Signal Transmission Error (Between Indoor And Outdoor Units) - Daikin FTK25JV1NB Manual

Si-86.book Page 66 Friday, June 23, 2000 10:26 AM
Troubleshooting
5.10 Signal Transmission Error (Between Indoor and Outdoor Units) (U4)
U U U U 4 4 4 4
Remote Controller
Display
Indoor unit LED
Display
Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether
Malfunction it is normal.
Detection
Malfunction
When the data sent from the outdoor unit cannot be received normally, or when the content of the data is
Decision
abnormal.
Conditions
Supposed Causes
Troubleshooting
Check No.13
Refer to P.82
66
Faulty outdoor unit PCB.
Faulty indoor unit PCB.
Indoor unit-outdoor unit signal transmission error due to wiring error.
Indoor unit-outdoor unit signal transmission error due to disturbed power supply waveform.
Indoor unit-outdoor unit signal transmission error due to breaking of wire in the connection wires
between the indoor and outdoor units (wire No. 2).
Check the indoor unit-outdoor unit
connection wires.
YES
Is there any wiring error?
NO
Check the outdoor unit's LED A.
NO
Is LED A flashing?
YES
Check the voltage of the indoor
unit-outdoor unit connection wires
between No. 1 and No. 2, and
between No 2 and No. 3.
YES
Is the voltage 0 V?
NO
Check No. 13
Check power supply waveform.
NO
Is there any disturbance?
YES
SIE-86
Correct the indoor unit-outdoor
unit connection wires.
Diagnose the outdoor unit.
Replace the connection wires
between the indoor and outdoor
units.
Replace indoor unit PCBs (1).
Locate the cause of the
disturbance of the power supply
waveform, and correct it.
(MF007)
Service Diagnosis