Viessmann · Mini-split

ODU PH Compressor pre-heat

Normal status Viessmann Vitocal 200-S DLCM(R/H)B multi-zone outdoor

What the display is showing

Compressor crankcase pre-heating is on.

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

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

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 P5 Condenser high temperature (outdoor board)
ODU P6 Inverter module (IPM) fault (outdoor board)
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), Outdoor Unit Digital Display p.28; Automatic Wiring/Piping Correction p.6. Summarized in our own words; check the original manual for your model.

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.