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13Troubleshooting
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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.
No display
Insufficient air delivered from the S8 device
Device does not start when you breathe into the mask
Device does not stop when you remove your mask
SmartStart/Stop is enabled but the flow generator does not stop automatically when you
remove your mask
Displays error message: Check tube!! Key if done
Problem/Possible Cause Solution
Power is not connected. Ensure the power cable is connected and the power switch (if
available) is on.
Ramp time is in use. Wait for air pressure to build up or change ramp time.
Air filter is dirty. Replace air filter.
Air tubing is not connected
properly.
Check air tubing.
Mask and headgear are not
positioned correctly.
Adjust position of mask and headgear.
Cushion seated incorrectly
causing excessive leak.
Adjust headgear or re-fit cushion.
Humidifier control dial set too
high, resulting in accumulation of
water in the air tubing.
Turn humidifier control down and empty the water from the air
tubing.
Breath is not deep enough to
trigger SmartStart/Stop.
Take a deep breath in and out through the mask.
There is excessive leak. Adjust position of mask and headgear.
Air tubing not connected properly. Connect firmly at both ends.
SmartStart/Stop is disabled.
Note: SmartStart/Stop is not
available if you are using a Full
Face Mask or if Leak Alert is
enabled.
Enable SmartStart/Stop.
SmartStart/Stop is not enabled.
Note: SmartStart/Stop is not
available if you are using a Full
Face Mask or if Leak Alert is
enabled.
Enable SmartStart/Stop.
Incompatible mask system being
used.
Use only equipment recommended by ResMed.
The air tubing is loose or blocked. Check that the air tubing is connected securely to your mask
and the air outlet. Press the Start/Stop key to restart the
device. If this does not clear the message, disconnect the
power cord and then reconnect it to restart the device.