ConMed 7550 - Monitoring Microcontroller Failure Codes and Troubleshooting Tips

B-3
Err Reason Probable Problems Suggested Solutions
218 Bad EPROM CRC EPROM failed (U1) (A5). Reset System - replace U1 if problem
reoccurs.
219 CPU RAM Failed Micro Internal RAM failed (U15)(A5). Reset System - Replace U15 if problem
reoccurs.
220 CPU Failed Microprocessor Failed (U15)(A5). Reset System - Replace U15 if problem
reoccurs.
233 Data transfer to Monitor
failed.
Mailbox Failed (A5). Reset System - Note error code if it reoc
-
curs.
Data Bus bad (A5).
Address Bus bad (A5).
251 EEPROM error fails to
R/W
Bad EEPROM or U27 (A5). Reset System - replace U27 or U37 if
problem reoccurs.
252 EEPROM error CRC error (A5). Recalibrate - See Calibration Section
(only the section for ABC at 11 & 149;
spray at 49, and A.R.M. open circuit).
Bad data stored (A5).
386 Tone Fault Monitor did not detect a tone on signal
T_MON (A5).
Verify tone occurs.
Controller did not send a signal on
Tone_A (A5).
Signals Tone_A, Tone_B, & T_Mon
should all have same frequency.
391 Interrupt External 0 interrupt (A5). Reset System - Note Error code if it
reoccurs.
392 Interrupt External 1 interrupt (A5). Reset System - Note Error code if it
reoccurs.
394 Interrupt A/D interrupt (A5). Reset System - Note Error code if it
reoccurs.
395 Interrupt A/D timer failed (A5). A/D is within micro U15.
Monitoring Microcontroller Failure Codes and Troubleshooting Tips
Err Reason Probable Problems Suggested Solutions
301 Flow Error Flow too high or low. Recalibrate (See flow in calibration sec-
tion).
Flow Rate too high for accessory. Correct the setting/mode if accessory is the
problem.
D/A Failed - V
GAS (A5). VGAS range should be .5V - 6V.
302 IMEA Error Output Current Error too high (A4). Recalibrate (See Power Calibration sec-
tion).
Too much power into a heavy load. Test if problem only occurs into a heavy
load (R<300 ohms)
Power Regulation Loop (A4) Failed. Test if problem in Cut, Pinpoint and/or
Bipolar.
D/A Failed - P
CON (A5). PCON range 0-9V (A4, A5)
303 Activation Error Controller & Monitor Micro-control-
lers disagree on activation request or
the mode requested.
Swap U16 & U33: A different error code
will occur if the problem is one of these
devices.
U16 or U33 (A5) failed.