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SECTION 4—TROUBLESHOOTING
Platinum™Series 22 Part No 1110538
LOW
CONCENTRATION
(Continued)
P.C. board:
a. Shifts at wrong pressures.
Check pressure at product tank. Pressure
should rise to 21 p.s.i. (25 p.s.i. for
Platinum 10) at shift point. If not, replace
P.C. Board. Refer to Replacing P.C. Board
on page 66.
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 70.
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 the Platinum 5, XL, and 10
Concentrators on page 85.
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 53.
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 66.
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. ± 0.2 max. [34.4
kPa ± 6.89]), replace flowmeter.
Refer to Replacing Flowmeter
on
page 70.
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 27.
SYMPTOM PROBABLE CAUSE SOLUTION