4. ELECTRICAL WIRING DIAGRAMS
YKB/YLM 2nd
2 - 152
Y (HIGH
COP
)
MEE15K022
HIC bypass,Controls refrigerant
flow in HIC circuit
Subcooled liquid refrigerant
temperature
For opening/closing the discharge
suction bypass
SV2
R1,5
Resistor
For inrush current prevention
Pipe temperature
Outdoor unit heat exchanger
capacity control
SV5b
RSH01/02,RSH1
For current detection
Indoor/Outdoor transmission cable
For opening/closing the bypass circuit
Central control transmission cable
C30~C37
Capacitor (inverter main circuit)
L
Choke coil (for high frequency noise reduction)
SV1a
Subcool bypass outlet temperature
LEV2a,b
21S4a
Symbol
<Symbol explanation>
63H1
63HS1
63LS
72C
21S4b,c
CT12,CT22,CT3
LEV1
DCL
Pressure control,Refrigerant flow
rate control
Solenoid
valve
For opening/closing the bypass
circuit under the O/S
Heat exchanger capacity control
4-way valve
Explanation
Pressure
sensor
Cooling/Heating switching
Pressure
switch
High pressure protection for the
outdoor unit
Discharge pressure
Low pressure
Magnetic relay (inverter main circuit)
Current sensor(AC)
Linear
expansion
valve
DC reactor
TH2
Z25
THHS
TH7
TH6
TH5
TH4
TH3
TB7
TB3
TB1
SV9
Thermistor
Discharge pipe temperature
ACC inlet pipe temperature
OA
temperature
IPM temperature
Function setting connector
Power supply
T
erminal
block
*1.Single-dotted lines indicate wiring not supplied
with the unit.
*2.Dot-dash lines indicate the control box boundaries.
*3.Refer to the Data book for connecting input/output
signal connectors.
*4.Daisy-chain terminals (TB3) on the outdoor units in
the same refrigerant system together
.
*5.Faston terminals have a locking function.
Make sure the terminals are securely locked in place
after insertion. Press the tab on the terminals to
removed them.
*6.Control box houses high-voltage parts. Before
inspecting the inside of the control box,turn of
f
the power
, keep the unit of
f for at least 10 minutes,
and confirm that the voltage between FT
-P
and FT
-N on
INV Board has dropped to DC20V or less.
SV10,SV1
1
For opening/closing the defrost circuit
TH9,TH1
1
Heat exchanger outlet pipe temperature
FT2-P
F101
DC700V
4A
T
FT2-N
C102
R104~R106
R101~R103
C101
+
+
F121
DC700V
4A
T
C151,C152
RSH01/02
F121
DC700V
4A
T
C151,C152
CNINV
F
AN Board
CN3
green
1
3
CONNECT
Board
5
4
3
2
1
1
1
2
3
CN2A
1
2
3
CN2
M2
CPU power
supply circuit
M1
CN332
blue
1
2
12
X05
X06
3
5
1
6
CN505
1
3
W
V
U
Fan motor
(Heat exchanger)
CN4
black
M1
LED1:Normal operation(Lit)
/ Error(Blink)
LED4:CPU in operation
3
IPM
CNVDC
1
CN81
green
