Riello DB 6 LSE C13 Installation, Use And Maintenance Instructions page 24

GAS WORKING
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
OIL WORKING
Fault
The burner does not start
The burner does not start and a
function lock out occurs
The burner ignites but then
blocks
The burner starts and then
locks out
After pre-purge and safety time,
the burner goes to lock-out and
the flame does not appear
The burner goes to lock-out right
after flame appearance
During operation, the burner
stops in lock out
Lock out when burner stops
Ignition with pulsation
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
Possible cause
• No electrical power supply . . . . . . . . . . . . . . . . . . . .Close all switches - Check
• A limiter or safety control device is open. . . . . . . . . .Adjust or replace
• Flame control lock-out. . . . . . . . . . . . . . . . . . . . . . . .Reset control box
• Control box fuses blown . . . . . . . . . . . . . . . . . . . . . .Replace
• Erroneous electrical connections . . . . . . . . . . . . . . .Check connections
• Defective flame control . . . . . . . . . . . . . . . . . . . . . . .Replace
• Air pressure switch in operating position . . . . . . . . .Adjust or replace
• Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace control box
Air pressure switch inoperative due to insufficient air pressure:
• Air pressure switch adjusted badly . . . . . . . . . . . . . .Adjust or replace
• Pressure switch pressure point pipe blocked . . . . . .Clean
is blocked
• Head wrong adjusted . . . . . . . . . . . . . . . . . . . . . . . .Adjust
• Fault in flame detection circuit . . . . . . . . . . . . . . . . .Replace flame control
• The pilot solenoid allows little gas through. . . . . . . .Increase
• The pilot solenoid fail to open . . . . . . . . . . . . . . . . .Renew the coil or rectifier panel
• Defective ignition transformer . . . . . . . . . . . . . . . . .Replace
• Erroneous valve or transformer electrical . . . . . . . . .Repeat connections
connections
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
• Fault on air pressure switch . . . . . . . . . . . . . . . . . . .Replace
• Flame remains in combustion head or flame . . . . . .Eliminate persistence of flame
simulation
• Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . .Adjust
• Poorly adjusted air damper, too much air . . . . . . . . .Adjust
• Output during ignition phase is too high . . . . . . . . . .Reduce
6
CHAPTER
Recommended remedy
Recommended remedy
connections
or replace control box
Maintenance
23