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Panasonic · Heat pumps · Panasonic Aquarea Bi-bloc (split), generation L (R290)

F25Cooling/Heating cycle changeover abnormality

Name in the manufacturer's documentation (service manual): Cooling/Heating cycle changeover abnormality[1]

In plain words (editorial)

The valve that switches between heating and cooling (the 4-way valve) did not end up in the right position for the current mode. The service manual lists the valve, a sensor, a connector or the PCB.

When to call a service technician: Call the installer – the checks are done inside the unit.

✎ 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] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 190 manufacturer document – copy from a distributor quote verified F25 Cooling/Heating cycle changeover abnormality
  2. [2] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 228 manufacturer document – copy from a distributor quote verified 1 During heating operation, when the indoor pipe temperature of thermostat ON indoor unit < 0°C. 2 During cooling operation, when the indoor pipe temperature of thermostat ON indoor unit > 45°C.
  3. [3] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 228 manufacturer document – copy from a distributor quote verified Continue 4 times in 30 minutes.
  4. [4] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 228 manufacturer document – copy from a distributor quote verified Faulty sensor.
  5. [5] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 228 manufacturer document – copy from a distributor quote verified Faulty connector connection.
  6. [6] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 228 manufacturer document – copy from a distributor quote verified Faulty outdoor unit PCB (noise filter/main).
  7. [7] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 228 manufacturer document – copy from a distributor quote verified Faulty four way valve.
  8. [8] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 228 manufacturer document – copy from a distributor quote verified always switch off the power before remove and connect the component.