Midea · Mini-split

PH91 Evaporator coil too cold

Medium severity Midea DLCM(R/H)B multi-zone outdoorMidea DLFSHBH wall indoor (DLCM multi-zone)

What the control is telling you

Indoor coil temperature too low (cooling). The manuals give no flow chart; it is a protection stop.

Applies to: DLCM(R/H)B multi-zone outdoor units with DLFSHBH high wall indoor units (Midea, Carrier, Viessmann)

Models that show this code

12 models in Midea DLCM(R/H)B multi-zone outdoor, Midea DLFSHBH wall indoor (DLCM multi-zone)

DLCMHBH24CAKDLCMHBH30DAKDLCMHBH36DAKDLCMHBH48EAKDLCMRBH18BAKDLCMRBH36DAKDLCMRBH48EAKDLFSHBH09XAKDLFSHBH12XAJDLFSHBH12XAKDLFSHBH18XAKDLFSHBH24XAK

Other codes on the same units

PC49 Compressor over-current
PCA1 Refrigerant pipe condensation protection
PH09 Anti-cold-air in heating
PH90 Evaporator coil too hot
-- Indoor units mode conflict
AP Wi-Fi pairing (AP mode)
CL Filter cleaning reminder / Active Clean
CP Remote switched off

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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; Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Table 9 p.17. 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.