Appendix; A Status Codes - Overview; B Troubleshooting - Vaillant VU 306/6-3 OV (HGB) ecoFIT sustain 430 Operating Instructions Manual

Appendix

Status codes – Overview
A
Status codes that are not listed here can be viewed in the installation instructions.
Status code
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 cylinder charging mode (product with hot water generation through external domestic hot water cylinder)
S.20 Hot water requirement
S.22 DHW mode: Pump pre-run
S.24 DHW mode: Burner on
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
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.
There is air in the heating installation.
After three unsuccessful ignition attempts, the product
switches to fault mode (fault message: F.28).
There is a fault in the flue gas route.
Heating does not start. The external controller is not set correctly.
0020277263_00 ecoFIT sustain Operating instructions
Meaning
Displays in heating mode
Other displays
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.
Set the heating flow and hot water temperature.
Have a competent person purge the heating
installation.
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.
Have a competent person rectify the fault.
Set the external controller correctly (→ Controller
operating instructions).
Appendix
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