Measurement:
Select appropriate error code:
| CODE / | FAULT DESCRIPTION | CODE / | FAULT DESCRIPTION |
| F.0 | FLOW SENSOR | F.61 | GAS VALVE DEFECTIVE |
| F.10 | FLOW SENSOR | F.62 | GAS VALVE SHUT OFF DELAY |
| F.1 | RETURN SENSOR | F.63 | EPROM ERROR |
| F.11 | RETURN SENSOR | F.64 | SENSOR FAULT FLOW & RETURN |
| F.13 | WARM START SENSOR | F.65 | ELECTRONICS TEMPERATURE |
| F.20 | TEMPERATURE LIMITER | F.67 | FLAME DETECTOR INPUT |
| F.22 | DRY FIRE | F.70 | NO VALID DSN |
| F.23 | TEMPERATURE DIFF TOO HIGH | F.71 | FLOW NTC CONSTANT VALUE |
| F.24 | TEMPERATURE RISE TOO QUICK | F.72 | FLOW OR RETURN NTC FAULT |
| F.25 | THERMAL MODULE FAULT | F.73 | WATER PRESSURE SENSOR SIGNAL LOW |
| F.27 | FLAME DETECTION | F.74 | WATER PRESSURE SENSOR SIGNAL HIGH |
| F.28 | IGNITION FAILURE | F.75 | NO PRESSURE RISE DETECTED |
| F.29 | FLAME GOES OFF | F.76 | OVERHEATING PROTECTION |
| F.32 | FAN SPEED VARIATION | F.77 | CONDENSATE PUMP DEFECTIVE |
| F.49 | eBUS UNDER VOLTAGE | CON | NO COM TO MAIN PCB |
