MAINTENANCE INSTRUCTIONS
52
Modulation circuit board
(see fig. 1-2)
•
Open the control panel (see 6.3 “Accessing the
boiler”);
•
Disconnect all the connectors, remove the
regulating knobs, unscrew the four fixing screws and
remove the modulation circuit board;
•
Replace the circuit board and re-assemble the
components following the above procedure in
reverse order;
•
Switch on the electricity, water and gas supplies
and regulate the boiler (see 5.3 “Gas data”);
When replacing the modulation circuit
board, it’s necessary to set parameter P00
according to the boiler model (24-28-29-34-
50).
modulation circuit board
Fig. 1
Fig. 2
modulation circuit board
