Checking code 1102: Serial transmission abnormality. Discharge temperature abnormality (Outdoor unit). Meaning, detecting method When 140˚C or more discharge temperature is detected during operations (the first time), outdoor unit stops once, mode is changed to restart mode after 3 minutes, then the outdoor unit restarts. When 140˚C or more temp. is detected again (the second … Read more
Checking code 0403: Serial transmission abnormality. Meaning, detecting method If serial transmission cannot be established between the MAIN and INV boards. Cause Wiring is defective. Switches are set wrong on the INV board. A fuse (F01) on the INV board is defective. The circuit board is defective.
Description: DC_link voltage sensor error. Checklist: Is the input voltage of outdoor terminal block is normal? Is the reactor wire connected? Is the PFC resistor(“A”) value is normal? (Outdoor PBA) Troubleshooting Procedure
Description: Outdoor Unit PCB Abnormality. Method of Malfunction Detection: The system checks if the microprocessor is working in order. The system checks if the zero-cross signal comes in properly. Malfunction Decision Conditions: The microprocessor program runs out of control. The zero-cross signal is not detected. Supposed Causes: Defective outdoor unit PCB Broken harness between PCBs … Read more
Description: Unspecified Voltage (between Indoor Unit and Outdoor Unit). Method of Malfunction Detection: The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal. Malfunction Decision Conditions: The pair type and multi type are interconnected. Supposed Causes: Wrong models interconnected Wrong wiring of connecting wires … Read more