HVACopediaViessmann · Mini-split
FL14 Indoor and outdoor units not compatible
What the control is telling you
The outdoor unit sees an indoor unit it is not matched with.
Applies to: DLCMRBH / DLCMHBH multi-zone outdoor units 18-48K (Midea, Carrier, Viessmann Vitocal 200-S)
Likely causes
- Indoor model not approved for this outdoor unit
Test and repair steps
- Safety kill power at the disconnect and wait for the inverter capacitors to discharge before touching boards or wiring.
- Check the indoor model numbers against the outdoor unit's approved indoor list (compatibility table).
- Replace the mismatched indoor unit with an approved one.
Models that show this code
7 models in Viessmann Vitocal 200-S DLCM(R/H)B multi-zone outdoor
Other codes on the same units
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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 23 Outdoor Unit Error Display p.26. 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.