![background image](http://html.mh-extra.com/html/daikin/ftxs30hvju/ftxs30hvju_service-manual_2459532086.webp)
SiUS04-924
Troubleshooting
Service Diagnosis
79
4.6
Signal Transmission Error (between Indoor and Outdoor
Unit)
Remote
Controller
Display
U4
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
When the data sent from the outdoor unit cannot be received normally, or when the content of the
data is abnormal.
Supposed
Causes
Faulty outdoor unit PCB / Faulty indoor unit PCB
Indoor unit-outdoor unit signal transmission error due to wiring error / due to disturbed power
supply waveform / due to breaking of wire in the connection wires between the indoor and
outdoor units (wire No. 3)
Short circuit inside the fan motor winding
Troubleshooting
Check No.10
Refer to P.110
Check the voltage of the indoor
unit-outdoor unit connection wires
between No. 1 and No. 3, and
Check No.10
Check power supply waveform.
YES
YES
Replace indoor unit control
PCB .
Locate the cause of the
disturbance of the power supply
waveform, and correct it.
NO
(R8300)
NO
YES
YES
NO
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts damage may occur.
YES
NO
Correct the indoor unit-outdoor
unit connection wires.
Diagnose the outdoor unit.
Replace the connection wires
between the indoor and
outdoor units.
Replace fan motor and outdoor
unit PCB .
Does fan rotate
smoothly?
Is LED A flashing?
Is the voltage 0 V?
Is there any
disturbance?
Is there any wiring error?
Check the indoor unit-outdoor unit
Summary of Contents for FTXS30HVJU
Page 1: ...SiUS04 924 Applied Models Inverter Pair Heat Pump Inverter Pair Wall Mounted Type H Series ...
Page 8: ...SiUS04 924 List of Functions 1 Part 1 List of Functions 1 List of Functions 2 ...
Page 10: ...SiUS04 924 Specifications 3 Part 2 Specifications 1 Specifications 4 ...
Page 50: ...Control Specification SiUS04 924 Function and Control 43 ...
Page 53: ...Instruction SiUS04 924 46 Operation Manual 2 Instruction 2 1 Remote Controller ...
Page 54: ...SiUS04 924 Instruction Operation Manual 47 operation ...
Page 55: ...Instruction SiUS04 924 48 Operation Manual 2 2 AUTO DRY COOL HEAT FAN Operation ...
Page 56: ...SiUS04 924 Instruction Operation Manual 49 ...
Page 58: ...SiUS04 924 Instruction Operation Manual 51 fins fins fins fins angles Inside ...
Page 60: ...SiUS04 924 Instruction Operation Manual 53 2 5 INTELLIGENT EYE Operation fins above ...
Page 61: ...Instruction SiUS04 924 54 Operation Manual ...
Page 62: ...SiUS04 924 Instruction Operation Manual 55 2 6 POWERFUL Operation ...
Page 63: ...Instruction SiUS04 924 56 Operation Manual 2 7 OUTDOOR UNIT QUIET Operation ...
Page 64: ...SiUS04 924 Instruction Operation Manual 57 2 8 ECONO Operation ...
Page 65: ...Instruction SiUS04 924 58 Operation Manual 2 9 TIMER Operation ...
Page 66: ...SiUS04 924 Instruction Operation Manual 59 ...
Page 69: ...Instruction SiUS04 924 62 Operation Manual ...
Page 70: ...SiUS04 924 Instruction Operation Manual 63 ...
Page 71: ...Instruction SiUS04 924 64 Operation Manual ...
Page 72: ...SiUS04 924 Instruction Operation Manual 65 3P228444 2B ...
Page 193: ...SiUS04 924 187 Appendix Part 9 Appendix 1 Piping Diagrams 188 2 Wiring Diagrams 189 ...