Displayed
fault code
Const.
Weat-
her-
comp.
System
character-
istics
Cause
Remedy
FA
X
X
Burner in
fault state
Fan speed too high
at burner start
Check the
fan, check the
fan cables,
check the fan
control.
Press
E
.
Fd
X
X
Burner
blocked
Burner control unit
fault
Check the
ignition elec-
trodes and
leads. Check
whether a
strong inter-
ference
(EMC) field
exists near
the equip-
ment.
Press
E
.
If the fault is
not removed,
replace the
control unit.
FE
X
X
Burner
blocked
Strong interference
(EMC) field nearby;
alternatively boiler
coding card or
main PCB faulty
Remove EMC
interference.
If the equip-
ment will not
restart, check
the boiler
coding card
and replace,
or replace the
control unit.
Checking and acknowledging faults
(cont.)
84
Troubleshooting
56
92
550
GB
Содержание VITODENS 300 WB3A
Страница 10: ...Opening the control unit housing 10 5862 570 GB...
Страница 14: ...Closing control unit housing and inserting user interface 14 5862 570 GB...
Страница 122: ...Temperature profile Factory set code F1 6 to F1 15 Control functions cont 106 Function description 5692 550 GB...
Страница 125: ...A1 Main PCB A2 Mains supply unit Connection and wiring diagrams external connections 109 Designs 5692 550 GB...
Страница 129: ...Parts lists cont 113 Parts lists 5692 550 GB...
Страница 130: ...Parts lists cont 114 Parts lists 5692 550 GB...
Страница 131: ...Parts lists cont 115 Parts lists 5692 550 GB...
Страница 132: ...Parts lists cont 116 Parts lists 5692 550 GB...
Страница 133: ...Parts lists cont 117 Parts lists 5692 550 GB...
Страница 145: ...129 5692 550 GB...
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