Problem
Possible cause
Possible solution
The glass becomes black
The combustion chamber is
not hot enough
• Use the recommended amount
.
• Increase the amount of com-
bustion air with the control lev-
er. Refer to chapter
• Put the wood logs diagonally
and as wide as possible on the
combustion chamber floor.
The moisture content of the
wood logs is too high
• Use dried wood logs with a
moisture content of 10 - 20 %.
• Use wood briquettes
The seal around the door is
damaged
Contact your dealer.
Some cold air flows out from
the front of the appliance when
the appliance is not in use.
The valve in the external
combustion air supply line is
missing or is open.
Close the valve in the external
combustion air supply line.
The underpressure in the in-
stallation room is too high
Reduce the underpressure, for ex-
ample by opening a ventilation
opening in the installation room.
Troubleshooting
Unilux-7 67
21
