AirSep
®
Corporation
8-4 AS-A—AS-P Series Instruction Manual
Problem Probable Cause Solution
Contaminated molecular
sieve in adsorbers.
Replace molecular sieve.
Oxygen generator outputs
particulates (dusting).
Feed air regulator set
improperly set.
Adjust feed air regulator.
Contaminated molecular
sieve in adsorbers.
Contaminated molecular
sieve in adsorbers.
System not cycling
properly.
Check and repair or
replace faulty wiring
and/or circuit board.
Feed air regulator leaks out
bleed orifice.
Stuck feed air regulator
main valve assembly.
Clean and lubricate main
regulator valve assembly.
Defective main valve
assembly seat.
Rebuild or replace
regulator.
Oxygen generator relief
valves open.
Cycle pressure exceeds
the maximum pressure
specified.
Adjust feed air regulator.
Stuck feed air regulator
main valve assembly.
Rebuild or replace
regulator.
Frozen feed air regulator
main valve assembly.
Make sure ambient
temperature exceeds 40’F.
Defective cycle pressure
gauge.
Replace gauge and adjust
feed air regulator.
Defective relief valve. Replace relief valve.
Filter drain valve remains
open. (Valve not energized.)
Valve obstructed. Clean or replace valve.
Filter drain valve remains
energized.
MANUAL DRAIN valve
button stuck.
Replace button.
Defective circuit board. Replace circuit board.
Filter drain valve does not
energize.
Defective MANUAL DRAIN
valve button.
Replace button.
Loose or defective wire to
valve.
Repair or replace wire.
Defective valve coil. Replace valve.
Valve core stuck in closed
position.
Replace valve.
Defective circuit
board/PLC. (No power
output to valve.)
Replace circuit board/PLC.
Filter drain valve energizes
with unit pressurized, but no
air exhausts.
Drain valve obstructed or
stuck in closed position.
Clean or replace valve.
Drain tubing obstructed or
pinched.
Clean or replace tubing.
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