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INVACARE PerfectO2 – TROUBLESHOOTING

invacare perfecto2 troubleshooting
  • The Invacare Perfecto2 concentrator is used by patients with respiratory disorders who require supplemental oxygen. The device is not intended to sustain or support life.
  • The oxygen concentration level of the output gas ranges from 87% to 95.6%. The oxygen is delivered to the patient through the use of a nasal cannula.
  • The Invacare Perfecto2 concentrator uses a molecular sieve and pressure swing adsorption methodology to produce the oxygen gas output. Ambient air enters the device, is filtered and then compressed. This compressed air is then directed toward one of two nitrogen adsorbing sieve beds. Concentrated oxygen exits the opposite end of the active sieve bed and is directed into an oxygen reservoir where it is delivered to the patient.
  • The Invacare Perfecto2 concentrator is capable of operation by the patient in a home environment or in an institutional environment. Device operates at a nominal 120 VAC/60 Hertz supply.

The Invacare PerfectO2 is an oxygen concentrator used to provide medical-grade oxygen therapy to patients. If you are experiencing issues with the device, here are some troubleshooting you can take:

SYMPTOMPROBABLE CAUSESOLUTION
Normal Operation:
Internal Status Indicators:
RED: Off
GREEN: Off
Unit plugged in, power switch
on. Single beep on start up.
No Problems.System Okay.
Power loss:
Internal Status Indicators:
RED: Off
GREEN: Off
Unit unplugged, power
switch on, alarm off.
No Problems.Battery Free Circuit drained.
Plug in cord and turn power
switch ON (I) to recharge.
Power loss:
Internal Status Indicators:
RED: Off
GREEN: Off
Unit plugged in, power switch
, alarm off, battery Free
circuit drained.
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).

3. On/Off (I/O) switch.
a. Disconnected wire.
b. Faulty switch.

4. Circuit breaker tripped.
1. No power at outlet:
Check electrical outlet with a table lamp
or voltmeter set on 50-200 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.

2. Power cord:
a. Reattach cord.
b. Replace power cord connectors on
plug.
c. Reattach connector.

3. On/Off (I/ ) switch.
a. Check all electrical connections
to the ON/OFF (I/O) switch for any
disconnected wires.
b. If the concentrator does not come
on at all and wiring is intact, color
code and remove wires one at a time.
Remove and replace with new one.
Transfer wires from old switch to
new switch one at a time to
the matching contact.

4. Circuit breaker tripped:
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 two hours. The circuit breaker should be less than 10 ohms.
If breaker trips again, there is
an internal problem.
Contact Invacare Technical Service.
Power Loss:
(Continued)
Internal Status Indicators:
RED: Off
GREEN: Off
Unit plugged in, power
switch, alarm off. Battery
Free circuit drained
P.C. board.
a. P.C. board damaged.
b. Loose or damaged connector.
a. Replace P.C. Board.
b. Repair or replace connector.
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, Compressor
not operating
1. Transformer assembly.
a. Faulty.
b. Connector loose or
disconnected.
c. Faulty wiring.

2. P.C. board faulty
1. Transformer assembly:
a. Replacing the transformer .
b. Reattach connector.
c. Replace transformer assembly

2. P.C. board faulty:
2. Replace P.C. board. Unit requires
retiming after P.C. board replacement.
High Pressure:
Internal Status Indicators:
RED: One Flash
GREEN: Two Flashes
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. for Perfecto2.

2. 4-way Valve:
a. Not shifting.
b. Bad coil.
c. Coil resistance

3. Compressor inlet filter dirty or plugged.
1. P.C. board:
a. Set flow to max L/min. for
concentrator. Check voltage across
Pilot Valve on 200 volt scale. If
meter reads 0 volts when unit is
turned on, replace P.C. board
b. Check spade connectors on pilot
valves 1 or 2 and connectors on P.C.
board.
c. Replace P.C. board. Unit requires
retiming after P.C. board
replacement.

