The present invention relates to a thickened alkaline liquid hard surface cleaning composition comprising a surfactant system and chelant to provide cleaning and shine. The system includes a processing chamber having numerous penetrations, and seals for effectively sealing the penetrations to the processing chamber. The originally assembled coil support is configured to allow only axial flow to cooling air from a plurality of cooling vents in the armature of the machine. The request for services message includes a delay period, and the controller is configured after transmission of the request for services message to configure the transceiver to enter a reduced power state in which an amount of power consumed by the transceiver is reduced for the delay period. Hereby a functional flow measurement unit is provided which can be tested prior to assembly with a flow meter housing etc.