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Treatment pressure seems high
Pressure required for treatment may
have changed.
Consult your clinician.
There is a change in the impedance in the
circuit configuration.
Perform the Learn Circuit function.
The device does not start when you breathe into the mask
SmartStart/Stop not on. Consult your clinician.
Breath is not deep enough to trigger
SmartStart.
Take a deep breath in and out through the
mask.
There is excessive leak. Adjust position of mask and headgear.
Plug(s) missing from port(s) on mask. Replace plug(s).
Air tubing is not connected properly. Connect firmly at both ends.
Air tubing is kinked or punctured. Straighten or replace tubing.
There is a large impedance (eg,
antibacterial filter) in the air circuit.
Perform the Learn Circuit function.
The device does not stop when you remove your mask
SmartStart/Stop is disabled. Consult your clinician.
Use of a full face mask or tracheostomy
tube.
SmartStart is disabled if Full face mask or
Trach is selected as interface.
Incompatible accessories (eg, humidifier
or mask system) with high resistance
being used.
Use only equipment as recommended
and supplied by ResMed.
High Leak Alarm or Low Min Vent alarms
are set to ON.
Consult your clinician.
“Confirm Stop” is enabled. Consult your clinician.
High Leak Alarm is enabled, but alarm does not activate when the mask
is removed during treatment
Incompatible air delivery system being
used.
Use only equipment as recommended
and supplied by ResMed.
Pressure settings are too low for the air
delivery components being used.
Perform the Learn Circuit function to
adjust the therapy pressure according to
your air tubing system.
Learn Circuit failed
• The circuit configuration is
inappropriate as the impedance
detected is too high.
• Too many components have been
included or the impedance of
accessories in use is above ResMed’s
recommendation, eg, type of filter,
external humidifier, air tubing.
Review the components included in the
circuit configuration and adjust as
appropriate, then rerun Learn Circuit (see
“Setup menu” on page 16).
The delivered airflow is not humid/heated although the H4i humidifier is
in use
The humidifier is not properly attached. Correctly attach the humidifier.
The humidifier does not heat. The device is currently powered by
battery use or not connected to the
mains.
Problem / possible cause Solution
248705 Stellar 100 and 150 User Guide EUR1.book Page 26 Monday, October 21, 2013 10:40 AM