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LG · Heat pumps · LG Therma V Monobloc (air-to-water heat pump)

CH14Problem in flow switch

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

In plain words (editorial)

Flow switch problem: the flow switch is open while the internal water pump runs, so there is not enough water flow. The manual lists the pump capacity set to minimum, insufficient air purging and a missing or wrongly adjusted bypass valve; it asks to check that the shut-off valves are open, clean the strainer if needed and check the pressure gauge.

When to call a service technician: If the valves are open and the pressure is fine, 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] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 277 official manufacturer document quote verified 14 Problem in flow switch
  2. [2] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 277 official manufacturer document quote verified Flow switch should be closed
  3. [3] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 277 official manufacturer document quote verified Flow switch is open while internal
  4. [4] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 73 official manufacturer document quote verified To secure enough water flow rate, do not set water pump capacity as Minimum.
  5. [5] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 132 official manufacturer document quote verified air purge is not performed sufficiently it may occur CH14
  6. [6] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 270 official manufacturer document quote verified If water flow rate is low, flow switch error (CH14) can be occurred.
  7. [7] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 270 official manufacturer document quote verified Two shut-off valves (located at the end of water inlet pipe and water outlet pipe
  8. [8] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 276 official manufacturer document quote verified Check if strainer gathers too much particles. If so, strainer
  9. [9] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 276 official manufacturer document quote verified Check if water pipe is getting closed due to stacked particles
  10. [10] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 276 official manufacturer document quote verified Check if pressure gage indicates above 0.3 Bar.