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Gree · Heat pump

E1 High pressure protection

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

What the control is telling you

The system tripped on high refrigerant pressure (on the GMV6 the high-pressure transducer reached about 609 psi). The compressor stops; in cooling the indoor fan keeps running, in heating the whole unit shuts down.

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

  • Overcharge of refrigerant
  • Dirty coil, blocked filter or air path restricted at the indoor or outdoor unit
  • Outdoor fan not running or running slow
  • Very high ambient temperature or air recirculating at the condenser
  • Faulty high-pressure switch or transducer (GMV6)

Test and repair steps

  1. Clean the filters and both coils and clear anything blocking the outdoor unit discharge or intake.
  2. Confirm the outdoor fan (cooling) or indoor fan (heating) runs at normal speed.
  3. Check that the refrigerant charge matches the nameplate plus line-set adder; recover and weigh in if overcharged.
  4. Confirm the service valves are fully open and there is no restriction in the lines.
  5. GMV6 compare the high-pressure sensor voltage with the pressure/voltage chart in Appendix 3; replace the transducer if it disagrees with gauges.
  6. Restart and watch head pressure; the Multi21+ needs a power reset to clear a high-pressure lockout.

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

  • d5 Indoor coil middle pipe sensor open or shorted (20K)
  • d6 Indoor coil outlet pipe sensor open or shorted (20K)
  • d9 Indoor jumper cap fault
  • E0 Outdoor unit fault (shown with another code)
  • E2 Indoor coil freeze protection (status)
  • E3 Low pressure protection
  • E4 Compressor discharge temperature too high
  • E5 Overcurrent protection (whole unit)

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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.