Low hot water temperature or a lack of hot
water
•
Closed or throttled externally mounted filling valve for the
hot water.
–
Open the valve.
•
Mixing valve (if there is one installed) set too low.
–
Adjust the mixer valve.
•
VVM 310 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".
–
Hot water is produced with VVM 310 in "manual" mode.
If there is no air/water heat pump, "addition" must be
activated.
•
Large hot water consumption.
–
Wait until the hot water has heated up. Temporarily in-
creased hot water capacity (temporary lux) can be ac-
tivated in menu 2.1.
•
Too high domestic water flow.
–
Reduce the domestic water flow, see technical specific-
ations for the hot water capacity in the "Technical spe-
cifications" section.
•
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, less hot water than
normal will be produced. Restart the product.
•
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 production is
reduced, which can give lower/uneven room temperat-
ures.
•
"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 pos-
sible. Adjust the room temperature via menu 1.1, instead
of choking the thermostats.
See the "Saving tips" section in the User manual for
more detailed information about how to best set the
thermostats.
•
VVM 310 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 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 4.7.
–
Enter menu 4.7 and select "Off".
•
External switch for changing room temperature activated.
–
Check any external switches.
•
Air in the climate system.
–
Vent the climate system (see
29).
•
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 room temperature activated.
–
Check any external switches.
Low system pressure
•
Not enough water in the climate system.
–
Fill the climate system with water and check for leaks
(see page 29).
The air/water heat pump’s compressor does
not start
•
There is no heating or hot water demand, nor cooling de-
mand (accessory is required for cooling).
–
VVM 310 does not call on heating, hot water or cooling.
•
Compressor blocked due to the temperature conditions.
–
Wait until the temperature is within the product’s work-
ing 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.
–
VVM 310 temporarily blocked, see menu 3.2 "Compressor
information".
55
Chapter 10 | Disturbances in comfort
NIBE VVM 310
