Troubleshooting
192 Instructions for use Perseus A500 SW 2.0n
! 255 Agent measurement tem-
porarily inaccurate
The sensor has not yet
warmed up.
Wait for the automatic calibra-
tion.
The ambient air used for cali-
brating the sensor was
impure.
Position the device in an envi-
ronment with clean ambient
air.
Wait for the automatic calibra-
tion.
! 220 Air cylinder almost empty The cylinder is almost empty. Replace the cylinder. Use the
central supply.
! 255 Air cylinder empty The cylinder is empty or
closed.
Replace the cylinder. Use the
central supply.
! 190 Air cylinder sensor? Cylinder pressure sensor is
not connected.
Check if cylinder pressure
sensor is connected.
Use "ALARM RESET" to
acknowledge alarm.
!! 150 Air FG flow measurement
failed
The measurement system for
the Air fresh-gas flow has
failed.
Only use O
2 as fresh gas.
Use the total flow tube to
check the fresh-gas flow.
Adjust the fresh-gas flow so
that it equals or exceeds the
minute volume.
!!! 110 Air supply low Central supply pressure and
cylinder pressure are low.
Check central Air supply or
use cylinder.
Use "ALARM RESET" to
downgrade alarm priority.
!!! 255 Airway press. continuously
high
Airway pressure has been
continuously high.
Check ventilation settings.
Check breathing hoses,
breathing system, and anes-
thetic gas scavenging sys-
tem.
In Man/Spon mode, check the
APL valve setting.
Check lower alarm limit for
airway pressure.
!!! 255 Airway pressure high The upper alarm limit for the
airway pressure has been
exceeded. The applied inspi-
ratory pressure is higher than
the set value.
Check patient condition.
Check ventilation settings.
Check alarm limit.
Breathing hoses are blocked
or the tube is kinked.
Check breathing circuit and
tube.
Priority Alarm Cause Remedy
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