HVACopedia

Midea · Heat pump

PH90 Evaporator high temperature protection

Medium severity Midea DLCURA ducted single-zone inverter heat pump (outdoor)

What the control is telling you

The indoor coil temperature is too high (normally in heating), so the unit protects itself.

Applies to: DLCURAH18-60 AAK/ABK single-zone heat pump outdoor units (18K-60K, regular and High Heat)

Likely causes

  • Low indoor airflow in heating - dirty filter, blower problem, closed registers
  • Overcharge
  • Indoor coil sensor fault

Test and repair steps

  1. Check/replace the indoor filter.
  2. Check indoor blower operation and ductwork/registers.
  3. Check refrigerant charge.
  4. Check the indoor coil temperature sensor.

Settings for these units

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

Open the app

Source: Midea/Carrier DLCURA Installation Instructions (Catalog DLCURA-03SI), Table 11 Outdoor Unit Diagnostic Codes, p.19. 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.