NTI · Boiler

Lockout 253 Lead Lag modulation sensor not valid with setpoint source

High severity Trinity Tft

What the control is telling you

Lead Lag modulation sensor not valid with setpoint source.

Applies to: Trinity Tft60, Tft85, Tft110, Tft154, Tft201, Tft285, Tft340, Tft399

Models that show this code

13 models in Trinity Tft

Tft110Tft154Tft155Tft175Tft200Tft201Tft250Tft285Tft300Tft340Tft399Tft60Tft85

Other codes on the same units

Lockout 249 STAT cannot be demand source when Remote Stat is enabled
Lockout 250 Invalid Fan speed error response
Lockout 251 Lead drop-stage on error setting does not match drop method configuration
Lockout 252 Invalid Line frequency setting
Lockout 254 Lead Lag modulation sensor not valid with local setpoint source
Lockout 255 Lead Lag modulation sensor not valid with local modulation source
Lockout 256 Selected Controller interaction enable setting is not allowed
Lockout 257 Controller interaction enable does not match neighbor stack fault setting

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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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