What It Means
El.compo.
Daikin Split & Multi-Split
Daikin Split & Multi-Split Error Code L3
Troubleshooting guide for the Daikin Split & Multi-Split system fault L3.
Possible Causes
- Fin temperature rise due to short circuit.
- Defective outdoor unit fan motor.
- Defective power transistor.
- Defective outdoor unit PCB.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
New to this code? Click to see why this happens
Full Diagnosis
El.compo. box temperature rise
All Recorded Causes
Fin temperature rise due to short circuit Defective outdoor unit fan motor Defective power transistor Defective outdoor unit PCB
Verify Before Replacing Parts
- Confirm the exact Daikin model family and split/ multi split context before acting on a generic code description.
- Start with the exact model documentation and verify the full operating sequence before replacing parts, particularly around fin temperature rise due to short circuit.
- Use the listed causes as branches to confirm or eliminate with measurements, not assumptions — defective outdoor unit fan motor is a reasonable second branch.
- After the correction, run the system long enough to confirm the split/ multi split fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Daikin Split & Multi-Split diagnostics step-by-step — so you confirm the cause before swapping parts.
