Welch Allyn Acuity and Mobile Acuity LT Central Monitoring Systems - User Manual - Manual (Page 155)

Directions for use Chapter 10 Troubleshooting and maintenance 151
Troubleshooting
Central station displays
WARNING Replace central station hardware within the the lesser of 3 years or
the original equipment manufacturer’s specification. Failure to perform
preventative maintenance can impact system performance and availability.
Table 10. Troubleshooting the central station display
Problem Explanation
One or more of the Acuity Central
Station screens are blank or frozen, or
some Virtual Monitors have changed
color or disappeared As a preventative measure, the Acuity Central Station monitors its central
processing unit (CPU) software performance levels. If it detects that the
software is not performing at desired levels, it restarts (auto-reboots) in a
controlled sequence, to return the software to normal operation.
Paired Acuity Systems include a second, high-availability (HA) CPU for back-up
monitoring in the case of monitoring interruption. If one CPU of an HA pair
ceases operation, the other CPU assumes control of the Acuity Central Station
display(s). A yellow indicator on a display shows that an HA CPU “switchover”
has occurred, and the display is receiving input from the HA CPU (for details,
see page 13 ).
In both cases, on the Acuity Central Station display(s), typically some virtual
patient monitors re-appear quickly and the rest appear one-by-one over the
next one to three minutes. Some Virtual Monitors may take approximately five
minutes to re-appear.
To respond to an HA CPU switchover
1. If a Virtual Monitor appears in a new yellow alert state, take these steps to
return it to the green state:
(a) Read the message to confirm the patient identity.
(b) Click the appropriate button.
WARNING. If normal central processing unit (CPU) operation is
interrupted (for example, during CPU maintenance, scheduled and
unscheduled reboots, power loss or a high-availability (HA) CPU
switchover period), central station monitoring and analysis
temporarily stop.
The Acuity System cannot collect patient review data during the
interruption period. That data becomes permanently unavailable.
Auto-reboots and HA CPU switchovers occur infrequently, but poor
environmental conditions and failure to perform preventative
maintenance can increase frequency of occurrence.
Whenever an interruption in Acuity System CPU operation occurs,
please contact Welch Allyn Technical Service soon to ensure that your
entire system has returned to normal operating condition and that it
does not require further service.