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Troubleshooting for Outdoor Unit
SiUS12-928_B
171
Service Diagnosis
Troubleshooting
Check No.01
Refer to P.191
Check No.13
Refer to P.195
Check No.14
Refer to P.195
N
G
OK
N
O
OK
N
G
OK
YES
N
G
Correct the fo
u
r-
w
ay
v
al
v
e
coil.
Reconnect the harness.
YES
YES
YES
N
O
N
O
Replace the fo
u
r-
w
ay
v
al
v
e
coil.
N
O
Replace the o
u
tdoor
u
nit
PCB.
Replace a defecti
v
e
thermistor(s).
Refer to the refrigerant line
check proced
u
re.
Replace the fo
u
r-
w
ay
v
al
v
e.
(defecti
v
e or d
u
st-clogged)
Reconnect the thermistor(s)
in position.
Caution
(R15
8
24)
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.
*
W
ater mixed
*
Stop
v
al
v
e
Fo
u
r
w
ay-
v
al
v
e
coil disconnected (loose)?
Harness o
u
t of
connector?
Any thermistor
disconnected?
Check No. 01
Check the thermistors.
Check No. 14
Check the refrigerant line.
Check No.
13
Check the fo
u
r-
w
ay
v
al
v
e
s
w
itching o
u
tp
u
t.
Resistance
b
et
w
een harnesses
a
b
o
u
t 1000
~
2000
W
?
Check the contin
u
ity of the fo
u
r-
w
ay
v
al
v
e coil and harness.
Disconnect the harness from the
connector.