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Overview of system components and fundamental heating operation procedures.
Detailed analysis of power circuits, sensors, motors, and compressor for troubleshooting.
Examination of indoor unit safety thermostats, electrical heaters, and DHW thermistors.
Steps for safe power discharge, self-diagnosis, and checking electrical parts like circuits, sensors, and motors.
Diagnosing issues using alarm codes related to transmission, thermistors, and controller communication.
Troubleshooting specific protection codes (P102-P116) related to compressor, fan, and power issues.
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