Viessmann Vitodens 200 Service Instructions Manual page 77

Fault codes
(cont.)
Display Const. Weath.-
fault comp.
code
Fd X X
FE X X
FF X X
System char- Cause
acteristics
Burner Fault at the
blocked burner con-
trol unit
Burner Strong inter-
blocked or in a ference
fault state (EMC) field
nearby, or
faulty main
PCB
Burner Strong inter-
blocked or in a ference
fault state (EMC) field
nearby, or in-
ternal fault
Troubleshooting
Measures
Check the ignition
electrodes and
connecting
cables/leads;
check whether
there are strong
interference
(EMC) fields near
the equipment;
press "E" . If fault
is not removed,
replace control
unit
Start the equip-
ment again. Re-
place the control
unit if the equip-
ment will not re-
start.
Start the equip-
ment again. Re-
place the control
unit if the equip-
ment will not re-
start.
77