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The table below lists some of the problems you may experience with your device and possible solutions to those problems.
Nothing happens when you
apply power to the device. The
backlights on the buttons do
not light.
The airflow does not turn on.
The device's display is erratic.
The Ramp feature does not
work when you press the Ramp
The airflow is much warmer
than usual.
The airflow pressure feels too
high or too low.
User Manual
There's no power at the
outlet or the device is
There may be a problem
with the blower.
The device has been
dropped or mishandled,
or the device is in an area
with high Electromagnetic
Interference (EMI)
Your home care provider
did not prescribe Ramp
for you, or your CPAP
pressure is already set to
the minimum setting.
The air filters may be dirty.
The device may be
operating in direct sunlight
or near a heater.
The Tubing type setting may
be incorrect.
If you are using AC power, check the outlet and verify that the
device is properly plugged in. Make sure there is power available
at the outlet. Make sure the AC power cord is connected
correctly to the power supply and the power supply cord is
securely connected to the device's power inlet. If the problem
continues to occur, contact your home care provider. Return
both the device and power supply to your provider, so they can
determine if the problem is with the device or power supply.
If you are using DC power, make sure your DC power cord and
battery adaptor cable connections are secure. Check your battery.
It may need recharged or replaced. If the problem persists, check
the DC cord's fuse following the instructions supplied with your
DC cord. The fuse may need to be replaced. If the problem still
occurs, contact your home care provider.
Make sure the device is powered correctly. Make sure "Therapy"
is highlighted when pressing the control wheel to start airflow. If
the airflow does not turn on, there may be a problem with your
device. Contact your home care provider for assistance.
Unplug the device. Reapply power to the device. If the problem
continues, relocate the device to an area with lower EMI
emissions (away from electronic equipment such as cellular
phones, cordless phones, computers, TVs, electronic games, hair
dryers, etc.). If the problem still occurs, contact your home care
provider for assistance.
If Ramp has not been prescribed for you, discuss this feature
with your home care provider to see if they will change your
If your provider has enabled Ramp, but the feature still does
not work, check the CPAP setting on your Active Display
screen. If CPAP is set to the minimum setting (4.0 cm H
the starting pressure is the same as the prescribed pressure,
the Ramp feature will not work. Make sure that the ramp time
setting is >0.
Clean or replace the air filters.
The temperature of the air may vary somewhat based on your
room temperature. Make sure that the device is properly
ventilated. Keep the device away from bedding or curtains that
could block the flow of air around the device. Make sure the
device is away from direct sunlight and heating equipment.
If using the humidifier with the device, check the humidifier
settings. Refer to the humidifier instructions to make sure the
humidifier is working properly.
If the problem continues, contact your home care provider.
Make sure the Tubing type setting (22 or 15) matches the tubing
that you are using (Respironics 22 mm tubing, or the optional
Respironics 15 mm tubing).
If you do not see the Tubing type setting in the setup menu, you
must use the Respironics 22 mm tubing.
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   Also See for Philips REMstar Auto A-Flex

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