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3.4 Basic functions and operating modes
If the storage temperature falls below a certain
minimum value, the safety settings of the Daikin
Altherma EHS(X/H) prevent the operation of the heat
pump in the case of low external temperatures:
– External temperature < -2 °C, minimum storage
temperature = 30 °C
– External temperature < 12 °C, minimum storage
temperature = 23 °C.
Without backup heater:
The storage tank water must be heated to the minimum
required storage temperature by an external heater.
With backup heater (EKBUxx):
With an outdoor temperature < 12 °C and a storage tank
temperature < 35 °C, the backup heater (BUH) is
switched on automatically on in order to heat up the
storage tank water to at least 35 °C.
● In order to accelerate the heating process with
the back-up heater, temporarily
– Parameter [Function Heating Rod] = "1" and
– Set parameter [Power DHW] to the maximum
value of the backup heater.
– Set rotary switch to the operating mode
parameter [1x Hot Water] to "On". Following
successful heating, reset the parameters to
"Off".
Automatic defrosting function
At low outdoor temperatures and corresponding humidity values,
the external heat pump unit may ice up. This icing impairs effi-
cient operation. The system detects this condition automatically
and starts the defrosting function.
During the defrosting function, heat is drawn from the hot water
storage tank and the backup heater is turned on if required. De-
pending on the heat demand for the defrosting function, heating
of the direct heating circuit may be interrupted temporarily.
After 8 minutes at most, the system returns to normal mode.
3.4.1 System information (Info)
In this rotary switch position, the rotary switch can be used to call
up all the system temperatures, the type of Daikin Altherma
EHS(X/H), various software information and the operating sta-
tuses of all system components, one after the other. The number
of displayed parameters depends on the connected components.
No settings can be made to these values.
● Place the rotary switch in the "Info"
Standard display is shown (see fig. 3-2).
● Press the rotary switch briefly.
The parameter overview is displayed.
● Select the desired information level with the rotary switch.
● Confirm the changes with a brief push of the rotary switch.
The value is displayed (for example, see fig. 3-6).
● Select the individual information with the rotary switch.
More detailed explanations and possible setting values for this rotary switch setting
can be seen in chapter 5.10.
Daikin RoCon HP
Daikin Control
008.1420844 – 05/2014
Display operating data
The current operating data for the Daikin Altherma EHS(X/H) are
shown on the RoCon HP Control in the "Overview" information
level.
The display of the operating data is not divided into several
windows. By adjusting the rotary switch it is toggled between the
windows.
Short
designation
and
position.
Explanation of the displayed value
Mode Current mode of the heat pump:
: Heating
: Cooling
: Domestic hot water generation
: Automatic defrosting function active
Ext
Current energy mode of the heat pump:
LT: EVU function active and low tariff.
HT: EVU function active and standard tariff.
SGN: SMART GRID - Function active, normal
mode.
SG1: SMART GRID - Function active, rejection,
expensive power.
SG2: SMART GRID - Function active, multiple
operation, cheap power.
SG3: SMART GRID - Function active, start
command and multiple operation, cheap power.
- - -: No external mode active, heat pump works in
normal mode.
RT
Parameter [Room thermostat] / [Interlink fct]
= Off: - - -
Parameter [Room thermostat] = On:
–
: Heating or cooling demand
–
: No heating demand
Parameter [Interlink fct] = On (priority):
– - - -: Only frost protection
– IL1: Normal inflow target temperature
– IL2:
– Increased inflow target temperature in
heating operation
– Decreased inflow target temperature in
cooling operation
Pump Actual output of the internal heating circulation
pump in %
EHS
Current output of the backup heater in kW
BPV
Current position of the mixing valve 3UVB1
(100 % = A, 0 % = B)
TV
Current inflow temperature after the plate heat ex-
changer (t
)
V1
TVBH Current heating inflow temperature or temp. after
heating support heat exchanger (t
TR
Current heating return flow temperature (t
Tdhw Current temperature in domestic hot water
storage tank (t
)
DHW1
TA
Actual outdoor temperature (measured by op-
tional temperature sensor RoCon OT1)
V
Actual volume flow (flow rate) in the heating
system
3
x
Operation
)
V, BH
)
R1
Operating instructions
9
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