E9
Xiaomi
Internal communication error between display board and main control board
Display shows E9 and the unit may shut off unexpectedly during cooking.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Loose ribbon cable between UI board and main PCB,Corroded connector contacts,Faulty touch/display PCB,Main control board communication IC failure
How to Fix / Troubleshooting
Safety first: Unplug the air fryer before opening the housing.
Inspection steps:
- Access the control panel: Remove the front bezel or top cover (depending on model) to expose the touch/display PCB and its ribbon cable to the main board.
- Check ribbon cable seating: Ensure the flat cable is fully inserted and locked in its connector at both ends. Gently release and reinsert it to improve contact.
- Inspect for damage: Look for kinks, tears, or burn marks on the ribbon cable. Check the display PCB for signs of liquid ingress or corrosion.
- Clean connectors: Use a soft brush or compressed air to remove dust. If corrosion is present, lightly clean with isopropyl alcohol and allow to dry completely.
Corrective actions:
- Replace the ribbon cable if it is physically damaged.
- If E9 persists, substitute the touch/display PCB if available.
- If a new UI board does not resolve the issue, the main control board communication circuitry is likely faulty and the board should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Touch/Display Control PCB
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