Appendix
0020288229_00 MiSet Operating and installation instructions 21
A.2 Maintenance messages
# Message Description Maintenance work Interval
1 Water defi-
ciency: Fol-
low the in-
structions
in the heat
gen.
The water pressure is
too low in the heating
installation.
Refer to the operat-
ing instructions for the
relevant heat gener-
ator for information on
filling with water
See the operating
instructions for the
heat generator
B -- Troubleshooting, maintenance message
B.1 Troubleshooting
Symptom Possible cause Measure
Display remains dark Software error 1. Press and hold the button on the top right
of the system control for longer than five
seconds in order to force a restart.
2. Switch the mains switch on the heat gen-
erator that feeds the system control off and
back on again.
No power supply on
the heat generator
▶ Re-establish the power supply to the heat
generator; this is the same power supply
that feeds the system control.
The product is defect-
ive
▶ Replace the product.
No changes in the
display can be made
via the control ele-
ments
Software error ▶ Switch the mains switch on the heat gen-
erator that feeds the system control off and
back on again.
The product is defect-
ive
▶ Replace the product.
Heat generator contin-
ues to heat once the
room temperature has
been reached
Incorrect value in the
Room temp. mod.:
or Zone assignment:
function
1. In the Room temp. mod.: function, set the
value Active or Expanded.
2. In the zone in which the system control
is installed, assign the system control's
address in the Zone assignment: function.
The heating install-
ation remains in do-
mestic hot water mode
Heat generator cannot
reach the max. target
flow temperature
▶ Reduce the set value in the Max. target
flow temperature:°C function.
It is not possible to
switch to the installer
level
You do not know the
code for the installer
level
▶ Reset the system control to the factory set-
ting. All set values will be lost.
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