The display shows the current room temperature via the built-in sensor of the VRF HMI unit (factory setting). Alternatively, temperature setpoint or temperature value from VRF indoor unit can be used for the display (P06)
For VRF mode, indicates Auto VRF mode, indicates cooling, indicates heating, indicates ventilation and indicates dehumidification.
Setpoint adjustment and limitations
The factory setting for the basic setpoint is 21 ℃. The setpoint can be adjusted via the +/- buttons. The minimum (P09) and maximum (P10) setpoint limitations can be used to save energy.
There are two different concepts below:
P09<P10 (comfort concept) - typical use case for VRF indoor unit
If the minimum setpoint (P09) is set below the maximum setpoint (P10), the heating setpoint can be adjusted between these two limits. The users desired setpoint and the VRF HMI unit provides the setpoint setting to the VRF indoor unit controls the room temperature accordingly.
P09≥P10 (energy saving concept)
If the minimum limit P09 is set above the maximum limit P10
- The setting range of heating setpoint is 5 ℃…P10 rather than 5…40 ℃.
- The setting range of cooling setpoint is P09…40 ℃.
As a result, the maximum heating setpoint or minimum cooling setpoint can be limited, thus saving energy and lowering costs.
Keylock can be activated or deactivated via parameter P14 (see Control parameters) when the unit is in ON and OFF mode.