Troubleshooting for Outdoor Unit
SiENBE18-621
336
Troubleshooting
Troubleshooting
∗
2: Voltage measurement point
∗
1: Refer to “Thermistor Resistance / Temperature Characteristics” table on P355.
∗
2: Refer to “Pressure Sensor, Pressure / Voltage Characteristics” table on P357.
(V2
8
19)
The
su
ction
pipe1 temp. min
us
low pre
ssu
re
sa
t
u
r
a
tion
temp. i
s
20 °C
or higher.
Re
s
i
s
t
a
nce
i
s
norm
a
l when
me
asu
red with the
thermi
s
tor (R
3
T) for
su
ction pipe1 di
s
connected
from the o
u
tdoor
u
nit PC
b
o
a
rd.
*
1
O
u
t of g
as
or refriger
a
nt
s
y
s
tem i
s
clogged. Re
qu
ire
s
check of refriger
a
nt
s
y
s
tem.
Repl
a
ce the thermi
s
tor.
Repl
a
ce the o
u
tdoor
u
nit PC
b
o
a
rd (A1P).
YE
S
YE
S
NO
NO
O
u
t of g
as
, clo
s
ing of
s
top
v
a
lve or refriger
a
nt
s
y
s
tem i
s
clogged. Re
qu
ire
s
check of
refriger
a
nt
s
y
s
tem.
Repl
a
ce m
a
in o
u
tdoor
u
nit
PC
b
o
a
rd (A1P).
YE
S
YE
S
I
s
the
low pre
ssu
re
s
en
s
or
correct?
Repl
a
ce the low pre
ssu
re
s
en
s
or.
NO
NO
Cooling
Low pre
ssu
re i
s
0.25 MP
a
or
le
ss
.
The
volt
a
ge
of X1
8
A pin
s
(2)
a
nd (
3
) on m
a
in
o
u
tdoor
u
nit PC
b
o
a
rd
(A1P) i
s
1.0 VDC or le
ss
.
(Low pre
ssu
re
s
en
s
or o
u
tp
u
t
volt
a
ge)
*
2
NO
NO
YE
S
YE
S
Repl
a
ce low pre
ssu
re
s
en
s
or.
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.
+5V
X1
8
A
(V2
8
09)
GND
O
u
tdoor
u
nit PC
b
o
a
rd A1P
Microcomp
u
ter
A/D inp
u
t
*
2 Me
asu
re volt
a
ge here.
Lo
w pre
ssu
re
s
en
s
or
Red
Bl
a
ck
White
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...