Troubleshooting
20 Operating instructions ecoTEC pro 0020129673_00
7
7.2 Detecting and rectifying malfunctions
If problems occur whilst operating your boiler, you can
carry out the following self-checks:
Problem Possible cause Solution
No hot water,
heating stays cold;
boiler does not start
Building gas isolator cock closed
> Open building gas isolator cock
(¬
Section 5.1.1)
Building power supply switched off > Switch on building power supply
On/off switch on boiler switched off
> Switch on the on/off switch on the
boiler(¬ Section 5.1.2)
The heating flow temperature is set too low or in the
"Heating off" position (¬ Section 5.5) and/or the
domestic hot water temperature is too low
> Set the heating flow temperature to the
desired temperature (¬ Section 5.2) and/or
set the domestic hot water temperature to
the desired temperature (¬ Section 5.3.1).
Filling pressure of the heating installation too low
> Top up the heating system with water
(¬ Section 5.1.4)
Air in the heating installation
> Purge the radiators.
> If the problem occurs again:
Inform the competent person
Ignition malfunction
> Press the Fault clearance button
> If the problem occurs again:
Inform the competent person (¬
Section7.4).
DHW mode without any prob-
lems;
Heating does not start
No heating demand via the controller
> Check the timer programme on the control-
ler and correct it if necessary.
> Check the room temperature and, if
required, correct the target room tempera-
ture
(¬ Section5.4; Controller operating
instructions).
7.1 Detecting and rectifying malfunctions
> If, after checking the points mentioned in Table 7.1, your
boiler still shows signs of a fault, contact your approved
skilled tradesman to eliminate the problem.
7.3 Rectifying a water shortage
0,7bar
7.2 Display of the filling pressure for the heating system is too
low
If the filling pressure for the heating system falls below
0.08MPa (0.8 bar), the red bar display and the current fill-
ing pressure flash in the display.
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