Midea · Heat pump

PC06 Compressor discharge temperature protection

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

What the control is telling you

Discharge temperature is too high, so the compressor is stopped to protect it.

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

Likely causes

Low refrigerant charge / leak
Refrigerant restriction
Poor outdoor airflow
Faulty TP sensor reading high

Test and repair steps

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.
Check charge and leak-test the system.
Check the outdoor coil and fan.
Check the line set for kinks or restrictions; check line length vs. charge (18K: 24.6 ft before adding charge, 0.69 oz/ft beyond).
Check the TP sensor is attached to the discharge line and reads correctly.

Settings for these units

Outdoor unit minimum clearances · Midea DLCURA ducted single-zone inverter heat pump (outdoor)

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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.