Daikin EKHWMX300CA [10/64] X operation
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Daikin EKHWMX300CA [10/64] X operation

Daikin EKHWMX300CA [10/64] X operation
3 x Operation
Operating instructions
10
Daikin Control unit
RoCon mb
008.1446899_00 – 07/2019 – EN
The operating modes can be affected by additional functions
such as:
– Weather-dependent T-HS control
– Switching time program
– Setting the temperature target value
– Setting on the room station
– Setting on the room thermostat
– Switch status on the EXT input (external operating mode
changeover)
– Switch status at the EBA input (external requirement request)
– Whisper mode
– Interlink function
– Switch status at the Smart Grid input (EVU function
Smart Grid)
– Switch status at the EVU input (EVU function HT/NT (off-
peak) or Smart Grid)
– Defrost function
– Frost protection function
– Screed function
– Air purge
– Manual operation
– EHS emergency operation
Keylock
The control panel of the RoCon mb can be locked against inad-
vertent operation (see fig. 3-4).
It is unlocked in the same way.
Precondition for this function is that the [Keylock Function] pa-
rameter at the "Setup" level is set to "On" (see chap. 6.2.1,
tab. 6-1).
Keylock Function
On
Keylock Function
Keylock Function
Off
Fig. 3-4 Activating (1.) and deactivating (4.) the key lock
3.4 Basic functions and operating modes
If the storage tank temperature falls below specific
minimum values, the Daikin Altherma M ECH
2
O's
safety settings prevent the heat pump from being
operated at low outside temperatures:
– Outside temperature < -2 °C, minimum storage tank
temperature = 30 °C
– Outside temperature < 12 °C, minimum storage tank
temperature = 23 °C.
Without backup heater:
The storage tank water must be heated to the required
minimum storage tank temperature with an external heater
booster.
With backup heater (EKBUxx):
At an outside temperature of < 12 °C and a storage tank tem-
perature of < 35 °C, the backup heater (EKBUxx) is automati-
cally switched on to heat the storage tank water to at least
35 °C.
● To speed up the heating process with backup heater,
temporarily set
– parameter [Function Heating Rod] = "1" and
– parameter [Power DHW] to the maximum value of the
backup heater.
– Set the rotary switch to
operating mode, and set the
parameter [1x Hot Water] to "On".
Automatic defrost function
At low outdoor temperatures and corresponding humidity, the
heat pump outdoor unit may ice up. This icing impairs efficient op-
eration. The system detects this status automatically and starts
the defrost function.
While the defrost function is active, heat is drawn from the hot
water storage tank, and the backup heater is activated if nec-
essary. Depending on the heat required for the defrost function,
heating the direct heating circuit may be temporarily interrupted
during the defrosting process.
After a maximum of 8 minutes, the system switches back to
normal operation.
3.4.1 System information (Info)
In this rotary switch position, the rotary button can be used to
query all system temperatures, the Daikin Altherma M ECH
2
O
type, various software information and the operating states of all
system components in succession. The number of displayed pa-
rameters depends on which components are connected.
No adjustments can be made to these values.
● Set the rotary switch to the "Info"
position.
Standard display is shown (see fig. 3-2).
● Press the rotary button briefly.
Parameter overview is displayed.
● Use the rotary button to select the desired information level.
● Confirm the selection with a brief push of the rotary button.
Value is displayed (example, see fig. 3-6).
● Use the rotary button to select the individual information.
Further explanations on, and possible display values for, this rotary switch position
can be found in tab. 3-5 and chap. 6.10.

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