Cosman G4 - Troubleshooting; Common Problems and Solutions

Cosman G4 Radiofrequency Generator Service Manual (SPI 11291 Rev A)
Section 11
11. Troubleshooting
Problem Possible Cause
Generator will not turn on by Mains Power
switch
• Bad AC outlet
• Defective power cord
• Blown fuses
No response when button is pressed
• Button has no function in current
operating mode, e.g. Start button only
functional on Stimulation, Thermal RF,
and Pulsed RF screens
• Button stuck in depressed possible (Error
message & alarm will sound)
• Button is broken
No response when Touch Screen is
pressed
• Touch Screen is not calibrated (See
Section 5 & 5.2)
• Region of screen contains a “disabled”
(grayed-out) button or no button
• Touch screen is broken
• System software error
Short Circuit Error
• Electrode in contact with reference
structure, such as ground pad
• Bipolar electrodes in contact with each
other
• No electrode output
• No Impedance Reading (“--- ”)
• Open Circuit Error
• No ground connection
• Problem with electrode
• Break on electrode cable
• No Temperature Reading (“-- °C”)
• No Temperature Error
• Problem with electrode
• Break on electrode cable
Voltage or Current does not increase
automatically when electrode output is
turned on
• Auto Ramp setting is “Off” (see Sections
8.1.2, 8.2.2 & 8.3.2 for Graphing
interface; 9.1.2, 9.2.2 & 9.2.4 for One
Touch interface)
Stimulation, Thermal RF, or Pulsed RF
output will not turn on
• Output Control Knob not in minimum
position
• Open or Short Circuit Impedance reading
• No Temperature on electrode or
• Temperature below 10 °C
• Temperature above 100 °C, Set Temp, or
Max Temp setting.
• Electrodes attached to generator do not
match Electrode Setup
Stimulation, Thermal RF, or Pulsed RF
• Open or Short Circuit Impedance reading