HVACopediaKinghome · Heat pump
E2 Indoor coil anti-freeze protection
What the control is telling you
The indoor coil got cold enough to trigger freeze protection in cooling or drying mode, so the compressor and outdoor fan stop while the indoor fan keeps running.
Applies to: Kinghome KM09HT1DI, KM12HT1DI, KM18HT1DI, KM24HT1DI wall mini-splits; Kinghome KM09HF1DI to KM24HF1DI wall mini-splits (Gree GFH..DA/DB)
Likely causes
- Poor return air at the indoor unit
- Abnormal indoor fan speed
- Dirty evaporator
Test and repair steps
- Clean the filter and evaporator.
- Make sure return air is not blocked.
- Check that the indoor fan runs at the proper speed.
- Check the refrigerant charge if the coil still freezes.
Models that show this code
9 models in Kinghome KM HT1DI, Kinghome KM HF1DI
Other codes on the same units
- C5 Jumper cap missing or wrong
- E1 High pressure protection / high-pressure sensor fault
- E3 Low pressure protection / low-pressure sensor fault
- E4 Compressor discharge temperature too high
- E5 Overcurrent protection
- E6 Indoor/outdoor communication fault
- E8 High temperature resistance (overload) protection
- E9 Water overflow protection
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Source: Kinghome KM09-12-18-24HT1DI service manual, sec. 9.1 error code list; Kinghome KM09-24HF1DI service manual, sec. 11.1 error code list. 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.