Invacare IRC5PAW User manual

Service Manual
DEALER: Keep this manual. The procedures in this manual
MUST be performed by a qualified technician.
For more information regarding
Invacare products, parts, and services,
please visit www.invacare.com
Perfecto2™
Oxygen Concentrator
(HomeFill®II Compatible)
123456789642436
1234567896242436
0120

Perfecto2™ 2Part No 1154245
 87
DO NOT OPERATE THIS EQUIPMENT WITHOUT FIRST READING AND
UNDERSTANDING THIS MANUAL. IF YOU ARE UNABLE TO UNDERSTAND
THE WARNINGS, CAUTIONS, AND INSTRUCTIONS, CONTACT INVACARE
TECHNICAL SERVICES BEFORE ATTEMPTING TO USE THIS EQUIPMENT -
OTHERWISE SERIOUS INJURY OR PROPERTY DAMAGE MAY RESULT.
 87
Invacare products are specifically designed and manufactured for use in conjunction
with Invacare accessories. Accessories designed by other manufacturers have not
been tested by Invacare and are not recommended for use with Invacare products.
89
1
68691777
The Platinum concentrator and the Perfecto2concentrator share many similar
components. However, there are some components that are NOT cross compatible
and they are specific to each model.
Parts that can be used for Perfecto2repairs are listed in the Perfecto2parts catalog,
form number 08_076. Please reference this catalog before replacing any parts. Use
of incorrect parts could result in injury or property damage.

TABLE OF CONTENTS
Part No 1154245 3Perfecto2™
669
9766
!86 "
7968#!968186 $
976%&7186!8#6 %'
Important Safeguards...............................................................................................................................10
Radio Frequency Interference ...............................................................................................................10
976&77()!966876 %
Verification of Battery Free Power Loss Alarm ................................................................................12
Sequence of Operation ...........................................................................................................................12
SensO2Oxygen Sensor Technology - Ceramic Zirconia Sensor .................................................13
Technical Description .........................................................................................................................13
Operating Sequence ............................................................................................................................13
976*&!1796#7816 %
976+&8!,76 %
976&976 *
Removing Cabinet ....................................................................................................................................23
976 &8-7-61796 +
Cleaning the Cabinet Filter ....................................................................................................................24
Replacing the Outlet HEPA Filter.........................................................................................................25
Check the Outlet HEPA Filter..........................................................................................................25
Replace the Outlet HEPA Filter .......................................................................................................25
Replacing the Compressor Inlet HEPA Filter ....................................................................................26
Replacing the Muffler Assembly ............................................................................................................26
Cleaning the Heat Exchanger.................................................................................................................29
976"&91886 *%
Replacing Compressor Assembly .........................................................................................................31
Replacing Capacitor .................................................................................................................................33
Rebuilding the Thomas Model 2660 Compressor............................................................................34
Removing Compressor and Compressor Heads .........................................................................35
Rebuilding the Compressor...............................................................................................................38
976$&  6--6 +
Replacing P.E. Valve..................................................................................................................................42
976.&7-6#6 ++
Replacing Sieve Beds................................................................................................................................44

TABLE OF CONTENTS
Perfecto2™ 4Part No 1154245
669
976%'&9,9/6--6 +
Replacing Check Valves...........................................................................................................................46
976%%&8!86 +$
Replacing Regulator..................................................................................................................................48
Adjusting Regulator..................................................................................................................................49
976%&,609,8616 %
Replacing Heat Exchanger Assembly ...................................................................................................51
976%*&9866 *
Removing Control Panel.........................................................................................................................53
976%+&9766 
Replacing Cooling Fan .............................................................................................................................55
976%& 9 68#6 $
Replacing P.C. Board................................................................................................................................58
976% &88186 %
Replacing the Transformer.....................................................................................................................61
976%"&(679,6 
Replacing On/Off Switch.........................................................................................................................62
976%$&186 *
Replacing Flowmeter ...............................................................................................................................63
976%.&,!86186 +
Replacing Hour Meter .............................................................................................................................64
976'&6+6--(17#616 
Replacing 4-Way Valve and/or Manifold Assembly...........................................................................65
Replacing Pilot Valve Poppets and O-Rings........................................................................................68
976%&!8767#7986 "%
SensO2Alarm Indicators ........................................................................................................................71
Operation ..............................................................................................................................................71
IRC5PO2AW Indicator Lights Explanation....................................................................................71
IRC5PAW Indicator Lights Explanation..........................................................................................71
976&7176 "*
Autotuning (Model IRC5PO2AW Only)........................................................................................73
Manual Tuning (Model IRC5PAW Only)........................................................................................75

