AirSep AS-20 Instruction Manual page 52

12/02
Problem
Oxygen generator outputs
particulates (dusting).
Feed air regulator leaks out
bleed orifice.
Oxygen generator relief
valves open.
Filter drain valve remains
open. (Valve not energized.)
Filter drain valve remains
energized.
Filter drain valve does not
energize.
Filter drain valve energizes
with unit pressurized, but no
air exhausts.
8-4
Probable Cause
Excess feed air pressure.
Feed air regulator set
above 485 kPa (70 psig).
Contaminated molecular
sieve in adsorbers.
System not cycling
properly.
Stuck feed air regulator
main valve assembly.
Defective main valve
assembly seat.
Cycle pressure exceeds
485 kPa (70 psig)
maximum.
Stuck feed air regulator
main valve assembly.
Frozen feed air regulator
main valve assembly.
Defective cycle pressure
gauge.
Defective relief valve.
Valve obstructed.
MANUAL DRAIN valve
button stuck.
Defective circuit board.
Defective MANUAL DRAIN
valve button.
Loose or defective wire to
valve.
Defective valve coil.
Valve core stuck in closed
position.
Defective circuit board.
(No power output to
valve.)
Drain valve obstructed or
stuck in closed position.
Drain tubing obstructed or
pinched.
®
AirSep Corporation
Solution
Make sure maximum feed
air pressure does not
exceed 1,035 kPa (150
psig).
Adjust feed air regulator.
Contaminated molecular
sieve in adsorbers.
Check and repair or
replace faulty wiring
and/or circuit board.
Clean and lubricate main
regulator valve assembly.
Rebuild or replace
regulator.
Adjust feed air regulator.
Rebuild or replace
regulator.
Make sure ambient
temperature exceeds 4°C
(40°F).
Replace gauge and adjust
feed air regulator.
Replace relief valve.
Clean or replace valve.
Replace button.
Replace circuit board.
Replace button.
Repair or replace wire.
Replace valve.
Replace valve.
Replace circuit board.
Clean or replace valve.
Clean or replace tubing.
AS-20—1000 Instruction Manual