Skip to content
EN

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

H21Abnormal water pressure

Name in the manufacturer's documentation (service manual): Abnormal water pressure[1]

In plain words (editorial)

The unit detected abnormal water pressure in the heating circuit.

When to call a service technician: Check the system pressure gauge if you have one; topping up or bleeding is done as described by your installer. If the code stays, call the 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] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 189 manufacturer document – copy from a distributor quote verified H21 Abnormal water pressure
  2. [2] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 194 manufacturer document – copy from a distributor quote verified During operation of cooling and heating, the water pressure detected by the indoor water pressure sensor is used to determine water pressure error.
  3. [3] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 194 manufacturer document – copy from a distributor quote verified Continue for 180 seconds (but no judgment for 70 seconds after Water pump startup/restart).
  4. [4] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 194 manufacturer document – copy from a distributor quote verified Faulty water pump.
  5. [5] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 194 manufacturer document – copy from a distributor quote verified Water leak in system.
  6. [6] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 194 manufacturer document – copy from a distributor quote verified Faulty connector connection.
  7. [7] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 194 manufacturer document – copy from a distributor quote verified Faulty water pressure sensor.
  8. [8] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 194 manufacturer document – copy from a distributor quote verified Faulty indoor unit PCB (main).
  9. [9] Service Manual – WH-SDC0509L3E5 / L6E5 + WH-WDG05/07/09LE5 (R290) (PAPAMY2307068CE) , p. 194 manufacturer document – copy from a distributor quote verified always switch off the power before remove and connect the component.