TABLE OF CONTENTS
Part No 1154245 5Perfecto2™
669
976*&/66 "
Leak Test ....................................................................................................................................................76
4 Way Valve Function Test....................................................................................................................78
976+&68166 $'
Alarm and Sensor Tests..........................................................................................................................80
Power Loss Alarm ...............................................................................................................................80
Low Pressure Test...............................................................................................................................80
Time-Out Test......................................................................................................................................81
High Pressure Test ..............................................................................................................................81
Oxygen Sensor .....................................................................................................................................82
P.E. Valve Coil Test .............................................................................................................................84
976&67-6#68!869,9/6 $
Checking Sieve Bed Pressure.................................................................................................................85
Disassembly...........................................................................................................................................85
Pressure Testing...................................................................................................................................85
717#6886 $"
Available At:...............................................................................................................................................87

SPECIAL NOTES
Perfecto2™ 6Part No 1154245
976
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242294797723456789
79
THE INFORMATION CONTAINED IN THIS DOCUMENT IS SUBJECT TO
CHANGE WITHOUT NOTICE.
 #8
DO NOT SMOKE while using this device. Keep all matches, lit cigarettes, candles,
or other sources of ignition out of the room in which this product is located and
away from where oxygen is being delivered.
NO SMOKING signs should be prominently displayed. Textiles and other materials
that normally would not burn are easily ignited and burn with great intensity in oxy-
gen enriched air. Failure to observe this warning can result in severe fire, property
damage and cause physical injury or death.
SIGNAL WORD MEANING
DANGER Danger indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
WARNING Warning indicates a potentially hazardous situation which, if
not avoided, could result in death or serious injury.
CAUTION
Caution indicates a potentially hazardous situation which, if
not avoided, may result in property damage or minor injury
or both.

FEATURES
Part No 1154245 7Perfecto2™
!8
FRONT VIEW
Power Inlet
Outlet Fitting*
Oxygen Outlet
Flowmeter
Oxygen Purity Indicator
Lights / Fault and Power
Indicator Lights (SensO2
Model Only)
Power Switch
Circuit Breaker
Hour
Meter
11 1771
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92667 79793479977 
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79977979878797
7877 74877997
7777 7
7787977777
77728777
87779977
9779799 787
79778779798787
78779797877
99 777997787
977777

