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Appendix
Appendix
A Adjustable values – overview
Adjustable values
Heating mode
Heating flow temperature
DHW mode
Hot water temperature
B Troubleshooting
Fault
Product does not
The gas isolator cock installed on-site
start up:
and/or the gas isolator cock on the
product is closed.
– No hot water
– Heating re-
The power supply in the building is dis-
connected.
mains 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 at-
tempts, the product switches to fault
mode (fault message: F.28).
There is a fault in the flue gas route.
Heating does not
The external controller is not set cor-
start.
rectly.
12
Values
Unit
Min.
Max.
℃
Current value
38
Preset
in the
system
℃
Current value
35
60
Cause
Operating instructions HOME 0020224339_00
Increment, select
1
1
Measure
Open both gas isolator cocks.
Check the fuse in the building.
The product switches on automat-
ically 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 elim-
inate the ignition fault after three
fault clearance attempts, consult a
competent person.
Have a competent person rectify
the fault.
Set the external controller cor-
rectly (→ Controller operating in-
structions).
Default set-
ting
75
60
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