Invacare Platinum IRC5LXO2AW Service Manual page 23

SYMPTOM
Low Concentration (Continued)
Fluctuating Flow
Unit Excessively Loud
Part No 1118396
PROBABLE CAUSE
P.C. board:
a. Shifts at wrong pressures
Flowmeter:
a. Flowmeter opened beyond
maximum flow rate
b. Cracked or broken fitting
c. Input tubing leaking or loose
Autotuning
PE valve:
a. Bad coil
b. Restrictor blockage
Inspect P.C. board restrictor tubing for
kinks or tears
Regulator/Flowmeter:
a. Incorrectly set regulator
b. Flowmeter malfunction
Outlet HEPA filter:
a. Dirty or plugged
Pneumatic exhaust:
a. Muffler cracked, damaged or
missing
b. Muffler tubing disconnected or
damaged
Compressor inlet filter missing and/or
orange sticker removed
Compressor noisy
Incorrect style of inlet filter
(aftermarket)
23
SECTION 4—TROUBLESHOOTING
SOLUTION
Check pressure at product tank. Pressure should
rise to 144.79 kPa (21 psi) at shift point. If not,
replace P.C. Board. Refer to Replacing P.C. Board
on page 54.
a. Return flow to maximum setting.
b. Replace fitting.
c. Repair or replace. Refer to Replacing
Flowmeter on page 58.
To accommodate for varying tolerances when
replacing components, autotuning is used to
control the shifting of the Pressure Equalization
(PE) valve. Refer to Autotuning on page 69.
a. Replace PE valve. Refer to Replacing PE
Valve on page 38.
b. Replace PE valve. Refer to Replacing PE
Valve on page 38.
Replace P.C. board. Refer to Replacing P.C. Board
on page 54.
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 34.5 ± 3.45 kPa (5 ± 0.5
psi) for 5 Liter; 62.05 kPa ± 3.45 kPa (9 ±
0.5 psi) for 9 Liter, replace flowmeter. Refer
to Replacing Flowmeter on page 58.
a. If low flow conditions persist, replace outlet
HEPA filter. Refer to Replacing the Outlet
HEPA Filter on page 27.
a. Replace. Refer to Inspecting/Replacing
Throttling Muffler For Platinum 5 AW on
page 30.
b. Reconnect or replace tubing. Refer to
Inspecting/Replacing Throttling Muffler For
Platinum 5 AW on page 30.
a. Replace compressor inlet filter. Refer to
Replacing the Compressor Inlet Filter on
page 28.
a. Replace Compressor. Refer to Compressor
on page 35.
Replace with factory OEM sound reduced style
inlet HEPA filter. Refer to Replacing the Outlet
HEPA Filter on page 27.
Platinum Oxygen
®