con-

centrator.

If the concentrator is to be reshipped by common carrier, it should be packed in a new carton. Additional

cartons are available from Invacare.

The air compressor suspension system has been engineered to withstand severe motion and orientation.

UNP ACKING (FIGURE 1)

1. Check for any obvious damage to the carton or its contents. If damage is evident, notify the carrier, or

Invacare.

SHIPPING AND HANDLING INSTRUCTIONS

2. Remove all loose packing from the carton.

3. Carefully remove all the components from the carton.

NOTE: After inspection, unless the Invacare Oxygen Concentrator is to be used immediately, retain carton and packing materials for use in storing until use of the concentrator is required.

INSPECTION

1. Examine exterior of the Invacare Oxygen Concentrator for nicks, dents, scratches or other damages. Inspect all components.

STORAGE

1. Store the repackaged Invacare Oxygen Concentrator in a dry area.

2. DO NOT place other objects on top of the repackaged concentrator.

Relief for Flowmeter to face Front of Unit.

Relief for Line Cord to face Back of Unit.

FIGURE 1 - UNPACKING

INST ALLATION/SEQUENCE OF OPERATION

INSTALLATION / SEQUENCE OF OPERATION

MODEL 3LX and MODELS 5LX,5LXO2, 5LXO2T, 6LXO2, 6LXO2T

INST ALLATION / VERIFICATION OF BATTERY FREE

When your new Invacare concentrator arrives, it should be checked for proper operating conditions.

1. If the unit has been in below-freezing temperatures, allow it to warm up to room temperature (approxi- mately 30 minutes) before operating.

2. The concentrator will need to be turned on for 4 to 5 seconds to charge the Battery Free Connect power cord to outlet and turn the concentrator on. Turn flow control knob counterclockwise and flow will begin immediately. Set flow rate of the Invacare 3 to 3 L/min., Invacare 5 to 5 L/min. and the Invacare 6 to 6 L/min. Turn unit off.

3. Unplug the power cord and press On/Off switch to the ON position. An intermittent audible alarm will sound. This confirms proper operation of the Battery Free OFF.

4. Connect cord to outlet and turn on concentrator. Unit will sound 3 BEEPS on startup.

POWER LOSS ALARM

Power Loss Alarm. Turn On/Off switch

Power Loss Alarm.

S T

L L

I O N

5. Check the oxygen concentration per specifications after 30-40 minutes running time.

SEQUENCE OF OPERA TION

Applying 120 VAC via the power switch energizes the compressor motor, hour meter, cooling fan and the printed circuit (P.C.) board.

Room air enters the compressor via the cabinet filter, compressor inlet filter, and sound muffler. The air is compressed by the wobble pistons in the compressor to a pressure of 20 PSI (137.72 kPa) BEFORE Serial No. "97K" or 21 PSI (144.79 kPa) AFTER Serial No. "97K".

As increased pressure creates increased temperature, a heat exchanger is utilized to lower the tempera-

ture by 20

F (6.7O C) before the air enters the 4-way valve. It is then channeled to a sieve bed containing the adsorption material. A restrictor downstream of the sieve bed causes pressure to build up inside the sieve bed which is necessary for the adsorption process. A small amount of relatively pure oxygen enters the top of the second bed with the balance entering a storage tank. The nitrogen removed is exhausted back from the bed through the four-way valve into room air. A muffler is located at the exhaust end of the valve to muffle the sound of the exhaust as it exits the concentrator.

The oxygen not being used to exhaust is channeled into the storage tank. The pressurized oxygen is regulated down to 5 PSI (34.4 kPa), enters an accurate flow-measuring device, flows through a bacterial filter, a check valve and out to the patient.

The electrical activation of the 4-way valve is accomplished every 8 to 21 seconds by the pressure sensor and P.C. board electronics when the pressure set point of 20

+ 3 PSI (137.72 + 51.32 kPa) BEFORE Serial No. "97K" or 21 + 3 PSI (144.79 + 51.32 kPa) AFTER Serial No. "97K" is reached. The time between cycles is dependent on altitude, flow rate and internal environmental factors.

