Operating instructions

Fault code
in the dis-
play
Const. Weat-
h.
comp.
System
character-
istics
Cause Remedy
FE X X Burner
blocked
Strong interference
(EMC) field nearby;
alternatively boiler
coding card or
main PCB faulty
Remove EMC
interference.
If the equip-
ment will not
restart, check
the boiler
coding card
and replace ,
or replace the
control unit.
FF X X Burner
blocked
Internal error R emove EMC
interference.
If the equip-
ment will not
restart, check
the boiler
coding card
and replace ,
or replace the
control unit.
Checking and acknowledging faults (cont.)
83
Troubleshooting
5692 548 GB