Home › Air Conditioners › Daikin › E5
Daikin Air Conditioner E5 Error Code
Compressor overload or lock-up protection. Here is what it means and how to clear it, easiest fix first.
The inverter compressor was stopped because it locked up, overheated or was working against an unusually high pressure difference. Causes range from loose compressor wiring and inverter board faults to a refrigerant-side problem or a failing compressor.
Some listings describe E5 as overload (OL) protection. Daikin uses this code across its residential split, SkyAir and VRV ranges, but the exact meaning and causes can vary by series, model year and region, so confirm it in your unit's manual. How to read it: most Daikin ductless wall units only blink the operation lamp. On remotes such as the ARC433 series, press and hold the timer Cancel button for roughly 5 seconds until 00 blinks on the screen, then press Cancel again one step at a time; when the indoor unit answers with a long continuous beep, the code showing is the stored fault. SkyAir and VRV wireless remotes use a different sequence with the Inspection/Test, up/down and MODE buttons, and wired wall controllers usually show the code on their screen.
How to fix Daikin E5
Clear around the outdoor unit
With the breaker off, remove leaves, grass clippings, snow or anything stored against the outdoor unit, and keep about 2 ft (60 cm) clear on all sides. Brush loose debris off the outside of the coil fins by hand or with a soft brush; do not use a pressure washer or bend the fins. A blocked outdoor coil makes the compressor work harder.
Reset the power at the breaker
Switch the system off with the remote, then turn off its circuit breaker in your home's main panel. Wait about 5 minutes, switch the breaker back on and restart the unit. Give the system its normal restart delay of a few minutes before judging the result.
When to call a technician
Repeated E5 codes need a technician to check the compressor, inverter board and refrigerant circuit. These parts carry high voltage even when the unit is off.
Parts that commonly cause E5
- compressor
- inverter board
Order parts by your exact model number so they fit.
Other Daikin air conditioner codes
- U4Indoor and outdoor units can't communicate
- U0Low refrigerant or restricted refrigerant flow
- U2Power supply voltage problem
- UAIndoor and outdoor units don't match
- A1Indoor unit control board fault
- A3Condensate water level too high
- A5Freeze-up or overheat protection
- A6Indoor fan motor fault
- C4Indoor coil temperature sensor fault
- C9Indoor room air temperature sensor fault
- E1Outdoor unit control board fault
- E6Compressor won't start
- E7Outdoor fan motor fault
- E8Compressor current too high
- F3Compressor discharge temperature too high
- F6High pressure in cooling mode
- H6Compressor position sensing error
- L4Inverter heat sink overheating
- L5Inverter output overcurrent
Frequently asked questions
What does E5 mean on a Daikin air conditioner?
The inverter compressor was stopped because it locked up, overheated or was working against an unusually high pressure difference. Causes range from loose compressor wiring and inverter board faults to a refrigerant-side problem or a failing compressor.
Can I fix Daikin E5 myself?
Only the basic checks. You can safely try the steps above, but E5 usually points to a part or fault that needs a technician.
What if E5 keeps coming back?
A code that returns after a reset and the checks above usually means a part is wearing out. Note when E5 appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.
Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.