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Midea · Mini-split

EH03 Indoor fan speed out of range

High severity Midea DLFSHBH wall indoor (DLCM multi-zone)

What the control is telling you

Indoor fan stays too slow (about 300 RPM) or too fast (about 1500 RPM) long enough to stop the unit.

Applies to: DLFSHBH high wall indoor units 09-24K (Midea / Carrier / Viessmann) on DLC multi-zone or single-zone outdoor units

Likely causes

  • Wiring
  • Fan wheel blocked
  • Bad fan motor
  • Bad indoor PCB

Test and repair steps

  1. Safety kill power at the disconnect and wait for the inverter capacitors to discharge before touching boards or wiring.
  2. Restart after 2 minutes. If it clears, the unit is fine.
  3. With power off, turn the blower wheel by hand and clear anything that drags.
  4. Check the motor wiring.
  5. In standby measure at the motor plug pin 1 to 3 = 192-380 V DC on 208-230 V units (140-190 V on 115 V units); pin 4 to 3 = 13.5-16.5 V; pin 5 = 0-6.5 V; pin 6 = 13.5-16.5 V.
  6. Voltages wrong = replace the indoor PCB. Voltages right = replace the fan motor.

Models that show this code

5 models in Midea DLFSHBH wall indoor (DLCM multi-zone)

DLFSHBH09XAKDLFSHBH12XAJDLFSHBH12XAKDLFSHBH18XAKDLFSHBH24XAK

Other codes on the same units

  • EH00 Indoor EEPROM error
  • EH0A Indoor EEPROM error
  • EH0b Indoor PCB to display board communication error
  • EH02 Zero-crossing signal error
  • EH30 Indoor external fan low voltage
  • EH31 Indoor external fan over voltage
  • Eh60 Room sensor (T1) fault
  • Eh61 Indoor coil sensor (T2) fault

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Source: Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Table 9 p.17, p.28-29. 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.