AirSep AS-E - Page 52

52 AS-D+—AS-P Series Instruction Manual
AirSep Corporation
Problem Probable Cause Solution
Valve makes loud
“chattering” noise.
Low voltage. Check power supply.
Low voltage PLC
output.
Replace PLC.
Dirty valve. Clean or rebuild valve.
Worn valve core. Rebuild valve.
Defective EMI lter. Replace EMI lter.
Very low concentration
oxygen output (21–
50%).
Oxygen sample ow
line obstructed.
Ensure that all
the valves on the
oxygen sample line
to the concentration
monitoring board are
open.
Ensure that the oxygen
regulator on the oxygen
sample line is set at ~6
psig.
Leaking check valves.
Clean or replace check
valves.
Plugged mufer. Replace mufer.
Oxygen concentration
monitoring board
defective.
Replace the oxygen
concentration
monitoring board.
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 PLC.
Feed air regulator leaks
out bleed orice.
Stuck feed air regulator
main valve assembly.
Clean and lubricate
main regulator valve
assembly.
Defective main valve
assembly seat.
Rebuild or replace
regulator.