HVACopediaGree · Heat pump
+ - + - + - Forced defrost request (remote key sequence)
What the display is showing
A service key sequence on the remote that forces a defrost cycle. While it runs the heating lamp shows the defrost pattern (on 10 s, off 0.5 s). Once the outdoor unit confirms, the indoor unit leaves the setting and normal heating resumes. If a fault or protection stop is active, the sequence only works after that clears.
Applies to: Vireo GEN3 9-24k (3VIR..HP115/230V1A)
What to do
- Turn the unit on in heating mode and set 16°C.
- Within 5 seconds press + - + - + - on the remote.
- The unit finishes the defrost and returns to normal heating by itself.
Models that show this code
6 models in Gree Vireo GEN3
Other codes on the same units
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Source: Gree Vireo GEN3 9-24k (3VIR..HP115-230V1A) service GREE_VIREOGEN3_SERVICE_090921.pdf - section 6.2 (9) compulsory defrosting function; outdoor 6. Compulsory defrosting. Summarized in our own words; check the original manual for your 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.