What It Means
- DC voltage or AC voltage low
Lennox Split & Multi-Split
Lennox Split & Multi-Split Error Code 20
Split & Multi-Split: Heat pump (outdoor)
Causes & actions from Lennox
How it shows
- el18kslv outdoor fault display: 20
- el18kslv pcb fault led: 20
Low voltage been detected by compressor drive module （ACvoltageloworDCBUSvoltagelow）
Applicable models & manual sources
- EL18KSLV
DC voltage or AC voltage low
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.
