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).
