Mismatching Of Indoor Unit And Outdoor Unit - Daikin 2MXS-W Series Service Manual

Troubleshooting for Duct Concealed/Ceiling Cassette Type

6.12 Mismatching of Indoor Unit and Outdoor Unit

UA
Error Code
Error Decision Improper combination of indoor and outdoor units
Conditions
Supposed
 Defective indoor unit PCB
Causes  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
Troubleshooting
184
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the combination NO
of indoor/outdoor
units correct?
YES
Continuously
ON or OFF
Do(es) the indoor
unit service monitor(s)
blink?
Blink
Turn off the power supply.
Then, turn on the power
supply to restart the system.
NO
Does the system conduct
normal operation?
YES
Are the wirings
NO
between indoor unit and
outdoor unit correctly
connected?
YES
Is the optional
units power supply
NO
connected from the
indoor unit terminal
block No.1 and
No.2?
YES
Is the voltage
between No.1 and
NO
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
SiUS122226E
Connect the indoor/outdoor
units correctly.
Connect the wirings correctly.
Connect the wirings correctly.
Could be incorrect wiring.
Check again.
Check the power supply system
inside the indoor unit.
Connect the wirings correctly.
Replace the indoor unit PCB
(control PCB).
Normal
(R24591)
Part 6 Service Diagnosis