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Appendix
A
Troubleshooting, maintenance message
A.1
Troubleshooting
Symptom
Display remains dark
No changes in the display can
be made via the control ele-
ments
Display: Button lock activated,
it is not possible to change the
settings or values
Display: Mode: Back-up boiler
if fault occurs Heat pump (call
the comp. person), insufficient
heating-up of the heating and
the domestic hot water
Display: F. Boiler fault, the
specific fault code (e.g. F.33)
with the specific boiler is shown
in the display
Display: You do not understand
the set language
A.2
Maintenance messages
#
Code/meaning
Description
1
Water defi-
The water pressure is too low in
ciency: Follow
the heating installation.
the instructions
in the heat gen.
B
-- Troubleshooting, maintenance message
B.1
Troubleshooting
Symptom
Display remains dark
No changes in the display can
be made via the control ele-
ments
48
Possible cause
Software error
Software error
Button lock is active
Heat pump does not work
Boiler fault
Incorrect language set
Maintenance work
Refer to the operating instruc-
tions for the relevant heat gen-
erator for information on filling
with water
Possible cause
Software error
No power supply on the heat
generator
The product is defective
Software error
The product is defective
Measure
1.
Press and hold the button on the top right of the system con-
trol for longer than five seconds in order to force a restart.
2.
Switch off the mains switch on all heat generators for approx.
1 minute and then switch them on again.
3.
If the fault message persists, inform the competent person.
1.
Press and hold the button on the top right of the system con-
trol for longer than five seconds in order to force a restart.
2.
Switch off the mains switch on all heat generators for approx.
1 minute and then switch them on again.
3.
If the fault message persists, inform the competent person.
▶
Press the button on the top right of the system control for ap-
prox one second in order to deactivate the button lock.
1.
Inform the competent person.
2.
Select the setting for limp home mode until the competent
person arrives.
3.
You can find more detailed explanations under Faults, fault
messages and maintenance messages (→ Chapter 6).
1.
Reset the boiler by first selecting Reset and then Yes.
2.
If the fault message persists, inform the competent person.
1.
Press
twice.
2.
Select the last menu item (
pressing
.
3.
Under
SETTINGS, select the second menu item and
confirm by pressing
4.
Select the language that you understand and confirm by
pressing
.
Measure
1.
Press and hold the button on the top right of the system con-
trol for longer than five seconds in order to force a restart.
2.
Switch the mains switch on the heat generator that feeds the
system control off and back on again.
▶
Re-establish the power supply to the heat generator; this is the
same power supply that feeds the system control.
▶
Replace the product.
▶
Switch the mains switch on the heat generator that feeds the
system control off and back on again.
▶
Replace the product.
Operating and installation instructions sensoCOMFORT 0020287900_01
SETTINGS) and confirm by
.
Interval
See the operating instructions
for the heat generator
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