E Q U

E N C

E O

F O

E R

I O N

On the 5LX/5LXO2/5LXO2T/6LXO2/6LXO2T, a P.E. or Pressure Equalization valve opens just prior to the shift of the 4-way valve. This allows highly concentrated oxygen to enter the just exhausted bed from the top. This additional pressure allows the bed to start its cycle at a higher pressure. The P.E. valve will close just after the shift of the 4-way valve.

INST ALLATION / SEQUENCE OF OPERA TION

INSTALLATION / SEQUENCE OF OPERATION, CONTINUED

If main power is lost, the Battery FreeTM Power Loss Alarm will sound a short "beep", with a long pause,

intermittently. All units are equipped with a diagnostic alarm system that signals if the pneumatic pressure

or electrical systems malfunction. The Troubleshooting Guide explains the alarm system signals and

reasons in detail for your convenience.

T A

SENSO2 OXGYEN SENSOR TECHNOLOGY CERAMIC ZIRCONIA SENSOR

L L

Technical Description

The oxygen being produced by the concentrator flows out of the product tank and into the flowmeter.

In-line between these components is a tee fitting that directs a small flow of oxygen through a precision

orifice to the oxygen sensor mounted on a printed circuit board.

As the oxygen enters the sensor, it passes through a screen and contacts the sensing disk.

Electric current flowing through a metal film resistor heats the disk in excess of 300 contact the electrode of the disk and pick-up extra electrons to become oxygen ions. These oxygen ions are attracted to the electrode on the bottom of the zirconia disk. Because of the crystal structure of the zirconia, only oxygen ions can pass through. When the oxygen ions reach the bottom electrode, the extra electrons are released from the oxygen ions and oxygen molecules return to the air. The number of electrons is directly related to the oxygen concentration. The electrons travel to the PC board where they

are "counted" and the oxygen concentration "reading" is calculated.

A microprocessor on the P.C. board contains software that interprets the signal being received from the

sensor. It compares the signal to clinically acceptable limits that have been selected with the indicator

E N

switch mounted on the PC board. Signals outside of the clinically acceptable limits generate responses in

the form of lighted LEDs, audible indicators, and/or system shut-down.

Operating Sequence

Once the power switch has been turned ON, the SensO

begin producing clinically acceptable oxygen before activating. No LEDs will illuminate for at least 5

minutes.

E R

After 5 minutes, if the oxygen purity exceeds 85%

A T

If the oxygen level is not above 85%

wait for a maximum of 30 minutes from start-up to reach 85% + 2% before activating an alarm. Environ-

mental factors such as low voltage, high altitude, or age of the machine will affect the time required to

+ 2% after the first 5 minutes, LEDs will remain off. The system will

reach 85% + 2%.

circuit will wait 5 minutes for the concentrator to

+ 2% the GREEN LED will illuminate.

C. Oxygen molecules

If the oxygen level is not above 85%

+ 2% within the first 30 minutes, the oxygen concentration alarm sequence will activate, depending upon the position of the indicator switch. All units are preset at the factory at 73% + 3%.

When oxygen concentration is above 85%

+ 2%, the sensor measures oxygen purity every 10 minutes.

If a reading falls below 85% + 2% and the alarm indicator is in the 73% mode or no switch is present, the oxygen sensor measures purity continuously and a yellow LED will illuminate. If the oxygen purity falls below 73% + 3% the RED LED/Alarm/Shut-Down mode will activate. If the selector switch is present and it is set at 85%, the RED LED/Alarm/Shut-Down mode will activate if the oxygen purity falls below 85% + 2%.

PNEUMA TIC DIAGRAM

BACTERIA

FILTER

FLOWMETER

TEST POINT 1

(OXYGEN CONCENTRAT OR

OUTLET)

FLOW

RESTRICTOR

OPTIONAL

OXYGEN SENSOR

PNEUMATIC DIAGRAM

INVACARE 3 & 5 OXYGEN CONCENTRATORS

MODELS IRC3LX, IRC5LX, IRC5LXO2

RESTRICTOR

ASSEMBLY

IRC3LX &

IRC5LX

ONL Y

PRESSURE

REGULAT OR

(BETWEEN PRODUCT TANK AND

CHECK VALVES

PRODUCT TANK

P.C.BOARD

TEST POINT 2

CHECK VALVE)

RESTRICTOR

is EXTERNAL on

IRC3LX ONLY.

