Alarms and Troubleshooting
3-12
Puritan Bennett 540™ Ventilator User’s Manual
LOW INSP VOLUME
Inspired tidal volume less than
Low VTI set during three
consecutive breaths in
PSV/CPAP, PRES A/C, P SIMV and
V SIMV modes.
Alarm activation occurs:
•
After three consecutive
breaths.
MP
Yes
No
LOW MINUTE
VOLUME
Minute volume lower than Low
Min Vol set during three
consecutive breaths.
Alarm activation occurs:
•
After three consecutive
breaths
MP
Yes
No
LOW PRESSURE
DISCONNECT*
*IF PERSISTS
REPLACE VENT
•
If the flow is greater than
130 lpm during the inspiratory
phase.
or
•
In VOL A/C and V SIMV modes, if
patient pressure is lower than
Low PIP.
or
•
In PSV/CPAP, PRES A/C modes
and P SIMV if patient pressure is
lower than (P S PEEP) -
20% or (P C PEEP) - 20%.
Alarm activation occurs:
If one of these three conditions
remains for more than 15 seconds,
or the maximum time between
15 seconds and Apnea Time + 2
seconds.
HP Yes
No
LOW SPKR/BATTERY
Occurs when the buzzer battery
is too low to sound an alarm
when ventilating using battery
power. Connecting the
ventilator to AC power for 15
minutes should clear the alarm.
MP
Yes
Yes
OCCLUSION CHECK
CIRCUIT*
*IF PERSISTS
REPLACE VENT
Tidal volume measured
negligible during three
consecutive breaths for
PSV/CPAP, PRES A/C and P SIMV
modes.
Alarm activation occurs:
•
After three consecutive
breaths.
HP Yes
No
ON INTERNAL
BATTERY
(with Periodic
Audible Signal)
Cut-off of the external DC power
supply.
Consequence: switch-over to
the internal battery.
MP
Yes
Yes
Table 3-1.
Overview of Alarms (Continued)
Alarm Message
Cause/Ventilator Response
Priority
Audio
Paused
Avail.
Alarm
Paused
Avail.
Содержание Puritan Bennett 540
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