ConMed 7550 - Additional Troubleshooting Tips (Non-Error Code Related

B-5
Err Reason Probable Problems Suggested Solutions
323 FB Amp Drive Error • U7 (A4) Failed.
• U14A on (A4) Failed.
• U21 - Port A (ConD0..D7) on (A4
& A5) wrong data.
• COND0..D7: CT-39H, Pinpoint - 6Fh.
• FBMON (A4): Ct: 2.85V, Pinpoint .35V.
324 FB Amp not inhibited RFINH Failed during POST (A5, A4). During POST - RFINH should go high
two times (A4, A5).
325 Gas Flow not inhibited GASEN failed to turn off the solenoid
valve during POST (A1, A5, A6).
During POST - GASEN is low when
AR_EN is high.
326 Gas Flow not inhibited
by Controller
Monitor Microcontroller detected
FMON > 150mV during POST.
FMON to be <150mV when GASEN is
high - proportioning valve may be on due
to shorted driver.
327 SE Amp not in range RF Drive for SE Amp failed- PWMEA
not within limits during POST.
Recalibrate (See Power Calibration sec-
tion).
Recalibrate EEPROM (See EEPROM
Calibration Section).
ConD0..D7: Spray: 85h ABC: C5h.
PCON range 0-9V (A4, A5).
328 SE Amp not inhibited by
Monitor
RFINH failed to terminate RF Drive
during POST.
RFINH signal failed (A4, A5).
329 ABC Over Voltage Test
failed
ABC Over Voltage Circuit Failed dur
-
ing POST.
U16 (A4) failed to terminate RF Drive.
330 ABC Over Voltage Test
failed
ABC Over Voltage Circuit Failed dur
-
ing POST.
PWMEA failed to activate - (A4).
331 HV out of range HVDC too high during POST. HVDC control circuit (A1).
HVDC monitor circuit [HVMON] (A1).
Triac Failure (A7).
332 HV not inhibited by
monitor
HVINH failed to inhibit HVDC dur
-
ing POST.
HVINH failed (A1, A5)
Fuse on HV Power Supply open/missing.
Additional Troubleshooting Tips (Non-Error Code Related)
Problem Probable Cause Suggested Solutions
No Activation or Tone Activation agreement error between
Controller and Monitor.
Swap U16 & U33 (A5) - An Err 307 or
303 occurs if U33 is bad.
Handsense Circuit failed. Troubleshoot Request inputs on A5.
Handcontrol Requests - active low;
Footcontrol Requests - active high (A5)
RF Jack worn out. Test all handcontrols & footcontrols to
isolate down to a component or mode.
Half Power in Cut, Blend,
Pinpoint, Bipolar
A phase of the Full Bridge Amp failed. Troubleshoot for an open FET.
Open power FET or no RF Drive to
power FET.
Test for RF Drive at the gate (12 ohm
resistor) of each FET.
No power in Spray or ABC Open power FET or no RF Drive on
SE Amp.
Troubleshoot for an open FET.
Test for RF Drive at the gate (12 ohm
resistor) of each FET.