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Carrier · Mini-split

P2 Compressor top overheat (OLP)

High severity Carrier DLCM(R/H)B multi-zone outdoor

What the control is telling you

Same fault as PC02. Shown on the 48K high heat model.

Applies to: DLCMHBH48EAK (48K high heat) only

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. Check indoor and outdoor airflow clear the inlets, outlets and coils.
  3. Leave power off 10 minutes so the compressor cools, then check whether the top is still above 194 F (90 C).
  4. Check the overload protector (OLP) plug and wiring. With the compressor cool, the OLP should read 0 ohms; open = replace the OLP.
  5. Check the refrigerant side for a leak or restriction and repair.
  6. If OLP and system are good, replace the outdoor control PCB.

Models that show this code

7 models in Carrier DLCM(R/H)B multi-zone outdoor

DLCMHBH24CAKDLCMHBH30DAKDLCMHBH36DAKDLCMHBH48EAKDLCMRBH18BAKDLCMRBH36DAKDLCMRBH48EAK

Other codes on the same units

  • LC06 IPM high temperature / PFC frequency limit
  • P0 Inverter module (IPM) fault
  • P1 Over or under voltage protection
  • P3 Low outdoor temperature cut-off in heating
  • P4 Compressor drive fault
  • P7 IPM temperature sensor fault
  • PC00 Inverter module (IPM) protection
  • PC0A Condenser high 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 24 Outdoor Unit Error Display (48 High Heat only) p.27; diagnosis p.69. 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.