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Puritan Bennett 540™ Ventilator User’s Manual
3-1
3 Alarms and Troubleshooting
The alarms or faults generated by your Puritan Bennett 540™ Ventilator are classified into
two categories:
•
Ventilation (or utilization) alarms
•
Technical faults
Some of the ventilator alarms are adjustable, depending on ventilation modes (refer to
chapter
3, “Operating Parameters” ). Automatic, unadjustable alarms also exist to create a safety net
for safe patient ventilation.
Alarms indicate events likely to affect the ventilation in the short term and necessitate rapid
intervention (refer to section
3.8, “Troubleshooting,” on page 3-14 ).
Technical faults do not directly affect machine operation. Therefore, the user is not alerted to technical
faults. Only authorized and trained technicians may consult the maintenance menu (refer to the
Puritan Bennett 540™ Service Manual).
Note:
Default alarm setting preferences should be entered prior to using the ventilator.
3.1 Alarm Level of Priority
The alarm hierarchy for signaling the level of alarm criticality is listed below.
•
Very High Priority (VHP): Immediate critical situation; ventilation is impossible:
Continuous Sound Signaling / With or Without Continuous Red LED Illumination / With or
Without Message / With or Without Display Lighting (it is possible for an alarm condition to
occur that may not have
both a message and lighting).
•
High Priority (HP): Critical situation in the short term; ventilation is potentially
compromised:
High Frequency Sound Signaling / Flashing Red LED Illumination / With Message / With
Display Lighting
•
Medium Priority (MP): Critical situation in the long term; ventilation is not affected in the
short term:
Medium Frequency Sound Signaling / Flashing Yellow LED Illumination / With Message / With
Display Lighting
Note:
There are currently no Low Priority (LP) Alarms.
WARNING
Setting Alarm limits to extreme values can cause the ventilator alarms to malfunction.