Daikin Altherma R Hybrid Installer's Reference Manual page 126

8 | Configuration
Installer reference guide
126
Unit control method ([C‑07])
External room thermostat control
([C‑07]=1)
NOTICE
Room frost protection. Even if you turn OFF the leaving water temperature (main +
additional) control via the home pages (LWT
protection –if enabled– will remain active.
INFORMATION
If a U4 error occurs, room frost protection is NOT guaranteed.
Refer to the sections below for detailed information on room frost protection in
relation to the applicable unit control method.
[C‑07]=2: room thermostat control
Under room thermostat control, room frost protection is guaranteed, even if the
room temperature home page is OFF on the user interface. When room frost
protection ([2‑06]) is enabled and the room temperature drops below the room
antifrost temperature ([2‑05]), the unit will supply leaving water to the heat
emitters to heat up the room again.
# Code
N/A [2-06]
N/A [2-05]
INFORMATION
If a U5 error occurs:
▪
when 1 user interface is connected, room frost protection is NOT guaranteed,
▪
when 2 user interfaces are connected and the second user interface used for
room temperature control is disconnected (due to miswiring, damage of the
cable), then room frost protection is NOT guaranteed.
NOTICE
If Emergency is set to Manual ([A.6.C]=0), and the unit is triggered to start
emergency operation, the user interface will ask confirmation before starting. Room
frost protection is active even if the user does NOT confirm emergency operation.
[C‑07]=1: external room thermostat control
Under external room thermostat control, room frost protection is guaranteed by
the external room thermostat, provided that the leaving water temperature home
page is ON on the user interface, and the auto emergency setting ([A.6.C]) is set to
"1".
Additionally, limited frost protection by the unit is possible:
Room frost protection
Allow for the external room thermostat
to take care of room frost protection:
▪ Turn ON
temperature home page.
main + LWT
Description
Room frost protection
▪ 0: disabled (default)
▪ 1: enabled
Room antifrost temperature
4°C~16°C (default: 8°C)
the leaving water
add), room frost
CHYHBH05+08AF + EHYKOMB33A
Daikin Altherma R Hybrid
4P471761-1E – 2020.10