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Troubleshooting
SiMT041311E
177
Service Diagnosis
2.38 Unspecified Voltage (Between Indoor Unit and Outdoor
Unit)
Error Code
UA
Method of Error
Detection
Check the incompatible power supply between indoor unit and outdoor unit by using signal
transmission.
Error Decision
Condition
In case that the indoor unit model is not compatible with outdoor unit model.
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
(R19506)
Caution
NO
YES
YES
NO
Match the compatible models.
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.
OK?
Correct the connection.
Are the
connecting wires connected
property?
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.