HVACopediaGree · Mini-split · Heating
Anti-cold-air indoor fan delay
What happens, in order
- Heating starts with the compressor on
- If indoor room temperature is below 24C (75.2F): with the coil at or below 40C (104F) and the indoor fan stopped, the fan waits 2 minutes then starts on low
- If the coil rises above 40C within those 2 minutes the fan starts on low right away, runs 1 minute, then goes to the set speed
- If the coil exceeds 42C (107.6F) during the low-speed minute or the 2-minute wait, the fan goes straight to the set speed
- If indoor room temperature is 24C or above: with the coil at or below 42C the fan runs on low, and after 1 minute moves to the set speed; if the coil passes 42C during that minute it moves to the set speed sooner
Timings and thresholds
| Item | Value |
|---|---|
| Fan wait (cool room, coil under 40C) | 2 min |
| Low speed run | 1 min |
| Coil thresholds | 40C / 42C (104F / 107.6F) |
| Room threshold | 24C (75.2F) |
Applies to: Gree Sapphire wall mini-split heat pumps
Models
More Gree mini-split sequences
- Compressor restart delay and minimum run time · Startup
- 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
- Cooling mode · 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.