Bradford White HE-4-50S6FSX - Manual (Page 7)

7
TROUBLESHOOTING CHART
(Replaces pg. 26-27 in instruction manual.)
LED Status Control Status Probable Cause
None (LED not on
or flashing)
Electrical pow er not
present
1. Control pow er sw itch in " OFF" position
2. Supply voltage interrupted
One short flash
every four
seconds
Stand-by mode,
Thermostat is satisfied (no
faults)
Temperature demand is satisfied (no call for
heat)
Alternates bright
and dim
(heartbeat)
Thermostat calling for
heat (no fault)
Tank temperature below setpoint of
thermostat
Short flash once
every second
Weak pilot signal on last
call for heat
1. Unstable pilot
2. Pilot tube block or restricted
3. Oxidation build-up on pilot electrode
4. Wire damage to pilot assembly or bad
connection at gas valve
Tw o flashes,
three second
pause
Pressure sw itch not
w orking - closed position
1. Pressure sw itch tubing kinked or blocked
2. Blocked pressure tap on sw itch
3. Faulty pressure sw itch
Three flashes,
three second
pause
Pressure sw itch or
temperature sw itch not
w orking - open position
1. Vent blockage or improper vent
configuration
2. Pressure sw itch tubing kinked or blocked
3. Blow er not spinning to speed
4. Faulty pressure sw itch
Four flashes,
three second
pause
Excessive tank
temperature, system must
be reset
1. Thermal w ell sensor out of calibration
2. Faulty gas valve
Five flashes,
three second
pause
False pilot flame present Pilot valve stuck in open position
Six flashes, one
flash, three
second pause
(Soft Lockout)
Failed to light pilot,
system resets after (5)
minutes
1. Unstable pilot
2. Pilot tube block or restricted
3. Oxidation build-up on pilot electrode
4. Wire damage to pilot assembly or bad
connection at gas valve