What It Means
E8 is an overcurrent trip on the inverter compressor, detected when the outdoor PCB or inverter measures current draw beyond safe operating limits during startup or run.
Daikin Split & Multi-Split
Daikin Split & Multi-Split Error Code E8
Troubleshooting guide for the Daikin Split & Multi-Split system fault E8.
Possible Causes
- Compressor winding short or ground fault.
- Inverter main circuit capacitor degraded or failed.
- Power transistor (IGBT/IPM) on the outdoor unit PCB damaged.
- Compressor mechanically locked or seized.
- Refrigerant overcharge or restriction causing abnormal discharge pressure and current draw.
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.
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Full Diagnosis
E8 is an overcurrent trip on the inverter compressor, detected when the outdoor PCB or inverter measures current draw beyond safe operating limits during startup or run. The entire outdoor unit shuts down, and on a multi-split system every indoor unit tied to that outdoor unit loses cooling/heating since they share the single compressor. E8 differs from E5 (motor lock/overheat) and E6 (standard, non-inverter compressor overcurrent) in that it specifically targets inverter-driven compressor circuits and often points to the inverter's power stage rather than the compressor windings alone.
All Recorded Causes
Compressor winding short or ground fault. Inverter main circuit capacitor degraded or failed. Power transistor (IGBT/IPM) on the outdoor unit PCB damaged. Compressor mechanically locked or seized. Refrigerant overcharge or restriction causing abnormal discharge pressure and current draw. Loose or corroded compressor terminal (UVW) connections.
Verify Before Replacing Parts
- Confirm the exact Daikin model family and split/ multi split context before acting on a generic code description.
- Confirm board LEDs, wiring polarity, and model compatibility before replacing control boards — this Daikin fault points at compressor winding short or ground fault.
- Check for intermittent communication faults caused by connectors, moisture, or damaged harnesses, and rule out inverter main circuit capacitor degraded or failed.
- 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.
