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56 | Troubleshooting
Information displayed (
Text
Fault 21
System configuration: new BUS device
Fault 22
System configuration: BUS device missing
Fault 23
System configuration: BUS device changed
or replaced
Fault 24
System configuration: incompatible BUS
device
Fault 28
Remote control is fitted on heat source
Fault 29
Unable to save parameter settings
Fault 30
Mixer temperature sensor faulty
Fault 31
External CH flow temperature sensor faulty
Fault 32
Cylinder temperature sensor faulty
Fault 33
Temperature sensors incorrectly
connected
Fault 34
Temperature sensors connected and mode
of operation do not match
Fault 40
Temperature sensor T1 on collector
group 1 faulty
Fault 41
Temperature sensor T2 at bottom of solar
cylinder faulty
6 720 800 844 (2012/02)
items 1, 3 and 4 in Fig. 25)
Code Cause
135
137
139
178
179
159
119
155
202
7
6
8
20
21
22
23
101
102
103
104
See display text on remote control.
IPM not recognised on remote
control with code 1.
System configuration on
remote control for heating
circuit 1 and IPM connections
for heating circuit 1 not
permissible.
See display text on remote control.
Remote control fitted inside
heating appliance.
BUS subscriber configured but
not available at present.
Mixer temperature sensor (MF)
connected to IPM faulty.
Common temperature sensor
(VF) connected to the IPM
faulty.
Cylinder temperature sensor
(SF) connected to the IPM
faulty.
Cylinder temperature sensor
(SF) and mixer temperature
sensor (MF) are connected to
the IPM.
Two common temperature
sensors (VF) are connected to
the IPM.
Temperature sensor connected
to IUM.
Temperature sensor connected
to IPM and associated
operating mode do not match.
Short circuit on sensor lead
(T
).
1
Break in sensor lead (T
).
1
Short circuit on sensor lead
(T
).
2
Break in sensor lead (T
).
2
Remedy (by contractor)
Check IPM connection and
code and adjust if required.
Check system configuration for
heating circuit 1 and IPM
connections for heating
circuit 1.
Install remote control in living
space.
Check system structure, check
system configuration, adjust as
necessary and reset
parameters on remote control.
Check mixer temperature
sensor (MF) and replace if
necessary.
Check common temperature
sensor (VF) and replace if
required.
Check cylinder temperature
sensor (SF) and replace if
required.
Remove one of the
temperature sensors
(SF or MF).
Remove one of the common
temperature sensors (VF).
Remove temperature sensor
and insert a coding plug if
necessary.
Check temperature sensor and
associated operating mode
and adjust if necessary.
Check temperature sensor (T
and replace if necessary.
Check temperature sensor (T
and replace if necessary.
)
1
)
2
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Table of Contents
Troubleshooting
