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Troubleshooting for FTX, FVXS Series
SiUS091601EA
137
Part 6 Service Diagnosis
5.7 Unspecified Voltage (Between Indoor Unit and Outdoor
Unit)
Error Code
UA
Method of Error
Detection
The supply power is detected for its requirements (pair type is different from multi type) by the
indoor/outdoor transmission signal.
Error Decision
Conditions
The pair type and multi type are interconnected.
Supposed
Causes
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
Troubleshooting
(R20435)
Caution
N
O
YES
YES
N
O
Match the compati
b
le models.
OK?
Correct the connection.
Check the code n
u
m
b
ers
(2P012345, for example) of the
indoor and o
u
tdoor
u
nit PCB
w
ith the Parts List.
If not matched, change for the
correct PCB.
Are the
connecting
w
ires connected
properly?
Check the
com
b
ination of the
indoor
and o
u
tdoor
u
nit.
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
Summary of Contents for FDMQ12RVJU
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 ...