HVACopediaMidea · Mini-split · Defrost
Defrost mode
What happens, in order
- Control watches T3, T4 and compressor run time to decide when to defrost
- In defrost the compressor keeps running while the indoor and outdoor fans stop
- Defrost light on the indoor unit comes on and the defrost symbol shows on the display
- Defrost ends and heating resumes when T3 rises above TCDE1, or T3 stays above TCDE2 for 80 s, or the unit has been in defrost for 15 minutes
Timings and thresholds
| Item | Value |
|---|---|
| T3 above TCDE2 hold time | 80 s |
| Max defrost time | 15 min |
Codes you may see during this
Applies to: Midea / Carrier DLFSHB high wall indoor unit
Models
DLFSHB
More Midea mini-split sequences
Related
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Source: Midea-Carrier DLFSHB service manual MS-DLFSHB-01, Defrosting Mode. Written in our own words; timings can differ by model and software version, so check the manual for your exact unit.
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.