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5 Troubleshooting
14 Operating instructions ecoTEC pure 0020258017_00
4.9 Protecting the heating
installation against frost
4.9.1 Frost protection function
Caution.
Risk of material damage due
to frost.
The frost protection function
cannot guarantee flow through
the entire heating installation,
which means that parts of the
heating installation may freeze
and therefore become dam-
aged.
During a period of frost, en-
sure that the heating installa-
tion remains in operation and
that all rooms are sufficiently
heated, even when you are
away.
To keep the frost protection devices active,
you should switch your product on and off
using the controller, if one is provided.
If the heating flow temperature falls be-
low 5 °C when the on/off button is on, the
product comes into operation and heats
the circulating water to approx. 30 °C on
both the heating side and the hot water
side (if available).
4.9.2 Draining the heating
installation
When the unit is switched off for an exten-
ded period, frost protection can be guar-
anteed by completely draining the heating
installation and the product.
Consult a competent person about this.
5 Troubleshooting
5.1 Detecting and rectifying faults
If faults occur or fault messages (F.XX)
are displayed, proceed as set out in the
tables in the appendix.
If the product is not functioning cor-
rectly, contact a competent person.
5.2 Displaying the status codes
1. Press and at the same time.
S.XX is shown in the display, fol-
lowed by the heating flow temper-
ature and the internal system pres-
sure.
2. Look up the meaning of the status
codes.
Status codes Overview ( Page 17)
3. Press .
The display switches to the basic
display.
6 Care and maintenance
6.1 Maintenance
An annual inspection and biennial main-
tenance of the product carried out by a
competent person is a prerequisite for
ensuring that the product is permanently
ready and safe for operation, reliable, and
has a long working life. The inspection
may require maintenance to be carried out
earlier, depending on the results.
6.2 Caring for the product
Caution.
Risk of material damage
caused by unsuitable clean-
ing agents.
Do not use sprays, scouring
agents, detergents, solvents
or cleaning agents that con-
tain chlorine.
14


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