Midea Mini-Split: Multi-zone: one room heats, another will not cool – DLC multi-zone
Multi-zone: one room heats, another will not cool - DLC multi-zone on a Midea mini-split: On a multi-zone system the indoor units cannot heat and cool at the same time.
Applies to: DLCM(R/H)B multi-zone outdoor units with DLFSHBH high wall indoor units (Midea, Carrier, Viessmann)
Common causes of multi-zone: one room heats, another will not cool - dlc multi-zone
- Mode conflict between indoor units
How to fix multi-zone: one room heats, another will not cool - dlc multi-zone: step by step
- Heating has priority. If unit A is cooling or on fan and unit B is set to heat, A shuts off and B heats.
- If A is heating and B is set to cool or fan, B goes to standby and A keeps heating.
- Set all running indoor units to the same mode (fan with cool is fine).
If the unit shows an error code, look it up: Midea Mini-Split codes
Models
Midea DLCM(R/H)B multi-zone outdoor
DLCMHBH24CAKDLCMHBH30DAKDLCMHBH36DAKDLCMHBH48EAKDLCMRBH18BAKDLCMRBH36DAKDLCMRBH48EAK
Midea DLFSHBH wall indoor (DLCM multi-zone)
DLFSHBH09XAKDLFSHBH12XAJDLFSHBH12XAKDLFSHBH18XAKDLFSHBH24XAK
Source: DLCMRBH/DLCMHBH Multi-Zone Outdoor Service Manual (sold as Midea, Carrier and Viessmann Vitocal 200-S; Viessmann doc 6225551-03, 12/2024), Indoor units mode conflict p.44. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.