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Troubleshooting for Outdoor Unit
SiEN18-622
388
Troubleshooting
Troubleshooting
∗
2: Voltage measurement point
∗
1: Refer to “Thermistor Resistance / Temperature Characteristics” table on P407.
∗
2: Refer to “Pressure Sensor, Pressure / Voltage Characteristics” table on P409.
(V2
8
19)
YE
S
YE
S
NO
NO
YE
S
YE
S
NO
NO
Cooling
NO
NO
YE
S
YE
S
Caution
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.
O
u
t of g
as
, clo
s
ing of
s
top
v
a
lve or refriger
a
nt
s
y
s
tem
i
s
clogged. Re
qu
ire
s
check
of refriger
a
nt
s
y
s
tem.
Repl
a
ce m
a
in o
u
tdoor
u
nit
PC
b
o
a
rd (A1P).
Repl
a
ce low pre
ssu
re
s
en
s
or.
O
u
t of g
as
or refriger
a
nt
s
y
s
tem i
s
clogged. Re
qu
ire
s
check of refriger
a
nt
s
y
s
tem.
Repl
a
ce the thermi
s
tor.
Repl
a
ce the low pre
ssu
re
s
en
s
or.
Repl
a
ce the o
u
tdoor
u
nit
PC
b
o
a
rd (A1P).
The
su
ction
pipe1 temp. min
us
low
pre
ssu
re
sa
t
u
r
a
tion
temp. i
s
20 °C or
higher.
I
s
the
low pre
ssu
re
s
en
s
or
correct?
Re
s
i
s
t
a
nce
i
s
norm
a
l when
me
asu
red with the
thermi
s
tor (R
3
T) for
su
ction pipe1
di
s
connected from the
o
u
tdoor
u
nit
PC
b
o
a
rd.
*
1
Low pre
ssu
re i
s
0.25 MP
a
or le
ss
.
The
volt
a
ge of
X1
8
A pin
s
(2)
a
nd (
3
) on m
a
in
o
u
tdoor
u
nit PC
b
o
a
rd
(A1P) i
s
1.0 VDC or
le
ss
. (Low pre
ssu
re
s
en
s
or o
u
tp
u
t
volt
a
ge)
*
2
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 ...