It is INTERNAL to

P.E. VALVE for

IRC5LX &

IRC5LXO2

CROSSOVER

ASSEMBLY

P N E U

A T

C D

R A

AIR INLET

COMPRESSOR

INLET FILTER

RESONA TO R

CABINET

(GROSS P ARTICLE)

FILTER

SOLENOID PILOT

VALVE

RELIEF

VALVE

SIEVE

BED

5LX/5LXO2/

5LXO2T/

6LXO2/

6LXO2T ONLY

P.E. VALVE

SIEVE

BED

4-WAY VAL VE

EXHAUST MUFFLER

AIR

COMPRESSOR

HEAT

EXCHANGER

LEGEND

and =

ELECTRICAL CONNECTIONS

TROUBLESHOOTING GUIDE

R O U B

E S H O O

N G

SYMPTOM: PROBABLE CAUSE: SOLUTION:

NORMAL OPERA TION: Internal Status Indicators:

RED: Off GREEN: Off

Unit plugged in, power switch on. 3 "beeps" on start up.

POWER LOSS: Internal Status Indicators: RED: Off GREEN: Off

Unit unplugged, power switch on, alarm off.

POWER LOSS: Internal Status Indicators: RED: Off GREEN: Off

Unit plugged in, power switch on, alarm off. "Battery Free drained.

TM"

circuit

TROUBLESHOOTING GUIDE

No problems. System O.K.

No problems.

1. No Power at outlet.

2. Power Cord. a. Frayed. b. Broken or damaged spade.

c. Spade connector from Power

Cord loose or disconnected (inside back of unit).

"Battery Free in cord and turn power switch ON to recharge.

1. Check electrical outlet with a tablelamp or voltmeter set on 150-200 VAC scale. If outlet isn't working, check protective device in home's electrical panel or consult an electrician. Also ensure that unit is properly plugged in. DO NOT use extension cords. Move to another outlet or circuit.

2a.Replace cord. 2b.Replace power cord connectors

on plug.

2c.Reattach connector.

" Circuit drained. Plug

3. On/Off switch. a. Disconnected wire.

b. Faulty switch.

3a.Check all electrical connections

to the On/Off switch for any disconnected wires.

3b.If the concentrator does not come

on at all and wiring is intact, color code and remove wires one at a time and clean the On/Off switch with contact cleaner while turning the switch on and off. Reinstall switch and turn power on. If switch still doesn't work, replace switch. Transfer wires from old switch to new switch one at a time to the matching contact.

NOTE: REFER TO THE REPAIR/REPLACEMENT GUIDE IN THIS MANUAL FOR PROPER

REPLACEMENT OR ADJUSTMENT PROCEDURES

TROUBLESHOOTING GUIDE

SYMPTOM: PROBABLE CAUSE: SOLUTION:

POWER LOSS, Continued:

INTERNAL POWER LOSS SENSO2: Internal Status Indicators: RED: Off GREEN: Off

Alarm may or may not be on.

Control Panel Indicators: RED: Off YELLOW: Off GREEN: Off

Fan operates, power light on, compressor not operating.

TROUBLESHOOTING GUIDE

4. Circuit breaker. Tripped.

5. P.C. Board. a. Damaged. b. Loose or damaged connector.

1. Transformer Assembly. a. Faulty. b. Connector loose or discon-

nected.

c. Faulty wiring.

2. P.C. Board. Faulty.

4. Reset breaker.

NOTE: Breaker may trip to safeguard concentrator during a power surge. If breaker trips immediately, there is a probable short in the unit. Check for pinched or charred wires. If the breaker does not trip, run unit for approximately 2 hours. If breaker trips again, there is an internal problem. Contact INVACARE TECHNICAL SERVICE.

5a.Replace (PROCEDURE 1 1). 5b.Repair or replace connector.

1a.Replace (PROCEDURE 12). 1b.Reattach connector.

1c.Replace Transformer Assembly

(PROCEDURE 12).

2. Replace P.C. Board (PROCEDURE 11). For 5LX or 6LX -

Unit may require retiming after P.C. Board replacement (PRO-

CEDURE 18).

T R

U B L E S

H O O

N G

HIGH PRESSURE: Internal Status Indicators:

RED: On GREEN: Off

(

LX Control Board

RED: One (1) Flash GREEN : T wo (2) Flashes

(Integrated Sensor Board) (LX SMT Board)

Control Panel Indicators: RED: On YELLOW: Off GREEN: Off

Unit plugged in, power switch on, continuous alarm. Compressor shut down.

