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Rectify operating fault
HMC300 – 6 720 813 192 (2014/10)
9 Rectify operating fault
9.1 Rectify “experienced” fault
There can be several reasons for an “experienced” fault, which
are often easy to rectify.
If you are cold or too hot, for example, the following table will
help you to rectify the “experienced” faults.
Symptom Cause Action
The required room
temperature is not reached.
The thermostat valves on the radiators
are set to a temperature that is too low.
Increase the settings for the thermostat valves.
The temperature for heating mode is
set too low.
Increase the temperature for heating mode if the
thermostat valves are completely open.
The system is working in summer
mode.
Reconnect the system to winter mode ( chapter 5.2.2,
page 19).
The extra heat source flow
temperature control is set too low.
Increase the setting on the flow temperature control
( instructions for heat source).
There is air in the heating system. Bleed the radiators and heating system.
The outdoor sensor is not in a good
position.
Contact your installer and get him to move the outdoor
sensor to a better place.
The room temperature is
considerably higher than
what is wanted.
The radiators get too hot. Set a lower temperature for the operating mode in
question.
Set lower temperatures for all modes.
Set the thermostat valves in adjacent rooms to a lower
setting.
If the room unit is installed in the
reference room: the position of the
unit is not suitable, e.g. on outer wall,
near a window, or where there is
draught.
Contact your installer and get him to move the room sensor
to a better place.
Excessive changes in
temperature.
Repeated temporary effect of induced
heat (e.g. from sunlight, lighting,
television or stove).
Contact your installer and get him to move the room sensor
to a better place.
The temperature rises
instead of dropping.
The time is set incorrectly. Set the time.
Room temperature too high
during temperature
reduction mode.
The building stores a lot of heat. Select a previous break point for temperature reduction
mode.
The hot water heater does
not get hot.
The hot water temperature
1)
is set too
low on the heat source.
Switch from DHW reduced to DHW.
The hot water temperature
1)
is not set
too low on the heat source
Check the settings on the control unit.
The hot water program is set
incorrectly.
Set the hot water program.
The configuration of the hot water
heating does not suit the heating
system.
Contact the installer and get him to check the settings.
Table 39 Rectify "experienced" fault
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