AirSep AS-D User Manual

AirSep
®
Corporation
AS-A—AS-P Series Instruction Manual 8-3
Problem Probable Cause Solution
Inadequate cycle
pressure.
Adjust or replace feed air
regulator.
Oxygen demand exceeds
oxygen generator
capacity.
Check oxygen usage or
check unit and oxygen
hoses and piping for leaks.
Oxygen purity below
specified purity (50–70%).
Low purity oxygen during
initial start-up.
Start unit as described in
Chapter 6.
Unit shut down for
extended period—no
pressure in oxygen system.
Start unit as described in
Chapter 6.
Momentary power loss. Vent low purity oxygen
from system as described
in Chapter 6.
Inadequate feed air. Check air lines for
obstructions or adjust or
replace feed air regulator.
Valves not cycling
properly.
See valve sequence in
Appendix A.
Improperly wired or
defective circuit
board/PLC.
Check the wiring or
replace circuit board/PLC.
Torn valve diaphragm. Identify defective valve
and rebuild valve.
Solenoid valve not functioning properly. Check for the
following causes:
Defective coil. Replace coil.
Loose or defective wire to
valve.
Repair or replace wire.
Defective circuit
board/PLC. (No power
output to valve.)
Replace circuit board/PLC.
Valve remains energized
and open.
Check the valve or the
circuit board/PLC.
Defective valve. Rebuild valve.
Worn internal parts on
valve.
Rebuild valve.
Valve makes loud
“chattering” noise.
Low voltage. Check power supply.
Low voltage circuit
board/PLC output.
Replace circuit board/PLC.
Dirty valve. Clean or rebuild valve.
Worn valve core. Rebuild valve.
Defective EMI filter. Replace EMI filter.
Very low purity oxygen
output (21–50%).
Leaking check valves. Clean or replace check
valves.
Plugged muffler. Replace muffler.

AirSep AS-D Specifications

General

Brand	AirSep
Model	AS-D
Category	Oxygen Equipment
Language	English