Troubleshooting - Bradford White PDX1-40S6FBN Installation And Operating Instruction Manual

TROUBLESHOOTING

LED Status
None (LED not on or
flashing)
One short flash every
four seconds
Alternates bright and
dim (Heartbeat)
Short flash once every
second
Two 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)
Six flashes-two flashes,
three second pause
(Soft lockout)
Control Status
Electrical power not
present.
Stand-by mode,
Thermostat is satisfied
(no faults).
Thermostat calling
for heat (no fault).
Weak pilot signal on
last call for heat.
Pressure switch not
working-closed
position.
Pressure switch or
blower temperature
switch not working -
open position.
Excessive tank
temperature.
System must be reset.
False pilot flame
present.
Failed to light pilot.
System auto resets
after 5 minutes.
Pressure switch or
blower temperature
switch opened during
burner operation.
System auto resets
after 5 minutes.
Probable Cause
Control power switch in "OFF" position.
Supply voltage interuppted.
Temperature demand is satisfied (no call for heat).
Tank temperature below set point 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.
1. Pressure switch tubing kinked or blocked.
2. Blocked pressure tap on switch.
3. Faulty pressure switch.
1. Vent blockage or improper vent configuration.
2. Pressure switch tubing kinked or blocked.
3. Blower not spinning up to speed.
4. Vent temperature too high
5. Faulty pressure switch or vent limit switch.
1. Thermowell sensor out of calibration.
2. Faulty gas valve.
1. Pilot valve stuck in open position.
1. Unstable pilot.
2. Pilot tube blocked or restricted.
3. Oxidation build up on pilot electrode.
4. Wire damage to pilot assembly or bad connection
at gas valve.
1. Pressure switch tubing kinked or blocked.
2. Vent blockage or improper vent configuration.
3. Vent termination being affected by windy
conditions.
4. Blower not spinning up to speed.
5. Vent temperature too high
6. Faulty pressure switch or blower temp. switch.
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