9 x Faults and malfunctions
61
FA ROTEX A1 BO - 10/2007
Tab. 9-2 Possible malfunctions on the A1 BO (Part 2)
Malfunction Possible cause Possible solution
Burner motor not running
despite burner demand
Plug connections of the control unit are loose
• Check/insert plug connections
Heater element or thermostat for preheating of the
heating oil defective
• Change oil preheater
Burner motor defective (bearing has seized)
• Change burner motor
Condenser defective
• Change condenser
Oil pump has seized
• Change oil pump
Burner starting is hard Start delay due to bad ignition
• Adjust ignition electrodes
Burner starts with blue
flame, but tears out at
intervals
Recirculation too large
• Reduce recirculation slightly
Flame has gold strands,
higher NOx-component
Recirculation too low
• Raise recirculation further
Flame is all blue and stable
in operation, but cold start
not possible
Recirculation too large
• Reduce recirculation slightly
No ignition Ignition electrodes short circuited
• Set/change ignition electrodes
Distance of ignition electrodes too large
• Set ignition electrodes
ignition electrodes contaminated or humid
• Clean ignition electrodes, check oil nozzle and burner setting
Ignition electrodes burnt out
• Change ignition electrodes
Insulating body cracked
• Change ignition electrodes
Ignition transformer defective
• Replace ignition transformer
Ignition cable burnt
• Change ignition cable and determine the cause
Automatic firing unit faulty
• Change automatic firing unit
Loud, whistling
mechanical noise
Oil pump is suctioning air
• Check bolts
Vacuum in the oil line too high
• Clean the filter, open valves fully
Burner motor bearing defective
• Change burner motor
Oil pump defective
• Change oil pump
Oil pump does not pump
any oil
Stop valve at oil filter or in suction line closed
• Open stop valve
Oil pump gear damaged
• Change oil pump
Suction valve has leakage
• Clean/change suction valve
Oil line has leakage (pump suctions air)
• Check bolts
Filter clogged
• Clean the filter
Filter not leakproof
• Change filter
Oil pump power insufficient
• Change oil pump
Clutch defective
• Change clutch
Oil atomisation not
uniform – heavy soot
deposit in flame tube
Oil nozzle loose, clogged or worn out
• Check/tighten/change oil nozzle
Oil nozzle spraying angle is wrong
• Replace oil nozzle
No oil flow Oil nozzle clogged
• Replace oil nozzle
LE membrane valve clogged
• Change LE membrane valve or oil preheater
Mixer device has thick
layer of oil or heavy
carbon deposits
Air supply insufficient
• Check air supply line for clogging
• Use air supply lines with larger cross-section
• Ambient air dependent operation: Check air supply opening
(min. 150 cm
2
unlockable air supply opening)
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