E9 appears and the cooker shuts down or never starts heating.

Safety first: Unplug the multicooker immediately. Do not attempt to power it on again until the fault is identified. If you smell burning or see smoke, discontinue use permanently until inspected by a professional.

• 1. External inspection: Check the power cord and plug for damage or burn marks. Replace the cord set if any damage is found.
• 2. Inspect internal wiring (advanced): Remove the bottom cover and look for melted insulation, burned connectors, or blackened areas on the PCB or around the heater.
• 3. Check heater for short: With the unit unplugged, disconnect one heater lead and measure resistance from each heater terminal to the metal chassis. Any reading near 0Ω indicates a shorted heater that must be replaced.
• 4. Examine control board: Look for visibly blown components (burned resistors, cracked ICs, bulging capacitors). If present, the board should be replaced rather than repaired at home.

Due to the risk of fire and electric shock, E9-related repairs involving the power supply or control board should generally be handled by a qualified appliance technician or by replacing the entire unit if parts are unavailable.