W&H assistina MB-300 Instructions For Use Manual page 44

11. Error messages
LED display
No LED lit up
No LED lit up
No LED lit up
or
all LED lit up orange
Description
Device in standby mode
Device not connected to the mains
supply.
Electronics defective.
Remedy
> Press the »Start« button.
> Connect the power supply.
> Send the entire unit to an authorized W&H service
partner.
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