Viessmann · Mini-split

FH 0d Fault - see outdoor unit

Menu / mode display Viessmann DLFSHB high wall indoor

What the display is showing

The indoor unit is flagging an outdoor unit fault. Read the code on the outdoor board (or press its check button) and look it up.

Applies to: DLFSHBH high wall indoor units 09-24K (Midea / Carrier / Viessmann) on DLC multi-zone or single-zone outdoor units

Models that show this code

5 models in Viessmann DLFSHB high wall indoor

DLFSHBH09XAKDLFSHBH12XAJDLFSHBH12XAKDLFSHBH18XAKDLFSHBH24XAK

Other codes on the same units

AP Wi-Fi pairing (AP mode)
CL Filter cleaning reminder / Active Clean
CP Remote switched off
E-C-O ECO mode
FC Forced cooling
FH 0P AP mode on / no Wi-Fi kit
FP Low-temperature heating (8 C mode)
LL Controls locked

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Source: Midea DLFSHBH09XAK indoor display table (photo, 2026-10-16); Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Display Function p.12. 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.