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Display | Indication | Displayed values/adjustment values |
F00 |
Flow-NTC: NTC broken; NTC cable broken; Defective connection at NTC Defective connection at electronics |
Flow-NTC cable defective/ broken NTC faulty |
F01 |
Return NTC: NTC broken; NTC cable broken; Defective connection at NTC Defective connection at electronics |
Return-NTC cable defective/broken NTC faulty |
F10 | Short circuit - flow-NTC (<130°C) | NTC-plug shorted to casing, NTC defective |
F11 | Short circuit - return-NTC (<130°C) | NTC-plug shorted to casing, NTC defective |
F20 | Over heat cut off activated | Maximum temperature exceeded |
F22 | Low water or no water in appliance | No water in system Pump defective Pump lead defective |
F27 | No demand to gas valve | Electronic board defective; Gas valve defective |
F28 | Boiler goes to lock out | No gas; Insufficient gas; Incorrect gas valve adjustment; Electrode defective; Ignition lead defect; Electronic igniter defective |
F29 | Flame extinguished re-ignition unsuccessful | Gas supply absent or insufficient |
F42 | Faulty cable loom | Faulty or incorrect loom fitted |
F43 | Faulty cable loom | Faulty or incorrect loom fitted |
F60 to F67 | Irreversible electronic system malfunction | Electronic system defective |