Daikin Altherma H Hybrid EJHA04AAV3 Installer's Reference Manual page 160

11 | Configuration
Heat source settings
Installer reference guide
160
NOTICE
Disinfection mode. Even if you turn OFF domestic hot water operation via the
DHW tank temperature home page (Tank), disinfection mode will remain active.
INFORMATION
Disinfection function is restarted in case the domestic hot water temperature drops
5°C below the disinfection target temperature within the duration time.
INFORMATION
An AH error occurs if you do the following during disinfection:
▪
Set the user permission level to Installer.
▪
Go to the DHW tank temperature home page (Tank).
▪
Press to interrupt the disinfection.
Auto emergency
When the heat pump fails to operate, the gas boiler can serve as an emergency
back-up heater and either automatically or non-automatically take over the entire
heat load.
▪ When auto emergency is set to Automatic and a heat pump failure occurs, the
boiler will automatically take over the heat load.
▪ When auto emergency is set to Manual and a heat pump failure occurs, the
domestic hot water and space heating operations will stop and need to be
recovered manually. The user interface will then ask the user to confirm whether
the boiler can take over the entire heat load or not.
When the heat pump fails,
unattended for longer periods, we recommend to set [A.6.C] Emergency to
Automatic.
# Code
[A.6.C] N/A
INFORMATION
The auto emergency setting can be set in the menu structure of the user interface
only.
INFORMATION
If a heat pump failure occurs and [A.6.C] is set to Manual, the following functions will
remain active even if the user does NOT confirm emergency operation:
- Room frost protection
- Underfloor heating screed dryout
- Water pipe freeze prevention
However, the disinfection function will be activated ONLY if the user confirms
emergency operation via the user interface.
Bivalent
Only applicable in case of third-party gas boiler.
will appear on the user interface. If the house is
Description
Emergency:
▪ 0: Manual
▪ 1: Automatic
EJHA04AAV3 + EHY2KOMB28+32AA
Daikin Altherma H Hybrid
4P531180-1D – 2025.03