Viessmann VITOPEND 200 Installation And Service Instructions Manual page 86

Troubleshooting
Fault codes
(cont.)
Display Const. Weath.‐
fault comp.
code
F9 X X
FA X X
FC X X
Fd X X
FE X X
86
System char- Cause
acteristics
Burner control Fan speed
unit fault too low dur-
ing burner
start
Burner control Fan not at
unit fault standstill
Burner control Modulation
unit fault valve control
faulty
Burner Burner con-
blocked trol unit fault
Burner Strong inter-
blocked ference
(EMC) field
nearby,
faulty boiler
coding card
or main PCB
Remedy
Check the fan, fan
connecting
cables, fan power
supply and con-
trol; press "E"
Check fan, fan
connecting cables
and fan control;
press "E"
Check modulation
valve control
Check the ignition
electrodes and
connecting
cables/leads;
check whether
there are strong
fields of interfer-
ence (EMC) near
the equipment;
press "E". Re-
place the control
unit if the fault
persists
If equipment will
not restart, re-
move the EMC
field, check the
boiler coding card
and replace it or
the control unit, if
required