Soft Lockout Error Code - TriangleTube prestige Service Technician's Trouble Shooting Manual

Soft Lockout Error Code

The boiler will display Soft Lockouts with a flashing "9", then "b" as the first digit on the left of the display followed by a
steady two digit code. The boiler will automatically reset a Soft Lockout once the condition has been corrected and
returned to standard operating condition.
Code
Error Condition
b- 18 High Temperature Limit,
Boiler Supply
b- 19 High Temperature Limit,
Boiler Return
If the primary boiler supply water temperature exceeds 202ºF, the burner will
shut down until the supply temperature drops below 200ºF. The boiler circula-
tor will continue operating.
• This problem should only occur if the heat load demand is less than
the low input-firing rate of the boiler, typically found on small single
heat zones and there is a potential flow issue.
- Verify the boiler and heating system are filled with water and the
LWCO is operating properly.
- Ensure the boiler and heating system have been properly purged
and there is no entrapped air.
- Inspect and verify heating system piping and its components.
Ensure piping is per the recommendations given in the Prestige
Installation Manual or per other approved/recognized designed
configurations.
• Use a temperature-metering device to measure the supply water tem-
perature leaving the boiler. Compare this measured temperature with
the display temperature (INFO Mode display, "1" is the first digit on the
left followed by the temperature.)
- Replace the supply temperature sensor if the temperature com-
parison is largely varied by more than 10ºF.
- Replace the control module if the sensor replacement does not
resolve the problem.
• Ensure system and/or zone circulators are operating properly
f the primary boiler return water temperature exceeds 202ºF, the burner will
I
shut down until the return temperature drops below 200ºF. The boiler circula-
tor will continue operating.
• This problem rarely occurs unless the boiler experiences an Error
Code 18 and the system is charged with a water temperature in
excess of 202ºF
- Verify the boiler and heating system are filled with water and the
LWCO is operating properly.
- Ensure the boiler and heating system have been properly purged
and there is no entrapped air.
- Inspect and verify heating system piping and its components.
Ensure piping is per the recommendations given in the Prestige
Installation Manual or per other approved/recognized designed
configurations.
- Ensure the boiler piping is correct and the water flow is not
reversed or pipes are cross connected.
• Use a temperature-metering device to measure the return water tem-
perature entering the boiler. Compare this measured temperature with
the display temperature (INFO Mode display, "2" is the first digit on the
left followed by the temperature.)
- Replace the return temperature sensor if the temperature com-
parison is largely varied by more than 10ºF.
- Replace the control module if the sensor replacement does not
resolve the problem.
9
Correcting Error Condition