84
Fault code
displayed
Const.
Weather-
comp.
System characteris-
tics
Cause
Measures
b5
X
X
Control mode as per
delivered condition
Internal fault
Replace the control unit
b7
X
X
Burner blocked
Boiler coding card
fault
Plug in or replace the boil-
er coding card.
b8
X
X
Burner blocked
Lead break, flue
gas temperature
sensor
Check the flue gas tem-
perature sensor (see
page 94).
bA
X
Mixer regulates to
20 °C flow tempera-
ture.
Communication er-
ror, extension kit
for heating circuit 2
(with mixer)
Check the extension kit
connections and coding
bb
X
Mixer regulates to
20 °C flow tempera-
ture.
Communication er-
ror, extension kit
for heating circuit 3
(with mixer)
Check the extension kit
connections and coding
bC
X
Control mode without
remote control
Communication er-
ror, Vitotrol remote
control, heating cir-
cuit 1 (without mix-
er)
Check connections, ca-
ble, coding address "A0"
in group
"Heating cir-
cuit..."
/
5
and remote con-
trol configuration (see
page 132).
For wireless remote con-
trols: Check connection,
place remote control unit
close to the boiler.
bd
X
Control mode without
remote control
Communication er-
ror, Vitotrol remote
control, heating cir-
cuit 2 (with mixer)
Check connections, ca-
ble, coding address "A0"
in group
"Heating cir-
cuit..."
/
5
and remote con-
trol configuration (see
page 132).
For wireless remote con-
trols: Check connection,
place remote control unit
close to the boiler.
bE
X
Control mode without
remote control
Communication er-
ror, Vitotrol remote
control, heating cir-
cuit 3 (with mixer)
Check connections, ca-
ble, coding address "A0"
in group
"Heating cir-
cuit..."
/
5
and remote con-
trol configuration (see
page 132).
For wireless remote con-
trols: Check connection,
place remote control unit
close to the boiler.
bF
X
Control mode
Incorrect LON
communication
module
Replace LON communi-
cation module
C1
X
X
Control mode
Communication er-
ror, EA1 extension
Check connections
Without EA1 extension:
Set code "5b:0" in group
"General"
/
1
.
Troubleshooting
Fault codes
(cont.)
5773 216 GB
Diagnosis
Содержание B2TA
Страница 12: ...12 2 5 1 4 2x 3 Fig 5 Installing the boiler Removing the front panels 5773 216 GB Installation ...
Страница 13: ...13 1 2 SW17 Fig 6 Installing the boiler Siting and levelling the boiler 5773 216 GB Installation ...
Страница 23: ...23 4 1 5 2 2x 3 Fig 16 Installing the boiler Fitting the front panels 5773 216 GB Installation ...
Страница 101: ...101 Parts lists Overview of assemblies 5773 216 GB Components ...
Страница 107: ...107 Parts lists Hydraulics 5773 216 GB Components ...
Страница 118: ...118 0004 0002 0005 0006 0001 0003 Fig 77 Parts lists Miscellaneous 5773 216 GB Components ...
Страница 142: ...142 5773 216 GB ...
Страница 143: ...143 5773 216 GB ...