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Gree · Heat pump

E4 Compressor discharge temperature too high

High severity Gree SapphireGree Livo GEN4Gree Vireo GEN3Gree Multi21+Gree GMV6 Mini VRF

What the control is telling you

The discharge line got too hot (GMV6 trips above 244°F), so the compressor is stopped.

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), GMV6 Ultra Heat Mini VRF 36-60k (GMV-V..WL/C-T(U))

Likely causes

  • Low refrigerant charge or leak
  • EEV coil loose or valve not opening
  • Dirty coils or poor airflow at either unit
  • Service valves partly closed or restriction (strainer, capillary)
  • Discharge sensor bad or not seated on the pipe
  • Overload/high load running for a long time

Test and repair steps

  1. Wait about 30 min after shutdown, then check that the compressor overload (SAT/OVC) wire is connected; its resistance should be under 1 ohm when cool.
  2. Check the EEV coil plug and coil; replace the coil if open.
  3. Leak-check and verify the charge; repair and recharge to the nameplate amount.
  4. Clean coils and filters and clear the outdoor unit surroundings.
  5. Check that the discharge sensor is in its well and reads correctly against the chart.
  6. If everything checks good and the code returns, replace the outdoor board (AP1).

Models that show this code

17 models in Gree Sapphire, Gree Livo GEN4, Gree Vireo GEN3, Gree Multi21+, Gree GMV6 Mini VRF

3VIR09HP115V1A3VIR09HP230V1A3VIR12HP115V1A3VIR12HP230V1A3VIR18HP230V1A3VIR24HP230V1A4LIV30HP230V1AH4LIV36HP230V1AHGMV-V36WL/C-T(U)GMV-V48WL/C-T(U)GMV-V60WL/C-T(U)MULTI18HP230V1COMULTI24HP230V1COSAP09HP230V1AHSAP12HP230V1AHSAP18HP230V1AHSAP24HP230V1AH

Other codes on the same units

  • E0 Outdoor unit fault (shown with another code)
  • E1 High pressure protection
  • E2 Indoor coil freeze protection (status)
  • E3 Low pressure protection
  • E5 Overcurrent protection (whole unit)
  • E6 Indoor/outdoor communication fault
  • E7 Mode conflict between indoor units (status)
  • E8 High temperature / overload protection

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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; Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V36-48-60WL-C-T(U)) service.pdf - section Chapter 3 Faults, 4.1 Error Indication. 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.