90
Trouble Shooting Instructions
8. Cleaning and lubricating
instructions
Depending on the amount of dirt intro-
duced by the combustion air it will be
necessary to clean the fan impeller,
ignition electrodes, flame sensors and
air dampers as required.
For burner with mechanical compound
controller:
Lubricate the ball heads of the com-
pound controller setting screws with
grease.
The bearing points of the burner moving
parts require no maintenance.
Damages of ball bearings should be
detected and eliminated at an early
stage to avoid greater subsequent
trouble. Listen to the motor bearing
noise to identify possible irregularities.
4. Unsteady atomization
Cause
Remedy
Loosened
nozzle.
Tighten nozzle
Hole partly clog-
ged.
Remove and
clean or replace.
Worn by long-
time use.
Replace by new
one.
Oil flow blokkage
Due to clogged
nozzle.
Remove and
clean.
Nozzle leaking.
Replace nozzle.
Shut-off valve in
nozzle rod lea-
king.
Replace valve.
5. No response to flame by
automatic furnace controller
with flame sensor
Cause
Remedy
Dirty flame sen-
sor.
Clean flame
sensor.
Burner fails to
start.
Check
connection of
automatic fur-
nace controller.
Trouble lamp
lights; flame
trouble.
Unlock and
search for cause
UV-Radiation
too weak.
Check combus-
tion setting.
Burner starts
without flame
formation.
Solenoid valve
fails to open.
Defective coil or
rectifier.
Check connec-
tion.
Lack of gas or
gas pressure too
low.
Check gas pres-
sure controller,
gas valve, gas
filter.
Is the equip-
ment gas cock
open?
6. Mixing unit gives poor com-
bustion data due to heavy inside
accumulation of oil or coke
(oil operation)
Cause
Remedy
Incorrect set-
tings.
Correct settings.
Incorrect mix-
ture ignition unit.
Replace unit.
Nozzle too large
or too small.
Replace nozzle.
Incorrect angle
of spray.
Replace nozzle.
High or low com-
bustion air flow
rate.
Readjust burner.
Furnace cham-
ber not suf-
ficiently
ventilated.
Furnace cham-
ber to be ventila-
ted through a
non-closed ope-
ning with a cross
section of min.
50 % of all chim-
ney cross sec-
tions of the
furnace system.
Take care to
observe the
application regu-
lations.
7. Solenoid valve fails to open
Cause
Remedy
Defective coil.
Replace coil.
Defective auto-
matic furnace
controller.
Replace auto-
matic furnace
controller.
Valve does not
close tightly; dirt
accumulated on
sealing surfaces.
Open valve;
remove foreign
matter; replace
valve if required.
