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Compressor pre-heating function: When the outdoor temperature is lower than 3℃and the compressor stops operation for more than 3 hours, or the outdoor temperature islower than 3℃ and the power is just put on, the compressor enters into pre-heatingcondition. When outdoor temp. is more than 5℃ or user operate it, pre-heating conditionwill finish.Ser at min trekker ca 350W for en periode før den starter opp. Tror pre-heat er at det sendes strøm gjennom viklingene på motor i kompressor, altså motor virker som egen "ovn".