HVACopediaNTI · Boiler
Lockout 148 Internal fault: Flame bias out of range 6
What the control is telling you
Control board self-check reported an internal problem: Flame bias out of range 6.
Applies to: Trinity Tft60, Tft85, Tft110, Tft154, Tft201, Tft285, Tft340, Tft399
Models that show this code
13 models in Trinity Tft
Other codes on the same units
- Lockout 144 Internal fault: Flame bias out of range 2
- Lockout 145 Internal fault: Flame bias out of range 3
- Lockout 146 Internal fault: Flame bias out of range 4
- Lockout 147 Internal fault: Flame bias out of range 5
- Lockout 15 Internal fault: Safety relay test failed due to feedback ON
- Lockout 15 Internal fault: Safety relay test failed due to feedback ON
- Lockout 157 Combustion pressure and Flame OFF
- Lockout 157 Combustion pressure and Flame OFF
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Source: NTI Trinity Tft399 Installation and Operation Manual (2018-09-07), Sec. 16.0 Troubleshooting, Table 16-3. Summarized in our own words; check the original manual for your model.
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