Field Actions
DISPATCHAlways disconnect appliance from 230V/400V mains before opening panels. Use CAT III multimeter for circuit testing.
Frequently Asked Questions: Nardi C21
FAQ TREEWhat does error code C21 mean on a Nardi appliance?
Nardi error code C21 indicates: Nardi PVF / PV43 Touch Control Induction & Electronic Flame Gas Cooktop: Operational diagnostic fault code C21 signaled by internal electronics. Cookware pan material unsuitable or resonance frequency out of allowable induction matching range.
What is the root cause of Nardi error code C21?
The primary root cause for Nardi code C21 is: On Nardi kitchen suites engineered with planar induction coils, 100 kΩ surface thermistors, IGBT transistors with fast recovery diodes, 12V fan tachometer, and 230V spark pulse generators: Non-ferromagnetic aluminum, copper or glass cookware, concave/warped base, or base diameter <120mm Multimeter diagnostic parameter: cookware bottom must hold permanent magnet firmly; inductive coil shift must exceed ΔL >15 μH on loading..
How do I fix or resolve Nardi error code C21?
To resolve error code C21: Safely de-energize the appliance at the electrical distribution board. Unplug wiring connector from the affected component and verify with a digital multimeter: verify pan suitability with permanent magnet test and inspect flat surface contact against ceramic glass. Inspect spade lugs for signs of heat discoloration. Replace defective component, restore electrical supply, and perform system reset: Isolate hob at the electrical fuse board for 90 seconds. Restore power and press the ON/OFF key three times within 5 seconds to clear faults.
Is it safe to clear Nardi error code C21 by resetting power?
Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Nardi code C21 persists, the physical component causing On Nardi kitchen suites engineered with planar induction coils, 100 kΩ surface thermistors, IGBT transistors with fast recovery diodes, 12V fan tachometer, and 230V spark pulse generators: Non-ferromagnetic aluminum, copper or glass cookware, concave/warped base, or base diameter <120mm Multimeter diagnostic parameter: cookware bottom must hold permanent magnet firmly; inductive coil shift must exceed ΔL >15 μH on loading. must be inspected or replaced.
How do I test electrical resistance for Nardi code C21 using a multimeter?
Set a digital multimeter to ohms (Ω). Disconnect power and test NTC Temperature Sensor Probe (Thermistor) across Across sensor pins 1-2 (unplugged harness). Expected nominal reading is 4.8kΩ–12kΩ (at 20°C–25°C). Tolerance: Negative temperature coefficient: resistance drops smoothly when warmed with fingers. OL = open circuit..
What safety protocol must be followed before servicing Nardi code C21?
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.
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