Troubleshooting for BP Unit
SiENBE18-621
304
Troubleshooting
Troubleshooting
Check No.14
Refer to P.306
Check the o
u
tdoor
u
nit'
s
LED A.
Check the indoor
u
nit-o
u
tdoor
u
nit
connection wire
s
.
YE
S
YE
S
Repl
a
ce the connection
wire
s
b
etween the
indoor
a
nd o
u
tdoor
u
nit
s
.
Repl
a
ce indoor
u
nit
control PCB .
Loc
a
te the c
aus
e of the
di
s
t
u
r
ba
nce of the power
su
pply w
a
veform,
a
nd
correct it.
Correct the indoor
u
nit-o
u
tdoor
u
nit
connection wire
s
.
Norm
a
l
(Addre
ss
S
etting w
as
not cond
u
cted)
I
s
there
a
ny wiring error?
NO
(Q0
3
9
3
)
I
s
LED A
b
linking?
I
s
the volt
a
ge 0 V?
NO
Check No. 14
Check power
su
pply w
a
veform.
Check the volt
a
ge of the indoor
u
nit-o
u
tdoor
u
nit connection wire
s
b
etween No. 1
a
nd No. 2,
a
nd
b
etween No 2
a
nd No.
3
.
YE
S
YE
S
NO
I
s
there
a
ny di
s
t
u
r
ba
nce?
NO
P
us
h
a
nd hold the RE
S
ET
bu
tton on
the o
u
tdoor
u
nit PCB for 5
s
econd
s
NO
Doe
s
the m
a
lf
u
nction
occ
u
r
a
g
a
in?
YE
S
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.
I
s
HAP
b
linking?
NO
NO (ON or OFF)
I
s
HAP
b
linking?
Check for
indoor
u
nit
microcomp
u
ter
norm
a
l HAP
YE
S
T
u
rn the power
su
pply off once
a
nd then
ba
ck on.
F
au
lty indoor
u
nit PCB
or m
a
lf
u
nction of power
su
pply
s
y
s
tem.
Re
s
et
s
norm
a
lly.
Co
u
ld re
su
lt from
extern
a
l c
aus
e
(e.g. noi
s
e).
I
s
LED A
b
linking?
NO
YE
S
T
u
rn power
su
pply off,
a
nd
t
u
rn on
a
g
a
in.
F
au
lty BP
u
nit PCB or
m
a
lf
u
nction of power
su
pply
s
y
s
tem.
Co
u
ld re
su
lt from
extern
a
l c
aus
e
(e.g. noi
s
e).
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...