Unspecified Voltage (Between Indoor Unit And Outdoor Unit) - Daikin FTXM-K Series Service Manual

Troubleshooting
4.9 Unspecified Voltage (Between Indoor Unit and Outdoor
Unit)
UA
Error Code
Method of Error The supply power is detected for its requirements (pair type is different from multi type) by the
Detection indoor / outdoor transmission signal.
Error Decision The pair type and multi type are interconnected.
Conditions
Supposed
Causes
Troubleshooting
Check the
indoor
75
Wrong models interconnected
Wrong wiring of connecting wires
Wrong indoor unit PCB or outdoor unit PCB mounted
Defective indoor unit PCB
Defective outdoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
combination of the
and outdoor unit.
OK?
YES
Are the
connecting wires connected
properly?
YES
NO
NO
SiBE041434E
Match the compatible models.
Correct the connection.
Check the code numbers
(2P012345, for example) of the
indoor and outdoor unit PCB
with the Parts List.
If not matched, change for the
correct PCB.
(R20435)
Service Diagnosis