Daikin HXY080A8V1BF, Installation And Operation Manual, Page: 33 / 48

125A8V1BF
VRV IV System indoor unit
4P405267-1C – 2021.04
Installation and operation manual
31
Field settings define the parameters for the weather dependent
operation of the unit. Refer to the chapter "8.3. Field settings" on
page 17 for a detailed description how to set one or more field
settings.
T
t
Target water temperature
T
A
Ambient (outdoor) temperature
Shift value Shift value

[3 - 00] Low ambient temperature (Lo_A): low outdoor
temperature.

[3 - 01] High ambient temperature (Hi_A): high outdoor
temperature.

[3 - 02] Set point at low ambient temperature (Lo_Ti): the target
outgoing water temperature when the outdoor temperature
equals or drops below the low ambient temperature (Lo_A).

Note that the Lo_Ti value should be higher than Hi_Ti, as for
colder outdoor temperatures (i.e. Lo_A) warmer water is
required.

[3 - 03] Set point at high ambient temperature (Hi_Ti): the target
outgoing water temperature when the outdoor temperature
equals or rises above the high ambient temperature (Hi_A).
Note that the Hi_Ti value should be lower than Lo_Ti, as for
warmer outdoor temperatures (i.e. Hi_A) less warm water
suffices.
Automatic setback function
Setback function provides the possibility to lower the room
temperature. The setback function can for instance be activated
during the night because the temperature demands during night and
day are not the same.
The setback function is configured through field settings. Refer to the
chapter "8.3. Field settings" on page 17 for a detailed description how
to set one or more field settings.

[2 - 00] Status: defines whether the setback function is turned ON
(1) or OFF (0)

[2 - 01] Start time: time at which setback is started

[2 - 02] Stop time: time at which setback is stopped

[5 - 02] Leaving water setback temperature (temperature drop)
A Normal leaving water temperature set point
B Leaving water setback temperature =A–[5-02]
t Time
T Temperature
11.3.6. Other operation modes
Start up operation (
)
During start up, the icon displays, indicating that the heat
pump is starting up and is not working in a steady state condition.
Defrost operation ( )
In space heating operation, freezing of the outdoor heat exchanger
may occur due to low outdoor temperature. If this risk occurs, the
system goes into defrost operation. After a maximum of 15 minutes of
defrost operation, the system returns to space heating operation.
During defrost operation, space heating operation is not possible.
11.3.7. Temperature read-out mode
On the user interface, the actual temperatures can be displayed.
1 Push and hold the button for 5 seconds.
The leaving water temperature is displayed (icons and
and are blinking).
2 Use the and buttons to display:

The entering water temperature (icons and are
blinking and the icon is flashing slowly).

The indoor temperature (icons and are blinking).

The outdoor temperature (icons and are blinking).
3 Push the button again to leave this mode. If no button is
pressed, the user interface leaves the display mode after 10
seconds.
INFORMATION
If by mistake the value of [3 - 03] is set higher than the value
of [3 - 02], the value of [3 - 03] will always be used.
INFORMATION

Remark that the icon will be flashing during setback
operation.

By default the setback function is enabled.

The setback function can be combined with the
automatic weather dependent set point operation.

Setback function is an automatic daily scheduled
function.
Lo_Ti
Lo_A Hi_A T
A
T
t
+ 05
00
– 05
Hi_Ti
Shift value
[2-01] [2-02]
B
A
T
t
45°C
40°C
5°C [5-02]