2. 4-way Valve:
a. Check voltage. If voltage rises to
approximately 24 volts D.C. when
unit shuts down, P.C. board is
functioning properly. Replace the
valve if shorted or open. Refer to
Replacing 4-Way Valve and/or
Manifold Assembly.
b. Replace 4-way valve. Refer to
Replacing 4-Way Valve and/or
Manifold Assembly.
c. Coil should read 175 ohm ± 20

3. Compressor inlet filter dirty or plugged:
Replace compressor inlet filter. Refer to
Replacing the Compressor Inlet HEPA
Filter.
LOW PRESSURE:
Internal Status Indicators:
RED: One Flash
GREEN: One Flash
Or
RED: One Flash
GREEN: Three Flashes
Control Panel Indicators:
RED: On
YELLOW: Off
GREEN: Off
Unit plugged in, power switch
on, continuous audible alarm.
Compressor shut down
(Failure to cycle due to low
pressure).
1. Compressor:
a. Leaks at fittings or tubing
b. Leaking or defective relief valve.
c. Insufficient voltage at outlet.
d. Worn cup seals or gaskets.

2. Heat exchanger:

a. Leak at tubing or body chamber.
b. Inspect tubing and heat
exchanger.

3. Regulator cracked or leaking.

4. P.E. valve leaking.
1. Compressor:
a. Replace or repair.
b. Repair leak or replace.
c. DO NOT use extension cords. Use
another outlet.
d. Rebuild top end of compressor. Refer
to Rebuilding the Thomas Model
2660 Compressor.

2. Heat exchanger:
a. Replace or retighten.
b. Replace or retighten tubing. Replace
heat exchanger. Refer to Replacing
Heat Exchanger Assembly.

3. Regulator cracked or leaking:
Replace Regulator

4. P.E. valve leaking:
Replace P.E. Valve. Check voltage
at P.E. valve connector on 24 volt D.C. scale.
The P.E. Valve activates or energizes
approximately one 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.
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 shutdown.
Defective Parts:
Internal Status Indicators:
RED: One Flash GREEN:
Five Flashes
Or
RED: Two Flashes
GREEN: Three Flashes
Control Panel Indicators:
RED: On
YELLOW: Off
GREEN: Off
Unit plugged in, power
switch on, continuous audible alarm.
Compressor shut down.
1. Defective main valve coil.

2. Connector loose.

3. Defective P.E. valve coil.
(Resistance 80 ohm’s ± 10.)

4. Defective P.E. valve.

5. Connector loose.

6. Defective P.C. board.
1. Defective main valve coil.
a.
Replace main valve.
b. Replace main valve coil.

2. Connector loose.

Reattach connector.

3. Defective P.E. valve coil.

Replace P.E. coil if shorted or open on resistance check.

4. Defective P.E. valve.

Replace P.E. valve.

5. Connector loose.

Reattach connector.

6. Defective P.C. board.

Replace P.C. board.
Unit not operating: Alarm:
On or Off
Internal Status Indicators:
RED: Two Flashes
GREEN: Four Flashes Or
RED: Two Flashes GREEN:
Five Flashes
P.C. board Failure.Replace P.C. board
Low Concentration: NOTE:
Check for O2
purity using a
calibrated Oxygen Analyzer
at Test Point 1 (oxygen
outlet) of the concentrator.

Internal Status Indicators:
RED: Two Flashes
GREEN: One Flash73%
Shutdown Control Panel
Indicators: SensO2
ONLY:
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.
1. Cabinet filters dirty.

2. Compressor 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 chamber.
b. Inspect tubing and heat
exchanger.

5. Regulator cracked or leaking.

6. Exhaust muffler dirty or plugged.

7. Fan:
a. Not operating. Unit overheating.
b. Faulty fan.

8. Sieve beds defective.

9. Tubing kinked or blocked.
1. Cabinet filters dirty.
Clean or replace. Replacing the
Outlet HEPA Filter, and
Replacing the Compressor Inlet HEPA Filter.

2. Compressor inlet filter dirty.
Replace inlet filter. Refer to Replacing the
Compressor Inlet HEPA Filter.

3. Compressor:
a. Replace compressor.
b. Replace capacitor.
c. Replace compressor.
d. Rebuild top end of compressor.
e. Replace compressor.
f. Replace fittings or tubing.
g. Replace relief valve.
h. DO NOT use extension cords.

4. Heat exchanger:
a. Replace or retighten.
b. Replace or retighten tubing.
Replace heat exchanger.

5. Regulator cracked or leaking.
Replacing Regulator.

6. Exhaust muffler dirty or plugged.
Replacing the Muffler Assembly.

7. Fan:
a. Leads to fan disconnected.
Reconnect.
b. Replacing Cooling Fan.

8. Sieve beds defective.
Replace Sieve Bed.

9. Tubing kinked or blocked.
Repair or replace.
Low Concentration
(Continued)
1. P.C. board:
a. Shifts at wrong pressures.

