DESCRIPTION OF CONTROLS, INDICATORS, ALARMS & CONNECTIONS
3-22 SERHT50NA A0808
The Device Alert Alarm is activated when the microprocessor
detects a functional problem with the ventilator. With the exception
of OCCLUSION & FAULT BAT SYS, all other Device Alert alarms
are non-recoverable and will result in the HT50 discontinuing
ventilation. When this occurs, the ventilator must be powered
down by pressing the On/Standby button. DO NOT use the
ventilator until the cause of the alert has been determined and
corrected.
NOTE: See Pg. 3-17, Occlusion Alarm, Device, and Pg. 3-21,
F
ault Battery System Alarm, for a detailed description of these
recoverable Device Alert Alarms.
There are three possible messages that will be displayed when a
non-recoverable Device Alert Alarm occurs; (1) MOTOR FAULT
(2) 10V SHUTDOWN and (3) SYSTEM ERROR. For MOTOR
FAULT and10V SHUTDOWN the full text message will be
displayed for 5 seconds, followed by an abbreviated form of the
message, eg. MTR Fail, or 10V Fail. A timing message will also
appear, documenting how long the condition has been present.
The format for the time is “H:MM:SS.” The SYSTEM ERROR
message will always be displayed with full text.
NOTE: If the cause of the SYSTEM ERROR does not allow the
HT50 to displa
y the alarm message and the Device Alert indicator
to light, the ventilator will shut down and the Shut Down Alert Alarm
will activate. Upon the next power up of the unit, the SYSTEM
ERROR message will be displayed. If the cause of the alarm has
been corrected, the message can be cancelled by pressing the
Silence/Reset button.
WARNING If a non-recoverable Device Alert alarm occurs,
immediately disconnect the patient from the ventilator and
provide an alternate method of v
entilation.
NOTE: A non-recov
erable Device Alert Alarm cannot be silenced
without first turning the ventilator Off (Standby).
Shut Down Alert Alarm
(automatic)
Audible Alarm: Intermittent beeps
Visual Alarm: –
Message Window: –
The Shut Do
wn Alert Alarm occurs when the ventilator is powered
Off. An intermittent audible alert indicates the ventilator is no longer
operating. The intermittent beeps will continue for at least 10
minutes or until it is silenced by pressing the Silence/Reset button.
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