Worcester 28CDI Manuel de service télécharger pdf (Page 37)

37

Does this fault occur in

only one of the operating

modes? CH or DHW

Replace control board

(Section 16.4.23).

Replace control board

(Section 16.4.23).

Replace control board

(Section 16.4.23).

Replace air pressure

switch (Section 16.4.2).

Note: In the unlikely

event of this not solving

the problem inspect the

pressure pick-up (Venturi)

in the fan.

Repair or replace fan

(Section 16.4.3) or

cable.

Repair or replace fan

(Section 16.4.3) or

cable.

Air pressure switch

is shorting

Replace switch

(Section 16.4.2).

28CDi and 35CDi II

24CDi,28CDi and 35CDi II

Remove fan connector

from board position ST1

and restart boiler in the

fault mode.

After 5 seconds is there

mains 230V from the left

(N) track at ST1 and right

(L) track if DHW mode?

Centre (L) track if CH

mode?

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