Viessmann VC3, Инструкция по эксплуатации

Страница: 67 / 112

Fault code
on the dis-
play System character-
istics Cause Measures
b7 Burner blocked. Boiler coding card
missing, faulty or
incorrect boiler
coding card Plug in boiler coding
card or replace it, if
faulty.
b8 Burner blocked Flue gas tem-
perature sensor
lead broken Check the flue gas tem-
perature sensor (see
page 74).
bA Mixer M2 regulates
to a flow tempera-
ture of 20 °C. Communication
fault
– extension
kit for heating 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 settings (see
page 86).
bF Control mode Incorrect LON
communication
module Replace the LON com-
munication module.
C2 Control mode KM BUS connec-
tion lead broken
to solar heating
control unit Check the KM BUS, the
solar heating control unit
and coding address
"54".
C6 Control mode, max.
pump speed Communication
fault, variable
speed circulation
pump, heating
circuit M2 Check the setting of
coding address "E5".
C7 Control mode, max.
pump speed Communication
fault, variable
speed circulation
pump, heating
circuit A1 Check the setting of
coding address "E5".
Fault codes
(cont.)
67
Troubleshooting
5692
745
GB