SiUS04-924_A Troubleshooting
80 Service Diagnosis
4.7 Unspecified Voltage (between Indoor Unit and Outdoor
Unit)
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 wiring of connecting wires
Wrong indoor unit PCB or outdoor unit PCB mounted
Defective indoor unit PCB
Defective outdoor unit PCB
Troubleshooting
(R11707)
Caution
NO
YES
YES
YES
NO
NO
Check the code numbers
(2P01234, for example) of the
indoor and outdoor unit PCB with
the Parts List.
Match the compatible models.
Change for the correct PCB.
Replace the indoor unit PCB
(or the outdoor unit PCB).
Correct the connection.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check the combination of the
indoor and outdoor unit.
OK?
Are the
connection wires
connected
property?
Matched compatibly?
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