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Cause Remedy
The gas condensing module has been turned off. Turn on the ON/OFF switch: See page 49.
Set the MCB in the power distribution board (main do-
mestic MCB).
Incorrect control unit settings.
The remote control (if installed) is set incorrectly.
Remote control operating instructions
Central heating must be enabled.
Check the settings and correct if required:
Operating program: See page 19.
Room temperature: See page 28.
Time: See page 37.
Central heating time program: See page 29.
Heating curve: See page 29.
The holiday program is switched on: See page 32.
The DHW cylinder is being heated. Wait until the DHW cylinder has been heated up.
Reduce the DHW draw-off rate or temporarily reduce
the set DHW temperature if necessary.
No fuel. Open the gas shut-off valve. If necessary, check with
your gas supply utility.
"Burner fault" is displayed. Reset the burner: See page 45.
Danger
If faults are not rectified, they can have life
threatening consequences.
Do not reset the burner several times in quick
succession. Immediately notify your contractor if
a burner fault occurs repeatedly. Your contractor
will be able to analyse the cause and rectify the
fault.
"Fault" is displayed. Check what type of fault it is. Note the fault message
and acknowledge the fault: See page 44.
You may have to notify your contractor.
"Screed drying" is switched on. No action required.
After expiry of the screed drying time, the selected op-
erating program is switched on.
Rooms are too hot
Cause Remedy
Incorrect control unit settings.
The remote control (if installed) is set incorrectly.
Remote control operating instructions
Check the settings and correct if required:
Operating program: See page 19.
Room temperature: See page 28.
Time: See page 37.
Central heating time program: See page 29.
Heating curve: See page 29.
The comfort function is switched on: See page 30.
Extended heating is switched on: See page 30.
"Fault" is displayed. Check what type of fault it is. Make a note of the fault
message and acknowledge the fault: See page 44. You
may have to notify your contractor.
"Screed drying" is switched on No action required.
After expiry of the screed drying time, the selected op-
erating program is switched on.
What to do if...
Rooms are too cold
6194132
50


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