Washer-dryer combo displays E18; Wi‑Fi or smart app connection fails repeatedly

Safety first: Network troubleshooting does not require opening the appliance; do not remove covers while powered.

• Check signal strength: Use a phone near the Roborock combo to verify strong Wi‑Fi signal. Move the router closer or use a range extender if needed.
• Reset network settings: Follow the user manual to reset the Roborock Wi‑Fi settings on the control panel.
• Reconnect via app: Use the official Roborock app, select the correct model, and follow pairing instructions carefully (2.4 GHz network, correct password).
• Firmware update: If possible, update the appliance firmware through the app. Persistent E18 may indicate a failed Wi‑Fi module that requires replacement by a service center.