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Midea · Heat pump

PC08 Outdoor over-current protection

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

What the control is telling you

Total outdoor unit current is too high.

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

Likely causes

  • Low supply voltage
  • High head pressure (dirty coil, fan problem, overcharge)
  • Compressor mechanical problem
  • 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. Check supply voltage is within 187-253 V under load.
  3. Clean the outdoor coil and confirm the fan runs.
  4. Check refrigerant charge is not excessive.
  5. Check compressor amp draw and wiring; refer to the service manual for compressor tests.

Settings for these units

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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.