Rosieres F9

Rosieres error code F9 indicates: Rosières RVI / RPI Piano de Cuisson & Induction Cooktop: Induction coil current sensor calibration failure F9; current transformer sensing circuit fails zero-offset balance test at power up..

The primary root cause for Rosieres code F9 is: On Rosières cooktops utilizing Piano de Cuisson induction generator, heavy-duty electromagnetic coils, and high-temperature thermal safety module: Defective current transformer on power PCB, leaky shunt resistor, or cracked ferrite core on measuring coil..

To resolve error code F9: Turn off breaker for 5 minutes. If code returns upon energization, inspect power board current sensing stage or replace affected generator board. Clear pan from hob surface, turn off electrical isolator for 60 seconds, turn back on and press Key Lock sensor for 5 seconds.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Rosieres code F9 persists, the physical component causing On Rosières cooktops utilizing Piano de Cuisson induction generator, heavy-duty electromagnetic coils, and high-temperature thermal safety module: Defective current transformer on power PCB, leaky shunt resistor, or cracked ferrite core on measuring coil. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test Immersion / Air Heating Element & Klixon Thermostat across Between element terminals (unwired). Insulation to earth casing: >20MΩ (OL). Expected nominal reading is 25Ω–28Ω (230V / 2000W) / <0.5Ω (Safety Klixon closed). Tolerance: Formula R = V²/P (±5%). Any earth leakage reading below 2MΩ will trip the domestic 30mA RCD breaker..

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.