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Gree · Heat pump troubleshooting

Weak cooling or heating - Gree ductless

What is going on

Unit runs but room temperature is not reached.

Likely causes

  • Setpoint or fan speed too low
  • Dirty filter
  • Poor indoor/outdoor unit location
  • Refrigerant leak
  • 4-way valve fault (cold air in heating)
  • Capillary/EEV restriction
  • Service valve not fully open

Check in this order

  1. Check setpoint and set fan to high or medium.
  2. Clean the filter.
  3. Check installation clearances and shading of the outdoor unit.
  4. Compare supply air temperature and pressures with normal; low readings point to a leak or restriction.
  5. Open both service valves fully.
  6. Cold air in heating with good charge replace the 4-way valve.

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)

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Source: Gree Sapphire 9-12k (SAP09-12HP230V1A) service.pdf - section 9.3 Troubleshooting for Normal Malfunction; Gree Sapphire 18-24k (SAP18-24HP230V1A) service.pdf - section 9.3 Troubleshooting for Normal Malfunction; Gree Livo GEN4 30-36k (4LIV30-36HP230V1A) service.pdf - section 9.3 Troubleshooting for Normal Malfunction; Gree Vireo GEN3 9-24k (3VIR..HP115-230V1A) service GREE_VIREOGEN3_SERVICE_090921.pdf - section 9.3 Troubleshooting for Normal Malfunction; Gree Multi21+ multi-zone 18-24k (MULTI18-24HP230V1CO) service.pdf - section 9.3 Maintenance Method for Normal Malfunction. Written in our own words; check the manual for your exact model.

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.