Daikin mini split error code E8

Common causes

• A dirty outdoor coil or failed fan.
• Low supply voltage.
• A refrigerant overcharge.
• A failing compressor.

How to fix it yourself

Work through the checks below first; they resolve most cases. If they do not, the repair itself may need a technician.

1. Look at the outdoor unit: clear leaves, cottonwood fluff, snow or ice from the coil and make sure the fan can spin freely and nothing is stacked against the cabinet.
2. If you own a multimeter and are comfortable using it, measure the supply voltage at the outdoor unit's L1 and L2 terminals with the unit running. A 230 V system should read roughly 208 to 253 VAC.
3. Reset the system: switch the breaker (or the outdoor disconnect) off, wait a full five minutes so the boards fully discharge, then switch it back on and restart from the remote.

Switch off power at the breaker before opening either unit. Capacitors in the outdoor unit hold a charge for several minutes after power is cut.

When to call a technician

If the coil is clean and voltage is normal, a technician should check compressor current.

Which Daikin units show E8

This page applies to Daikin Aurora, 19 Series, Atmosphera, Emura, Quaternity and MXS multi-zone units. Daikin's own documentation lists E8 as "Input over-current protection", the same definition used across the Daikin it is built on. If your unit shows a code with a different shape (for example a four-character code, or a plain number), it is from a different table; use the lookup with your exact code.

Where Daikin shows this code

Most Daikin wall units do not show the code on the unit; the operation lamp blinks. To read the code, point the remote at the unit, hold CANCEL (or Timer Cancel) for about 5 seconds until 00 shows, then press CANCEL repeatedly. Each press shows a code; when the unit gives a long continuous beep instead of two short beeps, the code on the remote is the stored fault. Units with a wired controller show the code directly. A and C codes are indoor-unit faults, E, F, H, J, L and P codes are outdoor-unit faults and protections, and U codes are system-level problems such as communication, power supply and refrigerant shortage.

Other Daikin codes

Same part of the system as E8:

All Daikin error codes

E8 on other brands

The same characters do not always mean the same thing. Check the brand on your unit.

• Pioneer E8 Outdoor fan speed fault (outdoor display)
• Blueridge E8 High temperature protection (overheating)
• Zone Air E8 Outdoor discharge temperature sensor fault (open or short circuit)
• Mitsubishi Electric E8 Communication error between indoor and outdoor units
• Trane E8 Outdoor discharge temperature sensor fault (open or short circuit) / Communication error between indoor and outdoor units
• Goodman E8 Input over-current protection