NTI · Boiler

Alert 48 Write large enumerated Modbus register value was not allowed

Low severity Trinity Tft

What the control is telling you

Write large enumerated Modbus register value was not allowed.

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

  • Alert 477 Internal error: Data too large was not written to EEPROM
  • Alert 478 Internal error: Safety key bit 0 was incorrect
  • Alert 479 Internal error: Safety key bit 1 was incorrect
  • Alert 48 Write large enumerated Modbus register value was not allowed
  • Alert 480 Internal error: Safety key bit 2 was incorrect
  • Alert 481 Internal error: Safety key bit 3 was incorrect
  • Alert 482 Internal error: Safety key bit 4 was incorrect
  • Alert 483 Internal error: Safety key bit 5 was incorrect

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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.