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Troubleshooting for BP Unit
SiEN18-622
352
Troubleshooting
6. Troubleshooting for BP Unit
6.1
Malfunction of Electronic Expansion Valve
Remote Control
Display
A9
Method of
Malfunction
Detection
Detection by checking continuity and lack of connector.
Malfunction
Decision
Conditions
Malfunction is determined by no common voltage applied when turning the power supply on.
Supposed
Causes
Faulty harness of electronic expansion valve
Incorrect connectors connection of electronic expansion valve
Troubleshooting
(Q0
3
90)
NO
YE
S
NO
Caution
YE
S
YE
S
NO
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.
T
u
rn the power
su
pply off once
a
nd then
ba
ck on.
I
s
m
a
lf
u
nction
re-gener
a
ted?
I
s
the
electronic
exp
a
n
s
ion v
a
lve coil
connected to PCB
of the f
au
lty
p
a
rt?
I
s
the
re
s
i
s
t
a
nce of the
electronic
exp
a
n
s
ion v
a
lve coil
norm
a
l?
(46±4
Ω
/20°C)
Keep
us
ing
as
it i
s
. (Co
u
ld
b
e o
u
t
s
ide error other th
a
n
m
a
lf
u
nction.)
Correct the connection.
Electronic exp
a
n
s
ion
v
a
lve coil f
au
lty
Repl
a
ce BP
u
nit PCB of
the
a
pplic
ab
le p
a
rt.
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 ...