Daikin FTKS20D3VMW, Service Manual

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Troubleshooting SiENBE12-713
246 Service Diagnosis
5.9 Unspecified Voltage (between Indoor and Outdoor Units)
Remote Control
Display
UA
Method of
Malfunction
Detection
The supply power is detected for its requirements (different from pair type and multi type) by the
indoor / outdoor transmission signal.
Malfunction
Decision
Conditions The pair type and multi type are interconnected.
Supposed
Causes
"
Wrong models interconnected
"
Wrong indoor unit PCB mounted
"
Indoor unit PCB defective
"
Wrong outdoor unit PCB mounted or defective
Troubleshooting
Check the indoor and outdoor unit
model numbers.
Match the compatible
models.
Change for the specified
PCB (1) or (2).
Replace the indoor unit
PCB (1) (or the outdoor unit
PCB).
(Q0347)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Indoor unit and outdoor unit
matched?
NO
YES
YES
Matched compatibly?
NO
Check the code numbers
(2P01234, for example) of the
indoor and outdoor unit PCB with
the Parts List.