48
Does pump run?
Does the yellow ignition
indicator ( ) flash after 30s?
Has system been
filled with water?
Does bur
ner light?
Check operation of pump
Sheet D
Does the yellow ignition
indicator ( ) flash after 30s?
Tu
rn
boiler on/off control
switch off, then on again.
Check maximum radiator
temperature control is set high
enough (e. g. 9).
Does the pump run now?
Is 230 V present at the pump
plug connection (X10) on the
electronic boards?
Replace electronic boards.
Check pump, replace as
necessar
y.
Ye
s
Ye
s
No
No
Ye
s
No
No
No
No
Ye
s
Go to sheet H.
Go to sheet E.
Fill and vent
system.
No
Go to sheet F
.
Ye
s
Ye
s
Ye
s
