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O
supply pressure high
2
O
supply pressure high
2
PEEP high
PEEP valve inop.
Pressure limited
Pressure meas. inop.
Standby activated
Temperature high
Temperature meas. inop. !!! Temperature sensor faulty.
Temperature sensor ?
Tidal volume high
Tidal volume high
Cause
!!
O
supply pressure too high.
2
!
O
supply pressure too high.
2
O
supply pressure is not required
2
when FiO
= 21 Vol.%.
2
!!! Expiratory system obstructed.
Expiratory resistance is increasing.
Machine faulty.
!!! Internal PEEP valve faulty.
Pmax pressure limit is active.
!
!!! Fluid in expiration valve.
Pressure measurement malfunction.
!!! Evita 4 has been switched to standby.
!!! Breathing gas temperature higher than
40 ºC.
!!! Temperature sensor probe has been
disconnected during operation.
Sensor cable broken.
!!! The upper alarm limit of the applied
inspiratory tidal volume V
exceeded during three consecutive
ventilation strokes.
Leak or disconnection.
The inspiratory tidal volume V
!
exceeded the upper alarm limit.
Leak or disconnection.
Remedy
Make sure pressure is less than 6 bar.
Make sure pressure is less than 6 bar.
Check hose system and expiration valve.
Check bacterial filter.
Replace if necessary.
Call DrägerService.
Call DrägerService.
Check condition of patient,
check pattern of ventilation,
correct setting if necessary.
Replace expiration valve, page 130,
then clean and dry.
Call DrägerService.
Confirm standby with »Alarm Reset« key.
Switch off humidifier.
Fit new temperature sensor,
see page 33.
Reconnect probe.
Fit new temperature sensor.
Check condition of patient,
has been
check pattern of ventilation,
T
correct alarm limit if necessary.
Check that hose system connections are
leakproof.
has
Check condition of patient,
T
check pattern of ventilation,
correct alarm limit if necessary.
Check that hose system connections are
leakproof.
Troubleshooting
133
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