88
Fault number
on the display
System characteristics
Cause
Measures
F.543
Mixer closes. Heating circuit
pump is operational.
Short circuit, flow temper-
ature sensor for heating
circuit 1 with mixer
Check flow temperature sensor
TS1 on extension kit mixer (ADIO
electronics module). See
page 91.
F.544
Mixer closes. Heating circuit
pump is operational.
Lead break, flow tempera-
ture sensor, heating circuit
2 with mixer
Check flow temperature sensor
TS1 on extension kit mixer (ADIO
electronics module). See
page 91.
F.545
Mixer closes. Heating circuit
pump is operational.
Short circuit, flow temper-
ature sensor for heating
circuit 2 with mixer
Check flow temperature sensor
TS1 on extension kit mixer (ADIO
electronics module). See
page 91.
F.546
Mixer closes. Heating circuit
pump is operational.
Lead break, flow tempera-
ture sensor, heating circuit
3 with mixer
Check flow temperature sensor
TS1 on extension kit mixer (ADIO
electronics module). See
page 91.
F.547
Mixer closes. Heating circuit
pump is operational.
Short circuit, flow temper-
ature sensor for heating
circuit 3 with mixer
Check flow temperature sensor
TS1 on extension kit mixer (ADIO
electronics module). See
page 91.
F.574
Control mode without room
influence
Room temperature sensor
for heating circuit 1 not
available
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
F.575
Control mode without room
influence
Lead break, room temper-
ature sensor, heating cir-
cuit 1
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
F.576
Control mode without room
influence
Short circuit, room tem-
perature sensor, heating
circuit 1
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
F.577
Control mode without room
influence
Room temperature sensor
for heating circuit 2 not
available
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
F.578
Control mode without room
influence
Lead break, room temper-
ature sensor, heating cir-
cuit 2
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
F.579
Control mode without room
influence
Short circuit, room tem-
perature sensor, heating
circuit 2
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
F.580
Control mode without room
influence
Room temperature sensor
for heating circuit 3 not
available
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
F.581
Control mode without room
influence
Lead break, room temper-
ature sensor, heating cir-
cuit 3
Check external room temperature
sensor for heating circuit or room
temperature sensor for remote
control unit.
Troubleshooting
Fault messages
(cont.)
6130884
Service