Bradford White 100T399-SOLA, Supplement To Installation & Operation Manual

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14
Error Code Definition of Code Cause of Problem and Actions Taken to Correct
105
Flame detected out of
sequence

Check to see if flame is present inside the combustion chamber before
or after the ignition cycle.

If so, check to make sure the gas valve is wired correctly.

Check for voltage at the gas valve connection.

Replace the gas valve if defective.

If no flame is visible outside of the ignition sequence/run cycle, then
make sure the flame sensor is wired to the correct terminal.

Make sure the ignition cable is not crossing the flame sensor wire or
ignition ground wires.

If problem persists and all other checks have been verified, replace the
control module.
110
Ignition Failure
Occurred.

Burner failed to light or stay lit after 3 retries.

Hold condition – will reattempt ignition after 15 minute waiting period.

Check gas valve wiring and gas valve operation during the ignition
cycle.

If burner lights but quickly goes out, check the flame sensor wire or the
flame sensor.

If the flame sensor rod is badly corroded with deposits, clean with
sandpaper or replace.

Check the inlet gas supply to make sure the pressure is sufficient and
does not drop after the gas valve opens.

Make sure the combustion blower is operating during the ignition and
run cycle.

Check the venting system to make sure the inlet and exhaust terminals
and venting system is not blocked.
122
Light-off Rate Proving
Failed

If blower speed is not verified from the PWM (Pulse Width Modulation)
signal within 5 minutes, the previously described error code “62”
changes from a hold condition to this lockout code condition.

Check the harness and pin terminals for a good connection to the
control module.

Replace the blower or control module if the wire harness is good.