curve slope in the menu 1.9.1 (heating curve) needs to be adjusted
up.
႑
comfort modeluxury selected in combination with large hot water outlet.
႑
Enter menu 2.2 and select economy or normal.
Holiday mode activated in menu 1.3.4.
႑
Enter menu 1.3.4 and select “Off”.
႑
External switch for changing the room heating activated.
႑
Check any external switches.
႑
Air in the heating system.
႑
Vent the heating system.
႑
Closed valves to the heating system.
႑
Open the valves.
High room temperature
႑
Too high set value on the automatic heating control.
႑
Enter menu 1.1 (temperature) and adjust the heat curve offset
downwards. If the room temperature is only high in cold weather the
curve slope in menu 1.9.1 (heating curve) needs to be adjusted down.
႑
External switch for changing the room heating activated.
႑
Check any external switches.
Low system pressure
႑
Not enough water in the heating system.
႑
Top up the water in the heating system.
Low or a lack of ventilation
႑
Filter blocked.
႑
Clean or replace filter (see page 20).
႑
Exhaust air device blocked or throttled down too much.
႑
Check and clean the exhaust air devices (see page 20).
႑
Fan speed in reduced mode.
႑
Enter menu 1.2 and select “normal".
႑
External switch for changing the fan speed activated.
႑
Check any external switches.
71
NIBE™ F470
Chapter 4 |
Disturbances in comfort
