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Carrier · Mini-split

ODU P5 Condenser high temperature (outdoor board)

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

What the control is telling you

Outdoor board display. Indoor shows PC0A.

Applies to: DLCMRBH / DLCMHBH multi-zone outdoor units 18-48K (Midea, Carrier, Viessmann Vitocal 200-S)

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 the condenser (T3) sensor connection and resistance (about 10 kOhm at 77 F).
  3. If outdoor air is above 122 F (50 C), the unit is outside its range: shut it down.
  4. Check outdoor airflow, clean the coil, and make sure the outdoor fan runs (see EC07 if not).
  5. Check the charge. If low, find the leak and add refrigerant. If all good, replace the outdoor main board.

Models that show this code

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

DLCMHBH24CAKDLCMHBH30DAKDLCMHBH36DAKDLCMHBH48EAKDLCMRBH18BAKDLCMRBH36DAKDLCMRBH48EAK

Other codes on the same units

  • ODU P0 Compressor top overheat (outdoor board)
  • ODU P1 High pressure protection (outdoor board)
  • ODU P2 Low pressure protection (outdoor board)
  • ODU P3 Current overload (outdoor board)
  • ODU P4 Discharge temperature protection (outdoor board)
  • ODU P6 Inverter module (IPM) fault (outdoor board)
  • ODU PH Compressor pre-heat
  • ODU RO Oil return cycle

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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 27 Outdoor Unit Digital Codes p.32; diagnosis p.67. 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.