Front panel
FIGHTER 1240
4
Switch
with three positions 1 - 0 - :
1 Normal mode. All control functions connect-
ed.
0 Boiler completely switched off.
Standby. Only the circulation pump and
immersion heater step 2 are operational.
The switch must not be turned to 1 or “ ”
before filling the boiler with water.
Display
Switch
Left
keypad
Heating
curve offset
Display
First row:
Compressor symbol
Indicates when the compressor is opera-
tional.
Supplement symbol
Indicates when immersion heater is con-
nected. The line indicates which power
step/steps are currently connected.
I Step 1 is connected.
II Step 2 is connected.
I II Steps 1+2 are connected.
Layout
B
A
D
E
Right
keypad
Hot water symbol
Tap is shown when the heat pump charges
the hot water.
A is shown when a temperature increase is
in progress.
B is shown when a time based temperature
increase is in progress, for example, peri-
odic.
Circulation pump symbol
I Shown when the circulation pump is
operational.
II Shown when circulation pump 2 is oper-
ational (the accessory ESV 21 is
required).
Heating system symbols
Shown when house heating is in progress.
Second row: Value of the current parameter.
Third row: Description of current display parame-
ter. Hot water temp is normally shown.
F
B
Explanation
A