ResMed VPAP II User Manual page 23

Problem
Mask Alarm is enabled,
but alarm does not
activate when the mask
is removed during
treatment
Flow generator delivers a
single pressure instead of
alternating between the
two set pressures (and
pressure indicator
displays a constant level)
Insufficient air flow
delivered from the flow
generator
20
Possible cause
(continued from previous page)
Humidifier used but the Humidifier
option has not been selected (
does not appear on the LCD screen)
Incompatible humidifier or mask
system being used
Flow generator incorrectly calibrated
Incompatible humidifier or mask
system being used
Humidifier used but
Humidifier option has not been
selected ( does not appear on the
LCD screen)
Rapid breathing and a room
temperature above 35°C (95°F) have
caused the motor to overheat
Blocked air filter has caused
overheating
Blocked air inlet
Delay Timer is in use
Air filter strips are dirty
Air tubing is kinked or punctured
Air tubing is not connected properly
Plugs missing from the mask ports
Solution
Ask your clinician to activate the
Humidifier option
Use only equipment recommended
and supplied by ResMed
Return to supplier for calibration
Use only equipment recommended
and supplied by ResMed
Ask your clinician to enable the
Humidifier option
•If you are comfortable with the
constant pressure, let it run. The
motor will cool down after about 15
minutes and resume normal
operation
•If the single pressure is
uncomfortable, stop the unit by
pressing the Start/Stop button and
allow it to cool. You may resume
normal operation when cool
•Cool the room if possible, but do
not direct the source of cold air
toward the flow generator
Remove blockage
Remove blockage
Wait for air pressure to build up
gradually, or press the Start/Stop
button to start immediately
Replace air filter strips
Straighten or replace air tubing
Check and tighten both ends of the
air tubing
Replace plugs