Riello 46662X Installation, Use And Maintenance Instructions page 42

Fault
The burner repeats the starting
cycle without lock out
During operation, the burner
stops in lock out
Lock out when burner stops
Ignition with pulsation
20
Possible cause
• Mains gas pressure is near the value to which . . . . .Reduce operating pressure
the min. gas pressure switch gas is adjusted.. . . . . .of minimum gas pressure switch.
The repeated drop in pressure which follows . . . . . .Replace the gas filter cartridge
valve opening causes temporary opening of the
pressure switch itself, the valve immediately
closes and theburner comes to a halt. Pressure
increases again, the pressure switch closes again
and the firing cycle is repeated. The sequence
repeats endlessly. And so on.
• Fault on air pressure switch . . . . . . . . . . . . . . . . . . .Replace
• Max. gas pressure switch operates. . . . . . . . . . . . . .Adjust or replace
• Flame remains in combustion head or flame . . . . . .Eliminate persistence of flame
simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .or replace control box
• Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . .Adjust
• Poorly adjusted air damper, too much air . . . . . . . . .Adjust
• Output during ignition phase is too high . . . . . . . . . .Reduce
6
CHAPTER Maintenance
Recommended remedy