Daikin ERLQ004CA Installer's Reference Manual page 59

# Code
[A.3.2.4] N/A Room temp. step
▪ 1°C
temperature on the user interface is
settable per 1°C.
▪ 0.5°C. The desired room temperature
on the user interface is settable per
0.5°C. The actual room temperature is
displayed with an accuracy of 0.1°C.
Room temperature hysteresis
ONLY applicable in case of room thermostat control. The hysteresis
band around the desired room temperature is settable. It is
recommended NOT to change the room temperature hysteresis as it
is set for an optimal use of the system.
a
b
c
[ 9-0C ]
a Room temperature
b Actual room temperature
c Desired room temperature
d Time
# Code
N/A [9-0C] 1°C~6°C (default: 1°C)
Room temperature offset
ONLY applicable in case of room thermostat control. You can
calibrate the (external) room temperature sensor. It is possible to
give an offset to the room thermistor value measured by the user
interface or by the external room sensor. The settings can be used
to compensate for situations where the user interface or external
room sensor CANNOT be installed on the ideal installation location
(see installation manual and/or installer reference guide).
# Code
Room temp. offset: Offset on the actual room temperature
measured on the user interface sensor.
[A.3.2.2] [2-0A] –5°C~5°C, step 0.5°C (default: 0°C)
Ext. room sensor offset: ONLY applicable if the external room
sensor option is installed and configured (see [C-08])
[A.3.2.3] [2-09] –5°C~5°C, step 0.5°C (default: 0°C)
Room frost protection
Room frost protection prevents the room from getting too cold. This
setting behaves differently depending on the set unit control method
([C‑07]). Perform actions according to the table below:
Unit control method ([C‑07])
Room thermostat control
([C‑07]=2)
External room thermostat control
([C‑07]=1)
Leaving water temperature
control ([C‑07]=0)
ERLQ004~008CA + EHBH/X04+08CB
Daikin Altherma – Low temperature split
4P384972-1B – 2017.04
Description
(default). The desired room
d
Description
Description
Room frost protection
Allow for the room thermostat to
take care of room frost
protection:
▪ Set [2‑06] to "1"
▪ Set the room antifrost
temperature ([2‑05]).
Allow for the external room
thermostat to take care of room
frost protection:
▪ Turn ON the leaving water
temperature home page.
Room frost protection is NOT
guaranteed.
NOTICE
If the system does NOT contain a backup heater, do NOT
change the default room antifrost temperature.
INFORMATION
If a U4 error occurs, room frost protection is NOT
guaranteed.
Refer to the sections below for detailed information on room frost
protection in relation to the applicable unit control method.
[C‑07]=2: room thermostat control
Under room thermostat control, room frost protection is guaranteed,
even if the room temperature home page is OFF on the user
interface. When room frost protection ([2‑06]) is enabled and the
room temperature drops below the room antifrost temperature
([2‑05]), the unit will supply leaving water to the heat emitters to heat
up the room again.
# Code
N/A [2-06] Room frost protection
▪ 0: disabled
▪ 1: enabled (default)
N/A [2-05] Room antifrost temperature
4°C~16°C (default: 12°C)
INFORMATION
If a U5 error occurs:
▪ when 1 user interface is connected, room frost
protection is NOT guaranteed,
▪ when 2 user interfaces are connected and the second
user interface used for room temperature control is
disconnected (due to miswiring, damage of the cable),
then room frost protection is NOT guaranteed.
NOTICE
If Emergency is set to Manual ([A.6.C]=0), and the unit is
triggered to start emergency operation, the user interface
will ask confirmation before starting. Room frost protection
is active even if the user does NOT confirm emergency
operation.
[C‑07]=1: external room thermostat control
Under external room thermostat control, room frost protection is
guaranteed by the external room thermostat, provided that the
leaving water temperature home page is ON on the user interface,
and the auto emergency setting ([A.6.C]) is set to "1".
Additionally, limited frost protection by the unit is possible:
8 Configuration
Description
Installer reference guide
59