Puritan Bennett™ 840 Ventilator User's Pocket Guide - Covidien

Pressing ALARM RESET cancels alarm silence if active (this
avoids silencing an alarm condition that arises shortly after
pressing ALARM RESET). Pressing ALARM RESET clears
any high-urgency alarm that has autoreset (and the steadily
lit high-urgency alarm indicator turns off).
ALARM RESET gives you a way to return the ventilator to
normal operation if an alarm condition has been resolved,
without waiting for alarm detection algorithms to reset
the alarm.
alarm log
To view the alarm log, touch the ALARM LOG button on the
upper screen. The alarm log shows alarm events (including
time-and-date-stamped alarms, silences and resets) in order
of occurrence, with the most recent event at the top of the list
(see Figure 12). The alarm log can store up to 80 of the most
recent entries. Completing a new patient setup clears the
alarm log.
A question mark in a triangle appears on the ALARM LOG
button if the log includes an event that hasn’t been viewed
yet. The question mark in a triangle disappears after you’ve
viewed the event.
To scroll through the alarm log, move the scroll box up or
down and turn the knob to page through the alarm log.
An icon shows your relative position in the log.
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Puritan Bennett 840 Ventilator Pocket Guide