cleaning and maintaining _21ENGLISHInternal protections via the unit control systemThis internal protection operates if an internal fault occurs in the air conditioner.Type DescriptionAgainst cold air The internal fan will be off to against cold air when the heat pump isheating.De-ice cycle The internal fan will be off to against cold air when the heat pump isheating.Anti-protection ofinternal batteryThe compressor will be off to protect internal battery when the airconditioner operates in Cool mode.protect compressor The air conditioner does not start operating immediately to protect thecompressor of the outdoor unit after it has been started.If the heat pump is operating in Heat mode, De-ice cycle is actuated to remove frost froman outdoor unit that may have deposited at low temperatures.The internal fan is switched off automatically and restarted only after the de-ice cycle iscompleted.