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Symbol
Problem
The burner continues to
repeat the start-up cycle,
without lockout
Lockout without symbol
indication
Burner goes into lockout
during operation
Lockout when the burner
stops
Ignition with pulsations
Faults - Possible causes - Solutions
Possible cause
The gas pressure in the gas mains lies very
close to the value to which the minimum gas
pressure switch has been set.
The sudden drop in pressure after valve open-
ing causes temporary opening of the pressure
switch itself, the valve immediately closes and
the burner comes to a halt.
Pressure increases again, the pressure switch
closes again and the ignition cycle is repeated.
The sequence repeats endlessly.
Flame simulation
Faulty flame sensor
Air pressure switch faulty
Maximum gas pressure switch intervention
Permanent flame in the combustion head or
flame simulation
Poorly adjusted head
Ignition electrode incorrectly adjusted
Incorrectly adjusted fan air damper: too much
air
Output during ionisation phase is too high
39
GB
Recommended remedy
Reduce the minimum gas pressure switch
intervention pressure.
Replace the gas filter cartridge
Replace the control box
Replace worn parts
Replace
Adjust or replace
Eliminate permanency of flame or replace
the control box
Adjust
Adjust it
Adjust
Reduce
Tab. N
20079034
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