)

1. P.C. Board. a. Malfunction.

b. Disconnected Wire.

c. Shifting Valve at Pressures

greater than 25 p.s.i.

2. 4-way Valve a. Not Shifting.

1a.Set flow to max l/min. for concen-

trator. Check voltage across Pilot Valve 1 on 200 volt scale. If meter reads 0 volts when unit is turned on, replace P.C. Board (PROCEDURE 1 1).

1b.Check spade connectors on pilot

valves 1 and 2 and connectors on P.C. Board.

1c.Replace P.C. Board (PROCE-

DURE 11). For 5LX or 6LX Unit may require retiming after P.C. Board replacement (PRO-

CEDURE 18).

2a.If voltage rises to approximately

24 volts D.C. when unit shuts down, P.C. Board is functioning properly. Replace 4-way Valve (PROCEDURE 16).

NOTE: REFER TO THE REPAIR/REPLACEMENT GUIDE IN THIS MANUAL FOR PROPER

REPLACEMENT OR ADJUSTMENT PROCEDURES

TROUBLESHOOTING GUIDE

R O U B

E S H O O

N G

SYMPTOM: PROBABLE CAUSE: SOLUTION:

HIGH PRESSURE, Continued

LOW PRESSURE: Internal Status Indicators: RED: On GREEN: On

LX Control Board

(

RED: One (1) Flash GREEN : One (1) Flash

(Integrated Sensor Board) (LX SMT Board)

Unit plugged in, power switch on, continuous audible alarm. Compressor shut down (Failure to cycle due to low pressure).

)

TROUBLESHOOTING GUIDE

b. Bad Coil.

3. Sieve Beds. Contaminated.

1. Inlet Filter Dirty or Plugged.

2. Compressor. a. Leaks at fittings or tubing. b. Leaking or defective relief

valve.

c. Insufficient voltage at outlet.

d. Worn Cup Seals or Gaskets.

3. Heat Exchanger a. Leak at tubing or body cham-

ber.

b. Inspect tubing and heat

exchanger.

2b.Replace 4-way Valve (PROCE-

DURE 16).

3. Replace Sieve Beds (PROCEDURE 4).

1. Replace Inlet Filter (PROCEDURE 2).

2a.Replace or repair. 2b.Repair leak or replace.

2c.DO NOT use extension cords.

Use another outlet.

2d.Rebuild Top End of Compressor

(PROCEDURE 2).

3a.Replace or retighten.

3b.Replace or retighten tubing. Re-

place Heat Exchanger (PROCE-

DURE 8).

4. Replace (PROCEDURE 6).4. Regulator cracked or leaking.

5. P.E. Valve leaking. 5. Replace P.E. valve. Check volt age at P.E. valve connector on 24 volt D.C. scale. The P.E. valve activates or energizes approximately 1 second prior to the activation of the 4-way Valve with approximately 24 volts. If voltage is in excess of 24 volts consistently, replace the P.C. Board. If the P.C. Board voltage acts normally, replace the P.E.valve (PROCEDURE 3).

NOTE: Check for leaks starting at the compressor output through all the pneumatic connections. Major leaks will cause system pressures to remain below adequate shift (exhaust) pressures and will cause compressor shut down.

NOTE: REFER TO THE REPAIR/REPLACEMENT GUIDE IN THIS MANUAL FOR PROPER

REPLACEMENT OR ADJUSTMENT PROCEDURES

TROUBLESHOOTING GUIDE

SYMPTOM: PROBABLE CAUSE: SOLUTION:

LOW CONCENTRA TION: NOTE: Check for O2 purity using a calibrated Oxygen Analyzer at Test Point 1 (OXYGEN OUTLET) of the concentrator.

Internal Status Indicators: RED: On GREEN: Off

(

LX Control Board

RED: Two (2) Flash GREEN : One (1) Flash 73% Shutdown

)

(Integrated Sensor Board)

RED: Two (2) Flash GREEN : T wo (2) Flashes 85% Shutdown

(Integrated Sensor Board)

Control Panel Indicators: SensO2 ONL Y: RED: On YELLOW: Off GREEN: Off

For SensO2 units, the Red indicator will signal extremely low purity and will be accompanied by a continuous audible alarm and a system shutdown. Repairs are required.

