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TROUBLESHOOTING
TROUBLESHOOTING CHART F (OSD UNITS ONLY)
Compressor Power Light
ON ON
Other Symptoms Possible Cause Possible Remedy
No OSD lights are illuminated. Defective OSD or malfunctioning concentrator. Check concentration with an oxygen analyzer.
If the concentration is within specification, replace
the OSD (early OSD models only). Replace the
PC board on later OSD models. If the concen-
tration is low, refer to low oxygen concentration
symptom in Troubleshooting Chart A.
No OSD lights are illuminated, Oxygen level is low* Check concentration with an oxygen analyzer.
but red “Service Required” light is If the concentration is within specification, replace
illuminated accompanied by a the PC board. If the concentration is low,
beeping audible alarm. refer to low oxygen concentration
(later OSD models only) symptom in Troubleshooting Chart A.
Both OSD lights are illuminated. Connector off between OSD and PC board. Reconnect connector.
(early OSD models only) Defective OSD Replace OSD.
Yellow Low Oxygen light Oxygen level is low* Check concentration with an oxygen analyzer.
is illuminated. If the concentration is within specification, replace
the OSD (early OSD models only). Replace the
PC board on later OSD models. If the concen-
tration is low, refer to low oxygen concentration
symptom in Troubleshooting Chart A.
Yellow Low Oxygen light Oxygen level is low* Check concentration with an oxygen analyzer.
is illuminated and an intermittent If the concentration is within specification, replace
audible alarm sounds every the OSD (early OSD models only). Replace the
five seconds. PC board on later OSD models. If the concen-
tration is low, refer to low oxygen concentration
symptom in Troubleshooting Chart A.
*Refer to “Specifications” page for oxygen purity levels.
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