What happens when the batteries are connected the wrong way or if they are not present?

The display shows 2 flashing icons: the "battery" symbol and a "warning" symbol, the latter represented by a triangle with an exclamation mark inside. The flashing will persist until the situation is rectified with both batteries charged and inserted correctly. As long as this situation of misplaced/missing batteries persists, Clima-phone part no. 01913 will continue to perform all of its functions, however, in case of a power outage, it will shut down immediately, disabling the outputs (relays and auxiliary output).