How to Reset a Daikin Mini-Split

Quick Answer

To reset a Daikin mini-split: turn off the unit from the remote, then flip the dedicated circuit breaker off for 30 seconds and back on. Daikin mini-splits do not have a wall outlet to unplug - they run on a dedicated 240V circuit. Always note any error code on the indoor unit LED before resetting, as the code clears after power is restored.

Most of the time when I get a call about a Daikin that won't respond, it's a simple communication glitch that a breaker cycle fixes in five minutes. But here's what I see homeowners do wrong constantly: they reset the unit without writing down the error code first. Once that breaker flips back on, that code is gone. If the problem comes back, you're flying blind.

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How to Reset Your Daikin Minisplit

OK so here's the deal with Daikin resets. These aren't window AC units you just unplug. They're hardwired to a dedicated 240V circuit, so the breaker is your reset button. I've probably done a hundred of these service calls and honestly, about 70% of the time a simple breaker cycle is all it takes. The other 30% means there's an actual error code pointing at something that actually needs fixing.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Error code needs clearing after repair40%

System frozen or unresponsive24%

After power outage recovery14%

Thermostat lost communication12%

Control board needs reboot10%

Symptoms You May Notice

The indoor unit display is showing a flashing error code but the system won't respond to anything you press on the remote.
Unit completely ignores the remote, like you're pressing buttons on a dead TV.
Indoor fan runs and you can hear it spinning, but zero actual cooling or heating is happening and the air coming out is just room temperature.
After a power outage, the unit just sits there with indicator lights on but won't start no matter what you do.
The Daikin One+ thermostat screen shows 'Communication Error' or goes completely blank.

Tools Required for Diagnosis

Remote control (with fresh AA or AAA batteries installed)Phone or camera to photograph error codes before clearingFlashlight for reading breaker panel labels

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Did the reset not work?

If the problem comes back after following these steps, a component has permanently failed and needs replacement. Check the specific error code your minisplit is showing:

HUB Error →TROUBLESHOOT Error →WONT-TURN-ON Error →

Frequently Asked Questions

How long should I leave the breaker off for a Daikin reset?

At least 30 seconds, but I tell people to wait a full minute just to be safe. The inverter board has big capacitors that hold a charge after power cuts. Flip it back too fast and the board thinks it never actually lost power, so it doesn't really reboot. And then after the power comes back on there's also a built-in 3-minute compressor protection delay. That's completely normal, it's a feature not a bug. Don't panic when you flip the breaker and nothing happens right away. Give it 3 full minutes before you decide the reset didn't work.

Will resetting erase my Daikin settings?

A regular breaker reset won't erase anything. Your temperature preferences, fan speed settings, all of that stays in non-volatile memory. It's basically like restarting your laptop, the files are still there when it comes back up. But a full factory reset on the Daikin One+ thermostat is a different story. That WILL wipe your WiFi credentials, your heating and cooling schedules, and any custom settings your installer programmed. The indoor unit itself keeps its basic config. So if you're about to do a factory reset, take photos of your current schedule settings first so you can put them back.

My Daikin needs resetting every few days. Is that normal?

No, definitely not normal. If you're hiking to the breaker panel every few days, the unit is throwing the same fault over and over and you're just silencing it without fixing anything. I see this most often when refrigerant is low and the system keeps hitting a high-pressure trip, or when a thermistor is reading way out of range. Doing repeated resets can mask a problem that's slowly killing your compressor. Pull the actual error code from the display before your next reset, then look up that specific code. That code is the unit telling you exactly what's wrong.

Can I reset my Daikin mini-split with just the remote, without touching the breaker?

You can try it first. Holding the Cancel button on the remote for 5 seconds does a soft reset that clears the displayed error code. But it doesn't actually power cycle the outdoor unit, so it won't fix a real communication issue between the two boards. Think of it like restarting one computer on a network without rebooting the router, sometimes it works and sometimes it doesn't. For anything more than a minor display glitch, you really need the breaker cycle to reboot the whole system. The soft reset is worth trying first since it's faster and you don't have to go to the panel, just don't be surprised if it doesn't stick.

What if the same error code comes back immediately after I reset it?

That means it's not a glitch, it's an actual fault the unit detected on startup. If the same code pops back up within a few minutes of a reset, don't just reset it again. Write down that code and look it up. Common ones I see come back fast are E7 for the outdoor fan motor, U4 for a communication fault between the indoor and outdoor boards, and anything in the L series pointing at refrigerant pressure problems. At that point you need a tech with a manifold gauge set or a multimeter to actually diagnose what's failing. Resetting it again is just gonna give you the same code.

Related Daikin Minisplit Error Codes

Code: HUBDaikin Mini-Split Error Codes: Complete Guide Code: TROUBLESHOOTDaikin Mini-Split Troubleshooting Guide Code: WONT-TURN-ONDaikin Mini-Split Won't Turn On

Models Known to Experience RESET Errors

This repair applies to most Daikin minisplits with this error code. Common model numbers include:

FTXS09LVJU, FTXS12LVJU, FTXS15LVJU, FTXM09QVJU, FTXM12QVJU, FTXM15QVJU, FTXM18QVJU, FTXM24QVJU

Written by

Raj Patel

HVAC & Water Systems Specialist · 15 years experience

Last verified for technical accuracy on March 15, 2026