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Gree · Heat pump

H7 Compressor lost synchronism

High severity Gree SapphireGree Livo GEN4Gree Vireo GEN3Gree Multi21+

What the control is telling you

The inverter lost track of the compressor rotor position.

Applies to: Gree Sapphire 9-24k (SAP..HP230V1A), Livo GEN4 30-36k (4LIV..HP230V1A), Vireo GEN3 9-24k (3VIR..HP115/230V1A), Multi21+ 18-24k multi-zone (MULTI..HP230V1CO)

Likely causes

  • Compressor off less than 3 min (pressures not equalized)
  • Compressor U/V/W wiring loose or wrong sequence
  • Supply voltage abnormal
  • Overcharge or high pressure
  • Outdoor fan not running or poor airflow
  • Compressor or board fault

Test and repair steps

  1. Let the compressor stay off at least 3 min before restart.
  2. Check compressor wire connections and phase order.
  3. Check supply voltage.
  4. Correct an overcharge and clean the coils.
  5. Check the outdoor fan, its plug and capacitor.
  6. Replace AP1, then the compressor, if the code persists.

Models that show this code

14 models in Gree Sapphire, Gree Livo GEN4, Gree Vireo GEN3, Gree Multi21+

3VIR09HP115V1A3VIR09HP230V1A3VIR12HP115V1A3VIR12HP230V1A3VIR18HP230V1A3VIR24HP230V1A4LIV30HP230V1AH4LIV36HP230V1AHMULTI18HP230V1COMULTI24HP230V1COSAP09HP230V1AHSAP12HP230V1AHSAP18HP230V1AHSAP24HP230V1AH

Other codes on the same units

  • F8 Compressor slowed - high current
  • F9 Compressor slowed - high discharge temperature
  • H0 Compressor slowed - high indoor coil temp in heating
  • H1 Defrost or oil return (status)
  • H3 Compressor overload protection
  • H4 System abnormal (overload)
  • H5 IPM (inverter module) protection
  • H6 Indoor fan motor not running / no feedback

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Source: Gree Sapphire 9-12k (SAP09-12HP230V1A) service.pdf - section 9.1 Error Code List / 9.2 Procedure of Troubleshooting; Gree Sapphire 18-24k (SAP18-24HP230V1A) service.pdf - section 9.1 Error Code List / 9.2 Procedure of Troubleshooting; Gree Livo GEN4 30-36k (4LIV30-36HP230V1A) service.pdf - section 9.1 Error Code List / 9.2 Procedure of Troubleshooting; Gree Vireo GEN3 9-24k (3VIR..HP115-230V1A) service GREE_VIREOGEN3_SERVICE_090921.pdf - section 9.1 Error Code List / 9.2 Procedure of Troubleshooting; Gree Multi21+ multi-zone 18-24k (MULTI18-24HP230V1CO) service.pdf - section 9.1 Malfunction status sheet / 9.2 Malfunction Checking and Elimination. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.