GB
25
Fault Cause Remedy
1. Indicator lamp
Does not light up No voltage Check
Controller not properly adjusted Adjust
Light up Automatic oil firing unit set to malfunction Reset
Automatic oil firing unit defective Replace
Connection terminal not tightly connected Tighten screws
Plug at oil preheater not tight Plug-in properly
2. Motor
Does not start Release thermostat for oil preheater defective Replace
Capacitor defective Replace
Bearings are frozen/jammed Replace motor
Oil pump is frozen/jammed Replace
Runs with loud noise Motor defective Replace
Bearings defective Replace motor
Oil pump defective Replace
3. Ignition
No ignition spark Ignition transformer defective Replace
Ignition cable scorched Replace
Automatic oil firing unit defective Replace
Insulator cracked Replace
Weak ignition spark Ignition electrode setting incorrect Adjust
Ignition electrode contaminated Clean
4. Oil pump
Fluctuating oil pressure Leaks in suction line Seal properly
Dimensioning of suction line not favorable Change according to table
Runs with loud noise Too little oil Check suction line
No oil pressure Suction line not vented Vent
Oil shut-off valve closed Open
Coupling defective Replace
Does not pump oil Leaks in suction line Seal properly
Oil pump filter dirty Clean
Prefilter dirty Clean/replace
Paraffin deposits (+4°C) Install cold-insulation
Heating oil no longer flowable (-1°C) Install cold-insulation
5. Solenoid valve
Does not open Coil defective Replace
Automatic oil firing unit defective Replace
6. Automatic oil firing unit
Switches to malfunction
without flame Outside light (> 5,5 μA) Eliminate outside light
Photo-resistor defective Replace
with flame Photo-resistor dirty Clean
Photo-resistor too weak (< 55 μA) Re-adjust burner
7. Nozzle
Sprays irregularly Nozzle defective Replace
Oil pressure too low Set higher
8. Baffle plate
Very dirty Incorrectly adjustet Re-adjust burner
Nozzle spray irregularly Replace
Nozzle too drips Check oil line
Nozzle too large Replace
Nozzle too small Replace
Spraying angle of the nozzle incorrect Replace nozzle
Changed combustion air volume Re-adjust burner
9. Blower wheel
Delivers too little air Blower wheel contaminated Clean
Air flap jammed Replace
Runs with loud noise Air flap incorrectly installed Install correctly
Blower wheel damaged Replace
Malfunctions – Trouble-shooting
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