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SiEN18-622
Troubleshooting for SkyAir Indoor Unit
Troubleshooting
347
5.12 Transmission Error (between Indoor Unit and Remote
Control)
Remote Control
Display
U5
Applicable
Models
FFQ, FCQ, FBQ, FHQ
Method of
Malfunction
Detection
Microcomputer checks if transmission between indoor unit and remote control is normal.
Malfunction
Decision
Conditions
When transmission is not carried out normally for a certain amount of time
Supposed
Causes
Failure of remote control
Failure of indoor PCB
Outside cause (noise, etc.)
Connection of 2 master remote controls (When using 2 remote controls)
Troubleshooting
(Q0420)
Ch
a
nge to do
ub
le-core
independent c
ab
le.
YE
S
YE
S
YE
S
YE
S
YE
S
YE
S
NO
NO
NO
NO
NO
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.
Control
b
y 2
remote control
s
All indoor
u
nit
PCB microcomp
u
ter
norm
a
l monitor
s
b
linking
U
s
ing m
u
lticore
tr
a
n
s
mi
ss
ion wiring
b
etween indoor
u
nit
a
nd
remote control
I
s
it good
condition from noi
s
e
interference?
SS
1 of
b
oth
remote control
s
i
s
s
et to "m
a
in."
Re
s
et
s
norm
a
lly when power
su
pply i
s
t
u
rned off
tempor
a
rily.
S
et one of the remote
control
s
to"
sub
,"t
u
rn off
the power
su
pply
tempor
a
rily, then re
s
t
a
rt
oper
a
tion.
Indoor
u
nit PCB
repl
a
cement
M
a
lf
u
nction co
u
ld
b
e
prod
u
ced
b
y noi
s
e.
Check the
su
rro
u
nding
a
re
a a
nd re
s
t
a
rt
oper
a
tion.
F
a
il
u
re of remote
control PCB or
repl
a
cement of
defective indoor
u
nit PCB
M
a
lf
u
nction co
u
ld
b
e
prod
u
ced
b
y noi
s
e. Check
the
su
rro
u
nding
a
re
a a
nd
re
s
t
a
rt oper
a
tion.
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 ...