Low hot water temperature or a lack of hot
water
• 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.
• VVM S320 in incorrect operating mode.
– Contact your installer!
• Large hot water consumption.
– Wait until the hot water has heated up. Temporarily
increased hot water capacity can be activated in
home screen "hot water" or in menu 2.1.
• Too low hot water setting.
– Enter menu 2.2 and select a higher demand mode.
• Low hot water access with the “Smart Control”
function active.
– If the hot water usage has been low for an extended
period of time, VVM S320 will produce less hot
water than normal. Activate "More hot water" in
menu 2.1.
• Too low or no operating prioritisation of hot water.
– Contact your installer!
• "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.
• VVM S320 in incorrect operating mode.
– Contact your installer!
• Too low set value on the automatic heating control.
– Go to the Smartguide for help in increasing heating.
You can also change the heating from the home
screen heating.
• Too low or no operating prioritisation of heat.
– Contact your installer!
• "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 or heat pump.
– Open the valves (contact your installer for assistance
in finding them).
High room temperature
• Too high set value on the automatic heating control.
– Go to the Smartguide for help in decreasing heating.
You can also change the heating from the home
screen heating.
• External switch for changing the 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. In event of repeated filling, contact the in-
staller.
The air/water heat pump’s compressor does
not start
• There is no heating or cooling demand (accessory is
required for cooling).
– VVM S320 does not call on heating, cooling or hot
water.
• Alarm tripped.
– VVM S320 temporarily blocked, see menu 3.1 "Op-
erating info" for more information.
– Follow the display instructions.
Only additional heat
If you are unsuccessful in rectifying the fault and are
unable to heat the house, you can, whilst waiting for
assistance, continue running the heat pump in "Addition-
al heat only". This means that additional heat only is used
to heat the house.
SET THE INSTALLATION TO ADDITIONAL
HEAT MODE
1.
Go to menu 4.1 Operating mode.
2.
Select "Additional heat only".
3.
Return to the main menus.
Caution
When commissioning without NIBE air/water
heat pump an alarm communication error may
appear in the display.
The alarm is reset if the relevant heat pump is
deactivated in menu 7.3.2 ("Installed energy
source/heat pump").
NIBE VVM S320Chapter 6 | Disturbances in comfort16
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