CN80
SW001
4
2
L3
N
2
3
6
5
4
3
2
1
2
1
1
6
OFF
ON
4
1
4
1
7
CNINV
1
4
redCNPS
1
3
2
1
TP1
TP2
TB3
2
3
CN201
blue
CN4A
black
TB7
S
CNAC
5
12
34
CN81
green
5
4
3
1
1
2
t
˚
LEV2a
M
1
2
3
4
6
1
2
3
4
1
2
5
6
3
6
5
3
1
CN202
green
3
L1
L2
3
1
3
4
black
CN103
Fan motor
(Heat exchanger)
U
V
W
7
1
4
3
4
1
1
3
t
3
SW001
1
4
1
2
˚
CN2
1
5
1
1
2
3
4
12
1
3
3
1
4
3
2
2
3
1
1
CNSNR
M2
TH2
TH4
4
t
4
˚
t
1
1
1
CN21
1
green
2
3
123
321
SV1a
U
CN83
black
21S4a
Power Source
3N~
50/60Hz
380/400/415V
5
˚
2
CN104
4
4
1
1
1
3
2
Noise filter
1
2
3
Surge
absorber
red
black
MS
3~
2
1
2
3
1
CN6
1
21
MS
3~
3
2
CN82
blue
yellow
CNPOW
t
t
˚
˚
1
654
X10
ON
X07
X09
X1
1
Unit address
setting
CT12
C31,C33,
C35,C37
CN5
red
D1
R4
-
Z5
1
3
5
5
5
1
1
1
6
white
12
3
4
3
green
CN62
SET
UP(SW6-10)
LED1
Display
setting/
Function
setting
CN51
DC12V
Function
setting
CN990
green
CN213
green
CNTYP4
F4AC250V
6.3A
T
R5
*3Compressor ON/OFF output
Error detection output
CN201
Z25
TH5
TH6
SWU2
LED1
R31,R33,
R35
R30,R32,
R34
SW6
10
Control Board
TH3
CN40
63HS1
CN41
TH7
1
5
2
3
4
1
SW4
LED3
5
LEV1
3
3
SC-V
CT22
SC-U
V
+
CN4
blue
red
M
+
OFF
t
black
CN506
red
CNTYP2
black
6
yellow
CN3K
*3
TB21
CN1A
U
CN2
blue
CN3N
+
3
21S4b
21S4c
TB1
CN1B
TB7 Power
selecting
connector
CNVDC
1
IPM
2
6
L3
N
DCL
black
72C
white
red
2
6
ON
OFF
M-NET
power
supply circuit
1
2
M-NET
Board
Power failure
detection circuit
Indoor/Outdoor
transmission
cable
INV Board
red
TB23
TB24
L2
L1
+
ON
1's
digit
THHS
CN102
1
4
1
1
W
10's
digit
OFF
LED2:Normal operation(Lit)
/ Error(Blink)
CNS2
yellow
CNDC
red
red
MS
3~
2
2
C100
*5
U
LED1:Power supply to
Indoor/Outdoor
transmission line
ZNR400
6
black
Central control
transmission
cable
*6
SC-L1
ON
OFF
FT
-N
Motor
(Compressor)
redCN3S
1
CN04
red
CN43
yellow
1
SC-P2
P
CN61
green
CN202
red
6
N
CN1
1
2
LED1:Normal operation(Lit)
/ Error(Blink)
*4
SC-W
SC-L3
2
CNR
YB
P
63H1
4
1
SW5
10
5
CN3D
1
black
CNAC2
1
ON
OFF
10
SWU1
white
CN212
red
SC-L2
3
6
2
CN80
4
CNTYP5
green
LED4:CPU in operation
LED1:Normal operation(Lit)
/ Error(Blink)
5
CN801
red
CNSNR
5
˚
IPM
4
SC-P1
FT
-P
black
C30,C32,
C34,C36
red
DB1
CT3
C1
CNTYP
black
R1,R5
black
TB22
SWP1
RSH1
R6
C1
1
F
AN Board
63LS
ZNR1
U
L
Noise
Filter
2
CN507
black
CN508
blue
3
3
6
4
SV9
SV2
Noise filter
72C
6
7
red
1
2
C
N
LVA
CNL
VB
red
1
F01
AC250V
3.15A
T
white
black
1
CNIT
red
L1
L2
L3
N
4
1
RSH01/02
LEV2b
M
1
2
3
4
6
CNL
VD
5
CNTYP1
black
1
2
t
˚
TH9
TH1
1
t
X04
3
1
CN504
SV1
1
X03
3
1
CN503
SV10
X08
SV5b
˚
green
yellow
blue
CN1
10
black
1
2
6
PUHY
-EP400, 450YLM-A1 (-BS)