Internal Status Indicators: RED: Off GREEN: Off

(

LX Control or Integrated Sensor

Board)

Control Panel Indicators: SensO2 ONL Y: RED: Off YELLOW: On GREEN: Off

A Yellow indicator signals low purity, but within specification for the user. Repairs are required.

TROUBLESHOOTING GUIDE

1. Cabinet Filters Dirty.

2. Inlet Filter Dirty.

3. Compressor.

a. Defective.

b. Faulty Capacitor.

c. Bad Motor Windings.

d. Worn Seals.

e. Bad Bearings.

f. Leak at fittings or tubing. g. Leaky or Defective Relief

Valve.

h. Insufficient voltage (outlet).

4. Heat Exchanger. a. Leak at tubing or body cham-

ber.

b. Inspect tubing and Heat

Exchanger.

5. Regulator Cracked or Leaking.

6. Exhaust Muffler dirty or plugged.

7. Fan a. Not Operating. Unit overheat-

ing.

b. Faulty Fan.

8. Sieve Beds defective

9. Tubing kinked or blocked.

10.P.C. Board a. Shifts at wrong pressures.

b. Pressure transducer tubing

leaks.

1. Clean or Replace (PROCEDURE

2).

2. Replace (PROCEDURE 2).

3a.Replace Compressor (PROCE-

DURE 7).

3b.Replace Capacitor (PROCE-

DURE 7).

3c.Replace Compressor (PROCE-

DURE 7).

3d.Rebuild Top End of Compres-

sor (PROCEDURE 2).

3e.Replace Compressor (PROCE-

DURE 7).

3f. Replace Fittings or Tubing. 3g.Replace Relief Valve.

3h.DO NOT use extension cords.

4a.Replace or Retighten.

4b.Replace or retighten tubing.

Replace Heat Exchanger (PRO-

CEDURE 8).

5. Replace (PROCEDURE 6).

6. Replace (PROCEDURE 2).

7a.Leads to fan Disconnected.

Reconnect (PROCEDURE 10).

7b.Replace (PROCEDURE 10).

8. Replace (PROCEDURE 4).

9. Repair or replace.

10a.Check pressure at product tank.

Pressure should rise to 20 p.s.i. at shift point. If not, replace P.C. Board (PROCEDURE 21).

10b.Inspect tubing at transducer and

at product tank. Replace tubing

ONLY if damage is evident. (PROCEDURE 9).

T R O U B

S H O O

I N G

NOTE: REFER TO THE REPAIR/REPLACEMENT GUIDE IN THIS MANUAL FOR PROPER

REPLACEMENT OR ADJUSTMENT PROCEDURES

TROUBLESHOOTING GUIDE

R O U B

E S H O O

N G

TROUBLESHOOTING GUIDE

SYMPTOM: PROBABLE CAUSE: SOLUTION:

LOW CONCENTRA TION, Continued:

11.Flowmeter. a. Flowmeter opened beyond

maximum flow rate. b. Cracked or broken Fitting. c. Input tubing leaking or loose.

12.Timing.

13. P.E. Valve. a.Bad Coil.

b.Restrictor Blockage.

14. Inspect P.C. Board Restrictor tubing for kinks or tears.

11a.Return flow to maximum setting.

11b.Replace fitting. 11c.Repair or replace.

12. To accommodate for varying tolerances when replacing components, an adjustable timer is used to control the shifting of the Invacare 5 Pressure Equalization (P.E.) Valve (PROCE-

DURE 18).

13a.Replace P.E. Valve (PROCE-

DURE 3).

13b.Replace P.E. Valve (PROCE-

DURE 3).

14. Replace P.C. Board. Unit may need retiming after board replacement (PROCEDURE

11).

FLUCTUA TING FLOW :

UNIT EXCESSIVEL Y LOUD:

1. Regulator/Flowmeter. a. Incorrectly set regulator.

b. Flowmeter malfunction.

2. Bacteria Filter

a. Dirty or Plugged

1. Pneumatic Exhaust. a. Muffler cracked, damaged or

missing.

b. Muffler tubing disconnected or

damaged.

2. Intake Resonator. a. Damaged or missing. b. Tubing disconnected or dam-

aged.

