Mennekes Display / HMI Failure

Charger powers on but display is blank or unreadable; LEDs may still function.

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.

Possible Causes

Failed LCD or LED display module, Loose ribbon cable, Backlight failure, HMI firmware corruption

Safety first: Isolate the charger before removing the front cover.

Check brightness/contrast: Some Mennekes displays have adjustable brightness; ensure it is not set to minimum.
Inspect connections: Reseat the ribbon cable or connector between the display and main PCB.
Look for damage: Check the display board for cracks, moisture, or burnt components.
Module replacement: If the display remains blank but the charger otherwise operates (EV charges, LEDs respond), replace the HMI/display module.

Medium 3/5

HMI / Display Module

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