Daikin EAVH16S23DA6V Installer's Reference Manual page 121

EPGA11~16DAV3(7) + EAVH/X16S18+23DA6V(7)+9W(7)
Daikin Altherma 3 H F
4P556070-1A – 2021.09
Main zone unit control method [2.9]
Leaving water temperature control
([C‑07]=0)
External room thermostat control
([C‑07]=1)
Room thermostat control
([C‑07]=2)
INFORMATION
If a U4 error occurs, room frost protection is NOT guaranteed.
NOTICE
Room frost protection. Even if you turn OFF space heating/cooling operation ([C.2]:
Operation > Space
enabled– can still activate. However, for leaving water temperature control and
external room thermostat control, the protection is NOT guaranteed.
For more detailed information about room frost protection in relation to the
applicable unit control method, see the sections below.
Leaving water temperature control ([C‑07]=0)
Under leaving water temperature control, room frost protection is NOT
guaranteed. However, if room antifrost [1.4] is activated, limited frost protection
by the unit is possible:
If...
Space heating/cooling is OFF and
the outdoor ambient temperature
drops below 4°C
Space heating/cooling is ON and
the operation mode is "heating"
Space heating/cooling is ON and
the operation mode is "cooling"
External room thermostat control ([C‑07]=1)
Under external room thermostat control, room frost protection is guaranteed by
the external room thermostat, provided that Space heating/cooling [C.2] is
turned ON and the emergency setting [9.5] is set to automatic.
In case of one leaving water temperature zone:
Room frost protection is NOT guaranteed.
Allow for the external room thermostat to
take care of room frost protection:
▪ Set [C.2]
cooling=On.
Allow for the user interface used as room
thermostat to take care of room frost
protection:
▪ Set antifrost [1.4.1] Activation=Yes.
▪ Set the temperature of the antifrost
function in [1.4.2] Room setpoint.
heating/cooling), room frost protection operation –if
The unit will supply leaving water to the
heat emitters to heat up the room
again, and the leaving water
temperature setpoint will be lowered.
The unit will supply leaving water to the
heat emitters to heat up the room
according to normal logic.
There is no room frost protection.
10 Configuration
|
Description
Space heating/
Then...
Installer reference guide
121