3. Inlet Filter missing.

4. Compressor.

1a.Check pressure at oxygen outlet.

Adjust Regulator (PROCEDURE

6).

1b.If flow is still unstable, check for

leaks starting at the compressor outlet fitting through all pneumatic connections. If no leaks are found and flow is still fluctuating, replace the regulator (PROCEDURE 6). If pressure at test point is within spec (5 p.s.i. + 0.2 max. [34.4 kPa + 6.89]), replace flowmeter

(PROCEDURE 14).

2a. If low flow conditions persists, replace bacteria filter.

1a.Replace. (PROCEDURE 2).

1b.Reconnect or replace tubing.

2a.Install new resonator. 2b.Reconnect tubing or replace.

3. Replace inlet filter.

4. Replace Compressor. Internal

damage (PROCEDURE 7).

NOTE: REFER TO THE REPAIR/REPLACEMENT GUIDE IN THIS MANUAL FOR PROPER

REPLACEMENT OR ADJUSTMENT PROCEDURES

TROUBLESHOOTING GUIDE

SYMPTOM: PROBABLE CAUSE: SOLUTION:

UNIT OVERHEA TS:

TROUBLESHOOTING GUIDE

1. Base Exhaust Vent Plugged or

restricted.

2. Cabinet Filters Dirty or blocked.

3. Fan.

a. Leads to fan disconnected. b. Defective Fan. c. Fan installed upside down.

4. Heat Exchanger.

a. Fins dirty or plugged.

b. Fins damaged.

5. Compressor. a. Defective.

b. Faulty capacitor.

c. Bad motor windings.

d. Worn seals.

e. Bad bearings.

1. Place unit at least 3-inches from any wall. DO NOT place unit on pile or shag carpeting that may restrict air flow.

2. Clean or replace (PROCEDURE

2).

3a.Reconnect leads. 3b.Replace fan (PROCEDURE 10). 3c.Install fan with air flow arrow

pointing down (PROCEDURE

10).

4a.Clean heat exchanger (PRO-

CEDURE 2).

4b.Replace heat exchanger (PRO-

CEDURE 8).

5a.Replace compressor (PROCE-

DURE 7).

5b.Replace capacitor (PROCE-

DURE 7).

5c.Replace compressor (PROCE-

DURE 7).

5d.Replace compressor (PROCE-

DURE 7).

5e.Replace compressor (PROCE-

DURE 7).

T R

U B L E S

H O O

N G

6. Line Voltage excessive (surge). 6. Have line voltage inspected by

certified electrician. A voltage regulator may be required and is obtainable from your local electric company.

OXYGEN PURITY: GOOD Internal Status Indicators:

RED: Off GREEN: Off

Control Panel Indicators: RED: Off YELLOW: Off GREEN: Off

Purity Switch setting at 73% or 85%: After 30 minutes of run time, unit operates normally, oxygen purity within normal range. Green or Yellow panel indicator should illuminate.

1. P.C. Board defective. 1. Replace P.C. Board (PROCE- DURE 11). Unit may need retiming after P.B. Board replacement (PROCEDURE 18).

NOTE: REFER TO THE REPAIR/REPLACEMENT GUIDE IN THIS MANUAL FOR PROPER

REPLACEMENT OR ADJUSTMENT PROCEDURES

TROUBLESHOOTING GUIDE

T R O U B

S H O O

I N G

UNIT NOT OPERA TING ALARM: OFF Internal Status Indicators: RED: Off GREEN: Off CONTROL P ANEL INDICA TORS: RED: Off YELLOW: Off GREEN: Off

Purity Switch setting at 73% or 85%.

UNIT NOT OPERA TING, Internal Status Indicators: RED: Off

GREEN: Off

Control Panel Indicators: RED: Off

YELLOW: Off

GREEN: Off

Power Switch ON. Continuous audible alarm.

TROUBLESHOOTING GUIDE

SYMPTOM: PROBABLE CAUSE: SOLUTION:

1. Purity Switch. Defective.

2. Horn. Disconnected.

1. Transformer Assembly. a. Molex connector disconnected

from P.C. Board.

b. Faulty transformer assembly.

1. Replace P.C. Board. (PROCE- DURE 11). Unit may need retiming after board replacement.

(PROCEDURE 18).

