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Troubleshooting
If there is a problem, try the following suggestions. If the problem cannot be solved, contact your
equipment supplier or ResMed. Do not attempt to open the device.
Problem/Possible cause Solution
No display
Power is not connected. Ensure the power cord is connected and the power outlet (if
available) is on.
The DC plug is partially inserted into
the back of the device or inserted
too slowly.
Fully insert the DC plug.
The S9 VPAP Tx and H5i are not
connected correctly.
Ensure that the S9 VPAP Tx and H5i are securely attached.
Insufficient air delivered from the device
Air filter is dirty. Replace air filter.
Air tubing is not connected properly. Check air tubing.
Air tubing is blocked, pinched or
punctured.
Unblock or free the air tubing. Check the air tubing for
punctures.
Mask and headgear are not
positioned correctly.
Adjust position of mask and headgear.
Incorrect air tubing selected. If you are using the SlimLine, Standard or 3 m air tubing ensure
that you have the correct air tubing selected via the menu.
The H5i flip lid is not latched
correctly.
Close the flip lid ensuring that it clicks into place.
The H5i flip lid seal is not fitted
correctly.
Make sure the flip lid seal is facing the right way up and fitted
securely.
Mask vents might be blocked. Check if you have sufficient venting. Unblock mask vents if
necessary.
EPAP may be set too low. Adjust EPAP settings.
There is excessive leak. Adjust position of mask and headgear.
Pressure rises inappropriately
Talking, coughing or breathing in an
unusual manner.
Avoid talking with a nasal mask on, and breathe as normally as
possible.
Mask cushion is buzzing against the
skin.
Adjust the headgear.
Cushion seated incorrectly causing
excessive leak.
Adjust headgear or re-fit cushion.
Displays message:
Heated tube fault, replace tube
Device has been left in a hot
environment.
Allow to cool before re-use. Disconnect the power cord and
then reconnect it to restart the device.
There is a fault in your ClimateLine
or ClimateLine
MAX
heated air tubing.
Discontinue using your ClimateLine or ClimateLine
MAX
heated
air tubing and contact your service provider. Use SlimLine,
Standard or 3 m air tubing in the interim.
Displays message: High temperature fault, refer to user manual
Device has been left in a hot
environment.
Allow to cool before re-use. Disconnect the power cord and
then reconnect it to restart the device.