Ariston EURO COMBI A/23 MFFI Servicing Instructions - Page 19

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B029

N.B.

It is possible to by-pass the time clock in the event of failure by simply

unplugging the electrical connection from the P.C.B. (see fig. 1.48 ). This will

revert control of the central heating to the room stat connection on the reverse

of the control panel.

Fig. 1.53

Fig. 1.54

Removing the P.C.B.s

1. Isolate electricity;

2. Remove the front cover of the boiler;

3. Remove the inspection panel (see fig. 1.6-1.7 );

5. Remove the mounting screws "A6' (see fig. 1.53) ;

6. Disconnect the connection cable"A7" (see fig. 1.54) ;

7. To remove the 24V P.C.B.: remove the electrical plug

connectors and screws "A8" (see fig. 1.55) ;

8. To remove the 240V P.C.B.: remove the electrical plug

connectors and screws "A9" (see fig. 1.56) ;

9. Replace either P.C.B. in reverse order.

Fig. 1.55

Fig. 1.56