Appendix
12 Operating instructions HOME 0020224339_00
Appendix
A Adjustable values – overview
Adjustable values Values Unit Increment, select Default set-
ting
Min. Max.
Heating mode
Heating flow temperature Current value ℃ 1 75
38 Preset
in the
system
DHW mode
Hot water temperature Current value ℃ 1 60
35 60
B Troubleshooting
Fault Cause Measure
Product does not
start up:
– No hot water
– Heating re-
mains 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 dis-
connected.
Check the fuse in the building.
The product switches on automat-
ically when the power is restored.
The product is switched off. Switch on the product.
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 and hot water
temperature.
There is air in the heating installation. Have a competent person purge
the heating installation.
After three unsuccessful ignition at-
tempts, 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 elim-
inate the ignition fault after three
fault clearance attempts, consult a
competent person.
There is a fault in the flue gas route. Have a competent person rectify
the fault.
Heating does not
start.
The external controller is not set cor-
rectly.
Set the external controller cor-
rectly (→ Controller operating in-
structions).
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