Daikin ERLA03DAV3, Installer'S Reference Manual, Page: 107 / 192

9 | Configuration
Installer reference guide
107
ERLA EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1A – 2020.05
Digital I/O PCB
# Code Description
N/A [C-02] Ext. backup heat src
Indicates if the space heating is also performed
by means of another heat source than the
system.
▪ 0 ( No )(default): NOT installed.
▪ 1 ( Bivalent ): Installed. The auxiliary boiler
(gasboiler, oil burner) will operate when the
outdoor ambient temperature is low. During
the bivalent operation, the heat pump is turned
OFF. Set this value in case an auxililary boiler is
used. See
"5 Application guidelines" [
4
23].
N/A [C-09] Alarm output
Indicates the logic of the alarm output on the
digital I/O PCB during malfunctioning.
▪ 0 ( Normally open ): The alarm output will be
powered when an alarm occurs. By setting this
value, a distinction is made between the
detection of an alarm, and the detection of a
power failure.
▪ 1 ( Normally closed ): The alarm output will
NOT be powered when an alarm occurs.
Alarm output logic
[C-09] Alarm No alarm No power supply
to unit
0 (default) Closed output Open output Open output
Demand PCB
The demand PCB is used to enable the power consumption control by digital
inputs. See
"5 Application guidelines" [ 4 23].
# Code Description
N/A [D-04] Demand PCB
Indicates if the optional demand PCB is installed.
▪ 0 ( No )
▪ 1 ( Pwr consmp ctrl )
Energy metering
When energy metering is performed by the use of external power meters,
configure the settings as described below. Select the pulse frequency output of
each power meter in accordance with the power meter specifications. It is possible
to connect (up to 2) power meters with different pulse frequencies. When only 1
or no power meter is used, select
No to indicate the corresponding pulse input is
NOT used.