■
Enter menu 4.9.1 and increase the time for when hot water is to be
prioritised. Note that if the time for hot water is increased the time
for heating production is reduced, which can give lower/uneven room
temperatures.
■
Filter blocked.
■
Clean or replace filter (see page 23).
Low room temperature
■
Closed thermostats in several rooms.
■
See section "Saving tips" on page 29 and menu 1.1 on page 32 for
more detailed information about how to best set the thermostats.
■
Heat pump in incorrect operating mode.
■
Enter menu 4.2. If mode "auto" is selected, select a higher value on
"stop heating" in menu 4.9.2.
■
If mode "manual" is selected, select "heating". If this is not enough,
select "addition".
■
Too low set value on the automatic heating control.
■
Enter menu 1.1 "temperature" and adjust the offset heating curve up.
If the room temperature is only low in cold weather the curve slope
in menu 1.9.1 "heating curve" needs adjusting up.
■
Too low or no operating prioritisation of heat.
■
Enter menu 4.9.1 and increase the time for when heating is to be pri-
oritised. Note that if the time for heating is increased the time for hot
water production is reduced, which can give smaller amounts of hot
water.
■
"comfort mode" "luxury" selected in combination with large hot water
outlet.
■
Enter menu 2.2 and select "economy" or "normal".
■
"Holiday mode" activated in menu 4.7.
■
Enter menu 4.7 and select "Off".
■
External switch for changing the room heating activated.
■
Check any external switches.
■
Air in the heating system.
■
Vent the heating system.
■
Closed valve to the heating system.
■
Open the valve (contact your installer for assistance in finding them).
■
Filter blocked.
■
Clean or replace filter (see page 23).
High room temperature
■
Too high set value on the automatic heating control.
NIBE™ F750Chapter 4 | Disturbances in comfort72
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