4-22
Problem
Possible Cause
Display:
[al
The system is in the Calibration Mode. Calibration Mode is selected when the
configuration DIP switch in the second position on the Controller assembly is in
the ON (Up) position and the Remote Power Control Key is pressed and held
while power is turned on. See section 4.9.
Display:
Err
xxx
Refer to Table 4.12 for list of
Err
codes and possible causes. If an
Err
code
appears, try cycling power. If it reappears, the unit should be taken out of service
until a qualified biomedical engineer can diagnose the problem.
Single and Dual Dispersive
Electrode Status / Alarm Indicators
flash alternating red.
A Dispersive Electrode is not connected to the system
A Dual Dispersive Electrode is connected but is not properly applied to patient.
A Dispersive Electrode is connected to the System, but is not properly seated
– ensure the connector is fully seated in the Two-Pin Dispersive Electrode
Receptacle.
Flashing Decimal Points on the
Display
The system is in the Test Mode. Test Mode is selected when the configuration
DIP switch in the first position on the Controller assembly is in the ON (Up)
position and the Remote Power Control Key is pressed and held while power
is turned on. Note: When the Test Mode is active, most of the internal safety
monitoring is inhibited. See section 4.9.
No output power
One or more connections inside the system are bad. Check:
• A6J1, controller
• A6J2, monopolar transformer board
• A6J3, high voltage power supply
• A6J4, bipolar output
• A7J1, controller
• A7J2, monopolar output
• Faulty accessory – blade not seated fully
• Output board jacks not making contact
Low voltage power supplied to A6 is bad. Check:
• +15V
• -15V
• -5V
Shorted RF Amplifier power MOSFET.
Note: A better indication of the problem will be provided by cycling power,
which will allow the generator to find a fault during POST.
• Remove A6 JMP1 and A6 JMP2.
• Using an ohmmeter measure between drain and ground on Q3 and Q4 for
low resistance.
• Using an ohmmeter measure between gate and ground on Q3 and Q4 for
low resistance.
• If either exhibit low resistance, either replace the faulty MOSFET or replace
the RF Amplifier.
HVPS output too low.
• Configure system for test mode operation.
• Unplug the connector A6J3 on the RF Amplifier.
• Set the system for Pure cut at 35 watts.
• Activate and ensure A9LED2 is brightly illuminated.
Improper gate drive.
• Configure system for test mode operation.
• Verify that the input to A6U1 is switching between –5V and 0 volts when
the system is activated, and that this signal is synchronous with crossing transi-
tions of RF_DRV and /RF_DRV.
• Verify that A6 GATE_A and A6 GATE_B are at –5V when not activated.