Fault
code
on the
display
Const.
weath.-
comp.
System char-
acteristics
Cause
Measures
F8
X
X
Burner in a
fault state
The fuel
valve closes
too late.
Check the gas
train. Check both
control paths.
Press "
E
RESET".
F9
X
X
Burner in a
fault state
Fan speed
too low dur-
ing the burn-
er start
Check the fan,
check the fan
cables and sup-
ply; check the fan
control.
Press "
E
RESET".
FA
X
X
Burner in a
fault state
Fan not at
standstill
Check the fan, fan
connecting cables
and fan control.
Press "
E
RESET".
FC
X
X
Burner in a
fault state
Gas train
faulty or
faulty modu-
lation valve
control; or
flue gas path
blocked
Check the gas
train. Check the
flue gas system.
Press "
E
RESET".
Fd
X
X
Burner in a
fault state
Burner con-
trol unit fault
Check ignition
electrodes and
connecting
cables. Check
whether a strong
interference
(EMC) field exists
near the equip-
ment.
Press "
E
RESET".
Replace control
unit if the fault
persists.
Fault codes
(cont.)
86
Troubleshooting
56
92
682
GB
Содержание Vitodens 333-F
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Страница 119: ...A1 Main PCB A2 Power supply unit Connection and wiring diagram external connections 119 Designs 5692 682 GB ...
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