Problems And Remedies - Riello DB 6 LM C10 TC FS1 A0 T150 Installation, Use And Maintenance Instruction

7.3

Problems and remedies

If the burner does not work properly, first you must:
1 check that the electric connections have been correctly performed;
2 make sure that the fuel is flowing;
3 check that all the adjustment parameters (e.g. boiler water temperature or boiler steam pressure) are correctly set.
Fault
The burner does not start
The burner does not start and a
function lock out occurs
The burner starts but stops at
maximum air damper setting
The burner ignites but then
blocks
The burner starts and then locks
out
The burner stays in the pre-
purge stage
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
Lock out without symbol indica-
tion
During operation, the burner
stops in lock out
Lock out when burner stops
Ignition with pulsation
CHAPTER
Possible cause
• No electrical power supply . . . . . . . . . . . . . . . . . . . .Close all switches - Check connec-
• A limiter or safety control device is open. . . . . . . . . .Adjust or replace
• Control box lock-out . . . . . . . . . . . . . . . . . . . . . . . . .Reset control box
• Control box fuses blown . . . . . . . . . . . . . . . . . . . . . .Replace
• Erroneous electrical connections . . . . . . . . . . . . . . .Check connections
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
• Air pressure switch in operating position . . . . . . . . .Adjust or replace
• Contact 1 of the servomotor, terminals 11-8 . . . . . . .Adjust cam 1 or replace the
of the control box do not operate . . . . . . . . . . . . . . .servomotor
• Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace control box
• Contact 1 of the servomotor, or terminals 9-8. . . . . .Adjust cam 1 or replace the
of the control box do not operate . . . . . . . . . . . . . . .servomotor
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 control box
• Contacts 3 or 5 of the servomotor, or terminals . . . .Adjust cams 3 or 5 or replace
10-8, of the control box do not operate . . . . . . . . . . .the servomotor
• Defective ignition transformer . . . . . . . . . . . . . . . . .Replace
• Erroneous valve or transformer electrical . . . . . . . .Repeat connections
connections
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
• Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace control box
• Fault on air pressure switch . . . . . . . . . . . . . . . . . . .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
7
Maintenance
Recommended remedy
tions
17