LT-2023
10
TROUBLESHOOTING CHART A
Visible Alarm Audible Alarm Compressor Power Light
OFF OFF ON ON
Other Symptoms Possible Cause Possible Remedy
Pulsating air noise Intake filter not in place or defective Check filter and replace if necessary
Compressor intake hose disconnected Reconnect hose
Excessive noise Loose or defective motor mounts Replace motor mounts
Defective compressor Replace compressor
Defective cooling fan Replace cooling fan
Fluctuating oxygen flow Occluded humidifier Clean or replace humidifier
Use of improper humidifier Use only a bubble-type humidifier
Occluded filters Clean or replace filters
Occluded or defective cannula and tubing Detach cannula from oxygen delivery tubing. If
proper flow is not attained, check tubing for
kinks or other obstructions. Clean or straighten
as required or replace tubing if necessary.
Use of excess oxygen tubing The unit is designed to deliver 5 lpm with a
cannula on 50 feet (15 meters) of approximately
5/32” (4 mm) inside diameter tubing. Smaller
diameter tubing or the addition of any other
flow restriction may prevent obtaining the
desired flow rate.
Defective flow meter Replace flow meter
Leak in system Check for leaks in all hoses and fittings
Defective compressor Replace compressor
Defective compressor reed valve Replace compressor reed valve
Defective check valve Replace check valve
Pressure regulator not adjusted Adjust or replace pressure regulator
properly or defective
Little or no oxygen flow Flow meter not adjusted properly Adjust flow meter
Hose disconnected to flow meter Reconnect hose
Oxygen delivery tubing is kinked or blocked Straighten tubing or remove obstruction
Occluded humidifier Clean or replace humidifier
Low oxygen concentration Leak in system Check for leaks in all hoses and fittings
Defective sieve bed check valve Replace check valve
Defective compressor reed valve Replace compressor reed valve
Defective compressor Replace compressor
Rotary valve not operating correctly Replace valve
Occluded filters Clean or replace filters
Contaminated sieve beds Replace sieve beds
Audible alarm does not Unit has not been used for an extended Allow unit to run for 20 minutes and retry
sound during power failure period of time. NOTE–If the concentrator
has been unused for an extended period,
the unit must run several minutes before
the power fail alarm will activate.
Defective PC board Replace PC board
Defective power switch Replace power switch
Defective wire harness Replace wire harness
Audible alarm does not sound when Defective PC board Replace PC board
unit is turned “On”
Pressure relief valve activated - PC board connectors not properly latched Be sure tabs are pushed completely into place
“popping” sound Defective PC board Replace PC board
Defective rotary valve Replace valve
Service Required light does not PC board connectors not properly latched Be sure tabs are pushed completely into place
illuminate when unit is turned “On” Defective PC board Replace PC board
Defective light Replace light
TROUBLESHOOTING
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