켜기
- 1Press 전원. The display lights up.
Navien's 'on水' six-button controller: 난방 cycles room / floor / timer, + / − sets the number, and 외출 doubles as hot-water-only.

실내 at 21–23°C, hot water 45°C, pre-heat left on in winter. 외출 only for trips.
| 현재온도 | Current temperature | The room temperature now. |
|---|---|---|
| 희망온도 | Target temperature | The temperature you set. |
| 실내 / 온돌 / 예약 | Room / Floor / Timer | The active heating mode. |
| 외출 | Away | No heating; hot water and frost protection only. |
| 온수예열 | Hot-water pre-heat | Pre-heat is on (only on some condensing boilers). |
| 빠른온수 | Quick hot water | Quick hot water is on; it ends after 10 minutes. |
| 온수온도 | Hot-water temperature | Blinks while you set hot water. |
| 운전 / 점검 | Running / Check | Light bar: running = boiler working, check = fault. |
A fault lights the 점검 end of the light bar. Note any code on the display and call 1588-1144.
A/S: 1588-1144