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6
Controller and electronic components
Item
Designation
A
View from front
B
Rear view
1
Control panel for the RoCon B1
2
Plug connection for communication cable
3
Communication cable
Tab. 6-3
Legend for
Image 6-2
1
Release the lugs on one side of the control panel by sliding in a
small flat bladed screwdriver
control panel to the front.
2
To remove completely, disconnect the communication cable
age
6-2, item 3) on the back of the control panel.
Installing the control panel
▪ Connect the communication cable to the back of the control unit
(Image
6-2, item 2).
▪ Slide the control panel into the control panel cut-out until the lugs
click in place.
6.3
Change cables
DANGER: RISK OF ELECTROCUTION
Touching live parts can result in an electric shock and
lead to potentially fatal injuries and burns.
▪ Before beginning work on cables, disconnect them from
the power supply (switch off external main switch, re-
move fuse) and secure against unintentional restart.
The connection cables can be loosened either on the boiler control
panel or on the component in question.
▪ The cables for the internal components in the device are connec-
ted to the circuit board connectors and cannot be released. They
can be released from the respective components where they are
plugged in.
▪ The cables for external components (e.g. external temperature
sensors) or for components not included in the scope of supply
are connected to the circuit board connectors by bolted terminals.
Changing cables
1
Remove the boiler cladding (see
2
Open the boiler control panel (see
3
Remove the strain relief of the affected sensor or connection
cable and lift out the cable.
4
Pull out the corresponding connector from the circuit board, dis-
connect the cable from the circuit board connector if necessary.
5
Separate the other cable end from the component (release plug
connection or remove the cable from the terminal).
6
Replace the cable. Ensure that the cable cross section is cor-
rect.
Install the new cable in reverse order. Whilst doing so, ensure the
following:
▪ The technical specifications of the new cable must correspond to
the values of the replaced cables (e.g. conductor cross section).
▪ The circuit board connectors are colour and shape-coded. Do not
force the connector.
▪ Restore the strain relief.
6.4
Changing sensors
Most internal sensors
(Image
6-3) can be replaced without having to
open the boiler control panel.
To remove the boiler cladding, see
Installation and operating instructions
32
(Image
6-2, item 1) and pull out the
(Im-
Chap.
4.10).
Chap.
4.7.1).
Chap.
4.10.
DANGER: RISK OF ELECTROCUTION
Touching live parts can result in an electric shock and lead
to potentially fatal injuries and burns.
▪ Before beginning work on the A2 F, disconnect it from
the power supply (fuse, switch off the main switch) and
secure against unintentional restart.
Image 6-3 Location of the sensors and motors on the boiler (fully
equipped with Smart Start kit mounted)
Item
Designation
tv1
Inflow temperature
sensor (boiler circuit)
t
Internal mixer sensor =
v2
inflow temperature
sensor (heating circuit)
t
Return flow temperat-
R
ure sensor (boiler cir-
cuit)
P
Heating circulation
K
pump
BF
Burner blower
STBK
Safety temperature
limiter
Tab. 6-4
Legend for
Image 6-3
Item
Designation
P
Oil pump
Oil
DS
Pressure sensor
FLS
Flow sensor
3UV
3-way distribution
DHW
valve
3UVB1
3-way mixer valve
Daikin/ROTEX A2 F
Oil condensing boiler A2 F
008.1546499_01 – 03/2018 – EN
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