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Kinghome · Heat pump

E6 Indoor/outdoor communication fault

High severity Kinghome KM HEDIKinghome KM HT1DIKinghome KM HF1DI

What the control is telling you

The indoor and outdoor boards are not exchanging data. On cooling the compressor stops while the indoor fan runs; in heating the unit stops.

Applies to: Kinghome KM09HEDI, KM12HEDI, KM18HEDI wall mini-splits; Kinghome KM09HT1DI, KM12HT1DI, KM18HT1DI, KM24HT1DI wall mini-splits; Kinghome KM09HF1DI to KM24HF1DI wall mini-splits (Gree GFH..DA/DB)

Likely causes

  • Interconnecting wiring loose, wrong or damaged
  • Neutral/power problem at the outdoor board
  • Faulty indoor or outdoor mainboard or filter board

Test and repair steps

  1. Power down and verify the indoor-to-outdoor wiring matches the wiring diagram.
  2. Look for damaged or loose communication wire; replace if damaged.
  3. Check that the outdoor board gets its power input.
  4. Replace the outdoor filter plate or mainboard, then the indoor mainboard, if the fault remains.

Models that show this code

12 models in Kinghome KM HEDI, Kinghome KM HT1DI, Kinghome KM HF1DI

KM09HEDIKM09HF1DIKM09HT1DIKM12HEDIKM12HF1DIKM12HT1DIKM18HEDIKM18HF1DIKM18HT1DIKM21HF1DIKM24HF1DIKM24HT1DI

Other codes on the same units

  • E2 Indoor coil anti-freeze protection
  • E3 Low pressure protection / low-pressure sensor fault
  • E4 Compressor discharge temperature too high
  • E5 Overcurrent protection
  • E8 High temperature resistance (overload) protection
  • E9 Water overflow protection
  • F0 Refrigerant recovery mode
  • F1 Indoor room temperature sensor fault

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Source: Kinghome KM09-12-18HEDI service manual, sec. 9.3 status table and 9.4 troubleshooting; 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.