Mismatching Of Indoor Unit And Outdoor Unit - Daikin 4MXL-T Series Service Manual

SiUS121827E
5.7

Mismatching of 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
 Wrong models interconnected
Causes  Wrong wiring of connecting wires
 Wrong indoor unit PCB or outdoor unit PCB mounted
 Defective indoor unit PCB
 Defective outdoor unit PCB
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the combination of the
indoor and outdoor unit.
OK?
YES
Are the
connecting wires
connected properly?
YES
NO
NO
Troubleshooting for RA Indoor Unit
Match the compatible models.
Correct the connection.
Check the part numbers of the
indoor and outdoor unit PCB
with the Parts List.
If not matched, change for the
correct PCB.
(R23001)
177