Vaillant ecoCRAFT exclusive, Operating Instructions Manual

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5 Troubleshooting
16
Operating instructions ecoCRAFT exclusive 0020149575_01
5.2 Checking the product status
Heizbetrieb - Bren
1
2
1. Call up the product status by pressing
the i (2) button.
2. Switch the display (1) back to normal
operating mode by pressing the i but-
ton.
5.3 Status code meanings
The status codes that are shown in the
DIA system's display provide informa-
tion about the product's current operating
status.
If several operating statuses occur at the
same time, the applicable status codes are
displayed alternately, one after the other.
The status code is explained a plain text
display in the display.
Status
code
Meaning
Heating mode
S.0 No heat demand
S.1 Fan start-up
S.2 Pump pre-run
S.3 Ignition
S.4 Burner on
S.6 Fan overrun
S.7 Pump overrun
S.8
Remaining anti-cycling time xx
min
S.31 No heat demand (summer mode)
S.34 Frost protection
Cylinder charging mode
S.20 DHW demand
S.22 Pump pre-run
S.24 Burner on
Status
code
Meaning
S.27 Pump overrun
5.4 F.22 Risk of dry fire
As soon as the system pressure falls
below 0.06 MPa (0.6 bar), the pressure
display flashes in the display along with
the current water pressure. As soon as
you have added sufficient water, the cur-
rent flow temperature is displayed again.
If the pressure falls below 0.03 MPa
(0.3 bar), the product switches off. Fault
message
F.22 appears in the display.
▶
Fill the heating installation with suitable
heating water and purge the heating
installation.
▶
If the pressure drops too frequently,
contact an approved heating special-
ist company. The cause of the loss in
heating water must be established and
eliminated.
5.5 F.28 No ignition on start-up
If the burner fails to ignite after three at-
tempts, the product does not start up and it
switches to
Fault .
The symbol is shown in the display.
▶
Check whether the gas isolator cock is
open.
▶
If the gas stopcock is closed, open the
gas stopcock with the agreement of an
installation company.
▶
Press and hold the reset button for
one second in order to cancel the ig-
nition switch-off after three attempts.
▶
If the product does not start up after
three reset attempts, contact an ap-
proved heating specialist company.