9
4
WIRING DIAGRAM
SEZ-A12AR.TH
SEZ-A18AR.TH
SEZ-A24AR.TH
FOR A18/24 (1:1 SYSTEM)
OR MULTI SYSTEM
FOR A12
(1:1 SYSTEM)
X5
X4
X2
REMOTE CONTROLLER
BOARD
R.B
RT12
RT11
I.B
RT13
FUSE
X4
X2
ZNR1
52C
4
3
w
TRANS
DC13.1V
BLK
C1
MF
X5
N
w
BLU
CIRCUIT BREAKER
TB
GRN/YLW
N
w
WHT
GRN/YLW
w
BLU
TO OUTDOOR
UNIT
CONNECTING
w
RED
L
12VDC
220-240V~ 2
N
3
w
WHT
TB
POWER SUPPLY
~/N
220-240V 220V
50Hz 60Hz
2
TO OUTDOOR
UNIT
CONNECTING
12V DC 3
[LEGEND]
INDOOR CONTROLLER
BOARD
I.B
52C
COMPRESSOR CONTACTOR
RELAY(FAN MOTOR)
X2,X4,X5
NAME
SYMBOL
NAME
SYMBOL
VARISTOR
ZNR1
FUSE(3.15A)
FUSE
MF
FAN MOTOR
ROOM TEMPERATURE
THERMISTOR
RT11
RT12
PIPE TEMPERATURE
THERMISTOR / LIQUID
C1
FAN MOTOR CAPACITOR
TERMINAL BLOCK
TB
RT13
CONDENSER / EVAPORATOR
TEMPERATURE THERMISTOR
1.Since the indoor fan motor(MF) is connected with 50Hz power,if 60Hz power is used, change the wiring
connection showing fig: *1
Indoor Fan Motor(MF) for 60Hz
2.About the outdoor side electric wiring refer to the outdoor unit electlic wiring diagram for servicing.
3.Use copper conductors only. (For field wiring)
4.Symbols below indicate.
: Terminal block : Connector
How to remove the terminals shown at "
w
" mark.
sleeve
1
Slide the sleeve.
2
Pull the wire while pushing the locking lever.
locking lever
"
w
" shows the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire.
Be sure to pull the wire by pushing the locking lever (projected part) of the terminal with a finger.
NOTES:
60
BLUE
YELLOW
50
fig: *1
BLUE
BLU
TRANSMISSION WIRE
DC12V
2
1
TB
CN2
R.B
1
BLU
BLU
2
TB
(REMOCON)
BLU
CN22
2
1
2
2
1
1
(LIQUID)
(INTAKE)
CN21
CN20
RED
WHT
CN29
BLK
2
1
(2 PHASE)
FAN1
FAN2(FAN)
RED
CND(POWER)
(FAN)
5
3
1
7
5
3
1
WHT
WHT
BLU
YLW
1
3
5
WHT
BRN
RED
ORN
★
★
★
The 12V DC is NOT always against the ground.
Terminal 3 has 12V DC against terminal N.
However, between 3 and 2, these terminals are
NOT electrically insulated by the transformer or
other device.
OC303-A-1.qxp 04.9.21 4:08 PM Page 9
