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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
VPAP III ST-A.
Problem Possible Cause Solution
No display. Power not connected or
switch at back is not on.
Ensure the power cable is
connected and that the
switch at the back of the
device is in the ON position.
Insufficient air
delivered from the
VPAP III ST-A.
Ramp time is in use.
Air filter is dirty.
Wait for air pressure to
build up.
Replace air filter.
Air tubing is kinked or
punctured.
Straighten or replace
tubing.
Air tubing not connected
properly.
Check air tubing.
Mask and headgear not
positioned correctly.
Adjust position of mask and
headgear.
Plug(s) missing from access
port(s) on mask.
Replace plug(s).
Pressure required for
treatment may have
changed.
See your clinician to adjust
the pressure.
The VPAP III ST-A does
not start when you
breathe into the mask
(when SmartStart is
enabled).
Power cord not connected
properly.
Power outlet may be faulty.
The VPAP III ST-A is not
switched on.
Connect power cord firmly
at both ends.
Try another power outlet.
Switch power switch at rear
of the VPAP III ST-A to
on (I).
SmartStart not on. Enable SmartStart.
Mask Alarm has been
enabled; SmartStart has
automatically been
disabled.
Disable Mask Alarm to
enable SmartStart if
appropriate.