41
Troubleshooting
Faults which are displayed at the programming unit
(cont.)
Fault
code
System
characteristics
Cause
Remedy
c7
Control mode
Heating circuit pump
incorrectly encoded
Check coding address
E5 and heating circuit
pump DIP switch
settings
c9
Active fault message
input at control
module V
Check device
connected to fault
message input
cd
Communication fault
Vitocom 100
Check connections
and Vitocom 100.
Without Vitocom100:
Set code 95:0
cEe
Communication fault
Control module V
Check connections
and control module V
Without control
module V:
Set code 94:0
d1
Boiler cools down
Burner fault
Check burner
dEa
Control mode
without room
influence
Short circuit
Room temperature
sensor,
heating circuit A1
Check room
temperature sensor
(see page73) and the
DIP switch on Vitotrol
dEb
Short circuit
Room temperature
sensor,
mixer circuit M2
(see pages68 and 70)
dEd
Lead broken
Room temperature
sensor,
heating circuit A1
dEe
Lead broken
Room temperature
sensor,
mixer circuit M2
5862700GB