Covidien Valleylab LS10 Service Manual page 69

Situation
System is on, but did not
complete the self-test;
system status indicator
does not achieve system
ready for use status (con-
stant white)
Generator is on and in-
strument is activated, but
system does not deliver
energy
Incomplete seal
alert front panel will illu-
minate with a solid am-
ber light, a four-pulse
tone sounds, and RF out-
put is disabled
Valleylab LS10, LS Series Single Channel Vessel Sealing Generator Service Manual
Possible Cause
Software malfunction
Internal component mal-
function
Malfunctioning footswitch
or handswitching instru-
ment
Internal component mal-
function
cycle Excessive tissue/eschar on
jaws
Electrodes have come loose
from the instrument jaws
Electrode pins may have
been compromised or bent
during assembly of the in-
strument and may need to
be replaced
Metal or other foreign ob-
ject is grasped within jaws
Tissue grasped within jaws
is too thin
Pooled fluids around instru-
ment tip
Correcting Malfunctions
Solution
Turn off, then turn on the
generator.
Use a backup generator.
Contact the biomedical-en-
gineering department or a
Covidien Technical Service
representative for assis-
tance.
Check and reconnect in-
strument and/or footswitch
connection.
Power cycle the generator.
Replace the instrument if it
continues to malfunction.
Use a backup generator.
Contact the biomedical en-
gineering department or a
Covidien Technical Service
representative for assis-
tance.
Clean jaws with a wet
gauze pad.
Re-insert the electrode into
the instrument jaws making
sure that all the electrode
pins are firmly seated. If not
resolved, replace the LigaS-
ure instrument.
Avoid grasping objects,
such as staples, clips, or en-
capsulated sutures in the
jaws of the instrument.
Open the jaws and confirm
that a sufficient amount of
tissue is inside the jaws. If
necessary, increase the
amount of tissue and re-
peat the procedure.
Minimize or remove excess
fluids.
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