Viessmann Vitodens 100 Installation And Service Instructions Manual page 62

Troubleshooting
Fault finding
(cont.)
Display fault
code
Fd
FE
62
System char- Cause
acteristics
Burner Burner control unit
blocked fault
Burner Faulty main PCB
blocked
Remedy
Check the ignition elec-
trodes and leads. Check
whether a strong interfer-
ence (EMC) field exists
near the equipment.
Press"Reset".
If the fault is not re-
moved, replace the con-
trol unit.
Switch OFF the control
unit, if the equipment will
not restart.