HVACopediaNTI · Boiler
Alert 255 CH water temperature range was too small (minimum 12 C / 22 F)
What the control is telling you
CH water temperature range was too small (minimum 12 C / 22 F).
Applies to: Trinity Tft60, Tft85, Tft110, Tft155, Tft175, Tft200, Tft250, Tft300, Tft399
Models that show this code
13 models in Trinity Tft
Other codes on the same units
- Alert 251 CH max outdoor set point was invalid
- Alert 252 CH min outdoor setp oint was invalid
- Alert 253 CH min water set point was invalid
- Alert 254 CH outdoor temperature range was too small (minimum 12 C / 22 F)
- Alert 26 Lead Lag operation switch was turned ON
- Alert 261 DHW set point was invalid
- Alert 262 DHW time of day set point was invalid
- Alert 27 Safety processor was reset
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Source: NTI Tft60-399 Installation and Operation Instructions (rev. 2012-04-09), Sec. 15.0 Troubleshooting, Table 15-4. Summarized in our own words; check the original manual for your model.
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For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.