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Troubleshooting for Outdoor Unit
SiEN18-622
398
Troubleshooting
7.33 Excessive Number of Indoor Units
Remote Control
Display
UA
Applicable
Models
AII indoor unit models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Excess of connected indoor units
Defect of outdoor unit PCB (A1P)
Mismatching of the refrigerant type of indoor and outdoor unit.
Setting of outdoor PCB was not conducted after replacing to spare parts PCB.
Troubleshooting
∗
The number of indoor units that can be connected to a single outdoor unit system depends on
the type of outdoor unit.
Caution
(V
3
169)
Norm
a
l
NO
NO
YE
S
YE
S
NO
YE
S
Doe
s a
m
a
lf
u
nction occ
u
r?
NO
YE
S
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.
I
s
the o
u
tdoor PC
b
o
a
rd repl
a
ced to
s
p
a
re p
a
rt
s
PC
b
o
a
rd?
Doe
s
the
refriger
a
nt type of
indoor
a
nd o
u
tdoor
u
nit
m
a
tch?
P
us
h
a
nd hold the RE
S
ET
bu
tton on the o
u
tdoor
u
nit
PC
b
o
a
rd for 5
s
econd
s
.
The tot
a
l
of indoor
u
nit
s
di
s
pl
a
ying
“
UA
” a
nd
indoor
u
nit
s
connected to
the
sa
me refriger
a
nt
s
y
s
tem i
s
within
connect
ab
le
n
u
m
b
er of
u
nit
*
The refriger
a
nt cl
ass
ific
a
tion
h
as
not
b
een
s
et yet.
There
a
re too m
a
ny indoor
u
nit
s
within the
sa
me refriger
a
nt
s
y
s
tem.
M
a
tche
s
the refriger
a
nt type of
indoor
a
nd o
u
tdoor
u
nit.
Repl
a
ce o
u
tdoor
u
nit PC
b
o
a
rd
(A1P).
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 ...