Correcting Malfunctions
Troubleshooting
LigaSure Vessel Sealing Generator Service Manual 7-5
Correcting Malfunctions
If a solution to an observed problem is not readily apparent, use the following
table to help identify and correct specific malfunctions. After taking action to
correct the malfunction, verify that the generator completes the self-test as
described in Chapter 6, Setting Up the Generator.
NOTE: If you find one or more loose connections, try to reseat the connector. If
you find shorts in a component, replace the component.
Situation Possible Cause Recommended Action
Generator does not
respond when turned
on.
Disconnected power cord,
faulty wall receptacle, or faulty
power cord
Check power cord connections (generator and wall
receptacle). Connect the power cord to a functional wall
receptacle. If necessary, replace the power cord.
Loose or disconnected
internal cables
Check all internal connections.
Fuse drawer is open or fuses
are blown
Close the fuse drawer. If necessary, replace the fuse(s).
For instructions, refer to Chapter 8, Fuses.
If a problem persists, check the low voltage power supply.
Faulty power entry module or
connections
Check the power entry module and its cable connections.
Faulty low voltage power
supply
Check the low voltage power supply.
Replace a faulty supply.
Damaged control board
connectors, malfunctioning
control board, or both
Remove the control board and inspect the connectors to
the RF board and to the display board for damage, poor
seating, etc.
If the problem persists, replace the control board. For
instructions, refer to Chapter 8, Control Board and
Battery.
Faulty power switch Replace the power switch. For instructions, refer to
Chapter 8, Power Switch.
Malfunctioning front panel
components
Replace the front panel assembly. For instructions, refer
to Chapter 8, Front Panel and Display Board.
Shorts or disconnects on HV
power supply
Check the HV power supply for shorts or disconnects.
Shorts or disconnects on the
RF board
Check the RF board for shorts or disconnects.
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