Fault
code
on the
display
Const.
Weath.-
comp.
System char-
acteristics
Cause
Measures
F9
X
X
Burner in a
fault state
Fan speed
too low dur-
ing burner
start
Check the fan, fan
connecting
cables, fan power
supply and con-
trol; press "
E
"
FA
X
X
Burner in a
fault state
Fan not at
standstill
Check the fan, fan
connecting cables
and fan control;
press "
E
"
Fd
X
X
Burner
blocked
Fault at the
burner con-
trol unit
Check the ignition
electrodes and
connecting
cables/leads;
check for any
strong interfer-
ence (EMC) field
near the equip-
ment; press "
E
".
Replace the con-
trol unit if the fault
persists
FE
X
X
Burner
blocked or in a
fault state
Strong inter-
ference
(EMC) field
nearby, or
faulty main
PCB
Start the equip-
ment again. Re-
place the control
unit if the equip-
ment will not re-
start.
FF
X
X
Burner
blocked or in a
fault state
Strong inter-
ference
(EMC) field
nearby, or in-
ternal fault
Start the equip-
ment again. Re-
place the control
unit if the equip-
ment will not re-
start.
Fault codes
(cont.)
81
Troubleshooting
5692
731
GB
Summary of Contents for VITODENS 333-F WS3A
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