There is flame when the control is not telling the boiler to run. The red light will display and the word LOCKOUT will flash. This code indicates a serious safety issue. The boiler will not restart until the cause is determined by a technician and he pushes the RESET button on the display. During this lockout fault, the pump will be on as indicated on the second line of the display.
- Look into window. If there is flame, turn the gas off to the boiler at the service valve and replace the gas valve.
- If the flame signal on the status menu is greater than 1.0 when the burner is not lit, replace the spark igniter and the flame rectification probe.
- If the flame return sensor is not present after turning off the gas supply, check the gas valve electrical connection.
- Repair condensate system as necessary. If condensate has backed up and partially filled the combustion chamber, the refractory wall may be damaged and should be replaced.
- Turn the gas on at the service valve after corrective action is taken.
- If the refractory wall falls against the rectifier probe, it may conduct the signal to ground, giving a false reading.
