FULTON ICS Classic Series Instruction, Operation And Maintenance Manual page 25

LE Maintenance
Problem
Flame Failure
Burner Cut-Off
Cause
5. Scanner
6. Flame Safeguard Control
7. Loose wire at fuel
valve circuit
8. Contact open on air
safety switch
9. Scanner wiring reversed
at panel box
1. Power Supply
2. Gas Supply
3. Ignition Electrodes
4. Scanner
5. Air Switch
6. Gas Valve Sticking
(Pilot)
7. Weak Amplifier
8. Weak Pilot
9. Faulty Liquid Level Control
10. Dirty or defective
UV Scanner
Remedy
Check for dirt on flame scanner and clean. Check for
proper location of detector.
Check voltage at terminal leading to main gas valve.
If no power, replace the control.
Tighten wiring connections.
Adjust to proper setting.
Change to correct terminals.
Check fuse or circuit; reset or replace, as necessary.
Check to be sure main gas cock is not closed. Check coil
in gas valve with OHM meter. Replace if faulty. Check gas
regulator setting and readjust as necessary. Check inlet
gas pressure and increase or decrease as necessary.
Check electrodes for carbon buildup and clean if
necessary.Check for proper adjustment. Readjust if
necessary. Check for cracks in porcelain; if found, replace.
Check for dirt on flame scanner and clean.
Check for proper location of detector.
Check for bad air switch by jumpering the two air switch
leads as the terminal block. If the boiler starts and runs
with these terminals jumpered, the air switch should be
replaced.
Check for dirt in valve or orifice and clean if necessary.
Check for faulty actuator or valve and replace if necessary.
Replace.
Adjust to larger pilot by adjusting pilot gas pressure
regulator.
Check to see if there is power to terminal number 10
when the sight glass shows the proper water level.
If there is no power at this terminal, the control is bad and
must be replaced.
Clean or replace.
19-G 1/01