TYPICAL PRODUCT PARAMETERS
Perfecto2™ 8Part No 1154245
7968#!96818
Electrical Requirements: 230 VAC ± 10% (253 VAC/207 VAC), 50 Hz
Rated Current Input: 1.4 A
Sound Level: 39.5 dBA Average
Altitude: Up to 1828 m (6,000 ft) above sea level without degradation of
concentration levels. Not recommended for use above 1828 m
(6,000 ft)
Oxygen Output
Concentration Levels:
2345677977897
79997797977
9
95.6% to 87% at 0.5 to 5 L/min
Maximum Outlet Pressure: 34.5 kPa ± 3.45 kPa. (5 p.s.i. ± 0.5 p.s.i.)
Flow Range: 0.5 to 5 L/min
For flowrates less than 1 L/min, we recommend the use of the
Invacare Pediatric Flowmeter IRCPF16AW Accessory
Low Flow Alarm: 0 L/min to 0.5 L/min
Rapid Audible Alarm Beeping (No Accessories Connected)
Average Power Consumption: 280 W (Operating @ 3 L/min)
Pressure Relief Mechanism Operational at: 241 kPa ± 24.1 kPa (35 p.s.i. ± 3.5 p.s.i.)
Change in maximum recommended flow
when back pressure of 7kPa is applied:
0.7 L/min
Filters: Cabinet, Outlet HEPA and Compressor Inlet
Safety System: Current overload or line surge shutdown. High temperature
compressor shutdown. High Pressure Alarm w/compressor shut-
down. Low Pressure Alarm w/compressor shutdown. Battery
Free Power Loss Alarm. SensO2Oxygen System (SensO2Model)
Low Flow Alarm
Width: 38.1 cm ± 1 cm (15 in. ± 3/8 in)
Height: 58.4 cm ± 1 cm (23 in. ± 3/8 in)
Depth: 30.5 cm ± 1 cm (12 in ± 3/8 in)
Weight: 21 kg ± 1 kg (45 lbs ± 2 lbs)
Shipping Weight: 23 kg ± 1 kg (50 lbs ± 2 lbs)
Operating Ambient
Temperature:
50°F - 95°F (10°C - 35°C) at 20-60% relative humidity
Exhaust: Less than Ambient +19°C (+ 35°F)
Oxygen Output: Less than Ambient +3°C (+ 6°F)
Cabinet: Impact Resistant flame-retardant plastic cabinet that conforms to
UL 94-V0
Electrical: No extension cords

TYPICAL PRODUCT PARAMETERS
Part No 1154245 9Perfecto2™
IRC5PO2AW INDICATORS
IRC5PAW INDICATORS
Placement: No closer than 7.62 cm (3 inches) from any wall, furniture, drap-
eries, or similar surfaces
Tubing: 2.1 m (7 ft) cannula with a maximum 15.2 m (50 ft) of
Crush-Proof Tubing (DO NOT pinch)
Relative Humidity: 20 to 60%
Time of Operation: Up to 24 hours per day
Recommended Storage and Shipping Temper-
ature:
-29°C to 65°C (-20°F to 150°F), at 15-95% relative humidity
Standards and Regulatory Listing: IRC5PO2AW/IRC5PAW
IEC/EN61000-3-2
IEC/EN61000-3-3
IEC/EN 60601-1, A1, A2
IEC/EN 60601-1-2
IRC5PO2AW Models Only
ISO8359
MDD
CE marked model IRC5PO2AW
LABEL
SYMBOL
O2PURITY INDICATOR LIGHTS
(LED)
SYSTEM OKAY
O2over 85% (± 2%)
GREEN Indicator Light
O2Between 73% (± 3%)
to 85% (±2%)
YELLOW Indicator light
A. YELLOW Solid
B. YELLOW Flashing Sensor
Failure
Call a qualified technician.
SYSTEM FAILURE
O2Below 73% (±3%)
RED Indicator Light
Continuous Audible Alarm
Sieve-GARD Compressor Shut-
down.
LABEL
SYMBOL
STATUS INDICATOR LIGHTS
(LED)
SYSTEM OKAY GREEN Indicator Light
SYSTEM FAILURE RED Indicator light
Continuous Audible Alarm
Sieve-GARD™Compressor
Shutdown
Call a qualified technician
O
2
I/O

SECTION 1—IMPORTANT SAFEGUARDS
Perfecto2™ 10 Part No 1154245
976%&7186
!8#
Important Safeguards
47979747757245665294756754795294797797
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 87
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 #8
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1
5598565368565885255652658565685922
558576565535799852658595
536863552698522265565275629583856583533835685
2565256858583385838533835585485576585
6856865255682635599568568582855
538559235983358688558
Operating Information
979279547 455794757579445977947547
4424379757242797724757572719729797952947577
52797627
797967776745478476337247577797
277847497247
7794477944597247556667972782797934794459797
9347572
7793472437975474279797477275765477
92437527294769243754758579757979757246243757
5797547226576256756254
Radio Frequency Interference
272475747754794797967827762272277 
7776227572347979275759456792947535247
695342724472475725672567245665294

