HVACopediaNTI · Boiler
Alert 28 Application processor was reset
What the control is telling you
Application processor was reset.
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
- Alert 277 Abnormal Recycle: LCI off during Drive to Light off Rate
- Alert 278 Abnormal Recycle: LCI off during Pre-Ignition test
- Alert 279 Abnormal Recycle: LCI off during Pre-Ignition time
- Alert 28 Application processor was reset
- Alert 280 Abnormal Recycle: LCI off during Main Flame Establishing Period
- Alert 281 Abnormal Recycle: LCI off during Ignition period
- Alert 282 Abnormal Recycle: Demand off during Drive to Purge Rate
- Alert 283 Abnormal Recycle: Demand off during Measured Purge Time
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Source: NTI Trinity Tft399 Installation and Operation Manual (2018-09-07), Sec. 16.0 Troubleshooting, Table 16-4. 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.