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

CH35Low pressure Error

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

In plain words (editorial)

The low pressure dropped excessively. The service manual names a defective low pressure sensor, fan, EEV, PCB or pipe sensor, refrigerant shortage or leakage, a damaged refrigerant pipe, covering or clogging of the unit (e.g. a clogged filter in heating mode) or a clogged service valve.

When to call a service technician: Make sure the unit is not covered or clogged; if the code repeats, contact an LG-authorised service technician or your 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. 278 official manufacturer document quote verified 35 Low pressure Error
  2. [2] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified Excessive decrease of low pressure
  3. [3] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified Defective low pressure sensor
  4. [4] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified Defective unit fan
  5. [5] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified Refrigerant shortage/leakage
  6. [6] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified Deformation because of damage of refrigerant pipe
  7. [7] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified Defective unit EEV
  8. [8] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified Covering / clogging (unit covering during the cooling mode / unit filter clogging during heating mode)
  9. [9] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified SVC valve clogging
  10. [10] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified Defective unit PCB(Inverter)
  11. [11] LG Therma V Monobloc – Installation manual (MFL68026607 Rev.21) (MFL68026607 Rev.21_062126) , p. 278 official manufacturer document quote verified Defective unit pipe sensor