252 Instructions for use | Atlan A100 (XL), A300 (XL), A350 (XL) SW 2.1n
Troubleshooting
!! 100 Cardiac bypass mode still
active?
A significant minute volume
was measured during car-
diac bypass mode.
Deactivate the cardiac
bypass mode.
Use "ALARM RESET" to
downgrade alarm priority.
! 100 Central Air supply high The central supply pressure
is high. The gas delivery
might fail.
Check central supply.
! 255 Central Air supply low Central supply pressure is
low.
Check central supply.
! 100 Central N
2O supply high The central supply pressure
is high. The gas delivery
might fail.
Check central supply.
! 255 Central N
2O supply low Central supply pressure is
low.
Check central supply.
! 100 Central O
2 supply high The central supply pressure
is high. The gas delivery
might fail.
Check central supply.
!!! 210 Central O
2 supply low Central supply pressure is
low.
Check central O2 supply or
use cylinder.
Use "ALARM RESET" to
downgrade alarm priority.
! 255 Central O
2 supply low Central supply pressure is
low.
Check central supply.
! 100 CO
2 absorber expired Accessory has been used
too long.
Replace the accessory if nec-
essary.
Use "ALARM RESET" to
reset alarm.
!! 255 CO
2 measurement failed There is electromagnetic
interference.
Check for electromagnetic
radiation in the vicinity.
There is an internal failure. Use an alternative gas mea-
surement system.
If the problem persists, call
Dräger.
Use "ALARM RESET" to
downgrade alarm priority.
! 255 CO
2 sensor accuracy low The sensor has not yet
warmed up.
Wait for the automatic cali-
bration.
The ambient air used for cali-
brating the sensor was
impure.
Position the device in an
environment with clean ambi-
ent air.
!! 135 Cooling fan failure An internal fan for evacuating
gases is faulty.
To prevent potential dam-
age, turn off the device at
your earliest convenience.
Increased risk of fire.
Call Dräger.
!! 135 etCO
2 high etCO2 has exceeded the
upper alarm limit.
Check ventilation.
Priority Alarm Cause Remedy
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