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42: means "milli ampere" and the p is for power (in watt)
43: impulses per minute for a fan (air)
44: impulses per minute for the flow-sensor (water)
52: this mode starts and stops the aquastream pump to get rid of the air inside the pump and other components
61: just keep it, means aquastream 1 and 2, the I is for the consumption in milli watt
62: same as 61
110: should be "hystérésis" in french
154: I guess it means compactsrtream and is the modified Eheim compact of the external aquaduct. Just keep it.
230: no idea
254: no idea
260: 100°C is warmer than 80°C ;D