Troubleshooting - FULTON FB-L 012 Installation Operation And Care

Troubleshooting

This troubleshooting guide will assist in the diagnosis and correction of minor field problems. It should be used in conjunction with the unit
wiring diagram. In any case requiring additional assistance, contact your local authorized Fulton Representative.
Problem
Control Circuit Failure
Pump Circuit Failure
Primary Voltage Circuit
Cause
A. Fuse
B. Voltage
C. Control Switch
D. Low Water Safety Relay
E. Corrosion of Probes
F. Staging Controller
A. Fuse
B. Corrosion of Probes
C. Wiring Connections
D. Motor Starter Relay
A. Fuse
B. Voltage
Check
If a break is detected, shut off power and remove fuse.
Replace with a new fuse of same voltage and amps. Turn
power on.
Trace wiring diagram through each component to verify
power in each stage. If voltage is not detected at any point,
replace component and continue test until circuits test clear.
Check all wires from switch terminals for looseness or
corrosion. Replace if either is evident. Next check for
proper make and break of switch.
Verify that boiler has water. Check to verify power on
terminal #1. If power is present, check to verify power on
terminal #10. If power is not present, press the low water
reset button to reset relay. If relay does not reset, inspect
terminals for loose connections. Inspect probe connection.
Check all wires to verify proper wiring to each probe. If a
wire is suspected to be in the wrong place, shut off power
and check wire with a continuity light. Check probes. If
probes are dirty, clean with very fine emory paper and
replace.
Verify timing and stage selection on DIP switches.
If a break is detected, shut off power and remove fuse.
Replace with a new fuse of same voltage and amps. Turn
power on.
To verify proper wiring to each probe. If a wire is suspected
to be in the wrong place, shut off power and check wire
with a continuity light. Check probes. If probes are
dirty,clean with veryfine emory paper and replace.
With power off, check continuity of circuit through each
point in the circuit. If a break in the circuit is found, repair.
After repair, recheck with continuity light with power off.
Turn power on and check with an amp meter.
Check power supply to coil on motor starter.coil is being
powered, check if contactors are being engaged
completely. If coil and contactors are engaging, check
power in and out on the control circuits. If contactor is
chattering, clean contacts. If motor starter relay is weak or
bad, replace.
If a break is detected, shut off power and remove fuse.
Replace with a new fuse of the same voltage and amps.
Turn power on.
Trace wiring diagram through each component to verify
power in each stage. If voltage is not detected at any point,
replace component and continue test until circuits test
clear.
Maintenance
27
Electric IOM