Nibe S1155 Installer Manual page 66

• Low hot water access with the "Smart Control"
function active.
– If the hot water usage has been low for an extended
period of time, S1155 will produce less hot water than
normal. Activate "More hot water" in menu 2.1.
• Too low or no operating prioritisation of hot water.
– Enter menu 7.1.10.1 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 re-
duced, which can give lower/uneven room temperatures.
• "Holiday" activated in menu 6.1.
– Enter menu 6.1 and deactivate.
LOW ROOM TEMPERATURE
• Closed thermostats in several rooms.
– Set the thermostats to max in as many rooms as possible.
Adjust the room temperature via home screen heating,
rather than choking the thermostats.
• S1155 in incorrect operating mode.
– Enter menu 4.1 ("Operating mode"). If "auto" mode is se-
lected, select a higher value for "stop heating" in menu
7.1.10.2.
– If "manual" mode is selected, select "heating". If this is not
enough, then also select "additional heat".
• Too low set value on the automatic heating control.
– Go to home screen heating or menu 1.30.1 (Curve, heat-
ing) and adjust the heating curve offset upwards. If the
room temperature is only low in cold weather, the curve
slope in menu 1.30.1 (Curve, heating) may need to be
adjusted upwards.
• Too low or no operating prioritisation of heat.
– Enter menu 7.1.10.1 and increase the time for when
heating is to be prioritised. 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.
• "Holiday mode" activated in menu 6.1.
– Enter menu 6.1 and deactivate.
• External switch for changing room temperature activ-
ated.
– Check any external switches.
• Air in the climate system.
– Vent the climate system.
• Closed valves to the climate system.
– Open the valves.
HIGH ROOM TEMPERATURE
• Too high set value on the automatic heating control.
66 Chapter 11 | Disturbances in comfort
– Go to home screen heating or menu 1.30.1 (Curve, heat-
ing) and adjust the heating curve offset downwards. If the
room temperature is only high in cold weather, the curve
slope in menu 1.30.1 (Curve, heating) may need to be
adjusted downwards.
• External switch for changing the room temperature
activated.
– Check any external switches.
UNEVEN ROOM TEMPERATURE.
• Incorrectly set heating curve.
– Fine-tune the heating curve in menu 1.30.1.
• Too high set value on "dT at DOT"..
– Go to menu 7.1.6.2 (flow set. climate system) and reduce
the value of "DOT".
• Uneven flow over the radiators.
– Adjust the flow distribution between the radiators.
LOW SYSTEM PRESSURE
• Not enough water in the climate system.
– Fill the climate system with water and check for leaks.
THE COMPRESSOR DOES NOT START
• There is no heating or cooling demand (accessory is
required for cooling).
– S1155 does not call on heating, cooling or hot water.
• Compressor blocked due to the temperature condi-
tions.
– Wait until the temperature is within the product's working
range.
• Minimum time between compressor starts has not
been reached.
– Wait for at least 30 minutes and then check if the com-
pressor has started.
• Alarm tripped.
– Follow the display instructions.
WHINING NOISE IN THE RADIATORS
• Closed thermostats in the rooms and incorrectly set
heating curve.
– Set the thermostats to max in as many rooms as possible.
Fine-tune the heating curve via home screen heating,
rather than choking the thermostats.
• Circulation pump speed set too high.
– Go to menu 7.1.2.2 (Pump speed heating medium GP1)
and reduce the speed of the circulation pump.
• Uneven flow over the radiators.
– Adjust the flow distribution between the radiators.
NIBE S1155