Carrier · Mini-split

ODU -- Outdoor board standby

Normal status Carrier DLCM(R/H)B multi-zone outdoor

What the display is showing

Two dashes on the outdoor board = standby.

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

Models that show this code

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

DLCMHBH24CAKDLCMHBH30DAKDLCMHBH36DAKDLCMHBH48EAKDLCMRBH18BAKDLCMRBH36DAKDLCMRBH48EAK

Other codes on the same units

Fb Vapor injection inlet sensor fault
Fd Vapor injection outlet sensor fault
ODU 00 Wiring / piping check finished
ODU CE Automatic wiring / piping check running
ODU E0 Outdoor EEPROM error (outdoor board)
ODU E2 Indoor / outdoor communication error (outdoor board)
ODU E3 IPM to main board communication error (outdoor board)
ODU E4 Outdoor or T2B sensor fault (outdoor board)

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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.