Unspecified Voltage (Between Indoor Unit And Outdoor Unit) - Daikin FTXZ25NV1B Service Manual

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