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• Insert two new Mignon/AA batteries into the valve operating mechanism’s battery compart-
ment, making sure that the polarity is correct. Otherwise you may destroy the valve operating
mechanism’s electronic components!
• The display shows ‘
C1
C1
C1
C1
C1
’
followed by a 2-digit number. The display then shows ‘
C2
C2
C2
C2
C2
’, followed
by another 2-digit number (both numbers are the currently stored security code of the valve
operating mechanism)
.
• A signal tone is then generated and ‘
A1
A1
A1
A1
A1
’ is displayed.
• The valve operating mechanism now fully retracts the control pin.
• ‘
A2
A2
A2
A2
A2
’ is then displayed.
• Briefly press the button on the valve operating mechanism.
• ‘
A3
A3
A3
A3
A3
’ is displayed and the valve operating mechanism closes the valve completely.
• The antenna symbol then blinks and ‘
0%
0%
0%
0%
0%
’ is displayed.
• The first radio signal that is received is acknowledged by a signal tone, and the antenna
symbol is permanently displayed.
• Replace the battery compartment cover.
c) ‘FHT80TF-2’ door/window contact sensor
When the batteries in the door/window contact sensor are low, the device sends this
information to the heating control. The corresponding error message (the window icon ‘ ’
blinks) is shown on the heating control’s display.
You can use the ‘
FEn
FEn
FEn
FEn
FEn
’ special function menu to identify the door/window contact sensor
whose batteries are low.
To replace the batteries, proceed as follows:
• Open the casing by pushing the two catches on the left side of the casing approx. one
millimetre inwards using a flat screwdriver while simultaneously pulling the lid forwards.
• Remove both of the old batteries and dispose of them according to the applicable environ-
mental regulations. See section 18.
• Insert 2 new AAA batteries into the battery compartment, observing the correct polarity.
• Close the casing cover.
• If necessary, the door/window contact sensor now conducts a synchronisation procedure
that lasts approx. 1 minute (the LED blinks every second).