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Lists common symptoms and initial checks for troubleshooting.
Lists all error codes, their descriptions, and corresponding reference pages.
Troubleshooting steps for errors related to the indoor unit's main control PCB.
Troubleshooting steps for errors related to the outdoor unit's main control PCB.
Guides troubleshooting based on LED indicators on indoor and outdoor units.
Provides diagnostic procedures for wired and wireless remote controllers.
Diagnosis and resolution for issues with the indoor DC fan motor.
Troubleshooting steps for errors related to the indoor fan's control PCB.
Guides on checking and diagnosing thermistor faults in the indoor unit.
Troubleshooting steps for communication errors between indoor units and remote controllers.
Resolves communication errors between indoor and outdoor units.
Addresses compressor overload conditions and their causes.
Troubleshoots compressor overload and high-pressure switch activation.
Details troubleshooting steps for various error codes and system abnormalities.
Essential safety warnings and precautions for service personnel.
Safety guidelines and precautions for end-users of the equipment.
Describes core operational functions like temperature and fan speed control.
Lists and explains system malfunctions and errors detected by sensors and circuits.
Explains system control logic, modes, and specifications.
Explains how to measure thermistor resistance to diagnose faults.
Details the procedure for checking the electronic expansion valve's continuity and operation.
Explains how to use an inverter analyzer to diagnose compressor startup or overcurrent issues.
Details how to test the power module for resistance to diagnose failures.
Provides steps to check the indoor fan motor connector for proper resistance.
Guides on checking power supply waveforms for sine wave and disturbances.
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