What It Means
- During the oil return process, The LED displays “RO” or alternative displays between running frequency and “RO”(each displays 0.5s)
Lennox Split & Multi-Split
Lennox Error Code RO
Split & Multi-Split: Mini-split unit (outdoor)
Causes & actions from Lennox
How it shows
- corp1816 multizone outdoor display: RO
This manual entry does not list further causes or actions.
Applicable models & manual sources
- MPA
During the oil return process, The LED displays “RO” or alternative displays between running frequency and “RO”(each displays 0.5s)
MPA, MPB, MLA
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
