NOTE: The neons annotated have a dual function, indicating the temperature of the central heating water when constantly illuminated or begin to flash to indicate a fault.
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Fig. 1
Reset
Fig. 2
Reset
Fig. 3
3.0Fault Indication
3.1Air Flow Monitor
1.The boiler is fitted with an air pressure sensing device. This monitors the flue system.
2.If the ( 
) neon illuminates it indicates that the flue or flue terminal is blocked or obstructed in some way, or that
there is an internal fault. If there is no external blockage of the flue terminal that can be easily removed contact your Installer or Service Engineer (Fig. 1).
3.2Pump Fault or Low Pressure
1.The neon (
) will illuminate if the circulating pump is faulty or the system pressure drops below the minimum
requirement (Fig. 1).
2.Check the pressure gauge as described on page 8. If the pressure is in the normal range, a pump fault is indicated. Contact your Installer or Service Engineer to determine the nature of the fault.
3.3Sensor Fault
1.When either of the (
) or (
) neons is illuminated a fault on one of the temperature sensors is indicated (Fig. 1).
Contact your Installer or Service Engineer.
3.4Pump Protection
1.With the selector switch in the on position (Fig. 2) the pump will automatically operate for 1 minute in every 24 hours to prevent sticking.
3.5Safety Thermostat
1.Your Potterton Performa HE is fitted with an additional safety devices, which shut down the boiler in the event of the
system, boiler or flue overheating. The safety thermostat neon (
) will light in this instance (Fig. 1).
3.6Flame Failure
1.The red flame failure neon (
) will illuminate in the event of the burner failing to light, when incomplete lighting of the
burner occurs or blockage of the condensate drain (Fig. 1).
3.7To Reset the Safety Thermostat or Flame Failure
1.To reset: Turn the selector fully
2.If after turning the selector to the ‘Reset’ position the boiler does not relight or the safety thermostat or flame failure operates repeatedly, causing boiler shutdown, a fault is indicated. Your Installer or Service Engineer should be contacted as soon as possible.
6© Baxi Heating UK Ltd 2009
