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Carrier · Mini-split

PC0L Outdoor temperature too low

Low severity Carrier DLCM(R/H)B multi-zone outdoorCarrier DLFSHB high wall indoor

What the control is telling you

Outdoor air is below the range the unit is allowed to run in, so it stops (protection, not a part failure). Outdoor board shows LP; 48K HH shows P3 in heating.

Applies to: DLCM(R/H)B multi-zone outdoor units with DLFSHBH high wall indoor units (Midea, Carrier, Viessmann)

Likely causes

  • Very low outdoor temperature

Test and repair steps

  1. Check the actual outdoor temperature.
  2. The unit restarts by itself when it warms up. If it keeps showing this in normal weather, check the T4 sensor (see EC53).

Models that show this code

12 models in Carrier DLCM(R/H)B multi-zone outdoor, Carrier DLFSHB high wall indoor

DLCMHBH24CAKDLCMHBH30DAKDLCMHBH36DAKDLCMHBH48EAKDLCMRBH18BAKDLCMRBH36DAKDLCMRBH48EAKDLFSHBH09XAKDLFSHBH12XAJDLFSHBH12XAKDLFSHBH18XAKDLFSHBH24XAK

Other codes on the same units

  • P7 IPM temperature sensor fault
  • PC00 Inverter module (IPM) protection
  • PC0A Condenser high temperature protection
  • PC0F PFC module protection
  • PC02 Compressor top overheat (OLP)
  • PC03 Pressure protection
  • PC04 Inverter compressor drive error
  • PC06 Discharge temperature protection

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Source: DLCMRBH/DLCMHBH Multi-Zone Outdoor Service Manual (sold as Midea, Carrier and Viessmann Vitocal 200-S; Viessmann doc 6225551-03, 12/2024), Table 23 Outdoor Unit Error Display p.26; Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Table 9 p.17. 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.