Display shows E9 and the refrigerator may not cool; compressor may not start or may run continuously.

Safety first: Unplug the refrigerator. The compressor circuit carries high voltage and can be dangerous.

Step-by-step:

• Check basic operation: After plugging in (for testing only), listen at the back for compressor start attempts (clicking or humming). Then unplug again before touching anything.
• Inspect wiring: Remove the rear lower cover. Look at the compressor terminals and any attached inverter module. Check for burnt connectors or melted insulation.
• Feel compressor (carefully): With power disconnected and after some running time, a very hot compressor may indicate mechanical failure or locked rotor.
• Reset power: Sometimes a power surge can confuse the inverter. Leave unplugged for 10 minutes, then reconnect and observe. If E9 returns quickly, a hardware fault is likely.
• Do not open sealed system: Compressor and refrigerant work require specialized tools and certification.

Action: If wiring is intact and E9 persists, the compressor or inverter/control board likely needs professional diagnosis and replacement.