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
