Fault
code
on the
display
Const.
weath.-
comp.
System char-
acteristics
Cause
Measures
A9
X
The burner op-
erates at its
lower output if
a heating cir-
cuit with mixer
is connected.
The burner is
blocked if only
one heating
circuit without
mixer is con-
nected.
Internal cir-
culation
pump
blocked
Check the circula-
tion pump
b0
X
X
Burner
blocked
Flue gas
temperature
sensor
shorted out
Check the flue
gas temperature
sensor
b1
X
X
Control mode
as per deliv-
ered condition
Communica-
tion error,
program-
ming unit
Check connec-
tions and replace
the programming
unit, if required
b4
X
X
Regulates as
if the outside
temperature
was 0 °C
Internal fault
Replace the con-
trol unit
b5
X
X
Control mode
as per deliv-
ered condition
Internal fault
Replace the con-
trol unit
b7
X
X
Burner
blocked
Boiler coding
card fault
Plug in boiler cod-
ing card or re-
place, if faulty
b8
X
X
Burner
blocked
Flue gas
temperature
sensor lead
broken
Check the flue
gas temperature
sensor
bA
X
Mixer M2 reg-
ulates to a
flow tempera-
ture of 20 °C.
Communica-
tion fault
–
extension kit
for heating
circuit M2
Check the exten-
sion kit connec-
tions and coding.
Start the exten-
sion kit.
Fault codes
(cont.)
80
Troubleshooting
56
92
682
GB
Содержание Vitodens 333-F
Страница 5: ...Keyword index 133 Index cont 5 Index 5692 682 GB ...
Страница 119: ...A1 Main PCB A2 Power supply unit Connection and wiring diagram external connections 119 Designs 5692 682 GB ...
Страница 123: ...Parts lists cont 123 Parts lists 5692 682 GB ...
Страница 124: ...Parts lists cont 124 Parts lists 5692 682 GB ...
Страница 125: ...Parts lists cont 125 Parts lists 5692 682 GB ...
Страница 126: ...Parts lists cont 126 Parts lists 5692 682 GB ...
Страница 127: ...Parts lists cont 127 Parts lists 5692 682 GB ...
Страница 128: ...Parts lists cont 128 Parts lists 5692 682 GB ...
Страница 135: ...Keyword index cont 135 Keyword index 5692 682 GB ...