HVACopediaNTI · Boiler
Lockout 251 Lead drop-stage on error setting does not match drop method configuration
What the control is telling you
Lead drop-stage on error setting does not match drop method configuration.
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 247 Invalid ILK bounce detection enable
- Lockout 248 Invalid forced recycle interval
- Lockout 249 STAT cannot be demand source when Remote Stat is enabled
- Lockout 250 Invalid Fan speed error response
- Lockout 252 Invalid Line frequency setting
- Lockout 253 Lead Lag modulation sensor not valid with setpoint source
- Lockout 254 Lead Lag modulation sensor not valid with local setpoint source
- Lockout 255 Lead Lag modulation sensor not valid with local modulation source
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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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