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Troubleshooting for Outdoor Unit
SiEN18-622
394
Troubleshooting
7.30 Malfunction of Transmission between Remote Control
and Indoor Unit
Remote Control
Display
U5
Applicable
Models
AII indoor unit models
Method of
Malfunction
Detection
In case of controlling with 2-remote control, check the system using microcomputer is signal
transmission between indoor unit and remote control (main and sub) is normal.
Malfunction
Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
Malfunction of indoor unit remote control transmission
Connection of two main remote controls (when using 2 remote controls)
Defect of indoor unit PCB
Defect of remote control PCB
Malfunction of transmission caused by noise
Troubleshooting
Caution
(V2
8
2
3
)
NO
YE
S
YE
S
NO
NO
NO
YE
S
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.
U
s
ing 2-remote
control
s
control.
All indoor
PC
b
o
a
rd microcomp
u
ter
monitor
s b
link.
M
u
lti-core
c
ab
le i
s us
ed for the
indoor
u
nit remote
control tr
a
n
s
mi
ss
ion
wiring.
SS
1 of
b
oth remote control
s
i
s s
et to "MAIN."
Oper
a
tion
ret
u
rn
s
to norm
a
l when
the power i
s
t
u
rned off
moment
a
rily.
S
et one remote control to
"
S
UB"; t
u
rn the power
su
pply
off once
a
nd then
ba
ck on.
Repl
a
ce indoor
u
nit
PC
b
o
a
rd.
There i
s
po
ss
i
b
ility of
m
a
lf
u
nction c
aus
ed
b
y noi
s
e.
Check the
su
rro
u
nding
a
re
a
a
nd t
u
rn on
a
g
a
in.
S
witch to do
ub
le-core
independent c
ab
le.
repl
a
cement
Defect of remote control PC
b
o
a
rd or indoor
u
nit PC
b
o
a
rd. Repl
a
ce whichever i
s
defective.
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 ...