Vaillant ecoTEC pro Operating Instructions Manual - page 11
Appendix
0020209590_00 ecoTEC pro Operating instructions
11
Appendix
A
Status codes – Overview
Status codes that are not listed here can be viewed in the installation instructions.
Status code
Meaning
Displays in heating mode
S.00
Heating: No heat demand
S.02
Heating mode: Pump pre-run
S.03
Heating mode: Ignition
S.04
Heating mode: Burner on
S.06
Heating mode: Fan overrun
S.07
Heating mode: Pump overrun
S.08
Heating, remaining anti-cycling time xx mins
Displays in hot water handling mode
S.10
Domestic hot water requirement via impeller sensor
S.14
DHW mode: Burner on
Displays in Comfort mode (product with integrated hot water generation) or in cylinder charging mode (product with hot water generation
via an external domestic hot water cylinder)
S.20
Hot water requirement
S.22
DHW mode: Pump pre-run
S.24
DHW mode: Burner on
Other displays
S.31
No heat demand: Summer mode
S.34
Heating mode: Frost protection
S.46
Comfort protection mode, flame loss at minimum load
B
Troubleshooting
Fault
Cause
Measure
Product does not start
up:
–
No hot water
–
Heating remains cold
The gas isolator cock installed on-site and/or the gas
isolator cock on the product is closed.
Open both gas isolator cocks.
The power supply in the building is disconnected.
Check the fuse in the building. The product
switches on automatically when the power is
restored.
The product is switched off.
Switch on the product (→ "Switching on the
product" section).
The heating flow temperature is set too low or to the
Heating off position, and/or the hot water temperature
is set too low.
Set the heating flow temperature and hot water
temperature (→ "Setting the heating flow temper-
ature" section/→ "Setting the hot water temperat-
ure" section).
The system pressure is insufficient.
Low water pressure in the heating installation (fault mes-
sage: F.22).
Fill the heating installation (→ "Filling the heating
installation" section).
There is air in the heating installation.
Have your competent person purge the heating
installation.
After three unsuccessful attempts to ignite the flame, the
product switches to fault mode (fault message: F.28).
Press the fault clearance key for one second.
The product makes another attempt to ignite the
flame.
If you have been unable to eliminate the ignition
fault after three fault clearance attempts, consult
a competent person.
Hot water generation
functioning correctly;
heating does not start
up.
The external controller is not set correctly.
Set the external controller correctly (→ Controller
operating instructions).