... -engine air conditioner control panel: It is fully-automatically control the starting- up, preheat, air conditioner start, as well the cooling of the sub-engineFunction: Fully-automatic control, cool, fresh air, memory ... temp., defrost on at 2°c, defrost off at 4°cConnectorPlug HP5557-22RFaceplate level IP54EMC levelEN50081&EN50082-2Security levelApplied to EN61010-II, Pollution ...