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

7H-01Water flow problem

Name in the manufacturer's documentation (service manual): Water flow problem[1]

In plain words (editorial)

The water flow through the heat pump is lower than the minimum required, so the indoor unit stops. According to the manual, the unit stops temporarily and the error resets automatically after some time. Things the manual says to check: all shut-off valves fully open, a clean water filter, no air in the system (purge it), water pressure above 1 bar, an intact expansion vessel.

When to call a service technician: If the problem persists after these checks, the manual says to contact your dealer.

✎ 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 7H-01 Water flow problem
  2. [2] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 95 official manufacturer document quote verified When the flow is lower, the indoor unit will stop operation and display error 7H.
  3. [3] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 247 official manufacturer document quote verified All shut-off valves of the water circuit are completely open.
  4. [4] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 247 official manufacturer document quote verified The water filter is clean. Clean if necessary.
  5. [5] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 247 official manufacturer document quote verified There is no air in the system. Purge air if necessary.
  6. [6] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 247 official manufacturer document quote verified The water pressure is >1 bar.
  7. [7] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 247 official manufacturer document quote verified The expansion vessel is NOT broken.
  8. [8] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 247 official manufacturer document quote verified The resistance in the water circuit is NOT too high for the pump
  9. [9] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 247 official manufacturer document quote verified If the problem persists after you have conducted all of the above checks, contact your dealer.
  10. [10] Daikin Altherma 3 R F – ERGA04~08E + EHVH/X04+08S18+23E – Installer reference guide (4P629086-1D (2024.04)) , p. 256 official manufacturer document quote verified After some time, this error will reset automatically and the unit will resume operation.