SECTION 1—IMPORTANT SAFEGUARDS
Part No 1154245 11 Perfecto2™
727572472447974776987667976953427
22947277759754579724727722947977
97275243772447477977 7724478277
97279747797275243772447 4775757
24475777979779479779669824375
 92294769579724577552947847724
 944772472497547967947572272479757978277
972727944
927529479754757457256793472472724675797
52762275775477972294

SECTION 2—INSTALLATION/SEQUENCE OF OPERATION
Perfecto2™ 12 Part No 1154245
976&77(
)!96687
Verification of Battery Free Power Loss Alarm
77979445979797952437942294
 7742757472476982437575669872797857797997
579795243
 794459757479774794797979727947975377
5779879765794479879797967547477
9445979474769879496749794698275476987826673247
 717698757972724777427479772474747
4279
 4637798797547747 782797747 792294747
2424752675657826679472794279795294797757
79879765747478277 
 944798797979675474794794459742782667794757
 77934794452947722529475772474424372
Sequence of Operation
4243747 77987827562777977997997977
549799624375475477247227795
99752747799725775247267547799724672677
52727977772947247799797577977577
27
7245775724575757575437277976987
757977527477857567 72747544679757277
945242437759294752567229479845797727757
79726772427727782727457977592947977
5667594797652677934747797977947793757
2276572477756252947756782775654742437579537
547742934797275757977793778575672497
997527767276957577574797756797677947977
57572727794459
793474972437797572754467249779537547727
9347273657984797757727475475576985243727
698793767726754775674797977524
I/O
I/
/O
I/

SECTION 2—INSTALLATION/SEQUENCE OF OPERATION
Part No 1154245 13 Perfecto2™
762567525294797785756727596277797794777
749754779576942784777575779247977
577279769877247547597977577279769877
247547698772784767274479475627698757547244567
4294456759
77567947729797727977857567275669872367
944579347974777577977972752294567
756698777975727675757237777567826676977
5772797785756
75247987276977577987976578266794757977827
576943757576674275727827572534927565775723456727
745277976256775642947796992437327247
27545676524775657723456754759472475267797
9699243794753 
SensO2Oxygen Sensor Technology - Ceramic Zirconia
Sensor
Technical Description
7934724379777944597698797977975475472497
76987756676987979347977742727479375722947
92279779347497947947724722795
7793474774972757937574754794577424372
6274769824379375756726729757727247797
1
7
34796679457769797727547275769479797
93472947793472947575579776979477997977294257
424372757977567797729425794679347294754757
93747793472947577997697757694757
65797793472947547934796674797752774797
694727267657977934794452947769475679777
95787757947547793479445294752437275665
7299979477795794524798575724772345672437
27977497 795772345679762425667556762271234567
927977624256675567622734579472477979762375267
24259754977984
Operating Sequence
477987827574747947 7714722782667852727247
97794459797324792437624256675567934754779347
497975262777623782667266245724252437495677952947
82677934749727852437
I/

SECTION 2—INSTALLATION/SEQUENCE OF OPERATION
Perfecto2™ 14 Part No 1154245
72724727793472777777762378266794247
97266245
7793476672749759777757727272477782667
942479794297775478527975752797724797579757
777975252437547565742944567597757698796537237
56279753797752478266757727279757777
7793476672749759777782247727724779347
944529475657478266752575477427826677984
47934794452947275977777497579347277
7247 75752437566769877775776237826672662457 77
9347275667698777777623651984797826675257

SECTION 3—PNEUMATIC DIAGRAM
Part No 1154245 15 Perfecto2™
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Perfecto2Oxygen Concentrator
Flowmeter
Ouput
HEPA Filter
Output
Check
Valve
Patient
Output
Oxygen Sensor
(SensO2models Only)
Pressure Sensor
p.s.i. O2
P. C . B o a r d
Pressure
Regulator
Product
Ta n k
Check
Valves
Air Inlet
Cabinet
Filter
Compressor
Inlet Filter
Sieve
Bed
Sieve
Bed
P. E . V a l v e
4-way
Valve
Compressor
Relief
Valve
Heat
Solenoid
Pilot
Exhaust
Muffler
LEGEND Pneumatic Connections Electrical Connections

