Daikin Altherma 3 WS EWSAH06UD 9W Series Installer's Reference Manual page 196

11 | Configuration
Emergency
Installer reference guide
196
(a)
If the value [4-07] is set lower, then the lowest value will be used in all operation modes.
Emergency
When the heat pump fails to operate, the backup heater can serve as an
emergency heater. It then takes over the heat load either automatically or by
manual interaction.
▪ When Emergency is set to Automatic and a heat pump failure occurs, the
backup heater automatically takes over the domestic hot water production and
space heating.
▪ When Emergency is set to Manual and a heat pump failure occurs, the
domestic hot water heating and space heating stops.
To manually recover it via the user interface, go to the Malfunctioning main
menu screen and confirm whether the backup heater can take over the heat load
or not.
▪ Alternatively, when Emergency is set to:
- auto SH reduced/DHW on, space heating is reduced but domestic hot
water is still available.
- auto SH reduced/DHW off, space heating is reduced and domestic hot
water is NOT available.
- auto SH normal/DHW
domestic hot water is NOT available.
Similarly as in Manual mode, the unit can take the full load with the backup
heater if the user activates this via the Malfunctioning main menu screen.
To keep energy consumption low, we recommend to set Emergency to auto SH
reduced/DHW off if the house is unattended for longer periods.
# Code
[9.5.1] N/A
INFORMATION
If a heat pump failure occurs and Emergency is not set to Automatic (setting 1),
the room frost protection function, the underfloor heating screed dryout function,
and the water pipe antifreeze function will remain active even if the user does NOT
confirm emergency operation.
Compressor forced off
Compressor forced off mode can be activated to only allow the backup
heater to provide domestic hot water and space heating. This is, for example,
useful when the central water loop circuit is not yet ready to be used. When this
mode is activated:
▪ Heat pump operation is NOT possible
▪ Cooling is NOT possible
off, space heating operates as normally but
Description
▪ 0: Manual
▪ 1: Automatic
▪ 2: auto SH reduced/DHW on
▪ 3: auto SH reduced/DHW off
▪ 4: auto SH normal/DHW off
EWSAH/X06UD
Daikin Altherma 3 WS
4P675765-1 – 2022.04