HVACopediaGree · Mini-split · Freeze protection
Indoor coil anti-freeze protection
What happens, in order
- Control detects a frozen or near-frozen indoor coil in cooling or dry mode
- Compressor stops and the outdoor fan stops after 30 s
- Indoor fan and swing motor carry on in their previous state
- When the coil has thawed and the compressor has been off for at least 3 minutes, the unit resumes its previous mode
Timings and thresholds
| Item | Value |
|---|---|
| Outdoor fan run-on | 30 s |
| Minimum off time before restart | 3 min |
Applies to: Gree Sapphire wall mini-split heat pumps
Models
More Gree mini-split sequences
- Compressor restart delay and minimum run time · Startup
- Anti-cold-air indoor fan delay · Heating
- Heating mode · Heating
- Heating mode (outdoor logic) and special modes · Heating
- Heating mode and anti-cold-air · Heating
- Heating, defrost, oil return and mode conflict · Heating
- Cooling and dry mode (multi-zone) · Cooling
- Cooling and dry mode with protections · Cooling
Related
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Source: Gree Sapphire 9-12k service manual (SAP09-12HP230V1A), Technical Information - Function and Control; Gree Sapphire 18-24k service manual (SAP18-24HP230V1A), same section. Written in our own words; timings can differ by model and software version, so check the manual for your exact unit.
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.