Terumo 801763, Operator'S Manual, Page: 287 / 359

Emergency Procedures
10-8
Electronic Gas Blender Failure
Use backup gas blender and oxygen analyzer to mix and monitor the gases.
Sensor Failure
In the event of a sensor failure, the appropriate message will be displayed in the
message area of the CCM. Check the sensor connections and, if the message does
not clear, replace the sensor with the appropriate back up sensor.
Loss of Servo Control
Servo control will be lost if either the flow module, pressure module, or the flow
sensor or pressure transducer providing the data setpoint fails. Servo control will
be lost if the pump cannot maintain the servo setpoint. Loss of servo control will be
accompanied by a message (“MANUAL: monitor flow”) on the pump display. The
message “<Pump Name>: MONITOR FLOW” will appear in the message area of the
CCM. Check the servo source. Once the source is operating properly, try again to
establish servo control via the CCM. If the message appears again, discontinue the
use of servo control.
Remember that there are operating parameters that the user must remain within in
order to establish servo control. See the
Roller Pumps
chapter,
Servo Mode
section
and the Centrifugal Control Unit chapter, Servo Mode section for more information
regarding operating parameters.
Central Control Monitor Malfunctions
Pumps and connected safety devices will function even if the Central Control Monitor
fails. If there is a failure, contact Terumo Cardiovascular Systems Service before
using the system again.
A failure of the Central Control Monitor may be expressed as: a frozen touch screen,
portions of the screen may appear blank, or there may be a message “System
Computer Needs Service” displayed on the screen. If you are not on bypass, cycle
power to reset the computer. If you are on bypass, finish the case with the local
controls on the pumps, centrifugal control unit, and electronic gas blender.
WARNING: If the Central Control Monitor fails, the system can be controlled
through the local controls on the roller pump, centrifugal control unit, and
electronic gas blender, if installed.
WARNING: In the event the Central Control Monitor fails, only those sensors
that have a safety connection to at least 1 roller pump or centrifugal control
unit will be able to display messages on a local control panel. If no safety
connection was established, no audible tone will sound and no messages
will display on any local control panel. The only indication that an event has
occurred will be the flashing LED on the affected module.
WARNING: Do not turn the system power off in the event of a Central Control
Monitor failure during use as this will cause all settings and device assignments
to be lost.
During a case, do not attempt to re-enter the Perfusion Screen. Finish the case
through local control.