Welch Allyn Electrosurgical Unit - User Manual - Manual (Page 21)

XII. TROUBLESHOOTING
C. If, following correct set-up of the system, it does not operate, works in an inter-
mittent way, or stops working after a few seconds (without an audible signal),
check for correct connection of pedal and its condition. The pedal is pneumatic,
so even a slight leak can cause a performance problem. Proceed as follows:
1. Tighten the threaded plug into the foot pedal socket.
2. Then, push the pedal hard repeatedly to detect possible breaks in the tub-
ing or in the pedal.
D. If the unit, correctly connected, appears to deliver a lower power output than
usual, check:
1. The dispersive patient plate for complete contact
(refer to dispersive plate sections).
2. The condition of active electrodes (refer to "Practical Suggestions").
3. The condition of the handpiece (cable continuity, contact of the electrode
in the handpiece and the connector) by moving the cable and the connec-
tor and electrode to detect possible breaks and poor contact in the socket
of the system.
E. The Electrosurgical Unit has a thermal protection circuit which will shut the unit
off when internal operating temperatures exceed safe limits. If the unit stop
functioning with no alarm signal, assure that the system has adequate ventila-
tion and that you have not exceeded the recommended duty cycle of 10 / 30
seconds. If the thermal protection circuit is activated under normal operating
conditions, contact Welch Allyn Customer Service at 1-800-535-6663.
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Electrosurgical Unit • Instruction Manual