in the menu 1.9.1 (heating curve) needs to be
adjusted up.
႑
Too low or no operating prioritisation of heat.
႑
Enter menu 4.9.1 and increase the time for when
heating is to be prioritised.
႑
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 activ-
ated.
႑
Check any external switches.
႑
Circulation pump(s) (GP1 and/or GP2) stopped.
႑
See section "Helping the circulation pump to
start" on page 68.
႑
Air in the climate system.
႑
Vent the climate system (see page 27).
႑
Closed valves (QM20), (QM32)to the climate 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 activ-
ated.
႑
Check any external switches.
Low system pressure
႑
Not enough water in the climate system.
႑
Top up the water in the climate system (see page
27).
Low or a lack of ventilation
This part of the fault-tracing chapter only applies if the
NIBE FLM accessory is installed.
႑
Filter (HQ10) blocked.
႑
Clean or replace the filter.
႑
Exhaust air device blocked or throttled down too
much.
႑
Check and clean the exhaust air devices.
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.
High or distracting ventilation
This part of the fault-tracing chapter only applies if the
NIBE FLM accessory is installed.
႑
The ventilation is not adjusted.
႑
Order/implement ventilation adjustment.
႑
Fan speed in forced mode.
႑
Enter menu 1.2 and select “normal".
႑
External switch for changing the fan speed activated.
႑
Check any external switches.
႑
Filter (HQ10) blocked.
႑
Clean or replace the filter.
The compressor does not start
႑
There is no heating requirement.
႑
The heat pump does not call on heating nor hot
water.
႑
The heat pump defrosts.
႑
Minimum time between compressor starts has not
been reached.
႑
Wait 30 minutes and check if the compressor has
started.
႑
Alarm tripped.
႑
Follow the display instructions.
Gurgling sound
This part of the fault-tracing chapter only applies if the
NIBE FLM accessory is installed.
႑
Not enough water in the water seal.
႑
Fill the water seal with water.
႑
Choked water seal.
႑
Check and adjust the condensation water hose.
NIBE™ F1245Chapter 10 | Disturbances in comfort74
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