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8 Configuration
Installer reference guide
55
ERLQ004~008CA + 08S18CB
Daikin Altherma – Low temperature split
4P401676-1D – 2018.07
Bottom plate heater
Applies only to installation with an outdoor unit ERHQ and the option
bottom plate heater kit is installed.
▪ [F-02] Bottom plate heater ON temperature: defines the outdoor
temperature below which the bottom plate heater will be activated
by indoor unit in order to prevent ice build-up in the bottom plate of
the outdoor unit at lower outdoor temperatures.
▪ [F-03] Bottom plate heater hysteresis: defines the temperature
difference between bottom plate heater ON temperature and the
bottom plate heater OFF temperature.
Bottom plate heater
T
A
[F-02]
[F-03]
a
b
T
A
Outdoor temperature
a
On
b
OFF
CAUTION
The bottom plate heater is controlled via EKRP1HB.
#
Code
Description
N/A
[F-02]
Bottom plate heater ON temperature:
3°C~10°C (default: 3°C)
N/A
[F-03]
Hysteresis: 2°C~5°C (default: 5°C)
INFORMATION
Depending on setting [F-04], contact Y2, located on digital
I/O PCB EKRP1HB, controls the optional bottom plate
heater. See the illustration below for the schematic location
of this contact. For the complete wiring, see the wiring
diagram.
YC Y1
Y2
Y3 Y4
X1
X2
X3
X4
OFF ON
X2M
SS1
X1M
8.3.4
System settings
Priorities
#
Code
Description
N/A
[5‑02]
Space heating priority.
Defines whether backup heater will
assist the heat pump during domestic
hot water operation.
Consequence: Shorter tank heating
operation time and shorter interruption
of the space heating cycle.
This setting MUST always be 1.
[5‑01] Equilibrium temperature and
[5‑03] Space heating priority
temperature are related to backup
heater. So, you must set [5‑03] equal or
a few degrees higher than [5‑01].
If the backup heater operation is limited
([4‑00]=0) and the outdoor temperature
is lower than setting [5‑03], the
domestic hot water will not be heated
with the backup heater.
N/A
[5‑03]
Space heating priority temperature.
Defines the outdoor temperature which
below the backup heater will assist
during domestic hot water heating.
Auto-restart
When power returns after a power supply failure, the auto restart
function reapplies the remote controller settings at the time of the
power failure. Therefore, it is recommended to always enable the
function.
If the preferential kWh rate power supply is of the type that power
supply is interrupted, always enable the auto restart function.
Continuous indoor unit control can be guaranteed independent of the
preferential kWh rate power supply status, by connecting the indoor
unit to a normal kWh rate power supply.
#
Code
Description
[A.6.1]
[3‑00]
Is the auto restart function of the unit
allowed?
▪ 0: No
▪ 1 (default): Yes
Preferential kWh rate power supply
INFORMATION
The preferential kWh rate power supply contact is
connected to the same terminals (X5M/3+4) as the safety
thermostat for the additional zone. It is only possible for the
system to have EITHER preferential kWh rate power
supply OR a safety thermostat for the additional zone.