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Daikin · Heat pumps · Daikin Altherma 3 R F (split heat pump, R32)

89-03Heat exchanger freeze-up protection activated during defrost (warning)

Name in the manufacturer's documentation (service manual): Heat exchanger freeze-up protection activated during defrost (warning)[1]

In plain words (editorial)

Warning: the freeze-up protection of the heat exchanger activated during defrost. The manual names a faulty outlet water thermistor (after the heat exchanger) or hydro PCB.

When to call a service technician: If the warning repeats, contact your installer.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 253 official manufacturer document quote verified 89-03 Heat exchanger freeze-up protection activated during defrost (warning)
  2. [2] Daikin – Service manual Daikin Altherma 3 R F + W, ESIE20-13C – 2022.09 (PDF copy on installer site cncpompyciepla.pl) (ESIE20-13C) , p. 24 manufacturer document – copy from a distributor quote verified faulty outlet water after heat exchanger thermistor.
  3. [3] Daikin – Service manual Daikin Altherma 3 R F + W, ESIE20-13C – 2022.09 (PDF copy on installer site cncpompyciepla.pl) (ESIE20-13C) , p. 24 manufacturer document – copy from a distributor quote verified faulty hydro pcb.
  4. [4] Daikin – Service manual Daikin Altherma 3 R F + W, ESIE20-13C – 2022.09 (PDF copy on installer site cncpompyciepla.pl) (ESIE20-13C) , p. 24 manufacturer document – copy from a distributor quote verified perform a check of the outlet water after heat exchanger thermistor.
  5. [5] Daikin – Service manual Daikin Altherma 3 R F + W, ESIE20-13C – 2022.09 (PDF copy on installer site cncpompyciepla.pl) (ESIE20-13C) , p. 24 manufacturer document – copy from a distributor quote verified perform a check of the hydro pcb.