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Panasonic · Heat pumps · Panasonic Aquarea Monobloc, generation H

F12Pressure switch activate

Name in the manufacturer's documentation (service manual): Pressure switch activate[1]

In plain words (editorial)

The refrigerant pressure rose too high and the high-pressure safety switch tripped several times. The service manual's causes include poor heat transfer (dirty heat exchanger, blocked air flow) and too little water flow.

When to call a service technician: If it repeats, call the installer; refrigerant work needs an F-gas technician.

✎ 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 – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 145 official manufacturer document quote verified F12 Pressure switch activate
  2. [2] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified During operation of cooling and heating, when pressure 4.5 MPa and above is detected by outdoor high pressure switch.
  3. [3] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Continue 4 times in 20 minutes.
  4. [4] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Dust accumulation on the outdoor unit heat exchanger.
  5. [5] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Air short circuit at outdoor unit.
  6. [6] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Faulty water pump.
  7. [7] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Insufficient water flow rate in system.
  8. [8] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Water leak in system.
  9. [9] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified 2/3 way valve closed.
  10. [10] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Clogged expansion valve or strainer.
  11. [11] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Excessive refrigerant.
  12. [12] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Faulty outdoor high pressure sensor and switch.
  13. [13] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 173 official manufacturer document quote verified Faulty outdoor unit PCB.