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SiUS091601EA
Troubleshooting for FDMQ Series
Part 6 Service Diagnosis
152
6.12 Mismatching of Indoor Unit and Outdoor Unit
Error Code
UA
Error Decision
Conditions
Improper combination of indoor and outdoor units
Supposed
Causes
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
Troubleshooting
Connect the wirings correctly.
Replace the indoor unit PCB
(control PCB).
Normal
Connect the wirings correctly.
Check the power supply system
inside the indoor unit.
Could be incorrect wiring.
Check again.
YES
YES
NO
NO
Connect the indoor/outdoor
units correctly.
YES
YES
YES
YES
NO
NO
NO
Blink
(R24591)
Is the combination
of indoor/outdoor
units correct?
Do(es) the indoor
unit service monitor(s)
blink?
Are the wirings
between indoor unit and
outdoor unit correctly
connected?
Connect the wirings correctly.
NO
Is the optional
units power supply
connected from the
indoor unit terminal
block No.1 and
No.2?
Does the system conduct
normal operation?
Are the wirings
between indoor unit and
outdoor unit correctly
connected?
Turn off the power supply.
Then, turn on the power
supply to restart the system.
Continuously
ON or OFF
Is the voltage
between No.1 and
No.2 on the indoor
unit terminal block
208 - 230
VAC?
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Summary of Contents for FTX-N Series
Page 18: ...SiUS091601EA 13 Part 2 Specifications 1 Specifications 14 Part 2 Specifications...
Page 198: ...Check SiUS091601EA 193 Part 6 Service Diagnosis 18 24 class R24538 1 2 3 4 Multimeter...
Page 201: ...SiUS091601EA Check Part 6 Service Diagnosis 196 18 24 class R24539 DC DC W V U...
Page 229: ...SiUS091601EA Piping Diagrams Part 8 Appendix 224 RXL15QMVJU RXL18UMVJU 3D100007 3D123368...
Page 230: ...Piping Diagrams SiUS091601EA 225 Part 8 Appendix RXL24UMVJU 3D107985A...