Pressure
permanently
low
High priority
The valve control tube
between the device and
the patient valve is
incorrectly connected
Check valve control tube for
damage, replace patient
circuit if necessary
Connect valve control tube
Device defective Have device repaired
Implausible ventilation
settings
Have settings checked by the
doctor supervising treatment
Permanent large leak
Check patient circuit and
patient/ventilator interfaces
and change if necessary
Filter dirty Clean/change filter
VT
permanently low
High priority
Permanent large leak
Check patient circuit and
patient/ventilator interfaces
and change if necessary
Device defective Have device repaired
EPAP
high
High priority
The pressure drop on
exhalation is inadequate
(possible cause: pressure
drop at patient valve too
slow)
Ensure that the exhaled air
can escape freely at the
patient valve
Check tube system
Continuous pressure
High priority Device defective
Disconnect device from power
supply and switch off. Check
connections for tubes. Restore
power connection and
perform function check. If the
fault continues to occur, have
device repaired
Control voltage
failure
Medium priority
RS485 incorrectly
connected
Only use converter cable USB-
RS485 WM 93318 or
converter box WM 93316
Internal fault Have device repaired
Device start error
High priority
Parameters could not be
loaded
Have device repaired
High priority
Device switches off.
Blower does not switch
back on after power
failure
Display Alarm Cause of fault Remedy