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

LG Therma V: when to call service immediately, where to check water pressure and how to restart

Summary (editorial)

The manual lists situations that need immediate service, explains where to read the water pressure and how to restart the controller.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

From the manufacturer's documentation (English source wording, with page)

  1. The popup message is mainly displayed when an error occurred in the product[1]
  2. In the main screen, you can enter the monitoring screen by pressing [Back] button (for 4 Series)[2]
  3. Monitoring screen shows, among others, the water pressure[3]
  4. Error: problem which can stop system operation and can be resumed only after certificated professional’s check[4]
  5. In emergency operation automatic re-start is prohibited; user must restart the product after power reset when emergency operation has been running[5]
  6. For forced reset, press down [On/Off + Back] button for 5 seconds to restart the system[6]
  7. Anything abnormal such as burning smell, loud noise: stop the unit and turn the breaker off; never try to repair yourself or restart[7]
  8. Call the service immediately: main power cord is too hot or damaged[8]
  9. Call the service immediately: error code is generated by self diagnosis[9]
  10. Call the service immediately: water leaks from unit[10]
  11. Call the service immediately: any switch, breaker (safety, earth) or fuse fails to work properly[11]
  12. Checks and inspections at regular intervals, preferably yearly, carried out by your local agreed technician[12]
  13. If the product is not used for long time, we strongly recommend not to switch off the power supply to the product[13]

⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.

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 – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 28 official manufacturer document quote verified the popup message is mainly displayed when an error occurred in the product.
  2. [2] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 29 official manufacturer document quote verified in the main screen, you can enter the monitoring screen by pressing [back] button
  3. [3] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 30 official manufacturer document quote verified - the water pressure
  4. [4] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 76 official manufacturer document quote verified error : problem which can stop system operation, and can be resumed only after certificated
  5. [5] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 77 official manufacturer document quote verified user must restart the product after power reset when emergency operation has
  6. [6] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 71 official manufacturer document quote verified for forced reset, press down [on/off + back] button for 5 seconds to restart the system.
  7. [7] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 80 official manufacturer document quote verified breaker off. never try to repair by yourself or restart the system in such cases.
  8. [8] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 80 official manufacturer document quote verified main power cord is too hot or damaged.
  9. [9] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 80 official manufacturer document quote verified error code is generated by self diagnosis.
  10. [10] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 80 official manufacturer document quote verified water leaks from unit.
  11. [11] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 80 official manufacturer document quote verified any switch, breaker (safety, earth) or fuse fails to work properly.
  12. [12] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 78 official manufacturer document quote verified should be carried out by your local agreed technician.
  13. [13] LG – Owner's manual Therma V R32 Monobloc (HM…M/MR, MFL68026705, EN) (MFL68026705) , p. 78 official manufacturer document quote verified recommend not to switch off the power supply to the product.