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GAS OPERATION
SYMBOL
FAULT
(1)
The burner repeats the start-
ing cycle without lock out
Lock out without symbol indi-
cation
During operation, the burner
stops in lock out
Lock out when burner stops
Ignition with pulsation
The control box is fitted with a disc rotates during the firing programme, which can been seen through the transparent lock-out
(1)
reset button.
When the burner does not fire or comes to a half following a fault, the symbol which appears behind the reset button indicates the
type of problem.
The fuse is located in the rear part of the control box. A pull-out fuse is also available as a spare part which can be fitted after
(2)
breaking the tag on the panel which holds in place.
20034985
Faults - Possible causes - Solutions
PROBABLE CAUSE
Mains gas pressure is near the valve to which the
min. gas pressure switch gas is adjusted.
The repeated drop in pressure which follows
valve opening causes temporary opening of the
pressure switch itself, the valve immediately clos-
es and the burner comes to a halt.
Pressure increases again, the pressure switch
closes again and the firing cycle is repeated.
And so on.
Flame simulation
Defective flame sensor
Fault on air pressure switch
Max. gas pressure switch operates
Flame remains in combustion head or flame sim-
ulation
Poorly adjusted head
Ignition electrode wrongly adjusted
Poorly adjusted fan air gate: too much air
Output during ionisation phase is too high
40
GB
SUGGESTED REMEDY
Reduce operating pressure of
minimum gas pressure switch.
Replace gas filter
Replace control box
Replace worn parts
Replace
Adjust or replace
Eliminate persistence of flame or
replace control box
Adjust
Adjust
Adjust
Reduce
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