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35Troubleshooting
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
flow generator.
Problem Possible cause Solution
Insufficient air delivered
from flow generator
Air filter is dirty. Replace air filter.
Air tubing is kinked or
punctured.
Straighten or replace tubing.
Flow generator operating
erratically, ie, switching on
and off, pressure varying at
random
Water may have entered the
air tubing.
Remove the water from the
air tubing.
Pressure rises
inappropriately
You are talking, coughing,
voluntarily breath-holding (eg,
while rolling over in bed), or
intentionally breathing in an
unusual manner.
Avoid talking with the mask
on, and breathe as normally
as possible.
Severe mask leak or mouth
leak (greater than 30 L/min).
Correct your leak condition.
Alarm stays on continuously Blockage in air circuit. Ensure there is no barrier to
the passage of air.
Internal malfunction. Return the device to your
equipment supplier for
service.
No LCD 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
unit is in the “on” position.
FAULT message displayed
on LCD
Internal malfunction. Return the device to your
equipment supplier for
service.
System Error 7 message Device power-on has been
interrupted by breathing into
the mask during warm up.
Turn the flow generator off
and on again. Do not place
mask on face during warm
up (30 seconds). Select
LEARN CIRCUIT (page 22).
If the error is not cleared,
contact your equipment
supplier for service.
Internal malfunction. Return the device to your
equipment supplier for
service.