Daikin FTXS30HVJU - Unspecified Voltage (between Indoor and Outdoor Units)

Troubleshooting SiUS04-924
80 Service Diagnosis
4.7 Unspecified Voltage (between Indoor and Outdoor Units)
Remote
Controller
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
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts damage may occur.
Check the indoor and outdoor unit
model numbers.
(R8308)
YES
NO
NO
YES
Check the code numbers
(2P01234, for example) of the
indoor and outdoor unit PCB with
Match the compatible
models.
Replace the indoor unit
PCB (or the outdoor unit
PCB).
Change for the specified
PCBs.
Matched
compatibly?
Indoor unit and
outdoor unit matched?