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SiSG121917E
Troubleshooting for Wall Mounted and LSP Duct Type Indoor Unit
Part 6 Service Diagnosis
126
5.6 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
(R232
8
9)
Caution
N
O
YES
YES
N
O
Match the compati
b
le models.
OK?
Correct the connection.
Check the part n
u
m
b
ers 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.