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Midea · Heat pump

LC06 Inverter module (IPM) high temperature protection

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

What the control is telling you

The IPM heat sink is overheating.

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

Likely causes

  • Poor airflow over the outdoor unit / blocked fan
  • High ambient with dirty coil
  • Heat sink loose or poor thermal contact
  • Board fault

Test and repair steps

  1. Warning: Turn off and lock out power at the outdoor disconnect and wait for the inverter capacitors to discharge before touching the outdoor board or compressor wiring.
  2. Clean the outdoor coil and clear obstructions; confirm the fan runs.
  3. Check installation clearances for hot-air recirculation.
  4. Check the IPM heat sink is secure.
  5. If the fault repeats with good airflow, replace the outdoor board.

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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.