The burner can work normally, but it emits black smoke when burning. Why does this happen?

Fault Analysis

Solutions

Loose screws or atomizer problems in the pressure atomizing part of the nozzle

Replace and tighten screws

Oil pump damage, oil pressure too high

Replace or repair the oil pump

Oil supply system blocked

Check the oil filter, the filter screen in the oil pump, the filter screen of the oil nozzle, etc., and clean the blocked part in time

The damper is too small

Open the damper wide

The blade of burner fan is full of oil, which affects the output

Remove the oil contamination from the fan blades