Troubleshooting
If afault occurs,the BIASoperating,information anddisplaysystemdisplaysafauIt code,to which causeand
remedyfrom the following table maybeallocated.Thistable isdesignedto allowyour localheatingcontractor
to trace the fault moreeasily.
E= pressthe reset button after a fauIt has been removed
E
STB
- High-limitsafety cut-out
Theflow temperaturehasexceeded110 °C.
The maintenance valves were closed during maintenance,
no fault.
No flow through the heat exchanger due to
- an inadequately vented system
- a faulty overflow valve
- a faulty pump + a faulty flow switch
- a blocked water pipe + a faulty flow switch
The control unit records an incorrect flow temperature due to
- a faulty flow sensor
5 E
Flame failure during operation
Flamefailure within 15 s after
the flame has beensuccessfullyrecognised.
Lack of gas because
- the gas supply pressure is too low.
The gas mixture is difficult to ignite because
- the CO,value is outside the permissible range
- flue gas is getting into the combustion air supply - flue pipe is not gas-tight
- the gas restrictors or their gasket not OK, if required for this boiler
- of wind influence, the wind protection is missing
Faulty components must be replaced with original spare parts.
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