Technical information

PRELIMINARY CHECKS
MAKE SURE THAT:
IS
THE POWER
DISPLAY
ON?
POSTION
OF THE
SELECTOR
NO
NO
WINTERES TAT E
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
TURN ON THE ON/OFF
SWITCH
IS D.H.W.
BEING DRAWN?
IS D.H.W.
BEING DRAWN?
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active 
(flow temp between 3C & 8C)
-PC0 continuous pump
operation selected on 
menu (see page 32)
MUST
TIME CLOCK
AND/OR ROOM
THERMOSTAT
BE ACTIVATED?
A
ECONOMY/
COMFORT
SELECTOR
TEMP.
C.H. < 42
°C
Comfort
Comfort
Economy
Economy
1 - There is sufficient water in 
the system
2 - The gas is turned on 
3 - The electrical supply is
turned on
1 - Check/reset system
pressure
2 - Check/restore gas
supply
3 - Check/replace short-
circuited heating probe
4 - Check/replace siezed
pump
1 - Check/reset the
system pressure
2 - Check/restore
gas supply
3 - Check/replace short-
circuited heating probe
4 - Check/replace
siezed pump
TEMP.
C.H. < 42°C
ECONOMY/
COMFORT
SELECTOR
YES
DOES AN ERROR CODE
APPEAR ON THE DISPLAY?
1. Check the fuses
2. Check the power supply to
the control panel
3. Check/replace the
ON/OFF button
4. Check the connection between
the main and display P.C.B.s
see section 3.6
5. Check/replace the
main and display P.C.B.s
BUILT-IN
ELECTRONIC
ANTI-FROST DEVICE:
Is there a condition for it to be active 
(flow temp between 3C & 8C)
-PC0 continuous pump
operation selected on 
menu (see page 32)
FI
G
. 6.91
D4
D4
FI
G
. 6.92
6.6.3 Removing the time clock
1. Disconnect the electrical connections “D5” from the
c
lock (F
IG.
6.93);
2. Remove screws “D6” (FIG. 6.93);
3. Lift out the time clock from the control panel (FI
G
. 6.94).
FI
G
. 6.93
FIG. 6.94
D5
D6