| A61 | Control board anomaly: internal error of the ABM03 electronic control board (the PCB itself). | The ABM03 PCB detects an internal fault in its microprocessor/electronics; the brand's guide indicates checking the grounding and REPLACING the control board if the issue persists. Verify: after checking the grounding connection, if the fault code remains, the cause is the PCB. |
| A63 | Control board anomaly: internal error of the ABM03 control board (the PCB). | Internal fault of the ABM03 control electronics; the official manual indicates checking the earth and replacing the control board if necessary. Verify: once the earth is checked, the persistence of A63 points directly to the PCB. |
| A64 | Control board anomaly: internal error of the ABM03 control board (the PCB). | Same family as A61/A63: internal fault of the ABM03 PCB; documented remedy = check earth and replace control board. Verify: if earth is ruled out, the code confirms PCB fault. |
| A65 | Control board anomaly: internal error of the ABM03 control board (the PCB). | Internal control electronics error ABM03; the official solution is to check the earth and replace the control board. Verify: persistence after checking earth/connection = defective PCB. |
| A02 | Flame signal present with the burner off. | Among the documented causes, the 'control board anomaly' (PCB) is expressly mentioned, in addition to the ionisation electrode; the electronics read non-existent flame. Verify: check the wiring of the ionisation electrode; if the wiring/electrode are correct, the cause is the PCB. |
| A62 | There is no communication between the control board (PCB) and the gas valve. | The ABM03 PCB fails to communicate with the gas valve: causes = control board not connected/control side faulty, or damaged valve. Verify: check the control board-valve wiring; if the valve and connections are ruled out, the communication fault lies with the PCB. |
