POLYPOOL PP1465 User Instructions page 15

"Holiday" function can be interrupted by returning to
the set program by pressing the "SET" button.
5.4 Changing the temper-ature
until the next manual interference
Set the desired temperature by pressing the (-) or (+)
buttons and press the "HOLD" button.
In addition to the temperature display, the key symbol
appears. The temperature value can be arbitrarily
changed with the (-) or (+) button at any time without
limiting manual control. Manual forcing can be
interrupted by returning to the set program by pressing
the "SET" button.
6.
TURN ON THE BACK-
GROUND LIGHT
Press the "LIGHT" button to activate the display
background light which will light up for 10 seconds.
If other buttons are pressed while the backlight is on,
it will go off 10 seconds after the last button has been
pressed.