HVACopediaGree · Heat pump
E7 Mode conflict between indoor units (status)
What the control is telling you
Two or more heads are asking for opposite modes (cooling/dry vs heating, or fan vs heating). The first unit started sets the mode; heating wins over fan mode.
Applies to: Gree Multi21+ 18-24k multi-zone (MULTI..HP230V1CO)
Likely causes
- Indoor units set to different modes
Test and repair steps
- Set all heads to the same mode (or both to compatible modes).
- Explain to the customer that one outdoor unit cannot cool and heat at the same time.
Models that show this code
2 models in Gree Multi21+
Other codes on the same units
- E3 Low pressure protection
- E4 Compressor discharge temperature too high
- E5 Overcurrent protection (whole unit)
- E6 Indoor/outdoor communication fault
- E8 High temperature / overload protection
- F0 Low refrigerant / refrigerant blocked protection
- F1 Indoor room air sensor open or shorted
- F2 Indoor coil sensor open or shorted
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Source: Gree Multi21+ multi-zone 18-24k (MULTI18-24HP230V1CO) service.pdf - section 9.1 Malfunction status sheet / 9.2 Malfunction Checking and Elimination. Summarized in our own words; check the original manual for your model.
Homeowner looking at this code? See what it means for you and when to call a technician.
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.