HVACopediaGree · Mini-split · Heating
Heating mode and anti-cold-air
What happens, in order
- Room at or below setpoint plus about 2C (start with heating): reversing valve, compressor and outdoor fan start together; indoor fan runs under the anti-cold-air rules
- Room reaches setpoint plus about 3C compressor stops, outdoor fan runs on 60 s, indoor fan blows 60 s on low then stops
- Reversing valve is energized in heating; setpoint range 61-86F
- Anti-cold-air with room below 75F coil at or below 104F and indoor fan stopped, so the fan waits 2 minutes then runs low; if the coil passes 104F sooner it starts low immediately, and after 1 minute on low goes to set speed
- If the coil exceeds 108F during the wait or the low-speed minute, the fan goes to set speed
- Current limiting uses the same 16/17/18/20 A steps as cooling
Timings and thresholds
| Item | Value |
|---|---|
| Residual heat blow | 60 s low |
| Outdoor fan run-on | 60 s |
| Fan wait | 2 min |
| Low speed run | 1 min |
| Coil thresholds | 104F / 108F |
Applies to: Gree Livo GEN4 wall mini-split heat pumps 30k-36k
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, 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 Livo GEN4 30-36k service manual (4LIV30-36HP230V1A), Technical Information - Function and Control. 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.