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© Baxi Heating UK Ltd 2009
17.0 Fault Indication Display
17.0 Fault Indication Display
1. The boiler has three neon indicators. The upper two
function as boiler on and fault indicators.
2. Depending on the nature of the fault the upper two neons
will illuminate, go off or flash.
3. There are five possible combinations, each indicating one
or more fault conditions. These are described below.
A
The flue or flue terminal is blocked or obstructed in some
way, or there is an internal fault.
B
The circulating pump is faulty or the system pressure has
dropped. Check the system pressure. If the pressure is in the
normal range a pump fault is indicated.
C
A fault on the boiler temperature sensor is indicated.
D
The primary system or the boiler has overheated. Allow the
boiler to cool. Turn the selector switch fully anti-clockwise
against the spring pressure to the ‘Reset’ position and hold for
at least 2 seconds.
If the boiler does not relight after resetting it is possible that
the flue has overheated.
E
The burner has failed to light, or incomplete lighting of the
burner has occurred. Turn the selector switch fully anti-
clockwise against the spring pressure to the ‘Reset’ position
and hold for at least 2 seconds.
If the boiler does not relight after resetting blockage of the
condensate drain or trap has occurred.
Burner On
Flame Failure
Power On
Off
Fast Flashing (2 every second)
On
A
Burner On
Flame Failure
Power On
Off
Slow Flashing (1 every 2 seconds)
On
B
Burner On
Flame Failure
Power On
Slow Flashing (1 every 2 seconds)
Slow Flashing (1 every 2 seconds)
On
C
Burner On
Flame Failure
Power On
Slow Flashing (1 every 2 seconds)
On
On
D
Burner On
Flame Failure
Power On
Off
On
On
E