Riello DB 12 LSM C13 Installation, Use And Maintenance Instructions page 77

GAS OPERATION
Problem
Firing with pulses
OIL OPERATION
Problem
The burner does not start
The burner does not come on and
the lockout appears
The burner turns on and then
stops in lockout mode
The burner turns on and then
remains in lockout mode
Once the pre-purging and the
safety time has elapsed the
burner goes into lockout without
the flame appearing
Locks out with
flame
Burner goes into lockout during
operation
Lockout when the burner stops
Firing with pulses
Faults - Possible causes - Solutions
Possible cause
• Head badly adjusted. . . . . . . . . . . . . . . . . . . . . . . . Adjust it properly
• Fan air damper badly adjusted. Too much air. . . . . Adjust it
• Firing output too high. . . . . . . . . . . . . . . . . . . . . . . . Reduce it
Possible cause
• No power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . Turn off switches - Check wiring
• A limit or safety remote control open. . . . . . . . . . . . Adjust it or replace it
• Flame control lockout. . . . . . . . . . . . . . . . . . . . . . . Release
• Control box fuse broken. . . . . . . . . . . . . . . . . . . . . Replace it
• Incorrect electrical wiring. . . . . . . . . . . . . . . . . . . . . Check connections
• Defective flame control. . . . . . . . . . . . . . . . . . . . . . Replace it
• Air pressure switch in operating position. . . . . . . . . Adjust or replace
• Flame simulation. . . . . . . . . . . . . . . . . . . . . . . . . . . Replace the control box
Air pressure switch does not switch owing to lack of air pressure:
• Air pressure switch is badly adjusted. . . . . . . . . . . Adjust it or replace it
• Pressure socket tube of the pressure switch clogged. . Clean it
• Head badly adjusted. . . . . . . . . . . . . . . . . . . . . . . . Adjust it properly
• Defective flame detection circuit . . . . . . . . . . . . . . . Replace control box
• The VR solenoid lets too little gas through. . . . . . . Increase it
• The VS solenoid valve does not open. . . . . . . . . . . Replace the coil or the panel
• Firing transformer defective. . . . . . . . . . . . . . . . . . . Replace it
• Incorrect valve or firing transformer connections. . Redo them
• Defective control box. . . . . . . . . . . . . . . . . . . . . . . . Replace
• Defective control box. . . . . . . . . . . . . . . . . . . . . . . . Replace
• Fault on air pressure switch . . . . . . . . . . . . . . . . . . Replace
• Permanent flame in the head or flame simulation. . Eliminate permanency of flame or
combustion or flame simulation or
• Head badly adjusted. . . . . . . . . . . . . . . . . . . . . . . . Adjust it properly
• Fan air damper badly adjusted. Too much air. . . . . Adjust it
• Firing output too high. . . . . . . . . . . . . . . . . . . . . . . . Reduce it
37
Recommended remedy
rectifier
replace control box
GB
Recommended remedy
Tab. P
Tab. Q
20119307