Vaillant ecoTEC pro Operating Instructions Manual - page 21
Troubleshooting
Operating instructions ecoTEC pro 0020129673_00
21
7
In addition, the maintenance symbol (open-ended spanner)
is displayed after approx. one minute.
If the pressure falls below 0.05 MPa (0.5 bar), the boiler
switches off and the fault message F.22 appears in the dis-
play. To restart the boiler, you must refill the heating system
with water (¬Section 5.1.3 and 5.1.4).
7.4
Resolving ignition faults
b
Caution!
Risk of damage due to improper altera-
tions.
Improper alterations or persistent faults
can result in material damage.
> If you are unable to resolve the ignition
problem yourself by resetting the boiler
three times, then consult your approved
skilled tradesman.
F.28
1
2
7.3
Resetting the boiler
If the burner fails to ignite after five attempts, the boiler
will not operate and switches to "Fault". This is indicated by
the fault code "F.28" (Failure during start-up, ignition unsuc-
cessful) or "F.29" (1) on the display.
The boiler will only ignite automatically again once you
have reset it manually.
> To reset the boiler manually, press the reset button (2)
and hold for one second.
7.5
Maintenance message
58
7.4 Maintenance message
If the open-ended spanner is displayed, a service is required
for the boiler.
> Consult your skilled tradesman about doing this.
The boiler is not in fault mode but continues to operate.
> In the "Live monitor", you can read further information
about the reason for the service (¬ Section 8).
i
If the water pressure is shown flashing at the
same time (¬ Section 7.3), you only have to top
up the water (¬ Section 5.1.3 and 5.1.4).