켜기
- 1Touch 전원 (bottom left). The boiler restarts in the last mode used.
A black glossy Lotte touch panel: icons and big white numbers on top, six touch keys below; one key cycles floor/room heating.

바닥 (floor) at 55–60°C while home; 외출/타이머 at 3–4 h with 바닥 50°C when out for the day in winter; hot water 50°C.
| 연소 | Burning | Flame on. |
|---|---|---|
| 바닥 | Floor | Floor-water heating mode (45–80°C). |
| 실내 | Room | Room-air heating mode (10–40°C). |
| 외출 | Away/Timer | Timer cycle active (shown together with 바닥 or 실내). |
| 온수 | Hot water | Hot-water-only mode. |
| Hr | Hours | Number shown is timer hours. |
| E1 | Gas leak | Gas leak detected; boiler stops. Unplug, ventilate, call A/S. |
| d1 | No water supply | Check for a water cut (단수); if none, call A/S. |
| P6 | Water refill | 물보충 — boiler short of heating water. |
| P4 | Leak check | Possible leak; check under the boiler, then call A/S. |
Codes show on the display with the 연소 lamp blinking. From the manual: E1 = gas leak (unplug, ventilate, call A/S); d1 = water supply cut — check, then A/S; P6 = water refill needed; P4 = leak, check then A/S.
A/S: 1588-8888
