– 5 –
Hydro Unit
Owner’s Manual
Meaning of Indication
Heating side [ZONE1, 2]
Hot water side
18. Indication
Description
20. Indication
Description
Lights when floor heater or radiator is
connected (when the system has floor
heater or radiator).
Lights when hot water supply system
is connected (when the system has
hot water supply).
Lights when controlling the second
temperature.
(It may not light depending on the
system)
The [
] mark lights for operation mode for which temperature is to be changed.
Lights during heating or cooling
operation using the heat pump.
Lights when hot water supply
operation is performed by heat pump.
Lights when the electric heater, inside
the hydro unit, is energised during a
heating operation.
Lights when the electric cylinder
heater is energised during hot water
operation.
Lights when heating is selected.
Lights during hot water supply
operation.
Lights when cooling is selected.
Lights while hot water boost is
activated.
Lights when the FROST
PROTECTION button is pressed and
goes out when the button is pressed
again.
Lights when the ANTI BACTERIA
button is pressed and goes out when
the button is pressed again.
Lights when Auto operation is
selected.
Displays heating/cooling set
temperature.
(Heating: 20 to 55 °C, factory default:
Auto, cooling: 7 to 25 °C)
Goes out when Auto operation is
selected.
When room temperature control is
selected with optional second remote
controller, it displays set room
temperature. *
Displays hot water set temperature.
(40 to 75 °C, factory default: 65 °C)
°C
Lights when the set temperature or sensor's water temperature is displayed with the 7-segment
indicator.
* Ask your installer about room temperature control setting.
18
19
21
20
▼
Fig. 2-02
5-EN
