The System Controller keypad (
Figure 6
) has a Silence Alarm button and a Test
Select button, both of which can be used to interact with the system. Either button
can be pressed and held for two seconds to restart the pump if the System
Controller does not automatically do so (for instance, if the percutaneous lead
and/or power leads are disconnected from the the System Controller and the fixed
speed setting is below 8,000 rpm). These two buttons can also be used to force the
System Controller into backup system operation by pressing both simultaneously
when the pump is off or not connected to the Controller. The Silence Alarm and Test
Select buttons are described in more detail below.
Silence Alarm Button
The Silence Alarm button has two main purposes: to display the battery fuel gauge
and to silence audio alarms. An audio alarm is silenced for two minutes if a hazard
condition or Power Cable Disconnected advisory is active; and, for four hours if
general advisories are active. If the alarm condition resolves within this period, the
alarm will not recur. While the audio alarm is silenced, the respective alarm sym-
bol(s) flash(es) as a reminder that the alarm condition remains active.
When the patient is tethered to the PBU, the PBU repeats (duplicates) a System
Controller audible alarm. This second alarm can be silenced for five minutes using
the Alarm Reset button on the PBU front panel; or, to silence both the Controller
and the PBU, press the Silence Alarm button on the System Controller or System
Monitor screen.
Repeated attempts to prolong the silence period by pushing the Silence Alarm but-
ton will not add time to the silence period.Any new hazard or advisory alarm condi-
tions arising during the four hour silence period will initiate a new visual and audio
alarm. Only a new hazard alarm condition arising during a two minute silence peri-
od will initiate a new audio alarm. Audible advisory alarms will not occur until the
hazard or power cable disconnected alarm has been resolved.
Test Select Button
The Test Select button is used to initiate a system controller self-test. The self-test
CLINICAL OPERATION AND PATIENT MANAGEMENT
12
Test Select
Button
Battery Symbol
(yellow & red)
Battery Fuel Gauge
Power Symbol
(green)
Controller
Battery Module
(yellow)
Red Heart
Symbol
Silence
Alarm
Button
Figure 6
System Controller Keypad