2. Flowmeter:
a. Flowmeter opened beyond
maximum flow rate.
b. Cracked or broken fitting.
c. Input tubing leaking or loose.

3. Timing.

4. P.E. valve:
a. Bad coil.
b. Restrictor blockage.

5. Inspect P.C. board restrictor tubing for kinks or tears.
1. P.C. board:
Check pressure at product tank. Pressure should rise to
21 p.s.i. at shift point.
If not, replace P.C. Board.

2. Flowmeter:
a. Return flow to maximum setting.
b. Replace fitting.
c. Repair or replace.

3. Timing.
To accommodate for varying
tolerances when replacing
components, an adjustable
timer is used to control the
shifting of the Pressure
Equalization (P.E.) valve.

4. P.E. valve:
a. Replace P.E. valve.
b. Replace P.E. valve.

5. Inspect P.C. board restrictor tubing for kinks or tears.
Replace P.C. board. Unit may need retiming after board replacement.
Fluctuating Flow:1. Regulator/Flowmeter:
a. Incorrectly set regulator.
b. Flowmeter malfunction.

2. Outlet HEPA filter:
a. Dirty or plugged

1. Regulator/Flowmeter:

a. Check pressure at oxygen outlet.
Adjust regulator.
b. 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. If pressure at test point
is within spec (5 p.s.i. ± 0.5 max.
[34.4 kPa ± 6.89]), replace
flowmeter.

2. Outlet HEPA filter:
a. If low flow conditions persist,
replace outlet HEPA filter.
Unit Excessively Loud:1. Pneumatic exhaust:
a. Muffler cracked, damaged or
missing.
b. Muffler tubing disconnected or
damaged.

2. Compressor inlet filter missing and/or orange sticker removed.

3. Compressor removed.

4. Incorrect style of inlet filter
(aftermarket).
1. Pneumatic exhaust:
a. Replacing the
Muffler Assembly.
b. Reconnect or replace tubing.

2. Compressor inlet filter missing and/or orange sticker removed.
a. Replace compressor inlet filter.

3. Compressor removed.
a. Replace Compressor.

4. Incorrect style of inlet filter
(aftermarket).

a. Replace with factory OEM sound
reduced style inlet HEPA filter.
Unit Overheats: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. Dirty or plugged.
b. Damaged.

5. Compressor:
a. Defective.
b. Faulty capacitor.
c. Bad motor windings.
d. Worn seals.
e. Bad bearings.

6. Line voltage excessive (surge).
1. Base exhaust vent plugged or
restricted.

Place unit at least 12 inches from any wall. DO NOT place unit on pile or shag carpeting that may restrict air flow.

2. Cabinet filters dirty or blocked.
Clean or replace.

3. Fan:
a. Reconnect leads.
b. Replace fan.
c. Install fan with air flow arrow pointing
down.

4. Heat exchanger:
a. Clean heat exchanger.
b. Replace heat exchanger.

5. Compressor:
a. Replace compressor.
b. Replace capacitor.
c. Replace compressor.
d. Replace compressor.
e. Replace compressor.

6. Line voltage excessive (surge).
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:
Control Panel Indicators:
RED: Off
YELLOW: On
GREEN: On
After 30 minutes of
run time, unit operates
normally, oxygen purity
within normal range.
GREEN or YELLOW panel
indicator should illuminate.
P.C. board defective.Replace P.C. board. Unit may need
retiming after P.C. board replacement.
Unit Not Operating,
Internal Status Indicators:
RED: Off
GREEN: Off
Control Panel Indicators:
RED: Off
YELLOW: Off
GREEN: Off
Power Switch ON.
Continuous audible alarm.
Transformer assembly:
a. Assembly connector
disconnected.
b. Faulty transformer assembly
a. Reattach connector.
b. Replace transformer assembly.
Unit Operating,
Internal Status Indicators:
RED: Three Flashes
GREEN: One Flash
Control Panel Indicators:
RED: Off
YELLOW: Flashing
GREEN: On
Internal repairs required.Replace SensO2 circuit board.
Potential Obstruction Alert
does not activate on flows
less than 0.5 L/min.
1. System leak.

2. Defective check valves.
1. System leak.
Repair leak in product tank, regulator,
tubing, fittings, or flow meter.

2. Defective check valves.
Replace check valves.

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