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Gree · Heat pump

dd Wiring/EEV check running (status)

Low severity Gree Multi21+

What the control is telling you

Not a fault. The outdoor unit is checking zone wiring and expansion valves.

Applies to: Gree Multi21+ 18-24k multi-zone (MULTI..HP230V1CO)

Test and repair steps

  1. Wait for the check to finish; if dn follows, fix the zone wiring or EEV.

Models that show this code

2 models in Gree Multi21+

MULTI18HP230V1COMULTI24HP230V1CO

Other codes on the same units

  • HC PFC protection
  • LC Compressor failed to start
  • LP Indoor and outdoor units do not match
  • Ld Compressor phase loss
  • PH DC bus voltage too high
  • PL DC bus voltage too low
  • PU DC bus capacitor charging fault
  • dn Wrong interconnect wiring or EEV fault

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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.