What it means
Daikin's US service manual calls it output overcurrent detection, and Daikin's global list calls it inverter instantaneous overcurrent (DC output). The system shuts down if the error keeps repeating, and Daikin gives the reset condition as about 11 minutes of continuous running without any other error.
What to check, in order
- Clear around the outdoor unit
Daikin lists poor installation conditions first, so make sure nothing is blocking the air around the outdoor unit.
- Reset at the breaker
Switch off the air conditioner's own breaker for 20 minutes, then switch on and restart.
- Call if it comes back
If the code returns, stop resetting it and book an engineer.
When to call an engineer
Daikin's service manual lists poor installation conditions, a closed stop valve, a faulty power module, wrong internal wiring, an abnormal or out-of-specification supply voltage, a faulty outdoor control board and a faulty compressor.
A repair visit will usually check the compressor, its wiring and the inverter board that drives it.
- Note the model and serial number. They're on a label on the side of the indoor unit, and on the outdoor unit.
- Write down the exact code, and what the appliance was doing when it appeared.
- Check whether it's still under warranty. If it is, the repair may cost you nothing.
Quick answers
What does the Daikin L5 error code mean?
The inverter that drives the compressor has seen too much current, so it has cut out to protect itself and the compressor. Daikin's US service manual calls it output overcurrent detection, and Daikin's global list calls it inverter instantaneous overcurrent (DC output). The system shuts down if the error keeps repeating, and Daikin gives the reset condition as about 11 minutes of continuous running without any other error.
Can I fix Daikin L5 myself?
Engineer only (engineer visit). Start with: clear around the outdoor unit; reset at the breaker; call if it comes back. Daikin's service manual lists poor installation conditions, a closed stop valve, a faulty power module, wrong internal wiring, an abnormal or out-of-specification supply voltage, a faulty outdoor control board and a faulty compressor.
Is Daikin L5 worth repairing?
Get a quote first. The causes range from installation conditions to the inverter board or the compressor. Get a quote.
Checked against
- Daikin Service Manual SiUS042113E, FTXM-V / RXM-V inverter pair wall mounted type (manualslib copy of the Daikin PDF)
- Daikin Service Manual SiUS04-924_A, RXS / FTXS H-series inverter pair wall mounted type (PDF)
- Daikin: Simple Self-Diagnosis by Malfunction Code, SM-TS3, list of error codes (PDF)
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.