Digital self-check code: Indicates “dF”or defrosting indicator displays Self-check code of luminotron: Flicker 1 time/1s Self-check information: Hint to defrosting Digital self-check code: Fan motor picture not running Self-check code of luminotron: Flicker 1 time/3s Self-check information: Hint to defense against cold wind Digital self-check code: E2/(L2) Self-check code of luminotron: Flicker 2 times/4s (Flicker