SECTION 4—TROUBLESHOOTING
Perfecto2™ 16 Part No 1154245
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SYMPTOM PROBABLE CAUSE SOLUTION
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 to
recharge.
Power loss:
Internal Status Indicators:
RED: Off
GREEN: Off
Unit plugged in, power switch
, alarm off, battery Free
circuit drained.
No power at outlet. Check electrical outlet with a table lamp
or voltmeter set on 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.
Power cord:
a. Frayed.
b. Broken or damaged spade.
c. Spade connector from power
cord loose or disconnected
(inside back of unit).
a. Reattach cord.
b. Replace power cord connectors on
plug.
c. Reattach connector.
On/Off switch.
a. Disconnected wire.
b. Faulty switch.
Check all electrical connections to the
ON/OFF switch for any
disconnected wires.
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.
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.
I/
I/O
I/O

SECTION 4—TROUBLESHOOTING
Part No 1154245 17 Perfecto2™
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. Refer to
Replacing P.C. Board on page 58.
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.
Transformer assembly.
a. Faulty.
b. Connector loose or
disconnected.
c. Faulty wiring.
a. Replace. Refer to Replacing the
Transformer on page 61.
b. Reattach connector.
c. Replace transformer assembly. Refer
to Replacing the Transformer on
page 61.
P.C. board faulty. Replace P.C. board. Unit requires retiming
after P.C. board replacement. Refer to
Replacing P.C. Board on page 58.
High Pressure:
Internal Status Indicators:
RED: One Flash
GREEN: Two Flashes
Unit plugged in, power switch
on, continuous alarm.
Compressor shut down.
P.C. board:
a. Malfunction
b. Disconnected wire.
c. Shifting valve at pressures greater
than 25 p.s.i. for Perfecto2.
a. Set flow to max L/min. for
concentrator. Check voltage across
Pilot Valve 1 on volt DC 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. Refer to Replacing P.C.
Board on page 58.
4-way Valve:
a. Not shifting.
b. Bad coil.
c. Coil resistance.
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 on page 65.
b. Replace 4-way valve. Refer to
Replacing 4-Way Valve and/or
Manifold Assembly on page 65.
c. Coil should read 175 ohms ± 20.
SYMPTOM PROBABLE CAUSE SOLUTION

SECTION 4—TROUBLESHOOTING
Perfecto2™ 18 Part No 1154245
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).
Compressor inlet filter dirty or
plugged.
Replace compressor inlet filter. Refer to
Replacing the Compressor Inlet HEPA
Filter on page 26.
Compressor:
a. Leaks at fittings or tubing
b. Leaking or defective relief valve.
c. Insufficient voltage at outlet.
d. Worn cup seals or gaskets.
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 on page 34.
Heat exchanger:
a. Leak at tubing or body chamber.
b. Inspect tubing and heat
exchanger.
a. Replace or retighten.
b. Replace or retighten tubing. Replace
heat exchanger. Refer to Replacing
Heat Exchanger Assembly on
page 51.
Regulator cracked or leaking. Replace regulator. Refer to Replacing
Regulator on page 48.
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. Refer to Replacing P.C. Board
on page 58. If the P.C. board voltage acts
normally, replace the P.E. valve. Refer to
Replacing P.E. Valve on page 42.
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.
Defective main valve coil. a. Replace main valve.
b. Replace main valve coil.
Connector loose. Reattach connector.
Defective P.E. valve coil. (Resistance
80 ohms ± 10.)
Replace P.E. coil if shorted or open on
resistance check. Refer to Replacing P.E.
Valve on page 42.
Defective P.E. valve. Replace P.E. valve. Refer to Replacing P.E.
Valve on page 42.
Connector loose. Reattach connector.
Defective P.C. board. Replace P.C. board. Refer to Replacing
P.C. Board on page 58.
SYMPTOM PROBABLE CAUSE SOLUTION

