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
Description: Signal Transmission Error (between Indoor Unit and Outdoor Unit)Signal Transmission Error on Outdoor Unit PCB (24/30/36 Class Only). Method of Malfunction Detection: Communication error between microcomputer mounted on the main microcomputer and PM1. Malfunction Decision Conditions: The abnormality is determined when the data sent from the PM1 can not be received for 9 seconds. … Read more
Description: Signal Transmission Error (between Indoor Unit and Outdoor Unit) Method of Malfunction Detection: The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Decision Conditions: The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal. … Read more