191061526 Rev. CVULCAN™ Generator Operations/Service Manual
Troubleshooting (continued)
Type Message Condition Possible Remedy
Alarm
OPEN TC- RF disabled
in Temp Control mode
(Note: “OPEN TC” refers to an
open thermocouple circuit.)
RF output is not allowed in
the Temperature Control
Mode unless a valid
temperature measurement
is returned from the probe’s
temperature sensor.
• Check probe connection to
generator control unit.
• Replace probe.
Alarm
Cannot use CUT pedal
in Temp Control mode
RF output is disabled in the
Temperature Control Mode
if the yellow CUT footswitch
is pressed.
Use COAG pedal.
Alarm
RF Disabled - Check
Return Electrode
RF output is disabled in
any monopolar mode if
the impedance between
the electrodes on the
split grounding pad is
greater than the calculated
threshold.
Check that the return
electrode is properly applied
to the patient and that the
cable is properly connected to
the generator control unit.
Alarm
LOW LOAD IMPEDANCE-
Output power reduced
RF output is reduced to
below 5 watts whenever the
measured load impedance
is less than 40 ohms (or
20 ohms depending on the
probe).
Keep active electrode away
from metallic surfaces during
use.
Alarm
NEM CIRCUIT SHORTED-
Use split-pad return
If the impedance calculated
during NEM initialization is
less than 5 ohms, the unit
indicates a NEM contact
failure.
• Check that split grounding
pad is being used.
• Check that the split
grounding pad is properly
applied to the patient and
that the pad is properly
connected to the front of
the control unit.
• To test for proper operation
of the NEM circuitry, unplug
the neutral electrode and
connect a 100 ohm, non-
inductive resistor across
the two pins of the neutral
electrode connector. The
impedance should be
sufficiently high to clear
the alarm. If the alarm
persists, contact Smith &
Nephew.*
*Call Smith & Nephew Technical Support at 1-800-343-5717 in the U.S., or your local Smith & Nephew representative.
Alarm and Fault Messages (continued)
To Next Page
Loading...