SECTION 4—TROUBLESHOOTING
Part No 1154245 19 Perfecto2™
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.Refer to Replacing P.C.
Board on page 58.
Low Concentration: NOTE:
Check for O2purity 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: SensO2ONLY:
RED: On
YELLOW: Off
GREEN: Off
For SensO2units, the RED
indicator will signal extremely
low purity and will be
accompanied by a continuous
audible alarm and a system
shutdown. Repairs are
required.
Cabinet filters dirty. Clean or replace. Refer to Cleaning the
Cabinet Filter on page 24, Replacing the
Outlet HEPA Filter on page 25, and
Replacing the Compressor Inlet HEPA
Filter on page 26.
Compressor inlet filter dirty. Replace inlet filter. Refer to Replacing the
Compressor Inlet HEPA Filter on page 26.
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).
a. Replace compressor. Refer to
Replacing Compressor Assembly on
page 31.
b. Replace capacitor. Refer to Replacing
Capacitor on page 33.
c. Replace compressor.
d. Rebuild top end of compressor. Refer
to Rebuilding the Thomas Model
2660 Compressor on page 34.
e. Replace compressor.
f. Replace fittings or tubing.
g. Replace relief valve.
h. DO NOT use extension cords.
Heat exchanger:
a. Leak at tubing or body chamber.
b. Inspect tubing and heat
exchanger.
a. Replace or retighten.
b. Replace or retighten tubing. Replace
heat exchanger. Refer to Replacing
Heat Exchanger Assembly on
page 51.
Regulator cracked or leaking. Replace. Refer to Replacing Regulator on
page 48.
Exhaust muffler dirty or plugged. Replace. Refer to Replacing the Muffler
Assembly on page 26.
Fan:
a. Not operating. Unit overheating.
b. Faulty fan.
a. Leads to fan disconnected.
Reconnect.
b. Replace.Refer to Replacing Cooling
Fan on page 55.
Sieve beds defective. Replace. Refer to Checking Sieve Bed
Pressure on page 85.
Tubing kinked or blocked. Repair or replace.
P.C. board:
a. Shifts at wrong pressures.
Check pressure at product tank. Pressure
should rise to 144.79 kPa (21 p.s.i.) at shift
point. If not, replace P.C. Board. Refer to
Replacing P.C. Board on page 58.
SYMPTOM PROBABLE CAUSE SOLUTION

SECTION 4—TROUBLESHOOTING
Perfecto2™ 20 Part No 1154245
Low Concentration
(Continued)
Flowmeter:
a. Flowmeter opened beyond
maximum flow rate.
b. Cracked or broken fitting.
c. Input tubing leaking or loose.
a. Return flow to maximum setting.
b. Replace fitting.
c. Repair or replace. Refer to Replacing
Flowmeter on page 63.
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. Refer to
Timing on page 73.
P.E. valve:
a. Bad coil.
b. Restrictor blockage.
a. Replace P.E. valve.
b. Replace P.E. valve. Refer to Replacing
P.E. Valve on page 42.
Inspect P.C. board restrictor tubing
for kinks or tears.
Replace P.C. board. Unit may need
retiming after board replacement. Refer to
Replacing P.C. Board on page 58.
Fluctuating Flow: Regulator/Flowmeter:
a. Incorrectly set regulator.
b. Flowmeter malfunction.
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. Refer to Replacing
Flowmeter on page 63.
Outlet HEPA filter:
a. Dirty or plugged a. If low flow conditions persist, replace
outlet HEPA filter. Refer to Replacing
the Outlet HEPA Filter on page 25.
Unit Excessively Loud: Pneumatic exhaust:
a. Muffler cracked, damaged or
missing.
b. Muffler tubing disconnected or
damaged.
a. Replace. Refer to Replacing the
Muffler Assembly on page 26.
b. Reconnect or replace tubing.
Compressor inlet filter missing and/or
orange sticker removed.
a. Replace compressor inlet filter. Refer
to Replacing the Compressor Inlet
HEPA Filter on page 26.
Compressor removed. a. Replace Compressor. Refer to
Replacing Compressor Assembly on
page 31.
Incorrect style of inlet filter
(aftermarket).
a. Replace with factory OEM sound
reduced style inlet HEPA filter.
SYMPTOM PROBABLE CAUSE SOLUTION