Troubleshooting for Outdoor Unit
SiENBE18-621
346
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
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.
(V
3
169)
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
*
Norm
a
l
NO
NO
There
a
re too m
a
ny indoor
u
nit
s
within the
sa
me refriger
a
nt
s
y
s
tem.
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
.
YE
S
I
s
the o
u
tdoor
P.C.
b
o
a
rd repl
a
ced
to
s
p
a
re p
a
rt
s
PC
b
o
a
rd?
YE
S
The refriger
a
nt cl
ass
ific
a
tion h
as
not
b
een
s
et yet.
NO
YE
S
Doe
s
a
m
a
lf
u
nction occ
u
r?
Repl
a
ce o
u
tdoor
u
nit PC
b
o
a
rd
(A1P).
M
a
tche
s
the refriger
a
nt type of
indoor
a
nd o
u
tdoor
u
nit.
NO
YE
S
Doe
s
the
refriger
a
nt type of indoor
a
nd o
u
tdoor
u
nit
m
a
tch?
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...
