Troubleshooting for Outdoor Unit
SiENBE18-621
342
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
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.
(V2
8
2
3
)
NO
YE
S
YE
S
NO
Repl
a
ce indoor
u
nit PC
b
o
a
rd.
S
et one remote control to
"
S
UB"; t
u
rn the power
su
pply
off once
a
nd then
ba
ck on.
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.
NO
NO
U
s
ing
2-remote control
control.
All indoor
PC
b
o
a
rd microcomp
u
ter
monitor
s
b
link.
YE
S
M
u
lti-core
c
ab
lei
s
us
ed for the
indoor
u
nit remote control
tr
a
n
s
mi
ss
ion
wiring.
Oper
a
tion
ret
u
rn
s
to norm
a
l when
the power i
s
t
u
rned off
moment
a
rily.
YE
S
YE
S
SS
1 of
b
oth remote control
i
s
s
et to "MAIN."
NO
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 BPMKS967B2B
Page 1: ...SiENBE18 621 E Series Service Manual Applied Models Super Multi Plus Heat Pump...
Page 12: ...SiENBE18 621 List of Functions 1 Part 1 List of Functions 1 List of Functions 2...
Page 19: ...List of Functions SiENBE18 621 8 List of Functions...
Page 33: ...Specifications SiENBE18 621 22 Specifications...
Page 69: ...Refrigerant Flow for Each Operation Mode SiENBE18 621 58 Refrigerant Circuit...
Page 121: ...Indoor Unit SkyAir Models SiENBE18 621 110 Function...
Page 169: ...Instruction SiENBE18 621 158 System Configuration FTXS 20 25 35C Indoor Unit...
Page 371: ...Method of Replacing The Inverter s Power Transistors Modules SiENBE18 621 360 Troubleshooting...
Page 393: ...SiENBE18 621 vi Index...