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Panasonic · Heat pumps · Panasonic Aquarea Monobloc, generation H

H42Compressor low pressure abnormality

Name in the manufacturer's documentation (service manual): Compressor low pressure abnormality[1]

In plain words (editorial)

In heating mode the outdoor refrigerant pipe temperature went outside the expected range, which points to a problem in the refrigerant circuit or poor air flow at the outdoor unit.

When to call a service technician: Call a service technician with F-gas certification – this concerns the refrigerant circuit.

✎ 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 H42 Compressor low pressure abnormality
  2. [2] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 156 official manufacturer document quote verified During operation of heating and after 5 minutes compressor ON, when outdoor pipe temperature below -29°C or above 26°C is detected by the outdoor pipe temperature sensor.
  3. [3] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 156 official manufacturer document quote verified Dust accumulation on the outdoor unit heat exchanger.
  4. [4] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 156 official manufacturer document quote verified Air short circuit at outdoor unit.
  5. [5] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 156 official manufacturer document quote verified 2 way valve partially closed.
  6. [6] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 156 official manufacturer document quote verified Faulty outdoor unit fan motor.
  7. [7] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 156 official manufacturer document quote verified Refrigerant shortage (refrigerant leakage).
  8. [8] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 156 official manufacturer document quote verified Clogged expansion valve or strainer.
  9. [9] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 156 official manufacturer document quote verified Faulty outdoor pipe temperature sensor.
  10. [10] Service Manual – Mono Bloc Unit WH-MDC05H3E5 / 07 / 09 (PAPAMY1709003CE) , p. 156 official manufacturer document quote verified Faulty outdoor unit main PCB (main).