What It Means
- Discharge sensor fault
Lennox Split & Multi-Split
Lennox Error Code DS2 OFF, DS1 FAST FLASH
Split & Multi-Split:
Causes & actions from Lennox
How it shows
- defrost control ds2 ds1 led: DS2 OFF, DS1 FAST FLASH (ds1: flashing (fast), ds2: off)
Discharge sensor fault: Some heat pump units do not use a defrost line sensor. However, on these units a resistor is installed across pins P4-1 and P4-2. If the resistor is missing or damaged then this fault code will be displayed.
Applicable models & manual sources
- XP15
Discharge sensor fault
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.
