켜기
- 1Press 전원 (bottom middle).
A white Alto&Daewoo LCD panel: up/down pairs for heating (left) and hot water (right), and six icon buttons below.

Room mode at 22°C if the controller is away from windows and heaters; otherwise water mode at 60°C. Hot water 43°C. Timer 3 h when out for the day.
| 난방온도 | Heating temp | Room or boiler-water heating setting/reading. |
|---|---|---|
| 온수온도 | Hot-water temp | Hot-water setting. |
| house + thermometer icon | Room mode | Heating controlled by room temperature (5–40°C). |
| radiator icon | Water mode | Heating controlled by boiler-water temperature (45–80°C). |
| flame icon (연소) | Burning | Flame on. |
| suitcase icon (외출) | Away | Away / freeze protection on. |
| timer bar 1–24 | Timer | Dark segments = chosen interval. |
| Uo | Ignition failure | Check the gas valve is open / gas supply. |
| E1 | No water | Heating pipes short of water — check for a water cut, then call A/S. |
| E3 | Overheat | Water not circulating — check the floor manifold valves are open. |
Codes show on the LCD. Uo = no ignition (open gas valve); E1 = no water (check water cut, then A/S); E3 = overheating (open the floor manifold valves); E6 = gas leak; others call 1588-7339.
A/S: 1588-7339