2 - 318
R2 (HIGH
COP)
4. ELECTRICAL WIRING DIAGRAMS
YKB/YLM 2nd
MEE15K022
FT2-N
F101
DC700V
4A
T
FT2-P
C102
R104~R106
R101~R103
C101
+
+
F121
DC700V
4A
T
C151,C152
F121
DC700V
4A
T
C151,C152
RSH01/02
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
red
CNPS
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
LEV5b
M
1
2
3
4
6
1
2
3
4
1
2
6
3
6
5
3
1
CN202
green
3
L1
L2
3
1
3
4
black
CN103
Fan motor
(Heat exchanger)
U
V
W
CNINV
7
1
4
3
4
1
1
3
3
SW001
1
4
1
2
CN2
1
5
1
1
3
4
12
1
3
3
1
4
3
2
2
3
1
1
CNSNR
M2
TH4
4
4
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
1
654
X10
ON
X08
X12
X14
X07
X1
1
X13
Unit address
setting
CT12
C31,C33,
C35,C37
CN5
red
D1
R4
-
Z5
1
3
3
3
5
5
5
1
1
1
6
6
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
LEV5a
3
3
SC-V
CT22
SC-U
V
+
CN4
blue
red
M
+
OFF
black
CN506
red
CN508
blue
CN509
yellow
CNTYP2
black
6
yellow
CN3K
*3
TB21
SV5b
SV4d
SV4c
SV4b
SV4a
CN1A
U
CN2
blue
CN3N
+
3
21S4b
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
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
LED1:Power supply to
Indoor/Outdoor
transmission line
6
black
Central control
transmission
cable
*6
SC-L1
ON
OFF
FT
-N
Motor
(Compressor)
red
CN3S
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
3
3
6
4
SV9
Noise filter
72C
6
7
red
1
2
1
C
N
LVA
CNL
VB
red
1
F01
AC250V
3.15A
T
white
black
1
CNIT
red
L1
L2
L3
N
4
1
X09
SV7
*7
5
TH12
2
t
˚
t
˚
t
˚
t
˚
t
˚
t
˚
t
˚
t
˚
t
˚
CNTYP1
black
TH9
1
2
TH1
1
3
1
CN504
SV1
1
3
1
CN503
SV10
RSH01/02
X03
X04
green
yellow
CN1
10
black
1
2
Power failure
detection circuit
U
ZNR400
R1,5
Resistor
For inrush current prevention
RSH01/02,RSH1
For current detection
Indoor/Outdoor transmission cable
Linear expansion valve (for the control of
evaporating temperature)
Central control transmission cable
Subcooled liquid refrigerant
temperature
SV4a,b,c,d
Pipe temperature
Outdoor unit heat exchanger
capacity control
SV5b
C30~C37
Capacitor (inverter main circuit)
L
Choke coil (for high frequency noise reduction)
SV1a
Heat exchanger capacity control
21S4a
Symbol
<Symbol explanation>
63H1
63HS1
63LS
72C
21S4b
CT12,CT22,CT3
LEV5a,b
DCL
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)
DC reactor
Z25
THHS
TH7
TH6
TH5
TH4
TH3
TB7
TB3
TB1
SV7,SV9
Thermistor
Discharge pipe temperature
ACC inlet pipe temperature
OA
temperature
IPM temperature
Function setting connector
Power supply
T
erminal
block
For opening/closing the bypass
circuit
*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.
*7.Dif
ference of appliance.
P450/500
Model name
*7 do not exist
appliance
EP400/450
*7 exist
SV10,SV1
1
For opening/closing the defrost
circuit
TH9,TH1
1,TH12
Heat exchanger outlet pipe temperature
PURY-EP400, 450YLM-A1 (-BS)
