29
Troubleshooting
En
glish
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 18).
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.
FiO
2
sensor calibration failure
FiO
2
sensor is not attached properly.
For the correct attachment of the FiO
2
sensor, see “Using the FiO2 monitoring
sensor” on page 10.
FiO
2
sensor is used or defective.
If the lifetime of the FiO
2
sensor has
exceeded one year please replace the
FiO
2
sensor and start calibration again.
LCD:
is displayed in the header.
Battery is not charging.
•
Ensure the ambient temperature
conditions are within the specified
operating range. If the problem persists
within the specified operating conditions
please return the device for servicing.
•
Power off the device. Power on the
device again.
Problem / possible cause
Solution
