Viessmann VITODENS 343-F WS4A, Инструкция по установке и обслуживанию

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Fault code
on the dis-
play System character-
istics Cause Measures
b4 Regulates as if the
outside temperature
was 0 °C Internal fault Replace the control unit.
b5 Control mode as per
delivered condition Internal fault Replace the control unit.
b7 Burner blocked. Boiler coding card
missing, faulty or
incorrect boiler
coding card Plug in boiler coding
card or replace it, if
faulty.
bA Mixer M2 continues
to regulate. Communication
fault, extension
kit for mixer cir-
cuit M2 Check the extension kit
connections and coding.
Start the extension kit.
bC Control mode with-
out remote control Communication
fault
– Vitotrol re-
mote control,
heating circuit A1
Check connections,
cable, coding address
"A0" and the remote
control DIP switches.
bd Control mode with-
out remote control Communication
fault, Vitotrol re-
mote control,
heating circuit M2 Check connections,
cable, coding address
"A0" and the remote
control DIP switches.
bE Control mode Vitotrol remote
control incorrectly
programmed Check remote control
DIP switch setting (see
page 126)
bF Control mode Incorrect LON
communication
module Replace the LON com-
munication module.
C2 Control mode Communication
fault, solar control
unit Check connections and
coding address "54".
Cd Control mode Communication
fault Vitocom 100
(KM BUS) Check connections and
the Vitocom 100.
CE Control mode Communication
fault - ext. exten-
sion Check connections and
settings of coding ad-
dress "2E".
CF Control mode Communication
fault, LON com-
munication mod-
ule Replace the LON com-
munication module.
Fault codes
(cont.)
95
Troubleshooting
5592
883
GB
Service