APS Lite ver.2 October/2006 Pre-cooling Report 12/19/2006 Tokoku **** Only "Tank Switch" log are updated. The system of tank swith. * The important point is that three conditions (in red) for each tank are sensed correctly. Printable pdf Log Memo - The three conditions for each tank work in conjunction correctly except around tank replacement. - The "both empty" relay works correctly.