Air
Life
®
nCPAP Driver Service Manual
2008, Cardinal Health
Page 74 of 81
Warning Screen
Description
Possible Fault
Suggested Action
Indicates that a non-fatal
software fault has been
detected by the device
Software fault or
detection of a fault
condition based on
watchdog criteria that
would not adversely
affect the operation of
the device
Note the displayed code
and select the “accept” to
return to the patient
treatment screen. When
able, remove device from
the patient and cycle power
to the device.
Remove device from
service and perform PM
service to inlet filter
screens, air inlet filter bowl
media, and O
2
sensor filters
Insufficient bleed flow
(<0.9 lpm at 50 psig)
Service or replace the
Manifold Assembly
Indicates that the O
2
sensor calibration criteria
were not met during the
routine/ automatic O
2
Sensor drift check/
calibration. The device will
continue to deliver the
CPAP therapy while this
alarm is active using the
previous calibration points
Faulty O
2
sensor or
excessive sensor drift
Service or replace the O
2
sensor assembly
Oxygen source has
become disconnected,
tank has run out, or the
hose/ fittings are
leaking excessively
Follow on-screen
commands and reconnect
oxygen source, replace
tank, or fix leak. The driver
will automatically resume
oxygen blending to the
original FiO
2
setting when
the O
2
source has been
replenished or the leak is
resolved.
Clogged inlet filter
screen
Remove from service and
perform PM service to inlet
filter screens
Indicates that the Oxygen
source pressure has
dropped below the
specified minimum of 41
psig. User may opt to
remove the device from
service or select AIR
ONLY mode (FiO
2
will go
to 21%)
Faulty inlet pressure
sensor
Remove device from
service and service/repair
the Manifold Assembly
Oxygen source
pressure exceeds the
maximum specified
Fix Oxygen source
pressure and/or regulate
the inlet pressure between
41 – 66 psig
Indicates that the Oxygen
source pressure has
exceeded the specified
maximum of 66 psig. User
may opt to remove the
device from service or
select AIR ONLY mode
(FiO
2
will go to 21%)
Faulty inlet pressure
sensor
Remove device from
service and service/repair
the Manifold Assembly
