Rotex A1 BG - Page 51

10 x Faults and malfunctions
FA ROTEX A1 BGe - 02/2014
51
1) See documentation "ROTEX RoCon BF Controller"
Tab. 10-1 Possible faults on the A1
Burner fan not run-
ning despite burner
demand
No mains voltage on burner
Ɣ Insert X1 plug on automatic firing until it clicks in place.
Ɣ Check voltage at the terminals L-N of the X1 plug
Ɣ Check/ renew fuse.
Plug connections switching panel PCB or auto-
matic firing are loose
Ɣ Check/ insert plug connections
Burner blower defective (bearing has seized)
Ɣ Replace the burner blower.
No gas pressure
Ɣ Inspect the gas connections.
Air in the gas line
Ɣ Vent the gas line.
Gas regulating block not opening
Ɣ Inspect the plug connection between the safety gas
regulation block valve and the automatic firing and
connect correctly if necessary.
Ɣ Check the safety gas regulation block (zero pressure
during ignition).
Ɣ Replacing the safety gas regulation block.
Ɣ Replace the combustion controller.
No ignition
Ɣ See "No ignition" fault
Burner starting is hard Start delay due to bad ignition
Ɣ Adjust ignition electrodes
Ɣ Check starting output and adapt if necessary.
No ignition Ignition electrodes short circuited
Ɣ Check the ignition electrodes and adjust or replace if
necessary.
Distance of ignition electrodes too large
Ɣ Check ignition electrodes and adjust if necessary.
Ignition electrodes contaminated or humid
Ɣ Clean ignition electrodes, and check burner setting.
Ignition electrodes burnt out
Ɣ Change ignition electrodes
Insulating body cracked
Ɣ Change ignition electrodes
Ignition transformer defective
Ɣ Replace ignition transformer
Ignition cable defective, flashovers
Ɣ Change ignition cable and determine the cause
Automatic firing unit faulty
Ɣ Replace the combustion controller.
Loud operating noises Wrong burner setting
Ɣ Correct burner setting.
Bearing damage on burner fan
Ɣ See fault "Loud, whistling mechanical noise".
Loud, whistling
mechanical noise
Burner blower bearing defective
Ɣ Replace the burner blower.
STL switch off Water throughput too low due to air inclusion
Ɣ Vent system
Water flow too low due to valves closing too
quickly along the entire heating network
Ɣ Use slow closing or timed valves, if needed, install
overflow valve
Pump standstill
Ɣ Check mains and PWM control signal connection,
replace pump if necessary.
Storage tank switched off in operation without
hot water storage tank
Ɣ Disconnect storage temperature sensor
Ɣ Switch off storage tank charging circuit
Flue gas temperature
sensor switch off
Flue gas temperature too high
Ɣ
Clean the boiler
Malfunction Possible cause Possible solution