Haier HRF580YPS User Manual page 16

Fridge temperature can't be adjusted under lock state.
14
Adjust the temperature for Fridge
Unlock the settings by long pressing key "Q" for 3
seconds.
Under unlock state, press key "L" (Temperature zone
selector) to toggle across compartments. When
indicator "A" (Fridge compartment indicator) lights up,
press key "K" (Temperature control "-") or key "M"
(Temperature control "+") to adjust the fridge
compartment temperature. Value displayed on
indicator "D" decreases by 1 °C when key "K" is
pressed each time. The display flahes and turns solid
with the set temperature, then goes off after a few
seconds. Accordingly, value displayed on indicator "D"
increases by 1 °C when key "M" is pressed each time.
The display flahes and turns solid with the set
temperature, then goes off after a few seconds.
Fridge compartment temperature can be adjusted
from 1 °C to 9 °C with 1 °C incremental.