Fulton FB-S Horizontal Firetube Boiler - Manual (Page 54)

The Fulton Companies*FB-S Series Manual*Version 2010-0820 rev. 3/5/13
Page 54
Fault Finding Table
Problem Solution
Burner does not start
1. No voltage at program relay power input terminals.
a) Main disconnect switch open.
b) Blown control circuit fuse.
c) Loose or broken electrical connection.
2. Program relay safety switch requires resetting.
3. Limit of circuit not completed-no voltage at end of
limit circuit program relay terminal.
a) Pressure of temperature is above setting of
operation control.
b) Water below required level.
c) Fuel pressure must be within setting of low
pressure and light pressure switch.
d) Check burner air proving switch and high fire
limit switch.
e) Heavy oil fired unit-oil temperature below
minimum setting.
4. Fuel valve interlock circuit not completed.
No Ignition
1. Lack of spark
a) Electrode grounded or porcelain cracked.
b) Improve electrode setting.
c) Loose terminal on ignition cable.
d) Inoperative ignition transformer
e) Insufficient at pilot ignition circuit terminal.
2. Spark but not flame
a) Lack of fuel-no gas pressure, closed valve,
empty tank, etc.
3. Low fire switch open in low fire proving circuit.
Damper motor not closed, defective switch.
4. Running interlock circuit not completed.
a) Combustion or atomizing air proving switch
defective or not properly set.
b) Motor starter interlock contact not closed.
5. Flame detector defective, sight tube obstructed or
lens dirty.
6. Check the programmer controller.