Daikin Mini-Split Error Codes
Error code guides for Daikin mini-split systems (Aurora / Fit / Emura). Select your error code for step-by-step diagnosis.
Daikin error code index
- A1 Error CodeIndoor unit PCB fault
- E3 Error CodeHigh pressure protection shutdown
- U4 Error CodeCommunication error indoor/outdoor
- Not Cooling But RunningDaikin runs but no cold air output
Before you start: quick resets
Many Daikin faults are triggered by a power fluctuation or temporary condition and will clear on a reset. Turn off the unit at the thermostat, cut power at the breaker for 60 seconds, restore power, then turn the unit back on. If the error returns immediately, the fault is real and you need to diagnose it. If it clears, run the unit for 30 minutes to confirm stability.
If the code returns or never clears: find your specific code in the list above for a targeted diagnosis guide.