HVACopediaGree · Mini-split · Heating
Heating mode
What happens, in order
- Room temperature is at or below the set temperature plus 2C (3.6F), so the compressor, outdoor fan and reversing valve energize and the indoor fan runs under the anti-cold-air rules
- Between set temperature plus 2C and plus 5C (9F), the unit keeps its previous state
- At set temperature plus 5C or higher, the compressor stops, the outdoor fan runs on 30 s and the indoor fan blows residual heat on low for 60 s with the speed locked
- When the unit is switched off or changed to another mode, the reversing valve is de-energized after the compressor has stopped
- Compressor frequency is adjusted automatically with outdoor temperature
- With the compressor running and outdoor air at 20C (68F) or above, a low or medium indoor fan speed is raised to high; at 18C (64.4F) or below it returns to the set speed
Timings and thresholds
| Item | Value |
|---|---|
| Set temperature range | 16-30C (68-86F) |
| Start point | Set temperature plus 2C |
| Stop point | Set temperature plus 5C |
| Residual heat blow | 60 s low speed |
| Outdoor fan run-on | 30 s |
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 (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.