Midea · Heat pump

EC07 Outdoor DC fan motor fault / speed out of control

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

What the control is telling you

The outdoor fan motor is not running or its speed cannot be controlled.

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

Likely causes

Fan blade blocked by ice, debris or obstruction
Fan motor connector loose
Failed DC fan motor
Outdoor board fan driver fault

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 that the fan turns freely and is not blocked by ice, snow or debris; clear the coil and fan area.
Reseat the fan motor plug on the outdoor board.
Inspect the fan motor wiring for damage.
Restart and watch the fan; replace the fan motor if it will not run with a good connection, otherwise suspect the outdoor board.

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.

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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.