AirSep Onyx Instruction Manual page 30

Problem
Pressure of product oxygen
changes unexpectedly.
"Popping" sound indicates
release of relief valves.
Chattering or buzzing noise
from solenoid valve(s).
8-4
Probable Cause
Relief valves release.
Improperly set or defective
pressure regulator.
Leak in unit.
Defective air compressor.
Leak in unit.
Contaminated adsorbers.
Defective solenoid valve(s).
Defective circuit board.
Improperly set or defective
pressure regulator.
Obstructed exhaust muffler.
Defective or worn solenoid
valve(s).
Low voltage to valve(s).
Onyx/Onyx+/Onyx Ultra Instruction Manual
®
AirSep Corporation
Solution
Refer to "'Popping' sound
indicates release of relief
valves" problem in
troubleshooting chart.
Check regulator setting or
replace defective regulator.
Pressurize unit, set ON/OFF
power switch to OFF, and
disconnect main power
supply. Remove panels and
make sure tubing remains
connected to fittings. Use
soapy water to check all
hoses, tubing, and fittings in
unit. Most leaks are audible
when area is quiet. Repair
leaks as necessary.
Replace air compressor.
Pressurize unit, set ON/OFF
power switch to OFF, and
disconnect main power
supply. Remove panels and
make sure tubing remains
connected to fittings. Use
soapy water to check all
hoses, tubing, and fittings in
unit. Most leaks are audible
when area is quiet. Repair
leaks as necessary.
Replace adsorbers.
Repair or replace solenoid
valve(s).
Replace circuit board.
Check regulator setting or
replace defective regulator.
Replace exhaust muffler.
Repair or replace solenoid
valve(s).
Make sure electrical power
remains within specification
in Appendix A of this
instruction manual. If power
at inlet to unit is correct but
is low at valve(s), contact
AirSep Commercial Products
Service Department.