Data Sheet for Product

9
Siemens
A6V12071353_en--_b
Smart Infrastructure
2021-12-15
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 according-
ly.
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
Keylock can be activated or deactivated via parameter P14 (see Control parameters [▶ 6])
when the unit is in ON and OFF mode.
Operating modes
The following operating modes are available:
Normal mode
In Normal mode (ON), the VRF HMI unit displays the room temperature value, available user
selection and status of the VRF indoor unit.
To save energy, the minimum (P09) and maximum (P10) setpoint can be set for limiting the
available setpoint range.
OFF mode
In OFF mode, VRF indoor unit is turned off.
ECO mode
When ECO mode is selected, the VRF outdoor unit runs in an energy saving mode. Only
one VRF HMI unit can be set as master unit or a master controller is used to select ECO
mode.
Timer with delay Off mode
In timer with delay Off mode, the timer starts counting down according to the set hour when
parameter P28 is enabled. When the timer expires, the device automatically turns off.
1. Activation of timer with delay Off mode
When P28=1, press and hold for more than 3 seconds to enter delay Off timer mode.
2. Setting the timer with delay Off mode
– A preset value (1h) is displayed after entering delay Off timer mode.