Operating instructions

Fault code
in the dis-
play
Const. Weat-
h.
comp.
System
character-
istics
Cause Remedy
30 X X Burner
blocked
Boiler temperature
sensor shor ted out
Check the
boiler tem-
perature sen-
sor (see
page 85)
38 X X Boiler temperature
sensor lead break
40 X Mixer
closes
Heating circuit M2
flow temperature
sensor shor ted out
Check the
flow tempera-
ture sensor
48 X Heating circuit M2
flow temperature
sensor lead break
50 X X No DHW
heating
Cylinder tempera-
ture sensor/comfor t
sensor/load ing
sensor shor ted out
Check sen-
sors (see
page 85)
58 X X Cylinder tempera-
ture sensor/comfor t
sensor/load ing
sensor lead break
51 X X No DHW
heating
Cylinder tempera-
ture sensor 2/ outlet
sensor shor ted out
Check sen-
sors (see
page 85)
59 X X Cylinder tempera-
ture sensor 2/ outlet
sensor lead break
92 X X Control
mode
Solar: Collector
temperature sensor
shorted out
Check sensor
9A X X Collector temper a-
ture sensor lead
break
93 X X Control
mode
Solar: Sensor S3
shorted out
Check sensor
9B X X Sensor S3 lead
break
94 X X Control
mode
Solar: Cylinder
temperature sensor
shorted out
Check sensor
Checking and acknowledging faults (cont.)
76
Troubleshooting
5692 548 GB