Resetting a ductless mini-split air conditioning system to clear persistent error codes, reboot frozen control boards, or restore normal operating behavior can be accomplished through a simple electrical power cycle. First, turn off the mini-split system using its handheld remote control, and then switch off the dedicated indoor electrical disconnect box or trip the circuit breaker in your main electrical panel that supplies power to the unit. Second, leave all electrical power completely disconnected for approximately five to ten minutes to allow internal capacitors to discharge fully and clear system memory. Third, restore power at the circuit breaker panel and turn the system back on via the remote. You can troubleshoot persistent error flashes easily. You can verify that the reset was successful when the indoor unit louvers recalibrate smoothly and normal cooling or heating resumes.
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