HVACopedia

Kinghome · Heat pump

C5 Jumper cap missing or wrong

Medium severity Kinghome KM HEDIKinghome KM HT1DIKinghome KM HF1DI

What the control is telling you

The mainboard does not see a valid jumper cap, so the remote and buttons are received but commands are not processed.

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

  • No jumper cap fitted
  • Cap inserted wrongly
  • Damaged cap
  • Faulty detection circuit on the board

Test and repair steps

  1. Check that a jumper cap is installed.
  2. Re-seat it firmly.
  3. Swap in a correct replacement cap.
  4. Replace the mainboard if the code stays.

Models that show this code

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

KM09HEDIKM09HF1DIKM09HT1DIKM12HEDIKM12HF1DIKM12HT1DIKM18HEDIKM18HF1DIKM18HT1DIKM21HF1DIKM24HF1DIKM24HT1DI

Other codes on the same units

  • E1 High pressure protection / high-pressure sensor fault
  • E2 Indoor coil anti-freeze protection
  • 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 KM09-12-18HEDI 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.