Covidien Puritan Bennett 540, User Manual, Page: 46 / 141

Alarms and Troubleshooting
3-8
Puritan Bennett 540™ Ventilator User’s Manual
CHECK PROXIMAL
LINE1
*IF PERSISTS
REPLACE VENT
1. Loss of signal from the
proximal pressure sensor
Consequence: switch to internal
pressure sensor for the pressure
measurement.
Alarm activation occurs:
•
In the event of signal loss (1):
After one ventilation cycle
or
In the event of signal loss(2) and
after the 17
th
breath cycle:
After 17 seconds for PRES A/C
and VOL A/C modes, or after the
maximum time between 17
seconds and Apnea Time + 4
seconds for CPAP/PSV/ P SIMV,
and V SIMV modes
MP Yes No
CHECK PROXIMAL
LINE2
*IF PERSISTS
REPLACE VENT
Proximal pressure < 0.6 cmH2O
for 100 ms during inspiration
phase of 2nd breath cycle
Ventilator response: Switch to
internal pressure sensor for
pressure measurement.
MP Yes No
CHECK/CHANGE EXH
VALVE2
Abnormally high expired flow
during the inspiratory phase of
three consecutive breaths (in
double-limb setup).
Alarm activation occurs:
After three consecutive breaths.
MP Yes No
CHECK
SETTINGS
Alarm activation occurs:
•
Systematically after software
versions have changed.
•
Loss of memorized
parameters
Consequence:
•
Locking Key disabled
•
Out-of-range settings are
replaced by their default
values
MP Yes Yes
CHK EXH VALV
RESTART VENT*
*IF PERSISTS
REPLACE VENT
•
Faulty pressure valve sensor
signal at ventilation start.
HP Yes Yes
Table 3-1. Overview of Alarms (Continued)
Alarm Message Cause/Ventilator Response Priority
Audio
Paused
Avail.
Alarm
Paused
Avail.