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SiEN18-622
Troubleshooting for Outdoor Unit
Troubleshooting
377
7.16 Malfunction of Low Pressure Sensor
Remote Control
Display
JC
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected from pressure detected by low pressure sensor.
Malfunction
Decision
Conditions
When the low pressure sensor is short circuit or open circuit.
Supposed
Causes
Defect of low pressure sensor
Connection of high pressure sensor with wrong connection.
Defect of outdoor unit PCB.
Troubleshooting
∗
1: Voltage measurement point
∗
2: Refer to “Pressure Sensor”, pressure/voltage characteristics table on P409.
(V2
8
0
8
)
Caution
NO
NO
YE
S
YE
S
Be
su
re to t
u
rn off power
s
witch
b
efore connect or di
s
connect connector,
or p
a
rt
s
d
a
m
a
ge m
a
y
b
e occ
u
rred.
The low
pre
ssu
re
s
en
s
or i
s
connected to X1
8
A
(
b
l
u
e)of o
u
tdoor
u
nit PC
b
o
a
rd (A1P).
The
rel
a
tion
s
hip
b
etween the
*
1
VL
a
nd low pre
ssu
re i
s
norm
a
l (
s
ee
*
2) when volt
a
ge
i
s
me
asu
red
b
etween X1
8
A
pin
s
(2)
a
nd (
3
) of o
u
tdoor
u
nit PC
b
o
a
rd
(A1P)
(
s
ee
*
1)
Connect low pre
ssu
re
s
en
s
or property
a
nd
re
s
t
a
rt
s
y
s
tem.
Repl
a
ce o
u
tdoor
u
nit PC
b
o
a
rd (A1P).
Repl
a
ce the low pre
ssu
re
s
en
s
or.
O
u
tdoor
u
nit PC
b
o
a
rd A1P
+5V
Microcomp
u
ter
A/D inp
u
t
*
2 Me
asu
re volt
a
ge here.
X1
8
A
Red
Bl
a
ck
White
Lo
w pre
ssu
re
s
en
s
or
(V2
8
09)
GND
Summary of Contents for FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...