Arcoaire mini split error code E2
2 meanings on Arcoaire, depending on which series you have. Check the model number on the indoor unit's label.
If yours is a DLC/DLF series, 2015 and later (Midea-built) unit
Zero-crossing signal detection error.
- TypeFault
- SystemControl board
- Can I fix it?Homeowner checks, then maybe a tech
What E2 means on a Arcoaire
The indoor board times its fan and power circuits off the zero-crossing point of the AC supply. It lost that reference signal, which points to a power-quality problem or a board fault.
On this platform, E2 is a fault: something has failed or is disconnected and needs diagnosis.
Common causes
- Unstable or noisy supply power (a generator, a failing inverter, or a loose neutral).
- A loose power connection at the indoor terminal block.
- A failed zero-crossing detection circuit on the indoor main board.
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.
- 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.
- If the unit is running from a generator or a portable power station, try it on utility power.
- With power off, tighten every screw on the indoor terminal block.
- 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.
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 supply is clean and the wiring is tight, the indoor main board is the culprit and needs replacing.
If yours is a DLC4 / DLF4 series, 2013 to 2015 (Gree-built) unit
Indoor anti-freeze protection.
- TypeProtection
- SystemRefrigerant circuit
- Can I fix it?Usually a homeowner fix
What E2 means on a Arcoaire
The indoor evaporator coil got cold enough to start freezing, so the compressor stopped while the fan runs to thaw it. The most common cause is restricted airflow.
On this platform, E2 is a protection: the system stopped or throttled itself to prevent damage; many clear on their own once conditions return to normal.
Common causes
- Dirty filters or a dirty evaporator coil.
- Cooling with the indoor fan on Low in a cold room, or running cooling when it is cold outside.
- Low refrigerant charge (a starved coil runs cold at the inlet).
- A failed indoor fan motor.
How to fix it yourself
You can almost always clear this yourself with the steps below.
- Pull the front panel and check the filters and the indoor coil. Dirty filters and a matted coil restrict airflow, and airflow problems trigger a surprising number of protection codes.
- Run Fan-only mode until any ice on the coil is gone.
- Raise the fan speed and the set temperature a little; avoid cooling below about 64°F.
- Do not run cooling when it is below roughly 60°F outside unless the unit is rated for it.
- If it recurs with clean filters and normal use, suspect low charge.
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
A technician should check the charge if the coil keeps freezing with clean filters and a healthy fan.
Which Arcoaire units show E2
Arcoaire sells DLCSRA / DLCSRB / DLCLRA outdoor with DLFSHA / DLFSFA indoor (2015 and later) and DLC4 / DLF4 (2013 to 2015) units, and this code carries more than one meaning across them: on the DLC/DLF series, 2015 and later (Midea-built), E2 means zero-crossing signal detection error; on the DLC4 / DLF4 series, 2013 to 2015 (Gree-built), E2 means indoor anti-freeze protection. The model number on the indoor unit's label, and which display you are reading, tell you which applies.
Where Arcoaire shows this code
DLC/DLF series, 2015 and later (Midea-built): The code appears on the indoor unit's LED display in place of the set temperature. Some models also blink the indicator lamps in a pattern that matches the code. E codes are faults in the indoor unit or its communication link, F codes are faults on the outdoor side, and P codes are protections: the outdoor unit has stopped itself to prevent damage. EC is the refrigerant leak check.
DLC4 / DLF4 series, 2013 to 2015 (Gree-built): The code shows on the indoor unit's display in place of the temperature. If the display is off, press the Light button on the remote. Some models also count out the code as indicator blinks. E codes are system protections and faults, F codes are mostly sensor faults, H codes are outdoor and compressor protections, U codes are motor and valve faults, and P codes are power-supply faults.
Other Arcoaire codes
Same part of the system as E2:
E2 on other brands
The same characters do not always mean the same thing. Check the brand on your unit.
- Pioneer E2 Zero-crossing signal detection error / Communication error between the outdoor unit and the indoor units (outdoor display)
- Blueridge E2 Indoor anti-freeze protection / Zero-crossing signal detection error
- Gree E2 Indoor anti-freeze protection
- Zone Air E2 Indoor fan coil (evaporator) temperature sensor fault (open or short circuit)
- Mitsubishi Electric E2 Remote controller control board fault
- Carrier E2 Zero-crossing signal detection error
- Trane E2 Indoor fan coil (evaporator) temperature sensor fault (open or short circuit) / Remote controller control board fault
- Heil E2 Zero-crossing signal detection error / Indoor anti-freeze protection
- ACiQ E2 Zero-crossing signal detection error / Indoor fan coil (evaporator) temperature sensor fault (open or short circuit)
Questions people ask
Why does E2 have more than one meaning on a Arcoaire?
Arcoaire sells units built on more than one control platform, and each platform has its own code table. The model number on the indoor unit's label tells you which series you have: DLC/DLF series, 2015 and later (Midea-built) units read E2 as zero-crossing signal detection error; DLC4 / DLF4 series, 2013 to 2015 (Gree-built) units read E2 as indoor anti-freeze protection.
Can I reset a Arcoaire E2 code myself?
Yes. Turn the system off at the breaker for five minutes, then restart it. If E2 comes back, the fault is real and needs the checks above.
Is it safe to keep running a Arcoaire showing E2?
The unit will usually refuse to run, or run with reduced output, until the fault is cleared. Repeated resets do not fix anything and can mask a problem that is getting worse.
Sources
- ICP DLCSRA Outdoor Unit Single Zone Ductless Service Manual 32808000801 (error code table)
- ICP ductless installation instructions IM-KSAIC04-04 (DLCPRA / DLCSRB / DLCERB / DLCLRA error codes)
- ICP R-410A Ductless Split System Service Manual 421 01 9204 00 (DLC4 / DLF4, 2013)
Updated September 2026. Codes and definitions vary by model year. If your manual disagrees with this page, your manual wins. Send a correction.