HVACopediaGree · Mini-split · Cooling
Cooling and dry mode (multi-zone)
What happens, in order
- Compressor is stopped and one indoor unit reaches its cooling condition: the expansion valve, outdoor fan and compressor start
- The outdoor fan starts 5 s before the compressor and runs high for 3 minutes, then goes to its set speed; each speed is held at least 80 s
- When some indoor units are satisfied the compressor keeps running at the frequency required; satisfied units get their expansion valve closed
- When all indoor units are satisfied the compressor stops at once and the outdoor fan stops after 1 minute
- Switching to heating the 4-way valve is energized after the compressor has been stopped 2 minutes
- 4-way valve is off in cooling
- Dry mode follows the cooling start and stop rules; capacity demand per indoor unit is capped at 90 percent of its cooling value
Timings and thresholds
| Item | Value |
|---|---|
| Outdoor fan lead | 5 s before compressor |
| Outdoor fan high-speed period | 3 min |
| Minimum time per fan speed | 80 s |
| Outdoor fan run-on | 1 min |
| 4-way valve change delay | 2 min after compressor stop |
Applies to: Gree Multi21+ multi-zone heat pump outdoor units
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 with protections · Cooling
- Cooling mode · Cooling
Related
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Source: Gree Multi21+ multi-zone service manual (MULTI18-24HP230V1CO), Function and Control sections 1 and 2. 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.