| A61 | AGC01 control board anomaly (internal error) | The main PCB (AGC01) shows an internal error. Check power supply/grounding and continuity to the electrode; if the issue persists after resetting, replace the PCB. |
| A54 | AGC01 control board anomaly | Internal fault of the PCB; the brand indicates to cut power for 10 seconds and, if it reappears, replace the control board/PCB. Check 230 V and connectors before replacement. |
| A55 | AGC01 control board anomaly | Internal fault of the PCB; try cutting the power for 10 seconds. If the error reappears after checking the wiring/power supply, the PCB is faulty. |
| A63 | AGC01 control board anomaly | Internal fault of the PCB; identical action to A54/A55. If it persists after reset and basic checks, replace the PCB. |
| F66 | Firmware not loaded correctly | The firmware upload on the PCB has not been completed or is corrupted; verify/reload firmware with service tool. If it does not recover, replace the PCB. |
| A98 | Too many SW errors or error appeared due to card replacement | Accumulation of software errors or lock-up after changing the PCB; after resolving combustion causes and calibrating 100%, if it reappears, it indicates defective memory/PCB. Verify by repeating calibration and reset; replace the PCB if necessary. |