Mismatching Of Indoor Unit And Outdoor Unit - Daikin CTXG09QVJUW Service Manual

SiUS121632EA

6.11 Mismatching of Indoor Unit and Outdoor Unit

UA
Error Code
Error Decision
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Improper combination of indoor and outdoor units
Defective indoor unit PCB
Indoor-outdoor unit transmission wiring error
Defective optional unit(s) wirings
Improper power supply wiring of indoor unit
Improper wiring of connecting wires between indoor/outdoor units
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the combination
of indoor/outdoor
units correct?
YES
Continuously
ON or OFF
Do the service
monitors of all the
indoor units blink?
Blink
Turn off the power supply.
Then, turn on the power
supply to restart the system.
Does the system conduct
normal operation?
YES
NO
Are the wirings
between indoor unit and
outdoor unit correctly
connected?
YES
Is the optional
units power supply
connected from the
indoor unit terminal
block No.1 and
No.2?
YES
Is the voltage
between No.1 and
No.2 on the indoor
unit terminal block
208 - 230
VAC?
YES
Are the wirings
NO
between indoor unit and
outdoor unit correctly
connected?
YES
Troubleshooting for FFQ Series
Connect the indoor/outdoor
units correctly.
NO
Connect the wirings correctly.
NO
Connect the wirings correctly.
NO
Could be incorrect wiring.
Check again.
Check the power supply system
inside the indoor unit.
NO
Connect the wirings correctly.
Replace the indoor unit PCB
(control PCB).
Normal
(R24591)
159