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Gree · Heat pump

E3 Low pressure protection

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

What the control is telling you

The system stopped on low suction pressure (GMV6: suction below about 10 psi saturation). On the Multi21+ the code is listed as reserved.

Applies to: Gree 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

  • Refrigerant leak or undercharge
  • Service valves not fully open
  • Dirty coils, filters or blower wheel
  • Expansion valve not feeding or restriction in the line set
  • Faulty low-pressure switch or sensor
  • Very low outdoor temperature

Test and repair steps

  1. Make sure both service valves are fully open.
  2. Clean the filters, coils and blower wheel.
  3. With the unit off, compare static pressure with outdoor temperature; if pressure is low, leak-check, recover and weigh in the charge.
  4. Check for frost spots that point to a restriction or a stuck EEV.
  5. GMV6 compare the low-pressure transducer output with the Appendix 3 voltage chart; no 5 VDC feed to the sensor points to the main board.

Models that show this code

13 models in 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)MULTI18HP230V1COMULTI24HP230V1CO

Other codes on the same units

  • d9 Indoor jumper cap fault
  • E0 Outdoor unit fault (shown with another code)
  • E1 High pressure protection
  • E2 Indoor coil freeze protection (status)
  • E4 Compressor discharge temperature too high
  • E5 Overcurrent protection (whole unit)
  • E6 Indoor/outdoor communication fault
  • E7 Mode conflict between indoor units (status)

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Source: 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.