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General| Brand | Carrier |
|---|---|
| Model | 42QHC012ES 38QHC012DS |
| Category | Air Conditioner |
| Language | English |
Instructions to prevent injury to users and property damage. Emphasizes reading the manual before service.
Covers critical warnings related to installation, electrical safety, product usage, and environmental considerations.
Emphasizes caution regarding residual electricity in capacitors and proper discharge methods before component checks.
Diagnoses EEPROM parameter errors, suggesting checks for installation mistakes or faulty PCBs.
Addresses communication errors between indoor and outdoor units, involving wiring and PCB checks.
Troubleshoots issues with indoor fan speed control, including wiring, fan assembly, or PCB faults.
Diagnoses refrigerant leakage based on evaporator coil temperature, suggesting sensor or system checks.
Addresses open or short circuits in temperature sensors, guiding checks on connections, sensor resistance, and PCBs.
Troubleshoots IPM malfunction or over-current protection, involving wiring, IPM, fan, and compressor checks.
Addresses abnormal voltage detection, guiding checks on power supply, wiring, IPM, and reactor.
Diagnoses high temperature protection of the compressor top, involving airflow, overload protector, and refrigerant system checks.
Troubleshoots abnormal inverter compressor drive signals, including wiring, IPM, fan, and compressor checks.
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