During Twin Operation - Panasonic CU-J24DBE5 Service Manual

12.2. During twin operation

System example
1. The main power is turned on while the transmission wires between the indoor units are not connected.
(open circuit at A or B)
Symptom
Remote control unit: "check" flashes
Error code: F30-01 (connected indoor capacity error)
Indoor unit No. 1: LED1 on P.C.B flashes
Indoor unit No. 2: no power supply
Outdoor unit: LED6, 7 on P.C.B flashes (connected indoor capacity error)
2. The main power is turned on while the transmission wires between the indoor units are not connected.
(open circuit at section C)
Symptom
Remote control unit: "check" flashes
Error code: F30-01 (connected indoor capacity error)
Indoor unit No. 1: LED1 on P.C.B flashes
Indoor unit No. 2: no power supply
Outdoor unit: LED5, 6 on P.C.B flashes (connected indoor capacity error)
3. The main power is turned on and the connection wire is all ok.
If operation starts in this condition, combination of the J50DBE8 outdoor unit and F24DB4E5 indoor unit will result in abnormal
operation.
Symptom
Remote control unit: "check" flashes
Error code: F30-01 (connected indoor capacity error)
Indoor unit: LED1 on P.C.B flashes
Outdoor unit: LED6, 7 on P.C.B flashes
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