Friedrich FSHSW36A3A Installation And Operation Manual page 43

Wired Controller(Optional)
Timer on setting under the "Off" state of the unit is shown as Fig.3.5.2.
Fig.3.5.2 Timer on Setting under the "Off" State of the Unit
Timer range: 0.5-24hr. Every press of
0.5hr. If either of them is pressed continuously, the set time will increase/ decrease by 0.5hr every
0.5s.
RU will make the set time increased or decreased by