Troubleshooting for FTX, FVXS Series SiUS091601EA
137 Part 6 Service Diagnosis
5.7 Unspecified Voltage (Between Indoor Unit and Outdoor
Unit)
Error Code UA
Method of Error
Detection
The supply power is detected for its requirements (pair type is different from multi type) by the
indoor/outdoor transmission signal.
Error Decision
Conditions
The pair type and multi type are interconnected.
Supposed
Causes
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
Troubleshooting
(R20435)
Caution
NO
YES
YES
NO
Match the compatible models.
OK?
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.
Are the
connecting wires connected
properly?
Check the combination of the
indoor and outdoor unit.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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