5 Troubleshooting
12 Operating instructions Energy
7
0020300878_00
4.8 Product settings
Note
The sequence in which the avail-
able settings are shown depends
on the operating mode selected.
If the Domestic hot water + Heat-
ing operating mode is selected, the
domestic hot water temperature
must be confirmed in order to set
the flow temperature of the heat-
ing.
1. Press the or button to set the
temperature.
2. Press the button to confirm.
4.9 Switching the product to
standby mode
▶ Press the button for less than three
seconds.
◁ Once the requirement currently in
use has finished, the display will
show OFF and go out.
◁ The product is now in standby mode.
◁ The product's frost protection func-
tion is activated.
◁ The main power supply is not inter-
rupted. The product continues to be
supplied with power.
5 Troubleshooting
5.1 Detecting and eliminating
faults
▶ If problems occur whilst operating the
product, you can carry out certain self-
checks with the aid of the table in the
appendix.
Troubleshooting (→ Page 14)
▶ If the product still does not function
without problems after the checks have
been carried out using the table, con-
tact your competent person to rectify
the problem.
5.2 Fault codes in the display
Fault codes have priority over all other dis-
plays. If several faults occur at the same
time, the corresponding codes are dis-
played alternately for two seconds each.
▶ If your product displays a fault code
(F.xx), contact a competent person.
6 Care and maintenance
6.1 Maintenance
An annual inspection of the product carried
out by a competent person is a prerequis-
ite for ensuring that the product is perman-
ently ready and safe for operation, reliable,
and has a long working life.
6.2 Caring for the product
▶ Clean the casing with a damp cloth and
a little solvent-free soap.
▶ Do not use sprays, scouring agents,
detergents, solvents or cleaning agents
that contain chlorine.
6.3 Checking the condensate
discharge pipe and tundish
The condensate discharge pipe and tun-
dish must always be penetrable.
▶ Regularly check the condensate dis-
charge pipe and tundish for faults and,
particularly, for blockages.
You must not be able to see or feel any
obstructions in the condensate discharge
pipe and tundish.
▶ If you notice a fault, have it eliminated
by a competent person.
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