Correcting Malfunctions
Troubleshooting
LigaSure Vessel Sealing Generator Service Manual 7-9
Footswitch will not
activate output.
Malfunctioning or damaged
footswitch receptacle
Replace the footswitch board. For instructions, refer to
Chapter 8, Footswitch Board.
Footswitch activation signal
lost on control board
Replace the control board. For instructions, refer to
Chapter 8, Control Board and Battery.
Wrong footswitch type (vessel
sealing or bipolar) plugged
into footswitch receptacle
Check the color code on the receptacle. Verify that the
correct footswitch type is connected.
Invalid smart code Check the smart lamp display color. If it is red, re-insert
the instrument cable plug and verify proper seating.
If the lamp remains red, replace the instrument cable and
assembly.
If the lamp remains red, replace the front panel. For
instructions, refer to Chapter 8, Front Panel and Display
Board.
Continuous monitor
interference.
Faulty chassis-to-ground
connections
Check and correct the chassis-to-ground connections for
the monitor and, if applicable, for the generator.
Check other electrical equipment in the room for defective
grounds.
Electrical equipment
grounding connects to
different objects rather than a
common ground. The
generator may respond to the
resulting voltage differences
between grounded objects
Plug all electrical equipment into line power at the same
location.
Malfunctioning monitor Replace the monitor.
Interference with other
devices only when you
activate the generator.
Metal-to-metal sparking Check all connections to the generator and accessories.
Electrically inconsistent
ground wires in the operating
room
Verify that all ground wires are as short as possible and
go to the same protective earth grounding source.
If interference continues when
the generator is activated, the
monitor is responding to
radiated frequencies
Check with the manufacturer of the monitor.
Some manufacturers offer RF choke filters for use in
monitor leads. The filters reduce interference from
activated generators and minimize the potential for an
electrosurgical burn at the site of the monitor electrode.
Situation Possible Cause Recommended Action
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