Crystal Vertical 120 - Forced De-icing Function; LED Enable;Disable

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4. Use
4.6 Forced de-icing function
Long and 3 seconds to enter forced de-icing, the symbol flashes.
4.7 Enable / Disable LEDs
Hold
and
for 3 seconds to activate or deactivate the front LEDs. The LEDs are reactivated
automatically after a power cut.
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