Resetting a ductless mini-split heating and cooling system to clear fault codes or reboot its internal computer control board involves a straightforward electrical power cycle. First, turn the mini-split off using its wireless remote control. Second, go to your home's main electrical panel or the dedicated indoor disconnect box and switch off the circuit breaker that supplies power to the unit. Third, leave the system completely unpowered for five to ten minutes to allow internal electrical capacitors to discharge fully, wiping any temporary error memory from the inverter board. Fourth, switch the circuit breaker back on to restore power and turn the unit on with the remote. You can troubleshoot error codes easily. You can verify that the reset was successful when indoor louvers recalibrate smoothly and normal climate control resumes.
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