HVACopediaCarrier · Mini-split
ODU LP Low outdoor temperature protection (outdoor board)
What the control is telling you
Outdoor air below the operating range. Indoor shows PC0L.
Applies to: DLCMRBH / DLCMHBH multi-zone outdoor units 18-48K (Midea, Carrier, Viessmann Vitocal 200-S)
Test and repair steps
- Check the actual outdoor temperature.
- If it shows in normal weather, check the T4 sensor.
Models that show this code
7 models in Carrier DLCM(R/H)B multi-zone outdoor
Other codes on the same units
- ODU F5 Zone E coil outlet sensor (T2B-E) fault
- ODU F6 Zone F coil outlet sensor (T2B-F) fault
- ODU Hz readout Compressor running frequency
- ODU LC Low ambient cooling mode
- ODU P0 Compressor top overheat (outdoor board)
- ODU P1 High pressure protection (outdoor board)
- ODU P2 Low pressure protection (outdoor board)
- ODU P3 Current overload (outdoor board)
Save it for the next call
Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.
Source: DLCMRBH/DLCMHBH Multi-Zone Outdoor Service Manual (sold as Midea, Carrier and Viessmann Vitocal 200-S; Viessmann doc 6225551-03, 12/2024), Table 27 Outdoor Unit Digital Codes p.32; diagnosis p.32. 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.