HVACopediaGree · Heat pump
oE Undefined outdoor unit error
What the control is telling you
A general outdoor fault. In cooling the indoor fan keeps running; in heating everything stops.
Applies to: Gree Sapphire 9-24k (SAP..HP230V1A), Livo GEN4 30-36k (4LIV..HP230V1A), Vireo GEN3 9-24k (3VIR..HP115/230V1A)
Likely causes
- Outdoor temperature outside range (below -20°C or above 60°C in cooling, above 30°C in heating)
- Compressor failed to start
- Compressor wires loose
- Compressor or main board failed
Test and repair steps
- Check the outdoor temperature against the operating range.
- Check compressor wiring.
- Check compressor windings and the outdoor board; replace the failed part.
Models that show this code
12 models in Gree Sapphire, Gree Livo GEN4, Gree Vireo GEN3
Other codes on the same units
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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. Summarized in our own words; check the original manual for your model.
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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.