Fault
code
on the
display
Const.
weath.-
comp.
System char-
acteristics
Cause
Measures
FE
X
X
Burner
blocked or in a
fault state
Boiler coding
card or main
PCB faulty
Press "
E
RESET". Replace
boiler coding card
or control unit if
the fault persists
FF
X
X
Burner
blocked or in a
fault state
Internal fault
or "
E
RESET" key
blocked
Start the equip-
ment again. Re-
place the control
unit if the equip-
ment will not re-
start.
Repairs
Checking the outside temperature sensor (weather-compen-
sated control unit)
1.
Pull plug "X3" from the control unit.
Fault codes
(cont.)
87
Troubleshooting
56
92
682
GB
Summary of Contents for Vitodens 333-F
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