Troubleshooting - Bradford White Defender Safety System 238-48248-00 Instruction Manual Supplement

(In addition to instruction manual.)
LED Status
None (LED not on
or flashing)
One short flash
every four
seconds
Alternates bright
and dim
(heartbeat)
Short flash once
every second
Tw o flashes,
three second
pause
Three flashes,
three second
pause
Four flashes,
three second
pause
Five flashes,
three second
pause
Six flashes, one
flash, three
second pause
(Soft Lockout)

TROUBLESHOOTING

Control Status
Electrical pow er not
present
Stand-by mode,
Thermostat is satisfied (no
faults)
Thermostat calling for heat
(no fault)
Weak pilot signal on last
call for heat
Relay not w orking
Relay not w orking
Excessive tank
temperature, system must
be reset
False pilot flame present Pilot valve stuck in open position
Failed to light pilot,
system resets after (5)
minutes
Probable Cause
1. Control pow er sw itch in " OFF" position
2. Supply voltage interrupted
Temperature demand is satisfied (no call for
heat)
Tank temperature below setpoint of
thermostat
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
Faulty relay
Faulty relay
1. Thermal w ell sensor out of calibration
2. Faulty gas valve
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
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