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Viessmann · Mini-split

P3 Low outdoor temperature cut-off in heating

Low severity Viessmann Vitocal 200-S DLCM(R/H)B multi-zone outdoor

What the control is telling you

Outdoor air below the heating range; the unit restarts when it warms up. Shown on the 48K high heat model.

Applies to: DLCMHBH48EAK (48K high heat) only

Test and repair steps

  1. Check the actual outdoor temperature.
  2. If it shows in normal weather, check the T4 sensor (see F1).

Models that show this code

7 models in Viessmann Vitocal 200-S DLCM(R/H)B multi-zone outdoor

DLCMHBH24CAKDLCMHBH30DAKDLCMHBH36DAKDLCMHBH48EAKDLCMRBH18BAKDLCMRBH36DAKDLCMRBH48EAK

Other codes on the same units

  • P0 Inverter module (IPM) fault
  • P1 Over or under voltage protection
  • P2 Compressor top overheat (OLP)
  • P4 Compressor drive fault
  • P7 IPM temperature sensor fault
  • PC00 Inverter module (IPM) protection
  • PC0A Condenser high temperature protection
  • PC0F PFC module 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.27. 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.