Daikin EWYA004D2V3P Installer's Reference Manual page 164

11 | Configuration
Emergency
(1)
auto SH normal/DHW off has the same effect as Automatic, but should NOT be used because there is no domestic
hot water.
(2)
auto SH reduced/DHW on has the same effect as auto SH reduced/DHW off, but should NOT be used because
there is no domestic hot water.
Installer reference guide
164
Operation
# Code
[9.3.8] [4‑00]
Emergency
When the heat pump fails to operate, the optional external backup heater kit 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 (or auto SH normal/DHW off)
a heat pump failure occurs, the backup heater automatically takes over the heat
load.
▪ When Emergency is set to Manual and a heat pump failure occurs, the 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.
▪ When Emergency is set to auto
(2)
reduced/DHW on)
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] [4-06]
(a)
These settings are not needed because there is no domestic hot water.
INFORMATION
The auto emergency setting can be set in the menu structure of the user interface
only.
Backup heater operation:
▪ 0: Restricted
▪ 1: Allowed
▪ 2: Only DHW: Do NOT use.
SH reduced/DHW
and a heat pump failure occurs, space heating is reduced.
▪ 0: Manual
▪ 1: Automatic
▪ 2: auto SH reduced/DHW on
(a)
Do NOT use.
▪ 3: auto SH reduced/DHW off
▪ 4: auto SH normal/DHW off
(a)
Do NOT use.
Description
off (or auto
Description
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09
(1)
and
SH