Nibe SMO 40 Installer Manual page 61

LOW HOT WATER TEMPERATURE OR A
LACK OF HOT WATER
This part of the fault-tracing chapter only applies if the
water heater is installed in the system.
• Closed or choked filling valve for the hot water.
– Open the valve.
• Mixing valve (if there is one installed) set too low.
– Adjust the mixer valve.
• SMO 40 in incorrect operating mode.
– Enter menu 4.2. If mode "auto" is selected, select a
higher value on "stop additional heat" in menu 4.9.2.
– If mode "manual" is selected, select "addition".
• Large hot water consumption.
– Wait until the hot water has heated up. Temporarily
increased hot water capacity (temporary lux) can be
activated in menu 2.1.
• Too low hot water setting.
– Enter menu 2.2 and select a higher comfort mode.
• Low hot water access with the "Smart Control"
function active.
– If the hot water usage has been low, the installation
will produce less hot water than normal. Restart the
installation
• Too low or no operating prioritisation of hot water.
– 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 pro-
duction is reduced, which can give lower/uneven
room temperatures.
• "Holiday mode" activated in menu 4.7.
– Enter menu 4.7 and select "Off".
LOW ROOM TEMPERATURE
• Closed thermostats in several rooms.
– Set the thermostats to max, in as many rooms as
possible. Adjust the room temperature via menu
1.1, instead of choking the thermostats.
• SMO 40 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.
NIBE SMO 40
• Too low or no operating prioritisation of heat.
– Enter menu 4.9.1 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 produc-
tion is reduced, which can give smaller amounts of
hot water.
• "Holiday mode" activated in menu 4.7.
– Enter menu 4.7 and select "Off".
• External switch for changing the room heating activ-
ated.
– Check any external switches.
• Air in the climate system.
– Vent the climate system.
• Closed valves to the climate system or heat pump.
– Open the valves.
HIGH ROOM TEMPERATURE
• Too high set value on the automatic heating control.
– Enter menu 1.1 (temperature) and reduce the offset
heating curve. If the room temperature is only high
in cold weather the curve slope in menu 1.9.1
"heating curve" needs adjusting down.
• External switch for changing the room heating activ-
ated.
– Check any external switches.
LOW SYSTEM PRESSURE
• Not enough water in the climate system.
– Fill the climate system with water and check for
leaks. In event of repeated filling, contact the in-
staller.
THE AIR/WATER HEAT PUMP'S
COMPRESSOR DOES NOT START
• There is no heating requirement.
– SMO 40 does not call on heating 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
compressor has started.
• Alarm tripped.
– Follow the display instructions.
Chapter 10 | Disturbances in comfort 61