E9 error, unit powers but no functions respond correctly, random beeping or frozen display.

Safety first: Disconnect the ice maker from mains power before opening the control panel or PCB compartment.

• Perform a hard reset: Unplug the unit for at least 15 minutes to allow capacitors to discharge. Plug back in and test.
• Check supply voltage: Verify the outlet provides stable voltage within the range specified on the rating label. Avoid using long or undersized extension cords.
• Inspect control connections: Remove the top or front panel to access the display board and main control PCB. Reseat all ribbon cables and connectors between the display and main board.
• Look for damage: Examine the PCB for burn marks, swollen capacitors, or corrosion. Any visible damage usually means the board must be replaced.
• Environmental factors: Ensure the unit is not exposed to excessive moisture or condensation around the control area, which can cause intermittent faults.
• Replace PCB: If E9 persists after reset and connector checks, replace the main control PCB with the correct Severin spare part. Transfer any configuration jumpers as per service documentation.