Riello RLS 250/M, Installation, Use And Maintenance Instructions

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Faults - Possible causes - Solutions
(1)
The control box is fitted with a disc rotates during the firing programme, which can been seen through the transparent lock-out
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.
(2)
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
breaking the tag on the panel which holds in place.
The burner repeats the start-
ing cycle without lock out 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.
Reduce operating pressure of
minimum gas pressure switch.
Replace gas filter
Lock out without symbol indi-
cation
Flame simulation Replace control box
During operation, the burner
stops in lock out Defective flame sensor Replace worn parts
Fault on air pressure switch Replace
Max. gas pressure switch operates Adjust or replace
Lock out when burner stops Flame remains in combustion head or flame
simulation Eliminate persistence of flame
or replace control box
Ignition with pulsation Poorly adjusted head Adjust
Ignition electrode wrongly adjusted Adjust
Poorly adjusted fan air gate: too much air Adjust
Output during ionisation phase is too high Reduce
GAS OPERATION
SYMBOL
(1)
FAULT PROBABLE CAUSE SUGGESTED REMEDY