How can I troubleshoot an E6 error on my air conditioner before calling a technician?

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Grade: Education Subject: Support
How can I troubleshoot an E6 error on my air conditioner before calling a technician?
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First, check the power supply. Then, inspect the wiring connections between the indoor and outdoor units for any loose or damaged wires. Reset the unit by turning it off at the breaker for 15-30 minutes. If the error persists, a professional diagnosis is recommended.