2. Reattach horn connector to harness.

1a.Reattach connector.

1b.Replace transformer assembly

(PROCEDURE 12).

UNIT NOT OPERA TING, Internal Status Indicators: RED: Three (3) Flashes GREEN: One (1) Flash

(Integrated Circuit Board)

Control Panel Indicators: RED: Off

YELLOW: Flashing

GREEN: On

1. Internal repairs required.

1. Replace SensO2 circuit board

(PROCEDURE 11).

NOTE: REFER TO THE REPAIR/REPLACEMENT GUIDE IN THIS MANUAL FOR PROPER

REPLACEMENT OR ADJUSTMENT PROCEDURES

CABINET PROCEDURE 1

REPAIR / REPLACEMENT GUIDE

INV ACARE 3LX, INV ACARE - 5LX/5LXO2/5LXO2T AND INV ACARE - 6LXO2/6LXO2T

PROCEDURE 1 - REMOVING CABINET (FIGURE 1)

CAUTION TO PREVENT ELECTRICAL SHOCK, ALWAYS DISCONNECT CONCENTRATOR FROM ELECTRICAL OUTLET BEFORE SERVICING.

1. Unplug unit.

2. Remove the eight (8) mounting screws that secure cabinet assembly to the base assembly.

3. Lift the cabinet straight up.

NOTE: When required, vacuum inside of the cabinet and exposed foam insulation.

4. To re-install cabinet, reverse STEPS 2-3.

Cabinet Assembly

C A B

E T

Mounting Screws (8 each)

FIGURE 1 - REMOVING CABINET

Base Assembly

PROCEDURE 2 PREVENTIVE MAINTENANCE PROCEDURE 2 - PREVENTIVE MAINTENANCE

P R E

TO PREVENT ELECTRICAL SHOCK, ALWAYS

DISCONNECT CONCENTRATOR FROM ELECTRICAL OUTLET BEFORE SERVICING.

NOTE: The Invacare Concentrators are specifi-

cally designed to minimize routine preventive

maintenance at intervals of once per year. In

places with high dust or soot levels, mainte-

nance may need to be performed more often.

The following must be performed at a minimum

of one (1) year in service to assure years of ad-

ditional reliability (Refer to TROUBLESHOOT-

ING GUIDE for plugged filter symptoms). Only

authorized or factory-trained personnel should perform preventive maintenance on the concentrator. Power should be disconnected before beginning preventive maintenance on the Invacare concentrator.

Cabinet Filters (FIGURE 1)

1. Clean or replace gross particle (cabinet) filters

on both side of the cabinet.

I L T E R S

CAUTION

Inlet Filter

Sound Box

FIGURE 2 - INLET FILTER

Bacteria Filter (FIGURE 3)

1. Unplug unit.

2. Remove cabinet (Refer to PROCEDURE 1 -

REMOVING CABINET).

NOTE: The bacteria filter is accessible without removing the control panel but, if it becomes necessary to loosen the control panel to access the bacteria filter, refer to PROCEDURE 9 REMOVING CONTROL PANEL.

3. Remove FRONT of bacteria filter from the tygon

tubing extending to the top fitting of the flowmeter.

4. Remove REAR of bacteria filter from the tygon

tubing extending to back of in-line check valve.

5. Install NEW bacteria filter by reversing STEPS

3-4.

FIGURE 1 - CABINET FILTERS

Inlet Filter (FIGURE 2) NOTE: Perform this procedure as needed

depending upon the environment the concentrator is used in.

1. Unplug unit.

2. Remove cabinet (Refer to PROCEDURE 1 -

REMOVING CABINET).

3. Unscrew the inlet filter located on the top left of

the sound box (counterclockwise).

4. Discard existing inlet filter and replace with a

NEW inlet filter.

5. Reinstall cabinet (Refer to PROCEDURE 1 -

REMOVING CABINET).

6. Reinstall cabinet (Refer to PROCEDURE 1 REMOVING CABINET).

In-line Check Valve

(SHOWN for identification.)

Tygon Tubing

(Remove Bacteria

Filter.)

Tygon Tubing

To Top Fitting of Flowmeter

(Remove Bacteria Filter.)

Bacteria Filter

FIGURE 3 - BACTERIA FIL TER

+ 50 hidden pages