Appendix; A Status Codes - Overview; B Troubleshooting - Vaillant ecoFIT sustain 618 Operating Instructions Manual

Appendix

Status codes – Overview
A
Status codes that are not listed here can be viewed in the installation instructions.
Status code Parameter
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 mode: Anti-cycling time
Displays in hot water handling mode
S.10 DHW demand
S.14 DHW mode: Burner on
Displays in Comfort mode with warm start or hot water handling mode with cylinder
S.20 DHW demand
S.22 DHW mode: Pump pre-run
S.24 DHW mode: Burner on
Others
S.31 No heat demand: Summer mode
S.34 Heating mode: Frost protection
S.46 Waiting time: Measuring program
B Troubleshooting
Fault
Product does not start The gas isolator cock installed on-site and/or the gas
up: isolator cock on the product is closed.
The power supply in the building is disconnected.
–
No hot water
–
Heating remains cold
The product is switched off.
The heating flow temperature is set too low or to the
Heating off position, and/or the hot water temperature
is set too low.
The system pressure is insufficient.
Low water pressure in the heating installation (fault mes-
sage: F.22).
There is air in the heating installation.
After three unsuccessful attempts to ignite the flame, the
product switches to fault mode (fault message: F.28).
0020277253_00 ecoFIT sustain Operating instructions
Meaning
Heating: No heat demand
Heating mode: Pump pre-run
Heating mode: Ignition
Heating mode: Burner on
Heating mode: Fan overrun
Heating mode: Pump overrun
Heating, remaining anti-cycling time xx mins
Hot water requirement via flow sensor
DHW mode: Burner on
Hot water requirement
DHW mode: Pump pre-run
DHW mode: Burner on
Summer mode active
Frost protection mode, frost protection
Comfort protection mode, flame loss at minimum load
Cause Measure
Open both gas isolator cocks.
Check the fuse in the building. The product
switches on automatically when the power is
restored.
Switch on the product (→ "Switching on the
product" section).
Set the heating flow temperature and hot water
temperature (→ "Setting the heating flow temper-
ature" section/→ "Setting the hot water temperat-
ure" section).
Fill the heating installation (→ "Filling the heating
installation" section).
Have your competent person purge the heating
installation.
Press the reset button for one second. The
product makes another attempt to ignite the
flame.
If you have been unable to eliminate the ignition
fault after three reset attempts, consult a com-
petent person.
Appendix
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