English
23
Problem / possible cause
Solution
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,
bacterial/viral 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 (refer to
Setup menu).
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.
The humidifier does not work.
Return the device and the humidifier for servicing.
The water chamber is empty.
Fill the water chamber of the humidifier.
USB stick is not readable or writeable
The USB stick contains unreadable data,
does not have enough space available, is
not compatible with the device.
Consult your clinician.
USB stick is defective.
Replace the USB stick after consulting your clinician.
FiO2 sensor calibration failure
FiO2 sensor is not attached properly.
For the correct attachment of the FiO2 sensor, refer to Using
the FiO2 monitoring sensor.
FiO2 sensor is used or defective.
If the lifetime of the FiO2 sensor has exceeded one year
please replace the FiO2 sensor and start calibration again.
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