6. TROUBLESHOOTING
20
6 Troubleshooting Guide
Symptom
Possible causes
Solution
Remark
Elapsed time
meter displays,
the green and
yellow lights are
on, but the
oxygen
concentrator
stops running
immediately and
has a continuous
audible alarm.
1) The valve's plug has
not been inserted
completely
1) Check and connect
the circuit board to the
valve’s plug.
Repairs must
be performed
by qualified
service
personnel.
2) Exhaust sound buffer
box jammed.
2) Replace it.
3) Valve is unable to
open.
3) Replace it.
4) Failure of the main
electronic control circuit
board.
4) Replace it.
The nasal
cannula has more
fogging or
droplets.
1) The unit is not properly
ventilated, so operating
temperature is too high.
1) Make sure the
machine is at least 10
cm away from walls,
heaters and other
obstructions..
2) Fan inside the
machine is unable to run
or running speed is slow
making the operating
temperature too high.
2a) Remove any
obstructions blocking
the fan.
Repairs must
be performed
by a qualified
service
personnel.
2b). Replace it.
3) Temperature of the
water in humidifier bottle
is too high.
3) Add cold water to
the humidifier bottle.
4) Too much water was
added to the humidifier.
4) Water added
should between the
maximum and
minimum level.
