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SiEN18-622
Troubleshooting for BP Unit
Troubleshooting
355
6.4
Transmission Error between Indoor Unit and BP Unit
Outdoor Unit
Indication
U4
Method of
Malfunction
Detection
The data received from the BP unit in indoor unit-BP unit signal transmission is checked
whether it is normal.
Malfunction
Decision
Conditions
When the data sent from the BP unit cannot be received normally, or when the content of the
data is abnormal.
Supposed
Causes
Faulty BP unit PCB.
Faulty indoor unit PCB.
Indoor unit-BP unit signal transmission error due to wiring error.
Indoor unit-BP unit signal transmission error due to disturbed power supply waveform.
Indoor unit-BP unit signal transmission error due to breaking of wire in the connection wires
between the indoor and BP units (wire No. 2).
Summary of Contents for FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...