Biasi Parva 24S Fault codes & diagnostics

2 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

System Natural Gas 24 kW Discontinued
Download the Biasi Parva 24S manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Fault codes

All 2 documented codes

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ER + 69

Your boiler has detected an electrical configuration error and cannot operate safely, meaning you will have no heating or hot water until it is reset or repaired.

High DIY-safe £100-280 Shared across the range

What to check first

  1. Locate the selector switch on the front control panel
  2. Turn the dial to the 'R' (Reset) position for five seconds
  3. Turn the dial back to the 'On' position and wait for the boiler to restart

Parts commonly replaced

  • Main Printed Circuit Board (PCB)
  • External Interface Connection
Full explanation for ER + 69
LP

Your boiler has detected that the water pressure is too low, causing it to stop running to prevent damage.

High DIY-safe £0-120 Shared across the range

What to check first

  1. Locate the filling loop (usually a silver flexible hose) underneath your boiler.
  2. Slowly open the small valves on the hose until you hear water flowing.
  3. Watch the pressure gauge and close the valves when the needle reaches between 1.0 and 1.5 bar.

Parts commonly replaced

  • Filling loop
  • Expansion vessel
  • Pressure sensor
Full explanation for LP
Status & diagnostic codes

3 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.

30c Diagnostic Your boiler has likely detected a problem with the temperature sensor or its wiring, meaning it cannot accurately gauge how hot the water is. G20 Diagnostic Your boiler is correctly identified as being supplied by natural gas, which is the standard fuel type for this appliance. Li Status Your boiler has detected that the water inside is getting too hot and has shut down as a safety precaution.