Viessmann VITOPEND 200, Installation And Service Instructions For Contractors

Page: 85 / 132

Fault
code
on the
display Const. Weath.-
comp. System char-
acteristics Cause Measures
dA X Control mode
without room
influence Room tem-
perature
sensor, heat-
ing circuit A1
shorted out Check the room
temperature sen-
sor, heating cir-
cuit A1
db X Control mode
without room
influence Room tem-
perature
sensor, heat-
ing circuit
with mixer
M2 shorted
out Check the room
temperature sen-
sor, heating cir-
cuit with mixer M2
dd X Control mode
without room
influence Room tem-
perature
sensor, heat-
ing circuit A1
lead broken Check the room
temperature sen-
sor, heating cir-
cuit A1 and the
remote control
DIP switch set-
tings (see
page 111)
dE X Control mode
without room
influence Room tem-
perature
sensor, heat-
ing circuit
with mixer
M2 lead bro-
ken Check the room
temperature sen-
sor, heating cir-
cuit with mixer M2
and the remote
control DIP switch
settings (see
page 111)
E4 X X Burner
blocked Fault, supply
voltage 24 V Replace the con-
trol unit
E5 X X Burner
blocked Fault, flame
amplifier Replace the con-
trol unit.
E6 X X Burner in a
fault state Balanced
flue system
blocked Check the ba-
lanced flue sys-
tem and air
pressure switch;
press
"
E RESET"
Fault codes
(cont.)
85
Troubleshooting
5592
817
GB
Service