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6
Maintenance
6.1
Problems and remedies
If the burner does not work properly, first you must:
1
check that the electric connections have been correctly performed;
2
ensure that the fuel is delivered correctly;
3
check that all the adjustment parameters (e.g. boiler water temperature or boiler steam pressure) are correctly set.
GAS 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
22
Possible cause
• No electrical power supply . . . . . . . . . . . . . . . . . . . .Close all switches - Check connec-
• 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
• No gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Open the manual valves between
• Mains gas pressure insufficient. . . . . . . . . . . . . . . . .Contact your GAS COMPANY
• Minimum gas pressure switch fails to close . . . . . . .Adjust or 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 solenoid VR allows little gas through . . . . . . . . .Increase
• Solenoid valves VR or VS fail to open . . . . . . . . . . .Renew the coil or rectifier panel
• Gas pressure too low . . . . . . . . . . . . . . . . . . . . . . . .Increase on the regulator
• Defective ignition transformer . . . . . . . . . . . . . . . . .Replace
• Erroneous valve or transformer electrical . . . . . . . .Repeat connections
connections
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
• A cock down-line of the gas train is closed . . . . . . . .Open
• Air in pipework . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bleed air
• The solenoid VR allows little gas through . . . . . . . . .Increase
• Max. gas pressure switch operates. . . . . . . . . . . . . .Adjust or replace
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
Recommended remedy
tions
meter and train
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