8 Alarms
LM
T 6
85
41
a 0
6/2
02
1
EN
|
35
Minute volume high
455
Maximum minute volume exceeded.
Check therapy and alarm settings.
Minute volume low
454
Minimum minute volume undershot.
Check therapy and alarm settings.
Pulse high
493
Ventilation parameter settings not
suitable (upper alarm setting for patient
pulse frequency exceeded).
Check therapy and alarm settings.
Alarm settings implausible
Pulse low
492
Alarm settings implausible (lower alarm
setting for patient’s pulse frequency
undershot).
Check therapy and alarm settings.
SpO
2
high
491
Upper alarm setting for patient's oxygen
saturation exceeded.
Check therapy and alarm settings.
SpO
2
low
490
Patient/ventilator interface faulty or
defective.
Check patient/ventilator interface and replace if
necessary.
Oxygen input faulty or inadequate.
Check therapy and alarm settings.
Ventilation parameter settings not
suitable.
Alarm settings implausible (lower alarm
setting for patient’s oxygen saturation
undershot).
Tidal volume low
450
Leak in circuit.
Find and eliminate leak. If necessary: Replace
circuit.
Leak in pneumatic unit (oxygen sensor
or exhalation module).
Check oxygen sensor or exhalation module and fit
correctly.
Perform circuit test
Patient breathing as well.
Check therapy settings.
Filter dirty.
Clean/change filter.
Patient/ventilator interface leaking.
Adjust headgear/headband so that the patient/
ventilator interface seals.
Patient/ventilator interface defective.
Replace patient/ventilator interface.
Settings implausible (lower alarm setting
for tidal volume undershot).
Check therapy and alarm settings.
Minimum volume is not reached within
the specified time in MPVv mode.
Check therapy and alarm settings.
Tidal volume high
451
Patient breathing as well.
Check therapy settings.
FiO
2
low
494
Oxygen flow set too low.
Check whether the prescribed oxygen flow is set
correctly at the oxygen source. Check settings.
Leak
Find and eliminate leak.
Oxygen supply interrupted.
Check oxygen supply and connections.
Oxygen sensor incorrectly calibrated.
Calibrate oxygen sensor.
FiO
2
high
495
Oxygen input too high due to
incorrectly-set oxygen flow.
Check whether the prescribed oxygen flow is set
correctly at the oxygen source. Check settings.
Oxygen sensor incorrectly calibrated.
Calibrate oxygen sensor.
DISPLAY
CODE
CAUSE
ACTION
Summary of Contents for LUISA
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