Viessmann Vitotronic 200 KW2 Installation And Service Instructions Manual page 41

Faults which are displayed at the programming unit
Fault
System
code
characteristics
c7 Control mode
c9
cd
cE e
Boiler cools down
d1
Control mode
dE a
without room
influence
dE b
dE d
dE e
Cause
Heating circuit pump
incorrectly encoded
Active fault message
input at control
module V
Communication fault
Vitocom 100
Communication fault
Control module V
Burner fault
Short circuit
Room temperature
sensor,
heating circuit A1
Short circuit
Room temperature
sensor,
mixer circuit M2
Lead broken
Room temperature
sensor,
heating circuit A1
Lead broken
Room temperature
sensor,
mixer circuit M2
Troubleshooting
(cont.)
Remedy
Check coding address
E5 and heating circuit
pump DIP switch
settings
Check device
connected to fault
message input
Check connections
and Vitocom 100.
Without Vitocom 100:
Set code 95 : 0
Check connections
and control module V
Without control
module V:
Set code 94 : 0
Check burner
Check room
temperature sensor
(see page 73) and the
DIP switch on Vitotrol
(see pages 68 and 70)
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