Technical data

48
Does pump run?
Does the yellow ignition indicator ( ) flash after 30s?
Has system been filled with water?
Does burner light?
Check operation of pump
Sheet D
Does the yellow ignition indicator ( ) flash after 30s?
Turn 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 necessary.
Yes
Yes
No
No
Yes
No
No No
No
Yes
Go to sheet H.
Go to sheet E.
Fill and vent system.
No
Go to sheet F.
Yes
Yes
Yes