CAIRE HELiOS Marathon H850 Home Use Manual page 47

Troubleshooting
3. Excessive frost and hissing.
4. The H850 Portable stops pulsing during use.
44
• Some hissing and frosting on the H850 Portable is
normal. If, however, the hissing sound from the
H850 Portable continues after a fill or anytime
during usage, combined with excessive frosting
on the H850 Portable, stop using the H850
Portable and contact your Homecare Provider.
• Excessive frost formation on the H850 Portable
30 minutes after a fill while the Flow Control
knob is in the OFF position may be a result of
possible system malfunction. Stop using the H850
Portable and contact your Homecare Provider for
service.
• Ensure that both connections of the dual-lumen
cannula are firmly attached to the Oxygen Outlet
and Sensor connectors.
• Change the cannula if water droplets are present
from humidified exhaled gas. Replacing the
cannula with a dry one enhances the ability of the
H850 Portable to pulse.
• Ensure that the cannula is not kinked or pinched.
• Ensure that the cannula tips remain in your
nostrils and do not slide to one side.
• Ensure that there is oxygen in the H850 Portable.
• With the cannula on, close your mouth and
breathe only through your nose to verify that the
H850 Portable has stopped pulsing.
H850 Home Use Guide