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Troubleshooting for Outdoor Unit
SiEN18-622
376
Troubleshooting
7.15 Malfunction of High Pressure Sensor
Remote Control
Display
JA
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected from the pressure detected by the high pressure sensor.
Malfunction
Decision
Conditions
When the high pressure sensor is short circuit or open circuit.
Supposed
Causes
Defect of high pressure sensor
Connection of low 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
06)
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 high
pre
ssu
re
s
en
s
or i
s
connected to X17A of
o
u
tdoor
u
nit PC
b
o
a
rd (A1P).
The
rel
a
tion
s
hip
b
etween the
*
1
VH
a
nd high pre
ssu
re
i
s
norm
a
l (
s
ee
*
2) when
volt
a
ge i
s
me
au
red
b
etween X17A pin
s
(1)
a
nd (
3
) of o
u
tdoor
u
nit PC
b
o
a
rd
(A1P)
(
s
ee
*
1).
Connect the high pre
ssu
re
s
en
s
or
a
nd t
u
rn on
a
g
a
in.
Repl
a
ce o
u
tdoor
u
nit PC
b
o
a
rd (A1P).
Repl
a
ce the high pre
ssu
re
s
en
s
or.
O
u
tdoor
u
nit PC
b
o
a
rd A1P
*
2 Me
asu
re DC volt
a
ge here.
+5V
X17A
Red
Bl
a
ck
White
GND
Microcomp
u
ter
A/D inp
u
t
High pre
ssu
re
s
en
s
or
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 ...