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Troubleshooting for RA Indoor Unit
SiEN18-622
322
Troubleshooting
4. Troubleshooting for RA Indoor Unit
4.1
Indoor Unit PCB Abnormality
Remote Control
Display
A1
Method of
Malfunction
Detection
Evaluation of zero-cross detection of power supply by indoor unit.
Malfunction
Decision
Conditions
When there is no zero-cross detection in approximately 10 continuous seconds.
Supposed
Causes
Faulty indoor unit PCB
Faulty connector connection
Troubleshooting
Note:
Connector Nos. vary depending on models.
Control connector
(R1400)
Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred.
Connector connection check
(note).
Is it normal?
Correct connections.Replace
Replace PCBs.
YES
NO
Caution
Model Type
Connector No.
Wall Mounted Type
Terminal strip~Control PCB
Duct Connected Type
Terminal strip~Control PCB
Floor / Ceiling Suspended Dual Type S37
Floor Standing Type
Control PCB : S7, S201, S203
Power Supply PCB : S8, S202, S204
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 ...