Fault code
in the dis-
play
Const.
Weat-
h.
comp.
System
character-
istics
Cause
Remedy
F7
X
X
Burner
blocked
Differential pres-
sure sensor faulty
Check the dif-
ferential pres-
sure sensor
and lead.
F8
X
X
Burner in
fault state
Fuel valve closes
too late
Check gas
combination
valve. Check
both control
paths.
Press
E
.
F9
X
X
Burner in
fault state
Fan speed too low
at burner start
Check the
fan, check the
fan cables
and supply,
check the fan
control.
Press
E
.
.
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.
Checking and acknowledging faults
(cont.)
82
Troubleshooting
56
92
548
GB
Содержание VITODENS 333
Страница 114: ...Parts lists cont 114 Parts lists 5692 548 GB ...
Страница 115: ...Parts lists cont 115 Parts lists 5692 548 GB ...
Страница 116: ...Parts lists cont 116 Parts lists 5692 548 GB ...
Страница 117: ...Parts lists cont 117 Parts lists 5692 548 GB ...
Страница 118: ...Parts lists cont 118 Parts lists 5692 548 GB ...
Страница 119: ...Parts lists cont 119 Parts lists 5692 548 GB ...
Страница 131: ...131 5692 548 GB ...