
79
Fault
code on
the dis-
play
Const.
weath.-
comp.
System char-
acteristics
Cause
Measures
dd
X
Control mode
without room
influence
Room tem-
perature sen-
sor, heating
circuit A1 lead
broken
Check the room
temperature sen-
sor, heating circuit
A1 and the remote
control DIP switch
settings (see
page 104)
dE
X
Control mode
without room
influence
Room tem-
perature sen-
sor, heating
circuit with
mixer M2 lead
broken
Check the room
temperature sen-
sor, heating circuit
with mixer M2 and
the remote control
DIP switch settings
(see page 104)
E4
X
X
Burner blocked Supply volt-
age fault
Replace the control
unit
E5
X
X
Burner blocked Internal fault
Check the ionisa-
tion electrode and
cables. Check the
flue gas system for
tightness.
Press "
E
RESET"
E6
X
X
Burner blocked System pres-
sure too low.
Minimum sys-
tem pressure,
see page 8.
Top up with water
E8
X
X
Burner in a fault
state
The ionisa-
tion current
lies outside
the permissi-
ble range
Check the ionisa-
tion electrode and
cable.
Press "
E
RESET"
Troubleshooting
Fault codes
(cont.)
5692 760 GB
Summary of Contents for VITOCONTROL-S, WB2B
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