Check
SiUS12-928_B
195
Service Diagnosis
7.6
Four Way Valve Performance Check
Check No.13
7.7
Inverter Unit Refrigerant System Check
Check No.14
(R11717)
(R11725)
N
O
YES
YES
N
O
(Fig. 1)
V
oltage at S
8
0
20
8
/230
V
AC
O
N
Compressor
Time
T
u
rn off the po
w
er and t
u
rn it on
again.
Disconnect the connector for the
fo
u
r
w
ay
v
al
v
e coil and check the
contin
u
ity.
Start heating operation.
*
Fo
u
r-
w
ay
v
al
v
e coil
Cooling / dry :
N
o contin
u
ity
Heating : Contin
u
ity
Replace the o
u
tdoor
u
nit
PCB.
Replace the fo
u
r-
w
ay
v
al
v
e
coil.
Replace the fo
u
r-
w
ay
v
al
v
e.
Fo
u
r-
w
ay
v
al
v
e
coil resistance at 1000
~
2000
W
?
S
8
0
v
oltage at
20
8
/230
V
AC
w
ith
compressor on? (Fig.
1)
Refrigerant system check
Is the discharge pipe
thermistor disconnected from
the holder?
Check for refrigerant leakage.
See the section on refrigerant
shortage detection.
(R15
8
33)
YES
N
O
Reconnect the thermistor.
Replace the refrigerant.
