PC49 Compressor over-current failure

What the control is telling you

The compressor drew too much current.

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

Likely causes

• High head pressure (dirty coil, fan, overcharge)
• Low supply voltage
• Compressor mechanical problem
• Drive 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 confirm fan operation.
3. Check supply voltage is within 187-253 V.
4. Check refrigerant charge.
5. Check compressor windings and wiring; replace compressor or drive board as indicated.

Settings for these units

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

Side letters taken from Fig. 8 drawing.

Units facing each other: 59 in. (150 cm) or more; do not blow into another unit's inlet.

Models that show this code

12 models in Midea DLCURA ducted single-zone inverter heat pump (outdoor)

Other codes on the same units

• PC40 Main chip to compressor-driver chip communication error
• PC42 Compressor start failure
• PC43 Compressor lack-phase protection
• PC44 Outdoor unit zero-speed protection
• PC45 Outdoor IR chip drive failure
• PC46 Compressor speed out of control
• PH90 Evaporator high temperature protection
• PH91 Evaporator low temperature protection